Zobrazeno 1 - 10
of 10
pro vyhledávání: '"José O. Guerra"'
Autor:
Yhosvanni Pérez Rodríguez, Roberto Valdés Herrera, José O. Guerra de León, Michael Madruga Suarez, Leónides Castellanos González
Publikováno v:
Centro Agrícola, Vol 47, Iss 2, Pp 75-83 (2020)
There are several products that have been used for the control of Sitophilus oryzae L. However, the high resistance of the insect to various chemical products has motivated the search for new alternatives for its control, which led to evaluating the
Externí odkaz:
https://doaj.org/article/cd4a1424ff6e474eb03335545aed7dae
Autor:
GONZÁLEZ-MADARIAGA, Yisel, SANTIESTFBAN-MUÑOZ, Dayli, NIETO-REYES, Leisy, GARCÍA-GÓMEZ, María L., DE LEÓN, José O. GUERRA
Publikováno v:
Journal of Research in Pharmacy; 2024, Vol. 28 Issue 6, p1963-1973, 11p
Publikováno v:
J. Nat. Prod. 2016, 79, 2903−2911
Four new steroidal saponins (1-4) along with 13 known saponins were isolated from the leaves of Furcraea hexapetala. The new compounds were identified as (20R,22R,25R)-3β-hydroxy-5α-spirostan-12-one 3-O-{α-l-rhamnopyranosyl-(1→4)-O-β-d-glucopyr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::247c92e81d00a4d9b54369a4462465c0
http://hdl.handle.net/10498/20349
http://hdl.handle.net/10498/20349
Publikováno v:
Magnetic Resonance in Chemistry. 45:615-620
A careful NMR analysis, especially 1D TOCSY and 1D ROESY, of two refined saponin fractions allowed us to determine the structures of four new saponins from a polar extract of the Agave brittoniana Trel. spp. Brachypus leaves. A full assignment of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92c6ede270076b42fffba518c880f354
https://doi.org/10.1002/mrc.2012
https://doi.org/10.1002/mrc.2012
Autor:
Ana M. Simonet, Anna Stochmal, Juan M. Calle, Francisco A. Macías, Łukasz Pecio, Andy J. Pérez, José O. Guerra
Publikováno v:
Phytochemistry 105 (2014) 92–100
RODIN. Repositorio de Objetos de Docencia e Investigación de la Universidad de Cádiz
instname
RODIN. Repositorio de Objetos de Docencia e Investigación de la Universidad de Cádiz
instname
A bioassay-guided fractionation of Agave offoyana leaves led to the isolation of five steroidal saponins ( 1 – 5 ) along with six known saponins ( 6 – 11 ). The compounds were identified as (25 R )-spirost-5-en-2 α ,3 β -diol-12-one 3- O -{ α
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f026e1a0d7a2642f4ce6ec89b95007b9
https://pubmed.ncbi.nlm.nih.gov/24939800
https://pubmed.ncbi.nlm.nih.gov/24939800
Autor:
Clara Nogueiras, Iraida Spengler, José O Guerra, Yarelys Ortiz, Susana Torres, Trina H García, Carlos R Romeu, Erik L Regalado, Telce A González, Wilmer H Perera, Rodney Lacret
Publikováno v:
Biotecnología Aplicada, Vol 27, Iss 4, Pp 314-318
Interest in natural products as a source for innovation in drug discovery and agrochemicals is still growing worldwide. Natural products, whose immense diversity has been appreciated for many years, may become in a rich source of novel chemical struc
Externí odkaz:
https://doaj.org/article/a73eb34f0fa541fb8fea05ed1b0aeedf
Autor:
José O. Guerra, Francisco A. Macías, Juan M. Calle, Andy J. Pérez, Ana M. Simonet, Anna Stochmal
Publikováno v:
Phytochemistry 95 (2013) 298–307
RODIN. Repositorio de Objetos de Docencia e Investigación de la Universidad de Cádiz
instname
RODIN. Repositorio de Objetos de Docencia e Investigación de la Universidad de Cádiz
instname
Bioguided studies of flowers of Agave offoyana allowed the isolation of five steroidal saponins never described previously, Magueyosides A–E (1–5), along with six known steroidal saponins (6–11). The structures of compounds were determined as (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6625eb7ae7e7913dfe8e087dc8d195e0
http://hdl.handle.net/10498/20275
http://hdl.handle.net/10498/20275
Publikováno v:
Magnetic resonance in chemistry : MRC. 48(5)
A careful NMR analysis, especially by 1D TOCSY and 1D ROESY, of a refined saponin fraction allowed us to determine the structure of three saponins from a polar extract of Agave brittoniana Trel. spp. Brachypus leaves. The use of 1D DOSY for the suppr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4255ffe9c4edafeb5a3d688fd04ec053
https://pubmed.ncbi.nlm.nih.gov/20391439
https://pubmed.ncbi.nlm.nih.gov/20391439
Autor:
Francisco A. Macías, Alfredo Meneses, Clara Nogueiras, José O. Guerra, José Antonio Escario, Alicia León Gómez, Ana M. Simonet
Publikováno v:
Revista de Biología Tropical; Vol. 56 No. 4 (2008): Volume 56 – Regular number 4 – December 2008
Revista de Biología Tropical; Vol. 56 Núm. 4 (2008): Volumen 56 – Número regular 4 – Diciembre 2008
Revista Biología Tropical; Vol. 56 N.º 4 (2008): Volumen 56 – Número regular 4 – Diciembre 2008
Portal de Revistas UCR
Universidad de Costa Rica
instacron:UCR
Revista de Biología Tropical, Vol 56, Iss 4, Pp 1645-1652 (2008)
Revista de Biología Tropical, Volume: 56, Issue: 4, Pages: 1645-1652, Published: DEC 2008
Revista de Biología Tropical; Vol. 56 Núm. 4 (2008): Volumen 56 – Número regular 4 – Diciembre 2008
Revista Biología Tropical; Vol. 56 N.º 4 (2008): Volumen 56 – Número regular 4 – Diciembre 2008
Portal de Revistas UCR
Universidad de Costa Rica
instacron:UCR
Revista de Biología Tropical, Vol 56, Iss 4, Pp 1645-1652 (2008)
Revista de Biología Tropical, Volume: 56, Issue: 4, Pages: 1645-1652, Published: DEC 2008
El género Agave, familia Agavaceae, tiene más de 300 especies, con aproximadamente 16 distribuidas en toda Cuba. Una de ellas, el Agave brittoniana Trel. (ssp. brachypus), es una subespecie endémica y sus hojas son tradicionalmente utilizadas en e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4ede634633ce545f953bce50df41acd
https://revistas.ucr.ac.cr/index.php/rbt/article/view/5751
https://revistas.ucr.ac.cr/index.php/rbt/article/view/5751
Autor:
Clara Nogueiras, Iraida Spengler, José O Guerra, Yarelys Ortiz, Susana Torres, Trina H García, Carlos R Romeu, Erik L Regalado, Telce A González, Wilmer H Perera, Rodney Lacret
Publikováno v:
Biotecnología Aplicada, Vol 27, Iss 4, Pp 314-318
Interest in natural products as a source for innovation in drug discovery and agrochemicals is still growing worldwide. Natural products, whose immense diversity has been appreciated for many years, may become in a rich source of novel chemical struc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doajarticles::0094678c003851d52ccc67729edbacd6
http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1027-28522010000400010&lng=en&tlng=en
http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1027-28522010000400010&lng=en&tlng=en