Tip clearance inevitably exists in helico-axial flow multiphase pumps, which generates a great impact on characteristics. To select reasonable tip and improve the transporting efficiency, different clearances (Rtc = 0.5, 1.0, 1.5 mm) are chosen to investigate behaviors hydraulic Based shear stress transport k-ω turbulence model, unsteady Reynolds averaged Navier–Stokes equations applied solve f...

A 32−year−old man in whom a perforated duodenal ulcer had been surgically closed with laparotomy 3 weeks previously pre− sented to our emergency department with symptoms of persistent epigastralgia and fever. At esophagogastroduodenoscopy, abundant whitish pus was noted stream− ing from the pylorus into the gastric an− trum (Figure 1). The source of the pus was a large duodenal ulcer in the de−...

changes (bmd) and osteoporosis .helico bacter pylori which is a known cause of gastritis and peptic ulcer osteopprosis is one major cause of bone fracture and subsequent morbidity and mortality in the elderly population. several clinical and demographic parameters including aging, menopause, parity , inflammatory disease, hormonal, gastrointestinal, renal and metabolic disorders like vitamin d ...

background: helicobacter pylori may cause many gastrointestinal problems in developing countries such as iran. we aimed to analyze the cost- effectiveness and cost- utility of the test-and-treat and empirical treatment strategies in managing helicobacter pylori infection.            methods: this was a markov based economic evaluation. effectiveness was defined as the symptoms free numbers and ...

Tip-leakage flow occurs in the tip-clearance region of helico-axial multi-phase pumps, and this reduces their working performance. In study, a structural modification, form inclusion “squealers” on impeller blade tips, was adopted to reduce tip-leakage pump, thereby improving its Numerical simulations were conducted examine impact patterns geometric parameters such as depth, shape, size squeale...

Rapid diagnosis and treatment of Helicobacter pylori (H. pylori) presents a challenge. We aimed at investigating the presence of H. pylori, susceptibility profile, and associated mutations in an effort to validate the effectiveness of GenoType HelicoDR assay in H. pylori typing in our environment. Two hundred and fifty-four biopsy specimens were cultured and DNA extracted from seventy-eight pos...

OBJECTIVES Helicobacter pylori infection has been related to an increased risk of ischaemic heart disease (IHD) possibly by raising plasma fibrinogen. The evidence for this association is conflicting. Furthermore, no attempt has been made to distinguish between an effect on atheroma and thrombosis. We have determined the association of H. pylori status with IHD assessed by coronary angiography....