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AIMS65: A promising upper gastrointestinal bleeding risk score but further validation required

World Journal of Gastroenterology 2014年第39期20卷 14515-14516页

作者： ray boyapati Avik Majumdar Marcus Robertson Department of Gastroenterology and Liver Transplant Austin Hospital Heidelberg VIC 3084 Australia

A novel upper gastrointestinal bleeding risk stratification score(AIMS65) has recently been developed and validated. It has advantages over existing risk scores including being easy to remember and lack of subjectivity in calculation. We comment on a recent study that has cast doubt on the applicability of AIMS65 in the peptic ulcer disease population. Although promising, further studies are required to evaluate the validity of AIMS65 in various populations.

关键词： Gastrointestinal haemorrhage AIMS65 Endoscopy Prognosis Hemostasis Gastrointestinal bleeding

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One fifth of hospitalizations for peptic ulcer-related bleeding are potentially preventable

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World Journal of Gastroenterology 2014年第30期20卷 10504-10511页

作者： ray boyapati Sim Ye Ong Bei Ye Anuk Kruavit Nora Lee Rhys Vaughan Sanjay Nurkar Peter Gibson Mayur Garg Gastroenterology and Liver Transplant Unit Austin HospitalMelbourneVictoria 3128Australia Department of Gastroenterology and Hepatology Eastern Health and Monash UniversityMelbourneVictoria 3128Australia Department of Gastroenterology The Alfred Hospital and Monash UniversityMelbourneVictoria 3128Australia

AIM: To calculate the proportion of potentially preventable hospitalizations due to peptic ulcer disease (PUD), erosive gastritis (EG) or duodenitis (ED).

关键词： Peptic ulcer Gastrointestinal hemorrhage Prevention Non-steroidal anti-inflammatory drug Proton pump inhibitor Gastroprotection

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Surface Analysis of Carbon Steel Protected from Corrosion by a New Ternary Inhibitor Formulation Containing Phosphonated Glycine, Zn<sup>2+</sup>and Citrate

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Journal of Surface Engineered Materials and Advanced Technology 2013年第1期3卷 28-42页

作者： boyapati Venkata Appa Rao Madala Venkateswara Rao Sirugudu Srinivasa Rao Bojja Sreedhar Department of Chemistry Andhra Loyola College Vijayawada India Department of Chemistry National Institute of Technology Warangal India Department of Chemistry V. R. Siddhartha Engineering College Vijyawada India Inorganic & Physical Chemistry Division Indian Institute of Chemical Technology Hyderabad India

Studies on surface analysis of carbon steel protected from corrosion in low chloride and nearly neutral aqueous environment by a synergistic mixture containing N,N-bis(phosphonomethyl) glycine (BPMG), zinc ions and citrate ions are presented. The effect of addition of citrate to the binary system, BPMG-Zn2+, is quite significant and is well explored through various studies. The surface protective nature is maintained in the pH range 5 - 9. Potentiodynamic polarization studies inferred that the ternary inhibitor is a mixed inhibitor. Impedance studies of the metal/solution interface indicated that the surface film is highly protective against the corrosion of carbon steel in the chosen environment. X-ray photoelectron spectroscopic (XPS) analysis of the surface film showed the presence of the elements namely iron, phosphorus, nitrogen, carbon, oxygen and zinc. Deconvolution spectra of these elements in the surface film inferred the presence of oxides/hydroxides of iron(III), Zn(OH)2 and [Fe(III), Zn(II)-BPMG-citrate] heteropolynuclear multiligand complex. This inference is further supported by the reflection absorption Fourier transform infrared spectrum of the surface film. Analysis by scanning electron microscopy (SEM) is presented for both the corroded and protected metal surfaces. Based on all these results, a plausible mechanism of corrosion inhibition is proposed.

关键词： Carbon Steel Corrosion Inhibitor Protective Film Synergism BPMG Citrate

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