排序方式: 共有45条查询结果,搜索用时 218 毫秒
11.
Soares Camila Rocha Júnior Vicente Ribeiro Monção Flávio Pinto Borges Lucas Daniel Alcântara Caldeira Luciana Albuquerque Costa Natanael Mendes Ruas José Reinaldo Mendes Rigueira João Paulo Sampaio da Cunha Siqueira Carvalho Cinara de Sales Eleuza Clarete Junqueira de Assis Pires Daniel Ananias Chamone Julieta Maria Alencar 《Tropical animal health and production》2020,52(5):2567-2576
Tropical Animal Health and Production - The qualities of food, mainly of animal origin, have always been of concern to consumers. It is known that the composition of animals’ diets can... 相似文献
12.
Serratosa MP Lopez-Toledano A Millan C Medina M Merida J 《Journal of agricultural and food chemistry》2010,58(22):11907-11912
The production pattern for ochratoxin A in grapes inoculated with Aspergillus carbonarius and changes in its concentration during raisining of Merlot, Syrah, Tempranillo, and Cabernet Sauvignon red grapes and Pedro Ximenez white grape were studied. Grapes were chamber-dried under controlled temperature and humidity conditions, with and without dipping pretreatments in alkaline emulsions of olive oil or ethyl oleate. Based on the results for the grapes that developed the fungus (Merlot and Pedro Ximenez), a temperature of 50 °C in the absence of dipping stopped ochratoxin A production and even degraded part of the toxin already formed. Both dipping pretreatments facilitated removal of the toxin and led to its virtually complete disappearance. However, dipping in the ethyl oleate emulsion caused substantial changes in the sensory characters of the musts obtained from the raisins, so it should be avoided to ensure the expected quality in the sweet wines elaborated from them. 相似文献
13.
Yeast-induced inhibition of (+)-catechin and (-)-epicatechin degradation in model solutions 总被引:3,自引:0,他引:3
Lopez-Toledano A Mayen M Merida J Medina M 《Journal of agricultural and food chemistry》2002,50(6):1631-1635
(+)-catechin and (-)-epicatechin degradation in water-alcohol solutions containing Fe2+ and tartaric acid was studied in the presence and absence of yeasts. On the basis of the results, yeast partially inhibited the degradation of both flavans, with much slower formation of browning products absorbing at 420 and 520 nm. In comparative terms, yeast was found to be more efficient toward the degradation products of (+)-catechin absorbing at the latter wavelength. Likewise, the presence of yeast decreased the yield of a group of colored compounds eluting at high retention times in HPLC and indicated these as important contributors to color darkening in white wines. This inhibitory effect may in part account for the resistance to browning observed over periods of several years in sherry wines subjected to biological aging under flor yeast. 相似文献
14.
Monção Flávio Pinto Costa Marco Aurélio Morais Soares Rigueira João Paulo Sampaio de Sales Eleuza Clarete Junqueira Leal Dijair Barbosa da Silva Marcos Felipe Pereira Gomes Virgílio Mesquita Chamone Julieta Maria Alencar Alves Dorismar David da Cunha Siqueira Carvalho Cinara Murta José Eduardo Jardim Júnior Vicente Ribeiro Rocha 《Tropical animal health and production》2020,52(1):235-241
Tropical Animal Health and Production - The objective of this study was to evaluate the productivity, productive efficiency, and nutritional value of the elephant grass cultivar BRS capiaçu... 相似文献
15.
Julieta Massaferro Sergio Ribeiro Guevara Andrea Rizzo María Arribre 《水产资源保护:海洋与淡水生态系统》2005,15(1):23-30
- 1. A short sediment core from Lake Morenito was studied to assess the impact of environmental changes on chironomid communities occurring during the last ca 100 yr.
- 2. Lake Morenito (41°S, 71°W) is located 20 km west of the city of Bariloche, in northern Patagonia, Argentina. Before 1960, this lake was a branch of Lake Moreno; by that time, an artificial dam closed the system, establishing the new lake. Another human disturbance that took place during the time span of the core was the introduction of salmonids to the area ca 1910.
- 3. The most important natural events that occurred in the area during the last 100 yr were related to volcanic episodes. One of them, occured in Chile in 1960 affecting the Argentinian side, coincided with the dam's construction.
- 4. Changes in the chironomid community were recorded by studying the sub‐fossil remains (the chitinized head capsule of the larvae) present in the sedimentary sequence. The results show that volcanic tephra layers deposited along the core led to a sharp instantaneous drop in the diversity and abundance of chironomid assemblages. Human activities are also associated with a change in chironomid community composition.
- 5. Chironomus reached its maximum abundance values in 1910 and 1960. The organic matter content also increased at the same time. The increase of Chironomus after 1910 is clearly related to an increase in the trophic status of the lake. However, owing to the synchronicity of events in 1960, i.e. the volcanic event and the dam's construction, it is difficult to establish whether the change in the chironomid assemblage was in response to an increase in trophic enrichment, to natural disturbance, or both.
16.
Piccinelli AL Salazar De Ariza J Miranda RV Mora SQ Aquino R Rastrelli L 《Journal of agricultural and food chemistry》2005,53(2):289-294
Three new furostanol oligoglycosides, 3-O-{alpha-L-rhamnopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl-(1-->4)]-beta-D-glucopyranosyl}-26-O-beta-D-glucopyranosyl-22alpha-methoxy-25R-furost-5-ene-3beta,17alpha,26-triol (1), 3-O-{alpha-L-rhamnopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl-(1-->4)]-beta-D-glucopyranosyl}-26-O-beta-D-glucopyranosylfurost-5-ene-3beta,17alpha,22alpha,25,26-pentol (2), and 3-O-{alpha-L-rhamnopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl-(1-->4)]-beta-D-glucopyranosyl}-26-O-beta-D-glucopyranosylfurost-5-ene-3beta,22alpha,25,26-tetrol (3), named lycianthosides A-C, together with known flavone glycosides were isolated from Lycianthes synanthera leaves, an edible plant of the Solanaceae family that grows naturally in Guatemala. The nutrient composition of the raw leaves was also evaluated. 相似文献
17.
Martínez Pastur Guillermo José Cellini Juan M. Chaves Jimena E. Rodríguez-Souilla Julián Benitez Julieta Rosas Yamina M. Soler Rosina M. Lencinas María V. Peri Pablo L. 《Agroforestry Systems》2022,96(7):1039-1052
Agroforestry Systems - Sustainable forest management is proposed as a solution for many ecological and socio-economic trade-offs associated with different forest uses. In Patagonia, silvopastoral... 相似文献
18.
Natalia Norero Julieta Malleville Marcelo Huarte Sergio Feingold 《Potato Research》2002,45(2-4):131-138
Potato cultivar identification is of great importance for seed production, germplasm management and breeders’ right protection.
This study identified four SSRs necessary to discriminate between 37 commercially important potato (Solarium tuberosum L.) cultivars from INTA and other origins, frequently used in Argentina and neighbouring countries. Their PIC values ranged
from 0.63 to 0.73 and separation was performed using high resolution agarose gel electrophoresis. The clear patterns obtained
and the low cost and simplicity of the technique makes it an ideal tool for routine and effective potato cultivar identification. 相似文献
19.
Elías J. Mongiardini Julieta Prez-Gimnez M. Julia Althabegoiti Julieta Covelli J. Ignacio Quelas Silvina L. Lpez-García Aníbal R. Lodeiro 《Soil biology & biochemistry》2009,41(9):2017-2020
Competition for nodulation is a complex problem where bacterial adhesins, which are required for root colonization, may play a role. However, the possible influence of adhesins on competitiveness was scarcely studied. In this work, the Rhizobium leguminosarum bv trifolii adhesion protein RapA1 was overproduced from a pHC60-derived plasmid and expressed in R200 strain. When an overproducing strain and a control-carrying empty vector were co-inoculated on clover plants, a positive effect of RapA1 on competition for nodule occupation was observed. Therefore, optimization of RapA1 expression may be considered for improvement of rhizobial competitiveness. 相似文献
20.
Rosa Palmeri Cristina Restuccia Julieta Ines Monteleone Elisa Sperlinga Laura Siracusa Mauro Serafini Alberto Finamore Giovanni Spagna 《Plant foods for human nutrition (Dordrecht, Netherlands)》2017,72(2):211-218
Olive leaves represent a quantitatively significant by-product of agroindustry. They are rich in phenols, mainly oleuropein, which can be hydrolyzed into several bioactive compounds, including hydroxytyrosol. In this study, water extract from olive leaves ‘Biancolilla’ was analyzed for polyphenol profile, DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activity and protective effect on differentiated Caco-2 cells. The efficacy of two enzymatic treatments in promoting the release of bioactive phenols was investigated: a) enzymatic extract from Wickerhamomyces anomalus, characterized by β-glucosidase and esterase activities; b) commercial β-glucosidase. Composition and bioactivity of the resulting extracts were compared. The results showed that the yeast-treated extract presented hydroxytyrosol content and DPPH radical scavenging activity comparable to those obtained using commercial β-glucosidase; however, it was showed the additional presence of hydroxycinnamic acids. In experiments on Caco-2 cells, the leaf extracts promoted the recovery of cell membrane barrier at different minimum effective concentrations. The high specificity of W. anomalus enzymatic extract may represent an effective tool for the release of bioactive phenols from olive by-products. 相似文献