Category: 112-63-0

Shahedi, Mansour; Habibi, Zohreh; Yousefi, Maryam; Brask, Jesper; Mohammadi, Mehdi published the artcile< Improvement of biodiesel production from palm oil by co-immobilization of Thermomyces lanuginosa lipase and Candida antarctica lipase B: Optimization using response surface methodology>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is Thermomyces lanuginose Candida antarctica lipase biodiesel response surface methodol; Biodiesel; Co-immobilization; Enzyme; Lipase; Multicomponent reactions.

Candida antarctica lipase B (CALB) and Thermomyces lanuginose lipase (TLL) were co-immobilized on epoxy functionalized silica gel via an isocyanide-based multicomponent reaction. The immobilization process was carried out in water (pH 7) at 25°, rapidly (3 h) resulting in high immobilization yields (100%) with a loading of 10 mg enzyme/g support. The immobilized preparations were used to produce biodiesel by transesterification of palm oil. In an optimization study, response surface methodol. (RSM) and central composite rotatable design (CCRD) methods were used to study the effect of five independent factors including temperature, methanol to oil ratio, t-butanol concentration and CALB:TLL ratio on the yield of biodiesel production The optimum combinations for the reaction were CALB:TLL ratio (2.1:1), t-butanol (45 wt%), temperature (47°), methanol:oil ratio (2.3). This resulted in a FAME yield of 94%, very close to the predicted value of 98%.

International Journal of Biological Macromolecules published new progress about Biodiesel fuel. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Lei, Beilei; Li, Jiazhong; Liu, Huanxiang; Yao, Xiaojun published the artcile< Accurate prediction of aquatic toxicity of aromatic compounds based on genetic algorithm and least squares support vector machines>, Product Details of C19H34O2, the main research area is aquatic toxicity aromatic compound genetic algorithm statistics.

Quant. Structure – Toxicity Relationship (QSTR) plays an important role in ecotoxicol. for its fast and practical ability to assess the potential neg. effects of chems. The aim of this investigation was to develop accurate QSTR models for the aquatic toxicity of a large set of aromatic compounds through the combination of Least Squares Support Vector Machines (LS-SVMs) and a Genetic Algorithm (GA). Mol. descriptors calculated by DRAGON package and log P were used to describe the mol. structures. The most relevant descriptors used to build QSTR models were selected by a GA-Variable Subset Selection procedure. Multiple Linear Regression (MLR) and nonlinear LS-SVMs methods were employed to build QSTR models. The predictive ability of the derived models was validated using both the test set, selected from the whole data set by the Kennard – Stone Algorithm, and an external prediction set. The model applicability domain was checked by the leverage approach and the external prediction set was used to verify the predictive reliability of the models. The results indicated that the proposed QSTR models are robust and satisfactory, and can provide a feasible and promising tool for the rapid assessment of the toxicity of chems.

QSAR & Combinatorial Science published new progress about Aquatic toxicity. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Product Details of C19H34O2.

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

Hass, Daniel T.; Bisbach, Celia M.; Robbings, Brian M.; Sadilek, Martin; Sweet, Ian R.; Hurley, James B. published the artcile< Succinate metabolism in the retinal pigment epithelium uncouples respiration from ATP synthesis>, Electric Literature of 112-63-0, the main research area is retinal pigment epithelium respiration ATP synthesis succinate metabolism; CP: metabolism; anion transport; cell metabolism; energy metabolism; mitochondrial respiratory chain; retinal metabolism; retinal pigment epithelium; succinate; uncoupling.

Fumarate can be a surrogate for O2 as a terminal electron acceptor in the electron transport chain. Reduction of fumarate produces succinate, which can be exported. It is debated whether intact tissues can import and oxidize succinate produced by other tissues. In a previous report, we showed that mitochondria in retinal pigment epithelium (RPE)-choroid preparations can use succinate to reduce O2 to H2O. However, cells in that preparation could have been disrupted during tissue isolation. We now use multiple strategies to quantify intactness of the isolated RPE-choroid tissue. We find that exogenous 13C4-succinate is oxidized by intact cells then exported as fumarate or malate. Unexpectedly, we also find that oxidation of succinate is different from oxidation of other substrates because it uncouples electron transport from ATP synthesis. Retinas produce and export succinate. Our findings imply that retina succinate may substantially increase O2 consumption by uncoupling adjacent RPE mitochondria.

Cell Reports published new progress about Choroid. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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

Wang, Na; Chen, Shuang; Zhou, Zhemin published the artcile< Age-dependent characterization of volatile organic compounds and age discrimination in Chinese rice wine using an untargeted GC/MS-based metabolomic approach>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is rice wine aging volatile organic compound metabolomics GC MS; 2,3,5,6-Tetramethylpyrazine (PubChem CID: 14296); 2-Phenylbut-2-enal (PubChem CID: 6429333); 3-Methylbutanoic acid (PubChem CID: 10430); 3-Methylbutanol (PubChem CID: 31260); 3-Methylthiopropanol (PubChem CID: 10448); Acetophenone (PubChem CID: 7410); Age discrimination; Chinese rice wine; Ethyl 3-methylbutanoate (PubChem CID: 7945); Furfural (PubChem CID: 7362); Gas chromatography/mass spectrometry (GC/MS); Guaiacol (PubChem CID: 460); Metabolomics; Partial least squares regression (PLSR); Volatile organic compounds (VOCs); γ-Nonalactone (PubChem CID: 7710).

An untargeted gas chromatog./mass spectrometry (GC/MS)-based metabolomics by XCMS-Online software combined with partial least squares regression (PLSR) was applied to characterize volatile organic compounds (VOCs) during Chinese rice wine aging and discriminate ages for the first time. Finally, seven different ages between 0 and 15 years were well discriminated by PLSR. Total 104 feature groups were isolated from all optimized candidate peaks, and 94 VOCs (including unknowns) were preliminarily identified as aging markers. Therein, alcs., sulfides, phenols and their derivatives, small esters and acids exhibited significantly better discrimination of short-aged rice wines. Correspondingly, furans, aromatics, aldehydes, ketones, most esters and acids, discriminated the long-aged samples better. Meanwhile, the potential origins of certain VOCs were also proposed for further research. Overall, this untargeted GC/MS-based metabolomics coupled with PLSR was a feasible tool for a rapidly and globally age-dependent characterization of volatile metabolomic signals in Chinese rice wine and thus for age discrimination.

Food Chemistry published new progress about Acids Role: ANT (Analyte), ANST (Analytical Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Zhang, Shan-Jun; Cui, Hai-Lei; Jiang, Kun; Li, Rui; Ding, Zhen-Yu; Chen, Ying-Chun published the artcile< Enantioselective Allylic Amination of Morita-Baylis-Hillman Carbonates Catalysed by Modified Cinchona Alkaloids>, COA of Formula: C19H34O2, the main research area is ester unsaturated imido asym synthesis; carbonate ester unsaturated enantioselective allylic amination cyclic imide cinchona.

An efficient procedure for the asym. allylic amination of Morita-Baylis-Hillman carbonates I (R = Ph, 2-ClC6H4, 3-MeC6H4, 1-naphthyl, 2-thienyl, etc.) with cyclic imides II (phthalimide, tetrachlorophthalimide, tetrabromophthalimide, cis-hexahydrophthalimide, 1,8-naphthalimide) catalyzed by com. available cinchona alkaloids is reported. It proves to be a facile protocol that affords α-methylene-β-imido esters III with good-to-excellent enantioselectivities (up to 94 % ee) and in high yields (up to 97 %). (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009).

European Journal of Organic Chemistry published new progress about Allylic substitution reaction (stereoselective). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

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

Phukan, Kandarpa; Chutia, Gobinda Prasad; Chutia, Sudipta published the artcile< Synthesis of Biodiesel from Indigenous Xanthium Strumarium (Cocklebur) Non-Edible Oil Available in Assam, India>, Electric Literature of 112-63-0, the main research area is Xanthium strumarium biodesel synthesis transesterification.

Xanthium strumarium seed oils had been investigated as a potential non-edible biodiesel feedstock. The Xanthium strumarium seeds expressed about 38% oil content via solvent extracton technique. Physicochem. parameters of oil such as acid value, iodine value, saponification value, etc. were determined exptl. to prove its feasibility for biodiesel production The Xanthium strumarium Me esters or biodiesel were synthesized via transesterification reaction using K2CO3 as a catalyst and a 97% yield was attained at optimum reaction parameters. The characterization of produced biodiesel was done by fourier transform IR (FTIR), proton NMR (1H NMR) and carbon-13 NMR (13C NMR) spectroscopy. Gas chromatog.-mass spectrometry (GC-MS) anal. was employed to determine the composition of fatty acid Me esters of methylated oil. The fuel parameters like d., viscosity, acid value, calorific value, flash point, pour and cloud point of the biodiesel were evaluated as per American Society for Testing and Materials (ASTM) D6751 standard

ChemistrySelect published new progress about Acid number. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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

Li, Rui-Qi; Huang, Tao; Gong, Shu-Ling published the artcile< Preparation of high hydroxyl self-emulsifying polyester and compounding with acrylate>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is hydroxyl polyester acrylate emulsion film waterborne coating.

Waterborne saturated polyester (WSP) with high hydroxyl content was prepared through solution polymerization by using stepwise feeding and stage heating methods. The stability of polyester dispersion was enhanced via control of the mol. structure and polymerization process. The effect of polymerization conditions, monomer types, and catalyst types was determined The effects of the alc.-to-acid ratio, trimethylolpropane content, the feeding method, the content of terminal monomer and branching monomer on the dispersion were investigated. The stability of the self-emulsifying polyester and water resistance of the film were excellent. The transesterification of WSP afforded waterborne unsaturated polyester. Polyester-acrylate composite emulsion was prepared by phys. blending or copolymerization with unsaturated polyester. The viscosity of the composite emulsion, hardness and water resistance were improved. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48278.

Journal of Applied Polymer Science published new progress about Acid number. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Parida, Chandrakanta; Maity, Rajendra; Chandra Sahoo, Subas; Chandra Pan, Subhas published the artcile< α-Nitro-α,β-Unsaturated Ketones: An Electrophilic Acyl Transfer Reagent in Catalytic Asymmetric Friedel-Crafts and Michael Reactions>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is nitroethylnaphthyl ester enantioselective preparation; nitroethyl substituted enol ester enantioselective preparation; squaramide catalyst enantioselective tandem Friedel Crafts acyl transfer reaction; nitroenone acyl transfer reagent enantioselective reaction naphthol phenol.

In the presence of a tert-leucine-derived squaramide and mol. sieves, 2-naphthols and electron-rich phenols underwent tandem enantioselective Friedel-Crafts and acyl transfer reactions with α-nitro-α,β-unsaturated ketones such as I (R = Ph, 4-i-PrC6H4, 4-PhOC6H4, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 4-PhC6H4, 3-BrC6H4, 2,4-Me2C6H3, 2-naphthyl, cyclohexyl, i-Pr; R1 = Ph, 4-MeC6H4, 4-MeOC6H4, 4-ClC6H4, 4-BrC6H4, 4-O2NC6H4, 3-ClC6H4, 3-F3CC6H4, 2-FC6H4, 2-ClC6H4, 2-Br-4-MeC6H3, 2-furyl) to yield nitroethylnaphthol ester such as II (R = Ph, 4-i-PrC6H4, 4-PhOC6H4, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 4-PhC6H4, 3-BrC6H4, 2,4-Me2C6H3, 2-naphthyl, cyclohexyl, i-Pr; R1 = Ph, 4-MeC6H4, 4-MeOC6H4, 4-ClC6H4, 4-BrC6H4, 4-O2NC6H4, 3-ClC6H4, 3-F3CC6H4, 2-FC6H4, 2-ClC6H4, 2-Br-4-MeC6H3, 2-furyl). Dimedone and a pyrazolone underwent tandem enantioselective Michael and acyl transfer reactions with I (R = R1 = Ph) to yield nitroethyl-substituted enol esters. Further reactions of II (R = R1 = Ph) are disclosed.

Organic Letters published new progress about Alkenes, nitro Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (α-acyl). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Santi, D.; Triyono; Morin, J. V. published the artcile< The preparation of Merbau wood waste ash-based catalyst and its utilization for biodiesel production from low-grade palm oil>, SDS of cas: 112-63-0, the main research area is Merbau wood waste ash catalyst palm oil biodiesel production.

The Merbau wood waste ash-based catalyst was prepared via various calcination temperatures and was applied for biodiesel production from low-grade palm oil. The thermal investigations of calcination of Merbau wood were carried out at temperatures of 500, 600, 700, 800, and 900°C for 3 h. It was led to M700 as a catalyst based on the highest basicity as confirmed by the basicity test and x-ray diffraction anal. The M700 mass toward methanol volume ratio was performed at 5%, 10%, 15%, 20% (w/v) on the application of conversion of LGPO into biodiesel. The products of biodiesel were prepared via reflux at temperature 80°C for 2 h and were characterized by GC-MS. The biodiesel product is predominantly Me palmitate. The ash-methanol ratio of 15% gives the optimum biodiesel fraction conversion (78.7% weight/weight). The optimum selectivity of the yield total of biodiesel given by 10%, namely 48.9% weight/weight, resulted in Me ester (biodiesel) with C15-C19 consisting of Me myristate, Me palmitate, Me linoleate, Me oleic, Me stearate. Moreover, a 10% weight catalyst to methanol showed the optimum decrease of FFA (89.0 ± 0.6%).

Rasayan Journal of Chemistry published new progress about Basicity. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, SDS of cas: 112-63-0.

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

Ma, Jin-ling; Zhang, Wen-chao; Wang, Xiao-dong; Tang, Ming; Huang, Zheng-yong; Li, Jian; Zhang, Han; Yang, Xiao-hui; Guo, Zai-ping; Wang, Yu published the artcile< Revealing the mechanism of saturated ether electrolyte for improving the long-cycling stability of Na-O2 batteries>, HPLC of Formula: 112-63-0, the main research area is sodium oxygen battery saturated ether electrolyte stability revealing mechanism.

Na-O2 batteries have been considered as promising energy storage systems due to their high energy d. and low cost. Their poor cycle life, however, and their unclear interfacial formation mechanisms have greatly hindered the development of Na-O2 batteries. In this work, compared to the commonly used ether-based electrolyte (0.5 M sodium trifluomethanesulfonate in tetraethylene glycol di-Me ether), its saturated electrolyte is employed for Na-O2 batteries to achieve around four times longer cycle life. Both experiments and simulations suggest that the enhanced cycling stability could be attributed to the use of saturated electrolyte, which plays important roles in reducing the dissolution of NaO2, thereby easing the shuttle effect of O2-; sharply decreasing dissolved oxygen, thus eliminating Na anode oxidation; and effectively suppressing Na dendrite growth because of the high Na+ flux in saturated electrolyte, thus relieving the nonuniformity of the Na+ flux.

Nano Energy published new progress about Absorption. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

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