نتایج جستجو برای: burst index
تعداد نتایج: 423633 فیلتر نتایج به سال:
Using the lag-luminosity relation and various BATSE catalogs we create a large catalog of burst redshifts, peak luminosities and emitted energies. These catalogs permit us to evaluate the lag-luminosity relation, and to study the burst energy distribution. We find that this distribution can be described as a power law with an index of α = 1.76±0.05 (95% confidence), close to the α = 2 predicted...
The purpose of this study was to investigate whether premovement facilitation of corticospinal excitability before sequential movement was different from that before simple movement. Each of 7 participants who performed choice reaction tasks with the right hand pressed a force transducer with the index finger in response to a start cue or pressed the transducers sequentially with the index fing...
Background: Echinacea purpurea has long been used in folk medicine to prevent and treat a wide range of diseases like common cold, simple cough, pulmonary infections, dermatologic disorder and even chronic diseases due to immunodeficiency. This study was conducted to check the immunomodulatory properties of hydroalcoholic extract of Echinacea purpurea in NMRI-mice challenged with Sheep Red Bl...
We present a GRANAT/SIGMA observation of the soft gamma-ray afterglow immediately after GRB 920723. The main burst is very bright. After 6 s, the burst light curve makes a smooth transition into an af-terglow where ux decays as t ?0:7. The power-law decay lasts for at least 1000 s; beyond this time, the afterglow emission is lost in the background uctuations. At least 20% of main burst energy i...
Vegetation phenology is affected by climate change and in turn feeds back on climate by affecting the annual carbon uptake by vegetation. To quantify the impact of phenology on terrestrial carbon fluxes, we calibrate a bud-burst model and embed it in the Sheffield Dynamic Global Vegetation Model (SDGVM) in order to perform carbon budget calculations. Bud-burst dates derived from the VEGETATION ...
background & objectives: neutrophils are the most important member of granulocytes & the first line of host defence against micro-organisms. they kill micro-organisms entering the body by phagocytic activity. one of the important phases of phagocytic activity is respiratory burst which can be effected by different drugs such as cimetidine. in this study the effects of cimetidine on respiratory ...
in this study, immune responses against streptococcus iniae infections in rainbow trout (oncorhynchus mykiss) were analyzed. anti-streptococcal antibody (asa) levels, respiratory burst activity (rba), phagocytic activity (pa) and phagocytic index (p index) were measured in kidney macrophages. fish were allocated to three experimental groups (n = 50 per group): survivors of natural s. iniae inf...
We present a GRANAT/SIGMA observation of the soft gamma-ray afterglow immediately after GRB 920723. The main burst is very bright. After ∼ 6 s, the burst light curve makes a smooth transition into an afterglow where flux decays as t −0.7. The power-law decay lasts for at least 1000 s; beyond this time, the afterglow emission is lost in the background fluctuations. At least ∼20% of main burst en...
According to the universal law of thermodynamics, failure any substance is closely related its energy change. Understanding strain and rock burst tendency or coal under different loading rates critical in many geological projects, such as mining, tunneling, other underground engineering project. The mechanical evolution characteristics coal-rock combined sample uniaxial compression were numeric...
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