326 results on '"Madan M"'
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2. Efficacy and Safety of Abrocitinib in Prurigo Nodularis and Chronic Pruritus of Unknown Origin: A Nonrandomized Controlled Trial
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Kwatra, Shawn G., Bordeaux, Zachary A., Parthasarathy, Varsha, Kollhoff, Alexander L., Alajmi, Ali, Pritchard, Thomas, Cornman, Hannah L., Kambala, Anusha, Lee, Kevin K., Manjunath, Jaya, Ma, Emily Z., Dillen, Carly, and Kwatra, Madan M.
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IMPORTANCE: Prurigo nodularis (PN) and chronic pruritus of unknown origin (CPUO) are chronic pruritic diseases that dramatically impair quality of life, but therapeutic options are limited. Abrocitinib, a Janus kinase 1 inhibitor, represents a promising therapy for both conditions. OBJECTIVE: To assess the efficacy and safety of 200-mg oral abrocitinib administered once daily in adults with moderate to severe PN or CPUO. DESIGN, SETTING, AND PARTICIPANTS: This phase 2, open-label, nonrandomized controlled trial conducted between September 2021 and July 2022 took place at a single center in the US. A total of 25 adult patients with moderate to severe PN or CPUO were screened. Ten patients with PN and 10 patients with CPUO were enrolled. All 20 patients completed the 12-week treatment period, 18 of whom completed the 4-week follow-up period. INTERVENTION: Abrocitinib, 200 mg, by mouth once daily for 12 weeks. MAIN OUTCOMES AND MEASURES: The primary efficacy end point was the percent change in weekly Peak Pruritus Numerical Rating Scale (PP-NRS) scores from baseline to week 12. Key secondary end points included the percentage of patients achieving at least a 4-point reduction in weekly PP-NRS score from baseline to week 12 and the percent change in Dermatology Life Quality Index (DLQI) scores. RESULTS: A total of 10 patients with PN (mean [SD] age, 58.6 [13.1] years; all were female) and 10 patients with CPUO (mean [SD] age, 70.7 [5.6] years; 2 were female) enrolled in the study. The mean (SD) baseline PP-NRS score was 9.2 (1.0) for PN and 8.2 (1.2) for CPUO. PP-NRS scores decreased by 78.3% in PN (95% CI, −118.5 to −38.1; P < .001) and 53.7% in CPUO (95% CI, −98.8 to −8.6; P = .01) by week 12. From baseline to week 12, 8 of 10 patients with PN and 6 of 10 patients with CPUO achieved at least a 4-point improvement on the PP-NRS. Both groups experienced significant improvement in quality of life as demonstrated by percent change in DLQI scores (PN: −53.2% [95% CI, −75.3% to −31.1%]; P = .002; CPUO: −49.0% [95% CI, −89.6% to −8.0%]; P = .02). The most common adverse event among patients was acneiform eruption in 2 of 20 patients (10%). No serious adverse events occurred. CONCLUSIONS AND RELEVANCE: The results of this nonrandomized controlled trial suggest that abrocitinib monotherapy may be effective and tolerated well in adults with PN or CPUO. Randomized, double-blind, placebo-controlled trials are warranted to validate these findings. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT05038982
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- 2024
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3. Fabrication of a photoacoustic cell and thermal diffusivity measurement of graphene oxide using photoacoustic spectroscopy
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Pramanik, Sumit, Datta, Shubhabrata, Cheralathan, M., Sarkar, Minarul I, Upadhyay, Madan M, and Kumar, Kaushal
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Photoacoustic spectroscopy (PAS) is an important technique for the characterization of materials by measuring the heat produced due to the non-radiative transitions. Here, the authors have fabricated a photoacoustic cell and made parametric studies to get maximum signal sensitivity. For the optimum signal, the cavity volume of the sample chamber is found to be 1.763 × 10–6m3. After optimization of the cell, the thermal diffusivity of hummers method synthesized graphene oxide (GO) powder was measured using laser excitation at 980 nm and it is found to ∼(1.84 ± 0.10) × 10–4m2/s. Also, the thermal diffusivity of the same sample was measured using 560 and 680 nm excitation wavelengths. No measurable change in thermal diffusivity with excitation wavelength is seen and it confirms that thermal diffusivity is independent of the excitation wavelength. Lastly, photoacoustic spectrum of the GO sample was measured in the 400–1200 nm range and compared with the spectrum of lamp black.
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- 2024
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4. Thermodynamic Assessment of Steelmaking Practices for the Production of Re-sulfur Steels
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Prithiv, T. S., Thirumurugan, G., Madan, M., and Kamaraj, Ashok
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FactSage has become one of the most important modeling tools in simulating the high-temperature metallurgical processes. The usefulness of the FactSage has been demonstrated in this work using several examples of steelmaking processes. Primary steelmaking (basic oxygen furnace) simulation was done with the available process data, and process charts similar to the standard ones were obtained. Ladle refining furnace process for free-cutting steels was simulated and it was observed that absolute non-equilibrium condition exists in steel during casting due to S injection. It was found that non-metallic inclusion formation is thermodynamically possible at final processing stages during Ca and S injection with variable recoveries. A significant change in the nature of non-metallic inclusions formed in re-sulfur steel causes clogging during continuous casting of liquid steel, and its influence on the process has been discussed, for mere 2 ppm of Ca difference in the liquid steel composition.
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- 2024
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5. Flow-Assisted Corrosion of API 5L X56 Steel: Effect of Flow Velocity and Dissolved Oxygen
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Meena, Lalit Kumar, Madan, M., Chaudhari, G P, and Singh, Raghuvir
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Flow-accelerated corrosion (FAC) is a complex mechanism of material degradation and depends upon the fluid hydrodynamic parameters, material microstructure and compositions, and environmental chemistry. The effect of flow velocity and dissolved oxygen on FAC behavior of API 5L X56 steels in 0.3 M NaCl solution is investigated. Electrochemical and weight loss measurements were taken in a closed-loop corrosion evaluation system at flow velocities of ~ 0.25, 1.0, 1.6, and 2.3 m/s and dissolved oxygen (DO) contents of ~ 50, 500, 1500, 2500, and 4500 ppb. The corrosion rate observed to increase with flow velocity and dissolved oxygen content. The post-corrosion topography and corrosion products were investigated using 3D profilometry, scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM–EDS), and Raman spectroscopy techniques. The corrosion products mainly contained hematite (α-Fe2O3), lepidocrocite (γ-FeOOH), goethite (α-FeOOH), and magnetite (Fe3O4). The wall shear stress (τ) induced on specimen surface was simulated through CFD approaches and correlated with corrosion resistance of the steel at different flow velocities.
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- 2024
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6. Modulation of Neuroimmune and Epithelial Dysregulation in Patients With Moderate to Severe Prurigo Nodularis Treated With Nemolizumab
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Deng, Junwen, Liao, Viviane, Parthasarathy, Varsha, Cornman, Hannah L., Kambala, Anusha, Kwatra, Madan M., Ständer, Sonja, Piketty, Christophe, Chaskar, Prasad, Krishnaswamy, Jayendra Kumar, Julia, Valerie, and Kwatra, Shawn G.
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IMPORTANCE: Prurigo nodularis (PN) is a debilitating skin disease characterized by intense pruritus and hyperkeratotic skin nodules. Nemolizumab, a monoclonal antibody targeting interleukin 31 receptor α, is a promising novel therapy for the treatment of moderate to severe PN. The biological mechanisms by which nemolizumab promotes improvement of itch and skin lesions in PN are unknown. OBJECTIVE: To characterize changes in plasma protein biomarkers associated with clinical response to nemolizumab in patients with PN. DESIGN, SETTING, AND PARTICIPANTS: This multicenter cohort study included patients recruited from Austria, France, Germany, Poland, and the US from a phase 2 clinical trial. Adults diagnosed with moderate to severe PN with severe pruritus for at least 6 months were included in the original trial. Patients in the nemolizumab group were included in the present study if they achieved at least a 4-point decrease in the Peak Pruritus Numerical Rating Scale (PP-NRS) from baseline to week 12 during nemolizumab treatment. Placebo controls did not experience a 4-point decrease in PP-NRS. Mass spectrometry with tandem mass tags to enrich skin-specific protein detection was used to characterize changes in plasma protein expression in nemolizumab and placebo groups. Data were collected from November 2, 2017, to September 26, 2018, and analyzed from December 6, 2019, to April 8, 2022. INTERVENTION: As part of the clinical trial, patients were treated with 3 doses of nemolizumab or placebo at 0, 4, and 8 weeks. MAIN OUTCOMES AND MEASURES: Changes in plasma and epidermal protein expression in nemolizumab-treated patients compared with the placebo group at 0, 4, and 12 weeks. RESULTS: Among the 38 patients included in the analysis (22 women and 16 men; mean [SD] age, 55.8 [15.8] years), enrichment analysis of canonical pathways, biological functions, and upstream regulators showed downregulation of terms involving inflammation (IL-6, acute-phase response, signal transducer and activator of transcription 3, and interferon γ), neural processes (synaptogenesis signaling and neuritogenesis), tissue remodeling and fibrosis (transforming growth factor β1 and endothelin-1), and epidermal differentiation (epithelial mesenchymal transition) in the plasma of nemolizumab group. CONCLUSIONS AND RELEVANCE: In this cohort study, differences between nemolizumab and placebo groups included modulation of inflammatory signaling, neural development, and epithelial differentiation, suggesting a promising potential approach for clinical management of PN.
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- 2023
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7. Identifying Anomalies of Systemic Venous Drainage: Systemic Venous Anomalies; Atrial Morphology
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Maddali, Madan M, Al Kindi, Hamood N, Kandachar, Pranav Subbaraya, Al Farqani, Abdulla, Al Alawi, Khalid S, Al Kindi, Faiza, Al-Maskari, Salim Nasser, Spicer, Diane E, and Anderson, Robert Henry
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So as to produce totally anomalous systemic venous connection, all of the systemic venous tributaries, along with the coronary sinus, should be connected with the morphologically left atrium. Previous descriptions of this rare constellation of anomalous connections of the systemic venous tributaries of the heart have been compromised by the inclusion of individuals having isomeric atrial appendages. In these settings, most frequently, the totally, or almost totally, anomalous systemic venous connections are associated with a sinus venosus defect. It is the anomalous pulmonary venous connections that then create a venovenous bridge, which permits the systemic venous tributaries to drain into the morphologically left atrium, even though they may be predominantly connected to the right atrium. More rarely, it is feasible for the primary atrial septum to develop so as to leave the systemic venous sinus in direct connection with the body of the morphologically left, rather than the morphologically right, atrium. We report a series of patients potentially falling into the category of anomalous systemic venous connections. The findings show a spectrum from partially to totally anomalous connections, with some better interpreted on the basis of anomalous drainage. Included in our cases, nonetheless, is an autopsied example of totally anomalous systemic venous connection produced by an abnormal location of the primary atrial septum. We discuss the potential morphogenesis for this finding. We emphasize the distinction that needs to be made between anomalous systemic venous connections and anomalous systemic venous drainage.
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- 2023
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8. Acoustic Identification of Dolphin Whistle Types in Deep Waters of Arabian Sea Using Wavelet Threshold Denoising Approach.
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MAHANTY, Madan M., CHEENANKANDY, Sanjana M., LATHA, Ganesan, RAGURAMAN, Govindan, and VENKATESAN, Ramasamy
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- 2023
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9. Patients undergoing multiple 18F-FDG PET/CT scans: frequency, clinical indications, and cumulative dose
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Abuqbeitah, Mohammad, Demir, Mustafa, Sönmezoğlu, Kerim, Sayman, Haluk, Kabasakal, Levent, Sağer, Sağit, Asa, Sertaç, Uslu-Beşli, Lebriz, and Rehani, Madan M.
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Objective: To assess frequency, clinical indications, and cumulative effective dose (CED) of patients undergoing multiple
18 F-FDG PET/CT imaging. Methods: Retrospective analysis of18 F-FDG PET/CT scans performed at a university hospital for 11 years was done. The effective dose was estimated from activity administered and dose-length-product. Results: A total of 55,42418 F-FDG PET/CT scans were performed in 32,658 patients. The average injected activity was 421 MBq and median 417 MBq. 24.2% of the patients were scanned 2–5 times in a year, 16.7% of them being unique patients (not counted as a separate patient in different years). The maximum PET/CT scans in a year for any patient was five. 23,571 (72.2%) patients underwent a single18 F-FDG PET/CT scan, while 9087 (27.8%) unique patients underwent 2–23 scans during 11 years. 82% of the scanned patients had a malignant disease, and 2.4% of patients with ≥ 218 scans in a year had non-malignant indications. 1.4% of patients received CED ≥ 100 mSv in one year from multiple18 F-FDG PET/CT scans and 0.8% of them received ≥ 100 mSv in a year more than one time, the CED of 27.8% (9087 patients) who underwent 2 to 2318 F-FDG PET/CT scans over 11-years ranged from 38 to 575 mSv (median: 271 mSv). Conclusion: This largest ever study covering analysis of 11-years’ data of18 F-FDG PET/CT patients showed that a sizeable number of patients, largely with malignant disease (82%) undergo recurrent imaging during one year and non-ignorable fraction exceed 100 mSv in one year.- Published
- 2023
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10. Lipid Nanocapsule: A Novel Approach to Drug Delivery System Formulation Development
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Kumar, Parveen, Yadav, Nishant, Chaudhary, Benu, Umakanthan, Srikant, Chattu, Vijay K., Kazmi, Imran, Al-Abbasi, Fahad A., Alzarea, Sami I., Afzal, Obaid, Altamimi, Abdulmalik S.A., Gupta, Gaurav, and Gupta, Madan M.
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Nanocapsules are polymeric nanoparticles encased in a polymeric coating composed of a predominantly non-ionic surfactant, macromolecules, phospholipids, and an oil core. Lipophilic drugs have been entrapped using various nanocarriers, including lipid cores, likely lipid nanocapsules, solid lipid nanoparticles, and others. A phase inversion temperature approach is used to create lipid nanocapsules. The PEG (polyethyleneglycol) is primarily utilised to produce nanocapsules and is a critical parameter influencing capsule residence time. With their broad drug-loading features, lipid nanocapsules have a distinct advantage in drug delivery systems, such as the capacity to encapsulate hydrophilic or lipophilic pharmaceuticals. Lipid nanocapsules, as detailed in this review, are surface modified, contain target-specific patterns, and have stable physical and chemical properties. Furthermore, lipid nanocapsules have target-specific delivery and are commonly employed as a marker in the diagnosis of numerous illnesses. This review focuses on nanocapsule synthesis, characterisation, and application, which will help understand the unique features of nanocapsules and their application in drug delivery systems.
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- 2023
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11. Spatial Mass Cytometry–Based Single-Cell Imaging Reveals a Disrupted Epithelial–Immune Axis in Prurigo Nodularis
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Patel, Jay, Deng, Junwen, Kambala, Anusha, Lee, Kevin K., Cornman, Hannah L., Parthasarathy, Varsha, Pritchard, Thomas, Chen, Shihua, Hernandez, Alexei G., Shin, Sarah, Oladipo, Olusola O., Kwatra, Madan M., Ho, Won Jin, and Kwatra, Shawn G.
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Prurigo nodularis (PN) is a chronic, inflammatory skin condition that disproportionately affects African Americans and features intensely pruritic, hyperkeratotic nodules on the extremities and trunk. PN is understudied compared with other inflammatory skin diseases, with the spatial organization of the cutaneous infiltrate in PN yet to be characterized. In this work, we employ spatial imaging mass cytometry to visualize PN lesional skin inflammation and architecture with single-cell resolution through an unbiased machine learning approach. PN lesional skin has increased expression of caspase 3, NF-kB, and phosphorylated signal transducer and activator of transcription 3 compared with healthy skin. Keratinocytes in lesional skin are subdivided into CD14+CD33+, CD11c+, CD63+, and caspase 3–positive innate subpopulations. CD14+ macrophage populations expressing phosphorylated extracellular signal–regulated kinase 1/2 correlate positively with patient-reported itch (P = .006). Hierarchical clustering reveals a cluster of patients with PN with greater atopy, increased NF-kB+ signal transducer and activator of transcription 3–positive phosphorylated extracellular signal–regulated kinase 1/2–positive monocyte-derived myeloid dendritic cells, and increased vimentin expression (P< .05). Neighborhood analysis finds interactions between CD14+ macrophages, CD3+ T cells, monocyte-derived myeloid dendritic cells, and keratinocytes expressing innate immune markers. These findings highlight phosphorylated extracellular signal–regulated kinase–positive CD14+ macrophages as contributors to itch and suggest an epithelial–immune axis in PN pathogenesis.
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- 2024
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12. Capturing Steam Energy Leaks in the Steam Distribution Network Using an Integreated Method: A Case Study of a Petroleum Refinery.
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Singh, Raghvendra Pratap, Sorte, M. B., and Jagtap, Madan M.
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- 2022
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13. Clinical Perspectives towards Improving Risk Stratification Strategy for Renal Transplantation Outcomes in Indian Patients.
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Kher, Vijay, Kute, Vivek B., Sahariah, Sarbeswar, Ray, Deepak S., Khullar, Dinesh, Guleria, Sandeep, Bansal, Shyam, Gang, Sishir, Bhalla, Anil Kumar, Prakash, Jai, Abraham, Abi, Shroff, Sunil, Bahadur, Madan M., Das, Pratik, Anandh, Urmila, Chaudhury, Arpita Ray, Singhal, Manoj, Kothari, Jatin, Raju, Sree Bhushan, and Pahari, Dilip Kumar
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EVALUATION of medical care ,GRAFT rejection ,HLA-B27 antigen ,KIDNEY transplantation ,IMMUNOSUPPRESSION ,RISK assessment ,SURVEYS ,IMMUNOSUPPRESSIVE agents ,BODY mass index ,ORGAN donors ,EVALUATION - Abstract
Graft loss and rejections (acute/chronic) continue to remain important concerns in long-term outcomes in kidney transplant despite newer immunosuppressive regimens and increased use of induction agents. Global guidelines identify the risk factors and suggest a framework for management of patients at different risk levels for rejection; however, these are better applicable to deceased donor transplants. Their applicability in Indian scenario (predominantly live donor program) could be a matter of debate. Therefore, a panel of experts discussed the current clinical practice and adaptability of global recommendations to Indian settings. They also took a survey to define risk factors in kidney transplants and provide direction toward evidence- and clinical experience-based risk stratification for donor/recipient and transplant-related characteristics, with a focus on living donor transplantations. Several recipient related factors (dialysis, comorbidities, and age, donor-specific antibodies [DSAs]), donor-related factors (age, body mass index, type -- living or deceased) and transplantation related factors (cold ischemia time [CIT], number of transplantations) were assessed. The experts suggested that immunological conflict should be avoided by performing cytotoxic cross match, flow cross match in all patients and DSA-(single antigen bead) whenever considered clinically relevant. HLA mismatches, presence of DSA, along with donor/recipient age, CIT, etc., were associated with increased risk of rejection. Furthermore, the panel agreed that the risk of rejection in living donor transplant is not dissimilar to deceased donor recipients. The experts also suggested that induction immunosuppression could be individualized based on the risk stratification. [ABSTRACT FROM AUTHOR]
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- 2022
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14. Establishment of national diagnostic reference levels for percutaneous coronary interventions (PCIs) in Thailand.
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Srimahachota, Suphot, Krisanachinda, Anchali, Roongsangmanoon, Worawut, Sansanayudh, Nakarin, Limpijankit, Thosaphol, Chandavimol, Mann, Athisakul, Siriporn, Siriyotha, Sukanya, and Rehani, Madan M.
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• A large study of 22,737 Percutaneous coronary interventions in 76 Cath labs. • Established diagnostic reference level for lesions of different complexities. • Type C lesions found to have significantly higher doses than type B or A lesions. • Trans-radial approach showed lower doses than transfemoral approach. To establish national diagnostic reference levels (DRLs) for percutaneous coronary intervention (PCI) in Thailand for lesions of different complexity. Radiation dose quantity as kerma-area-product (KAP) and cumulative air-kerma at reference point (CAK) from 76 catheterization labs in 38 hospitals in PCI registry of Thailand was transferred online to central data management. Sixteen months data (May 2018 to August 2019) was analyzed. We also investigated role of different factors that influence radiation dose the most. Analysis of 22,737 PCIs resulted in national DRLs for PCI of 91.3 Gy.cm
2 (KAP) and 1360 mGy (CAK). The NDRLs for KAP for type C, B2, B1 and A lesions were 106.8, 82.6, 67.9, and 45.3 Gy.cm2 respectively and for CAK, 1705, 1247, 962, and 790 mGy respectively. Thus, as compared to lesion A, lesion C had more than double the dose and B2 had nearly 1.6 times and B1 had 1.2 times CAK. Our DRL values are lower than other Asian countries like Japan and Korea and are in the middle range of Western countries. University hospital had significantly higher dose than private or public hospital possibly because of higher load of complex procedures in university hospitals and trainees performing the procedures. Transradial approach showed lower doses than transfemoral approach. This large multi-centric study established DRLs for PCIs which can act as reference for future studies. A hallmark of our study is establishment of reference levels for coronary lesions classified as per ACC/AHA and thus for different complexities. [ABSTRACT FROM AUTHOR]- Published
- 2022
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15. Active Pharmacovigilance for Primaquine Radical Cure of Plasmodium vivax Malaria in Odisha, India.
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Anvikar, Anupkumar R., Sahu, Prajyoti, Pradhan, Madan M., Sharma, Supriya, Ahmed, Naseem, Yadav, Chander P., Pradhan, Sreya, Duparc, Stephan, Daumerie, Penny Grewal, and Valecha, Neena
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- 2022
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16. Consumers’ willingness-to-pay for newly developed U.S. farm-raised convenient catfish products: A consumer-based survey study
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Gosh, Kamal, Deb, Uttam, and Dey, Madan M.
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AbstractAccurately measuring willingness-to-pay (WTP) for newly developed food products is critical for academicians and marketing managers. This study measures consumers’ preference and WTP for five newly developed convenient (ready-to-cook) catfish products by surveying 128 participants from Arkansas and Florida. An ordered probit model was applied to survey data to investigate factors influencing consumers’ WTP. Results indicated that the surveyed participants preferred all the inspected products as their WTP was ranged between average and high. The significant variables affecting the participants’ WTP include product appearance, eagerness to buy, preference ranking, preferred form, and consumption pattern. The consumer’s WTP was significantly correlated with the participant’s gender, age, race, and for some groups, income.
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- 2022
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17. Dynamics of price volatility spillover in the U.S. catfish market
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Surathkal, Prasanna, Dey, Madan M., and Sudhakaran, Pratheesh Omana
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AbstractThe U.S. catfish aquaculture industry is arguably one of the earliest aquaculture segments in the world to industrialize, and a pioneer in demonstrating the benefits of innovation-driven aquaculture supply chain development over wild-harvested fisheries. However, the industry substantially contracted through the 2003–2013 period. High and volatile feed prices, volatile farm prices, a rapid surge in low-priced imports, and a strict regulatory compliance burden on a maturing industry are thought to be some of the major factors causing this decline. We analyze the price volatility spillovers in the U.S. catfish industry and the related feed/feed ingredient markets. Our empirical model is the multivariate generalized autoregressive conditional heteroscedasticity (GARCH) model allowing for cross-market and own-market impacts from shocks and volatilities in prices. Our results indicate bidirectional spillovers among catfish market prices and most of the feed ingredient prices.
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- 2022
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18. Dupilumab Therapy Modulates Circulating Inflammatory Mediators in Patients with Prurigo Nodularis
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Bao, Aaron, Ma, Emily, Cornman, Hannah, Kambala, Anusha, Manjunath, Jaya, Kollhoff, Alexander L., Imo, Brenda Umenita, Kwatra, Madan M., and Kwatra, Shawn G.
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Prurigo nodularis (PN) is a chronic inflammatory skin disease characterized by intense pruritus and skin nodules. Beyond the skin, PN involves circulating blood inflammation that may contribute to systemic disease comorbidities. Dupilumab was recently approved for treatment of PN, but its effects on systemic inflammation are unknown. Thus, we aimed to characterize changes in plasma concentrations of inflammatory proteins after dupilumab treatment. In this exploratory study, plasma samples were collected from 3 patients with moderate-to-severe PN before and after ≥6 months of dupilumab treatment. All patients exhibited clinically significant improvements after treatment. Of the 2569 proteins tested, 186 were differentially expressed after treatment (q < 0.1, fold change > 1.3). Downregulated proteins included cytokines associated with T helper (Th) 1 (IFN-γ, TNF-α), Th2 (IL-4, IL-13), and Th17/Th22 (IL-6, IL-22) signaling. Markers of innate immunity (IL-19, toll-like receptor 1, nitric oxide synthase 2), immune cell migration (CCL20, CD177), and fibrosis (IL-11, IL-22) were also decreased (q < 0.1). Gene set variation analysis of Th2, Th17, and epithelial–mesenchymal transition gene sets showed reduced pathway expression in the post-treatment cohort (P< .05). Plasma cytokine levels of IL-11, nitric oxide synthase 2, IL-13, IL-4, and IFNG (R2> 0.75, q < 0.10) showed the strongest correlations with pruritus severity. Dupilumab may reduce systemic inflammatory proteins associated with multiple immune and fibrosis pathways in patients with PN, potentially modulating the development of systemic disease comorbidities.
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- 2024
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19. Capturing Steam Energy Leaks in the Steam Distribution Network Using an Integreated Method: A Case Study of a Petroleum Refinery
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Singh, Raghvendra Pratap, Sorte, M. B., and Jagtap, Madan M.
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In Petroleum Refineries, the financial impact due to steam energy leakage is negligible compared to the hourly production disruption. Thus, the steam leak jobs are given less priority than production optimization. However, fuel consumption and environmental impact due to steam leaks lead to new awareness. In a typical Petroleum Refinery, steam energy consumption is about 30% of the total energy mix. The several reports published on steam trap performance evaluation indicate that around 20% of the steam generated in a boiler unit is lost via leaking traps in the steam distribution network (U.S. Department of Energy, Advanced technologies for evaluating the performance of steam traps, federal energy management program). The steam distribution network’s overall effectiveness is vital for Refineries operations, safety, and product yield. The Refineries need proactive methods to minimize steam energy losses via the distribution network. The replacement of defective steam traps with identical ones based on periodic audit reports would not be the best option because of existing pipeline corrosion or previous water hammer effects, or both on the steam traps and pipelines. This paper presents an integrated method to maintain the overall effectiveness of a steam distribution network in a Petroleum Refinery. The integrated methodology consists of correct steam trap installation along with regular preventive maintenance of the steam network. This case study focused on frequent monitoring of high capacity traps and the root cause failure analysis of steam network elements. Finally, evaluation of the overall effectiveness of the steam distribution network has been done as per UNFCCC guidelines (CDM Executive Board, Rev to approved baseline methodology AM0017/Version 02, 22, 2005).
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- 2022
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20. Failure Analysis of a Cracked Hydrogen Reformer Tube
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Raghavendra, K., Venkatesh, V., Madan, M., Sujata, M., and Bhaumik, S. K.
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The paper presents analysis of failure in a reformer tube used for hydrogen generation in a petro-chemical industry. The tube, which was manufactured by centrifugal casting of Nb-modified 25Cr35Ni alloy, developed a longitudinal crack of 200 mm length after 61,500 h of service against a design life of 100,000 h. Microstructural studies on the damaged tube material revealed presence of innumerable number of small planar cracks aligned parallel to the main crack. The damages in the material include formation of voids and cracks around the carbide particles at inter-dendritic regions. The microstructural changes observed in the tube material are typical of creep damage in 25Cr35Ni alloy. Study revealed that coalescence of voids led to the formation of small cracks and these cracks grew predominantly in radial directions in the bulk of the tube-wall. Some of the localized cracks joined to form a major crack in the longitudinal direction of the tube. Through microstructural studies, it was established that the failure in the reformer tube occurred due to exposure to temperatures higher than the safe operating temperature for a prolonged period of time.
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- 2022
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21. Impact of equipment technology on reference levels in fluoroscopy-guided gastrointestinal procedures.
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Rehani, Madan M. and Li, Xinhua
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• Radiation dose for the same procedure varies 2 to 12 times, depending on equipment. • Fluoroscopic time is similar and thus insensitive. • We recommend technology-based reference levels for each procedure. • This study provides reference levels for 4 endoscopic procedures on 3 machines. To evaluate the effect of equipment technology on reference point air kerma (K a,r), air kerma-area product (P KA), and fluoroscopic time for fluoroscopically-guided gastrointestinal endoscopic procedures and establish benchmark levels. This retrospective study included the consecutive patients who underwent fluoroscopically-guided gastrointestinal endoscopic procedures from May 2016 to August 2023 at a tertiary care hospital in the U.S. Fluoroscopic systems included (a) Omega CS-50 e-View, (b) GE Precision 500D, and (c) Siemens Cios Alpha. Radiation dose was analyzed for four procedure types of endoscopic retrograde biliary, pancreas, biliary and pancreas combined, and other guidance. Median and 75th percentile values were computed using software package R (version 4.0.5, R Foundation). This large study analyzed 9,459 gastrointestinal endoscopic procedures. Among four procedure types, median K a,r was 108.8–433.2 mGy (a), 70–272 mGy (b), and 22–55.1 mGy (c). Median P KA was 20.9–49.5 Gy∙cm
2 (a), 13.4–39.7 Gy∙cm2 (b), and 8.91–20.9 Gy∙cm2 (c). Median fluoroscopic time was 2.8–8.1 min (a), 3.6–9.2 min (b), and 2.9–9.4 min (c). Their median value ratio (a:b:c) was 8.5:4.8:1 (K a,r), 2.7:2.1:1 (P KA), and 1.0:1.1:1 (fluoroscopic time). Median value and 75th percentile are presented for K a,r , P KA , and fluoroscopic time for each procedure type, which can function as benchmark for comparison for dose optimization studies. This study shows manifold variation in doses (K a,r and P KA) among three fluoroscopic equipment types and provides local reference levels (50th and 75th percentiles) for four gastrointestinal endoscopic procedure types. Besides procedure type, imaging technology should be considered for establishing diagnostic reference level. With manifold (2 to 12 times) variation in doses observed in this study among 3 machines, we recommend development of technology-based diagnostic reference levels for gastrointestinal endoscopic procedures. [ABSTRACT FROM AUTHOR]- Published
- 2024
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22. The International Organization for Medical Physics – a driving force for the global development of medical physics
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Rehani, Madan M., Damilakis, John, Bezak, Eva, Duhaini, Ibrahim, Tabakov, Slavik, Ibbott, Geoffrey, Pipman, Yakov, Renha, Simone Kudlulovic, Chougule, Arun, Russo, Paolo, and Stoeva, Magdalena
- Abstract
The International Organization for Medical Physics (IOMP) is the world’s largest professional organization in the field of medical physics and has official non-governmental organization status with the World Health Organization (WHO) and the International Atomic Energy Agency (IAEA). IOMP is charged with a mission to advance medical physics practice worldwide by disseminating scientific and technical information, fostering the educational and professional development of medical physics and promoting the highest quality medical services for patients. IOMP’s activities are directed towards the promotion of medical physics globally, improving patient care, and contributing to the benefit of healthcare to the society. Major organizational activities include but are not limited to scientific events, international collaborations, dissemination of information, education, training, and research. For nearly 60 years of existence, IOMP turned into a key factor not only in the field of medical physics, but also healthcare, and other related disciplines. IOMP is looking forward to future perspectives in international collaboration and enhancement of the professional skills, all directed towards enhancing patient benefit.
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- 2022
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23. Sleep disturbance in adults with chronic pruritic dermatoses is associated with increased C-reactive protein levels.
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Patel, Sagar P., Khanna, Raveena, Choi, Justin, Williams, Kyle A., Roh, Youkyung S., Hong, Michael S., Sutaria, Nishadh H., Pritchard, Thomas, Kwatra, Madan M., and Kwatra, Shawn G.
- Abstract
Background: Pruritus is a common symptom that can significantly reduce quality of life through sleep disruption.Objective: To examine features of disturbed sleep in patients with chronic pruritic dermatoses and test the hypothesis that systemic inflammation may serve as a biomarker for impaired sleep in these patients.Methods: Cross-sectional analysis of the National Health and Nutrition Examination Survey investigating systemic inflammation using C-reactive protein (CRP) levels. Logistic regression was used to compare patients with and without sleep disturbances, adjusting for demographics (model 1) and medical comorbidities (model 2).Results: Chronic pruritic dermatoses were associated with multiple sleep disturbances, including nighttime awakenings (model 1: odds ratio [OR], 1.646; 95% confidence interval [CI], 1.031-2.627; model 2: OR, 1.329; 95% CI, 0.888-1.989) and early morning awakening (model 1: OR, 1.669, 95% CI, 1.118-2.493; model 2: OR, 1.582; 95% CI, 1.008-2.481). Mean CRP levels were 52.8% higher among patients with pruritic dermatoses reporting trouble sleeping compared with those who did not (0.663 vs 0.434 mg/dL; P = .034). Trouble sleeping was also positively correlated with CRP levels (β = 0.142, P = .025).Limitations: Potential recall bias among participants.Conclusions: In addition to confirming sleep disturbances with pruritic dermatoses, we found these disturbances are more likely to present with elevated CRP levels. Clinicians should consider the potential risk for sleep-related and cardiac comorbidities in patients diagnosed with itchy skin conditions. [ABSTRACT FROM AUTHOR]- Published
- 2021
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24. Effective dose from radiation exposure in medicine: Past, present, and future.
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Martin, Colin J., Harrison, John D., and Rehani, Madan M.
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• Effective dose (E) provides a measure of potential risk in terms of health detriment. • E is calculated as a risk-weighted average of organ doses. • E is applied to a reference person, but patient-specific calculations can be done. • E is useful as a guide in making everyday decisions about patient imaging. • E should be derived using the most up-to-date phantoms and weighting factors. Effective dose (E) has been developed by the International Commission on Radiological Protection (ICRP) as a dose quantity with a link to risks of health detriment, mainly cancer. It is based on reference phantoms representing average individuals, but this is often forgotten in its application to medical exposures, for which its use sometimes goes beyond the intended purpose. There has been much debate about issues involved in the use of E in medicine and ICRP is preparing a publication with more information on this application. This article aims to describe the development of E and explain how it should be used in medicine. It discusses some of the issues that arise when E is applied to medical exposures and provides information on how its use might evolve in the future. The article concludes with responses to some frequently asked questions about uses of E that are in line with the forthcoming ICRP publication. The main use of E in medicine is in meaningful comparison of doses from different types of procedure not possible with measurable dose quantities. However, it can be used, with appropriate care, as a measure of possible cancer risks. When considering E to individual patients, it is important to note that the dose received will differ from that assessed for reference phantoms, and the risk per Sv is likely to be greater on average in children and less in older adults. Newer techniques allow the calculation of patient-specific E which should be distinguished from the reference quantity. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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25. Higher patient doses through X-ray imaging procedures.
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Rehani, Madan M. and Nacouzi, David
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• Patient doses in the range of a few tens of mSv are not uncommon. • Cumulative doses from multiple X-ray procedures may lead to doses over 100 mSv. • Lack of optimization by users despite better technology is important contributor. • Technological solutions are showing great promise for the future. • One important advance that is coming up is that of monochromatic X-ray source. Medical imaging using X-rays has been one of the most popular imaging modalities ever since the discovery of X-rays 125 years ago. With unquestionable benefits, concerns about radiation risks have frequently been raised. Computed tomography (CT) and fluoroscopic guided interventional procedures have the potential to impart higher radiation exposure to patients than radiographic examinations. Despite technological advances, there have been instances of increased doses per procedure mainly because of better diagnostic information in images. However, cumulative dose from multiple procedures is creating new concerns as effective doses >100 mSv are not uncommon. There is a need for action at all levels. Manufacturers must produce equipment that can provide a quality diagnostic image at substantially lesser dose and better implementation of optimization strategies by users. There is an urgent need for the industry to develop CT scanners with sub-mSv radiation dose, a goal that has been lingering. It appears that a new monochromatic X-ray source will lead to replacement of X-ray tubes all over the world in coming years and will lead to a drastic reduction in radiation doses. This innovation will impact all X-ray imaging and will help dose reduction. For interventional procedures, the likely employment of robotic systems in practice may drastically reduce radiation exposures to operators- but patient exposure will still remain an issue. Training needs always need to be emphasized and practiced. [ABSTRACT FROM AUTHOR]
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- 2020
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26. Estimates of the number of patients with high cumulative doses through recurrent CT exams in 35 OECD countries.
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Rehani, Madan M. and Hauptmann, Michael
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• Estimates were made of number of patients likely receiving cumulative effective dose ≥100 mSv in 5-years from CT exams. • It results in about 2.5 million patients in 35 OECD countries. • Countries were classified into Low: 0 to <1, Medium: 1 to <2 and High: ≥2 patients with CED ≥ 100 mSv/1000 population. • There are 2 countries in Low, 24 in medium and 9 in high number group. • Stake holders in patient radiation safety should attend to the issue of high doses to such large number of patients. To estimate the number of patients in OECD (Organization for Economic Co-operation and Development) countries who receive a cumulative effective dose (CED) ≥ 100 mSv from recurrent computed tomography (CT) exams. Taking into account recently published data on the number of CTs per patient and the fraction of patients with CED ≥ 100 mSv as well as country-specific data for the number of CT exams/1,000 population from OECD publication, this paper makes estimations for 35 OECD countries. The estimated total number of patients with CED ≥ 100 mSv for all 35 OECD countries combined in a 5-year period is around 2.5 million (2,493,685) in a population of 1.2 billion (1,176,641,900), i.e., 0.21% of the population. Expressed per 1,000 population, the range is from 0.51 for Finland to 2.94 for the US, a nearly six-fold difference. Countries with more than 2 patients with CED ≥ 100 mSv in a 5-yr period per 1,000 population are: Belgium, France, Iceland, Japan, Korea, Luxembourg, Portugal, Turkey, and US. The first estimates of the number of patients likely receiving CED ≥ 100 mSv through recurrent CT exams in 35 OECD countries indicate that 2.5 million patients reach this level in a 5-year period. There is an urgent need for various stakeholders including medical physicists, referring physicians, health policy makers, manufacturers of CT equipment and epidemiologists to attend to the issue in the interest of patient radiation safety. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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27. Hydroxyapatite-Coated Femoral Stems in Primary Total Hip Arthroplasty: An Updated Meta-Analysis.
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Kim, William T., Woodruff, Robert, Kalore, Niraj V., Vallem, Madan M., Cyrus, John W., Krumme, John W., Patel, Nirav K., and Golladay, Gregory J.
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Most primary total hip arthroplasties (THAs) performed in the United States utilize cementless fixation with porous or hydroxyapatite (HA) coating. A previous meta-analysis comparing HA-coated versus non–HA-coated stems in primary THA published in 2013 found no significant difference between the 2. However, an updated analysis of the current literature is needed to assess the potential benefit of HA-coated stems in primary THA. Various libraries were searched through May 2022 according to Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) guidelines. Studies included were randomized controlled trials comparing HA-coated femoral stems to non–HA-coated stems in primary THA. Outcomes included Harris Hip Score (HHS), endosteal bone formation, radiolucent lines, linear wear rate, revision for aseptic loosening, thigh pain, and heterotopic ossification. There were significantly fewer revisions for aseptic loosening (P =.004) and decreased postoperative thigh pain (P =.03) for patients who have with HA-coated stems. There was no significant difference in HHS (P =.20), endosteal bone formation (P =.96), radiolucent lines (P =.75), linear wear rate (P =.41), or heterotopic ossification (P =.71) between HA-coated and non–HA-coated stems. We found that HA-coated femoral stems in primary THA led to significantly fewer stem revisions for aseptic loosening and less postoperative thigh pain compared to non–HA-coated stems. These findings suggest HA-coated femoral stems should be preferred over non–HA-coated femoral stems in primary THA. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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28. Neurointerventions on two generations of angiography systems: Recent systems reduce radiation exposure by half.
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Li, Xinhua, Yang, Kai, Marschall, Theodore A., Rehani, Madan M., and Liu, Bob
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• Air kerma at the reference point (K a,r) on a new generation of angiography system was 48% of an older reference system. • Air kerma-area product (KAP) on the new system was 50% of the older system. • Substantial decrease in radiation exposure to the patients may also translate to the staff. Fluoroscopically-guided neurointervention may be associated with prolonged procedure time and substantial radiation exposure to the patient and staff. This study sought to examine technological features affecting the potential radiation exposure reduction of new angiography systems, compared to older systems, for neurointerventional procedures. Consecutive neurointerventional patients (2020–2022) were retrospectively analyzed. The air kerma at the reference point (K a,r) and kerma-area product (KAP) were compared between Artis icono and Artis zee (Siemens) using statistical analyses (two-tailed t tests), where P < 0.05 is considered significant. X-ray tube potential and copper filtration were examined. Tests with an anthropomorphic phantom (Sun Nuclear) on Artis icono were conducted and entrance skin exposure and x-ray spectral half value layer were measured. Effective spectral filtration was characterized by x-ray spectral modeling. The number of procedures was 1158 [median (range) age, 59 (7–95) years] on Artis zee and 1087 [60 (1–95) years] on Artis icono, without significant difference in age (p = 0.059) between cohorts. K a,r was 925.4 (890.6–960.1) mGy [mean (95 % CI)] and KAP was 119.8 (115–124.5) Gy∙cm
2 on Artis zee. The measures were 48–50 % lower on Artis icono, 440.5 (411.7–469.4) mGy (K a,r) and 59.5 (55.4–63.6) Gy∙cm2 (KAP); while the difference in fluoroscopic time between the two generations of angiography systems was insignificant (p = 0.55). The newer angiography system, with updated hardware and software, was found to result in half the radiation exposure compared to older technology of the same manufacturer, even though fluoroscopic time was similar. [ABSTRACT FROM AUTHOR]- Published
- 2024
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29. Complex basilar artery fenestration aneurysm successfully treated with single flow diverter using novel “crossing flow diverter technique” – A rare case report and review of literature
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Gaikwad, Shailesh B, Puneeth, KT, Nadarajah, Jeyaseelan, and Gupta, Madan M
- Abstract
Basilar artery fenestration aneurysms are very rare and endovascular management of large and complex aneurysms is extremely challenging. Most of these type of cases are managed with stent assisted coiling, dual flow diverters (FD) and single FD with additional coiling of aneurysm and occlusion of one of the vertebral artery. Here, we report a case of large complex basilar artery fenestration aneurysm successfully treated with single FD using novel technique called “crossing flow diverter technique” without any additional coiling of aneurysm or occlusion of vertebral artery. Using this technique cost of procedure and procedural complexity inherent with other above mentioned techniques can be significantly reduced.
- Published
- 2021
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30. IS IT TIME TO CHANGE BLOOD PRESSURE RECOMMENDATIONS FOR EXERCISE TESTING IN SPONTANEOUS CORONARY ARTERY DISSECTION?
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Carvalho, C., Cotie, L., Madan, M., Nijhawan, R., Oh, P., and Colella, T.
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- 2023
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31. IS IT TIME TO CHANGE BLOOD PRESSURE RECOMMENDATIONS FOR EXERCISE TESTING IN SPONTANEOUS CORONARY ARTERY DISSECTION?
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Carvalho, C., Cotie, L., Madan, M., Nijhawan, R., Oh, P., and Colella, T.
- Published
- 2023
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32. Prediction of fly-rock during boulder blasting on infrastructure slopes using CART technique
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Bhagat, Narayan Kumar, Rana, Aditya, Mishra, Arvind K., Singh, Madan M., Singh, Atul, and Singh, Pradeep K.
- Abstract
AbstractBoulder blasting is a different process from conventional bench blasting. Fly-rock produced in boulder blasting is a major safety concern due to the presence of 360° free-face which may result into excessive throw of the fragments radially up to 900 m distance causing accidents. Many researchers have attempted to predict the fly-rock using empirical and soft computing tools in bench blasting. But, there is paucity of literature to predict the extent of fly-rock in boulder blasting. Machine learning techniques are frequently used in bench blasting to predict ground vibrations, air overpressure, fly-rocks, but it has been rarely used in boulder blasting. In this study, an attempt has been made to use Classification and Regression Trees (CART) technique to predict the fly-rock distance in boulder blasting. Multiple linear regression (MLR) technique has been used to compare the results obtained by the CART technique. Sixty-one boulder blasting events were monitored while excavating the accident-prone slope areas of Konkan Railways. The performance of the developed models using both the techniques has been evaluated using the coefficients of determination (R2) and root-mean-square error (RSME) values. The results indicate that CART model (R2= 0.9555 and RMSE = 1.141) provides better output than MLR model. This paper suggests the use of CART technique in boulder blasting, which will be useful in execution at sensitive locations to predict and control the fly-rock distance.
- Published
- 2021
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33. COVID‐19 in recent kidney transplant recipients
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Shingare, Ashay, Bahadur, Madan M., and Raina, Shailesh
- Abstract
As the coronavirus disease 2019 (COVID‐19) pandemic spread across the globe, transplant programs suffered a setback. We report the first experience of COVID‐19 infection within 1 month of living donor kidney transplant (LDKT). We describe 2 LDKT recipients who were detected positive for severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) infection at day 19 and day 7 posttransplant. They had minimal symptoms at diagnosis and did not develop any respiratory complications or allograft dysfunction. Immunosuppression was de‐escalated; however, nasopharyngeal swab real‐time reverse transcription polymerase chain reaction (rRT‐PCR) remained positive for SARS‐CoV‐2 for a prolonged time. Younger age, absence of other comorbidities, and lower dose of anti‐thymocyte globulin (ATG) used as induction possibly contributed to good outcome in our recent LDKT recipients compared with earlier published cases of recent deceased donor kidney transplant recipients with COVID‐19. Good outcomes for two patients with COVID‐19 within 1 month of living donor kidney transplantation are described.
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- 2020
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34. Import penetration and price relationships: An empirical analysis of the U.S. catfish market
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Surathkal, Prasanna and Dey, Madan M.
- Abstract
AbstractThe U.S. catfish aquaculture industry has undergone a continuous and alarming contraction over the last 15 years or so. The rapid increase in cheaper imports, which has coincided with the decline in the domestic catfish farming industry, is being blamed by industry commentators as a major cause of the decline. The impact of increased market share of imports on prices is of particular significance as prices are fundamental to the market process. We use an innovative approach to understand the impact of import shares on the linkage among prices in the U.S. catfish market. We divide the time-series data on market prices into high-import and low-import regimes using empirical techniques and analyze the difference in responsiveness of prices to shocks in the two regimes. Our main finding is that the domestic prices at the farm and processor level have become more responsive to shocks in each other and in themselves in the high-import regime.
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- 2020
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35. Strengthening Customer Experience through Artificial Intelligence: An upcoming Trend.
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Batra, Madan M.
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Customer experience is often discussed in corporate board rooms of large business firms in today's era of consumer empowerment has primarily resulted from the consumer access to free social media and the use of technologies such as artificial intelligence. This paper focuses on the changing nature of customer experience, including customer purchase journey and elaborates on the role of artificial intelligence in strengthening the customer experience, and in aligning the customer purchase journey. The paper assists future research in articulating the investigative associations between artificial intelligence and customer service excellence. The practitioners may benefit in acquiring an understanding of how to utilize the technological advancements to strengthen customer experiences. [ABSTRACT FROM AUTHOR]
- Published
- 2019
36. Iatrogenic Tracheal Stenosis After Yasui Operation in a Neonate With Aortic Atresia and Type B Aortic Interruption.
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Maddali, Madan M., Kandachar, Pranav S., Mohsen, Abdoulah, Arora, Nishant R., and Lacour-Gayet, Francois
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- 2019
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37. AN EFFICIENT AND EFFECTIVE TECHNIQUE FOR MARKER DETECTION AND POSE ESTIMATION USING A MONOCULAR CALIBRATED CAMERA.
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Jayakumari, J., Anand, S., Madan, M., and Misha, R.
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- 2019
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38. How Could Aortic Atresia With Interrupted Aortic Arch Survive? About a Neonatal Repair on Two Ventricles.
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Lacour-Gayet, Francois, Kandachar, Pranav, Al-Bulushi, Abdullah, Maddali, Madan M., Lacour-Gayet, F, Kandachar, P, Al-Bulushi, A, and Maddali, M M
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Aortic atresia with interrupted aortic arch (IAA) is an exceptional condition. In absence of associated lesion, the flow to the brain and the retrograde flow to the coronary arteries can only come from vessels on the descending aorta. This flow needs to be large enough to supply the brain and the myocardium. The only IAA type compatible with survival is type C where the flow from descending aorta could be insured by the left carotid and the left vertebral artery, branch of the left subclavian artery. Only one such a case was described in the literature. All the other surviving cases had an associated lesion including: a double aortic arch, an aorto-pulmonary window (AP window), an aberrant right subclavian artery or a bilateral patent ductus arteriosus (PDA). We report a case of aortic atresia with IAA type B associated with a double aortic arch that underwent a successful bi-ventricular one-stage neonatal Norwood-Rastelli repair and is doing well after 18 months. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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39. Functionalized Graphene Tagged Polyurethanes for Corrosion Inhibitor and Sustained Drug Delivery
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Patel, Dinesh K., Senapati, Sudipta, Mourya, Punita, Singh, Madan M., Aswal, Vinod K., Ray, Biswajit, and Maiti, Pralay
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Surface functionalization of graphene oxide with sulfonate group and subsequent grafting with polyurethane chains leads to the significant improvement in the properties of polymer and modified graphene as a filler. Modification of graphene oxide is revealed through spectroscopy while grafting of polymer chain over sulfonated graphene is confirmed through 1H NMR and other techniques. Higher order of self-assembly phenomena is observed in nanohybrids as compared to pure polymer through greater interaction between polymer chain and sulfonated graphene. Significant improvement in corrosion inhibition phenomena is observed using nanohybrids at low concentration as compared to pure polymer indicating its superior efficiency as a corrosion inhibitor. Nanohybrids also exhibit better biocompatible nature in lower concentration of filler with considerable sustained release of drug vis-à-vis pure polymer suggest its potential to use as a biomaterial for tissue engineering applications.
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- 2024
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40. A Polygenic Risk Score for Predicting Racial and Genetic Susceptibility to Prurigo Nodularis
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Vasavda, Chirag, Wan, Guihong, Szeto, Mindy D., Marani, Melika, Sutaria, Nishadh, Rajeh, Ahmad, Lu, Chenyue, Lee, Kevin K., Nguyen, Nga T.T., Adawi, Waleed, Deng, Junwen, Parthasarathy, Varsha, Bordeaux, Zachary A., Taylor, Matthew T., Alphonse, Martin P., Kwatra, Madan M., Kang, Sewon, Semenov, Yevgeniy R., Gusev, Alexander, and Kwatra, Shawn G.
- Abstract
Prurigo nodularis (PN) is an understudied inflammatory skin disease characterized by pruritic, hyperkeratotic nodules. Identifying the genetic factors underlying PN could help to better understand its etiology and guide the development of therapies. In this study, we developed a polygenic risk score that predicts a diagnosis of PN (OR = 1.41, P = 1.6 × 10−5) in two independent and continentally distinct populations. We also performed GWASs, which uncovered genetic variants associated with PN, including one near PLCB4(rs6039266: OR = 3.15, P = 4.8 × 10−8) and others near TXNRD1(rs34217906: OR = 1.71, P = 6.4 × 10−7; rs7134193: OR = 1.57, P = 1.1 × 10−6). Finally, we discovered that Black patients have over a two-times greater genetic risk of developing PN (OR = 2.63, P = 7.8 × 10−4). Combining the polygenic risk score and self-reported race together was significantly predictive of PN (OR = 1.32, P = 4.7 × 10−3). Strikingly, this association was more significant with race than after adjusting for genetic ancestry. Because race is a sociocultural construct and not a genetically bound category, our findings suggest that genetics, environmental influence, and social determinants of health likely affect the development of PN and may contribute to clinically observed racial disparities.
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- 2024
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41. Excoriation disorder is characterized by systemic glutamatergic dysfunction
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Bordeaux, Zachary A., Reddy, Sriya V., Ma, Emily Z., Cornman, Hannah, Pritchard, Thomas, Marani, Melika, Lu, Weiying, Guo, Shenghao, Zhang, Cissy, Khare, Pratik, Le, Anne, Kwatra, Madan M., and Kwatra, Shawn G.
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- 2024
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42. Single-Cell RNA Sequencing Reveals Dysregulated POSTN+WNT5A+ Fibroblast Subclusters in Prurigo Nodularis
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Patel, Jay R., Joel, Marina Z., Lee, Kevin K., Kambala, Anusha, Cornman, Hannah, Oladipo, Olusola, Taylor, Matthew, Imo, Brenda Umenita, Ma, Emily Z., Manjunath, Jaya, Kollhoff, Alexander L., Deng, June, Parthasarathy, Varsha, Cravero, Karen, Marani, Melika, Szeto, Mindy, Zhao, Ryan, Sankararaman, Sreenidhi, Li, Ruixiang, Henry, Shanae, Pritchard, Thomas, Rebecca, Vito, Kwatra, Madan M., Ho, Won Jin, Dong, Xinzhong, Kang, Sewon, and Kwatra, Shawn G.
- Abstract
Prurigo nodularis (PN) is an intensely pruritic, inflammatory skin disease with a poorly understood pathogenesis. We performed single-cell transcriptomic profiling of 28,695 lesional and nonlesional PN cells. Lesional PN has increased dysregulated fibroblasts (FBs) and myofibroblasts. FBs in lesional PN were shifted toward a cancer-associated FB–like phenotype, with POSTN+WNT5A+ cancer-associated FBs increased in PN and similarly so in squamous cell carcinoma. A multicenter cohort study revealed an increased risk of squamous cell carcinoma and cancer-associated FB–associated malignancies (breast and colorectal) in patients with PN. Systemic fibroproliferative diseases (renal sclerosis and idiopathic pulmonary fibrosis) were upregulated in patients with PN. Ligand–receptor analyses demonstrated an FB neuronal axis with FB-derived WNT5A and periostin interactions with neuronal receptors melanoma cell adhesion molecule and ITGAV. These findings identify a pathogenic and targetable POSTN+WNT5A+ FB subpopulation that may predispose cancer-associated FB–associated malignancies in patients with PN.
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- 2024
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43. Gd3+ion induced UV upconversion emission and temperature sensing in Tm3+/Yb3+:Y2O3phosphor
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Upadhyay, Madan M. and Kumar, Kaushal
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Cubic phase Tm3+/Yb3+:Y2O3and Tm3+/Yb3+/Gd3+:Y2O3phosphors were prepared by low temperature combustion technique for upconversion emission in UV–Visible range. The 980 nm excitation has generated UV emission at 314 nm in tridoped phosphor due to the energy transfer from Tm3+to Gd3+ion. Characteristic emission bands from Tm3+are also observed in both the phosphors. Thermally coupled Stark sublevels 1G4(a)(476 nm) and 1G4(b)(488 nm) of Tm3+ion were utilised for optical thermometry using fluorescent intensity ratio (FIR) method. The result shows that maximum absolute sensitivity in tridoped phosphor is observed to be 1.33 × 10−3 K−1 at 298 K. Moreover, temperature rise of phosphor at various pump power densities was also measured and it is estimated to achieve 407 K at the pump power density of 38.46 W/cm2.
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- 2024
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44. Medical physics workforce: A global perspective.
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Tsapaki, Virginia, Tabakov, Slavik, and Rehani, Madan M.
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Highlights • Global medical physicists production does not meet global clinical needs. • Approximately 58,950 medical physicists will be required by 2035. • Women representation is far from United Nations and European Commissions goals. • Women representation in higher hierarchy position is low. Abstract Purpose The International Organization for Medical Physics (IOMP) performed a detailed study following the first survey published in 2015 with the particular objectives: 1) gather data on global medical physicists (MPs) workforce, 2) identify differences between geographical regions and, 3) investigate whether there is a gender dimension in higher hierarchy positions. Methods An online questionnaire was send to IOMP members and contact points in countries where no professional MPs society existed. Information requested: total number (N) of MPs (men and women), N of current elected executive board (EB) of societies and women proportion in the board, president gender and number of women presidents for the last 10 years. IOMP archives were also investigated for data on gender composition related to chairs of committees, officers and IOMP awardees. Results Ninety three countries reported 29,179 MPs, from which 8702 were women (29.8%) and 20,477 men. The most dense MPs population was in Europe (34%), followed by North America (33%) and Asia/Oceania (24%). Societies EB women members constitute 21–40%, but rarely reach the presidential position. The IOMP archived data show that women MP representation decreases in higher hierarchy positions. Conclusions Global MPs production does not meet clinical needs especially in Latin America/Caribbean and Africa (6% of total MPs workforce and small number of MPs/million of population). Rough estimations showed that approximately 58,950 MPs will be required by 2035. Women representation is away from the United Nations and European Commissions goals. Women representation in higher hierarchy position is low. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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45. Evaluation of medical physics training in radiology residency in 67 countries.
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Rehani, Madan M., Pauwels, Ruben, and Rehani, Bhavya
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Highlights • Teaching of medical physics to radiology resident by radiologists is common. • Lack of involvement of medical physicists in the examinations observed. • Better involvement of medical physicists in radiology education needed. Abstract Purpose The main aim of medical physics training in radiology residency is to have appropriate and safer imaging of patients and safety of personnel. The need to have adequate coverage of medical physics and radiation safety in curricula of radiology residency is well perceived, but it is not known how far it is implemented in practice. Methods We have analysed the data from 67 countries on medical physics teaching and assessment of residents in radiology programs, considering differences between countries in function of their human development index (HDI). Results The results indicate that teaching of medical physics by radiologists rather than by medical physicists is very common and there is relationship with the developmental status of a country. The majority of countries with very high HDI used a written test (69%) for medical physics topics, often in combination with other subjects (63%). Further, there is lack of direct involvement of medical physicists during the examination phase of residents. Geographically, it can be seen that Latin American countries in particular lack involvement of medical physicists during both the teaching and examination phase. Conclusion The lack of adequate involvement of medical physicists in training and in the formal examination of radiology residents in both developed and developing countries is a matter of concern with likely implications on patient and staff safety. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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46. Designing a Holistic Customer Experience Program.
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Batra, Madan M.
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Customer experience (CX) as a challenge or an opportunity appears frequently in a variety of corporate discussions on business strategy, marketing strategy, and customer service. The current field of CX has primarily emerged from the rapid technological advancements and the resulting consumer empowerment through almost-free social-media accessibility by consumers-at-large. Accordingly, competitive and evolving organizations need to develop CX programs to strengthen their CX-related performance that may be reflected in customer attraction, customer acquisition, and customer retention. The current paper discusses a holistic CX framework and design along with some implementation suggestions for such competitive and evolutionary organizations. [ABSTRACT FROM AUTHOR]
- Published
- 2018
47. NiTiPt shape memory alloy: microstructure and transformation behaviour
- Author
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Ramaiah, K. V., Saikrishna, C. N., Sujata, M., Madan, M., and Bhaumik, S. K.
- Abstract
In this article, microstructural evolution in an NiTiPt high-temperature shape memory alloy during processing and its effect on transformation behaviour have been reported. Cast NiTiPt alloy revealed an inhomogeneous microstructure, wherein the interdendritic regions were rich in Ti and Ni, and depleted in Pt compared to the dendritic regions. Inhomogeneity in the microstructure resulted in an alloy with a wide transformation width (Ms–Mfor Af–As) of about 160 °C. Homogenization of the cast alloy at 1050 °C resulted in complete dissolution of dendrites in the microstructure and reduction in the phase transformation width to 35–40 °C. Further microstructural refinement in the homogenized alloy was achieved through hot working and a combination of cold working and annealing. The wrought alloy possessed an average grain size of about 10 μm and phase transformation width of 20–25 °C. TEM microstructure of cold drawn and shape memory annealed wire showed recrystallized microstructure with grain size of 200–300 nm and well-defined martensite twin variants.
- Published
- 2019
- Full Text
- View/download PDF
48. In Vitroand In VivoAntifilarial Activity of Standardized Extract of Calotropis proceraFlowers against Brugia malayi
- Author
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Kushwaha, Vikas, Rastogi, Subha, Pandey, Madan M., Saxena, Kirti, Khatoon, Sayyada, Rawat, Ajay K. S., and Murthy, P. Kaplana
- Abstract
Background: Lymphatic filariasis (LF) is a parasitic disease that causes permanent disability (elephantiasis). Currently used antifilarial drugs are failing to control LF and there is resurgence in some areas. Looking for new antifilarial leads, we found that Calotropis procera plant parts have been used in traditional medicine for alleviating elephantiasis but the antifilarial activity is not known. Objective: In the present study, the antifilarial activity of ethanolic extract (A001) and its hexane fraction (F001) of C. procera flowers was investigated using the human filarial parasite Brugia malayi. Methods: A001 and F001 were tested for antifilarial activity using motility and 3-(4,5-dimethylthiazol-2- yl)-2,5 diphenyltetrazolium bromide (MTT) assays (in vitro) and in the rodent models B. malayi- Meriones unguiculatus and B. malayi-Mastomys coucha. In the rodent models, A001 and F001 were administered orally for 5 consecutive days, and the adult worm burden and course of microfilaraemia were determined. Results: Both A001 and F001 showed microfilaricidal and macrofilaricidal activity in vitro. In animal models, A001 killed ~49-54% adult worms. In M. coucha model, F001 killed 12-60% adult worms in a dose (125-500 mg/kg) dependent manner; A001 and F001 suppressed microfilaraemia till days 91 and 35 post initiation of treatment, respectively. HPTLC revealed 0.61% lupeol, 0.50% β-sitosterol and 1.50% triacontanol in F001. Conclusion: Flowers of C. procera have definite microfilaricidal and macrofilaricidal activities. Whether this activity is due to lupeol, β-sitosterol and triacontanol found in the hexane fraction remains to be investigated. This is the first report on the antifilarial efficacy of flowers of the plant C. procera.
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- 2019
- Full Text
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49. Radiation Dose Monitoring for Fluoroscopically Guided Interventional Procedures: Effect on Patient Radiation Exposure
- Author
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Liu, Bob, Hirsch, Joshua A., Li, Xinhua, Sheridan, Robert M., Rehani, Madan M., Zheng, Hui, and Rabinov, James D.
- Abstract
Continuous dose monitoring and patient follow-up provide timely feedback to interventionalists and promote high-dose procedure reduction over time.
- Published
- 2019
- Full Text
- View/download PDF
50. Forecasting monthly catfish (Ictalurus punctatus.) pond bank and feed prices
- Author
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Hasan, Mohammad R., Dey, Madan M., and Engle, Carole R.
- Abstract
AbstractVolatility in catfish pond bank and feed prices lead to profit uncertainty in the catfish industry. Analysis of the factors that affect those prices and development of a forecasting model would provide guidance to catfish farm managers. Error-correction models (ECM) based on cointegrating relationships among variables were specified following development of a single-equation ARIMAX model. Factors identified as those that influence catfish price were: lagged value of catfish, feed and substitute product prices, while those that influenced feed price were: lagged value of feed, corn and soybean prices. ECM estimates implied that fish price adjusts approximately 6% and feed price 22% to the long-run equilibrium in 1 month. The analysis showed that it takes less than 17 months and 5 months to correct for long-run disequilibrium for catfish and feed prices, respectively. The ARIMAX model demonstrated a better fit for both in-sample and out-of-sample forecasting for catfish price and had better out-of-sample predictive ability for feed prices.
- Published
- 2019
- Full Text
- View/download PDF
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