Flavor Precursors
Mostrando 1-12 de 12 artigos, teses e dissertações.
-
1. Volatile compounds in meat and meat products
Abstract Meaty flavor is composed of a few hundreds of volatile compounds, only minor part of which are responsible for the characteristic odor. It is developed as a result of multi-directional reactions proceeding between non-volatile precursors contained in raw meat under the influence of temperature. The volatile compounds are generated upon: Maillard rea
Food Sci. Technol. Publicado em: 09/02/2017
-
2. Characterization of polyphenol oxidase in two cocoa (Theobroma cacao L.) cultivars produced in the south of Bahia, Brazil
Abstract The reactions leading to the formation of precursors of chocolate flavor are performed by endogenous enzymes present in the cocoa seed. Polyphenol oxidase (PPO) presence and activity during fermentation of cocoa beans is responsible for the development of flavor precursors and is also implicated in the reduction of bitterness and astringency. Howeve
Food Sci. Technol. Publicado em: 19/01/2016
-
3. Arginine specific aminopeptidase from Lactobacillus brevis
The proteolytic system of lactic acid bacteria contribute to the development of flavor during the ripening of cheese through the generation of short peptides and free amino acids, which directly or indirectly act as flavor precursors. Newly isolated lactic acid bacteria (LAB) as well as those procured from culture collection centers were screened for the pro
Brazilian Archives of Biology and Technology. Publicado em: 2010-12
-
4. Perfil protéico de sementes de acessos de cacaueiro no desenvolvimento do sabor de chocolate / Proteic profile from different accessions of cocoa seeds on the chocolate flavor development
Typical chocolate flavor is unique, only obtained from fermented, dried and roasted cocoa seeds, and can not be synthesized artificially. The flavor development is influenced by the genetic constitution, post-harvest processing and manufactures. Cotyledons proteins are believed to be the precursors of the chocolate flavor. The aim of the present work was to
Publicado em: 2010
-
5. Estudo comparativo das transformações estruturais e fisico-quimicas durante o processo fermentativo de amendoas de cacau (Theobroma cacao L.) e cupuaçu (Theobroma grandiflorum Schum)
Cupuassu (Theobroma grandiflorum SChum), specimen of the same botanical genus that cocoa, is one of the most important fruits of the Amazon area. The commercialization of its pulp, with very appreciated exotic flavor and in full expansion in Brazil, it begins to wake up interest in the external market. The growing industrialization of the pulp has made avali
Publicado em: 2001
-
6. Estudo do melhoramento do sabor de cacau (Theobroma cacao L.) atraves de ação enzimatica durante a fermentação
The fermentation of cocoa beans is an indispensable activity for the development of the precursors of chocolate flavor. During this stage the pulp that surrounds the beans is metabolized by microrganisms, producing, mainly, ethanol and acetic acid which are absorbed by the cotyledons resulting in the death of the seed, with several physical-chemical changes
Publicado em: 2001
-
7. An aminotransferase from Lactococcus lactis initiates conversion of amino acids to cheese flavor compounds.
The enzymatic degradation of amino acids in cheese is believed to generate aroma compounds and therefore to be involved in the complex process of cheese flavor development. In lactococci, transamination is the first step in the degradation of aromatic and branched-chain amino acids which are precursors of aroma compounds. Here, the major aromatic amino acid
-
8. Purification, Characterization, and Substrate Specificity of a Novel Highly Glucose-Tolerant β-Glucosidase from Aspergillus oryzae
Aspergillus oryzae was found to secrete two distinct β-glucosidases when it was grown in liquid culture on various substrates. The major form had a molecular mass of 130 kDa and was highly inhibited by glucose. The minor form, which was induced most effectively on quercetin (3,3′,4′,5,7-pentahydroxyflavone)-rich medium, represented no more than 18% of t
American Society for Microbiology.
-
9. Functional Characterization of Enzymes Forming Volatile Esters from Strawberry and Banana[w]
Volatile esters are flavor components of the majority of fruits. The last step in their biosynthesis is catalyzed by alcohol acyltransferases (AATs), which link alcohols to acyl moieties. Full-length cDNAs putatively encoding AATs were isolated from fruit of wild strawberry (Fragaria vesca) and banana (Musa sapientum) and compared to the previously isolated
American Society of Plant Biologists.
-
10. Use of 13C Nuclear Magnetic Resonance and Gas Chromatography To Examine Methionine Catabolism by Lactococci
Formation of methanethiol from methionine is widely believed to play a significant role in development of cheddar cheese flavor. However, the catabolism of methionine by cheese-related microorganisms has not been well characterized. Two independent methionine catabolic pathways are believed to be present in lactococci, one initiated by a lyase and the other
American Society for Microbiology.
-
11. Circadian Regulation of the PhCCD1 Carotenoid Cleavage Dioxygenase Controls Emission of β-Ionone, a Fragrance Volatile of Petunia Flowers1
Carotenoids are thought to be the precursors of terpenoid volatile compounds that contribute to flavor and aroma. One such volatile, β-ionone, is important to fragrance in many flowers, including petunia (Petunia hybrida). However, little is known about the factors regulating its synthesis in vivo. The petunia genome contains a gene encoding a 9,10(9′,10�
American Society of Plant Biologists.
-
12. Characterization and Role of the Branched-Chain Aminotransferase (BcaT) Isolated from Lactococcus lactis subsp. cremoris NCDO 763
In Lactococcus lactis, which is widely used as a starter in the cheese industry, the first step of aromatic and branched-chain amino acid degradation is a transamination which is catalyzed by two major aminotransferases. We have previously purified and characterized biochemically and genetically the aromatic aminotransferase, AraT. In the present study, we p
American Society for Microbiology.