Results 31 to 40 of about 70,737 (245)

Isotope Engineering of Carbon Nanotube Systems [PDF]

Physical Review Letters, 2005
4 pages, 4 ...
Simon, F., Kramberger, Ch., Pfeiffer, R., Kuzmany, H., Zolyomi, V., Kurti, J., Singer, P. M., Alloul, H.   +7 more
openaire   +3 more sources

The dissolution of olivine added to soil at 32°C: the fate of weathering products and its implications for enhanced weathering at different temperatures

Frontiers in Climate
The amendment of agricultural soils by crushed silicate minerals has been proposed to enhance weathering rates and facilitate carbon dioxide (CO2) removal from the atmosphere. Laboratory dissolution experiments typically provide weathering rates that are
Nicholas Iff, Phil Renforth, Philip A. E. Pogge von Strandmann   +2 more
doaj   +1 more source

Geochemical characteristics of coal-measure source rocks and coal-derived gas in Junggar Basin, NW China

Petroleum Exploration and Development, 2009
Carboniferous and Jurassic coal-measure rocks with their relative coal-formed gas are developed in Junggar Basin. Carboniferous source rocks have high organic material abundance, Type III organic material, and high maturity.
Li Jian, Jiang Zhenglong, Luo Xia, Wang Dongliang, Han Zhongxi   +4 more
doaj   +1 more source

A Rapid Synchronous Determination Method for Soil Inorganic Carbon Content and its Carbon Isotope Ratio

Journal of Isotopes
The accumulation and leaching of soil inorganic carbon (SIC) play crucial roles in the global carbon balance and represent a key research focus in carbon cycling studies. Accurate quantification of SIC content and its stable isotope ratio is critical for
Zhen HE, Hongzhao YUAN, Liping ZHANG, Meimei GENG, Liwei XU, Chunyong LI, Can PENG, Wen CHEN, Siyu TANG, Huan ZHONG, Jiurong WANG   +10 more
doaj   +1 more source

Dry season limnological conditions and basin geology exhibit complex relationships with δ13C and δ15N of carbon sources in four Neotropical floodplains. [PDF]

PLoS ONE, 2017
Studies in freshwater ecosystems are seeking to improve understanding of carbon flow in food webs and stable isotopes have been influential in this work.
Gustavo H Zaia Alves, David J Hoeinghaus, Gislaine I Manetta, Evanilde Benedito   +3 more
doaj   +1 more source

Isotopic Composition of Carbon in Vinegars

Journal of AOAC INTERNATIONAL, 1985
Abstract Measurements of δ13C and 14C-activity were performed on vinegars from various known sources. Natural vinegar can be distinguished from petrochemical acetic acid by 14C-analysis: Natural vinegar currently gives values of > 112% of modern activity; petrochemical acetic acid yields values of 0% of modern activity.
D A, Krueger, H W, Krueger
openaire   +2 more sources

A STUDY ON CARBON ISOTOPE OF CO₂ AND CH₄ IN WESTERN DIENG PLATEU BY GAS CHROMATOGRAPHY- ISOTOPE RATIO MASS SPECTROMETER (GC-IRMS)

Indonesian Journal of Chemistry, 2010
The carbon isotope can be used to evaluate volcanism phenomenon of volcano. The study of carbon isotope of CO2 and CH4 was carried out in western Dieng Plateau by mass-spectrometer.
Hanik Humaida
doaj   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Sudden anaerobization in Amphibacillus xylanus increases intracellular labile ferrous iron and inhibits cell growth

FEBS Open Bio, EarlyView.
Abruptly changing from aerobic to anaerobic conditions (sudden anaerobization) induced growth inhibition and a significant increase in intracellular labile ferrous iron in the aerotolerant anaerobe Amphibacillus xylanus. We found that free flavins mediate efficient electron transfer from NADH to ferric iron under anaerobic conditions, suggesting that ...
Shinya Kimata, Yoichi Sakai, Keisuke Tanaka, Etsuro Yoshimura, Ken Kitano, Morio Ishikawa, Tadahiro Nakamoto, Tsutomu Takayama, Hirofumi Inoue, Kaho Nomura, Tomonori Suzuki, Masataka Uchino, Akira Abe, Youichi Niimura   +13 more
wiley   +1 more source

Carbon cycle history through the Middle Jurassic (Aalenian – Bathonian) of the Mecsek Mountains, Southern Hungary

Geologica Carpathica, 2018
A carbonate carbon isotope curve from the Aalenian–Bathonian interval is presented from the Óbánya valley, of the Mecsek Mountains, Hungary. This interval is certainly less well constrained and studied than other Jurassic time slices.
Price Gregory D., Főzy István, Galácz András   +2 more
doaj   +1 more source