Results 51 to 60 of about 41,814,406 (368)
Genetic determinants of bone mass in adults. A twin study.
Journal of Clinical Investigation, 1987 The relative importance of genetic factors in determining bone mass in different parts of the skeleton is poorly understood. Lumbar spine and proximal femur bone mineral density and forearm bone mineral content were measured by photon absorptiometry in ...
N. Pocock +5 more
semanticscholar +1 more source
Frontiers in Aging Neuroscience, 2019 Adequate cerebral blood flow (CBF) is necessary to maintain brain metabolism and function. Arterial spin labeling (ASL) is an emerging MRI technique offering a non-invasive and reliable quantification of CBF.
Jiyang Jiang +18 more
doaj +1 more source
Nature of individual difference in liability to depression in Russian adolescents [PDF]
Psychology in Russia: State of Art, 2012 The Influence of genetic and environmental factors on liability to depression inRussian teenage sample was investigated. 196 twin pairs aged 13 to 17 (M=15,2)from Moscow, Izhevsk and Bishkek took part in the survey.
Sergey B. Malykh +2 more
doaj
Twin Higgs WIMP Dark Matter [PDF]
Phys. Rev. D 92, 055034 (2015), 2015 Dark matter (DM) without a matter asymmetry is studied in the context of Twin Higgs (TH) theories in which the LHC naturalness problem is addressed. These possess a twin sector related to the Standard Model (SM) by a (broken) $\mathbb{Z}_2$ symmetry, and interacting with the SM via a specific Higgs portal.
arxiv +1 more source
Population and species neighbor identity impact trait–trait relationships and plant performance
Population Ecology, EarlyView.We evaluated how populations and species identity influence plant performance and trait outcomes in mixtures, and assessed trait variation among populations of two forb species native to the western United States (Dieteria canescens and Heterotheca villosa) following three interaction treatments (single‐population monoculture, two‐population mixture ...
Alicia J. Foxx +2 more
wiley +1 more source
Dementia risk in women higher in same‐sex than opposite‐sex twins
Alzheimer’s & Dementia: Diagnosis, Assessment & Disease Monitoring, 2020 Introduction Hormones may be one possible mechanism underlying sex differences in dementia incidence. We examined whether presumed differential prenatal hormone milieu is related to dementia risk by comparing dementia rates in same‐ and opposite‐sex ...
Jing Luo +5 more
doaj +1 more source
Progress of application of the twin method in diabetes factorial studies
Shanghai yufang yixue, 2023 Diabetes is a complex disease caused by the combined effects of genetic and environmental factors， which seriously affects people’s health level and living quality.
FENG Jingyuan, ZHU Zhenni, WU Fan
doaj +1 more source
Developmental twin study of attention problems: high heritabilities throughout development.
JAMA psychiatry, 2013 CONTEXT The genetic and environmental link between attention-deficit/hyperactivity disorder in childhood and the adult manifestation of the disorder is poorly understood because of a lack of longitudinal studies with cross-informant data.
Z. Chang +3 more
semanticscholar +1 more source
Dendritic cells steering antigen and leukocyte traffic in lymph nodes
FEBS Letters, EarlyView.Dendritic cells are key players in the activation of T cells and their commitment to effector function. In this In a Nutshell Review, we will discuss how dendritic cells guide the trafficking of antigen and leukocytes in the lymph node, thus influencing T‐cell activation processes. Dendritic cells (DCs) play a central role in initiating and shaping the
Enrico Dotta +3 more
wiley +1 more source
The Nature and Nurture of Congenital Amusia: A Twin Case Study
Frontiers in Behavioral Neuroscience, 2018 In this article, we report the first documented case of congenital amusia in dizygotic twins. The female twin pair was 27 years old at the time of testing, with normal hearing and above average intelligence. Both had formal music lesson from the age of 8–
Jasmin Pfeifer +2 more
doaj +1 more source