Results 61 to 70 of about 327,817 (261)

Production and characterization of 60Fe standards for accelerator mass spectrometry.

PLoS ONE, 2019
Accelerator Mass Spectrometry (AMS) is one of the most sensitive analysis techniques to measure long-lived radionuclides, reaching detection limits for isotopic ratios down to 10-15-10-16 in special cases.
Dorothea Schumann, Niko Kivel, Rugard Dressler   +2 more
doaj   +1 more source

Cinética do fósforo em tecidos de suínos em crescimento Phosphorus kinetic in tissue of swine in the growing phase

Revista Brasileira de Zootecnia, 1999
Esta pesquisa foi realizada para estudar a cinética do fósforo (P) em tecidos de suínos em crescimento, alimentados com rações contendo níveis crescentes de P total (0,30; 0,40; 0,51; 0,65; e 0,73%), por meio do uso do 32P como traçador.
João Batista Lopes, Dorinha Miriam Silber S. Vitti, Agustinho Valente de Figueirêdo, Hacy Pinto Barbosa   +3 more
doaj   +1 more source

Cancer‐Associated BCL‐2 Mutants Reveal Mechanisms Towards Venetoclax Resistance

Advanced Science, EarlyView.
Venetoclax (VEN) resistance in chronic lymphocytic leukemia arises from diverse BCL2 mutations. We map mechanisms contributing to VEN resistance across common BCL‐2 variants. G101V and D103Y reduce drug binding and increase sequestration of pro‐apoptotic proteins. V156D blocks VEN allosterically.
Jonas Aufdermauer, Ian de Ridder, Mahjoobeh Ehsani, Marasim Khan, Justin Kale, Lukas P. Frenzel, David Andrews, Spyridoula Karamanou, Ana J. Garcia‐Saez, Geert Bultynck   +9 more
wiley   +1 more source

Comparação e aplicação de dois modelos matemáticos no estudo do metabolismo de fósforo em suínos Comparison and application of two mathematical models in the study of the phosphorus in pig metabolism

Revista Brasileira de Zootecnia, 2010
Avaliaram-se dois modelos matemáticos no estudo do fluxo de fósforo no metabolismo de suínos com os objetivos de destacar o modelo mais eficiente e indicar a fonte de fósforo com maior potencial para uso na nutrição de suínos.
José Aparecido Moreira, Dorinha Miriam Silber Schmidt Vitti, Alexandre de Oliveira Teixeira, João Batista Lopes   +3 more
doaj   +1 more source

Assessing the Labile Arsenic Pool in Contaminated Paddy Soils by Isotopic Dilution Techniques and Simple Extractions

, 2011
Arsenic (As) contamination of paddy soils threatens rice cultivation and the health of populations relying on rice as a staple crop. In the present study, isotopic dilution techniques were used to determine the chemically labile (E value) and ...
Price, Adam H., Price, A. H., Meharg, A. A., Zhao, Fang-Jie, Zhu, Yong-Guan, Steve P. McGrath, Stroud, J. L., Zhao, F-J., Fang-Jie Zhao, Dasgupta, Tapash, Norton, G. J., Islam, M. Rafiqul, Adam H. Price, Tapash Dasgupta, Khan, M. Asaduzzman, Zhu, Y-G., Dasgupta, T., McGrath, S. P., Meharg, Andrew A., Norton, Gareth J., Yong-Guan Zhu, M. Rafiqul Islam, Andrew A. Meharg, McGrath, Steve P., Khan, M. A., Gareth J. Norton, M. Asaduzzman Khan, Meharg, Andrew A.; id_orcid, Stroud, Jacqueline L., Islam, M. R., Jacqueline L. Stroud   +30 more
core   +1 more source

Asymmetric Single‐Atom Catalysts Govern Diffusible and Non‐Diffusible Non‐Radical Pathways for Selective Degradation of Antibiotic Resistance Genes

Advanced Science, EarlyView.
Asymmetric single‐atom metal‐nitrogen‐carbon catalysts modulate the non‐radical pathway during peroxymonosulfate (PMS) activation. A fundamental contrast was revealed between diffusible singlet oxygen (1O2) and non‐diffusible electron‐transfer pathways (ETP) in antibiotic resistance gene (ARG) degradation.
Chen Gao, Jun Sun, Liang Zhang, Litao Lin, Zongfeng Wan, Bingcai Pan, Sheng Tang   +6 more
wiley   +1 more source

GC-MS METHODS FOR AMINO ACIDS DETERMINATION IN DIFFERENT BIOLOGICAL EXTRACTS

Studia Universitatis Babes-Bolyai Chemia, 2016
Sensitive, precise and accurate analytical methods for free amino acids determination in biological samples were developed. Purification by ion exchange technique was followed by two steps derivatization method to obtain trifluoroacetyl ester ...
Monica CULEA, Andreea Maria IORDACHE, Elena HORJ, Cornelia MESAROȘ, Ramona BLEIZIFFER   +4 more
doaj  

Absorção real, perdas endógenas e exigência de fósforo para suínos em final de crescimento, pela técnica da diluição isotópica True absorption and endogenous fecal losses of phosphorus for swine in the final of the growing based on the isotopic dilution techinique

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 1999
Determinaram-se as perdas endógenas mínimas, a exigência de fósforo e a absorção real do fósforo do fosfato bicálcico em suínos no final da fase de crescimento, pela técnica da diluição isotópica. Foram utilizados 20 leitões híbridos comerciais, com peso
J.B. Lopes, D.M.S.S. Vitti, A.V. Figueirêdo, H.P. Barbosa   +3 more
doaj   +1 more source

The Effects of Isotopic Dilution on the Infrared Spectrum of Solid Sodium Formate

, 1979
Infrared spectra (4000-200 cm-1; KBr discs) have been obtained for ten isotopic species of solid sodium formate in bulk (isotopic purities ranging from 80% to 99%) and after isotopic dilution.
JE Rowe, E Spinner
core   +1 more source

A uniform isotopic and chemical signature of dust exported from Patagonia: Rock sources and occurrence in southern environments [PDF]

, 2007
Patagonia is considered to be the most important source of dust from South America that is deposited in surrounding areas, and we present here a systematic Sr and Nd isotopic study of sediment currently being exported.
Probst, Jean-Luc, Gaiero, Diego M., Brunet, Frédéric, Depetris, Pedro J.   +3 more
core   +1 more source