Results 111 to 120 of about 23,904 (309)

Experimental Study on Radial Cementation Strength of the First Cementing Interface in HTHP Wells

open access: yesShiyou jixie, 2021
In view of the stress status of cement ring in high-temperature and high-temperature(HTHP)wells, a set of full-size HTHP cement ring sealing integrity evaluation test equipment was developed. The influence of confining pressure and casing pressure on the
Huang Peng   +4 more
doaj  

Experimental research on influences of suction on deformation characteristics of loess under unloading-reloading conditions

open access: yesYantu gongcheng xuebao, 2017
In order to explore the influences of matrix suction and net confining pressure on the deformation-strength and unloading-reloading modulus of loess, three groups of 27 tests are performed using the unsaturated triaxial apparatus for undisturbed Q3 loess
GUO Nan 1, CHEN Zheng-han 1,2, GAO Deng-hui1 , ZHOU Yong 1, YANG Xiao-hui 1, HU Sheng-xia 3
doaj   +1 more source

Electron transfer between complexes III and IV in S. cerevisiae mitochondrial membranes

open access: yesFEBS Letters, EarlyView.
Mitochondrial oxidative phosphorylation in S. cerevisiae mitoplasts is limited by complex IV catalytic capacity, rather than two‐dimensional cytochrome c diffusion. At physiological cytochrome c : supercomplex ratios at salinity equivalent to that of 20 mm monovalent salt, activity is maximized, indicating that this low ionic strength accurately mimics
Ana Paula Lobez   +2 more
wiley   +1 more source

Pore water pressure-strain curves for the three soil types under the same confining pressure.

open access: yes
Pore water pressure-strain curves for the three soil types under the same confining pressure.
Enlong Liu (14019700)   +2 more
core   +1 more source

Pressure-confined Lyman-alpha clouds

open access: yesThe Astrophysical Journal, 1989
Results are presented of numerical models of pressure-confined spherical gas clouds which produce absorption resembling the low to intermediate atomic column density lines found in high-redshift QSO spectra. One-dimensional hydrodynamical models including electron conduction are described, and the rate equations are solved to find ionization and ...
E. Baron   +3 more
openaire   +1 more source

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

open access: yesFEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace   +6 more
wiley   +1 more source

Effect of the Confining Pressure on the Dynamic Compression Properties of Transversely Isotropic Rocks

open access: yes, 2019
The dynamic compression properties of transversely isotropic rocks and their dependence on the confining pressure and bedding directivity are important in deep underground engineering activities.
Cong Zhang   +4 more
core   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

open access: yesFEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa   +2 more
wiley   +1 more source

Energy Analysis on Dynamic Fragmentation Degree of Cemented Sand Specimens under Confining Pressure

open access: yes, 2019
In order to study the fragmentation energy dissipation characteristics of cemented sand specimens under confining pressure and impact loads, the energy consumption of cemented sand specimens was analyzed through an impact compression and split test ...
Ying Xu, Jinjin Ge, Wei Huang
core   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

open access: yesFEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee   +7 more
wiley   +1 more source

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