نتایج جستجو برای: stable oxygen and carbon isotope

تعداد نتایج: 16944832  

2016
Autumn Oczkowski Betty Kreakie Richard A. McKinney Jerry Prezioso

Citation: Oczkowski A, Kreakie B, McKinney RA and Prezioso J (2016) Patterns in Stable Isotope Values of Nitrogen and Carbon in Particulate Matter from the Northwest Atlantic Continental Shelf, from the Gulf of Maine to Cape Hatteras. Front. Mar. Sci. 3:252. doi: 10.3389/fmars.2016.00252 Patterns in Stable Isotope Values of Nitrogen and Carbon in Particulate Matter from the Northwest Atlantic C...

Journal: :international journal of environmental research 0
h. katsura the united graduate school of agricultural science, tokyo university of agriculture & technology, saiwai-cho 3-chome, fuchu-shi, tokyo 183-8509, japan, university of tsukuba s.h.s. at sakado, chiyoda 1-chome, sakado-shi, saitama-ken 350-0214, japan

it is very important to determine the stable nitrogen isotope ratio for the nitrogenous substances in aerosols and the geochemistry behavior of stable nitrate ion isotopes in aerosols in order to elucidate the chemical and physical functions of clouds. hence, aerosol field sampling was conducted in the skies offshore from malibu beach and santa barbara, california, u.s.a. on 16 and 18 july 2009...

Journal: :American journal of physical anthropology 2012
Roberta Lelli Richard Allen Gianfranco Biondi Mauro Calattini Cecilia Conati Barbaro Maria Antonia Gorgoglione Alessandra Manfredini Cristina Martínez-Labarga Francesca Radina Mara Silvestrini Carlo Tozzi Olga Rickards Oliver E Craig

Stable isotope analysis of human remains has been used to address long-standing debates regarding the speed and degree to which the introduction of farming transformed diet. In Europe, this debate has centered on northern and Atlantic regions with much less attention devoted to the arrival of farming across the Mediterranean. This study presents carbon and nitrogen stable isotope analyses of co...

2010
S. Gromov A. M. Brenninkmeijer

Isotope composition, in many cases, holds unique information on the sources, chemical modification and sinks of atmospheric trace gases. Vital to the interpretation and use of an increasing number of isotope analyses is appropriate modelling. However, the exact implementation of isotopic information in chemistry-climate models is a challenge, and often studies use simplifications which limit th...

Journal: :Environmental science & technology 2002
Donald L Song Mark E Conrad Kent S Sorenson Lisa Alvarez-Cohen

Time-series stable carbon isotope monitoring of volatile organic compounds (VOCs) atthe Idaho National Engineering and Environmental Laboratory's (INEEL) field site Test Area North (TAN) was conducted during a pilot study to investigate the treatment potential of using lactate to stimulate in situ biologic reductive dechlorination of trichloroethene (TCE). The isotope ratios of TCE and its biod...

Journal: :Journal of forensic sciences 2004
Helen W Kreuzer-Martin Lesley A Chesson Michael J Lott Janet V Dorigan James R Ehleringer

The stable isotope ratios of a seized pathogen culture could potentially reveal information about the environment in which the agent was produced. In this paper we describe general relationships between stable isotopes of carbon, nitrogen, and hydrogen in bacteriological culture media and spores of Bacillus subtilis, an endospore-forming soil bacterium. In numerous media that varied both in nut...

Journal: :Rapid communications in mass spectrometry : RCM 2014
Dana F C Riechelmann Michael Maus Willi Dindorf Bernd R Schöne Denis Scholz Jan Esper

RATIONALE Milling of wood samples is a widely applied preparation method for pooling tree-rings from different trees or periods of several years for determination of δ(13)C and δ(18)O values. In this study, whole wood samples were milled using different procedures in order to evaluate potential effects of this preparation method on δ(13)C and δ(18)O values. METHODS Subsamples of a 5 cm(3) woo...

Journal: Geopersia 2019

Rhythmical alternations between limestone and marls characterize the Pabdeh Formation, southwestern Iran. Three intervals of these rhythmites were studied using sedimentary, petrography and geochemical parameters analysis, to unravel the possible mechanisms responsible for the origin of these rhythmites. The microfacies analysis reflects calm deep-water sedimentation that were interrupted by sp...

Journal: :Rapid communications in mass spectrometry : RCM 2005
Gabriel J Bowen David A Winter Howard J Spero Robert A Zierenberg Mathew D Reeder Thure E Cerling James R Ehleringer

Bottled and packaged waters are an increasingly significant component of the human diet. These products are regulated at the regional, national, and international levels, and determining the authenticity of marketing and labeling claims represents a challenge to regulatory agencies. Here, we present a dataset of stable isotope ratios for bottled waters sampled worldwide, and consider potential ...

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