نتایج جستجو برای: perspect
تعداد نتایج: 642 فیلتر نتایج به سال:
Spin-Coupled Generalized Valence Bond (SCGVB) theory provides the foundation for a comprehensive of electronic structure molecules. SCGVB offers compelling orbital description molecules as well an efficient and effective zero-order wave function calculations striving quantitative predictions molecular structures, energetics, other properties. The orbitals in are usually semilocalized, most mole...
Correspondence: E-mail: [email protected] Abstract Loss of traits can dramatically alter the fate of species. Evidence is rapidly accumulating that the prevalence of trait loss is grossly underestimated. New findings demonstrate that traits can be lost without affecting the external phenotype, provided the lost function is compensated for by species interactions. This is important because trait lo...
Robert E. Ulanowicz,* Robert D. Holt and Michael Barfield Abstract Articulating what limits the length of trophic food chains has remained one of the most enduring challenges in ecology. Mere counts of ecosystem species and transfers have not much illumined the issue, in part because magnitudes of trophic transfers vary by orders of magnitude in powerlaw fashion. We address this issue by creati...
Jessica L. Green and Joshua B. Plotkin* Center for Ecology and Evolutionary Biology, University of Oregon, Eugene, OR, USA Department of Biology, University of Pennsylvania, 433 S. University Ave., Philadelphia, PA 19104, USA *Correspondence: E-mail: [email protected] Abstract The pattern of species abundances is central to ecology. But direct measurements of species abundances at ecologic...
James S. Clark Nicholas School of the Environment and Department of Biology, Duke University, Durham, NC 27708, USA Correspondence: E-mail: [email protected] Abstract Advances in computational statistics provide a general framework for the highdimensional models typically needed for ecological inference and prediction. Hierarchical Bayes (HB) represents a modelling structure with capacity to ex...
The technique of (109)Cd-based X-ray fluorescence (XRF) measurements of lead in bone is well established. A paper by some XRF researchers [Gordon CL, et al. The Reproducibility of (109)Cd-based X-ray Fluorescence Measurements of Bone Lead. Environ Health Perspect 102:690-694 (1994)] presented the currently practiced method for calculating the variance of an in vivo measurement once a calibratio...
endogenous b-catenin aggravates acute kidney injury in mice. Kidney Int 82: 537–547, 2012 13. Terada Y, Tanaka H,Okado T, ShimamuraH, Inoshita S, KuwaharaM, Sasaki S: Expression and function of the developmental gene Wnt-4 during experimental acute renal failure in rats. JAmSocNephrol14: 1223–1233, 2003 14. Cerpa W, Toledo EM, Varela-Nallar L, Inestrosa NC: The role of Wnt signaling in neuropro...
This paper summarizes two roundtable discussions held at the conclusion of the International Conference on Biopersistence of Respirable Synthetic Fibres and Minerals. The first round table addressed the role of biopersistence in the pathogenicity of fiber-induced disease. The panel included T. W. Hesterberg (Chairman), J.M.G. Davis, K. Donaldson, B. Fubini, N.F. Johnson, G. Oberdoerster, P. Séb...
1. Pachauri S. Unmet reproductive and sexual health needs in South Asia. J Health Popul Dev Ctries 1998; 1:29-39. 2. Singh S. Adolescent childbearing in developing countries: a global review. Stud Fam Plann 1998; 29: 117-36. 3. Jeejeebhoy SJ. Adolescent sexual and reproductive behaviour. International Centre for Research on Women Working Paper 3; Washington DC: 1996. 4. Shaikh BT, Rahim ST. Ass...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید