نتایج جستجو برای: apj

تعداد نتایج: 745  

1998
Gianfranco Vidali Ofer Biham Itay Furman Valerio Pirronello G. Vidali

An analysis of the kinetics of H2 formation on interstellar dust grains is presented using rate equations. It is shown that semi-empirical expressions that appeared in the literature represent two different physical regimes. In particular, it is shown that the expression given by Hollenbach, Werner & Salpeter [ApJ, 163, 165 (1971)] applies when high flux, or high mobility, of H atoms on the sur...

2016
Peng Liu Yongping Qiu Juntao Hu Jiejuan Tong Zhizhong Li

The lack of human performance data in human reliability analysis (HRA) has been lamented in the literature for a long time. It can increase the variability, uncertainty, unreliability of HRA outcomes to probabilistic risk analysis (PRA). This situation is even worse for PRA/HRA in digital main control rooms (MCRs) of nuclear power plants (NPPs). Expert judgment is used when data is unavailable....

Journal: :Journal of Biological Chemistry 2000

2006
Adrian L. Melott

Stanek et al. (astro-ph/0604113) have noted that the four low-redshift longduration gamma-ray bursts (LSB) observed to date all occurred in faint, metalpoor galaxies. Given this selection, they argue that it is improbable that there has been a substantial population of Milky Way galaxy bursts sufficiently recently to affect life on Earth. This argument ignores the heterogeneity of stellar popul...

2015
Pengyun Wang Chengqi Xu Chuchu Wang Yanxia Wu Dan Wang Shanshan Chen Yuanyuan Zhao Xiaojing Wang Sisi Li Qin Yang Qiutang Zeng Xin Tu Yuhua Liao Qing K. Wang Xiang Cheng Vincenzo Lionetti

Heart failure affects 1-2% of the adult population worldwide and coronary artery disease (CAD) is the underlying etiology of heart failure in 70% of the patients. The pathway of apelin and its apelin receptor (APJ) was implicated in the pathogenesis of heart failure in animal models, but a similar role in humans is unknown. We studied a functional variant, rs9943582 (-154G/A), at the 5'-untrans...

Journal: :Cardiovascular research 2005
Euan A Ashley Jennifer Powers Mary Chen Ramendra Kundu Tom Finsterbach Anthony Caffarelli Alicia Deng Jens Eichhorn Raina Mahajan Rani Agrawal Joan Greve Robert Robbins Andrew J Patterson Daniel Bernstein Thomas Quertermous

OBJECTIVE The endogenous peptide apelin is differentially regulated in cardiovascular disease but the nature of its role in cardiac function remains unclear. METHODS We investigated the functional relevance of this peptide using ECG and respiration gated magnetic resonance imaging, conductance catheter pressure-volume hemodynamic measurements, and echocardiography in vivo. In addition, we car...

2000
Kentaro Nagamine Joseph Henry

We carry out an extensive study of the cosmic Mach number (M) on scales of R = 5, 10 and 20h−1 Mpc using an LCDM hydrodynamical simulation. We discuss the difference in the resultingM according to the different definitions ofM and the different methods of calculation. The simulated Mach numbers are slightly lower than the linear theory predictions, reflecting the non-linear evolution in the sim...

2014
HUI PANG BING HAN TAO YU ZHENKUN ZONG

It is known that apelin has definite protective effects on various cardiovascular diseases; however, the mechanism through which hypertension with heart failure (H-HF) is affected by pyroglutamylated apelin-13 (Pyr-AP13) remain unclear. Thus, in the present study, we investigated the effects of apelin on the cardiac hemodynamics in rats with hypertension and heart failure. In our study, cardiac...

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