Zobrazeno 1 - 10
of 468
pro vyhledávání: '"ANGELO C. PINTO"'
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 88, Iss 1, Pp 237-248 (2016)
ABSTRACT Geissospermum vellosii (Pao pereira) is a Brazilian tree whose stem barks are rich in indole alkaloids that present intense anticholinesterase activity. The present study evaluated the effects of a stem bark fraction (PPAC fraction) and etha
Externí odkaz:
https://doaj.org/article/deb6fb21bc2c46898d9261a9053de9b4
RESSONÂNCIA MAGNÉTICA NUCLEAR DE SUBSTÂNCIAS ORGANOFLUORADAS: UM DESAFIO NO ENSINO DE ESPECTROSCOPIA
Autor:
Frederico Silva Castelo Branco, Bárbara V. Silva, Gabriel Freitas do Rio, Mábio João Santana, Luiz Henrique Keng Queiroz Júnior, Angelo C. Pinto, Núbia Boechat, Luciano Morais Lião
Publikováno v:
Química Nova, Vol 38, Iss 9, Pp 1237-1246 (2015)
Nuclear magnetic resonance is a technique that is widely used for elucidating and characterizing organic substances. Organofluorine substances have applications in many areas from drugs to liquid crystals, but their NMR spectra are often challenging
Externí odkaz:
https://doaj.org/article/16bf8215784146e0a836a754772da4bd
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 87, Iss 3, Pp 1525-1529 (2015)
This paper describes the preparation of a series of 16 anthranilic acids in yields ranging from 51 to 97%, by treating the isatins with NaOH and H2O2. Independently of the nature of the substituent on the aromatic ring, the reactions were complete in
Externí odkaz:
https://doaj.org/article/d70b15883ecb45bfaac48a1a47bbb862
Autor:
Angelo C. Pinto, Eliezer J. Barreiro
Publikováno v:
Química Nova, Vol 36, Iss 10, Pp 1557-1560 (2013)
The paper traces a panorama of the development of new drugs and hopes to contribute for Brazil to become a player in the discovery of new drugs. Brazil is the sixth world market retail consumer of medicines prone to expansion, has a pharmaceutical in
Externí odkaz:
https://doaj.org/article/29f414d91ced40a9aeabedb6253b8ac6
Autor:
Núbia Boechat, Luiz C. S. Pinheiro, Thiago S. Silva, Anna C. C. Aguiar, Alcione S. Carvalho, Monica M. Bastos, Carolina C. P. Costa, Sergio Pinheiro, Angelo C. Pinto, Jorge S. Mendonça, Karen D. B. Dutra, Alessandra L. Valverde, Osvaldo A. Santos-Filho, Isabela P. Ceravolo, Antoniana U. Krettli
Publikováno v:
Molecules, Vol 17, Iss 7, Pp 8285-8302 (2012)
According to the World Health Organization, half of the World’s population, approximately 3.3 billion people, is at risk for developing malaria. Nearly 700,000 deaths each year are associated with the disease. Control of the disease in humans still
Externí odkaz:
https://doaj.org/article/3a72c6a03e3b4834b73c1620194ea621
Autor:
Rita de Cássia Saraiva Nunomura, Angelo C. Pinto, Sergio Massayoshi Nunomura, Adrian Martin Pohlit, Ana Cláudia Fernandes Amaral
Publikováno v:
Química Nova, Vol 35, Iss 11, Pp 2153-2158 (2012)
Simaba guianensis subesp. ecaudata (Simaroubaceae) is a tree found in the Brazilian Amazon. This work describes for the first time the fractionation of stems of this species that resulted in the isolation of the cytotoxic triterpene piscidinol A, the
Externí odkaz:
https://doaj.org/article/3cb375d39c5d4595b22a65c754806ed0
Publikováno v:
Química Nova, Vol 35, Iss 11, Pp 2317-2322 (2012)
Prof. Ernest Wenkert's connections with Brazil on this side of the Atlantic Ocean involved two important links: Profs. Jayr de Paiva Campello and Otto R. Gottlieb. The former, along with Prof. Giuseppe Cilento, was one of those responsible for settin
Externí odkaz:
https://doaj.org/article/0e13fe49997246628a7bbd0f9e0328ec
Publikováno v:
Química Nova, Vol 35, Iss 10, Pp 2092-2097 (2012)
The main objective of this paper is to start and stimulate reflection, discussion and proposing actions that allow Chemistry in Brazil contribute to a prosperous, safer and better future for the nation.
Externí odkaz:
https://doaj.org/article/4e8d29b3605340a9848375dfd606ce75
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 83, Iss 4, Pp 1159-1164 (2011)
2-acetyl physcion (2-acetyl-1,8-dihydroxy-6-methoxy-3-methyl-9,10-anthraquinone, 2), a rare anthraquinone, was isolated from Senna macranthera var. nervosa (Vogel) H.S. Irwin & Barneby (Fabaceae). The chemical structure was elucidated and all ¹H and
Externí odkaz:
https://doaj.org/article/1fc2270eacc247358c52cbfe03e53704
Autor:
Eurídes Francisco Teixeira, Ana Paula Bernardo dos Santos, Renato Saldanha Bastos, Angelo C. Pinto, Arthur Eugen Kümmerle, Roberto Rodrigues Coelho
Publikováno v:
Química Nova, Vol 33, Iss 7, Pp 1603-1606 (2010)
The use of microwave in chemistry has known benefits over conventional heating methods, e.g. reduced reaction times, chemical yield improvement and the possibility if reducing or eliminating the use of organic solvents. We describe herein a procedure
Externí odkaz:
https://doaj.org/article/302afaa26a8d46c4bb50fd1a5d4801b4