نتایج جستجو برای: 15n and 13c
تعداد نتایج: 16830084 فیلتر نتایج به سال:
Stable isotopic data (?13C; ?15N) were obtained from Mesolithic human and faunal remains north- eastern Italy in order to document the diet provide information on relationship between landscape use subsistence strategies. The bone samples an adult female individual (Early Mesolithic, Late Sauveterrian) buried at Vatte di Zambana (Trento), male (Late Castelnovian) Mondeval de Sora (Belluno), Mez...
New stable carbon (?13C) and nitrogen (?15N) isotope values of charred plant bone collagen remains from 6th mill. BCE Halai, central Greece, together with datasets Kouphovouno, southern later 6th/early 5th Makriyalos, northern demonstrate how early farming communities in mainland Greece adapted mixed strategies to distinct local environmental cultural settings. Intra-site similarities differenc...
With only periodic and incomplete studies of its diet over time, all with differing methods conclusions, the degree omnivory in bank vole (Clethrionomys glareolus) is not fully clear. We assessed trophic niche species using isotopic (?15N ?13C) compositions from hair samples analysed how C. glareolus shares space herbivores, granivores insectivores living syntopically. According to numbers trap...
The novel racemic secondary alcohol (±)-2-{[4-(4-bromophenyl)-5-phenyl-4H-1,2,4-triazol-3-yl]sulfanyl}-1-phenyl-1-ethanol (12) has been successfully synthesized through S-alkylation of 4-(4-bromophenyl)-5-phenyl-4H-1,2,4-triazole-3-thiol (10) in alkaline medium with 2-bromo-1-phenylethanone followed by reduction the corresponding ketone 11. All compounds were characterized IR, 1D (1H, 13C, DEPT...
lines. While windrowed harvest residues have been shown to be effective barriers against erosion, little is Information on decomposition of harvest residues may assist in known about their decomposition kinetics and how this the maintenance of soil fertility in second rotation (2R) hoop pine plantations (Araucaria cunninghamii Aiton ex A. Cunn.) of subtropiaffects nutrient conditions in followi...
The determination of high-resolution structural models of macromolecules, obligatory for detailed structure–function studies, requires large amounts of pure, stable target protein. The two principal methods of structure determination are X-ray crystallography, a method that requires growing highly ordered 3D crystals of the target protein, and nuclear magnetic resonance (NMR) spectroscopy, a me...
Significant progress in NMR methodology for measuring spin-relaxation data at many different 15N and 13C sites in proteins demands new and increasingly sophisticated ways of data interpretation. Recent work of our group concerning the use of anisotropic and reorientational collective motional models for spin-relaxation interpretation is briefly reviewed and a number of important aspects of coll...
The coupling of the tunnelingand proton dipolar reservoirs of a weakly hindered methyl group is used to dynamically polarize the rare-spin nuclei by combination with suitable radio-frequency irradiation schemes. 1H→13C and 1H→15N double-resonance experiments below 60 K in a pure g-picoline matrix and with 1.5 % N-acetonitrile as a guest are reported at a field of 5.17 Tesla. © 2003 American Ins...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید