Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Cristóbal Lárez-Velásquez"'
Publikováno v:
Frontiers in Plant Science, Vol 15 (2024)
The agricultural use of synthetic pesticides, fertilizers, and growth regulators may represent a serious public health and environmental problem worldwide. All this has prompted the exploration of alternative chemical compounds, leading to exploring
Externí odkaz:
https://doaj.org/article/2c174394f8584f44b380b9348ad0c059
Autor:
Cristóbal Lárez-Velásquez
Publikováno v:
Polímeros, Vol 33, Iss 1 (2023)
Abstract An overview perspective of the potential of chitin and chitosan biopolymers to promote economically and environmentally sustainable development poles, which could be exploited especially in developing countries, is presented. Their following
Externí odkaz:
https://doaj.org/article/0c083d2479ea4541b243bc59bb95af62
Autor:
Cristóbal Lárez Velásquez
Publikováno v:
OENO One, Vol 57, Iss 1 (2023)
This paper reviews the main applications of the biopolymer chitosan, the main derivative of chitin, a material usually obtained from natural sources accessible at low cost, i.e., industrial wastes from fisheries. Due to its natural origin, which conf
Externí odkaz:
https://doaj.org/article/e3b4023d9c1e4902a3213a03b791417d
Publikováno v:
Avances en Química, Vol 7, Iss 3, Pp 181-186 (2012)
The Soxhlet extraction, using n-hexane as solvent, of the orange seed oil from waste residues obtained in street sales of fruit juices of Merida, Venezuela, was studied. Yields of 5.1% oil (w/w) and 42.7% (w/w) relative to the initial mass of the res
Externí odkaz:
https://doaj.org/article/098d9266085a4926b0fccca9baa8411a
Publikováno v:
Avances en Química, Vol 2, Iss 2, Pp 25-32 (2007)
Enzymatic degradation of chitosan (degree of acetylation (da) and average viscosimetric molecular weight (MV) of 0.85 and 310 kDa, respectively) was carried out using commercial bromelain. Decrease of the average viscosimetric polymerization degree (
Externí odkaz:
https://doaj.org/article/e807f74ac3fb497486e7aaea5bbbe335
Autor:
Cristóbal Lárez Velásquez
Publikováno v:
Avances en Química, Vol 1, Iss 2, Pp 15-21 (2006)
The present work shows, in a clear and simple way, industrial production and common applications oftwo ancient natural polymers on earth but very current due to its application possibilities: chitin andchitosan. Here a simple sample of the wide possi
Externí odkaz:
https://doaj.org/article/c202d4b0f64645bd9f074d3d6d526c3f
Publikováno v:
Avances en Química, Vol 1, Iss 1, Pp 25-29 (2006)
After a brief historical review of the Departamento de Química (DQ-ULA) de la Facultad de Ciencias de la Universidad de Los Andes, Mérida, Venezuela, information about undergraduate thesis production during 2000-2004 period is presented. Similarly,
Externí odkaz:
https://doaj.org/article/95b4b3b313ce498dbf16e313802b8148
Autor:
Cristóbal Lárez Velásquez, María Peña-Vera, Elizabeth Pérez, Maura Rojas, Miguel Sulbarán, Milibeth Peña
Publikováno v:
Journal of Analytical & Pharmaceutical Research. 8:55-60
Three Xanthomonas strains were isolated from natural environments in Venezuela and studied morphologically, subjected to biochemical characterization and microbiologically and molecularly identified. In order to reconfirm the identity of these strain
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b489fcb4dd0a131f917157a79aac5c82
https://doi.org/10.15406/japlr.2019.08.00312
https://doi.org/10.15406/japlr.2019.08.00312
Autor:
Cristóbal Lárez Velásquez
Publikováno v:
Journal of Analytical & Pharmaceutical Research. 7
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e48a0cc2b72b19868a5ffaa2cd77bb46
https://doi.org/10.15406/japlr.2018.07.00271
https://doi.org/10.15406/japlr.2018.07.00271
Fungal plant diseases are one of the major issues faced by the agriculture because of the considerable losses they cause. Due to the indiscriminate use of agrochemicals to control the microorganisms that cause infection and diseases, this issue has b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5e0c1293b1ff079779f53e2879eb10f
https://doi.org/10.1016/b978-0-12-802735-6.00010-0
https://doi.org/10.1016/b978-0-12-802735-6.00010-0
