Tag: 200-300

Han, Yingying;Du, Jinhua;Song, Zhaolin published 《Effects of the yeast endogenous β-glucosidase on hawthorn (Crataegus pinnatifida Bunge) wine ethyl carbamate and volatile compounds》 in 2021. The article was appeared in 《Journal of Food Composition and Analysis》. They have made some progress in their research.Quality Control of Ethyl tetradecanoate The article mentions the following:

In this study, twenty-three com. yeasts were inoculated into hawthorn (Crataegus pinnatifida, Bunge (Rosaceae)) extracted juice to explore their fermentation characteristics, beta-glucosidase activity, Et carbamate production, volatile compounds of resulted wines, along with the relationship of beta-glucosidase activity on Et carbamate and volatile compounds beta-Glucosidases were yeast and culture medium dependence. However, their activities in wines were merely 9.50%-30.7% of that in YM (yeast extract, malt extract) medium. Et carbamate, which was also yeast dependence, was correlated with beta-glucosidase (0.426*) whereas less affected by physicochem. indexes of hawthron wines. Volatile compounds were not correlated with beta-glucosidase activity whereas related to the physicochem. indexes. alpha-Terpineol, which was originally existed in the juice, was increased by the fermentation, while (-) linalool oxide, rose oxide, linalool, terpinen-4-ol, citronellol and nerolidol were newly produced during fermentation FC9 was the most optimal yeast for hawthorn wine making because of its excellent ethanol production, higher beta-glucosidase activity, moderate amounts of volatile compounds, best sensory score and lower EC (5.48μg/L). And Ethyl tetradecanoate (cas: 124-06-1) was used in the research process.

Ethyl tetradecanoate(cas: 124-06-1) is a labeled component from essential oil of natural hawthorn perfume. Also frequently used in cosmetics, soaps, and flavorings.Quality Control of Ethyl tetradecanoateEthyl myristate is a long-chain fatty acid ethyl ester resulting from the formal condensation of the carboxy group of myristic acid with the hydroxy group of ethanol.

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

Leon-Aparicio, Daniel;Sanchez-Solano, Alfredo;Arreola, Jorge;Perez-Cornejo, Patricia published 《Oleic acid blocks the calcium-activated chloride channel TMEM16A/ANO1》. The research results were published in《Biochimica et Biophysica Acta, Molecular and Cell Biology of Lipids》 in 2022.Synthetic Route of C19H36O2 The article conveys some information:

The calcium-activated chloride channel TMEM16A (ANO1) supports the passive movement of chloride ions across membranes and controls critical cell functions. Here we study the block of wild-type and mutant TMEM16A channels expressed in HEK293 cells by oleic acid, a monounsaturated omega-9 fatty acid beneficial for cardiovascular health. We found that oleic acid irreversibly blocks TMEM16A in a dose- and voltage-dependent manner at low intracellular Ca2+. We tested whether oleic acid interacted with the TMEM16A pore, varying the permeant anion concentration and mutating pore residues. Lowering the permeating anion concentration in the intracellular side did nothing but the blockade was intensified by increasing the anion concentration in the extracellular side. However, the blockade of the pore mutants E633A and I641A was voltage-independent, and the I641A IC50, a mutant with the inner hydrophobic gate in disarray, increased 16-fold. Furthermore, the uncharged methyl-oleate blocked 20-24% of the wild-type and I641A channels regardless of voltage. Our findings suggest that oleic acid inhibits TMEM16A by an allosteric mechanism after the elec. field drives oleic acid’s charged moiety inside the pore. Block of TMEM16A might be why oleic acid has a beneficial impact on the cardiovascular system. The experimental procedure involved many compounds, such as Methyl oleate (cas: 112-62-9) .

Methyl oleate(cas: 112-62-9) is a fatty acid methyl ester resulting from the formal condensation of the carboxy group of oleic acid with methanol.Synthetic Route of C19H36O2 It is also used in biochemical research as a chromatographic reference standard.

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

Recommanded Product: Methyl oleate《Thermo-physical properties of naphthenic-palm oil methyl ester (POME) blended transformer oil》 was published in 2022. The authors were Walvekar, Rashmi;Zairin, Danial Aminin;Khalid, Mohammad;Mubarak, Nabisab Mujawar;Tcsm, Gupta, and the article was included in《Journal of Thermal Analysis and Calorimetry》. The author mentioned the following in the article:

This study aims to investigate the thermal conductivity, viscosity and thermal degradation of naphthenic-based mineral oil, palm oil Me ester (POME) and its blend. Mineral oil and POME were mixed at various mass ratios (70:30, 80:20 and 90:10) via homogenisation for 10 min at 25,000 RPM. The thermo-phys. properties of oil studied were thermal conductivity, viscosity, d., flash point and thermal degradation Results indicated enhancement in thermal conductivity with an increase in temperature The highest enhancement (0.185 W mK^-1) was observed for the 70:30 blend ratio at 80°C. The viscosity decreased as temperature increased, whereby POME resulted in lower values (2.3 mPa.s) than mineral oil (4.3 mPa.s) at 80°C. D. also showed a decreasing trend with temperature with no significant difference between POME and mineral oil. However, POME (175.5°C) resulted in a higher flash point compared to mineral oil (146.5°C), resulting in the enhanced flashpoint of blend oils. Blend oil with a 70:30 ratio resulted in the highest thermal degradation of 274.56°C in the air environment. Oxidation induction time (OIT) decreased with temperature from 160-180°C where mineral oil resulted in higher induction time than POME. The results proved improvement in properties of mineral oil blend with POME, which can enhance the system performance and faster heat dissipation. And Methyl oleate (cas: 112-62-9) was used in the research process.

Methyl oleate(cas: 112-62-9) is a fatty acid methyl ester resulting from the formal condensation of the carboxy group of oleic acid with methanol.Recommanded Product: Methyl oleate Methyl oleate(cas: 112-62-9) is an intermediate for detergents, emulsifiers, wetting agents, stabilizers, textile treatments, plasticizers for duplicating inks, rubbers, waxes etc.

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

Quality Control of Oxacyclohexadecan-2-one《Highly selective macrocyclic ring-closing metathesis of terminal olefins in non-chlorinated solvents at low dilution》 was published in 2019. The authors were Dumas, Adrien;Colombel-Rouen, Sophie;Curbet, Idriss;Forcher, Gwenael;Tripoteau, Fabien;Caijo, Frederic;Queval, Pierre;Rouen, Mathieu;Basle, Olivier;Mauduit, Marc, and the article was included in《Catalysis Science & Technology》. The author mentioned the following in the article:

Bis(cycloalkylarylimidazolylidene)ruthenium indenylidene complexes were prepared as catalysts for ring-closing metatheses of dienes to yield macrocycles, particularly macrocyclic lactone odorants, without isomerization and without using chlorinated solvents. Ring-closing metatheses were performed in EtOAc at 0.01 M substrate concentrations without requiring 1,4-benzoquinone to suppress isomerization. Macrocyclic odorant mols. were prepared in >99% purities by this method. And Oxacyclohexadecan-2-one (cas: 106-02-5) was used in the research process.

Oxacyclohexadecan-2-one(cas:106-02-5) is a monomer used to make PGA-co-pentadecalactone polymers to be used in the development of directly compressed prolonged release tablets of slightly soluble drugs such as ketoprofen.Quality Control of Oxacyclohexadecan-2-oneIt may be used for the synthesis of poly(pentadecanolide) (PPDL) by Novozyme 435 catalyzed ring-opening polymerization.

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

Ji, Peng;Li, Chen-chen;Wei, Yan-ming;Hua, Yong-li;Yao, Wan-ling;Wu, Fan-lin;Zhang, Xiao-song;Yuan, Zi-wen;Zhao, Nian-shou;Zhang, Ya-hui;Wen, Yan-qiao published 《A new method providing complementary explanation of the blood-enriching function and mechanism of unprocessed Angelica sinensis and its four kinds of processed products based on tissue-integrated metabolomics and confirmatory analysis》 in 2022. The article was appeared in 《Biomedical Chromatography》. They have made some progress in their research.Product Details of 112-62-9 The article mentions the following:

Angelica sinensis (AS) is a common Traditional Chinese Medicine used for tonifying blood in China. Unprocessed AS and its four kinds of processed products (ASs) are used to treat blood deficiency syndrome in the country. The different blood-tonifying mechanisms of ASs remain unclear. In this work, a novel method integrating metabolomics and hematol. and biochem. parameters was established to provide a complementary explanation of blood supplementation mechanism of ASs. Our results revealed that different ASs exhibited various blood supplementation effect, and that AS parched with alc. demonstrated the best blood supplementation effect. Eight metabolites from liver tissue and 12 metabolites from spleen tissue were considered to be potential biomarkers. These biomarkers were involved in four metabolic pathways. Correlation anal. results showed that L-aspartic acid and L-alanine (spleen tissue), linoleic acid, and L-cystathionine (liver tissue) exhibited a high pos. or neg. correlation with the aforesaid biochem. indicators. The blood-supplementation effect mechanism of ASs were related to four metabolic pathways. L-Aspartic acid and L-alanine (spleen tissue), linoleic acid, and L-cystathionine (liver tissue) were the four key metabolites associated with the blood supplementation effect of ASs. This study gives a complementary explanation of the blood supplementation effect and mechanism of action of ASs. The experimental procedure involved many compounds, such as Methyl oleate (cas: 112-62-9) .

Methyl oleate(cas: 112-62-9) is a fatty acid methyl ester resulting from the formal condensation of the carboxy group of oleic acid with methanol.Product Details of 112-62-9 It is also used in biochemical research as a chromatographic reference standard.

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

Wang, Fang;Fan, Wanning;Liu, Nian;Sun, Xuemei published 《Effect of Saccharomyces cerevisiae-inoculated milk on the quality of cheese-like products during storage》 in . The article was appeared in 《Journal of Food Processing and Preservation》. They have made some progress in their research.Product Details of 124-06-1 The article mentions the following:

The development of new cheese with novel flavors is an increasing trend in the cheese market. Three exptl. cheese-like products (ECs) with different processing parameters were manufactured from Saccharomyces cerevisiae-fermented milk, and their composition, functionality, volatile compounds, and sensory characteristics were compared with those of model Cheddar cheese (CC) during storage. Compared with CC, ECs had higher moisture content, yield, and pH but lower protein and fat content. In the early stage of storage, CC had the highest hardness and storage modulus, however, these values were higher in ECs than in CC with storing. After 90 days of storage, S. cerevisiae-inoculated milk significantly increased the levels of alcs. and esters in the ECs, contributing to high taste scores, especially ECs manufactured with high saccharose. Overall, cheese-like products manufactured from S. cerevisiae-fermented milk had a high yield, good functionality, and improved flavor profile and taste, with market potential. Novelty impact statement : The development of new cheese with novel flavors is an increasing trend. Cheese-like products were manufactured from Saccharomyces cerevisiae-fermented milk. The resulted product had improved flavor profile and taste, with market potential. And Ethyl tetradecanoate (cas: 124-06-1) was used in the research process.

Ethyl tetradecanoate(cas: 124-06-1) is a natural product found in Psidium guajava, Litchi chinensis, and other organisms.Product Details of 124-06-1Ethyl myristate is a long-chain fatty acid ethyl ester resulting from the formal condensation of the carboxy group of myristic acid with the hydroxy group of ethanol.

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

Sun, Ziyue;Zhao, Yanxia;Prior, Timothy J.;Elsegood, Mark R. J.;Wang, Kuiyuan;Xing, Tian;Redshaw, Carl published 《Mono-oxo molybdenum(VI) and tungsten(VI) complexes bearing chelating aryloxides: synthesis, structure and ring opening polymerization of cyclic esters》. The research results were published in《Dalton Transactions》 in 2019.Related Products of 106-02-5 The article conveys some information:

The mono-oxo aryloxide complexes [M(O)(L¹)₂] (M = Mo (1·hexane), W(2·2MeCN)) were prepared from [Mo(O)(Cl)₄] or [W(O)(Ot-Bu)₄] and two equivalent of the di-phenol 2,2′-ethylidenebis(4,6-di-tert-butylphenol) L¹H₂, resp. Use of in situ generated [Mo(O)(Ot-Bu)₄] with two equivalent of L¹H₂ also gave 1·2MeCN. In the presence of adventitious oxygen, attempts to generate in situ [Mo(O)(Ot-Bu)₄] and reaction with one equivalent of L¹H₂ afforded the bi-metallic complex [Mo(O)(L¹)(μ-O)Li(THF)(MeCN)]₂·2MeCN (3·2MeCN). Use of the tetra-phenol α,α,α’,α’-tetrakis(3,5-di-tert-butyl-2-hydroxyphenyl)-p-xyleneH₄ (L²H₄) with [Mo(O)(Oi-Pr)₄] gave {[Mo(O)]L²}₂ (4), while the analogous W complex {[W(O)]L²}₂ (5) was isolated from the reaction of L²H₄ with [W(O)(Ot-Bu)₄]. Similar reaction of p-tert-butylcalix[4]areneH₄ (L³H₄) with [Mo(O)(Oi-Pr)₄] afforded [Mo(O)L³(NCMe)]·3MeCN (6). Modifications of known routes were employed to access complexes [W(Cl)₂L³]·3.5MeCN (7·3.5MeCN) and [W(O)L³(NCMe)] (8), while use of [WO(Ot-Bu)₄] with L³H₄ unexpectedly afforded [W(Ot-Bu)₂L³]·MeCN (9·MeCN). The mol. crystal structures for 1–9 are reported, and the ability of these complexes to act as catalysts for the ring opening polymerization (ROP) of ε-caprolactone (ε-CL), δ-valerolactone (δ-VL) and ω-pentadecalactone (ω-PDL) was studied. The Mo complexes 1 and 4 were the best performers for ε-Cl and δ-VL, but all complexes exhibited poor control and were also inactive toward the ROP of PDL.Oxacyclohexadecan-2-one (cas: 106-02-5) were involved in the experimental procedure.

Oxacyclohexadecan-2-one(cas:106-02-5) is a monomer used to make PGA-co-pentadecalactone polymers to be used in the development of directly compressed prolonged release tablets of slightly soluble drugs such as ketoprofen.Related Products of 106-02-5It may be used for the synthesis of poly(pentadecanolide) (PPDL) by Novozyme 435 catalyzed ring-opening polymerization.

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

Reference of Diethyl cyclobutane-1,1-dicarboxylate《Preparation of MgCl₂-supported Ziegler-Natta catalyst systems with new electron donors》 was published in 2010. The authors were Marques, Maria de Fatima V.;Cardoso, Renata da Silva;Galvao da Silva, Micheli, and the article was included in《Applied Catalysis, A: General》. The author mentioned the following in the article:

In the present work, the effect of new internal and external electron donors for Ziegler-Natta systems of the type MgCl₂/internal electron donor (ID)/TiCl₄/external electron donor (ED)/AlR₃ was compared with the conventional use of Bu phthalate and dimethoxy-diphenylsilane as electron donors. Catalyst systems employing various internal and external donors were evaluated in propylene polymerization The polymers were characterized by IR absorption spectroscopy, differential scanning calorimetry and heptane extraction The prepared catalysts with the new internal donors produced polypropylene with isotactic index up to 98% under the polymerization conditions employed. And Diethyl cyclobutane-1,1-dicarboxylate (cas: 3779-29-1) was used in the research process.

Diethyl 1,1-cyclobutanedicarboxylate(cas:3779-29-1 Reference of Diethyl cyclobutane-1,1-dicarboxylate) reacts with silicon to form diethyl esters and magnesium to form magnesium salts. The reaction time for this compound is short, which may be due to its ability to undergo debromination.

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

Jennings, Sarah L.;Hoover, Brian A.;Sin, Simon Yung Wa;Ebeler, Susan E. published 《Feather chemicals contain information about the major histocompatibility complex in a highly scented seabird》 in 2022. The article was appeared in 《Proceedings of the Royal Society B: Biological Sciences》. They have made some progress in their research.Computed Properties of C16H32O2 The article mentions the following:

Mate choice informed by the immune genes of the major histocompatibility complex (MHC) may provide fitness benefits including offspring with increased immunocompetence. Olfactory cues are considered the primary mechanism organisms use to evaluate the MHC of potential mates, yet this idea has received limited attention in birds. Motivated by a finding of MHC-dependent mate choice in the Leach’s storm-petrel (Oceanodroma leucorhoa), we examined whether the chem. profiles of this highly scented seabird contain information about MHC genes. Whereas previous studies in birds examined non-volatile compounds, we used gas chromatog.-mass spectrometry to measure the volatile compounds emitted from feathers that potentially serve as olfactory infochems. about MHC and coupled this with locus-specific genotyping of MHC IIB genes. We found that feather chems. reflected individual MHC diversity through interactions with sex and breeding status. Furthermore, similarity in MHC genotype was correlated with similarity in chem. profiles within female-female and male-female dyads. We provide the first evidence that volatile chems. from bird feathers can encode information about the MHC. Our findings suggest that olfaction likely aids MHC-based mate choice in this species and highlight a role for chems. in mediating genetic mate choice in birds where this mode of communication has been largely overlooked.Ethyl tetradecanoate (cas: 124-06-1) were involved in the experimental procedure.

Ethyl tetradecanoate(cas: 124-06-1) is a natural product found in Psidium guajava, Litchi chinensis, and other organisms.Computed Properties of C16H32O2Ethyl myristate is a long-chain fatty acid ethyl ester resulting from the formal condensation of the carboxy group of myristic acid with the hydroxy group of ethanol.

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

Recommanded Product: 106-02-5《Role prediction of Gram-negative species in the resistome of raw cow’s milk》 was published in 2021. The authors were Nikoloudaki, Olga;Lemos, Wilson J. F. Junior;Campanaro, Stefano;Di Cagno, Raffaella;Gobbetti, Marco, and the article was included in《International Journal of Food Microbiology》. The author mentioned the following in the article:

Extended use of antibiotics in dairy farming for therapeutic and prophylactic reasons, but also the higher prevalence of antibiotic resistant bacteria (ARB) in the farm environment raised the concern of consuming raw cow’s milk and its derived products. The aim of this study was to predict by shotgun metagenomic analyses the presence of antibiotic resistance genes (ARGs) mainly correlated with Gram-neg. bacteria in antibiotic residue free raw cow’s milk derived exclusively from healthy animal from South Tyrol (Northern Italy), chosen as a model system. Assessment of shotgun metagenomic data of reconstructed scaffolds, revealed the existence of Pseudomonas spp. as the most abundant Gram-neg. species in the raw cow’s milk samples bearing ARGs. Besides, ARGs also linked to lactic acid bacteria such as Lactococcus sp. and Lactobacillus sp. ARGs correlated to microbiome found in milk samples conferred resistance towards aminoglycoside-streptothricin, beta-lactamase, macrolide, tetracycline, carbapenem, cephalosporin, penam, peptide, penem, fluoroquinolone, chloramphenicol and elfamycin antibiotics. Further bioinformatic processing included de-novo reassembly of all metagenomic sequences from all milk samples in one, to reconstruct metagenome assembled genomes (MAGs), which were further used to investigate mobile genetic elements (MGE). Analyses of the reconstructed MAGs showed that, MAG 9 (Pseudomonas sp1.) contained the oriT gene (origin of transfer gene) needed for transferring virulent factors. Although the presence of Pseudomonas is common in raw cow’s milk, pasteurization treatment reduces their survivability. Nevertheless, attention should be paid on Pseudomonas spp. due to their intrinsic resistance to antibiotics and their capability of transferring virulent factors to other bacteria.Oxacyclohexadecan-2-one (cas: 106-02-5) were involved in the experimental procedure.

Oxacyclohexadecan-2-one(cas:106-02-5) is a monomer used to make PGA-co-pentadecalactone polymers to be used in the development of directly compressed prolonged release tablets of slightly soluble drugs such as ketoprofen.Recommanded Product: 106-02-5It may be used for the synthesis of poly(pentadecanolide) (PPDL) by Novozyme 435 catalyzed ring-opening polymerization.

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