The structure of Ca(2+)-ATPase has been studied by electron microscopy of two different crystal forms: one tubular form induced by vanadate in native sarcoplasmic reticulum (SR) membranes and another multilamellar form grown from detergent-solubilized SR. To determine the conformation of Ca(2+)-ATPase within each crystal form, the respective effects of Ca2+, thapsigargin, adenosine 5'-(beta, ga...

The vortex-ingesting stirred tank reactor uses a combination of a helical screw impeller and concentric draft-tube to entrain and recycle headspace gas and disperse it as bubbles in a liquid reaction solvent. This study presents an experimental characterisation of a 0.29 m diameter vortex-ingesting gas-liquid stirred reactor, operated with solids mass fractions from 0 to 25%, over a range of sp...

Metal droplet-based 3D printing provides unique advantages for fabricating micro complex parts. Especially, assisted by soluble support, structures with high-quality inner surfaces can be directly printed without post-processing, which is very promising the fabrication of waveguides and antenna horns. Here, a spatially distributed equidistant helical deposition strategy only one-step positionin...

The main focus of this research is to modify the straight pipe Citronella essential oil distillation condenser using a helical coil shorten time. This study aims obtain an effective shell-side fluid volumetric rate shell side varies from 0.72 3.66 LPM at constant pitch ratio 2.10. Recording data in form temperature, water, and tube steam after steady state reached. experimental results show tha...

Micro-hole fabrication at a high speed and accuracy of machining while maintaining surface quality is challenging. A core difficulty the removal products from extremely narrow gaps. To solve this problem, study proposes an approach that combines high-speed electrical discharge (EDM) with electrochemical (ECM) by using helical tube electrode matched internal external flushing. During drilling, m...

Ion mobility measurements have been performed for protonated polyalanine peptides (A10 + H+, A15 + H+, A20 + H+, A25 + H+, and A15NH2 + H+) as a function of temperature using a new high-temperature drift tube. Peaks due to helices and globules were found at room temperature for all peptides, except for A10 + H+ (where only the globule is present). As the temperature is increased, the helix and ...

OBJECTIVE To assess the performance of a high-definition CT (HDCT) for imaging small caliber coronary stents (≤ 3 mm) by comparing different scan modes of a conventional 64-row standard-definition CT (SDCT). MATERIALS AND METHODS A cardiac phantom with twelve stents (2.5 mm and 3.0 mm in diameter) was scanned by HDCT and SDCT. The scan modes were retrospective electrocardiography (ECG)-gated ...

The amino-terminal interaction modules of Pelle and Tube show limited amino acid sequence similarity to death domains, a family of folds identified in proteins Tsan Xiao,* Par Towb,† Steven A. Wasserman,† and Stephen R. Sprang*‡ *The Howard Hughes Medical Institute and Department of Biochemistry that assemble components of apoptotic signaling pathways (Tartaglia et al., 1993; Feinstein et al., ...

Abstract A new method of broad banding a helix TWT is suggested in which, instead shaping the dispersion characteristics helical structure by using tapered geometry dielectric helix-support rods, two-stage loading provided severing two sections each with conventional supports here typically wedge cross section. One was heavily loaded compared to other section so that gain peaks on frequency sca...

objective the purpose of this study was to assess the frequency of complications of endotracheal intubation (eti) in neonates. methods the newborns that were admitted and needed urgent or semi-urgent intubation were enrolled in this study over a 1 year period. route for intubation in all cases were orotracheal. cases were not routinely sedated or paralyzed. the patients were clinically and radi...