126 results on '"Khan, D."'
Search Results
2. Structural, Magnetic, and Ferroelectric Phase Transitions and Energy Storage Efficiency in Ba1-xLaxTi1-xFexO3 Ceramics
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Hoang, T. P., Truong-Son, L. V., Phan, Lien, Nghiem, N. T., Truong-Tho, N., Tiep, N. H., Jabarov, S. H., Tien, D. P. T., Tran, T. A., Dang, N. T., Bich, D. D., and Khan, D. T.
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- 2024
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3. Enhanced photocatalytic activity and ferromagnetic ordering in hydrogenated Zn1−xCoxO
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Petrov, Dimitar N., Dang, N. T., Co, N. D., Tu, B. D., Lam, N. D., Quang, T. V., Nguyen, V. Q., Lee, J. H., Huy, B. T., Yang, D. S., Khan, D. T., and Phan, T. L.
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- 2024
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4. Sewage Treatment by Kolkata’s Natural Wetland System
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I. Khan, D. Das Gupta and A. Gupta
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nature-based sewage treatment east kolkata wetlands, resource recovery, sewage-fed fishery ,Environmental effects of industries and plants ,TD194-195 ,Science (General) ,Q1-390 - Abstract
The metropolis of Kolkata stands uniquely positioned to implement a natural sewage treatment paradigm through the utilization of waste stabilization ponds, specifically within the East Kolkata Wetlands (EKW). These shallow oxidation ponds harness solar irradiation and algae bacteria symbiotic processes to effectively treat incoming sewage. Concurrently, nutrient-rich effluents are assimilated through fish production, converting available nutrients into protein—a hallmark of nature-based treatment. A portion of raw sewage is used to cultivate a chunk of vegetables before treatment in fish ponds, and the reclaimed water after treatment is used for vegetable and paddy cultivation downstream. This investigation explains the delineation of a sewage flow system to EKW, a Ramsar-designated site. Substantively, it offers quantitative insights into the sewage volumes and quality undergoing treatment. The sewage flow is higher in the winter months (909.07 MLD) compared to the summer months (709.34 MLD). In general, the sewage from the Kolkata city flowing to the EKW is moderately polluted. Extensive scrutiny of sewage from pond inlets and outlets serves as a quantitative metric for evaluating treatment efficacy. EKW efficiently treats the sewage, demonstrating 59.1% Biological Oxygen Demand (BOD) removal and a 99.28% reduction in fecal coliform. The natural treatment system excels in removing ammoniacal nitrogen (80.38%) and phosphate (90%). The treated water’s quality along the EKW boundary, culminating at the Kulti Gong River discharge point, was systematically assessed. Analytical findings indicate that all measured concentrations in the treated water adhere to prescribed inland surface water discharge standards prescribed by the Central Pollution Control Board, India, barring a marginal elevation in BOD during winter. Evidently, the EKW system adeptly manages substantial sewage volumes, fostering efficient treatment while concurrently facilitating resource recovery through fish production, yielding economic dividends. Despite its substantial land footprint, preserving this inherently sustainable wastewater management paradigm is imperative.
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- 2024
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5. Arthroscopic lasso-loop technique for subscapularis repair with anterolateral viewing portal yields better clinical outcomes for Lafosse grade 3 and 4 tears: a prospective study with minimum 2 years of follow-up
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Arun Mundakkal, DNB Ortho, Aebel Raju, MBBS, MRCS, Ayyappan Vijayachandran Nair, D'Ortho, DNB Ortho, Yon-Sik Yoo, MD, PhD, Radhesh Nambiar, D Ortho, Azad Sait, D Ortho, MS Ortho, Ajayakumar Thankappan, MS Ortho, and Prince Shanavas Khan, D Ortho, MS Ortho
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Level IV ,Case Series ,Treatment Study ,Orthopedic surgery ,RD701-811 ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Background: Contracted subscapularis tears, especially Lafosse grade 3 and 4, pose a significant challenge in surgical repair due to the need for extensive release of retracted tendon and the risk of cut-through due to poor tissue quality. The posterior viewing portal may hinder adequate visualization and extensive release of retracted tendons, particularly in addressing the bursal surface of the tears. Tension-free robust repair is critical to prevent retears and for achieving successful outcomes for these massive and complex retracted tears. This study investigates the clinical outcomes of the Lasso-Loop technique with an anterolateral viewing portal, aiming to enhance tendon release, improve footprint fixation, and optimize tissue grip, particularly in cases of chronic retracted Lafosse 3 and 4 tears. This innovation also eliminates the need for arthroscope switching and serves as a crucial measure for averting axillary nerve injuries during the procedure. Methods: The study included 40 patients with isolated subscapularis or combined anterosuperior rotator cuff tears (Lafosse grade 3 and 4) that underwent arthroscopic subscapularis repair using a Lasso-Loop technique through an anterolateral viewing portal. Evaluations were conducted both preoperatively and at predefined postoperative intervals: 6 weeks, 3 months, 6 months, 1 year, and 2 years. The evaluations in this study encompassed a comprehensive range of clinical assessments, which included a complete range of movements, specialized tests for subscapularis muscle functionality (specifically the lift-off test and belly press test), the utilization of the University of California at Los Angeles and Oxford shoulder scoring systems, and a postoperative ultrasonography conducted at the 6-month mark to assess the presence of any retear. Clinical outcomes were compared with that of the opposite normal shoulder. Results: There was considerable improvement in the active painless range of motion postoperatively. During the 2-year follow-up, the positive belly press test decreased from 50% (n = 20) to 2.5% (n = 1), while the positive lift-off test decreased from 100% (n = 40) to 5% (n = 2). The modified University of California at Los Angeles score increased significantly from 10.15 preoperatively to 30.17 at 2 years postoperatively (P value = .001). Oxford’s Shoulder Score increased significantly from 15.6 preoperatively to 40.64 at 2 years postoperatively (P value = .001). Conclusion: This technique has produced positive functional outcomes, in cases categorized as massive subscapularis tears and chronic tears indicating the superiority over other conventional techniques of subscapularis repair described in the literature.
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- 2024
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6. Optimization of zeolite ETS-10 synthesis for enhanced Pb(II) adsorption from aqueous solutions
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Pham, Van-Hien, Duong, Bich-Ngoc, Nguyen, Duy-Khoi, Ton-That, Loc, Dang, N.T., Thanh Khan, D., Tran, Ngoc-Quyen, Nguyen, Ngoc Duy, and Dinh, Van-Phuc
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- 2024
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7. Variations in soil physico-chemical properties, soil stocks, and soil stoichiometry under different soil layers, the major forest region Liupan Mountains of Northwest China/ Variares nas propriedades fisico-quimicas do solo, estoques e estequiometria do solo sob diferentes camadas de solo, a principal regiao florestal das montanhas Liupan do noroeste da China
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Rahman, M., Zhang, K., Wang, Y., Ahmad, B., Ahmad, A., Zhang, Z., Khan, D., Muhammad, D., and Ali, A.
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- 2024
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8. Morpho-physiological and phytohormonal changes during the induction of adventitious root development stimulated by exogenous IBA application in Magnolia biondii Pamp/ Alteracoes morfofisiologicas e fito-hormonais durante a inducao do desenvolvimento radicular adventicio estimulado pela aplicacao exogena do AIB em Magnolia biondii Pamp
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Khan, M.A., Wang, Yi, Muhammad, B., Uddin, S., Saeed, A., Khan, D., Ali, M., Saeed, S., and Jia, Zhongkui
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- 2024
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9. Efficacy of Citrullus colocynthis seed extract on Earias vittella, Fabricius, (Lepidoptera: Noctuidae): environment sustainable approach/Eficacia do extrato de semente de Citrullus colocynthis em Earias vittella Fabricius (Lepidoptera: Noctuidae): abordagem ambiental sustentavel
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Hassam, U.A., Gulzar, A., Rasool, B., Zafar, S., Younis, T., Shakeel, M., Khan, D., Ullah, S., Khaliq, S., Ahmad, S.F., and Hafeez, M.
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- 2024
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10. Improvement in Sepsis Mortality With Consistent Implementation of 3 Hour Sepsis Bundle and Healthcare Professional Education
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Iqbal, P., primary, Sharma, P., additional, Khan, D., additional, Al-Khazraji, Y., additional, Alladin, F., additional, Singh, R., additional, Shah, D., additional, Ahmed, F., additional, Nawaz, S., additional, Poor, A., additional, and Kahlon, S., additional
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- 2024
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11. Managing Intermediate High-Risk Pulmonary Embolism in a Patient With Deep Venous Thrombosis: A Case Report
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Iqbal, P., primary, Sharma, P., additional, Alladin, F., additional, Al-Khazraji, Y., additional, Ahmed, F., additional, Nawaz, S., additional, Khan, D., additional, and Kahlon, S., additional
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- 2024
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12. Socioeconomic changes influence hunter behavior in the northern periphery of Dja Faunal Reserve, Cameroon.
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Kuenbou, J. K., Tagg, N., Khan, D. M., Speelman, S., and Willie, J.
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WILDLIFE refuges ,BUSHMEAT hunting ,WILDLIFE conservation ,INCENTIVE (Psychology) ,WILDLIFE management - Abstract
Copyright of Animal Conservation is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2024
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13. Assessing the Efficacy of Active Learning to Support Student Performance Across Undergraduate Programmes in Biomedical Science
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Lees-Murdock, D. J., primary, Khan, D., additional, Irwin, R., additional, Graham, J., additional, Hinch, V., additional, O’Hagan, B., additional, and McClean, S., additional
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- 2024
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14. DESIGNING THE ACOUSTICS OF AUDITORIA FOR POWERFUL SOUND SYSTEMS
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EDWARDS, N, primary, KHAN, D, additional, and JANSSEN, C, additional
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- 2024
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15. Enhanced photocatalytic activity and ferromagnetic ordering in hydrogenated Zn1−xCoxO.
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Petrov, Dimitar N., Dang, N. T., Co, N. D., Tu, B. D., Lam, N. D., Quang, T. V., Nguyen, V. Q., Lee, J. H., Huy, B. T., Yang, D. S., Khan, D. T., and Phan, T. L.
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PHOTOCATALYSTS ,BAND gaps ,X-ray powder diffraction ,ELECTRONIC structure ,RIETVELD refinement ,SILVER ,IRRADIATION ,MAGNETIC entropy - Abstract
Impacts of hydrogen annealing on crystallographic characterization, electronic structure, and optical, photocatalytic, and magnetic properties of polycrystalline Zn
1−x Cox O (x = 0.01–0.06) samples have been considered. Structural analyses based on powder X-ray diffraction, Rietveld refinement, and Raman spectroscopy prove all materials having the P63 mc wurtzite-type structure. The Co-doping and hydrogenation changed the concentration of Zn– and O–related defects whose energy levels occupy the band gap. This also enhanced photocatalytic performance of hydrogenated samples with x > 0.02. X-ray and UV–Vis absorption analyses indicate the substitution of Co2+ for Zn2+ in the wurtzite-type ZnO lattice, leading to irregularly changed the unit-cell parameters. While all the as-prepared samples are paramagnetic, the hydrogenated ones exhibit weak ferromagnetism. Ferromagnetic (FM) ordering increases when x increases, particularly for x ≥ 0.02. According to the results achieved from studying crystalline and electronic structures, we believe that oxygen-vacancies-mediated interactions between Co2+ ions and H–Co–H exchange dimers enhanced FM ordering in hydrogenated Zn1−x Cox O. Computational investigations have also indicated that the magnetization value of H–Zn1−x Cox O is influenced by the positioning of the H dopant, meaning that the couplings between Co and H play an essential role in establishing FM order in H–Zn1−x Cox O. [ABSTRACT FROM AUTHOR]- Published
- 2024
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16. 3101 – THE ROLE OF DIOXINS AND DIOXIN-LIKE COMPOUNDS IN HUMAN HEMATOPOIETIC STEM CELL LINEAGE SPECIFICATION
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Khan, D M Isha Olive, Crawford, Robert, and Kaminski, Norbert
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- 2024
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17. COMPARISON OF CONVENTIONAL AND COMPUTER-BASED DETECTION OF SEVERITY SCALES OF STALK ROT DISEASE IN MAIZE.
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QURESHI, S. H., KHAN, D. M., RAZZAQ, A., BAIG, M. M., and BUKHARI, S. Z. A.
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CONVOLUTIONAL neural networks , *CORE competencies , *CORN , *DEEP learning , *BLACKBERRIES ,DEVELOPING countries - Abstract
Various diseases harm the maize crop, but stalk rot has significantly reduced crop yield. The susceptible stalk requires identification by pathologists to apply the precise dose of fungicide to the crop. Farmers in developing nations faced challenges for their timely hiring. Furthermore, differences in pathologists' professional competencies result in inaccurate diagnoses. In this paper, the convolutional neural network (CNN) utilization helped classify the severity levels of stalk rot as elaborated in Hooker's scale. The field experiment commenced at the Maize and Millet Research Institute Yousafwala, Sahiwal, using a smartphone to get images of resistant and susceptible lines fed to the proposed model for evaluation into six severity scales. The model's overall accuracy was 83.58%. Recording of the recall ratio of highly susceptible, susceptible, moderately susceptible, highly resistant, resistant, and moderately resistant had scores of 1.000, 0.766, 0.966, 0.800, 0.733, and 1.000, respectively, with an average of 0.877. Precision for highly resistant was 1.000, resistant was 0.785, moderately resistant was 0.789, moderately susceptible was 0.805, susceptible was 0.958, and highly susceptible was 1.000, with an average of 0.889. Highly significant (P < 0.01) results from the chi-square test exhibited significant differences between traditional and deep learning approaches. The results of the proposed model showed less confusion than the visual-based method. The proposed approach is a vital source of detection of resistant lines against stalk rot disease by developing country farmers. The suggested model eliminates the need for pathologists, making it a valuable tool for identifying stalk rot resistant lines. It aids farmers in finding resistant lines for breeding projects and estimating the fungicide dose against stalk rot. It also helps minimize the production cost and environmental pollution. [ABSTRACT FROM AUTHOR]
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- 2024
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18. High pressure effects on ferroelectric tetragonal phase in BaTi1−xFexO3 (x=1%).
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Tran, T. A., Tran, T. K. C., Nguyen, L. V. T., Khan, D. T., Truong-Son, L. V., Thao, L. T. P., Truong, V. C., Thanh-Nghiem, N., Phuc, H. T., Jabarov, S. H., and Tien, D. P. T.
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FERROELECTRICITY ,PHASE transitions ,FERROELECTRIC polymers ,RAMAN spectroscopy ,X-ray diffraction - Abstract
The pressure-driven phase transformation in polycrystalline BaTi 1 − x Fe
x O3 (x = 1 %), synthesized by a solid-state reaction method, was investigated using synchrotron X-ray diffraction and Raman spectroscopy. All measurements were performed at room temperature within a large pressure range up to 36.5 GPa. The results clearly demonstrate a phase transformation from the ferroelectric tetragonal structure of P4mm symmetry to the paraelectric cubic structure of Pm-3m symmetry in the studied sample at the pressure of about 18 GPa. This phase transformation pressure is much higher than those previously reported for BaTiO3 -based systems, indicating the stabilization of the ferroelectric phase by doping 1% Fe into BaTiO3 . Feature modes of the tetragonal phase still persist while some new modes appear in the Raman spectra at pressures above 18 GPa. This is probably due to accumulated stress and/or local microscopic disorders in the sample, which are associated with the displacement of the Ti atoms along unit-cell diagonals. [ABSTRACT FROM AUTHOR]- Published
- 2024
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19. Food insecurity: The resilient, but “silent poverty” perspectives of older ethnic minority individuals within UK communities.
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McEachern, Morven G., Ellahi, Basma, and Muzahid Khan, D. L.
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FOOD preferences , *FOOD security , *MINORITIES , *SOCIAL determinants of health , *OLDER people , *TEMPORAL integration - Abstract
Food insecurity is acknowledged as a key social determinant of health among older adults. Despite recording significantly higher levels of poverty in comparison to white ethnic groups, older individuals from ethnic minorities are under‐represented as recipients of food aid. Thus, there are knowledge gaps in our understanding of older people and their experiences of food insecurity within ethnic minority communities. Through the theoretical lens of Individual and Community Resilience, we empirically advance our understanding of food security and resilience within South Asian communities via in‐depth interviews with community stakeholders and older individuals from Bangladeshi and Pakistani communities across the Greater Manchester region. Our findings reveal that the integration of temporal, environmental and social constructs within a resilience framework reveals significant potential for further negative social, cultural and economic impact on older ethnic minorities in the future, especially as current food support services do not appear to cater for ethnic dietary preferences, language accessibility and/or cultural norms regarding asking for help/charity outside the home. We predict therefore, in combination with the identified persistent stressors, that food insecurity issues within older ethnic minority communities are likely to get much worse, resulting in the need for extensive resilient capacities to cope with future cost‐of‐living challenges. In acknowledging previous limitations within previous resilience frameworks, we propose an incremental contribution to theory and conclude by identifying culturally and operationally appropriate food support system approaches, which can be used to address the increasing prevalence of “silent poverty” within ethnic minority communities. [ABSTRACT FROM AUTHOR]
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- 2024
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20. Crystal structure, magnetic and electrical transport properties of titanium-doped half-Heusler alloys Ni1−xTi<italic>x</italic>MnSb.
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Rutkauskas, A. V., Kichanov, S. E., Vershinina, T. N., Rymski, G. S., Dang, N. T., Hoang, T. P., Tran, T. A., Phan, N.-L., Tien, D. P. T., Thinh, P. D., and Khan, D. T.
- Abstract
Ni1−xTi
x MnSb polycrystalline alloys in the range 0≤x≤0.20 were synthesized employing the standard solid-phase synthesis method. The crystal, magnetic, as well as electrical properties of the alloys were investigated using neutron powder diffraction and magneto-resistance measurements. The results reveal that the substitution of Ti for Ni within the temperature range of 2.5–300 K does not induce alterations in the crystal and magnetic structures of NiMnSb. The ordered Ni magnetic moment approaches zero. The study of the electrical transport properties of the Ni1−xTix MnSb alloys, where 0≤x≤0.20, has demonstrated a half-metallic state at low temperatures and metallic conductivity for temperatures exceeding 160 K. A semiconductor state manifests at titanium concentrations ofx = 0.2 and was observed at temperatures below 21 K. The obtained experimental results are elucidated through first-principles theoretical calculations. [ABSTRACT FROM AUTHOR]- Published
- 2024
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21. GC-MS Assisted Determination of 26 Compounds in Phlomis Stewartii Extract Exhibiting Antioxidant, Antifungal, and Antibacterial Properties.
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Farooq A, Ali S, Ullah H, Khan A, Nawaz F, Farooq S, Sarwar A, Ali S, Khan D, Ullah R, and Iqbal S
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- Gas Chromatography-Mass Spectrometry, Antioxidants pharmacology, Antioxidants chemistry, Antioxidants isolation & purification, Anti-Bacterial Agents pharmacology, Anti-Bacterial Agents chemistry, Anti-Bacterial Agents isolation & purification, Antifungal Agents pharmacology, Antifungal Agents chemistry, Antifungal Agents isolation & purification, Plant Extracts chemistry, Plant Extracts pharmacology, Plant Extracts isolation & purification, Microbial Sensitivity Tests, Phlomis chemistry
- Abstract
Medicinal plants have long been studied for their therapeutic benifits. The present research aims to unveil complex phytochemical profile and therapeutic properties of ethyl acetate fraction of Phlomis stewartii, an important medicinal plant. In this context, the Gas Chromatography-Mass Spectrometry (GC-MS) analysis of the fraction identified 26 compounds. Additionally, the fraction exhibited concentration dependent antioxidant activity with an IC50 value lower than the standard antioxidant butylated hydroxytoluene. The antifungal activity of the fraction examined against F. oxysporum, A. alternate, and R. solani resulted in almost complete inhibition (>90 %) of fungal growth. Furthermore, the fraction exhibited significant antibacterial potential against B. subtilus, S. aureus, E. coli, and S. dysenteriae, with inhibition zones of 18±0.22, 17±0.22, 12±0.11, and 10±0.12, respectively. Briefly, the plant extract was found to be highly potent, particularly in its antifungal action. Further studies, including natural products isolation coupled with bioassays, are recommended for promising drug candidates discovery., (© 2024 Wiley-VHCA AG, Zurich, Switzerland.)
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- 2024
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22. Doxazosin Immediate Release as a Novel Treatment for Nightmares in Posttraumatic Stress Disorder.
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Khan D, Richardson C, and Forsberg M
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Nightmares and flashbacks are common debilitating symptoms of posttraumatic stress disorder (PTSD) that can disrupt daily functioning. Prazosin, an alpha-1 adrenergic antagonist, has been commonly used off-label for the treatment of these intrusion symptoms, although its short half-life makes it so that often multiple doses are needed. Doxazosin, another alpha-1 antagonist, is starting to be investigated in the treatment of PTSD-related nightmares due to its lesser side effect profile and longer half-life. In our case series, we present three cases of patients with PTSD-related nightmares who were successfully treated with doxazosin following a relapse of symptoms after discontinuation of prazosin for various reasons. The success of doxazosin immediate release for PTSD-related nightmares warrants further studies into its efficacy and use as an alternative treatment to prazosin., Competing Interests: The authors declare no conflicts of interest., (Copyright © 2024 Danyaal Khan et al.)
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- 2024
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23. Evidence generation throughout paediatric medicines life cycle: findings from collaborative work between European Medicines Agency (EMA) and EUnetHTA on use of extrapolation.
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Karres D, Pino-Barrio MJ, Benchetrit S, Benda N, Cochat P, Galluzzo S, García-Solís A, Gonzalez S, de Lisa R, Khan D, Lankester R, Lentz F, Martínez-Ortega PA, Montilla S, Morales DR, Tshinanu FM, Sánchez SP, Montero AR, Scherer S, Thomson A, Garrido BT, Umuhire D, Wang S, Bax R, and Hedberg N
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Drug development for children presents unique challenges and is highly regulated. Novel approaches, such as the use of extrapolation to address, for example, the need to avoid unethical studies, whilst supporting robust evidence generation have been developed in support of benefit/risk considerations by regulatory authorities. This is only one step in the decision-making process towards access, which in Europe also includes health technology assessment (HTA) bodies. Discussions related to evidentiary requirements in small populations using scientific evidence transfer have been identified as a priority action by European Medicines Agency/European Network for Health Technology Assessment 21 (EMA/EUnetHTA 21). We describe the outcome of this work and reflect on the discussions that had taken place on how to leverage prior knowledge through identifying and addressing uncertainties during life cycle management to support regulatory and HTA decision-making. Using examples, we explore the range of applications for evidence generation and offer regulatory and HTA insights on key design considerations for producing better evidence, reflecting our shared ambition. Early interactions with all respective stakeholders, particularly between regulators and HTA bodies are key to optimise data generation and utility in children. In Europe, the HTA regulation will offer opportunities for collaborations, which are important for all development efforts. We collaboratively explored the unique specific challenges relating to paediatric drug development, ethically and in its ability to leverage prior knowledge, as exemplified using extrapolation. Learnings from these offer opportunities to further develop methodology on how to leverage uncertainties across a product's life cycle for small populations generally., (© 2024 The Author(s). British Journal of Pharmacology published by John Wiley & Sons Ltd on behalf of British Pharmacological Society.)
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- 2024
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24. Detection of Real-Time Changes in Direction of COVID-19 Transmission Using National- and State-Level Epidemic Trends Based on R t Estimates - United States Overall and New Mexico, April-October 2024.
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Richard DM, Susswein Z, Connolly S, Myers Y Gutiérrez A, Thalathara R, Carey K, Koumans EH, Khan D, Masters NB, McIntosh N, Corbett P, Ghinai I, Kahn R, Keen A, Pulliam J, Sosin D, and Gostic K
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- Humans, United States epidemiology, New Mexico epidemiology, Basic Reproduction Number, Emergency Service, Hospital statistics & numerical data, Population Surveillance, Epidemics, Time Factors, COVID-19 epidemiology, COVID-19 transmission
- Abstract
Public health practitioners rely on timely surveillance data for planning and decision-making; however, surveillance data are often subject to delays. Epidemic trend categories, based on time-varying effective reproductive number (R
t ) estimates that use nowcasting methods, can mitigate reporting lags in surveillance data and detect changes in community transmission before reporting is completed. CDC analyzed the performance of epidemic trend categories for COVID-19 during summer 2024 in the United States and at the state level in New Mexico. COVID-19 epidemic trend categories were estimated and released in real time based on preliminary data, then retrospectively compared with final emergency department (ED) visit data to determine their ability to detect or confirm real-time changes in subsequent ED visits. Across the United States and in New Mexico, epidemic trend categories were an early indicator of increases in COVID-19 community transmission, signifying increases in COVID-19 community transmission in May, and a confirmatory indicator that decreasing COVID-19 ED visits reflected actual decreases in COVID-19 community transmission in September, rather than incomplete reporting. Public health decision-makers can use epidemic trend categories, in combination with other surveillance indicators, to understand whether COVID-19 community transmission and subsequent ED visits are increasing, decreasing, or not changing; this information can guide communications decisions., Competing Interests: All authors have completed and submitted the International Committee of Medical Journal Editors form for disclosure of potential conflicts of interest. Juliet Pulliam reports institutional support from the Bill and Melinda Gates Foundation, the Wellcome Trust, and the South Africa Department of Science and Innovation; consulting fees from the National Institute for Public Health and the Environment, the Netherlands; and membership on the Strategic Advisory Board for the Medical Research Council’s Centre for Global Infectious Disease Analysis, Imperial College, London. No other potential conflicts of interest were disclosed.- Published
- 2024
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25. Neutrophils extracellular traps myeloperoxidase and elastase predict cerebral vasospasms after aneurysmal subarachnoid hemorrhage.
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Sajjad S, Hewera M, Rana M, Gliem M, Fischer I, and Khan D
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Aneurysmal subarachnoid hemorrhage (aSAH) is a highly fatal and morbid disease. Despite successful coiling or clipping of a ruptured aneurysm, the patients suffer post-aSAH complications, including early brain injury, cerebral vasospasm (CVS), delayed cerebral ischemia (DCI), and systemic infections that mainly determine the clinical outcomes. Diagnostic biomarkers to predict accurately post-aSAH complications are needed. In this prospective exploratory study, we investigated the predictive value of neutrophil extracellular traps (NETs) components for CVS after aSAH. In the study, 62 patients with aSAH, 17 patients with unruptured cerebral aneurysms, and 12 healthy controls were included. The serum levels of myeloperoxidase (MPO), elastase (ELA), and citrullinated histone H3 (cH3) on day 1 and day 4 of hospital admission were measured with ELISA. Data were scaled using the Yeo-Johnson transformation. Values in two groups were compared using a t -test and in multiple groups using ANOVA. Logistic regression was used to model the outcome probability, including CVS, as the function of ELISA values. Among the patients with aneurysms, those who suffered aSAH had significantly higher levels of MPO (113.9 ± 294.4 vs. 422.3 ± 319.0 ng/ml, p < 0.05), ELA (84.8 ± 221.0 vs. 199.2 ± 218.9 ng/ml, p < 0.05), and cH3 (0.0 ± 0.0 vs. 2.8 ± 1.5, ng/ml, p < 0.05) on day one after aSAH, suggesting the involvement of NETs components in pathophysiology of aSAH and the events following aSAH. Individually, MPO and ELA levels taken on day 1 after SAH did not differ between patients with CVS and patients without CVS. However, when taken together into a logistic model, they allowed for predicting CVS with high sensitivity (91 %) and specificity (79 %). MPO and ELA, along with other clinical parameters, can be used as early predictors of CVS in aSAH patients and can serve as guidance during treatment decisions in the management of aSAH., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Authors. Published by Elsevier Ltd.)
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- 2024
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26. Tlx Promotes Stroke-Induced Neurogenesis and Neuronal Repair in Young and Aged Mice.
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Khan D, Bock D, Liu HK, and Muhammad S
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- Animals, Mice, Aging metabolism, Mice, Knockout, Male, Mice, Inbred C57BL, Infarction, Middle Cerebral Artery metabolism, Infarction, Middle Cerebral Artery pathology, Neurogenesis, Neural Stem Cells metabolism, Neural Stem Cells cytology, Stroke metabolism, Stroke pathology, Neurons metabolism, Receptors, Cytoplasmic and Nuclear metabolism, Receptors, Cytoplasmic and Nuclear genetics
- Abstract
Stroke is one of the leading causes of chronic disability in humans. It has been proposed that the endogenous neural stem/progenitor cells generate new neurons in the damaged area. Still, the contribution of these cells is negligible because a low number of newborn mature neurons are formed. Tlx conventional knock-out mice, Tlx -CreERT2 mice, and Tlx -overexpressing ( Tlx -OE) mice were specifically chosen for their unique genetic characteristics, which were crucial for the experiments. Permanent and transient middle cerebral artery occlusion was used to induce stroke in the mice. Immunostainings for doublecortin and GFP/BrdU/NeuN were performed to study neurogenesis and fate mapping. The rotarod test was performed to assess motor deficits. Here, we show that stroke-induced neurogenesis is dramatically increased with the additional expression of two copies of the nuclear receptor-coding gene tailless ( Tlx , also known as Nr2e1 ), which has been shown to be a master regulator of subventricular zone (SVZ) neural stem cells (NSCs). We show that Tlx expression is upregulated after stroke, and stroke-induced neurogenesis is blocked when Tlx is inactivated. Tlx overexpression in NSCs leads to massive induction of neurogenesis via stroke. More newborn mature neurons are formed in Tlx -overexpressing mice, leading to improved coordination and motor function recovery. Most importantly, we also demonstrate that this process is sustained in aged mice, where stroke-induced neurogenesis is nearly undetectable in wild-type animals. This study provides the first stem cell-specific genetic evidence that endogenous NSCs can be exploited by manipulating their master regulator, Tlx , and thus suggests a novel therapeutic strategy for neuronal repair.
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- 2024
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27. Pitfalls and challenges of peptide nucleic acid immobilisation on carbon surfaces for sequence-specific capturing of nucleic acid biomarkers.
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Meng X, Petrou L, Kenaan A, Khan D, O'Hare D, and Ladame S
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- Biomarkers analysis, Biomarkers chemistry, Humans, Surface Properties, Electrodes, Nucleic Acid Hybridization, DNA chemistry, Peptide Nucleic Acids chemistry, Biosensing Techniques methods, Carbon chemistry, Immobilized Nucleic Acids chemistry, Electrochemical Techniques methods
- Abstract
Nucleic acid sensors based on a peptide nucleic acid (PNA) probe have seen a surge in interest since their discovery in the 1990s, and after the patent protecting them expired in 2013. The appeal of PNA as capture and/or sensing probes as an alternative to standard DNA or RNA oligonucleotides originates from their superior chemical stability and affinity for complementary oligonucleotides, as well as their increased responsiveness to single base mismatches. The implementation of PNA probes onto optical and electrochemical sensors has showed great promise although progress has been hampered by issues mostly associated with surface chemistry, probe accessibility and non-specific binding. Herein, we report on a systematic comparison between various PNA immobilisation strategies on carbon substrates based on both covalent and non-covalent chemistries. Besides the use of standard electrochemical techniques to characterise the extent of surface modification, the ability of immobilised PNAs to engage in chemical interactions with freely diffusing molecules was also investigated. Using original chemical tags, this study provides a unique insight into the impact of immobilisation chemistries on PNA's (bio)availability. Rapid immobilisation of biotinylated PNA oligomers on screen-printed carbon electrode (SPCE) coated with adsorbed polystreptavidin (pSA) demonstrated highest efficiency and ease in the preparation process. An original nucleic acid sensor using this immobilisation chemistry is reported that is based on a sandwich assay between a surface bound PNA capture probe and a freely diffusing electrochemically active PNA sensing probe., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)
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- 2024
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28. Small area estimation of prostate-specific antigen testing in U.S. states and counties.
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Liu B, Pleis JR, Khan D, Parsons VL, Lee R, Cai B, Town M, Feuer EJ, and He Y
- Abstract
Background: In 2012, the U.S. Preventive Services Task Force (USPSTF) recommended against prostate cancer screening using the prostate-specific antigen (PSA) test for all age groups. In 2018 the USPSTF's recommendation shifted from a "D" (not recommended) to a "C" (selectively offering PSA-based screening based on professional judgment and patient preferences) in men ages 55-69. Limited reliable county-level prostate cancer screening data is available for cancer surveillance purposes., Methods: Utilizing data from the National Health Interview Survey (NHIS) and Behavioral Risk Factor Surveillance System (BRFSS) collected in 2012-2019, state- and county-level small area models were developed for estimating PSA testing. Model diagnosis, internal validation, and external validation examining associations of PSA testing and prostate cancer incidence were conducted., Results: Model-based estimates of PSA testing rate were produced for all U.S. states and 3,142 counties for two data periods: 2012-2016 and 2018-2019. Geographic variations across counties were demonstrated through maps. Moderate positive correlations between PSA-based screening and prostate cancer incidence were observed, for example, the state-level weighted Pearson's correlation coefficients were 0.5025 (p-value=0.0002) and 0.3691 (p-value=0.0077) for 2012-2016 and 2018-2019, respectively., Conclusions: These modeled estimates showed improved precision and adjusted for the differences between BRFSS and NHIS. The approach of combining NHIS and BRFSS utilized strengths of the larger sample size of BRFSS and generally higher response rates and better household coverage from the NHIS., Impact: The resulting small area estimates offer a valuable resource for the cancer surveillance community, aiding in targeted interventions, decision-making, and further research endeavors.
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- 2024
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29. Unveiling the potential of aluminum-decorated 3D phosphorus graphdiyne as a catalyst for N 2 O reduction.
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Ahmed S, Khan AA, Khan D, Ghani A, Ahmad R, Xiaoqing T, and Muhammad I
- Abstract
Interest in single-atom catalysts (SACs) has surged due to their potential to mitigate greenhouse N
2 O gas from the environment. In this study, we explore the potential of N2 O reduction using porous 3D phosphorus graphdiyne decorated with an Al atom (3D-Al/PGDYN) through density functional theory. Results confirm the energetic stability of Al decorations on 3D-PGDYN and indicate that the Al atom plays an active role in catalysis. The N2 O molecule undergoes spontaneous dissociation on the surface of the 3D-Al/PGDYN, initiating from the O-end, with a dissociation energy of -2.93 eV. In parallel, N2 O dissociation through the N-end involves chemisorption onto the 3D-Al/PGDYN surface, with an adsorption energy ( Ead ) of -1.74 eV. The negative Ead values (-2.47 and -2.64 eV) indicate that CO and O2 species chemisorb onto the 3D-Al/PGDYN surface, but these energies are lower than that of N2 O, suggesting that CO and O2 molecules do not hinder the N2 O reduction process. Furthermore, the reaction CO + O* → CO2 , which is vital for catalyst regeneration, proceeds swiftly on the 3D-Al/PGDYN catalyst with a low energy barrier of 0.11 eV, highlighting the catalyst's exceptional reactivity. This work holds significance in the design of catalysts and could be instrumental in developing new and efficient solutions for effectively removing harmful N2 O from the environment.- Published
- 2024
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30. Etiological Spectrum of Bone Marrow Biopsy in Patients With Pancytopenia.
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Ullah I, Khan D, and Qureshi V
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Background Pancytopenia is defined as a decrease in all three hematologic cell lines. The condition is not a disease in itself but a common pathway caused by various etiologies that can be infectious, autoimmune, genetic, nutritional, and/or malignant. Determining the cause of pancytopenia is a challenge and is key in determining the proper treatment regimen and estimating prognosis. Objective The aim of this study was to evaluate the etiological spectrum of pancytopenia in patients who underwent bone marrow biopsy at a tertiary care hospital. Methodology This study was conducted at the Internal Medicine and Gastroenterology Departments of Lady Reading Hospital, Peshawar, Pakistan, from January 1, 2023, to December 31, 2023. A total of 120 patients with pancytopenia aged 12 to 60 years who underwent bone marrow biopsy were enrolled. Data on age, gender, clinical presentations, and bone marrow biopsy findings were observed. Results The mean age was 34.97 years. Males were more frequently affected, 74 (61.7%), than females, 46 (38.3%). Pallor, 86 (71.7%), and weakness, 66 (55.0%), were the most frequent presentations of pancytopenia. The etiological spectrum showed that megaloblastic anemia was present in 48 (40%) of the cases, followed by infection-related changes in 20 (16.7%) and aplastic anemia in 20 (16.7%). Conclusion Megaloblastic anemia emerged as the leading cause of pancytopenia in our study, followed by aplastic anemia and infection-related changes., Competing Interests: Human subjects: Consent for treatment and open access publication was obtained or waived by all participants in this study. Institutional Review Board Medical Teaching Institute - Lady Reading Hospital Peshawar issued approval 280/LRH/MTI dated 15/12/2023. Approval has been granted to Dr Inayatullah, assistant professor, medicine, for the study titled "Etiological Spectrum of Bone Marrow Biopsy In Patients With Pancytopenia". Animal subjects: All authors have confirmed that this study did not involve animal subjects or tissue. Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work., (Copyright © 2024, Ullah et al.)
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- 2024
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31. Author Correction: Experimental study on the mechanical behavior of concrete incorporating fly ash and marble powder waste.
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Ghani A, Khan FA, Khan SW, Haq IU, Li D, Khan D, and Qureshi QBAIL
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- 2024
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32. Two-Dimensional ABS 4 (A and B = Zr, Hf, and Ti) as Promising Anode for Li and Na-Ion Batteries.
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Ahmed S, Muhammad I, Ghani A, Muhammad I, Ullah N, Raza N, Wang Y, Tian X, Wu H, and Khan D
- Abstract
Metal ion intercalation into van der Waals gaps of layered materials is vital for large-scale electrochemical energy storage. Transition-metal sulfides, ABS
4 (where A and B represent Zr, Hf, and Ti as monolayers as anodes), are examined as lithium and sodium ion storage. Our study reveals that these monolayers offer exceptional performance for ion storage. The low diffusion barriers enable efficient lithium bonding and rapid separation while all ABS4 phases remain semiconducting before lithiation and transition to metallic states, ensuring excellent electrical conductivity. Notably, the monolayers demonstrate impressive ion capacities: 1639, 1202, and 1119 mAh/g for Li-ions, and 1093, 801, and 671 mAh/g for Na-ions in ZrTiS4 , HfTiS4 , and HfZrS4 , respectively. Average voltages are 1.16 V, 0.9 V, and 0.94 V for Li-ions and 1.17 V, 1.02 V, and 0.94 V for Na-ions across these materials. Additionally, low migration energy barriers of 0.231 eV, 0.233 eV, and 0.238 eV for Li and 0.135 eV, 0.136 eV, and 0.147 eV for Na make ABS4 monolayers highly attractive for battery applications. These findings underscore the potential of monolayer ABS4 as a superior electrode material, combining high adsorption energy, low diffusion barriers, low voltage, high specific capacity, and outstanding electrical conductivity.- Published
- 2024
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33. Trends in brain MRI and CP association using deep learning.
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Hassan M, Lin J, Fateh AA, Zhuang Y, Lin G, Khan D, Mohammed AAQ, and Zeng H
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- Humans, Child, Brain diagnostic imaging, Child, Preschool, Female, Male, Infant, Deep Learning, Magnetic Resonance Imaging methods, Cerebral Palsy diagnostic imaging
- Abstract
Cerebral palsy (CP) is a neurological disorder that dissipates body posture and impairs motor functions. It may lead to an intellectual disability and affect the quality of life. Early intervention is critical and challenging due to the uncooperative body movements of children, potential infant recovery, a lack of a single vision modality, and no specific contrast or slice-range selection and association. Early and timely CP identification and vulnerable brain MRI scan associations facilitate medications, supportive care, physical therapy, rehabilitation, and surgical interventions to alleviate symptoms and improve motor functions. The literature studies are limited in selecting appropriate contrast and utilizing contrastive coupling in CP investigation. After numerous experiments, we introduce deep learning models, namely SSeq-DL and SMS-DL, correspondingly trained on single-sequence and multiple brain MRIs. The introduced models are tailored with specialized attention mechanisms to learn susceptible brain trends associated with CP along the MRI slices, specialized parallel computing, and fusions at distinct network layer positions to significantly identify CP. The study successfully experimented with the appropriateness of single and coupled MRI scans, highlighting sensitive slices along the depth, model robustness, fusion of contrastive details at distinct levels, and capturing vulnerabilities. The findings of the SSeq-DL and SMSeq-DL models report lesion-vulnerable regions and covered slices trending in age range to assist radiologists in early rehabilitation., Competing Interests: Declarations Conflict of interest As the corresponding author on behalf of all the authors, I declare that all the authors are aware of the submission and have no conflict of interest. The submitted paper contains original, unpublished results and is not currently under consideration elsewhere. Ethical permission The sample collection was carried out at Children’s Hospital with approval from the corresponding committee, with Reference No. 202004105. The recruited patients’ age range lies from 1 month to 17 years, with a mean age of 4.86 years. The guardian was notified with written consent to agree to conduct the study. All methods were performed per relevant guidelines and regulations., (© 2024. The Author(s).)
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- 2024
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34. Isochromophilones H-K, the new bioactive azaphilone derivatives isolated from fungal strain Diaporthe perseae associated with Pongamia pinnata plant.
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Niaz SI, Akram M, Ullah M, Safdar K, Amin A, Badshah S, Ali M, Alsaiari AA, Rehman KU, and Khan D
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- Pigments, Biological pharmacology, Pigments, Biological chemistry, Pigments, Biological isolation & purification, Anti-Bacterial Agents pharmacology, Anti-Bacterial Agents chemistry, Anti-Bacterial Agents isolation & purification, Molecular Structure, Inhibitory Concentration 50, Magnetic Resonance Spectroscopy, Anti-Infective Agents pharmacology, Anti-Infective Agents chemistry, Anti-Infective Agents isolation & purification, Bacteria drug effects, Mass Spectrometry, Benzopyrans pharmacology, Benzopyrans chemistry, Benzopyrans isolation & purification, Ascomycota chemistry, Microbial Sensitivity Tests, Hypoglycemic Agents pharmacology, Hypoglycemic Agents isolation & purification, Hypoglycemic Agents chemistry, Millettia chemistry
- Abstract
The phytochemical study of the Diaporthe species has revealed significant classes of mycotoxins and phomopsins. Dihydroanthracenone derivatives, chromanones and isochromophilones have also been isolated from Diaporthe sp. These findings led us to explore the Diaporthe perseae for phytochemical analysis that resulted in the isolation of four new compounds designated as isochromophilones H-K (1-4), alongside three previously identified metabolites. Using extensive spectroscopic investigations such as NMR, and Mass spectroscopy, their structures were elucidated. Furthermore, the antimicrobial and anti-diabetic potentials of all isolated compounds were assessed. Compounds 1-3 demonstrated significant antibacterial activity, while compounds 4-7 exhibited comparatively lower effectiveness than the reference antibiotics. Compounds 2-3 showed potent diabetic inhibition, displaying IC
50 values of 16.3 ± 0.3 and 25.4 ± 0.3, respectively. Compounds 1, 5, and 6 displayed mild anti-diabetic effects, with IC50 values of 56.5 ± 0.8, 37.6 ± 0.4, and 48.2 ± 0.6. However, compounds 4 and 7 were found least active., Competing Interests: Declaration of competing interest The author has no conflict of interest exits in the submission of this manuscript and the authors have complied with journal ethical requirements. Moreover, manuscript is approved by all authors as well as all the authorities acknowledged for publication., (Copyright © 2024 Elsevier Ltd. All rights reserved.)- Published
- 2024
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35. SISCOS in focal cortical dysplasia: localization and comparative analysis with MRI.
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Khan D, Sagar S, Jaleel J, Umar M, Tripathi M, Tripathi M, Sharma MC, and Bal C
- Subjects
- Humans, Female, Male, Adult, Adolescent, Child, Radiopharmaceuticals, Middle Aged, Organotechnetium Compounds, Drug Resistant Epilepsy diagnostic imaging, Drug Resistant Epilepsy surgery, Subtraction Technique, Child, Preschool, Cysteine analogs & derivatives, Sensitivity and Specificity, Focal Cortical Dysplasia, Magnetic Resonance Imaging methods, Malformations of Cortical Development diagnostic imaging, Malformations of Cortical Development surgery, Tomography, Emission-Computed, Single-Photon methods
- Abstract
Purpose: This study evaluates the efficacy of SISCOS (Subtraction ictal-interictal SPECT coregistered to SPECT) in localizing the epileptogenic zone (EZ) in focal cortical dysplasia (FCD), comparing its predictive performance with MRI and post-surgical outcomes based on ILAE classification., Methods: 84 patients with drug refractory epilepsy (DRE) who were operated and had histopathology consistent with FCD, were included in the study. All patients had undergone a complete work-up including SISCOS and MRI for EZ localization, followed by discussion in the multidisciplinary epilepsy surgery meeting prior to surgery. Ictal & interictal perfusion SPECT studies were performed with Tc-99 m Ethylene Cysteinate Dimer (Tc-99 m ECD) followed by SISCOS analysis using SPM2 and Bioimage Suite 2.6. Concordance for localization was determined by comparing with the surgical resection site and post-surgical outcomes were assessed using the ILAE classification., Results: The concordance for EZ localization demonstrated by SISCOS was 73.8% and MRI was 82.1%. 52 patients (61.9%) had good surgical outcome and 31(59%) of these were FCD type 2. In patients with discordant MRI findings, SISCOS was able to provide localisation in 86% (13/15), with 69.2% showing good surgical outcomes. Sensitivity of SISCOS and MRI was 73% (95% CI = 59-84.8%) and 78% (95% CI = 67.5-90.3%) respectively with no significant difference between the two. In FCD type I, both SISCOS and MRI revealed a similar a sensitivity of 76.4% (95%CI = 50.1-93.2%). Concordant cases exhibited higher seizure-free odds ratios for both modalities., Conclusion: SISCOS is effective in localizing the EZ in FCD patients, comparable to MRI. Integrating SISCOS and MRI enhances lesion detection, especially in MRI discordant cases. A comprehensive diagnostic approach utilizing SISCOS and MRI can optimize the non-invasive pre-surgical assessment in DRE thereby guiding surgical decision-making in a resource-limited setting., (© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
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- 2024
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36. Systemic C-Reactive Protein Predicts Cerebral Vasospasm and Delayed Cerebral Ischemia Following Aneurysmal Subarachnoid Hemorrhage: A Retrospective Observational Study.
- Author
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Li K, Khan D, Fischer I, and Muhammad S
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- Humans, Male, Female, Retrospective Studies, Middle Aged, Aged, Adult, Predictive Value of Tests, Subarachnoid Hemorrhage blood, Subarachnoid Hemorrhage complications, Vasospasm, Intracranial etiology, Vasospasm, Intracranial blood, C-Reactive Protein analysis, C-Reactive Protein metabolism, Brain Ischemia blood, Brain Ischemia etiology, Biomarkers blood
- Abstract
Background: Aneurysmal subarachnoid hemorrhage (aSAH) is often complicated by cerebral vasospasm (CVS) and delayed cerebral ischemia (DCI), which significantly impact patient outcomes. The study aimed to investigate the predictive value of systemic serum biomarker levels for CVS and DCI following aSAH., Methods: We retrospectively analyzed data for 450 aSAH patients admitted to University Hospital Düsseldorf between January 2011 and October 2021. Serum biomarkers were measured on admission. The occurrence of CVS and DCI was assessed based on clinical and radiological criteria. Multivariate logistic regression analysis was performed to determine the independent association of serum biomarkers with CVS and DCI. We compared the predictive values of various models using the area under the receiver operating characteristic curve., Results: Of the 450 patients, 126 (28.0%) developed CVS, 123 (27.3%) developed DCI, and 62 (13.8%) developed co-occurring CVS and DCI. Patients with CVS, DCI, or both had significantly higher admission C-reactive protein (CRP) levels than those without these complications (P < 0.001). Elevated CRP levels were independently associated with an increased risk of CVS, DCI, and co-occurring CVS and DCI (P < 0.05). CRP demonstrated a higher predictive value for CVS (area under the curve [AUC]: 0.811) and co-occurring CVS and DCI (AUC: 0.802) compared to DCI alone (AUC: 0.690)., Conclusions: Our findings suggest that admission systemic CRP levels can serve as a more valuable predictor for developing CVS than DCI following aSAH. Incorporating CRP into clinical assessments may aid in risk stratification and early intervention strategies for patients at high risk of these complications., (Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.)
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- 2024
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37. Imidazolium, pyridinium and pyrazinium based ionic liquids with octyl side chains as potential antibacterial agents against multidrug resistant uropathogenic E. coli .
- Author
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Hafeez S, Rasool Z, Hafeez S, Paracha RZ, Iqbal M, Khan D, and Adnan F
- Abstract
Urinary tract infections (UTIs) are the second most prevalent infectious disease with E. coli being the most common etiological agent behind these infections, affecting more than 150 million people globally each year. In recent decades, the emergence of multi-drug resistant (MDR) pathogens has rapidly escalated. To combat antimicrobial resistance (AMR), it is important to synthesize new biologically effective alternatives like ionic liquids (ILs) to control the bacterial infection and their spread. Ionic liquids are poorly coordinated organic salts characterized by melting points typically below 100 °C. The ability of ILs to form anionic and cationic interactions contributes to their versatile chemical, physical and biological attributes. In the present study, a total of 9 previously chemically synthesized and characterized ILs were used. For exploration of their antibacterial potential against the urinary tract infections (UTIs) caused by MDR Uropathogenic E. coli (UPEC) strains , in vitro and in vivo evaluation of ILs were performed. ILs showed pronounced zone of inhibition (ZOI), minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values of 29.5 mm, 3.81 μM and 5.08 μM by agar disk diffusion and broth micro-dilution methods, respectively. Scanning electron microscopy results depicted substantial morphological changes in UPEC biofilm formation ascertaining antibiofilm potential of tested ILs. Moreover, ILs showed exceptional antioxidant potential depicted by DPPH assay along with low cytotoxic effect toward mammalian cell lines (NB4), red blood cells and whole blood. Furthermore, the gene expression analysis results justified the antibacterial potential of ILs showing down-regulation of fimH, uvrY and up-regulation of csrA gene in UPEC after ILs treatment. In vivo dermal sensitivity assessment also established their non-cytotoxic behavior. In silico analysis validated these results, with the majority of the compounds exhibiting moderate to good absorption.Due to remarkable antibacterial and antioxidant potential and negligible cytoxicity, it could be inferred that ILs could serve as novel antimicrobial alternative agents in the treatment of UTIs., Competing Interests: Enclosed is the manuscript entitled “Imidazolium, Pyridinium and Pyrazinium based Ionic Liquids with Octyl side chains as Potential Antibacterial Agents against Multidrug Resistant Uropathogenic E. coli” for publication in your prestigious journal. With the submission of this manuscript I undertake that all the authors mentioned in this manuscript have no conflict of interest., (© 2024 Published by Elsevier Ltd.)
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- 2024
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38. The Shared Experience Actor-Critic (SEAC) Approach for Allocating Radio Resources and Mitigating Resource Collisions in 5G-NR-V2X Mode 2 Under Aperiodic Traffic Conditions.
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Aslam S, Khan D, and Chang K
- Abstract
5G New Radio (NR)-V2X, standardized by 3GPP Release 16, includes a distributed resource allocation Mode, known as Mode 2, that allows vehicles to autonomously select transmission resources using either sensing-based semi-persistent scheduling (SB-SPS) or dynamic scheduling (DS). In unmanaged 5G-NR-V2X scenarios, SB-SPS loses effectiveness with aperiodic and variable data. DS, while better for aperiodic traffic, faces challenges due to random selection, particularly in high traffic density scenarios, leading to increased collisions. To address these limitations, this study models the Cellular V2X network as a decentralized multi-agent networked Markov decision process (MDP), where each vehicle agent uses the Shared Experience Actor-Critic (SEAC) technique to optimize performance. The superiority of SEAC over SB-SPS and DS is demonstrated through simulations, showing that the SEAC with an N-step approach achieves an average improvement of approximately 18-20% in enhancing reliability, reducing collisions, and improving resource utilization under high vehicular density scenarios with aperiodic traffic patterns.
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- 2024
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39. Evaluation of asphalt mixtures modified with low-density polyethylene and high-density polyethylene using experimental results and machine learning models.
- Author
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Junaid M, Jiang C, Gazder U, Hafeez I, and Khan D
- Abstract
The widespread use of low-density polyethylene (LDPE) and high-density polyethylene (HDPE) plastics has resulted in a large amount of waste plastic that requires appropriate disposal or reuse. One potential solution is to use them in the modification of asphalt concrete (AC) mixtures for more sustainable highways. To study this possibility, permanent deformation and dynamic modulus (DM) of the LDPE and HDPE modified AC mixtures was investigated by conducting flow number (FN), flow time (FT) and DM tests on Superpave gyratory compacted specimens. Machine learning models; multi-layer perceptron (MLP), radial basis function neural network (RBFNN), generalized regression neural network (GRNN) and support vector machine (SVM) were used to predict the DM on the basis of frequency and temperature parameters. The model's performance was gauged by analyzing the root mean square error, mean relative error, and coefficient of determination. The study findings revealed that the LDPE and HDPE modified AC mixtures provide 2.07 times and 1.27 times better resistance to permanent deformation, respectively, than their counterpart. It was also found that the LDPE and HDPE modified AC mixtures have 2.1 times and 1.4 times higher DM values, respectively, than the Control AC mixtures. Among the machine learning models, MLP (R
2 = 0.98) showed best accuracy in predicting DM and thus is recommended to be used in similar studies due to its robustness. Additionally, the feature importance analysis revealed that frequency has the highest impact on DM predictions, followed by temperature and the inclusion of the LDPE., (© 2024. The Author(s).)- Published
- 2024
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40. CD9 and Aryl Hydrocarbon Receptor Are Markers of Human CD19+CD14+ Atypical B Cells and Are Dysregulated in Systemic Lupus Erythematous Disease.
- Author
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Blevins LK, Khan DMIO, Crawford RB, O'Neill C, Bach AP, Zhou J, Karmaus PW, Ang DC, Thapa R, and Kaminski NE
- Subjects
- Humans, Female, Biomarkers, Toll-Like Receptor 9 metabolism, Toll-Like Receptor 9 immunology, Adult, Male, Interleukin-8 metabolism, B-Lymphocyte Subsets immunology, Basic Helix-Loop-Helix Transcription Factors, Lupus Erythematosus, Systemic immunology, Receptors, Aryl Hydrocarbon genetics, Receptors, Aryl Hydrocarbon metabolism, Receptors, Aryl Hydrocarbon immunology, Tetraspanin 29, Antigens, CD19 immunology, Antigens, CD19 metabolism, Lipopolysaccharide Receptors metabolism, B-Lymphocytes immunology
- Abstract
Aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor whose expression regulates immune cell differentiation. Single-cell transcriptomic profiling was used to ascertain the heterogeneity of AHR expression in human B cell subpopulations. We identified a unique population of B cells marked by expression of AHR, CD9, and myeloid genes such as CD14 and CXCL8. Results were confirmed directly in human PBMCs and purified B cells at the protein level. TLR9 signaling induced CD14, CD9, and IL-8 protein expression in CD19+ B cells. CD14-expressing CD9+ B cells also highly expressed AHR and atypical B cell markers such as CD11c and TBET. In patients with active lupus disease, CD14+ and CD9+ B cells are dysregulated, with loss of CD9+ B cells strongly predicting disease severity and demonstrating the relevance of CD9+ B cells in systemic lupus erythematosus and autoimmune disease., (Copyright © 2024 by The American Association of Immunologists, Inc.)
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- 2024
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41. Mechanochemical forces regulate the composition and fate of stalled nascent chains.
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Khan D, Vinayak AA, Sitron CS, and Brandman O
- Abstract
The ribosome-associated quality control (RQC) pathway resolves stalled ribosomes. As part of RQC, stalled nascent polypeptide chains (NCs) are appended with CArboxy-Terminal amino acids (CAT tails) in an mRNA-free, non-canonical elongation process. CAT tail composition includes Ala, Thr, and potentially other residues. The relationship between CAT tail composition and function has remained unknown. Using biochemical approaches in yeast, we discovered that mechanochemical forces on the NC regulate CAT tailing. We propose CAT tailing initially operates in an "extrusion mode" that increases NC lysine accessibility for on-ribosome ubiquitination. Thr in CAT tails enhances NC extrusion by preventing formation of polyalanine, which can form α-helices that lower extrusion efficiency and disrupt termination of CAT tailing. After NC ubiquitylation, pulling forces on the NC switch CAT tailing to an Ala-only "release mode" which facilitates nascent chain release from large ribosomal subunits and NC degradation. Failure to switch from extrusion to release mode leads to accumulation of NCs on large ribosomal subunits and proteotoxic aggregation of Thr-rich CAT tails.
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- 2024
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42. Author Correction: Bio-oil modified binder derived from cotton stalks as an eco-friendly alternative binder for flexible pavements.
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Ullah S, Zaidi SBA, Khan D, Fareed A, Mohd Hasan MR, Milad A, and Ali B
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- 2024
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43. Multiple Synchronous Thoracoabdominal Duplication Cysts With Ectopic Gastric Mucosa Detected on 99mTc-Pertechnetate Scintigraphy and SPECT/CT.
- Author
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Wakankar R, Sagar S, Khan D, Dhiman A, and Kumar R
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- Humans, Abdomen diagnostic imaging, Choristoma diagnostic imaging, Cysts diagnostic imaging, Sodium Pertechnetate Tc 99m administration & dosage, Gastric Mucosa, Single Photon Emission Computed Tomography Computed Tomography
- Abstract
Abstract: Thoracoabdominal duplication cysts are a congenital malformation of the posterior primitive foregut with synchronous thoracic and abdominal duplication cysts being found in up to 15% of cases. The presentation of duplication cysts depends on their location, size, and other factors, like the presence of ectopic functioning gastric mucosa, which is reported in 20%-30% of duplication cysts. 99mTc-pertechnetate scintigraphy along with SPECT/CT helps in the preoperative localization of ectopic functioning gastric mucosa in these duplication cysts. We report the scintigraphic and SPECT/CT findings of one such case, which helped in the final diagnosis and management of the patient., Competing Interests: Conflicts of interest and sources of funding: none declared., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2024
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44. New PET Tracers for Symptomatic Myeloma.
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Sagar S, Khan D, Sivasankar KV, and Kumar R
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- Humans, Prognosis, Neoplasm Staging, Multiple Myeloma diagnostic imaging, Positron-Emission Tomography methods, Radiopharmaceuticals, Fluorodeoxyglucose F18
- Abstract
Multiple myeloma (MM) is a hematologic malignancy characterized by the clonal proliferation of plasma cells within the bone marrow. Accurate staging and monitoring of disease progression are crucial for effective management. PET imaging has emerged as a powerful tool in the diagnosis and management of MM, with radiotracers like 18F-fluorodeoxyglucose and novel agents playing a pivotal role. This review explores the current state of PET imaging in multiple myeloma, focusing on its role in initial staging, response assessment, and prognosis prediction, with an emphasis on recent advancements., (Copyright © 2024 Elsevier Inc. All rights reserved.)
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- 2024
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45. Mortality Surveillance for the COVID-19 Pandemic: Review of the Centers for Disease Control and Prevention's Multiple System Strategy.
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Khan D, Park M, Grillo P, Rossen L, Lyons BC, David S, Ritchey MD, Ahmad FB, McNaghten AD, Gundlapalli AV, and Suthar AB
- Subjects
- Humans, United States epidemiology, SARS-CoV-2, Population Surveillance methods, Pandemics prevention & control, Vital Statistics, Retrospective Studies, COVID-19 mortality, COVID-19 epidemiology, COVID-19 prevention & control, Centers for Disease Control and Prevention, U.S.
- Abstract
Mortality surveillance systems can have limitations, including reporting delays, incomplete reporting, missing data, and insufficient detail on important risk or sociodemographic factors that can impact the accuracy of estimates of current trends, disease severity, and related disparities across subpopulations. The Centers for Disease Control and Prevention used multiple data systems during the COVID-19 emergency response-line-level case‒death surveillance, aggregate death surveillance, and the National Vital Statistics System-to collectively provide more comprehensive and timely information on COVID-19‒associated mortality necessary for informed decisions. This article will review in detail the line-level, aggregate, and National Vital Statistics System surveillance systems and the purpose and use of each. This retrospective review of the hybrid surveillance systems strategy may serve as an example for adaptive informational approaches needed over the course of future public health emergencies. ( Am J Public Health . 2024;114(10):1071-1080. https://doi.org/10.2105/AJPH.2024.307743).
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- 2024
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46. Effects of imidazole derivatives on cellular proliferation and apoptosis in myeloid leukemia.
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Nadeem BB, Bibi A, Khan M, Sajjad GR, Adnan F, Ahmad Z, and Khan D
- Subjects
- Humans, Cell Line, Tumor, Antineoplastic Agents pharmacology, K562 Cells, Axl Receptor Tyrosine Kinase, Leukemia, Myelogenous, Chronic, BCR-ABL Positive drug therapy, Leukemia, Myelogenous, Chronic, BCR-ABL Positive pathology, Leukemia, Myelogenous, Chronic, BCR-ABL Positive genetics, Leukemia, Myelogenous, Chronic, BCR-ABL Positive metabolism, Receptor Protein-Tyrosine Kinases metabolism, Leukemia, Promyelocytic, Acute drug therapy, Leukemia, Promyelocytic, Acute pathology, Proto-Oncogene Proteins metabolism, Proto-Oncogene Proteins genetics, Leukemia, Myeloid drug therapy, Leukemia, Myeloid pathology, Leukemia, Myeloid metabolism, Leukemia, Myeloid genetics, Wnt Signaling Pathway drug effects, Imidazoles pharmacology, Apoptosis drug effects, Cell Proliferation drug effects
- Abstract
Background: Acute promyelocytic leukemia (APL) is the sub-type of Acute myeloid leukemia (AML) which is described by differentiation block at promyelocytic stage and t(15; 17) translocation with All trans retinoic acid (ATRA) and arsenic trioxide (ATO) as standard treatments. Chronic myeloid leukemia (CML) translocation t (19; 22) causes a rise in granulocytes and their immature precursors in the blood. Different mutations cause resistance to first-line tyrosine kinase therapies in CML. Beside drug resistance, leukemia stem cells (LSC) are critical resources for relapse and resistance in APL and CML. The drug toxicity and resistant profile associated with LSC and current therapeutics of APL and CML necessitate the development of new therapies. Imidazoles are heterocyclic nitrogen compounds with diverse cellular actions. The purpose of this research was to assess the anti-leukemic properties of four novel imidazole derivatives including L-4, L-7, R-35, and R-NIM04., Methods and Results: Pharmacological and biochemical approaches were used which showed that all four imidazole derivatives interfere with the NB4 cells proliferation, an APL cell line, while only L-7 exhibit anti-proliferative activity against K562 cells, a CML cell line. The anti-proliferative effect of imidazole derivatives was linked to apoptosis induction. Further real-time polymerase chain reaction (RT-PCR) analysis revealed downregulation of AXL-Receptor Tyrosine Kinase (AXL-RTK) and target genes of Wnt/beta-catenin pathway like c-Myc, Axin2 and EYA3. An additive effect was observed after combinatorial treatment of L-7 with standard drugs ATRA or Imatinib on the proliferation of NB4 and K562 cells respectively which was related to further downregulation of target genes of Wnt/beta catenin pathway., Conclusion: Imidazole derivatives significantly reduce proliferation of NB4 and K562 cells by inducing apoptosis, down regulating of AXL-RTK and Wnt/β-catenin target genes., (© 2024. The Author(s).)
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- 2024
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47. DiffFit: Visually-Guided Differentiable Fitting of Molecule Structures to a Cryo-EM Map.
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Luo D, Alsuwaykit Z, Khan D, Strnad O, Isenberg T, and Viola I
- Abstract
We introduce DiffFit, a differentiable algorithm for fitting protein atomistic structures into an experimental reconstructed Cryo-Electron Microscopy (cryo-EM) volume map. In structural biology, this process is necessary to semi-automatically composite large mesoscale models of complex protein assemblies and complete cellular structures that are based on measured cryo-EM data. The current approaches require manual fitting in three dimensions to start, resulting in approximately aligned structures followed by an automated fine-tuning of the alignment. The DiffFit approach enables domain scientists to fit new structures automatically and visualize the results for inspection and interactive revision. The fitting begins with differentiable three-dimensional (3D) rigid transformations of the protein atom coordinates followed by sampling the density values at the atom coordinates from the target cryo-EM volume. To ensure a meaningful correlation between the sampled densities and the protein structure, we proposed a novel loss function based on a multi-resolution volume-array approach and the exploitation of the negative space. This loss function serves as a critical metric for assessing the fitting quality, ensuring the fitting accuracy and an improved visualization of the results. We assessed the placement quality of DiffFit with several large, realistic datasets and found it to be superior to that of previous methods. We further evaluated our method in two use cases: automating the integration of known composite structures into larger protein complexes and facilitating the fitting of predicted protein domains into volume densities to aid researchers in identifying unknown proteins. We implemented our algorithm as an open-source plugin (github.com/nanovis/DiffFit) in ChimeraX, a leading visualization software in the field. All supplemental materials are available at osf.io/5tx4q.
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- 2024
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48. Exploration of Developmental Variants of Predatory Ladybird, Coccinella septumpunctata L. (Coleoptera: Coccinellidae) on an Artificial Diet.
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Siddiqui A, Shaizee, and Khan D
- Abstract
Introduction: This study aimed to focus on the identification, rearing, and exploration of developmental variants of the predatory ladybird, Coccinella septempunctata L., renowned for its efficacy as a biological control agent and its predation on agricultural pests. However, comprehensive knowledge concerning the occurrence and characteristics of developmental variants in this species remains limited., Method: In this study, through meticulous monitoring and exploration, we identified developmental variants exhibiting distinct sexual attributes, as well as survival rates., Result: The research outcomes enhance our understanding of the developmental variations within an egg batch of C. septempunctata., Conclusion: Moreover, the findings hold practical implications for the implementation of biological control strategies in agriculture, as specific variants may possess unique characteristics that enhance their effectiveness as natural enemies against pests., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
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- 2024
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49. Experimental study on the mechanical behavior of concrete incorporating fly ash and marble powder waste.
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Ghani A, Khan FA, Khan SW, Haq IU, Li D, Khan D, and Qureshi QBAIL
- Abstract
This research is focused on the development of an eco-friendly low-cost concrete using fly ash (FA) and marble powder waste (MPW) as partial replacements for cement and fine aggregate respectively. The substantial use of cement in concrete makes it expensive and contributes to global warming due to high carbon emissions. Thus, using such waste materials can help reduce the overall carbon footprint. For this purpose, various mix designs of concrete were developed by varying the percentages of FA and MPW. The concrete's fresh and hardened properties were experimentally determined for those mixes. The test results revealed that MPW as a sand substitute increases strength up to 40% and gradually decreases beyond that, but a 60% replacement still has more strength than the control specimen. Similarly, using FA as a cement replacement was found to reduce the strength, but the reduction was not very significant up to 20%. A mixed blend of FA and MPW showed superior results and maximum strength was obtained at F10M40. The optimal mix, with 10% FA and 40% MPW (F10M40), achieved a compressive strength of 4493.46 psi, a 16.21% improvement compared to the control mix proportion. Furthermore, the microstructure of the cementitious material was improved due to the pozzolanic reaction that led to a denser microstructure, as supported by the permeability test and SEM analysis., (© 2024. The Author(s).)
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- 2024
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50. Transcriptome Profiles Reveal Key Regulatory Networks during Single and Multifactorial Stresses Coupled with Melatonin Treatment in Pitaya ( Selenicereus undatus L.).
- Author
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Khokhar AA, Hui L, Khan D, You Z, Zaman QU, Usman B, and Wang HF
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- Gene Expression Profiling methods, Droughts, Antioxidants metabolism, Cadmium toxicity, Melatonin pharmacology, Gene Expression Regulation, Plant drug effects, Stress, Physiological genetics, Gene Regulatory Networks drug effects, Transcriptome, Cactaceae genetics, Cactaceae metabolism
- Abstract
In response to evolving climatic conditions, plants frequently confront multiple abiotic stresses, necessitating robust adaptive mechanisms. This study focuses on the responses of Selenicereus undatus L. to both individual stresses (cadmium; Cd, salt; S, and drought; D) and their combined applications, with an emphasis on evaluating the mitigating effects of (M) melatonin. Through transcriptome analysis, this study identifies significant gene expression changes and regulatory network activations. The results show that stress decreases pitaya growth rates by 30%, reduces stem and cladode development by 40%, and increases Cd uptake under single and combined stresses by 50% and 70%, respectively. Under stress conditions, enhanced activities of H
2 O2 , POD, CAT, APX, and SOD and elevated proline content indicate strong antioxidant defenses. We identified 141 common DEGs related to stress tolerance, most of which were related to AtCBP, ALA, and CBP pathways. Interestingly, the production of genes related to signal transduction and hormones, including abscisic acid and auxin, was also significantly induced. Several calcium-dependent protein kinase genes were regulated during M and stress treatments. Functional enrichment analysis showed that most of the DEGs were enriched during metabolism, MAPK signaling, and photosynthesis. In addition, weighted gene co-expression network analysis (WGCNA) identified critical transcription factors (WRKYs, MYBs, bZIPs, bHLHs, and NACs) associated with antioxidant activities, particularly within the salmon module. This study provides morpho-physiological and transcriptome insights into pitaya's stress responses and suggests molecular breeding techniques with which to enhance plant resistance.- Published
- 2024
- Full Text
- View/download PDF
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