نتایج جستجو برای: stable isotope analysis

تعداد نتایج: 3044529  

E. Calizza L. Rossi M. Jafari M.L. Costantini V. Jafari,

The application of stable isotope analysis (SIA) has become a standard scientific approach in Agricultural and Ecological researches and, more in general, in several disciplines such as biology, botany, zoology, organic chemistry, climatology, and nutrition. The main objectives of this paper are (1) to provide a simple definition of stable isotopes and (2) to illustrate analytical measurement m...

Journal: :مطالعات باستان شناسی 0
هادی زندکریمی دانش آموختۀ کارشناسی ارشد باستان سنجی دانشگاه هنر اسلامی تبریز مسعود باقرزاده کثیری استادیار گروه باستان سنجی دانشگاه هنر اسلامی تبریز بهرام آجورلو استادیار گروه باستان سنجی دانشگاه هنر اسلامی تبریز بهروز عمرانی استادیار پژوهشکده سازمان میراث فرهنگی، صنایع دستی و گردشگری

stable isotope analysis, being used in many research areas, has also been applied in archaeology during the last three decades to address questions regarding the paleoclimatology and ancient diet, mobility and migration. despite the growing number of the application of stable isotope analysis in archaeological studies, there is a very few research in this regard in archaeology of iran. this res...

Journal: :international journal of environmental research 2012
h. katsura

cosmic rays in the upper troposphere (9000 meters to 15000 meters) initiate the followingnuclear chemical reaction: 1n + 14n => 14c + 1h. previous research has shown a strong effect of latitude onthe abundance of neutrons from cosmic rays. however, to date, there has been little exploration of therelationship between the latitude effect for cosmic-ray neutrons and latitudinal variations of stab...

2011
Caroline M. Hammerschlag-Peyer Lauren A. Yeager Márcio S. Araújo Craig A. Layman

Ontogenetic niche shifts occur across diverse taxonomic groups, and can have critical implications for population dynamics, community structure, and ecosystem function. In this study, we provide a hypothesis-testing framework combining univariate and multivariate analyses to examine ontogenetic niche shifts using stable isotope ratios. This framework is based on three distinct ontogenetic niche...

Journal: :Current Genomics 2008
Keiji Kito Takashi Ito

Mass spectrometry has served as a major tool for the discipline of proteomics to catalogue proteins in an unprecedented scale. With chemical and metabolic techniques for stable isotope labeling developed over the past decade, it is now routinely used as a method for relative quantification to provide valuable information on alteration of protein abundance in a proteome-wide scale. More recently...

Journal: :geopersia 2013
forough malek mahmoodi mahmoud khalili akramossadat mirlohi

bentonite deposits of economic interest are widespread in tashtab mountains (khur), east of isfahan province, iran. several bentonite deposits have been developed in this area as a result of eocene volcanic alteration. these deposits are classified as khur bentonite horizon. xrd analyses reveal that alteration products consist of na-montmorillonite, kaolinite, quartz, calcite, and crystobalite....

2017
Jesse P. Harrison David Berry

Vibrational spectroscopy is increasingly used for the rapid and non-destructive imaging of environmental and medical samples. Both Raman and Fourier-transform infrared (FT-IR) imaging have been applied to obtain detailed information on the chemical composition of biological materials, ranging from single microbial cells to tissues. Due to its compatibility with methods such as stable isotope la...

2017
Eivydas Andriukonis Elena Gorokhova

Stable isotope labeling is a standard technique for tracing material transfer in molecular, ecological and biogeochemical studies. The main assumption in this approach is that the enrichment with a heavy isotope has no effect on the organism metabolism and growth, which is not consistent with current theoretical and empirical knowledge on kinetic isotope effects. Here, we demonstrate profound c...

2018
Patrick Roberts Ricardo Fernandes Oliver E Craig Thomas Larsen Alexandre Lucquin Jillian Swift Jana Zech

Stable isotope analysis has been utilized in archaeology since the 1970s, yet standardized protocols for terminology, sampling, pretreatment evaluation, calibration, quality assurance and control, data presentation, and graphical or statistical treatment still remain lacking in archaeological applications. Here, we present recommendations and requirements for each of these in the archaeological...

Journal: :Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids 2017

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