Month: December 2022

Zhai, Xinyu published the artcileAn efficient method using ultrasound to accelerate aging in crabapple (Malus asiatica) vinegar produced from fresh fruit and its influencing mechanism investigation, Synthetic Route of 41114-00-5, the main research area is crabapple vinegar Malus fresh fruit ultrasound aging; Aroma; Cavitation; Crabapple; Mixed bacteria fermentation; Ultrasonic aging.

In this study, a kind of crabapple vinegar was developed by the method of mixed bacteria fermentation It showed that the total acids and total esters in the vinegar increased by 30.51% and 22.67%, resp. Simultaneously, ultrasound was used to treat the vinegar to shorten the time of aging. In addition, the HS-SPME-GC-MS results show that some volatile components had increased significantly, such as total esters, aldehydes and heterocycles. Combining OAV with radar chart of aroma active ingredients, the order of contribution to the characteristic aroma of crabapple vinegar was esters > alcs. > others > acids. Finally, ultrasonic cavitation and hydroxyl radicals were measured to further prove it could accelerate chem. reaction of crabapple vinegar. The results of FTIR showed that the hydrogen-bonded mols. had increased, while free mols. with irritating taste (such as ethanol and acetic acid) had decreased, which made the taste of crabapple vinegar softer. Results have showed that ultrasound is a promising technique for shortening aging time and it also provides the possibility to improve the taste of fruit vinegar.

Ultrasonics Sonochemistry published new progress about Acids Role: BUU (Biological Use, Unclassified), BIOL (Biological Study), USES (Uses). 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, Synthetic Route of 41114-00-5.

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

Zhai, Xinyu published the artcileAn efficient method using ultrasound to accelerate aging in crabapple (Malus asiatica) vinegar produced from fresh fruit and its influencing mechanism investigation, Quality Control of 123-29-5, the main research area is crabapple vinegar Malus fresh fruit ultrasound aging; Aroma; Cavitation; Crabapple; Mixed bacteria fermentation; Ultrasonic aging.

In this study, a kind of crabapple vinegar was developed by the method of mixed bacteria fermentation It showed that the total acids and total esters in the vinegar increased by 30.51% and 22.67%, resp. Simultaneously, ultrasound was used to treat the vinegar to shorten the time of aging. In addition, the HS-SPME-GC-MS results show that some volatile components had increased significantly, such as total esters, aldehydes and heterocycles. Combining OAV with radar chart of aroma active ingredients, the order of contribution to the characteristic aroma of crabapple vinegar was esters > alcs. > others > acids. Finally, ultrasonic cavitation and hydroxyl radicals were measured to further prove it could accelerate chem. reaction of crabapple vinegar. The results of FTIR showed that the hydrogen-bonded mols. had increased, while free mols. with irritating taste (such as ethanol and acetic acid) had decreased, which made the taste of crabapple vinegar softer. Results have showed that ultrasound is a promising technique for shortening aging time and it also provides the possibility to improve the taste of fruit vinegar.

Ultrasonics Sonochemistry published new progress about Acids Role: BUU (Biological Use, Unclassified), BIOL (Biological Study), USES (Uses). 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Quality Control of 123-29-5.

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

Maeda, Kazuki published the artcileChlorotrifluoromethylation of Terminal Olefins by Atom Transfer-Type Radical Reaction Catalyzed by Cobalt Complexes, Safety of Allyl benzoate, the main research area is alkene terminal trifluoromethanesulfonyl chloride cobalt chlorotrifluoromethylation catalyst; chlorotrifluoromethyl alkane preparation.

A cobalt porphyrin-catalyzed chlorotrifluoromethylation reaction of olefins is described. The use of CF3SO2Cl as the CF3 radical source and a cobalt catalyst enabled the selective addition of CF3 radicals under thermal conditions. Various functional groups such as esters and Ar-X moieties, which can be reactive with low valent transition metal catalysts, were well-tolerated in this catalytic process. A highly functionalized alkaloid derivative was also tolerated as a substrate. As a demonstration of the bio-inspired catalytic system, catalytic usage of vitamin B12, which is the com. available form of the natural cobalt porphyrinoid, was employed, and diastereoselective chlorotrifluoromethylation of the alkaloid mol. was achieved.

European Journal of Organic Chemistry published new progress about Chloroalkanes Role: SPN (Synthetic Preparation), PREP (Preparation) (trifluoromethyl). 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, Safety of Allyl benzoate.

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

Mao, Xiaohui published the artcileCorrosion Behavior of Bitter Almond Oil During Processing, Recommanded Product: Benzyl acetate, the main research area is bitter almond oil processing corrosion behavior.

This study aims to explore the corrosion behavior of bitter almond oil (BAO) during processing. Hydrocyanic acid (HCN) and benzoic acid in oil are speculated as the main components that corrode the screw oil expeller. Immersion and simulation corrosion tests are carried out to verify this hypothesis. Immersion test results show that crude BAO (CBAO) containing 5.07 ± 0.06 mg kg-1 benzoic acid and 4.25 ± 0.04 mg kg-1 HCN exhibits corrosive effects on steel. Simulation corrosion test results indicate that the addition of CN- or benzoic acid has significant effect on the corrosion of steel. Specifically, at ≥1 × 104 mg kg-1 benzoic acid concentration or ≥5 mg kg-1 CN- concentration, the mass of steel blocks in oil decreases and the contents of Fe, Zn, Al, and Mg ions in oil increase significantly. Therefore, HCN in CBAO is the main cause of screw oil expeller corrosion in BAO processing and benzoic acid is the secondary cause. Practical Applications: The corrosion behavior of CBAO not only damages the integrity of the screw oil expeller but also increases the dissolution of toxic metals from the components into oil. The study of corrosion has practical value in taking effective measures, such as detoxification before pressing and addition of natural inhibitors, to reduce corrosion and ensure the quality of CBAO. Corrosion study provides the basis for the selection of steel materials of screw oil expeller.

European Journal of Lipid Science and Technology published new progress about Bitter almond oil 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, Recommanded Product: Benzyl acetate.

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

Wang, Zhen published the artcileA new method to predict the content changes of aroma compounds during the aging process of Niulanshan Baijiu using the GM (1,1) gray model, Recommanded Product: Ethyl nonanoate, the main research area is Niulanshan Baijiu aging aroma compound math model.

Niulanshan Baijiu (NLS), a kind of light-flavor Baijiu, is very popular in China. The gray model [GM (1,1)], a math. model, is used to predict the content changes of key odorants in NLS during the aging process. First, the smell experiment of NLS was carried out by gas chromatog.-olfactometry-mass spectrometry (GC-O-MS). Then, 34 aroma compounds in NLS aged four different years were identified and quantitated, calculated the OAVs of these aroma compounds, there were 18 compounds with OAVs >1, which were considered as important aroma compounds in NLS, and finally, the gray prediction was carried out by modeling the content of these compounds The correlations between the predicted values and actual values were as high as 0.9969. This is the first time that GM (1,1) is used in liquor content anal., and the good prediction results show the applicability of GM (1,1) in predicting the content change of compounds during Baijiu aging.

Flavour and Fragrance Journal published new progress about Aromatic compounds Role: FFD (Food or Feed Use), BIOL (Biological Study), USES (Uses). 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

Barman, Monica published the artcileTemporal relationship between emitted and endogenous floral scent volatiles in summer- and winter-blooming Jasminum species, Synthetic Route of 140-11-4, the main research area is Jasminum floral scent volatile summer winter blooming.

Jasminum spp. is cultivated for their fragrant flowers used in essential oil production and cosmetic uses. An attempt was made to study the temporal variations in floral scent volatiles composition including emitted, free endogenous and glycosyl-linked volatile compounds from two summer-blooming species namely, Jasminum auriculatum and Jasminum grandiflorum as well as from two winter-blooming species namely, Jasminum multiflorum and Jasminum malabaricum. The overall emitted volatile organic compounds (VOCs) were found to be highest when the matrix Porapak Q 80/100 was used with dichloromethane (DCM) as elution solvent. The floral volatile emission from bud to senescence exhibited nocturnal maxima pattern for both the summer-blooming species. Both the winter-blooming species emitted its highest concentration at noon. The free endogenous concentrations of all VOCs were low when corresponding emitted concentrations were high. Enzymic treatment of petal extract revealed that several aromatic volatiles including aromatic alcs. and monoterpenols are synthesized and stored in the flowers as water-soluble glycosides; these compounds were shown to accumulate in higher amounts in flowers at late bud stage. These findings indicate the utilization of the precursors, i.e. the volatile-conjugates, through hydrolysis followed by their release as free-volatiles at flower opening stage. The outcome as a whole suggests a linkage among the temporal pattern of emitted volatiles, free-endogenous volatiles and glycoside-bound volatile compounds in all above studied Jasminum spp. and provided an overview of their floral volatilome.

Physiologia Plantarum published new progress about Aromatic alcohols 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, Synthetic Route of 140-11-4.

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

Wassman, Christopher D. published the artcileComputational identification of a transiently open L1/S3 pocket for reactivation of mutant p53, Product Details of C8H9NO4, the main research area is binding pocket loop1 sheet3 pocket reactivation protein p53; stictic acid reactivation p53 protein osteocarcinoma antitumor.

The tumor suppressor p53 is the most frequently mutated gene in human cancer. Reactivation of mutant p53 by small mols. is an exciting potential cancer therapy. Although several compounds restore wild-type function to mutant p53, their binding sites and mechanisms of action are elusive. Here computational methods identify a transiently open binding pocket between loop L1 and sheet S3 of the p53 core domain. Mutation of residue Cys124, located at the center of the pocket, abolishes p53 reactivation of mutant R175H by PRIMA-1, a known reactivation compound Ensemble-based virtual screening against this newly revealed pocket selects stictic acid as a potential p53 reactivation compound In human osteosarcoma cells, stictic acid exhibits dose-dependent reactivation of p21 expression for mutant R175H more strongly than does PRIMA-1. These results indicate the L1/S3 pocket as a target for pharmaceutical reactivation of p53 mutants.

Nature Communications published new progress about Animal gene, TP53 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 72835-26-8 belongs to class esters-buliding-blocks, name is (2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)methyl propionate, and the molecular formula is C8H9NO4, Product Details of C8H9NO4.

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

Luo, Manli published the artcileMethyl jasmonate pretreatment improves aroma quality of cold-stored ‘Nanguo’ pears by promoting ester biosynthesis, Application In Synthesis of 106-32-1, the main research area is Pyrus aroma methyl jasmonate lipoxygenase ester biosynthesis; LOX pathway; Methyl jasmonate; Transcription factor; Volatile ester; ‘Nanguo’ pear.

Cold storage is widely used for delaying ripening and senescence; however, fruit aroma diminishes noticeably after long-term cold storage. The esters synthesized by the lipoxygenase (LOX) pathway are responsible for ‘Nanguo’ pear aroma. As Me jasmonate (MeJA) is known to act on various fruit qualities, we investigated whether it acts via the LOX pathway in cold-stored ‘Nanguo’ pears. MeJA treatment increased the content of volatile esters and unsaturated fatty acids and the activities of alc. acyltransferase, alc. dehydrogenase, and LOX. It also up-regulated the expression of key genes (PuAAT, PuADH3, PuADH5, PuADH9, PuLOX1, and PuLOX3) in the LOX pathway and that of transcription factors (PuMYB21-like, PuMYB108-like, PuWRKY61, PuWRKY72, and PuWRKY31), whose genes were differentially expressed in preliminary transcriptome anal. Therefore, considering its effects on LOX pathway-related genes and transcription factors, MeJA may be useful in preventing cold-storage-induced decline in ester biosynthesis, aroma, and consequently the quality of cold-stored ‘Nanguo’ pears.

Food Chemistry published new progress about Animal gene Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (AAT). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Application In Synthesis of 106-32-1.

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

Gupta, Abhinaba published the artcileRole of critical area in nanofiltration of fatty acids by polymer membrane, Recommanded Product: Methyl decanoate, the main research area is polydicyclopentadiene eicosapentaenoic docosahexaenoic acid ethyl ester nanofiltration mol size.

Fatty acids are an essential class of raw materials for the chem. industry. Fatty acids find widespread application in food, cosmetics, soaps, surfactants, pharmaceutical, and nutraceutical industry. A specific type of derivative- fatty acid Me esters are used as a bio based alternative to fossil fuels. A lot of research has undergone to develop novel efficient processes to purify fatty acids from reaction mixture or a mixture of fatty acids. Membrane performance is usually dependent on size of the mol. to be separated in the membrane and pore size which decides the rate of permeation of mol. through the membrane. This paper discusses about the performance of two polymer nanofiltration membranes developed recently in purifying a mixture of fatty acids and exhibits critical area being the determinant factor for mols. to permeate through the membrane. Epoxy nanofiltration membranes have separated EPA-EE and DHA-EE from each other based on mol. weight and critical area, whereas these membranes separated, small organic mols. in the mol. weight range 100-300 gmol-1 based on critical area. Epoxy nanofiltration membranes have also successfully separated saturated fatty acids from each other with selectivity of 10:1. Polydicyclopentadiene based nanofiltration membrane have shown to sep. saturated fatty acids from mono and polyunsaturated fatty acids with good selectivity based on critical area. This paper emphasizes critical area is a better representation of mol. size as compared to mol. weight

Materials Today: Proceedings published new progress about Amines Role: BUU (Biological Use, Unclassified), BIOL (Biological Study), USES (Uses). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Recommanded Product: Methyl decanoate.

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

Fan, Lei published the artcileNitazoxanide, an anti-parasitic drug, efficiently ameliorates learning and memory impairments in AD model mice, Name: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, the main research area is nitazoxanide antiparasitic agent learning memory Alzheimer disease; APP/PS1 transgenic mice; Alzheimer’s disease; autophagy; inflammation; nitazoxanide.

The pathogenesis of Alzheimer′s disease (AD) is characterized by both accumulation of β-amyloid (Aβ) plaque and formation of neurofibrillary tangles in the brain. Recent evidence shows that autophagy activation may potently promote intracellular Aβ clearance. Thus targeting autophagy becomes a promising strategy for discovery of drug leads against AD. In the present study, we established a platform to discover autophagy stimulator and screened the lab inhouse FDA-approved drug library. We found that anti-parasitic drug nitazoxanide (NTZ) was an autophagy activator and could efficiently improve learning and memory impairments in APP/PS1 transgenic mice. In BV2 cells and primary cortical astrocytes, NTZ stimulated autophagy and promoted Aβ clearance by inhibiting both PI3K/AKT/mTOR/ULK1 and NQO1/mTOR/ULK1 signaling pathways; NTZ treatment attenuated LPS-induced inflammation by inhibiting PI3K/AKT/IκB/NFκB signaling. In SH-SY5Y cells and primary cortical neurons, NTZ treatment restrained tau hyperphosphorylation through inhibition of PI3K/AKT/GSK3β pathway. The beneficial effects and related signaling mechanisms from the in vitro studies were also observed in APP/PS1 transgenic mice following administration of NTZ (90 mg·kg-1·d-1, ig) for 100 days. Furthermore, NTZ administration decreased Aβ level and senile plaque formation in the hippocampus and cerebral cortex of APP/PS1 transgenic mice, and improved learning and memory impairments in Morris water maze assay. In conclusion, our results highlight the potential of NTZ in the treatment of AD.

Acta Pharmacologica Sinica published new progress about Alzheimer disease 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