نتایج جستجو برای: allometric ratio

تعداد نتایج: 505094  

Journal: :Journal of Physical Education 2023

Body mass is known to affect muscle strength and the outcome of some functional tests, so that heavier taller people will be stronger than lighter smaller ones. Ratio standard (RS) has been widely used remove body effect, despite long date criticism due its inadequacy. Allometry (ALLO), in turn, applied as an efficient method for normalizing muscular strength. As bench press (BP) a well-recogni...

Journal: :Evolution & development 2018
Marina Micaela Strelin Santiago Benitez-Vieyra Juan Fornoni Christian Peter Klingenberg Andrea Cocucci

The astounding variety of angiosperm flower morphologies has evolved in response to many selective forces. Flower development is highly coordinated and involves developmental associations between size and shape, ontogenetic allometry, which in turn affect the morphology of mature flowers. Although ontogenetic allometries can act as a developmental constraint and may influence adaptive evolution...

Journal: :American Zoologist 1980

2013
Cecilia P. Calabuig Andy J. Green Roberto Muriel Marco Katzenberger Juan Patino-Martinez Heden M. Moreira

The Coscoroba Swan, Coscoroba coscoroba (Molina, 1782), is a poorly known aberrant Anserine endemic to South America. We captured adult birds (189 male, 157 female) from the largest population in Brazil at the Taim Ecological Reserve, State of Rio Grande do Sul, Brazil. Different patterns between sexes can reflect differences in selection, and positive allometry may indicate that a character is...

Journal: :ecopersia 0
mahdieh ebrahimi assistant professor, department of range and watershed management, faculty of water and soil, university of zabol, zabol, iran elham miri former m.sc. student of range management, department of range and watershed management, faculty of water and soil, university of zabol, zabol, iran

the study was conducted to investigate the effect of humic acid on the germination properties of medicinal plants borago officinalis and cichorium intybus in a completely randomized design with five replications. experimental treatment comprised the following dosages 0, 15, and 30 g l-1. the results revealed that effect of humic acid on the germination properties of c. intybus was significant (p

2014
Jacopo P. MORTOLA

Aquatic and semi-aquatic mammals, while resting at the water surface or ashore, breathe with a low frequency (f) by comparison to terrestrial mammals of the same body size, the difference increasing the larger the species. Among various interpretations, it was suggested that the low-f breathing is a consequence of the end-inspiratory breath-holding pattern adopted by aquatic mammals to favour b...

Journal: :Ecological applications : a publication of the Ecological Society of America 2012
G Vieilledent R Vaudry S F D Andriamanohisoa O S Rakotonarivo H Z Randrianasolo H N Razafindrabe C Bidaud Rakotoarivony J Ebeling M Rasamoelina

Allometric equations allow aboveground tree biomass and carbon stock to be estimated from tree size. The allometric scaling theory suggests the existence of a universal power-law relationship between tree biomass and tree diameter with a fixed scaling exponent close to 8/3. In addition, generic empirical models, like Chave's or Brown's models, have been proposed for tropical forests in America ...

2007
N. Scafetta B. J. West

We show how fractal time series can naturally emerge from an input signal, which might be also random noise, when processed by some allometric mechanisms. In particular, we introduce and study the properties of allometric low and high-pass filters. We also argue that in nature pure monofractal signals could be unphysical, while bi-scaling signals might be extremely common, a fact that might be ...

Journal: :Physiological and biochemical zoology : PBZ 2010
Michael F Roberts Edwin N Lightfoot Warren P Porter

The allometric 3/4 power relation, initially used for describing the relation between mammalian basal metabolic rate and body size, is often used as a general model for organismal design. The use of allometric regression as a model has important limitations: it is not mechanistic, it combines all physiological variables into one correlate of body size, and it combines data from several physiolo...

Journal: :American journal of health-system pharmacy : AJHP : official journal of the American Society of Health-System Pharmacists 2017
Matthew L Brown Amber M Hutchison Aaron M McAtee Philippe R Gaillard Darrell T Childress

PURPOSE Results of a study comparing the performance of allometric versus consensus guideline-recommended vancomycin dosing in achieving initial trough concentrations within the desired range are reported. METHODS A retrospective study was conducted to compare selected outcomes with 2 vancomycin dosing methods: (1) dosing by total body weight, as recommended in current consensus guidelines, a...

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