321 results on '"Ihsan, S"'
Search Results
2. Increased AGE Cross-Linking Reduces the Mechanical Properties of Osteons
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Elnunu, Ihsan S., Redmond, Jessica N., Obata, Yoshihiro, Woolley, William, Kammer, David S., and Acevedo, Claire
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- 2024
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3. Geochemistry of the Massive Dolomites in Eastern Black Sea Region: REE Implications for Dolomite Petrogenesis
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Merve Özyurt, Kırmacı, M. Ziya, Al-Aasm, Ihsan S., and Kandemir, Raif
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- 2024
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4. The overall quality of evidence of recommendations surrounding nutrition and diet in inflammatory bowel disease
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Weissman, Simcha, Fung, Brian M., Bangolo, Ayrton, Rashid, Atif, Khan, Badar F., Tirumala, Aditya K. Gudimella, Nagpaul, Sneha, Cornwell, Samuel, Karamthoti, Praveena, Murugan, Vignesh, Taranichi, Ihsan S., Kalinin, Maksim, Wishart, Annetta, Khalaf, Ibtihal, Kodali, Naga A., Aluri, Pruthvi S. C., Kejela, Yabets, Abdul, Rub, Jacob, Feba M., Manoharasetty, Advaith, Sethi, Aparna, Nadimpallli, Preethi M., Ballestas, Natalia P., Venkatraman, Aarushi, Chirumamilla, Avinash, Nagesh, Vignesh K., Gangwani, Manesh K., Issokson, Kelly, Aziz, Muhammad, Swaminath, Arun, and Feuerstein, Joseph D.
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- 2023
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5. Evaluation of Renoprotective Effect of Lipoic Acid and Bosentan Against Diclofenac-Induced Acute Renal Failure
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Lina Al-Hasani, Ghaith A. Jasim, and Ihsan S. Rabeea
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Pharmacy and materia medica ,RS1-441 - Abstract
Acute renal failure also known as acute kidney injury (AKI) is a complex health condition related to significant morbidity and mortality. In hospitalized patients, around 19-33 percent of AKI episodes are linked to drug induced nephrotoxicity. Although considered safe, NSAIDs such as diclofenac have gained special attention over the past few years due to the potential risk of renal injury. The direct effect of diclofenac-induced renal injury depends on targeting the mitochondria in kidney tissue, and formation of reactive oxygen species (ROS) resulting in oxidative stress. Secondly, diclofenac inhibit renal prostaglandin production, limiting renal afferent arteriole vasodilation, increasing afferent resistance; thus decreasing the glomerular capillary pressure below normal values and glomerular filtration rate will decrease resulting in AKI. Alpha-Lipoic acid (ALA) has beneficial effects in prevention or relief of symptoms of oxidative stress- related diseases, as it acts as antioxidant and anti-inflammatory micronutrient. Bosentan is a competitive antagonist with dual endothelin-1 receptors, as renal vascular ET-1 system is upregulated under many pathophysiological situations. In present study, we investigated the effect of lipoic acid and bosentan in diclofenac induced acute renal failure in male rats. We observed that diclofenac increased serum levels of urea, creatinine, malondialdehyde, KIM-1, TGFβ1 and fibronectin significantly (p>0.05) in the induction group compared to control group. While, SOD significantly (p>0.05) reduced in the induction group compared to control group. Both of lipoic acid and bosentan alone didn’t significantly protect against diclofenac induced AKI. However, the combination group showed a significant protection against AKI. Pearson correlation analysis showed a significant positive correlation between (urea and KIM-1) and between (creatinine and KIM-1) (r2=0.792 and r2=0.677 respectively). Furthermore, there was a significant positive correlation between fibronectin and urea (r2= 0.498, p>0.01) and fibronectin and creatinine (r2=0.356, p>0.05). Interestingly, KIM-1 showed a significant positive correlation with fibronectin (r2=0.536, p>0.01). ROC curve test was performed for KIM-1 and fibronectin biomarkers. The AUC for KIM-1 was 0.986 and for fibronectin was 0.829. We concluded that combination therapy of lipoic acid and bosentan showed a significant protective effect against diclofenac-induced AKI. In addition, fibronectin could be a promising biomarker for detection and diagnosis of acute kidney injury. Key words: Diclofenac, oxidative stress, alpha- lipoic acid, endothelin-1, bosentan
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- 2023
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6. Geochemical constraints of hydrothermal alteration of dolostones: An example of Lower Cretaceous Qamchuqa Formation, Kurdistan Region, northern Iraq
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Kareem, Kareem H., Al-Aasm, Ihsan S., and Mansurbeg, Howri
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- 2021
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7. Biogenic gold nanoparticles of Salviaspecies in dyes degradation and detection of lead(II)
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Ihsan, S., Qazi, R. A., Jamila, N., Bibi, N., Wasil, Z., and Khan, N.
- Abstract
The present study describes synthesis of Salviaspecies (S. plebeiaand S. moorcroftiana) mediated gold nanoparticles using deionized water and ethanol as extracting solvents. The study further quantify total phenolic and flavonoids content, assessment of antioxidative and microbial inhibitory potential, and catalytic and sensing abilities of the synthesized gold nanoparticles in dyes degradation and heavy metals sensing. Quantifying the phenolic content, ethyl acetate extract of S. moorcroftianaexhibited the high content (327.2 mg gallic acid equivalent per gram) followed by ethanol and methanol extracts. However, S. plebeiawas comparatively low in total phenolic content. In total flavonoid content quantification, methanol and ethanol extracts of S. moorcroftianaexhibited statistically same content (406.9 mg quercetin equivalent per gram and 400.8 mg quercetin equivalent per gram, respectively) followed by ethyl acetate extract. In synthesis of Salviaaqueous mediated gold nanoparticles, ratio/concentration (extract/salt solution) of 1:20 resulted in the most intense and sharp peak at 520–530 nm, whereas ethanolic extract produced reasonable and prominent nanoparticles under sunlight with 1:5 to 1:10 concentration. Assessing the antioxidant and antibacterial activities, Salviaextracts and the nanoparticles were potent antiradical and antibacterial agents. Furthermore, the subject nanoparticles have shown reasonable degradation of Congo red, methylene blue, and methyl orange, and sensing property to detect lead(II) in river water. Hence, Salviaspecies and the nanoparticles could be used in curing diseases involving free radicals, infections, and remediation of environmental contamination with dyes and lead(II).
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- 2024
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8. Histopathological study of diclofenac induced acute renal failure under lipoic acid and bosentan therapy in male albino rats
- Author
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Lina Bahjat Qasim, Ghaith A. Jasim, and Ihsan S. Rabeea
- Subjects
acute kidney injury, diclofenac, lipoic acid, bosentan ,Pharmacy and materia medica ,RS1-441 - Abstract
Acute kidney injury (AKI), formly known as acute renal failure (ARF), is an abrupt and reversible decrease in kidney function as indicated by the glomerular filtration rate (GFR). Diclofenac-induced AKI is due to toxic effect of it on renal glomeruli, resulting in glomerular lesions. Furthermore, diclofenac causes autolysis, which increase renal intracellular osmolarity that leads to proximal renal tubular dilatations. Lipoic acid (LA) has antioxidant and anti-inflammatory activities. Bosentan is a competitive endothelin A (ETA) and endothelin B (ETB) receptors antagonist. In this study, the evaluation of effectiveness of lipoic acid and bosentan against diclofenac-induced AKI was done by histopathological examination. The results showed that diclofenac caused histopathological changes include; retracted glomerulus, tubular cast, tubule-interstitial inflammation and tubular necrosis. Lipoic acid or bosentan alone could not reduce the histopathological alterations caused by diclofenac. Meanwhile, the combination therapy was able to reduce the histopathological changes significantly (p>0.05). Therefore, the combination therapy of lipoic acid and bosentan showed promising ameliorative effect against diclofenac-induced AKI
- Published
- 2022
- Full Text
- View/download PDF
9. Geochemistry of dolomite fluorescence in response to thermal maturity: An example from Upper Ordovician Utica Shale of southern Québec, Canada
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Ardakani, Omid H., Sanei, Hamed, Jackson, Simon E., and Al-Aasm, Ihsan S.
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- 2020
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10. Evaluation of Pregnant Knowledge and Adherence Regarding Supplemental Iron, Folic acid, Calcium, and Vitamins During Pregnancy
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Karim, Walaa A., primary, Rabea, Ihsan S., additional, and Abdulwahid, Hameeda H., additional
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- 2024
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11. Diagenetic Evolution of Upper Jurassic-Lower Cretaceous Berdiga Formation, NE Turkey: Petrographic and Geochemical Evidence
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Özyurt, Merve, Al-Aasm, Ihsan S., Ziya Kirmaci, M., Pisello, Anna Laura, Editorial Board Member, Hawkes, Dean, Editorial Board Member, Bougdah, Hocine, Editorial Board Member, Rosso, Federica, Editorial Board Member, Abdalla, Hassan, Editorial Board Member, Boemi, Sofia-Natalia, Editorial Board Member, Mohareb, Nabil, Editorial Board Member, Mesbah Elkaffas, Saleh, Editorial Board Member, Bozonnet, Emmanuel, Editorial Board Member, Pignatta, Gloria, Editorial Board Member, Mahgoub, Yasser, Editorial Board Member, De Bonis, Luciano, Editorial Board Member, Kostopoulou, Stella, Editorial Board Member, Pradhan, Biswajeet, Editorial Board Member, Abdul Mannan, Md., Editorial Board Member, Alalouch, Chaham, Editorial Board Member, O. Gawad, Iman, Editorial Board Member, Amer, Mourad, Series Editor, Boughdiri, Mabrouk, editor, Bádenas, Beatriz, editor, Selden, Paul, editor, Jaillard, Etienne, editor, Bengtson, Peter, editor, and Granier, Bruno R.C., editor
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- 2019
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12. Structurally-controlled hydrothermal fluid flow in an extensional tectonic regime: A case study of Cretaceous Qamchuqa Formation, Zagros Basin, Kurdistan Iraq
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Kareem, Kareem H., Al-Aasm, Ihsan S., and Mansurbeg, Howri
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- 2019
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13. Evaluation of Pregnant Knowledge and Adherence Regarding Supplemental Iron, Folic acid, Calcium, and Vitamins During Pregnancy.
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Karim, Walaa A., Rabea, Ihsan S., and Abdulwahid, Hameeda H.
- Published
- 2024
14. PRE‐, SYN‐ AND POST‐TECTONIC DIAGENETIC EVOLUTION OF A CARBONATE RESERVOIR: A CASE STUDY OF THE LOWER CRETACEOUS FAHLIYAN FORMATION IN THE DEZFUL EMBAYMENT, ZAGROS FOLDBELT, SW IRAN
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Keyvani, Forooz, primary, Al‐Aasm, Ihsan S., additional, Mansurbeg, Howri, additional, and Morad, Sadoon, additional
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- 2023
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15. Fluid compartmentalization and dolomitization in the Cambrian and Ordovician successions of the Huron Domain, Michigan Basin
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Al-Aasm, Ihsan S. and Crowe, Richard
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- 2018
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16. Geochemical characteristics of Upper Jurassic-Lower Cretaceous platform carbonates in Hazine Magara, Gumushane (northeast Turkey): implications for dolomitization and recrystallization
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Ozyurt, Merve, Kirmaci, M. Ziya, and Al-Aasm, Ihsan S.
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Turkey -- Natural history ,Carbonate rocks -- Discovery and exploration ,Cretaceous period ,Crystallization -- Observations ,Dolomitization -- Observations ,Jurassic period ,Mineralogical chemistry -- Methods ,Earth sciences - Abstract
The Upper Jurassic--Lower Cretaceous Berdiga Formation of the Eastern Pontides, Turkey, represents a carbonate platform succession composed of pervasively dolomitized intra-shelf to deep-shelf facies. In this area, polymetallic deposits occur as veins and lenses within the Berdiga Formation in close proximity to its upper contact with the overlying formation. Three different types of replacive dolomites occur in the formation: (i) microcrystalline dolomite, (ii) fabric-preserving dolomite, and (iii) fabric-destructive dolomite. Replacive dolomites are Ca rich and nonstoichiometric ([Ca.sub.56]-58Mg42-44) and are characterized by a pronounced negative shift in oxygen (-11.38[per thousand] to -4.05[per thousand] Vienna Pee Dee Belemnite (VPDB)), [delta][.sup.13]C values of 0.69[per thousand] to 3.13[per thousand] VPDB, radiogenic [.sup.87]Sr/[.sup.86]Sr ratios (0.70753 to 0.70884), and extremely high Fe (2727-21053 ppm) and Mn (1548-27 726 ppm) contents. All dolomite samples have low Y/Ho ratios (23-40), and they also contain highly variable contents of rare earth elements (REE) (7-41). REE patterns of dolomites normalized to Post-Archean Australian shale show a distinct positive Eu anomaly (1.3-2.1) and slightly flattened Ce anomalies (0.8-1.1). Integration of petrographic and geochemical studies reveals the history of a variety of diagenetic processes highly affected by hydrothermal alteration, which include dolomitization, recrystallization, dissolution, silicification, and pyrite mineralization associated with the emplacement of the polymetallic mineralization. La Formation de Berdiga du Jurassique superieur-Cretace inferieur des Pontides orientales (Turquie) represente une sequence de plateforme carbonatee comprenant des facies intensement dolomitises allant de la plateforme interne a la plateforme profonde. Dans cette region, des gisements polymetalliques sont presents sous forme de filons et lentilles dans la Formation de Berdiga, tout pres de son contact avec la formation sus-jacente. Trois types de dolomite de remplacement sont presents dans la formation, a savoir : (i) de la dolomite microcristalline, (ii) de la dolomite preservant les fabriques et (iii) de la dolomite qui detruit les fabriques. Les dolomites de remplacement sont riches en Ca et non stoechiometriques ([Ca.sub.56-58][Mg.sub.42-44]) et elles sont caracterisees par un deplacement negatif prononce des valeurs d'isotopes d'oxygene (de -11,38 [per thousand] a -4,05 [per thousand] VPDB), des valeurs de [delta][.sup.13]C de 0,69 [per thousand] a 3,13 [per thousand] VPDB, des rapports [.sup.87]Sr/[.sup.86]Sr radiogeniques (de 0,70753 a 0,70884) et des concentrations en Fe (2727-21 053 ppm) et en Mn (1548-27 726 ppm) extremement elevees. Tous les echantillons de dolomite presentent des rapports Y/Ho faibles (de 23 a 40) et ont aussi des concentrations de terres rates (ETR) tres variables (de 7 a 41). Les spectres d'ETR des dolomites normalisees au PAAS presentent une nette anomalie positive d'Eu (de 1,3 a 2,1) et des anomalies de Ce legerement aplanies (de 0,8 a 1,1). L'integration d'etudes petrographiques et geochimiques fait ressortir l'histoire de differents processus diagenetiques fortement influences par l'alteration hydrothermale, dont la dolomitisation, la recristallisation, la dissolution, la silicification et la pyritisation associees a la mise en place de la mineralisation polymetallique. [Traduit par la Redaction], Introduction Dolomite [(CaMg(C[O.sub.3]).sub.2]) is a common diagenetic mineral. How dolomite is formed and altered are still matters of debate (e.g., Budd 1997; Al-Aasm et al. 2000; Warren 2000; Machel 2004; [...]
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- 2019
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17. Fluid compartmentalization of Devonian and Mississippian dolostones, Western Canada Sedimentary Basin: petrologic and geochemical evidence from fracture mineralization
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Al-Aasm, Ihsan S., Mrad, Carole, and Packard, Jeffery
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Western Canada -- Natural history ,Devonian period ,Geochemistry -- Methods ,Hydrothermal fluids -- Observations ,Hydrothermal systems (Geology) -- Structure -- Discovery and exploration ,Mississippian period ,Petrography -- Methods ,Sedimentary basins -- Structure -- Discovery and exploration ,Earth sciences - Abstract
Integrated petrographic, geochemical, and fluid inclusion study of fracture mineralization and associated host rock in selected Mississippian and Devonian carbonates extending from southeastern Alberta to northwestern British Columbia, Canada, aims to quantify the type and nature of fluid precipitated saddle dolomite and late calcite cement and their origin. Petrographic and isotopic evidence from both the Devonian and Mississippian fracture-filling carbonates indicate the presence of a hydrothermal fluid source. The [delta][.sup.18]O isotopic values for the Devonian saddle dolomite (-14.62[per thousand] to -3.75[per thousand] VPDB, average -11.12[per thousand]) combined with enriched [.sup.87]Sr/[.sup.86]Sr isotopic ratios (0.70827-0.71599, average 0.71006) and higher homogenization temperatures ([T.sup.h] = 74-194.6 [degrees]C, average 126.8 [degrees]C) and salinity values (7.7-26.6 wt.% NaCl, average 16.2 wt.% NaCl) show significant differences from the Mississippian saddle dolomite, which is characterized by less negative [delta][.sup.18]O isotopic values (-12.53[per thousand] to -7.82[per thousand] VPDB, average -9.14[per thousand]), less radiogenic [.sup.87]Sr/[.sup.86]Sr isotopic ratios (0.70859-0.70943, average 0.70887), and lower homogenization temperatures ([T.sup.h]) and salinity values of fluid inclusions (87.6-214.2 [degrees]C, average 136.3 [degrees]C; 2.0-13.2 wt.% NaCl, average 9.6 wt.% NaCl). Later fracture- and vug-rimming blocky calcite cement records comparable or slightly lower values of [delta][.sup.18]O (-16.31[per thousand] to -4.08[per thousand] VPDB, average -9.76[per thousand]) and [.sup.87]Sr/[.sup.86]Sr (0.70784-0.709743, average 0.70868) and much lower salinity values (0-22.5 wt.% NaCl, average 2.86 wt.% NaCl) for samples mostly from the Mississippian age group. These results possibly suggest two different hydrothermal episodes related to early (Antler) and late (Laramide) tectonic events that affected the Western Canada Sedimentary Basin with possible compartmentalization of hydrothermal systems and their associated brines in the basin. L'etude integree de la petrographie, de la geochimie et des inclusions fluides de mineralisation dans des fractures et dans les roches encaissantes associees dans des carbonates mississippiens et devoniens selectionnes du sud-est de l'Alberta au nord-ouest de la Colombie-Britannique (Canada) vise a quantifier le type et la nature de dolomites baroques et de ciment calcite tardif precipites par des fluides et leur origine. Les donnees petrographiques et isotopiques sur les carbonates de remplissage devoniens et mississippiens indiquent la presence d'une source de fluides hydrothermaux. Les valeurs de [delta][.sup.18]O de la dolomite baroque devonienne (de -14,62 a -3,75 [per thousand] VPDB; moyenne -11,12 [per thousand]) combinees a des valeurs de [.sup.87]Sr/[.sup.86]Sr enrichies (de 0,70827 a 0,71599; moyenne 0,71006) et a des temperatures d'homogeneisation ([T.sup.h] = 74-194,6 [degrees]C; moyenne 126,8 [degrees]C) et des valeurs de salinite (de 7,7 a 26,6; moyenne 16,2 % en poids equivalent NaCl) elevees sont significativement differentes de celles de la dolomite baroque mississippienne, caracterisee par des valeurs de [delta][.sup.18]O moins negatives (de -12,53 a -7,82 [per thousand] VPDB; moyenne -9,14 [per thousand]), des rapports [.sup.87]Sr/[.sup.86]Sr moins radiogeniques (de 0,70859 a 0,70943; moyenne 0,70887), ainsi que de plus faibles temperatures d'homogeneisation (87,6-214,2 [degrees]C; moyenne 136,3 [degrees]C) et valeurs de salinite (de 2,0 a 13,2; moyenne 9,6 % en poids equivalent NaCl) des inclusions fluides. Un ciment tardif de calcite rhombique remplissant des fractures et vacuoles donne des valeurs comparables ou legerement plus faibles de [delta][.sup.18]O (de -16,31 a -4,08 [per thousand] VPDB; moyenne -9.76 [per thousand]) et de [.sup.87]Sr/[.sup.86]Sr (de 0,70784 a 0,709743; moyenne 0,70868) et des salinites beaucoup plus faibles (de 0 a 22,5 %; moyenne 2,86 % en poids equivalent NaCl) pour des echantillons principalement mississippiens. Ces resultats pourraient indiquer deux episodes hydrothermaux distincts associes a des episodes tectoniques precoce (Antler) et tardif (Laramide) ayant touche le bassin sedimentaire de l'Ouest canadien, et la compartementalisation possible de systemes hydrothermaux et des saumures qui leur etaient associees dans le bassin. [Traduit par la Redaction], Introduction Diagenetic fluids in sedimentary basins form under diverse tectonic (e.g., foreland versus intracratonic) and sedimentologic settings. These fluids impose a major control on reservoir-quality evolution of carbonate successions. Sediment [...]
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- 2019
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18. Dolomitization of Paleozoic Successions, Huron Domain of Southern Ontario, Canada: Fluid Flow and Dolomite Evolution
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Ihsan S. Al-Aasm, Richard Crowe, and Marco Tortola
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fluid flow ,dolomitization ,Paleozoic ,Huron Domain ,Hydraulic engineering ,TC1-978 ,Water supply for domestic and industrial purposes ,TD201-500 - Abstract
Integrated petrographic, isotopic, fluid inclusion microthermometry, and geochemical analyses of Paleozoic carbonate successions from multiple boreholes within the Huron Domain, southern Ontario were conducted to characterize the diagenetic history and fluid composition, on a regional scale, and evaluate the nature and origin of dolomitized beds. Multiple generations of non-stochiometric dolomite have been observed. These dolomites occur as both replacement (D1 and D2) and cement (saddle dolomite; SD) and formed either at near-surface to shallow burial zone (D1) or intermediate burial (D2 and SD). Petrographic and geochemical data of dolomite types and calcite cement suggest that these carbonates have experienced multiple fluid events that affected dolomite formation and other diagenetic processes. Cambrian and Ordovician strata have two possibly isolated diagenetic fluid systems; an earlier fluid system that is characterized by a pronounced negative shift in oxygen and carbon isotopic composition, more radiogenic Sr ratios, warm and saline signatures, higher average ∑REE compared to warm water marine brachiopods, negative La anomaly, and positive Ce anomaly; and a later Ordovician system, characterized by less negative shifts in oxygen and carbon isotopes, comparable Th, hypersaline, a less radiogenic, less negative La anomaly, and primarily positive Ce anomaly but also higher average ∑REE compared to warm water marine brachiopods. Ordovician, Silurian, and Devonian Sr isotopic ratios, however, show seawater composition of their respective age as the primary source of diagenetic fluids with minor rock/water interactions. In contrast, the isotopic data of the overlying Silurian and Devonian carbonates show overlaps between δ13C and δ18O values. However, δ18O values show evidence of dolomite recrystallization. D2 shows wide Th values and medium to high salinity values. Higher Th and salinity are observed in SD in the Silurian carbonates, which suggest the involvement of localized fluxes of hydrothermal fluids during its formation during Paleozoic orogenesis. Geochemical proxies suggest that in both age groups the diagenetic fluids were originally of coeval seawater composition, subsequently modified via water-rock interaction possibly related to brines, which were modified by the dissolution of Silurian evaporites from the Salina series. The integration of the obtained data in the present study demonstrates the linkage between fluid flux history, fluid compartmentalization, and related diagenesis during the regional tectonic evolution of the Michigan Basin.
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- 2021
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19. Histopathological study of diclofenac induced acute renal failure under lipoic acid and bosentan therapy in male albino rats
- Author
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null Lina Bahjat Qasim, null Ghaith A. Jasim, and null Ihsan S. Rabeea
- Subjects
General Medicine - Abstract
Acute kidney injury (AKI), formly known as acute renal failure (ARF), is an abrupt and reversible decrease in kidney function as indicated by the glomerular filtration rate (GFR). Diclofenac-induced AKI is due to toxic effect of it on renal glomeruli, resulting in glomerular lesions. Furthermore, diclofenac causes autolysis, which increase renal intracellular osmolarity that leads to proximal renal tubular dilatations. Lipoic acid (LA) has antioxidant and anti-inflammatory activities. Bosentan is a competitive endothelin A (ETA) and endothelin B (ETB) receptors antagonist. In this study, the evaluation of effectiveness of lipoic acid and bosentan against diclofenac-induced AKI was done by histopathological examination. The results showed that diclofenac caused histopathological changes include; retracted glomerulus, tubular cast, tubule-interstitial inflammation and tubular necrosis. Lipoic acid or bosentan alone could not reduce the histopathological alterations caused by diclofenac. Meanwhile, the combination therapy was able to reduce the histopathological changes significantly (p>0.05). Therefore, the combination therapy of lipoic acid and bosentan showed promising ameliorative effect against diclofenac-induced AKI
- Published
- 2022
20. Impact of stylolitization on diagenesis of a Lower Cretaceous carbonate reservoir from a giant oilfield, Abu Dhabi, United Arab Emirates
- Author
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Paganoni, Matteo, Al Harthi, Amena, Morad, Daniel, Morad, Sadoon, Ceriani, Andrea, Mansurbeg, Howri, Al Suwaidi, Aisha, Al-Aasm, Ihsan S., Ehrenberg, Stephen N., and Sirat, Manhal
- Published
- 2016
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21. The overall quality of evidence of recommendations surrounding nutrition and diet in inflammatory bowel disease
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Simcha Weissman, Brian M. Fung, Ayrton Bangolo, Atif Rashid, Badar F. Khan, Aditya K. Gudimella Tirumala, Sneha Nagpaul, Samuel Cornwell, Praveena Karamthoti, Vignesh Murugan, Ihsan S. Taranichi, Maksim Kalinin, Annetta Wishart, Ibtihal Khalaf, Naga A. Kodali, Pruthvi S. C. Aluri, Yabets Kejela, Rub Abdul, Feba M. Jacob, Advaith Manoharasetty, Aparna Sethi, Preethi M. Nadimpallli, Natalia P. Ballestas, Aarushi Venkatraman, Avinash Chirumamilla, Vignesh K. Nagesh, Manesh K. Gangwani, Kelly Issokson, Muhammad Aziz, Arun Swaminath, and Joseph D. Feuerstein
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Gastroenterology - Published
- 2023
22. Gambaran Pemanfaatan Media Sosial sebagai Sumber Literasi Kesehatan Digital pada Mahasiswa Universitas Sam Ratulangi
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Asep Rahman, Andi Buanasari, Meilani Jayanti, Ihsan S. Tome, Andy A.N Hiola, and Eldy Sengkey
- Abstract
Literasi Kesehatan Digital menjadi salah satu strategi promosi kesehatan dalam meningkatkan pengetahuan masyarakat. Penggunaan media digital seperti media sosial menjadi lebih efektif dan efisien. Pada penelitian ini hendak mengkaji gambaran pemanfaatan media digital sebagai sarana informasi akan pandemi Covid-19. Selain itu, penelitian ini hendak mengindentifikasi pemanfatan media sosial dalam aktivitas promosi kesehatan oleh mahasiswa Fakultas Kesehatan Masyarakat, Fakultas Kedokteran, dan FMIPA Universitas Sam Ratulangi. Penelitian ini merupakan penelitian analisis deskriptif dengan menggunakan pendekatan kualitatif dan desain cross sectional. Pengambilan sampel dilakukan degan stratified random sampling. Informasi dari responden digali melalui kusisioner yang terdiri dari tiga bagian yakni identitas informan, sumber informasi terkait Covid-19, dan Covid-19 literacy level.
- Published
- 2021
23. Editorial for Special Issue 'Chemical, Mineralogical and Isotopic Studies of Diagenesis of Carbonate and Clastic Sediments'
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Ihsan S. Al-Aasm and Howri Mansurbeg
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n/a ,Mineralogy ,QE351-399.2 - Abstract
Diagenesis of carbonates and clastic sediments encompasses the biochemical, mechanical and chemical changes that occur in sediments after deposition and prior to low-grade metamorphism [...]
- Published
- 2020
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24. Diagenetic Pore Fluid Evolution and Dolomitization of the Silurian and Devonian Carbonates, Huron Domain of Southwestern Ontario: Petrographic, Geochemical and Fluid Inclusion Evidence
- Author
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Marco Tortola, Ihsan S. Al-Aasm, and Richard Crowe
- Subjects
dolomitization ,huron domain ,silurian ,devonian ,fluid composition ,michigan basin ,Mineralogy ,QE351-399.2 - Abstract
Core samples from two deep boreholes were analyzed for petrographic, stable and Sr isotopes, fluid inclusion microthermometry and major, minor, trace and rare-earth elements (REE) of different types of dolomite in the Silurian and Devonian carbonates of the eastern side of the Michigan Basin provided useful insights into the nature of dolomitization, and the evolution of diagenetic pore fluids in this part of the basin. Petrographic features show that both age groups are characterized by the presence of a pervasive replacive fine-crystalline (50−100 µm) dolomite matrix (RD2 and RD3, respectively). In addition to these types, a coarse crystalline (>500 µm) saddle dolomite cement (SD) filling fractures and vugs is observed only in the Silurian rocks. Results from geochemical and fluid inclusion analyses indicate that the diagenesis of Silurian and Devonian formations show variations in terms of the evolution of the diagenetic fluid composition. These fluid systems are: (1) a diagenetic fluid system that affected Silurian carbonates and was altered by salt dissolution post-Silurian time. These carbonates show a negative shift in δ18O values (dolomite δ18O average: −6.72‱ VPDB), Sr isotopic composition slightly more radiogenic than coeval seawater (0.7078−0.7087), high temperatures (RD2 and SD dolomite Th average: 110 °C) and hypersaline signature (RD2 and SD dolomite average salinity: 26.8 wt.% NaCl eq.); and (2) a diagenetic fluid system that affected Devonian carbonates, possibly occurred during the Alleghenian orogeny in Carboniferous time and characterized by a less pronounced negative shift in δ18O values (dolomite δ18O average: −5.74‱ VPDB), Sr isotopic composition in range with the postulated values for coeval seawater (0.7078−0.7080), lower temperatures (RD2 dolomite Th average: 83 °C) and less saline signature (RD2 dolomite average salinity: 20.8 wt.% NaCl eq.).
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- 2020
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25. Diagenesis of the Khuff Formation (Permian–Triassic), Northern United Arab Emirates
- Author
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Fontana, Simone, Nader, Fadi H., Morad, Sadoon, Ceriani, Andrea, Al-Aasm, Ihsan S., Al Hosani, Khalid, editor, Roure, Francois, editor, Ellison, Richard, editor, and Lokier, Stephen, editor
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- 2013
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26. Severity of Extrinsic Black Stain and prevalence of Dental Caries
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Tariq A. Alsemrani, Ihsan S. Alqeshtaini, Abdulrahman M. Albukhitan, Moayed A. Alhameed, Mishary B. Almotairy, and Yousif O. Abduldaiem
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stomatognathic diseases ,stomatognathic system ,business.industry ,Medicine ,Dentistry ,business ,Stain - Abstract
Background: Teeth discoloration is one of the most common problems among individuals nowadays. It can be caused by a variety of circumstances and can result in cosmetic problems as well as low self-esteem and dental caries. Hence the present was conducted to investigate the correlation between the severity of Black stains and the prevalence of caries, number of missing teeth, crowns, restorations, and Endodontically-treated teeth in adult patients at Riyadh Elm University Dental Clinics. Materials and Methods: The study consisted of 84 participants with age ranging from 18 to 60 years, with no gender preference. The subjects included in the study had not received any professional teeth scaling and polishing at least 6 months prior to the examination. Participants with an anterior fixed partial denture or any kind of restoration anteriorly with more than two incisors crowns or more than two missing incisors for each quadrant were excluded. Clinical examination was done by the single investigator who was calibrated by practicing it on 5 patients. Results: In the present study majority 64 (76.2%) of the participants aged between 18-32yrs, more than half 50 (59.5%) of them were male and the rest of them were female 34 (40.5%). A high percentage of subjects 34 (40.5%) were having a university level of education. Age, gender showed significant association with Intensity, extensity and composite scores of stains (p
- Published
- 2021
27. URBANIZATION AS A RISK FACTOR FOR RENAL STONE FORMATION
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Ihsan S Sahi and Haithem Abd Al-Khazrajee
- Subjects
urbanization as a risk factor for renal stone formation ,Medicine ,Science - Abstract
This is a prospective study of 270 patients presented with renal stone over four years. Side of the renal stone whether in left kidney or right kidney was considered. The size of the stone was measured by imaging techniques (ultrasound or by CT scan) in 166 patients, in the remaining 104 patients imaging was done only for diagnosis, but without measuring the renal stone size (for different reasons). Residency was considered as urban or rural for any of these patients. The study shows that urban residency has increased risk for developing renal stone (63.7%) as compared to rural areas (37.3%), this effect was clearly significant for stone size between 1-2 centimeters
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- 2015
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28. EFFECTS OF SEX HORMONES ON PROSTATE VOLUME IN PATIENTS WITH LOWER URINARY TRACT SYMPTOMS
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Murtatha M Salih, Jamal A Al-Dohan, and Ihsan S Mahmood
- Subjects
sex hormones ,effects of sex hormones on prostate volume ,lower urinary tract symptoms ,Medicine ,Science - Abstract
Ihsan S Mahmood*, Jamal A Al-Dohan@ & Murtatha M Salih$ *,@Department of Biochemistry, $Department of Surgery, College of Medicine, University of Basrah, Basrah, IRAQ. Abstract The objective of this study is to investigate the relationship between sex hormone levels and prostate volume in patients with lower urinary tract symptoms (LUTS). This study involved 66 patients suffering from LUTS for more than one month, with age ranged from 36 to 85 years who attended Basrah General Hospital outpatient clinic of urological surgery seeking management, eleven of them were suffering from non-insulin dependent diabetes mellitus (NIDDM). The medical and surgical history were taken through special questionnaire and the severity of LUTS was assessed by International Prostate Symptom Score (IPSS). General and urological examinations were done to them. Four ml of venous blood was drawn from each patient to measure luteinizing hormone (LH), follicle stimulating hormone (FSH), total testosterone (TT), free testosterone (fT), estradiol (E2) and prostate specific antigen (PSA) and the results were used to assess the presence of any association with IPSS or prostate volume. Also fasting blood sugar, blood urea, serum creatinine and thyroid stimulating hormone (TSH) were measured to identify unknown diabetic patients and exclude those with renal failure or dysthyroidism. Mean±SD of age and prostate volume of the patients were (63.8±9.5) years and (45.5±24.8) ml, respectively. The IPSS and bother scores were (17.3±6.5) and (3.8±1.4), respectively. Mean serum FSH, LH, TT, fT and E2 were (11.5±13.0) mIU/ml, (6.7±5.9) mIU/ml, (4.6±2.4) ng/ml, (6.5±4.8) pg/ml and (47.9±24.4), respectively. Patients with larger prostate volume (>40 ml) had significantly higher mean age and also had higher mean estradiol level after age adjustment (p value
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- 2013
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29. Association of ABO blood group with in‐hospital adverse outcome and long term persistent symptoms of COVID‐19 infection: A single‐center longitudinal observational study
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Ahmed Nafakhi, Ihsan S. Rabeea, Rasha Al‐Darraji, Hussein Nafakhi, Ahmed Mechi, Alhan Al‐Khalidi, and Mohammed alareedh
- Subjects
General Medicine - Abstract
There are gaps in knowledge regarding the association between the ABO blood group and coronavirus disease 2019 (COVID-19) immediate and long-term outcomes. We aimed to investigate the association of ABO blood group with COVID-19 in-hospital adverse outcomes and to determine whether ABO blood group is associated with post-COVID-19 persistent symptoms.This was a single-center longitudinal observational study that included patients who presented with symptoms suggestive of COVID-19 infection and a positive test for COVID-19 and were able to attend the out-patient clinic after 6 months following acute COVID-19. The main outcomes were intensive care unit admission, the requirement for respiratory support, in-hospital death, and persistent symptoms.A total of 169 patients were enrolled for the assessment of in-hospital adverse outcomes of whom 86 patients were included for the assessment of persistent symptoms after the exclusion of deceased patients or patients not attended the out-patient clinic. Patients with blood group B had higher prevalence of in-hospital death compared to blood group O (39% vs. 13%,Blood groups AB and B are significantly associated with respiratory support use and in-hospital death, respectively, compared to blood group O. Blood group AB is significantly associated with persistent palpitation and dizziness compared to other blood groups.
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- 2022
30. Predictors of post-acute COVID-19 pneumonia recovery status
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Ahmed Nafakhi, Ihsan S Rabeea, hussein nafakhi, and Rasha Al-Darraji
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respiratory tract diseases - Abstract
Background: Clinical trajectory and potential predictors for post-acute covid-19 are largely unknown. Methods: One hundred fifty one patients with COVID-19 infection and features suggestive of pneumonia were enrolled in the analysis. Results: Mild lung injury and high platelet mean volume(PMV) were predictors for complete recovery. Low Hb at presentation, length of ICU stay, extensive lung injury, old age and shortness of breath at presentation were predictors for persistent shortness of breath, while high Hb, extensive lung injury, and productive cough at presentation were predictors for persistent fatigue. Conclusion: mild lung injury and high PMV were predictors for complete recovery.
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- 2022
31. Coronary artery perforations: Four different cases and a review
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Ismail Dogu Kilic, Yusuf Izzettin Alihanoglu, Serhat B. Yildiz, Ozgur Taskoylu, Mustafa Zungur, Ihsan S. Uyar, and Harun Evrengul
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Coronary artery perforation (CAP) is a rare but feared complication of percutaneous coronary intervention. With the advent of new devices and technologies, interventionalists attempt more complex lesions, including more calcified or tortuous vessels and chronic total occlusions, which increases the incidence of CAP. A short literature review, in addition to four cases of CAP, is presented in this report. Resumo: As perfurações das artérias coronárias são raras, mas complicações temidas nas intervenções coronarianas percutâneas. Com o advento de novos dispositivos e tecnologias, a tentativa de intervenção em lesões mais complexas, incluindo os vasos mais calcificados ou tortuosos ou oclusões crónicas, leva a maior incidência de perfurações de artérias coronárias. Uma breve revisão da literatura, além de quatro casos de perfurações de artérias coronárias foi apresentada no presente trabalho. Keywords: Coronary artery perforation, Complication, Percutaneous coronary intervention, Palavras-chave: Perfurações de artérias coronárias, Complicação, Intervenção coronária percutânea
- Published
- 2013
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32. HORMONAL DISTURBANCES IN PATIENTS WITH BENIGN PROSTATE HYPERPLASIA
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Ihsan S Sahi, Mukhallad A Ramadhan, and Sadiq U Khadim
- Subjects
Medicine ,Science - Abstract
Ihsan S Sahi*, Mukhallad A Ramadhan@ & Sadiq U Khadim# *CABS, Head, Dept. of Surgery. @#MSc, Department of Pathology, University of Missan, College of Medicine, Missan, IRAQ. Abstract Benign prostatic hyperplasia (BPH, benign prostatic hypertrophy), a non-malignant abnormal growth of the prostate gland, affects almost all men in some degree as they age and can cause a significant disruption of lifestyle due to urinary outflow obstructive and irritative symptoms. The present study was performed on patients with BPH and other group of normal persons (40 person for each) to evaluate some of hormonal changes that result in BPH. The blood samples were collected from the groups of study those were of ages 45 and more and serum levels of both estrogen and testosterone were evaluated, as well as tissue of prostate were collected from some of the patients after surgery and estrogen receptors were estimated by immunohistochemisitry. The results shows significant reduction of the testosterone with elevation of the estradiol levels with marked expression of estrogen receptors in both epithelial and stromal cells of the prostate in patients. In conclusion, the present study found that sex hormonal disturbances associated with increase age of the person was implicated in the pathogenesis of BPH.
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- 2013
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33. EARLY VERSUS DELAYED LAPAROSCOPIC CHOLECYSTECTOMY IN ACUTE CHOLECYSTITIS
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Saad Abdulwahab Jaffer, Zaki Alfadagh, Mansoor Ameen Mohammed, Hamed Abed-Alnabi Flaifel, Hussein Abbas Muhalhil, Faiz Abdulwahid Alwaeely, Salah Zuhair Al-Asadi, Nawfal Ali Mubark, Ihsan S Sahi, Mukhallad A Ramadhan, Sadiq U Khadim, TALIB A AHMED, RIYADH J FAKHRULDEEN, Salam N Asfar, Jasim M Salman, American Board, FRCS, Nevada, T. A. Hamdan, and FRCP
- Subjects
Medicine ,Science - Abstract
Laparoscopic cholecystectomy is performed rather commonly by general surgeons for symptomatic gall stones. This study is an analysis of experience for the timing of laparoscopic cholecystectomy for acute cholecystitis performed in Basrah, Iraq, by one surgeon. This study aimed to know the difference between early and delayed laparoscopic cholecystectomy in acute cholecystitis with respect to the hospital stay, conversion rate, and major complications rate. Data were collected from the medical records of patients with acute cholecystitis admitted to the surgical wards during (June 2009 to September 2011). Patients were divided into 2 groups on the basis of treatment received. Length of hospital stay, major complications, and conversion rates were analyzed. Ninety seven patients with acute cholecystitis underwent laparoscopic cholecystectomy. Thirty nine patients (40.2%) treated with early laparoscopic cholecystectomy, fifty eight patients (59.8%) treated with delayed laparoscopic cholecystectomy. Length of stay was significantly shorter in the early laparoscopic cholecystectomy group compared with the delayed laparoscopic cholecystectomy group (P Keywords
- Published
- 2013
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34. POSTOPERATIVE ANALGESIA OF TRANSVERSUS ABDOMINIS PLANE BLOCK AFTER CESAREAN DELIVERY UNDER GENERAL ANESTHESIA
- Author
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Hamed Abed-Alnabi Flaifel, Hussein Abbas Muhalhil, Faiz Abdulwahid Alwaeely, Salah Zuhair Al-Asadi, Nawfal Ali Mubark, Ihsan S Sahi, Mukhallad A Ramadhan, Sadiq U Khadim, TALIB A AHMED, RIYADH J FAKHRULDEEN, Salam N Asfar, Jasim M Salman, American Board, FRCS, Nevada, T. A. Hamdan, and FRCP
- Subjects
Medicine ,Science - Abstract
Cesarean delivery under general anesthesia requires effective postoperative analgesia for early ambulation and breast feeding. Transversus abdominis plane (TAP) block is done by injecting local anesthetic solution in the plane between internal oblique and transversus abdominis muscles on either sides of the abdominal wall to prolong postoperative analgesia. One hundred pregnant women who underwent general anesthesia for cesarean delivery were randomized in to two equal groups;TAP block group versus control group. This block was performed bilaterally using 20 mls of 0.25% plain bupivacaine on each side. Each patient was assessed postoperatively by a blinded investigator at 2, 4, 6,12, 24 hours using numerical pain score (NPS) 0-10 at rest and movement. Narcotics consumption, drug side effects, and patient`s satisfaction were recorded. There were no significant differences between patients characteristics. Postoperative pain at rest as measured by NPS showed; medians (3-6) and means (3-5.5) in the control group; which were significantly (p
- Published
- 2013
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35. Association of ABO blood group with in‐hospital adverse outcome and long term persistent symptoms of COVID‐19 infection: A single‐center longitudinal observational study
- Author
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Nafakhi, Ahmed, primary, Rabeea, Ihsan S., additional, Al‐Darraji, Rasha, additional, Nafakhi, Hussein, additional, Mechi, Ahmed, additional, Al‐Khalidi, Alhan, additional, and alareedh, Mohammed, additional
- Published
- 2022
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36. Predictors of post-acute COVID-19 pneumonia recovery status
- Author
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Nafakhi, Ahmed, primary, Rabeea, Ihsan S, additional, nafakhi, hussein, additional, and Al-Darraji, Rasha, additional
- Published
- 2022
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37. The effects of diagenesis on the petrophysical and geochemical attributes of the Asmari Formation, Marun oil field, southwest Iran
- Author
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Ihsan S. Al-Aasm, Reza Moussavi-Harami, Asadollah Mahboubi, and J. Jafari
- Subjects
010506 paleontology ,Anhydrite ,Geochemistry ,Energy Engineering and Power Technology ,Geology ,010502 geochemistry & geophysics ,Geotechnical Engineering and Engineering Geology ,01 natural sciences ,Petroleum reservoir ,Diagenesis ,Petrography ,chemistry.chemical_compound ,Geophysics ,Fuel Technology ,chemistry ,Geochemistry and Petrology ,Facies ,Reservoir modeling ,Dolomitization ,Carbonate ,Economic Geology ,0105 earth and related environmental sciences - Abstract
The distribution of good reservoir quality and its causes is the main challenges in carbonate reservoir characterization. This study investigates the effects of diagenetic processes on the reservoir quality of the carbonate successions of the Asmari Formation, in the Marun oil field, southwest Iran. The study applies an integrated approach including core petrography, petrophysical rock typing, stable carbon and oxygen isotopes as well as major and trace elements analyses. Petrographic studies and geochemical analyses express that the Asmari limestones have been affected mainly by compaction, dissolution, recrystallization, calcite and anhydrite cementation and dolomitization. Among those diagenetic overprints, dolomitization and dissolution played an important role to enhance the reservoir quality of the formation. Moreover, four types of dolomites were recognized and the rate of dolomitization increases toward the top of the Asmari carbonate successions. Possible models for dolomitization include mixing zone, brine reflux, seepage reflux and tidal pumping of seawater. Employing Flow Zone Index and Discrete Rock Type concepts led to classification of the Asmari reservoir into seven reservoir rock types. Integrating reservoir rock typing with petrographic studies and geochemical analyses also confirms that reservoir quality of the Asmari Fm. would have been mainly controlled by diagenetic processes. Moreover, stable isotopes, trace elements and facies analyses support the idea that carbonate intervals of the Asmari Formation were deposited in a warm, shallow-water environment under a saline condition.
- Published
- 2020
38. PERANCANGAN MULTI SPEED CENTRIFUGE SEBAGAI ALAT PEMISAH CAIRAN
- Author
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Setyadi, Pratomo Setyadi, agung p, I Wayan S, ihsan S, shidiq F, and Shafira J
- Subjects
centrifuge ,quality function deployment ,manufacture - Abstract
A centrifuge is a device that works to separate organelles based on their density. The working principle of the centrifuge uses the rotation of the tube containing the solution so that it can be separated based on its density. Manufacturing centrifuges was made by covering several factors such as weight, cost, and ease of manufacture. With these considerations, the centrifuge makes using 3D printing. The utilization of 3D printers in Indonesia has been widely used because it makes it easier for humans to make prototypes. The quality Function Deployment (QFD) method was used for product development by discussing the manufacturing process, calculating the bill of materials, and selecting materials of the centrifuge. So as makes it easy to manufacture and operate. The study showed that to get maximum results, it was necessary to set parameters during the slicing process such as printer speed, coating thickness, support, bed temperature, and nozzle temperature. So this centrifuge can be used in medical field. Abstrak Centrifuge merupakan alat yang berfungsi untuk memisahkan organel berdasarkan massa jenisnya. Prinsip kerja centrifuge menggunakan prinsip rotasi atau perputaran tabung yang berisi larutan agar dapar dipisahkan berdasarkan massa jenisnya. Manufaktur pada alat centrifuge dibuat dengan mencakup beberapa faktor. Misalnya dari segi berat, biaya, dan kemudahan dalam pembuatannya. Dengan pertimbangan tersebut maka alat centrifuge dibuat menggunakan 3D printing. Penggunaan 3D printer di Indonesia sudah banyak yang menggunakannya karena 3D printer memiliki keunggulan antara lain mempermudah manusia dalam membuat prototype. Menggunakan metode Quality Function Deployment (QFD) pengembangan produk dengan membahas proses manufaktur alat centrifuge, perhitungan bill of materials, dan pemilihan material. Sehingga didapatkan kemudahan dalam pembuatan dan pengoperasiannya. Hasil dari penelitian didapatkan bahwa untuk mendapatkan hasil yang maksimal dibutuhkan pengaturan parameter-parameter pada saat proses slicing seperti kecepatan printer, ketebalan lapisan, support, temperature bed dan temperature noozle harus dilakukan settingan dengan benar. Sehingga alat ini dapat digunakan pada bidang medis. 
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- 2021
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39. Depositional Architecture and Facies of a Complete Reef Complex Succession: A Case Study of the Permian Jiantianba Reefs, Western Hubei, South China
- Author
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Beichen Chen, Xinong Xie, Ihsan S. Al-Aasm, Wu Feng, and Mo Zhou
- Subjects
reef ,reefal sequence ,lithofacies ,heterozoan carbonate ,photozoan carbonate ,Changhsingian ,Mineralogy ,QE351-399.2 - Abstract
The Upper Permian Changhsingian Jiantissanba reef complex is a well-known platform marginal reef, located in the western Hubei Province, China. Based on field observations and lithological analysis of the entire exposed reef complex, 12 reef facies have been distinguished according to their sedimentary components and growth fabrics. Each of the lithofacies is associated with a specific marine environment. Vertically traceable stratal patterns reveal 4 types of the lithologic associations of the Jiantianba reef: (1) heterozoan reef core association: developed in the deep marginal platform with muddy composition; (2) photozoan reef core association developed within the photic zone; (3) tide-controlled reef crest association with tidal-dominated characteristic of lithofacies in the shallow water; and (4) reef-bank association dominated by bioclastic components. The entire reef complex shows a complete reef succession revealing a function of the wave-resistant and morphological units. This study displays a complete sedimentary succession of Jiantianba reef, which provides a more accurate and comprehensive description of the reef lithofacies and a better understanding of the structure and composition of organic reefs.
- Published
- 2018
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40. Gambaran Pemanfaatan Media Sosial sebagai Sumber Literasi Kesehatan Digital pada Mahasiswa Universitas Sam Ratulangi
- Author
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Rahman, Asep, primary, Buanasari, Andi, additional, Jayanti, Meilani, additional, Tome, Ihsan S., additional, Hiola, Andy A.N, additional, and Sengkey, Eldy, additional
- Published
- 2021
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41. Dolomitization of Paleozoic Successions, Huron Domain of Southern Ontario, Canada: Fluid Flow and Dolomite Evolution
- Author
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Marco Tortola, Ihsan S. Al-Aasm, and Richard Crowe
- Subjects
fluid flow ,Recrystallization (geology) ,Paleozoic ,Evaporite ,Water supply for domestic and industrial purposes ,Geography, Planning and Development ,Dolomite ,Geochemistry ,dolomitization ,Hydraulic engineering ,Aquatic Science ,Biochemistry ,Devonian ,Diagenesis ,Dolomitization ,Ordovician ,Huron Domain ,TC1-978 ,TD201-500 ,Geology ,Water Science and Technology - Abstract
Integrated petrographic, isotopic, fluid inclusion microthermometry, and geochemical analyses of Paleozoic carbonate successions from multiple boreholes within the Huron Domain, southern Ontario were conducted to characterize the diagenetic history and fluid composition, on a regional scale, and evaluate the nature and origin of dolomitized beds. Multiple generations of non-stochiometric dolomite have been observed. These dolomites occur as both replacement (D1 and D2) and cement (saddle dolomite, SD) and formed either at near-surface to shallow burial zone (D1) or intermediate burial (D2 and SD). Petrographic and geochemical data of dolomite types and calcite cement suggest that these carbonates have experienced multiple fluid events that affected dolomite formation and other diagenetic processes. Cambrian and Ordovician strata have two possibly isolated diagenetic fluid systems, an earlier fluid system that is characterized by a pronounced negative shift in oxygen and carbon isotopic composition, more radiogenic Sr ratios, warm and saline signatures, higher average ∑REE compared to warm water marine brachiopods, negative La anomaly, and positive Ce anomaly, and a later Ordovician system, characterized by less negative shifts in oxygen and carbon isotopes, comparable Th, hypersaline, a less radiogenic, less negative La anomaly, and primarily positive Ce anomaly but also higher average ∑REE compared to warm water marine brachiopods. Ordovician, Silurian, and Devonian Sr isotopic ratios, however, show seawater composition of their respective age as the primary source of diagenetic fluids with minor rock/water interactions. In contrast, the isotopic data of the overlying Silurian and Devonian carbonates show overlaps between δ13C and δ18O values. However, δ18O values show evidence of dolomite recrystallization. D2 shows wide Th values and medium to high salinity values. Higher Th and salinity are observed in SD in the Silurian carbonates, which suggest the involvement of localized fluxes of hydrothermal fluids during its formation during Paleozoic orogenesis. Geochemical proxies suggest that in both age groups the diagenetic fluids were originally of coeval seawater composition, subsequently modified via water-rock interaction possibly related to brines, which were modified by the dissolution of Silurian evaporites from the Salina series. The integration of the obtained data in the present study demonstrates the linkage between fluid flux history, fluid compartmentalization, and related diagenesis during the regional tectonic evolution of the Michigan Basin.
- Published
- 2021
42. Estimation of vitamin E level and its relation to lipid profile in patients with type II Diabetes Mellitus
- Author
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Amani N. Al-Ramadhan, Ihsan S. Mahmood, Lamia M. Al-Naama, and Sakis K. Strak
- Subjects
DM type II ,Vitamin E ,Dyslipidemia ,diabetes mellitus ,Medicine - Abstract
Background: Type 2 diabetes mellitus (T2DM) is considered a global disease as it affects over 150 million people worldwide, a number that is supposed to be doubled by 2025. High glucose levels, in vitro, appear to raise the extent of LDL oxidation, and glycated LDL is more prone to oxidative modification.Objective: To investigate the relationship between serum level of vitamin E and lipid profile in patients with type II DM.Methods: This study involved 28 patients suffering from type II DM diagnosed 1-4 years ago and with age ranged from 17 -60 years old, with different residence around Basra ; In addition to 56 apparently healthy persons matched in age and sex to the patients as a control group. The medical histories were taken and General examinations were done to them with measurement of their height and weight. Four milliliters of venous blood was drawn from each patient and control to measure TG, TC, VLDL, HDL, LDL, HbA1C and Vitamin E and the results were used to assess the presence of any association between Vit E levels and lipid profile.Results: The mean levels for patients and controls of TG were (157.1± 24.9 and 119.8 ± 29.0) mg/dl, of TC were (204.0 ± 43.2 and 168.0 ± 31.5) mg/dl, of VLDL was (31.5 ± 5.0 and 24.2 ± 5.9) mg/dl, of LDL was (129.6 ± 42.8 and 97.6 ± 30.8) mg/dl, of HDL was (42.9 ± 10.2 ± 46.0 ± 9.0) Mg /dl, of HbA1C were (9.4 ± 3.0 and 5.0 ± 0.7) % and of vitamin E were (3.7 ± 1.3 and 6.8 ± 2.0) mg/dl, respectively.There was a significant difference between all the above measured parameters, except of HDL, between cases and controls. Also there was a significant association between DM type II and low level of vitamin E. there was a significant negative correlations between vitamin E and TG, TC, LDL, VLDL but not HDL, even after adjustment for age, sex and BMI.Conclusion: Diabetes mellitus type II has a significant effect on vitamin E which is an important guard against dyslipidemias, one the major causes of diabetes vascular complications
- Published
- 2015
43. Dolomitization of Paleozoic Successions, Huron Domain of Southern Ontario, Canada: Fluid Flow and Dolomite Evolution
- Author
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Al-Aasm, Ihsan S., primary, Crowe, Richard, additional, and Tortola, Marco, additional
- Published
- 2021
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44. Coenzyme Q10 Attenuates Cisplatin-induced Nephrotoxicity Through Counteracting Oxidative Stress and Inflammation
- Author
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Hala S. Bash and Ihsan S. Rabeea
- Subjects
0301 basic medicine ,Coenzyme Q10 ,Cancer Research ,business.industry ,Inflammation ,Pharmacology ,medicine.disease_cause ,03 medical and health sciences ,chemistry.chemical_compound ,030104 developmental biology ,0302 clinical medicine ,Oncology ,chemistry ,Cisplatin induced nephrotoxicity ,030220 oncology & carcinogenesis ,medicine ,General Pharmacology, Toxicology and Pharmaceutics ,medicine.symptom ,business ,Oxidative stress - Abstract
Background: Cisplatin is an anticancer drug used in the management of solid tumors, however, dose-related nephrotoxicity is one of its major problems. Agents having antioxidants, antiinflammatory and/or antiapoptotic activities may thus represent potential therapeutic options to avoid cisplatin-induced nephrotoxicity. Among these agents, coenzyme Q10 has several pharmacological properties including antioxidant, anti-inflammatory and/or anti-apoptotic effects. Objective: The current study aimed to examine whether coenzyme Q10 could attenuate cisplatininduced nephrotoxicity or not. Methods: 24 adult rats were randomly separated into three groups (8 rats per group). The first one was the control group, rats receiving vehicle (olive oil) intraperitoneally. The second group was Cisplatin treated group, rats were receiving 13 mg/kg of Cisplatin intraperitoneally as a single dose. The third group (Cisplatin + Coenzyme Q10), rats were receiving 13 mg/kg as a single intraperitoneal dose of Cisplatin and coenzyme Q10 daily for six consecutive days (10 mg/kg intraperitoneally). Results: Cisplatin caused significant increases in serum creatinine and severe histological lesions. Cisplatin treated group also showed a significant elevation in renal malondialdehyde concentration as a marker of oxidative stress; renal tumor necrosis factor-alpha concentration as a marker of inflammation; and Kidney injury molecule -1 concentration. Coenzyme Q10 significantly attenuated cisplatininduced nephrotoxicity through lowering serum creatinine and improving nephrotoxicity histological scores. Coenzyme Q10 also significantly reduced the renal concentration of MDA, TNF-α and KIM-1 relative to cisplatin treated group. Conclusions: Coenzyme Q10 has a potential nephroprotective effect against cisplatin-induced nephrotoxicity that was demonstrated by biochemical and histopathological analysis.
- Published
- 2019
45. Structurally-controlled hydrothermal fluid flow in an extensional tectonic regime: A case study of Cretaceous Qamchuqa Formation, Zagros Basin, Kurdistan Iraq
- Author
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Ihsan S. Al-Aasm, Howri Mansurbeg, and Kareem H. Kareem
- Subjects
Calcite ,Dolostone ,010506 paleontology ,Stratigraphy ,Dolomite ,Geochemistry ,Geology ,010502 geochemistry & geophysics ,01 natural sciences ,Hydrothermal circulation ,Diagenesis ,Petrography ,chemistry.chemical_compound ,chemistry ,13. Climate action ,Dolomitization ,Carbonate rock ,0105 earth and related environmental sciences - Abstract
Shallow water carbonate rocks of the Lower Cretaceous Qamchuqa Formation host a significant reserve of oil in the NNE Arabian plate-Southwestern Zagros Sutured Belt in the Kurdistan Region, Iraq. Such carbonates consist of several dolostone bodies with unique and complex arrays of saddle and zebra dolomite textures especially in fractured intervals. Integration of field, core description, microstructural analysis, petrographic, stable C, O and Sr isotopes, and fluid inclusion analyses reveals two main phases of multiple fluxes of hydrothermal fluid circulation during the Zagros Orogeny at the end of Cretaceous and Cenozoic times. An early regional non-focused hydrothermal dolomitization and a subsequent fault- and fracture- controlled hydrothermal fluid flow, which led to replacement and cementation by a range of saddle dolomite and zebra textures. Several generations of matrix dolomite, saddle dolomite and calcite cement were identified. The host dolostone has been affected by shortening, folding, fracturing, and thrust faulting. Saddle dolomite pipes, in particular, were found to be associated with en-echelon folding. The morphology and areal extent of the zebra dolomite are controlled by the pore geometry of the host dolostone in relationship to fracturing and faulting. Both matrix and saddle dolomite cements have comparable, overlapping stable isotopic values ranging from 0.39‰ to 3.57‰ and −0.12 to 3.11‰ VPDB, respectively for δ13C and δ18O values range from −10.53‰ to −4.47‰ and −12.87 to −7.79‰ VPDB, respectively. 87Sr/86Sr ratios of pervasive matrix dolomite range from 0.707702 to 0.707839, fall close to late Cretaceous seawater values. Slightly more radiogenic values of saddle dolomites ranging from 0.707759 to 0.708024 resulted from mixing of basinal brines with connate waters. Isotopic signatures of later calcite cements show more radiogenic Sr ratios from 0.707755 to 0.708198 and negative δ13C values 1.76 to −7.45‰, possibly related to late diagenetic processes due to incursion of meteoric waters during subaerial exposure. Fluid inclusion data of pervasive matrix dolomite and saddle dolomites show homogenization temperatures (Th) with a wide range from 71.3 to 169.7 °C and 82.3 to 188.2 °C, and salinity between 14.4 to 25.4 and 15.6 to 27.9 wt% NaCl eq., respectively. These values demonstrate the effect of hydrothermal fluid flow of the alteration of host dolomite and formation of saddle dolomite in fractures and faults.
- Published
- 2019
46. Fluid compartmentalization of Devonian and Mississippian dolostones, Western Canada Sedimentary Basin: petrologic and geochemical evidence from fracture mineralization
- Author
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Carole Mrad, Jeffery Packard, and Ihsan S. Al-Aasm
- Subjects
Petrography ,geography ,Mineralization (geology) ,geography.geographical_feature_category ,Geochemistry ,General Earth and Planetary Sciences ,Sedimentary basin ,Geology ,Devonian ,Inclusion study - Abstract
Integrated petrographic, geochemical, and fluid inclusion study of fracture mineralization and associated host rock in selected Mississippian and Devonian carbonates extending from southeastern Alberta to northwestern British Columbia, Canada, aims to quantify the type and nature of fluid precipitated saddle dolomite and late calcite cement and their origin. Petrographic and isotopic evidence from both the Devonian and Mississippian fracture-filling carbonates indicate the presence of a hydrothermal fluid source. The δ18O isotopic values for the Devonian saddle dolomite (−14.62‰ to −3.75‰ VPDB, average −11.12‰) combined with enriched 87Sr/86Sr isotopic ratios (0.70827–0.71599, average 0.71006) and higher homogenization temperatures (Th = 74–194.6 °C, average 126.8 °C) and salinity values (7.7–26.6 wt.% NaCl, average 16.2 wt.% NaCl) show significant differences from the Mississippian saddle dolomite, which is characterized by less negative δ18O isotopic values (−12.53‰ to −7.82‰ VPDB, average −9.14‰), less radiogenic 87Sr/86Sr isotopic ratios (0.70859–0.70943, average 0.70887), and lower homogenization temperatures (Th) and salinity values of fluid inclusions (87.6–214.2 °C, average 136.3 °C; 2.0–13.2 wt.% NaCl, average 9.6 wt.% NaCl). Later fracture- and vug-rimming blocky calcite cement records comparable or slightly lower values of δ18O (−16.31‰ to −4.08‰ VPDB, average −9.76‰) and 87Sr/86Sr (0.70784–0.709743, average 0.70868) and much lower salinity values (0–22.5 wt.% NaCl, average 2.86 wt.% NaCl) for samples mostly from the Mississippian age group. These results possibly suggest two different hydrothermal episodes related to early (Antler) and late (Laramide) tectonic events that affected the Western Canada Sedimentary Basin with possible compartmentalization of hydrothermal systems and their associated brines in the basin.
- Published
- 2019
47. Geochemical characteristics of Upper Jurassic – Lower Cretaceous platform carbonates in Hazine Mağara, Gümüşhane (northeast Turkey): implications for dolomitization and recrystallization
- Author
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Merve Özyurt, M. Ziya Kırmacı, and Ihsan S. Al-Aasm
- Subjects
Carbonate platform ,Dolomitization ,Geochemistry ,General Earth and Planetary Sciences ,Ecological succession ,Geology ,Cretaceous - Abstract
The Upper Jurassic – Lower Cretaceous Berdiga Formation of the Eastern Pontides, Turkey, represents a carbonate platform succession composed of pervasively dolomitized intra-shelf to deep-shelf facies. In this area, polymetallic deposits occur as veins and lenses within the Berdiga Formation in close proximity to its upper contact with the overlying formation. Three different types of replacive dolomites occur in the formation: (i) microcrystalline dolomite, (ii) fabric-preserving dolomite, and (iii) fabric-destructive dolomite. Replacive dolomites are Ca rich and nonstoichiometric (Ca56–58Mg42–44) and are characterized by a pronounced negative shift in oxygen (–11.38‰ to –4.05‰ Vienna Pee Dee Belemnite (VPDB)), δ13C values of 0.69‰ to 3.13‰ VPDB, radiogenic 87Sr/86Sr ratios (0.70753 to 0.70884), and extremely high Fe (2727–21 053 ppm) and Mn (1548–27 726 ppm) contents. All dolomite samples have low Y/Ho ratios (23–40), and they also contain highly variable contents of rare earth elements (REE) (7–41). REE patterns of dolomites normalized to Post-Archean Australian shale show a distinct positive Eu anomaly (1.3–2.1) and slightly flattened Ce anomalies (0.8–1.1). Integration of petrographic and geochemical studies reveals the history of a variety of diagenetic processes highly affected by hydrothermal alteration, which include dolomitization, recrystallization, dissolution, silicification, and pyrite mineralization associated with the emplacement of the polymetallic mineralization.
- Published
- 2019
48. Diagenesis of a limestone reservoir (Lower Cretaceous), Abu Dhabi, United Arab Emirates: Comparison between the anticline crest and flanks
- Author
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Daniel Morad, M. Paganoni, Andrea Ceriani, Mohammad Al Suwaidi, Ihsan S. Al-Aasm, Howri Mansurbeg, and Sadoon Morad
- Subjects
010506 paleontology ,Stratigraphy ,Geochemistry ,Anticline ,Geology ,010502 geochemistry & geophysics ,01 natural sciences ,Cretaceous ,Diagenesis ,Petrography ,Abu dhabi ,Crest ,0105 earth and related environmental sciences - Abstract
Petrographic, stable-isotope and fluid-inclusion analyses were conducted on a Lower Cretaceous limestone reservoir, onshore Abu Dhabi, United Arab Emirates in order to compare the diagenetic processes and products in the oil zone (i.e. crest) versus water zone (i.e. flanks) of a giant oilfield anticline. The near-seafloor, shallow and intermediate burial (
- Published
- 2019
49. Stable isotopic composition of dinosaur eggshells and pedogenic carbonates in the upper cretaceous seonso formation, South Korea: Paleoenvironmental and diagenetic implications
- Author
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Kim, Cheong-Bin, Al-Aasm, Ihsan S., Ghazban, Fereydoun, and Chang, Ho-Wan
- Published
- 2009
- Full Text
- View/download PDF
50. New insights into petroleum migration-accumulation dynamic systems and their division within petroleum systems
- Author
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Zhao, Jingzhou / 赵靖舟 and Al-aasm, Ihsan S.
- Published
- 2012
- Full Text
- View/download PDF
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