نتایج جستجو برای: 825
تعداد نتایج: 1806 فیلتر نتایج به سال:
Abstract Aim Suspected biliary pathology necessitates imaging to assess for gallstones. Ultrasound is gold-standard but often limited by bowel gas/body habitus. MRCP has become popular due superior ability detect CBD stones. CT used with concerns of a wider differential diagnosis. This study aimed explore the diagnostic journey suspected gallstone patients, and whether increased furthered patie...
The abstraction of the active hydrogen of RCOCH2R by a base catalyst B M , and the subsequent formation of the enolate [RCOCHR ] M are described in Eq. 1 (deprotonation process). Secondly, the creation of a C–N bond, in which [RCOCHR ] M reacts with R ONO to form complex [RCOCHNO(OR )R ] M , is shown in Eq. 2 (C–N bond formation process). Finally, the reaction between [RCOCHNO(OR )R ] M with ba...
In this contribution, a series of isothermal compression tests for the 825 nickel-based alloy were performed using Gleeble-3800 computer-controlled thermomechanical simulator at temperature range 850 °C to 1150 and strain rate 0.14 s−1 2.72 s−1. The hot deformation equation is derived from piecewise model based on theory work hardening-dynamic recovery dynamic recrystallization (DRX), respectiv...
Tropospheric ozone observations over China from 2005 to 2010 at three pressure levels (484, 681 and 825 hPa) from the Tropospheric Emission Spectrometer on board the NASA Aura satellite have been analyzed. Fourier Transform analysis revealed the trends and seasonality of regionally-averaged, monthly-mean ozone concentrations over western, northern and southern China. Significant increases in oz...
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