I consider the effect of repeating burst sources on the 〈V/Vmax〉 statistic. I find that if the burst sources are distributed homogeneously in a d-dimensional space, 〈V/Vmax〉 converges to d/(d + 3) as long as the luminosity function is independent of position. Choosing the brightest event from a cluster of k events shifts the luminosity function to higher luminosities, but if the original lumino...

Background Little research has been assessed atherosclerotic risk factors at various stages of calcific aortic valve disease. This study sought to determine patients with sclerosis (AVS) and mild moderate stenosis (AS). Methods The included 1,007 diagnosed AVS or AS according echocardiographic criteria. Patients were identified as a rapid progression group if the annualized difference in peak j...

ABSTRACT In this work, we investigate the structural properties, distribution and abundance of ΛCDM dark matter subhaloes using Phi-4096 Uchuu suite N-body cosmological simulations. Thanks to combination their large volume, high mass resolution superb statistics, are able quantify – for first time consistently over more than seven decades in ratio subhalo-to-host-halo dependencies subhalo prope...

In order to clarify the influences of drip irrigation under different mulch materials on crop yield, field experiments were carried out in North China Plain for two seasons 2020 and 2021. The changes microenvironment, photosynthetic capacity, leaf biological factors, maize growth indexes analyzed with transparent film (W), black (B), straw mulching (S), a nonmulching as control (CK). results sh...

For one-dimensional propagation, a nonlinear relationship between Vmax and conduction velocity is predicted by cable theory, and, under experimental conditions, Vmax and conduction velocity may change in opposite directions. Using standard microelectrode techniques, we have measured Vmax and conduction velocity in guinea pig papillary muscles exposed to tetrodotoxin and low sodium (agents expec...

The purpose of this study was to determine whether the maximum shortening velocity (Vmax) in Hill's mechanical model (A. V. Hill. Proc. R. Soc. London Ser. B. 126: 136-195, 1938) should be scaled with activation, measured as a fraction of the maximum isometric force (Fmax). By using the quick-release method, force-velocity (F-V) relationships of the wrist flexors were gathered at five different...

Root influx parameters (Vmax and Km) of wheat (Triticum aestivum var. HD-2285) were determined at different stages of crop growth, viz. CRIS-Crown Root Initiation Stage, MTS-Maximum Tillering Stage, FLS-Flag Leaf Stage and DFS-Dough Formation Stage. Wheat was grown in sand medium with Hoagland nutrient solution (all nutrients except potassium). Plants were taken out from sand culture at 22, 41,...

Short chain fatty acids (SCFAs) are potentially valuable as a topical therapy for distal ulcerative colitis. The mechanism of action is unknown but may involve improved intracellular energy production as previous evidence indicates that colonocyte oxidation of butyrate is impaired in ulcerative colitis. No information is, however, available on human mucosal metabolism of acetate and propionate ...

The substrate recognition determinants of Ca2+/calmodulin-dependent protein kinase Ia were investigated by using peptide analogues based on the amino acid sequence around Ser-9 of synapsin I. The Km and Vmax for the synthetic peptide Leu-Arg-Arg-Arg-Leu-Ser-Asp-Ala-Asn-Phe are 3.9 microM and 18.5 mumol/(min.mg), respectively. Deletion of Leu at the -5 position lowers the Vmax/Km by 470-fold. Th...

Relations between force-velocity characteristics of the multijoint movement of the lower limbs and vertical jump performance were investigated. A total of 67 untrained subjects (age: 19.54 +/- 2.38 years; height: 166.88 +/- 8.53 cm; body mass: 59.14 +/- 10.82 kg, mean +/- SD) performed isometric and isotonic knee-hip extension movements on a servo-controlled dynamometer, and the force-velocity ...