Tag: M.W=250-300

Hernandez-Fernandez, Miguel Angel published the artcileVolatile compounds and fatty acids in oleoresins from Vanilla Planifolia Andrews obtained by extraction with supercritical carbon dioxide, HPLC of Formula: 41114-00-5, the main research area is carbon dioxide Vanilla Planifolia extraction fatty acid oleoresin.

Vanilla is currently sold as an Et alc. extract, typically at a concentration of 35% (volume/volume). Alc. extracts have some disadvantages, such as high concentrations of organic residues, long extraction times and the requirement of large volumes when used as a flavoring. In contrast, supercritical fluid extraction (SFE) allows isolation of high-purity oleoresins without co-extraction of undesired organic residues, thereby preserving the desired volatile compounds in vanilla. In this study, we identified and quantified volatile compounds and fatty acids in four oleoresins and two ethanolic extracts of cured Vanilla planifolia Andrews beans following 10 or 20 sun-drying and sweating cycles (SS). SFE was carried out at a pressure of 20 MPa at 40°C, 50°C, or 60°C, and the resulting vanilla oleoresins were analyzed with GC-MS and GC-FID. The major compounds identified in the extracts were o-guaiacol, p-creosol, p-vinylguaiacol, p-hydroxybenzaldehyde, vanillic acid and vanillin.

CyTA–Journal of Food published new progress about Fatty acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, HPLC of Formula: 41114-00-5.

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

Costa, Tania Maria published the artcileKinetics Analysis of the Inhibitory Effects of Alpha-Glucosidase and Identification of Compounds from Ganoderma lipsiense Mycelium, Application of Ethyl pentadecanoate, the main research area is Ganoderma mycelium alpha glucosidase kinetics; Alpha-glucosidase inhibitors; Competitive inhibition; Ganoderma lipsiense; Phenolic compounds; Submerged fermentation; Uncompetitive inhibition.

The studies on natural compounds to diabetes mellitus treatment have been increasing in recent years. Research suggests that natural components can inhibit alpha-glucosidase activities, an important strategy in the management of blood glucose levels. In this work, for the first time in the literature, the compounds produced by Ganoderma lipsiense extracts were identified and evaluated on the inhibitory effect of these on alpha-glucosidase activity. Four phenolic compounds were identified by high-performance liquid chromatog.-electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS) to crude extract from G. lipsiense grown in red rice medium (RCE) and synthetic medium (SCE), being syringic acid identified in both extracts Gas chromatog.-mass spectrometry (GC-MS) anal. showed fatty acids and their derivatives, terpene, steroid, niacin, and nitrogen compounds to SCE, while RCE was rich in fatty acids and their derivatives Both extracts demonstrated alpha-glucosidase inhibition (RCE IC50 = 0.269 ± 8.25 mg mL-1; SCE IC50 = 0.218 ± 9.67 mg mL-1), and the purified hexane fraction of RCEdemonstrated the highest inhibition of enzyme (81.1%). Studies on kinetic inhibition showed competitive inhibition mode to RCE, while SCE showed uncompetitive inhibition mode. Although the inhibitory effects of RCE and SCE were satisfactory, the present findings identified some unpublished compounds to G. lipsiense in the literature with important therapeutic properties.

Applied Biochemistry and Biotechnology published new progress about Fatty acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, Application of Ethyl pentadecanoate.

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

Yamaga, Hiroaki published the artcileAmino acid derivative reactivity assay-organic solvent reaction system: A novel alternative test for skin sensitization capable of assessing highly hydrophobic substances, Related Products of esters-buliding-blocks, the main research area is amino acid reactivity assay organic solvent skin sensitization; alternative to animal testing; amino acid derivative reactivity assay-organic solvent (ADRA-OS) reaction system; in chemico; octanol/water partition coefficient (logKow); skin sensitization.

The amino acid derivative reactivity assay (ADRA) is an in chemico alternative to animal testing that focuses on protein binding. The ADRA is a skin sensitization test that solves problems associated with the direct peptide reactivity assay. However, when utilizing the ADRA to evaluate highly hydrophobic substances with octanol/water partition coefficients (logKow) of >6, the test substances may not dissolve in the reaction solution, which can prevent the accurate assessment of skin sensitization. Therefore, we developed the ADRA-organic solvent (ADRA-OS) reaction system, which is a novel skin sensitization test that enables the assessment of highly hydrophobic substances with a logKow of >6. We discovered that the organic solvent ratio, the triethylamine concentration, and the EDTA disodium salt dihydrate concentration participate in reactions with the nucleophile N-(2-(1-naphthyl)acetyl)-L-cysteine (NAC) and sensitizers that are used in ADRA and in stabilizing NAC. Thus, we determined the optimal reaction composition of the ADRA-OS according to L9 (33) orthogonal array experiments Using this test, we assessed 14 types of highly hydrophobic substances. When we compared the results with ADRA, we found that ADRA-OS reaction system has high solubility for highly hydrophobic substances and that it has a high predictive capacity (sensitivity: 63%, specificity: 100%, accuracy: 79%). The implication of the results is that the novel ADRA-OS reaction system should provide a useful method for assessing the skin sensitization of highly hydrophobic substances with a logKow of >6.

Journal of Applied Toxicology published new progress about Amino acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Related Products of esters-buliding-blocks.

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

El Cadi, Hafssa published the artcileElucidation of antioxidant compounds in moroccan Chamaerops humilis L. fruits by GC-MS and HPLC-MS techniques, Recommanded Product: Ethyl pentadecanoate, the main research area is Chamaerops humilis ethyl acetate methanol water antioxidant compound; Arecaceae; antioxidant activity; liquid chromatography; polyphenols; volatile content.

The aim of this study was to characterize the phytochem. content as well as the antioxidant ability of the Moroccan species Chamaerops humilis L. Besides crude ethanolic extract, two extracts obtained by sonication using two solvents with increased polarity, namely Et acetate (EtOAc) and methanol-water (MeOH-H2O) 80:20 (volume/volume), were investigated by both spectroscopy and chromatog. methods. Between the two extracts, the MeOH-H2O one showed the highest total polyphenolic content equal to 32.7 ± 0.1 mg GAE/g DM with respect to the EtOAc extract (3.6 ± 0.5 mg GAE/g DM). Concerning the antioxidant activity of the two extracts, the EtOAc one yielded the highest value (1.9 ± 0.1 mg/mL) with respect to MeOH-H2O (0.4 ± 0.1 mg/mL). The C. humilis n-hexane fraction, analyzed by GC-MS, exhibited 69 compounds belonging to different chem. classes, with n-Hexadecanoic acid as a major compound (21.75%), whereas the polyphenolic profile, elucidated by HPLC-PDA/MS, led to the identification of a total of sixteen and thirteen different compounds in both EtOAc (major component: ferulic acid: 104.7 ± 2.52μg/g) and MeOH-H2O extracts (major component: chlorogenic acid: 45.4 ± 1.59μg/g), resp. The attained results clearly highlight the potential of C. humilis as an important source of bioactive components, making it a valuable candidate to be advantageously added to the daily diet. Furthermore, this study provides the scientific basis for the exploitation of the Doum in the food, pharmaceutical and nutraceutical industries.

Molecules published new progress about Anthocyanins Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, Recommanded Product: Ethyl pentadecanoate.

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

Zhao, Shanshan published the artcileImpact of chiral tebuconazole on the flavor components and color attributes of Merlot and Cabernet Sauvignon wines at the enantiomeric level, Synthetic Route of 41114-00-5, the main research area is tebuconazole flavor color Merlot Sauvignon wine fermentation 2heptanol; Cabernet Sauvignon wine; Chiral tebuconazole; Color attributes; Enantiomeric level; Flavor components; Merlot wine.

The impact of chiral tebuconazole on the flavor and appearance of Merlot and Cabernet Sauvignon wines were systematically studied. Gas chromatog.-ion mobility spectrometry and headspace-solid phase microextraction coupled with gas chromatog. mass spectrometry qual. and quant. identified the flavor components, and a photog. colorimeter was used for color attribute anal. Tebuconazole enantiomers had different effects on the flavor and appearance of young wines, especially R-tebuconazole. The flavor differences were mainly manifested in fruity and floral characteristics of the wine due to changes in the concentrations of acids, alcs., and esters; R-tebuconazole alters the concentrations of key flavor compounds to the greatest extent. Tebuconazole treatment changes the color of young wines, with the final red shade of wine being control group > rac-tebuconazole ≥ S-tebuconazole > R-tebuconazole. Since chiral tebuconazole neg. alters wine, grapes treated with chiral pesticides should be subject to stricter quality control during processing.

Food Chemistry 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, 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

Blackford, C. L. published the artcileExploring the influence of grape tissues on the concentration of wine volatile compounds, Synthetic Route of 41114-00-5, the main research area is volatile compound grape tissue skin seed wine flavor.

Knowledge of varietal wine flavor and aroma compounds has improved, but gaps exist concerning how grape composition impacts wine style. This work aimed to explore the influence that different grape tissues can have on the volatile profiles of wines. Riesling and Cabernet Sauvignon berries were separated into skin, flesh and seeds. Two sets of fermentations were performed using separated tissues: one using an equal mass of each tissue and another where the amount of each tissue in 25 g of berries was fermented. When an equal mass of tissue was used, the seed-derived wines had a higher concentration of esters than that produced from other grape tissues. Those produced using skins had the highest concentration of lipoxygenase pathway-derived compounds, and, for Riesling, a higher concentration of monoterpenes. When the proportional amounts of each tissue found per berry were used, the flesh-derived wines generally had a higher concentration of many wine volatiles compared to the other tissues. This reflects the greater proportion of flesh tissue in the berry compared to skin and seeds. Seed-derived compounds can enhance ester biosynthesis during fermentation and skins appear to have high lipoxygenase pathway activity. Nevertheless, the flesh makes up such a large proportion of the whole berry that it has the major influence on volatile profiles of whole berry fermentations Different berry tissues can alter wine composition in unique ways, and this can inform strategies to alter wine composition through vineyard management or the selection of new germplasm.

Australian Journal of Grape and Wine Research published new progress about Aromatic compounds Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Penrhyn-Lowe, Oliver B. published the artcileImpact of multi-vinyl taxogen dimensions on high molecular weight soluble polymer synthesis using transfer-dominated branching radical telomerisation, Application of Dodecyl 2-methylacrylate, the main research area is vinyl taxogen transfer dominated branching radical telomerisation.

Complex macromol. architectures offer innovation opportunities through the formation of new polymers with novel phys. and chem. behavior. Optimally existing com. feedstocks are used as the introduction of new small mol. chemistries may extend regulatory requirements at high expense. In a highly orthogonal synthesis strategy, we recently utilized telomerisation approaches, conventionally targeting small mol. dimerization, to generate high mol. weight branched polymers. Transfer-dominated branching radical telomerisation (TBRT) employs radical reactions, but yields branched polymers with extended backbones resembling those conventionally formed via step-growth polymerization Here we examine the impact of taxogen dimensions on the outcomes of TBRT using multi-vinyl taxogens ethylene glycol dimethacrylate (EGDMA), 1,6-hexanediol dimethacrylate (HDMA) and 1,12-dodecanediol dimethacrylate (LDMA). Marked differences in gelation behaviors were correlated to the dimensions of the taxogen, notably due to the shifting balance of intermol. and intramol. branching processes occurring during TBRT.

Polymer Chemistry published new progress about Gelation. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Application of Dodecyl 2-methylacrylate.

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

Flynn, Sean published the artcileExpanding the monomer scope of linear and branched vinyl polymerisations via copper-catalysed reversible-deactivation radical polymerisation of hydrophobic methacrylates using anhydrous alcohol solvents, Safety of Dodecyl 2-methylacrylate, the main research area is linear branched vinyl hydrophobic methacrylate alc solvent radical polymerization.

Cu-Catalyzed reversible-deactivation radical polymerization of hydrophobic methacrylate monomers in anhydrous alcs. has been expanded to explore the scope of this unusual choice of solvent. A range of linear methacrylic homopolymers with well-targeted mol. weight and low dispersity (D = 1.12-1.53) have been generated in anhydrous methanol and isopropanol with relative ease. These solvents are normally considered antisolvents and employed to precipitate such polymers; therefore, our studies have assessed the polymerization reaction mixture homogeneity and extent of reaction control. Statistical copolymerizations with the bi-functional monomer, ethylene glycol di-methacrylate (EGDMA), has led to branched statistical copolymers with weight average mol. weights up to Mw = 1.76 × 106 g mol-1; subsequent triple-detection size exclusion chromatog. studies have provided insight into the impact of monomer structure on the extent of branching within the final isolated polymers. The ability to control branched copolymer mol. weights under these conditions through variation of EGDMA concentrations was seen to be highly dependent on methacrylate monomer chem. A number of factors which are likely to effect branching reactions during the polymerization of hydrophobic methacrylates in anhydrous alcs. are discussed.

Polymer Chemistry published new progress about Homogeneity. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Safety of Dodecyl 2-methylacrylate.

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

Peng, Hui published the artcileCotton Fabric-Supported Cationic Acrylate Polymer as an Efficient and Recyclable Catalyst for Williamson Ether Synthesis Reaction in Solid-Liquid-Liquid Phase Transfer Catalysis System, Computed Properties of 142-90-5, the main research area is cotton fabric supported cationic acrylate polymer recyclable catalyst Williamson.

Cotton-based catalytic fabric (CCF) was prepared by the simple padding-drying method with the copolymer of five functional monomers as the modifier and was applied in the solid-liquid-liquid phase-transfer catalysis (SLL-PTC) system. Effects of the structure of the function monomer, the content of the cation, and the loading amount on the catalytic activity of CCF were studied. The lipophilicity, disperse extent of cationic center, and the accessory to the ion for CCF were influenced by the structure and content of the function monomer. The organic phase was adsorbed on the surface of the catalytic fabric, and the novel catalytic cycle in the PTC system was initiated. The anion in the aqueous phase diffuses through the interfacial region to the site for ion exchange. Bond-forming reaction was initiated in the interfacial region between the organic phase on the fabric and the aqueous phase. The conversion rate for Williamson ether synthesis reaction reached 92%, and CCF could be reused five times in this SLL-PTC system.

ACS Omega published new progress about Cotton textiles. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Computed Properties of 142-90-5.

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