Carbon and Oxygen Stable Isotope Ratios of GSJ Carbonate Reference Materials (JCp-1 and JCt-1)

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Patterns and controls of lotic algal stable carbon isotope ratios

Spatial and temporal variations in stable carbon isotope ratios (i.e., 813C) of primary producers are common but poorly understood features of isotopic characterizations of aquatic food webs. I investigated factors that control t13C of algae (concentration and 613C of inorganic carbon, algal fractionation, and growth rates) in riffle habitats across a gradient in stream size and productivity in...

متن کامل

Continental-Scale Distributions of Vegetation Stable Carbon Isotope Ratios

All terrestrial higher plants preferentially assimilate CO 2 relative to CO 2 during photosynthesis as a result of physical and biological isotope fractionation processes, with much larger overall C fractionation by plants using the C 3 photosynthetic pathway (approximate range of 14–27‰) compared to plants using the C 4 pathway (approximate range of 3–6‰). Fractionation against CO 2 in both C ...

متن کامل

the effect of latitude on carbon, nitrogen and oxygen stable isotope ratios in foliage and in nitric- oxide ions of aerosols

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...

متن کامل

Stable isotope ratios of marijuana. I. Carbon and nitrogen stable isotopes describe growth conditions.

There remains significant uncertainty in illicit marijuana cultivation. We analyzed the delta(13)C and delta(15)N of 508 domestic samples from known U.S.A. counties, 31 seized from a single location, 5 samples grown in Mexico and Colombia, and 10 northwest border seizures. For a subset, inflorescences and leaves were analyzed separately. These data revealed a strong correspondence, with inflore...

متن کامل

Investigating Seasonality and Season of Birth in past Herds: a Reference Set of Sheep Enamel Stable Oxygen Isotope Ratios

Intra-tooth sequential analysis of enamel δO is currently used to investigate birth seasonality in past animal populations, offering new insights into seasonal availability of animal resources, herd management and seasonality of site occupation. Reference datasets are still required to address two major difficulties: (1) inter-individual variability in the record of the seasonal cycle is affect...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN

سال: 2009

ISSN: 1346-4272

DOI: 10.9795/bullgsj.59.461