Category: esters-buliding-blocks

Chen, Kai published the artcilePredominance of indigenous non-Saccharomyces yeasts in the traditional fermentation of greengage wine and their significant contribution to the evolution of terpenes and ethyl esters, Safety of Benzyl acetate, the main research area is Gliocephalotrichum Sordariales Candida Issatchenkia fermentation wine; Greengage; Microbiota; Non-Saccharomyces yeast; Plasmolysis; Spontaneous fermentation; Volatile compounds.

Greengage wine is a popular drink in Southeast Asia. Salt maceration and sugar addition in traditional fermentation caused plasmolysis of greengage skin cell. In this case, the development of indigenous microbiota can use the nutrition of exosmosis of cell tissue fluid. The result of high-throughput sequencing technol. indicated the non-Saccharomyces yeasts dominated the entire process of traditional fermentation Key yeast genera, such as Gliocephalotrichum, Sordariales, Candida and Issatchenkia were identified, a dynamic non-Saccharomyces yeast community was spontaneously formed and highly correlated to the evolution of volatile compounds of greengage wine, such as monoterpenes, C13-norisoprenoids, Et esters and ethylphenols. Yeast glycosidases released nonvolatile aroma precursors into free form, which contributed to the aroma profile with strong flowery and fruity flavor in greengage wine. Moreover, a bacteria genus of Gordonia performed significant correlations to the development of characteristic volatiles at the beginning of primary fermentation

Food Research International published new progress about 18S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Safety of Benzyl acetate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

De Filippis, Francesca published the artcileInfluence of microbial communities on the chemical and sensory features of Falanghina sweet passito wines, Formula: C10H20O2, the main research area is passito wine falanghina sherry fermentation microbiota; Falanghina; Microbiota; Passito sweet wine; Quantitative Descriptive Analysis (QDA); Volatile Organic Compounds (VOCs).

Natural (N) as well as starter inoculated (S, inoculated with Saccharomyces cerevisiae M3-5; CZS, Candida zemplinina T13, Zygosaccharomyces bailii NS113 and Saccharomyces cerevisiae M3-5) fermentations of Falanghina must from dehydrated grape were monitored. Culture dependent analyses and amplicon-based high-throughput sequencing targeting 18S rRNA and 16S rRNA genes were used to monitor the fungal and bacterial communities (8 sampling points during 65 days). The resulting wines were subject to both sensory evaluation and volatile organic compounds anal. Fungal community of un-inoculated musts (N) at beginning of the fermentation was mainly represented by Aureobasidium, Cladosporium, Sclerotinia, while Candida, Debaryomyces, Hanseniaspora, Metschnikowia, Pichia, Saccharomyces and Zygosaccharomyces showed a very low occurrence. The dominance of Hanseniaspora vineae and/or Hanseniaspora uvarum was clear up to 29th days of fermentation S. cerevisiae occurred in all the phases but become dominant only at the end of the process. The odor profiles as evaluate by Quant. Descriptive Anal. (QDA) highlighted a significant impact of the fungal populations on the olfactory profiles of the wines. Raisins, dried fruits, Sherry and liqueur were stronger in both S and CZS, while N was mostly discriminated by solvent/chem. and floral features. Outcomes underpin the impact of microbiota on the chem. and odor traits of Falanghina passito wines.

Food Research International published new progress about 18S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Formula: C10H20O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Braima, Kamil published the artcileZoonotic infection by Cryptosporidium fayeri IVgA10G1T1R1 in a Western Australian human, Name: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, the main research area is nitazoxanide gp60 18S rRNA Crytosporidium zoonotic infection; Cryptosporidium ; C. fayeri IVgA10G1T1R1; Western Australia; gp60 locus; next generation sequencing; zoonoses.

In the present study, a 37-yr-old immunosuppressed female in Western Australia (WA) was identified as pos. for Cryptosporidium by microscopy and treated with nitazoxanide. Mol. analyses at the 18S rRNA (18S) and 60 kDa glycoprotein (gp60) loci identified C. fayeri subtype IVgA10G1T1R1, which had previously been identified in western gray kangaroos (Macropus fuliginosus) in WA. Next generation sequencing (NGS) of the gp60 locus confirmed the absence of mixed infections with other Cryptosporidium species. This is only the second report of C. fayeri in a human host highlighting the zoonotic potential of this wildlife-associated species. Routine diagnosis using mol. methods in laboratories is required to better understand the diversity and epidemiol. of Cryptosporidium parasite.

Zoonoses and Public Health published new progress about 18S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 55981-09-4 belongs to class esters-buliding-blocks, name is 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, and the molecular formula is C12H9N3O5S, Name: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Perpetuini, Giorgia published the artcileContribution of Pichia manshurica strains to aroma profile of organic wines, Quality Control of 106-32-1, the main research area is Pichia organic wine volatile compound flavor aroma.

Abstract: In this study, the volatile compounds produced by 11 Pichia manshurica strains-isolated from spoiled bottled organic wines of Montepulciano d’Abruzzo and filter membranes-were evaluated in must and wine. Moreover, a quick, reliable and inexpensive method to identify this spoilage species was reported. In particular, a species-specific primer pair was developed using 26S rRNA as target gene. Primers were tested on different yeast species and a band of 300 bp was obtained only for P. manshurica strains. More than 70 volatile compounds were identified. The differences were quant. rather than qual. and the majority of the strains released compounds associated with off-flavours and off-odours in must and wine. The obtained data revealed the ability of P. manshurica strains to release compounds which could produce off-flavours and odours.

European Food Research and Technology published new progress about 26S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Quality Control of 106-32-1.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Perpetuini, Giorgia published the artcileContribution of Pichia manshurica strains to aroma profile of organic wines, Recommanded Product: Ethyl nonanoate, the main research area is Pichia organic wine volatile compound flavor aroma.

Abstract: In this study, the volatile compounds produced by 11 Pichia manshurica strains-isolated from spoiled bottled organic wines of Montepulciano d’Abruzzo and filter membranes-were evaluated in must and wine. Moreover, a quick, reliable and inexpensive method to identify this spoilage species was reported. In particular, a species-specific primer pair was developed using 26S rRNA as target gene. Primers were tested on different yeast species and a band of 300 bp was obtained only for P. manshurica strains. More than 70 volatile compounds were identified. The differences were quant. rather than qual. and the majority of the strains released compounds associated with off-flavours and off-odours in must and wine. The obtained data revealed the ability of P. manshurica strains to release compounds which could produce off-flavours and odours.

European Food Research and Technology published new progress about 26S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Recommanded Product: Ethyl nonanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Alfonzo, Antonio published the artcileEffects of different yeast strains, nutrients and glutathione-rich inactivated yeast addition on the aroma characteristics of Catarratto wines, Formula: C6H12O3, the main research area is Saccharomyces wine aroma glutathione; Alcoholic fermentation; Catarratto grape variety; Glutathione; Saccharomyces cerevisiae; Volatile organic compounds (VOC’s); Wine aroma.

Catarratto is one of the most common non-aromatic white grape varieties cultivated in Sicily (Southern Italy). In order to improve the aromatic expression of Catarratto wines a trial was undertaken to investigate the effect of yeast strain, nutrition and reduced glutathione. Variables included two Saccharomyces cerevisiae strains, an oenol. strain (GR1) and one isolated from honey byproducts (SPF52), three different nutrition regimes (Stimula Sauvignon Blanc (SS), Stimula Chardonnay (SC) and classic nutrition practice), and a specific inactivated yeast rich in reduced glutathione to prevent oxidative processes [Glutastar (GIY)] ensuing in ten treatments (T1-T10). Microbiol. and chem. parameters demonstrated the aptitude of strain SPF52 to successfully conduct alc. fermentation During fermentation, the Saccharomyces yeast populations ranged from 7 to 8 logarithmic CFU/mL. All wines had a final ethanol content ranging between 12.91 and 13.85% (volume/volume). The dominance of the two starter strains over native yeast populations was higher than 97% as estimated by interdelta anal. The addition of nutrients SS or SC increased the aromatic complexity of the wines as reflected by volatile organic compounds (VOCs) composition and sensory profiles. In particular, 32 VOCs were identified; alcs. (62.46-81.1%), thiols (0.27-0.87%), ethers (0.09-0.16%), aldehydes (0-1.21%), ketones (0-2.28%), carboxylic acids (4.21-12.32%), esters (0-10.85%), lactones (0.9-1.49%) and other compounds (0.77-6.9%). Sensory anal. demonstrated a significant impact on wine aroma in relation to yeast starter strain used, the type of nutrition (SS, SC or classic nutrition) and the presence/absence of GIY. The wines produced with GR1 yeast strain and SS (T2), SPF52 with SC (T9) both in presence of GIY showed higher overall quality. Trials T2 and T9 showed the highest scores for 13 and 18 attributes, resp. The different nutrition, addition of GIY and the yeast starter strains diversified and enhanced sensory expression of Catarratto wines.

International Journal of Food Microbiology published new progress about 26S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Formula: C6H12O3.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Capone, D. L. published the artcileInfluence of inclusion of grapevine leaves, rachis and peduncles during fermentation on the flavour and volatile composition of Vitis vinifera cv. Shiraz wine, Computed Properties of 106-32-1, the main research area is Vitis leaf rachis peduncle fermentation flavor volatile composition.

The presence of matter other than grapes (MOG) is common in the winemaking process when sorting equipment is not utilized. Exptl. wines were made to examine the effect of MOG on the sensory profile and chem. composition of wine. A Shiraz wine made without MOG was compared to fermentations with grape leaves, grape stalks (rachis) and peduncles (the stalk connecting the bunch to the vine) added at amounts at or slightly above those found in a com. harvest bin. Fifty-one volatile aroma compounds were quantified in the wines, and sensory descriptive anal. was applied. The wine made with leaves added was rated by the sensory panel similar to the Control and was significantly higher only in pos. aromas such as ′confectionery′ and ′red fruit′ likely due to a higher concentration of hexanol and (Z)-3-hexen-1-ol. The addition of peduncles slightly enhanced ′green′ aroma and flavor. The rachis treatment was high in ′green capsicum/green stalks′ attributes, as well as astringency, and was high in methoxypyrazines. The inclusion of different types of MOG during fermentation can alter the sensory profile and chem. composition of Shiraz wines in varying ways, including extraction of methoxypyrazines from the rachis, resulting in notable ′green′ attributes. The inclusion of MOG is unavoidable in common winemaking practices, especially with the use of mech. harvesting. Determining the influence of MOG on the volatile composition of the finished wine is an important step in manipulating wine style.

Australian Journal of Grape and Wine Research published new progress about Acetates Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Computed Properties of 106-32-1.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Sanchez, Ramon published the artcileVolatile composition and sensory properties of wines from vineyards affected by iron chlorosis, COA of Formula: C9H18O2, the main research area is iron chlorosis 2phenylacetaldehyde 2phenylethanol 2phenylethyl acetate black fruit stress; Aroma; Nutritional stress; Tempranillo; Vitis vinifera.

Recent studies have shown that mild to moderate iron chlorosis can have pos. effects on grape quality potential, including volatile profile. The main objective of this work was to investigate, for the first time, how moderate iron stress in grapevines affects the presence of volatile organic compounds (VOCs) in wines. The study was carried out during 2018-2019 seasons, in 20 Tempranillo vineyard subzones with different degree of iron deficiency, located in Ribera del Duero (North-Central Spain). The results showed that moderate iron stress increased in wines the concentrations of VOCs associated with floral notes, such as 2-phenylacetaldehyde, 2-phenylethanol and 2-phenylethyl acetate, while reducing the presence of C6-alcs., responsible for green-herbaceous aroma. A favorable reduction of pH and a betterment of parameters related to color were detected in wines from iron deficient subzones. Chlorosis incidence was associated to improvements in wine sensory attributes as layer intensity, black fruit and aroma intensity.

Food Chemistry published new progress about Acetates Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, COA of Formula: C9H18O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Sanchez, Ramon published the artcileVolatile composition and sensory properties of wines from vineyards affected by iron chlorosis, Product Details of C11H22O2, the main research area is iron chlorosis 2phenylacetaldehyde 2phenylethanol 2phenylethyl acetate black fruit stress; Aroma; Nutritional stress; Tempranillo; Vitis vinifera.

Recent studies have shown that mild to moderate iron chlorosis can have pos. effects on grape quality potential, including volatile profile. The main objective of this work was to investigate, for the first time, how moderate iron stress in grapevines affects the presence of volatile organic compounds (VOCs) in wines. The study was carried out during 2018-2019 seasons, in 20 Tempranillo vineyard subzones with different degree of iron deficiency, located in Ribera del Duero (North-Central Spain). The results showed that moderate iron stress increased in wines the concentrations of VOCs associated with floral notes, such as 2-phenylacetaldehyde, 2-phenylethanol and 2-phenylethyl acetate, while reducing the presence of C6-alcs., responsible for green-herbaceous aroma. A favorable reduction of pH and a betterment of parameters related to color were detected in wines from iron deficient subzones. Chlorosis incidence was associated to improvements in wine sensory attributes as layer intensity, black fruit and aroma intensity.

Food Chemistry published new progress about Acetates Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Product Details of C11H22O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Sanchez, Ramon published the artcileVolatile composition and sensory properties of wines from vineyards affected by iron chlorosis, Synthetic Route of 5405-41-4, the main research area is iron chlorosis 2phenylacetaldehyde 2phenylethanol 2phenylethyl acetate black fruit stress; Aroma; Nutritional stress; Tempranillo; Vitis vinifera.

Recent studies have shown that mild to moderate iron chlorosis can have pos. effects on grape quality potential, including volatile profile. The main objective of this work was to investigate, for the first time, how moderate iron stress in grapevines affects the presence of volatile organic compounds (VOCs) in wines. The study was carried out during 2018-2019 seasons, in 20 Tempranillo vineyard subzones with different degree of iron deficiency, located in Ribera del Duero (North-Central Spain). The results showed that moderate iron stress increased in wines the concentrations of VOCs associated with floral notes, such as 2-phenylacetaldehyde, 2-phenylethanol and 2-phenylethyl acetate, while reducing the presence of C6-alcs., responsible for green-herbaceous aroma. A favorable reduction of pH and a betterment of parameters related to color were detected in wines from iron deficient subzones. Chlorosis incidence was associated to improvements in wine sensory attributes as layer intensity, black fruit and aroma intensity.

Food Chemistry published new progress about Acetates Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Synthetic Route of 5405-41-4.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics