Month: December 2022

Zhang, Xiao-Juan published the artcileIdentification of age-markers based on profiling of Baijiu volatiles over a two-year maturation period: Case study of Lu-flavor Baijiu, Computed Properties of 41114-00-5, the main research area is Lu flavor Baijiu volatile maturation period identification.

Baijiu is a highly-valued traditional Chinese distilled alc. liquor and maturation markedly improves its sensory qualities and market value. Identification of age-markers is challenging because of the complexity of the endogenous chem. profile and the absence of exogenous components added during maturation. Here, freshly-distilled raw Lu-flavor Baijiu samples were stored for two years and non-targeted screening for age-markers based on the volatile profile characterized by solid-phase micro-extraction assisted GC-MS. The resulting volatile datasets were analyzed by partial least-squares discriminant anal., Spearman’s correlation and Random-forest decision-tree, to identify potential age-markers. The contents of long chain fatty acid Et esters varied the most during maturation, mostly being absent in freshly-distilled Baijiu, but appearing at different times. Similar behavior was observed in bottled samples matured up to four years. In addition, a slight increase in short/medium chain fatty acid ester content was observed Unsupervised PCA anal., applied only to the fatty acid Et ester dataset, was able to distinguish between bottled Baijiu samples matured for one, two, three, or four years. These age-markers may help establish a reliable model for verifying the maturation time of Lu-flavor Baijiu. This screening approach should be adaptable to other alc. liquors, for quality assessment and authenticity testing.

LWT–Food Science and Technology published new progress about Alcoholic beverages. 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, Computed Properties of 41114-00-5.

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

Zhang, Xiao-Juan published the artcileIdentification of age-markers based on profiling of Baijiu volatiles over a two-year maturation period: Case study of Lu-flavor Baijiu, Safety of Ethyl nonanoate, the main research area is Lu flavor Baijiu volatile maturation period identification.

Baijiu is a highly-valued traditional Chinese distilled alc. liquor and maturation markedly improves its sensory qualities and market value. Identification of age-markers is challenging because of the complexity of the endogenous chem. profile and the absence of exogenous components added during maturation. Here, freshly-distilled raw Lu-flavor Baijiu samples were stored for two years and non-targeted screening for age-markers based on the volatile profile characterized by solid-phase micro-extraction assisted GC-MS. The resulting volatile datasets were analyzed by partial least-squares discriminant anal., Spearman’s correlation and Random-forest decision-tree, to identify potential age-markers. The contents of long chain fatty acid Et esters varied the most during maturation, mostly being absent in freshly-distilled Baijiu, but appearing at different times. Similar behavior was observed in bottled samples matured up to four years. In addition, a slight increase in short/medium chain fatty acid ester content was observed Unsupervised PCA anal., applied only to the fatty acid Et ester dataset, was able to distinguish between bottled Baijiu samples matured for one, two, three, or four years. These age-markers may help establish a reliable model for verifying the maturation time of Lu-flavor Baijiu. This screening approach should be adaptable to other alc. liquors, for quality assessment and authenticity testing.

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

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

An, Xiaowen published the artcileAnalysis of flavor-related compounds in fermented persimmon beverages stored at different temperatures, COA of Formula: C10H20O2, the main research area is fermented persimmon beverage temperature flavor compound.

Storage temperature plays a very important role in the flavor development of fermented beverages. In this study, fermented persimmon beverage was stored for one year to study the changes in flavor-related compounds during storage at different temperatures Fresh persimmon beverage and fermented beverages stored at 10, 20, and 30°C had different tastes, distinguished by electronic tongue (ET). The fermented beverage was sweet when stored at 10°C and salty when stored at 20°C or above. A total of 658 nonvolatile metabolites were identified, among which quercetin and epicatechin were detected by a liquid chromatog.-mass spectrometry (LC-MS) based metabolomics approach from four fermented beverage samples. The volatile compounds in the beverages were determined by headspace solid phase microextraction, combined with gas chromatog.-mass spectrometry (HS-SPME-GC-MS) and gas phase-ion migration spectroscopy (GC-IMS), resp. showing totals of 47 and 69 compounds in the four beverage samples. As detected by both methods, Et acetate, Et hexanoate, Et octanoate, ethanol, and acetic acid were all found in beverages stored at different temperatures and the results showed that a higher storage temperature resulted an increase in the number of volatile compounds in the beverage. However, fermented persimmon beverage stored at low temperatures had a better taste and flavor characteristics.

LWT–Food Science and Technology published new progress about Aftertaste. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, COA of Formula: C10H20O2.

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

An, Xiaowen published the artcileAnalysis of flavor-related compounds in fermented persimmon beverages stored at different temperatures, Formula: C11H22O2, the main research area is fermented persimmon beverage temperature flavor compound.

Storage temperature plays a very important role in the flavor development of fermented beverages. In this study, fermented persimmon beverage was stored for one year to study the changes in flavor-related compounds during storage at different temperatures Fresh persimmon beverage and fermented beverages stored at 10, 20, and 30°C had different tastes, distinguished by electronic tongue (ET). The fermented beverage was sweet when stored at 10°C and salty when stored at 20°C or above. A total of 658 nonvolatile metabolites were identified, among which quercetin and epicatechin were detected by a liquid chromatog.-mass spectrometry (LC-MS) based metabolomics approach from four fermented beverage samples. The volatile compounds in the beverages were determined by headspace solid phase microextraction, combined with gas chromatog.-mass spectrometry (HS-SPME-GC-MS) and gas phase-ion migration spectroscopy (GC-IMS), resp. showing totals of 47 and 69 compounds in the four beverage samples. As detected by both methods, Et acetate, Et hexanoate, Et octanoate, ethanol, and acetic acid were all found in beverages stored at different temperatures and the results showed that a higher storage temperature resulted an increase in the number of volatile compounds in the beverage. However, fermented persimmon beverage stored at low temperatures had a better taste and flavor characteristics.

LWT–Food Science and Technology published new progress about Aftertaste. 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

Munoz-Gonzalez, Carolina published the artcileEffects of ethanol concentration on oral aroma release after wine consumption, Computed Properties of 106-32-1, the main research area is wine ethanol fruity ester oral aroma release; aroma persistence; ethanol; intra-oral SPME; oral aroma release; wine.

This paper evaluates, for the first time, the effects of ethanol concentration on the dynamics of oral (immediate and prolonged) aroma release after wine consumption. To do this, the intraoral aroma release of 10 panelists was monitored at two sampling points (0 and 4 min) after they rinsed their mouths with three rose wines with different ethanol content (0.5% volume/volume, 5% volume/volume and 10% volume/volume) that were aromatized with six fruity esters (Et butanoate, isoamyl acetate, Et pentanoate, Et hexanoate, Et octanoate and Et decanoate). Overall, the results indicated that the extent of the effects of ethanol content on the oral aroma release were influenced by the subject, the ethanolconcn. and the type of aroma compound This effect was also different in the immediate than in the prolonged aroma release. In the first in-mouth aroma monitoring, an increase in the ethanol content provoked a higher release of the more polar and volatile esters (Et butanoate, Et pentanoate), but a lower release for the more apolar and less volatile esters (Et octanoate, Et decanoate). Regarding the prolonged oral aroma release, an increase of ethanol content in wine increased the oral aroma release of the six esters, which might also increase the fruity aroma persistence in the wines. Future works with a higher number of individuals will be needed to understand the mechanisms behind this phenomenon.

Molecules published new progress about Homo sapiens. 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

Choi, Inkyu published the artcileIn silico and in vitro insights into tyrosinase inhibitors with a 2-thioxooxazoline-4-one template, SDS of cas: 623-50-7, the main research area is thioxooxazolineone template tyrosinase inhibitor insilico invitro insight; 2-thioxooxazoline-4-one; Anti-melanogenesis; Docking simulation; Kojic acid; Tyrosinase; β-phenyl-α,β-unsaturated carbonyl scaffold.

The β-phenyl-α,β-unsaturated carbonyl (PUSC) scaffold confers tyrosinase inhibitory activity, and in the present study, 16 (Z)-5-(substituted benzylidene)-3-phenyl-2-thioxooxazolidin-4-one analogs containing this scaffold were synthesized. Mushroom tyrosinase inhibitory activities were examined Compound 1c (IC50 = 4.70 ± 0.40 μM) and compound 1j (IC50 = 11.18 ± 0.54 μM) inhibited tyrosinase by 4.9 and 2.1-fold, resp., and did so more potently than kojic acid (IC50 = 23.18 ± 0.11 μM). Kinetic anal. of tyrosinase inhibition revealed that 1c and 1j inhibited tyrosinase competitively. Results of docking simulation with mushroom tyrosinase using four docking programs suggested that 1c and 1j bind more strongly than kojic acid to the active site of tyrosinase and supported kinetic findings that both compounds are competitive inhibitors. The docking results of human tyrosinase homol. model indicated that 1c and 1j can also strongly inhibit human tyrosinase. EZ-cytox assays revealed 1c and 1j were not cytotoxic to B16F10 melanoma cells. The effects of 1c and 1j on cellular tyrosinase activity and melanin production were also investigated in α-MSH- and IBMX-co-stimulated these cells. Both compounds significantly and dose-dependently reduced tyrosinase activity, and at 10 μM were more potent than kojic acid at 20μM. Compounds 1c and 1j also inhibited melanogenesis, which suggested that the inhibitory effects of these compounds on melanin production were mainly attributable to their inhibitions of tyrosinase. These results indicate that compounds 1c and 1j with the PUSC scaffold have potential use as whitening agents for the treatment of hyperpigmentation-associated diseases.

Computational and Structural Biotechnology Journal published new progress about Cytotoxicity. 623-50-7 belongs to class esters-buliding-blocks, name is Ethyl 2-hydroxyacetate, and the molecular formula is C4H8O3, SDS of cas: 623-50-7.

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

Costa do Nascimento, Debora published the artcileFlash point prediction with UNIFAC type models of ethylic biodiesel and binary/ternary mixtures of FAEEs, Synthetic Route of 106-32-1, the main research area is flash point UNIFAC model ethylic biodiesel binary ternary mixture.

In order to guarantee safe handling of a combustible liquid, such as biodiesel, it is important to be aware of its Flash Point (FP). Thus, the present study focused on FP exptl. measurement and thermodn. correlation of binary and ternary mixtures of saturated or unsaturated fatty acid Et esters (FAEEs) as surrogates for biodiesel. FP of different types of ethylic biodiesel in terms of feedstock (canola, corn, cotton and soy oils) were also measured and compared with the predicted values. Experiments were carried out in agreement with the standard closed cup procedure ASTM D6450. Liaw’s model was applied to FP prediction, with liquid phase non-ideality description accounted for by UNIFAC group contribution models (Original UNIFAC, UNIFAC-Dortmund and UNIFAC-Bessa with revised parameters for fats). FP prediction accounting for non-ideality proved to be accurate, with some difference between the UNIFAC type models and Root Mean Square Deviations (RMSD) varying from 0.27 K to 3.95 K for binary and ternary mixtures

Fuel published new progress about Corn-oil fatty acids, Et esters Role: PRP (Properties), TEM (Technical or Engineered Material Use), USES (Uses). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Synthetic Route of 106-32-1.

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

Kihara, Nobuhiro published the artcileEnhancement of Acid-Catalyzed Esterification by the Addition of Base, COA of Formula: C9H10O2, the main research area is benzoic acid alc esterification kinetics.

General acid-catalyzed reaction can be enhanced by the addition of base. Self-catalyzed esterification of benzoic acid and octan-1-ol was enhanced by the addition of certain base such as imidazole. The rate of the esterification was accelerated as the concentration of imidazole increased. Trans-esterification of 4-nitrophenyl acetate was promoted in chloroform by the mixture of benzoic acid and imidazole, but not by benzoic acid or imidazole alone.

Helvetica Chimica Acta published new progress about Esterification. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, COA of Formula: C9H10O2.

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

Hamed, Manal A. published the artcileBioactive compounds and therapeutic role of Brassica oleracea L. seeds in rheumatoid arthritis rats via regulating inflammatory signalling pathways and antagonizing interleukin-1 receptor action, Product Details of C23H46O2, the main research area is Brassica seed antiinflammatory interleukin1R rheumatoid arthritis; Brassica oleracea L.; IL-1 receptor antagonist; arthritis index; oxidative stress; phenolic compounds; rheumatoid arthritis.

Rheumatoid arthritis (RA) is a chronic, progressive autoimmune disease characterized by aggressive and systematic polyarthritis. The present study aimed to isolate and identify the phenolic constituents in Brassica oleracea L. (Brassicaceae) seeds methanolic extract and evaluates its effect against rheumatoid arthritis in rats referring to the new therapy; interleukin-1 receptor antagonist (IL-1RA). The GC/MS profiling of the plant was determined Arthritis induction was done using complete Freund′s adjuvant. Arthritis severity was assessed by percentage of edema and arthritis index. IL-1 receptor type I gene expression, interleukin-1β (IL-1β), oxidative stress markers, protein content, inflammatory mediators, prostaglandin-E2 (PGE2), genetic abnormalities and the histopathol. features of ankle joint were evaluated. For the first time twelve phenolic compounds had been isolated from the seeds extract Treatment with extract and IL-1RA improved the tested parameters by variable degrees. RA is an irreversible disease, where its severity increases with the time of induction. Brassica oleracea L. seeds extract is considered as a promising anti-arthritis agent. IL-1 RA may be considered as an unusual therapeutic agent for RA disease. More studies are needed to consider the seeds extract as a nutraceutical agent and to recommend IL-1RA as a new RA drug.

Biomarkers published new progress about Anti-inflammatory agents. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Product Details of C23H46O2.

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

Bagheri, Ashkan published the artcileInterferon-inducer antivirals: Potential candidates to combat COVID-19, Synthetic Route of 55981-09-4, the main research area is review interferon modifier antiviral agent COVID19; Antiviral; COVID-19; Immune system; Interferon; Pandemic; Severe acute respiratory syndrome coronavirus 2.

Coronavirus disease 2019 (COVID-19) is an infective disease generated by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Given the pandemic urgency and lack of an effective cure for this disease, drug repurposing could open the way for finding a solution Lots of investigations are ongoing to test the compounds already identified as antivirals. On the other hand, induction of type I interferons are found to play an important role in the generation of immune responses against SARS-CoV-2. Therefore, it was opined that the antivirals capable of triggering the interferons and their signaling pathway, could rationally be beneficial for treating COVID-19. On this basis, using a database of antivirals, called drugvirus, some antiviral agents were derived, followed by searches on their relevance to interferon induction. The examined list included drugs from different categories such as antibiotics, immunosuppressants, anti-cancers, non-steroidal anti-inflammatory drugs (NSAID), calcium channel blocker compounds, and some others. The results as briefed here, could help in finding potential drug candidates for COVID-19 treatment. However, their advantages and risks should be taken into account through precise studies, considering a systemic approach. Even though the adverse effects of some of these drugs may overweight their benefits, considering their mechanisms and structures may give a clue for designing novel drugs in the future. Furthermore, the antiviral effect and IFN-modifying mechanisms possessed by some of these drugs might lead to a synergistic effect against SARS-CoV-2, which deserve to be evaluated in further investigations.

International Immunopharmacology published new progress about Anthracyclines Role: PAC (Pharmacological Activity), THU (Therapeutic Use), BIOL (Biological Study), USES (Uses). 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, Synthetic Route of 55981-09-4.

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