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Beilstein Journal of Nanotechnology (1)
Cases Journal (1)
Saudi Journal of Gastroenterology : Official Journal of the Saudi Gastroenterology Association (1)
Hussain, Amir (3)
Begum, Anayara (1)
Chishty, Wajahat H. (1)
Dalmia, Sanjay (1)
Patton, Michael (1)
Rahman, Atowar (1)
Shah, Amir A. (1)
Year of Publication
Effect of deposition temperature on the structural and optical properties of chemically prepared nanocrystalline lead selenide thin films
Beilstein Journal of Nanotechnology
Nanocrystalline lead selenide (PbSe) thin films were prepared on glass substrates by a chemical bath deposition method, using sodium selenosulfate (Na2SeSO3) as a source of Se2− ions, and lead acetate as a source of Pb2+ ions. Trisodium citrate (TSC) was used as a complexing agent. PbSe films were prepared at various deposition temperatures while the pH value was kept fixed at 11, and the effect on the resulting film properties was studied by X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and optical absorption studies. The structural parameters, such as the lattice constant (a), crystallite size (D), dislocation density (ρ) and microstrain (ε) were evaluated from the XRD spectra. It was found that average crystallite size, as calculated from Scherrer’s formula, increased from 23 to 33 nm as the deposition temperature was varied from 303 to 343 K. The dislocation density and microstrain were found to vary inversely with the crystallite size, whereas the lattice constant was found to increase with an increase in crystallite size. The optical absorption spectra of the nanocrystalline PbSe films showed a blue shift, and the optical band gap (E g ) was found to increase from 1.96 to 2.10 eV with the decrease in crystallite size.
chemical bath deposition; lattice parameter; lead selenide; Nelson–Riley plot; optical absorption
Analysis of Elevated Liver Enzymes in an Acute Medical Setting: Jaundice May Indicate Increased Survival in Elderly Patients with Bacterial Sepsis
Shah, Amir A.
Chishty, Wajahat H.
Saudi Journal of Gastroenterology : Official Journal of the Saudi Gastroenterology Association
It has been shown previously that in primary care settings in UK abnormal liver enzymes are not adequately investigated and followed up; hence potentially treatable chronic liver diseases remain undiagnosed. No such published data is available with regard to secondary care settings. The aims of this audit were, to determine if the current practice in our hospital with regards to investigation, management and follow-up of patients with elevated liver enzymes is in accordance with American Gastroenterology Association (AGA) guidelines and to analyze the effect of age and elevated parameters of liver blood tests on mortality in patients with bacterial sepsis.
Materials and Methods:
A total of 4816 patients were admitted to our acute medical receiving unit during a period of 6 months, of which 378 were with elevated liver enzymes.
Results and Conclusion:
The common conditions that resulted in elevated liver enzymes were sepsis (123) and alcohol-related liver diseases (120). All patients with elevated parameters of liver function tests (LFTs) were fully investigated, managed and followed up in accordance with AGA guidelines. In addition, in patients with bacterial sepsis, old age was associated with increased mortality, while development of jaundice in elderly patients with bacterial sepsis was associated with increased survival.
Alcohol-related liver disease; elevated LFTs; septicemia in elderly
Small bowel infarction due to fibro muscular dysplasia: a case report and literature review
We describe a rare case of small bowel infarction due to fibro muscular dysplasia in superior mesenteric artery in a young patient.
A 28 year old Asian female presented with acute onset left sided abdominal pain and watery diarrhea. She had a laparotomy due to further deterioration. It showed infracted small intestine, gall bladder and parts of liver. Abdomen had to be closed without any therapeutic procedure. She died in early post operative period. Autopsy showed fibro muscular dysplasia of superior mesenteric artery.
Fibro muscular dysplasia of SMA is rare, is treatable but has a high mortality.
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