Data/hora: 04/06/2024 21:41:20

Biblioteca(s): 	Embrapa Agroindústria de Alimentos.	
Data corrente: 	28/09/2011	
Data da última atualização: 	30/11/2012	
Autoria: 	NEGRI, G.; TEIXEIRA, E. W.; ALVES, M. L. T. M. F.; MORETI, A. C. de C. C.; OTSUK, I. P.; BORGUINI, R. G.; SALATINO, A.	
Afiliação: 	GIUSEPPINA NEGRI, CEBRID-UNIFESP; ERICA WEINSTEIN TEIXEIRA, AGÊNCIA PAULISTA DE TECNOLOGIA DOS AGRONEGÓCIOS; MARIA LUISA TELES MARQUES FLORÊNCIO ALVES, AGÊNCIA PAULISTA DE TECNOLOGIA DOS AGRONEGÓCIOS; AUGUSTA CAROLINA DE CAMARGO CARMELLO MORETI, AGÊNCIA PAULISTA DE TECNOLOGIA DOS AGRONEGÓCIOS; IVANI POZAR OTSUK, AGÊNCIA PAULISTA DE TECNOLOGIA DOS AGRONEGÓCIOS; RENATA GALHARDO BORGUINI, CTAA; ANTONIO SALATINO, INSTITUTO DE BIOCIÊNCIAS-USP.	
Título: 	Hydroxycinnamic acid amide derivatives, phenolic compounds and antioxidant activities of extracts of pollen samples from southeast Brazil.	
Ano de publicação: 	2011	
Fonte/Imprenta: 	Journal of Agricultural and Food Chemistry, v. 59, n. 10, p. 5516-5522, 2011.	
DOI: 	10.1021/jf200602k	
Idioma: 	Inglês	
Conteúdo: 	Seven bee pollen samples (C1?C7) with different palynological sources were harvested from Pindamonhangaba municipality (Southeast Brazil). Methanol extracts of untreated samples (control), samples frozen at &#8722;18 °C and samples frozen and then dried were analyzed by HPLC/PAD/ESI/MS/MS. Flavonoid diglycosides of quercetin, kaempferol, isorhamnetin and patuletin were detected, together with hydroxycinnamic acid amide derivatives, such as N&#8242;,N&#8242;&#8242;,N&#8242;&#8242;&#8242;-tris-p-feruloylspermidine and N&#8242;,N&#8242;&#8242;,N&#8242;&#8242;&#8242;-tris-p-coumaroylspermidine. Distinct phenolic profiles characterized the analyzed samples, but no differences were noted as resulting from different treatments. Total phenolic contents determined with the Folin?Ciocalteau reagent ranged from 1.7 to 2.2%. Antioxidant activities above 75%, based on the DPPH method, were observed for all extracts, not correlated with total phenolic contents. Among samples from the same origin, those frozen were more active than samples untreated (control), and the samples frozen and then dried were the most active.	
Palavras-Chave: 	Atividade antioxidante.	
Thesagro: 	Apis mellifera; Composição química; Composto fenólico; Flavonóide; Pólen.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Agroindústria de Alimentos (CTAA)	
Exemplares: 	CTAA - (10998-1) - UPC - AP - PP - 2011/044 -  - 2011.00346 - DIS