نتایج جستجو برای: environmental variance

تعداد نتایج: 470254  

Journal: :American journal of health promotion : AJHP 2003
Ilse De Bourdeaudhuij James F Sallis Brian E Saelens

PURPOSE This study investigated the variance in sitting, walking, and moderate and vigorous physical activity explained by neighborhood design and recreational environmental variables above and beyond the variance accounted for by individual demographic variables. DESIGN Cross-sectional analyses of self-reported survey data. SETTING A random sample of inhabitants of Ghent, Belgium, aged 18-...

Journal: :پژوهش های علوم دامی ایران 0
فاطمه کاظمی برزل آباد سعید حسنی فیروز صمدی مجتبی آهنی آذری داوود علی ساقی

introduction milk solid no-fat is economically very important in cheese industry. compared to the other kinds of milk, ewe’s milk contains higher amount of milk solids no-fat. milk solids no-fat (msnf) contains lactose, caseins, whey proteins, and minerals. the use of test day records in random regression method has several benefits including flexibility to account for the environmental and gen...

Journal: :Journal of personality and social psychology 1998
J M Beer R D Arnold J C Loehlin

In general, the shared family environment appears to play a negligible role in determining individual differences in personality and interests. Nevertheless, scattered reports of significant shared environmental influence on such variables appear in the literature. Using data from the Texas Adoption Project (TAP), the current study attempted to replicate twin study findings of significant share...

Journal: :Twin research and human genetics : the official journal of the International Society for Twin Studies 2009
Jaqueline M Vink Annemieke S Staphorsius Dorret I Boomsma

Caffeine is by far the most commonly used psychoactive substance. Caffeine is consumed regularly as an ingredient of coffee. Coffee consumption and coffee preference was explored in a sample of 4,495 twins (including 1,231 pairs) registered with the Netherlands Twin Registry. Twin resemblance was assessed by tetrachoric correlations and the influence of both genetic and environmental factors wa...

Journal: :The American journal of clinical nutrition 2005
Paul W Franks Eric Ravussin Robert L Hanson Inge T Harper David B Allison William C Knowler P Antonio Tataranni Arline D Salbe

BACKGROUND Understanding the factors that contribute to physical inactivity in children is important because sedentary behavior strongly relates to metabolic disorders such as obesity and diabetes. OBJECTIVE We aimed to quantify the genetic and environmental influences on physical activity energy expenditure (PAEE) in 100 sex-concordant dizygotic (n = 38) and monozygotic (n = 62) twin pairs a...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Jake M Ferguson José M Ponciano

Environmental stochasticity is an important concept in population dynamics, providing a quantitative model of the extrinsic fluctuations driving population abundances. It is typically formulated as a stochastic perturbation to the maximum reproductive rate, leading to a population variance that scales quadratically with abundance. However, environmental fluctuations may also drive changes in th...

Journal: :Personality and individual differences 2014
Sara A Hart Amy J Mikolajewski Wendy Johnson Christopher Schatschneider Jeanette Taylor

The association between poorer academic outcomes and having antisocial friends is reliably demonstrated yet not well understood. Genetically sensitive designs uniquely allow for measuring genetic vulnerabilities and/or environmental risk in the association of antisocial friend behavior and poor school achievement, allowing for a better understanding of the nature of the association. This study ...

Journal: :Psychiatry research 2014
Davy Vancampfort Marc De Hert Amber De Herdt Andrew Soundy Brendon Stubbs Paquito Bernard Michel Probst

Sitting behaviours may, independent of physical activity behaviours, be a distinct risk factor for multiple adverse health outcomes in patients with schizophrenia. In order to combat sitting behaviours health care providers and policy makers require further understanding of its determinants in this population group. The aim of the present study was to investigate the variance in sitting time ex...

Journal: :Review of Finance 2017

حمید دهقانی, , احمد یوسفی, , مجید شاه‌محمدی, ,

To determine yield stability and to evaluate genotype interaction with environment interaction, 18 genotype of barley (Hordeum vulgare L.) and a control group were evaluated in a randomized complete block design with 4 replications in 3 successive years (1997-2000) at 10 research stations. Simple and combined analysis of variance revealed significant genetic differences between yield genotypes ...

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