Results 31 to 40 of about 18,323 (221)

CONSTITUINTES QUÍMICOS DE Protium paniculatum (BURSERACEAE) [PDF]

Acta Amazonica, 1993
Dos extratos etéreo e etanólico da casca da madeira de Protium paniculatum Engl. foram isolados á e β-AMIRINA (0,012%), β-sitosiero! e estigmasterol (0,003%) e o ácido 3,3'-di-0-metilelágico (0,093%0).
Maria das G. B. ZOGHBI, Jane B. G. SIQUEIRA, Esther L. A. WOLTER, Orlando L. P. Júnior   +3 more
doaj   +1 more source

ESSENTIAL OIL OF Protium unifoliolatum (BURSERACEAE) [PDF]

Acta Amazonica, 1993
The major constituents of the leaf essential oil of P. unifoliolatumare trans-caryophyllene (37.45%), limonene (24.23%) and α-humulene (9.94%).
Maria das G. B. ZOGHBI, Emidio V. L. da CUNHA, Wilson WOLTER FILHO   +2 more
doaj   +1 more source

The contribution of multiple barriers to reproduction between edaphically divergent lineages in the Amazonian tree Protium subserratum (Burseraceae)

Ecology and Evolution, 2020
Disentangling the strength and importance of barriers to reproduction that arise between diverging lineages is central to our understanding of species origin and maintenance. To date, the vast majority of studies investigating the importance of different
T. Misiewicz, Tracey S Simmons, P. Fine
semanticscholar   +1 more source

Review of Water Hydrogen Isotope Separation Technology

He huaxue yu fangshe huaxue
Hydrogen isotopes, such as protium(H), deuterium(D), and tritium(T), are widely used in medical treatment, nuclear energy, national defense, and other fields.
SHI Zhang-hong, ZHAO Qing-kai, CHEN Chang-an   +2 more
doaj   +1 more source

Thermodynamics Isotope Effects of LaNi4.25Al0.75 Absorbing Protium,Deuterium and Tritium

Journal of Isotopes, 2016
The P-C-T curves of LaNi4.25Al0.75 alloy absorbing protium, deuterium and tritium were investigated at constant temperature and volume in our metal hydride research system.
LIANG Bin-bin1;ZHAO Wei-wei1;HE Chang-shui1;QUE Ji2;YANG Hong-guang1
doaj   +1 more source

A high-pressure hydrogen time projection chamber for the MuCap experiment

, 2014
The MuCap experiment at the Paul Scherrer Institute performed a high-precision measurement of the rate of the basic electroweak process of nuclear muon capture by the proton, $\mu^- + p \rightarrow n + \nu_\mu$. The experimental approach was based on the
Andreev, V. A., Banks, T. I., Clayton, S. M., Egger, J., Fahrni, D., Ganzha, V. A., Gray, F. E., Hildebrandt, M., Hofer, A., Kammel, P., Kiburg, B., Kravtsov, P. A., Krivshich, A. G., Lauss, B., Maev, E. M., Maev, O. E., Meier, L., Petitjean, C., Petrov, G., Semenchuk, G. G., Vasilyev, A. A., Vorobyov, A. A., Vznuzdaev, M. E., Winter, P.   +23 more
core   +1 more source

Separação semipreparativa de α e β-amirina por cromatografia líquida de alta eficiência

Química Nova, 2011
The resin obtained from species of the genus Protium (Burseraceae) is formed mostly of pentacyclic triterpenes: α-amyrin and β-amyrin. The separation and purification of these triterpenes were optimized in three steps.
Marluce Oliveira Dias, Lidilhone Hamerski, Angelo C. Pinto   +2 more
doaj   +1 more source

Estrutura e síndromes de dispersão de espécies arbóreas em um trecho de mata ciliar, Sirinhaém, Pernambuco, Brasil Structure and dispersal syndromes of tree species in a stretch of riparian vegetation, Sirinhaém, Pernambuco State, Brazil

Pesquisa Florestal Brasileira, 2012
<p>Este trabalho teve por objetivo conhecer a fitossociologia do componente arboreo em uma mata ciliar de um corrego que desagua no Rio Sirinhaem, localizado no Engenho Buranhem, Sirinhaem, PE e identificar as sindromes de dispersao das especies. O
Roseane Karla Soares da Silva, Ana Lícia Patriota Feliciano, Luiz Carlos Marangon, Rosival Barros de Andrade Lima, Wedson Batista dos Santos   +4 more
doaj   +1 more source

Temperature dependence of dynamic, tunnelling and kinetic isotope effects in formate dehydrogenase [PDF]

, 2018
The origin of the catalytic power of enzymes has been a question of debate for a long time. In this regard, the possible contribution of protein dynamics in enzymatic catalysis has become one of the most controversial topics.
Castillo, Raquel, Moliner, Vicent, Oliva, Mónica, Roca, Maite, Ruiz-Pernía, José Javier   +4 more
core   +2 more sources

Muon Capture on the Proton and Deuteron

, 2008
By measuring the lifetime of the negative muon in pure protium (hydrogen-1), the MuCap experiment determines the rate of muon capture on the proton, from which the proton's pseudoscalar coupling g_p may be inferred.
A.A. Quaranta, D.D. Bakalov, D.H. Wright, F. Gray, G. Bardin, G. Bardin, H.A. Synal, M. Butler, M.J. Barnes, R. Schiavilla, S. Ando, T. Gorringe, V. Bernard, V.A. Ganzha, V.M. Bystritsky   +14 more
core   +1 more source