نتایج جستجو برای: allometric ratio

تعداد نتایج: 505094  

Journal: :Neotropical entomology 2008
Mónica S Iglesias María S Gaspe Alejandra C Valverde

The multivariate allometric growth patterns from longitudinal data of leg and rostral segments of all instars of Belostoma elegans (Mayr) and B. cummingsi De Carlo are presented for the first time, and the allometric coefficients are compared. The segments of the middle and hind legs present allometric coefficients with opposite polarity to those of forelegs. This discrepancy in the ontogenetic...

2006
Xiaoyang Zhang Shobha Kondragunta

[1] Spatially-distributed forest biomass components are essential to understand carbon cycle and the impact of biomass burning emissions on air quality. We estimated the density of forest biomass components (foliage biomass, branch biomass, and aboveground biomass) at a spatial resolution of 1 km across the Contiguous United States using foliage-based generalized allometric models and Moderate-...

Journal: :Polish journal of veterinary sciences 2014
S Yohannes Md Akil Hossain J Y Kim S J Lee D M Kwak J W Suh S C Park

The association between physiologically dependent pharmacokinetic parameters (CL(B), T1/2beta, Vd(ss)) of marbofloxacin and body weight was studied in eight animal species based on allometric equation Y = aWb, where 'Y' is the pharmacokinetic parameter, 'W' is body weight, 'a' is allometric coefficient (intercept) and 'b' is the exponent that describes relation between pharmacokinetic parameter...

2011
M Battán Horenstein Av Peretti

The objective of this research was to study variations in allometry of body characters in females and males of two populations of blow flies, Chrysomya albiceps (Wiedemann) (Diptera: Calliphoridae), under different environmental conditions to establish patterns of morphological variation. Body size of both males and females in the experimental population was significantly higher than in the ind...

2009
Jiang Zhang

Allometric scaling is an important universal property of metabolic living systems. It also describes the self-similar branching tree-liked structures in transportation networks. This paper presented a new approach to calculate the allometric scaling power law relations for arbitrary flow networks. This method can not only avoid the shortcoming of losing lots of information in the process of gen...

2013
Lubomir D. Lashev Anelyia M. Haritova

Submitted: Nov 23, 2012; Accepted: Jan 5, 2013; Published: Aug 5, 2013 Abstract: Allometric analysis of the total body clearance (Cl ), steady-state volume of distribution (V ) and B ss elimination half-life (t ) based on the literature data in fish species was performed for oxolinic acid, flumequine, 1/2 enrofloxacin. Values of Cl and V show allometric dependence on body weight but values of t...

Journal: :The anatomical record. Part A, Discoveries in molecular, cellular, and evolutionary biology 2004
Antonio Rosas Markus Bastir

Allometry is an important factor of morphological integration that contributes to the organization of the phenotype and its variation. Variation in the allometric shape of the mandible is particularly important in hominid evolution because the mandible carries important taxonomic traits. Some of these traits are known to covary with size, particularly the retromolar space, symphyseal curvature,...

Journal: :Annals of botany 2011
Qian Zhang Lu Zhang Jacob Weiner Jianjun Tang Xin Chen

BACKGROUND AND AIMS Plant biomass-density relationships during self-thinning are determined mainly by allometry. Both allometry and biomass-density relationship have been shown to vary with abiotic conditions, but the effects of biotic interactions have not been investigated. Arbuscular mycorrhizal fungi (AMF) can promote plant growth and affect plant form. Here experiments were carried out to ...

2016
J. Häggström Å.O. Andersson T. Falk L. Nilsfors U. OIsson J.G. Kresken K. Höglund M. Rishniw A. Tidholm I. Ljungvall

BACKGROUND Echocardiography is a cost-efficient method to screen cats for presence of heart disease. Current reference intervals for feline cardiac dimensions do not account for body weight (BW). OBJECTIVE To study the effect of BW on heart rate (HR), aortic (Ao), left atrial (LA) and ventricular (LV) linear dimensions in cats, and to calculate 95% prediction intervals for these variables in ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2006
Chet C Sherwood Cheryl D Stimpson Mary Ann Raghanti Derek E Wildman Monica Uddin Lawrence I Grossman Morris Goodman John C Redmond Christopher J Bonar Joseph M Erwin Patrick R Hof

Evidence from comparative studies of gene expression and evolution suggest that human neocortical neurons may be characterized by unusually high levels of energy metabolism. The current study examined whether there is a disproportionate increase in glial cell density in the human frontal cortex in comparison with other anthropoid primate species (New World monkeys, Old World monkeys, and homino...

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