Tag: M.W=150-200

Leng, Peng published the artcileHS-GC-IMS with PCA to analyze volatile flavor compounds of honey peach packaged with different preservation methods during storage, Formula: C10H20O2, the main research area is Amygdalus HSGCIMS PCA storage isoamyl acetate benzaldehyde hexanal nhexanol.

In this study, the flavor fingerprint of post-harvest peach fruits from Amygdalus persica L. Yingshuanghong (YSH) was developed and volatile organic compounds (VOCs) were investigated via headspace-gas chromatog.-ion mobility spectrometry (HS-GC-IMS) combining with principal component anal. (PCA). Results identified 52 signal peaks corresponding to 32 compounds were classify as esters, aldehydes, ketones, and alcs. However, 10 compounds were unknown. Differences in the VOCs of peach fruits packaged with different preservation methods during storage were revealed in topog. plots and fingerprints. Increased storage time increase the YSH’s VOCs content produced due to ripening, especially esters, such as isoamyl acetate, Et octanoate, and Et butyrate. In contrast, the content of aldehydes and alcs. contents decreased, including benzaldehyde, (E)-2-hexenal, 2-methylbutanal, hexanal and n-hexanol. Subsequently, PCA was performed based on the signal intensity of the identified VOCs, and the results clearly showed that these samples would be well distinguished in a relatively independent space. The Y2 group (nano-composition packaging materials) had a good application prospect in the post-harvest preservation of honey peaches. Flavor visual spectrum could be of great potential to predict the maturity of the fruits and evaluate preservation efficiency differences in the future.

LWT–Food Science and Technology published new progress about Aldehydes Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), 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

Lopes, Ana Claudia Alencar published the artcileProduction and characterization of a new distilled beverage from green coffee seed residue, Formula: C11H22O2, the main research area is green coffee seed residue beverage; Coffee byproducts; Coffee spirit; Volatile compounds.

This study evaluated green coffee seed residue (GCSR) as an alternative substrate for producing distilled beverages. Two proportions of GCSR, 10% and 20% (w/v), were fermented and distilled in a copper alembic still. The spirits were characterized by GC-FID, HS-SPME GC-MS, and sensory anal. by trained panelists. Most of the 62 identified volatile compounds were affected by the GCSR concentration Total terpenes, higher alcs., and acetals showed the highest concentrations in the 10% GCSR spirit. Esters, acetates, and aldehydes were most abundant in the 20% GCSR. In the sensory anal., the 10% GCSR spirit was characterized by floral, dairy, and almond aromas, while the 20% GCSR spirit was embodied coffee, vegetable, hazelnut, cooked cabbage, and nut descriptors. The results demonstrate the potential of GCSR as a substrate for producing coffee spirits with chem. and sensory qualities, with the 10% GCSR being the better option for fermentation

Food Chemistry published new progress about Almond. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Formula: C11H22O2.

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

Qian, Heying published the artcileMetabolic characterization of hemolymph in Bombyx mori varieties after Bombyx mori nucleopolyhedrovirus infection by GC-MS-based metabolite profiling, SDS of cas: 110-42-9, the main research area is BmNPV infection hemolymph oxidative phosphorylation GC MS.

The “”Huakang 2″” silkworm variety, bred by the Sericulture Research Institute of the Chinese Academy of Agricultural Sciences, is highly resistant to Bombyx mori nucleopolyhedrovirus (BmNPV) and effectively solves the issue of frequent Bombyx mori nuclear polyhedrosis in sericultural production The mol. mechanism of its resistance to BmNPV, however, is still unknown. The purpose of the present study was therefore to identify these anti-BmNPV mechanisms by using metabolomics in combination with transcriptomics after s.c. injection of budded virus (BV) with high concentrations of BmNPV from specimens of the Baiyu N variety (which is highly resistant to BmNPV) and the Baiyu variety (which is sensitive to BmNPV). A total of 375 differential metabolites were identified, which mainly included sugars, acids, amines, alcs., glycosides, and other small mols. KEGG enrichment anal. and functional clustering of differential metabolites identified possible metabolic pathways, including tyrosine metabolism, oxidative phosphorylation, and alanine, aspartate, and glutamate metabolism The differentially expressed genes (DEGs) identified by transcriptome anal. were annotated in KEGG. Association anal. showed that the metabolic pathways of different silkworm varieties are affected differently by BmNPV infection, triggering a series of complex physiol. and biochem. changes in the organism. In particular, oxidative phosphorylation might be an essential pathway involved in regulation of disease resistance.

Archives of Virology published new progress about Amines Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, SDS of cas: 110-42-9.

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

Qian, Heying published the artcileMetabolic characterization of hemolymph in Bombyx mori varieties after Bombyx mori nucleopolyhedrovirus infection by GC-MS-based metabolite profiling, COA of Formula: C9H18O2, the main research area is BmNPV infection hemolymph oxidative phosphorylation GC MS.

The “”Huakang 2″” silkworm variety, bred by the Sericulture Research Institute of the Chinese Academy of Agricultural Sciences, is highly resistant to Bombyx mori nucleopolyhedrovirus (BmNPV) and effectively solves the issue of frequent Bombyx mori nuclear polyhedrosis in sericultural production The mol. mechanism of its resistance to BmNPV, however, is still unknown. The purpose of the present study was therefore to identify these anti-BmNPV mechanisms by using metabolomics in combination with transcriptomics after s.c. injection of budded virus (BV) with high concentrations of BmNPV from specimens of the Baiyu N variety (which is highly resistant to BmNPV) and the Baiyu variety (which is sensitive to BmNPV). A total of 375 differential metabolites were identified, which mainly included sugars, acids, amines, alcs., glycosides, and other small mols. KEGG enrichment anal. and functional clustering of differential metabolites identified possible metabolic pathways, including tyrosine metabolism, oxidative phosphorylation, and alanine, aspartate, and glutamate metabolism The differentially expressed genes (DEGs) identified by transcriptome anal. were annotated in KEGG. Association anal. showed that the metabolic pathways of different silkworm varieties are affected differently by BmNPV infection, triggering a series of complex physiol. and biochem. changes in the organism. In particular, oxidative phosphorylation might be an essential pathway involved in regulation of disease resistance.

Archives of Virology published new progress about Amines Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), 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

Jeong, Yun-Kyung published the artcileIntramolecular hydroalkoxylation in Bronsted acidic ionic liquids and its application to the synthesis of (±)-centrolobine, Computed Properties of 86549-27-1, the main research area is sulfonic acid substituted triazolium imidazolium ionic liquid preparation; cyclic ether preparation; racemic centrolobine stereoselective preparation; hydroalkoxylation unsaturated alc sulfonic acid substituted ionic liquid catalyst; stereoselective cyclization unsaturated alc sulfonic acid substituted ionic liquid; Bronsted acidic ionic liquid preparation catalyst stereoselective cyclization.

Sulfonic acid-substituted triazolium and imidazolium ionic liquids such as I·CF3SO3- (X = N, CH) are prepared; I·CF3SO3- (X = N, CH) act as catalysts for the cyclization reactions of alkenyl alcs. such as HOCH2CMe2CH2CH:CH2 to give cyclic ethers such as 2,4,4-trimethyltetrahydrofuran. (±)-Centrolobine II (R = H) is prepared using the stereoselective cyclization of III to II (R = PhCH2) in the presence of I·CF3SO3- (X = N or CH) as the key step; III is prepared in three steps from p-anisaldehyde and 4-benzyloxyphenylethyl bromide. I·CF3SO3- (X = N) can be used three times for the cyclization of 2,2-diphenyl-4-penten-1-ol to 2-methyl-4,4-diphenyltetrahydrofuran.

Organic & Biomolecular Chemistry published new progress about Cyclic ethers Role: SPN (Synthetic Preparation), PREP (Preparation). 86549-27-1 belongs to class esters-buliding-blocks, name is Ethyl 2,2-dimethylpent-4-enoate, and the molecular formula is C9H16O2, Computed Properties of 86549-27-1.

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

Jiang, Xiaohui published the artcileEffects of pectinase treatment on the physicochemical and oenological properties of red dragon fruit wine fermented with Torulaspora delbrueckii, Name: Ethyl nonanoate, the main research area is Torulaspora Hylocereus fruit wine pectinase fermentation.

Red dragon fruit is a popular tropical fruit that has been highly prized for its health benefits partially attributed to the high antioxidant content. Nevertheless, besides being consumed fresh, further processing into juice or other products is scarce due to its high pectin content that presents a challenge in industrial processing. In this study, we evaluated the effects of pectinase pre-treatment on red dragon fruit wine fermented with Torulaspora delbrueckii. Pectinase enzyme (Pectinex Ultra SP-L, added at 0.1% volume/volume) was applied after pasteurization of juice followed by fermentation with T. delbrueckii at 20°C for 14 days. Pectinase pre-treatment did not affect the yeast growth, nor the production of ethanol (8% volume/volume) and glycerol (6 g/L), but significantly increased juice/wine yield by 16% volume/volume In addition, pectinase treated samples after fermentation remained significantly higher levels of residual nitrogen containing compounds, indicating unfavorable fermentation conditions and impaired metabolism of the yeast. Moreover, fermented pectinase treated samples possessed the aroma compound profiles with enriched esters and terpenes but decreased higher alcs. Furthermore, pectinase treatment increased the total phenolic content, but decreased betacyanins content and color intensity compared to control sample. The findings would have practical significance for diversifying products from red dragon fruit.

LWT–Food Science and Technology published new progress about Fermentation. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Name: Ethyl nonanoate.

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

Zhang, Xin published the artcileComprehensive identification of molecular profiles related to sensory and nutritional changes in Mongolian cheese during storage by untargeted metabolomics coupled with quantification of free amino acids, Quality Control of 111-11-5, the main research area is cheese sensory property nutrition storage metabolomics FFA; Amino acids quantification; Flavor; Metabolic pathway; Metabolites; Metabolomics; Mongolian cheese; Sensory evaluation; Volatile compounds.

Non-targeted metabolomics was used to study metabolites with low mol. weight which may contribute to quality deterioration of Mongolian cheese during storage. Microbiol. anal., pH, FAAs (free amino acids), volatile compounds, and sensory evaluation of the cheese during storage were also studied. A total of 278 metabolites were identified in Mongolian cheese, of which 51 metabolites were used as differential metabolites, including amino acids, peptides, organic acids, lipids, and carbohydrates. Bitter amino acids, bitter peptide (Phe-Ile), and organic acids (sinapic acid, butyric acid) increased during storage. Metabolic pathway anal. showed that differential metabolites were mainly related to amino acid metabolism, such as β-alanine metabolism and glycine, serine, and threonine metabolism Moreover, accompanied with the increased contents of short-chain fatty acids, 2-undecanone and Et esters, strength of odor and unpleasant smell increased but overall acceptability decreased during Mongolian cheese storage. This research provides suitable strategies for quality control of Mongolian cheese during shelf life.

Food Chemistry published new progress about Carbohydrates Role: ANT (Analyte), FFD (Food or Feed Use), ANST (Analytical Study), BIOL (Biological Study), USES (Uses). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Quality Control of 111-11-5.

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

Ceccoli, Romina D. published the artcileGenome mining reveals new bacterial type I Baeyer-Villiger monooxygenases with (bio)synthetic potential, Application In Synthesis of 140-11-4, the main research area is genome mining type I Baeyer Villiger monooxygenase Bradyrhizobium; ketone oxidation lactone production Baeyer Villiger monooxygenase Bradyrhizobium.

Baeyer-Villiger monooxygenases (BVMOs) are oxidoreductases that catalyze the oxidation of ketones in a very selective manner. By genome mining we detected seven putative type I BVMOs in Bradyrhizobium diazoefficiens USDA 110. As we established the phylogenetic relationships among them and with other type I BVMOs, we found out that they belong to different clades of the phylogenetic tree. Thus, we decided to clone and heterologously express five of them. Three of them, each one from a divergent phylogenetic group, were obtained as soluble proteins, allowing us to proceed with their biocatalytic assessment and enzymic characterization. As to substrate scope and selectivity, we observed a complementary behavior among the three BVMOs. BVMO2 was the more versatile biocatalyst in whole-cell systems while BVMO4 and BVMO5 showed a narrow substrate profile with preference for linear ketones and particular regioselectivity for (±)-cis-bicyclo[3.2.0]hept-2-en-6-one.

Molecular Catalysis published new progress about Baeyer-Villiger oxidation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Application In Synthesis of 140-11-4.

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

Rubial, Belen published the artcileSilylium-Catalyzed Alkynylation and Etherification Reactions of Benzylic Acetates, Recommanded Product: Benzyl acetate, the main research area is propargyl arene benzyl alkyl ether preparation; benzyl acetate trimethylalkynylsilane alkynation bistriflimide catalyst; trimethylalkoxysilane benzyl acetate etherification bistriflimide catalyst.

Addition of catalytic amounts of bistriflimide triggers useful coupling reactions of acetates e.g., 1-phenylethyl acetate with trimethyl(alkynyl)silanes e.g., (phenylacetylenyl)trimethylsilane and trimethyl(alkoxy)silanes e.g., trimethyl(2-phenylethoxy)silane to afford propargyl arenes e.g., 1,3-diphenylbut-1-yne and benzyl alkyl ethers e.g., [1-(2-phenylethoxy)ethyl]benzene resp. The added acid assists the release of reactive trimethylsilylium ion into the reaction media, which were found to act as the ultimate catalytic species responsible for the C-C and the C-O forming steps. The cationic nature of these coupling processes is documented.

European Journal of Organic Chemistry published new progress about Alkoxysilanes Role: RCT (Reactant), RACT (Reactant or Reagent). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Recommanded Product: Benzyl acetate.

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

Frank, Damian published the artcileVolatile and non-volatile metabolite changes in 140-day stored vacuum packaged chilled beef and potential shelf life markers, Category: esters-buliding-blocks, the main research area is volatile nonvolatile metabolite vacuum package chill beef; Beef; Metabolites; Odor; PTR-MS; Vacuum packaging; Volatiles.

During storage of vacuum packaged chilled beef (VPCB), lactic acid bacteria become the dominant microflora, facilitating an extended shelf life. However, at some point, (bio)chem. and organoleptic changes render the meat unacceptable. In this investigation we evaluated volatile and non-volatile metabolite changes in VPCB after 84-, 98-, 120- and 140-days storage at ∼ – 1°C. After 140-days storage, the sensory, volatile and non-volatile data did not indicate spoilage. Minimal changes in volatile signatures of collected weep and on raw and grilled steaks were measured. Changes in selected non-volatile components indicated increased proteolysis (free amino acids, carnosine) and changes in organic acids (lactic, succinic) and nucleotide metabolism Rapid volatile profiling using proton transfer reaction mass spectrometry showed a clear progression of changes in selected compounds over the storage period. An increased concentration of ethanol and other compounds between 120 and 140 days, suggested that volatile changes may be a useful objective indicator of extended storage VPCB quality.

Meat Science published new progress about Alkanes Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Category: esters-buliding-blocks.

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