Tag: M.W=250-300

Ueki, Atsuko; Tonouchi, Akio; Kaku, Nobuo; Ueki, Katsuji published the artcile< Prevotella herbatica sp. nov., a plant polysaccharide-decomposing anaerobic bacterium isolated from a methanogenic reactor>, Computed Properties of 112-63-0, the main research area is sequence Prevotella malate biomass phylogeny methanogenic reactor; Prevotella; anaerobic Gram-negative rods; fumarate respiration; inulin decomposition; succinate.

An obligately anaerobic bacterial strain (WR041T) was isolated from a plant residue sample in a methanogenic reactor. Cells of the strain were Gram-stain-neg., non-motile, non-spore-forming rods. Prevotella paludivivens JCM 13650T was the closest species of the strain based on 16S rRNA gene sequencing (98.9 % similarity). Genome anal. of strain WR041T indicated that the genome size of the strain was 3.52 Mb and the genomic DNA G + C content was 37.5 mol%. Although the 16S rRNA gene sequence similarity of strain WR041T with the closest species was higher than the threshold value of the recommended species delineation (98.7 %), the average nucleotide identity and the digital DNA-DNA hybridization value between them were 91-92 and 45.5 %, resp., suggesting that strain WR041T represents a novel species in the genus. Strain WR041T essentially required hemin and CO2/Na2CO3 for growth. The strain was saccharolytic and decomposed various polysaccharides (glucomannan, inulin, laminarin, pectin, starch and xylan) and produced acetate and succinate. The optimum growth conditions were 35 鎺矯 and pH 6.8. The major cellular fatty acids were branched-chain fatty acids such as anteiso-C15 : 0 and iso-C15 : 0. Menaquinones MK-11 and MK-12 were the major respiratory quinones. Many protein-coding genes which were not found in the genome of P. paludivivens as orthologous genes were detected in the genome of strain WR041T. Based on the differences in the phylogenetic, genomic and physiol. characteristics between strain WR041T and related species, the name Prevotella herbatica sp. nov. is proposed to accommodate strain WR041T (=NBRC 115134T = DSM 112534T). The 16S rRNA gene sequence and the whole genome sequence of strain WR041T have been deposited in the DDBJ/EMBL/GenBank under accession numbers AB298732 and AP024484, resp.

International Journal of Systematic and Evolutionary Microbiology published new progress about 16S rRNA Role: BUU (Biological Use, Unclassified), BIOL (Biological Study), USES (Uses). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.

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

Wilchek, Meir; Bayer, Edward A. published the artcile< Biotin-containing reagents>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is biotin containing reagent preparation.

The authors describe the synthesis of many of the biotin-containing reagents, the original description and/or syntheses of which originated in the authors’ laboratory

Methods in Enzymology published new progress about 112-63-0. 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

Alvarez Tirado, Marta; Castro, Laurent; Guzman-Gonzalez, Gregorio; Porcarelli, Luca; Mecerreyes, David published the artcile< Single- Versus Dual-Ion UV-Cross-Linked Gel Polymer Electrolytes for Li-O2 Batteries>, Quality Control of 112-63-0, the main research area is solid electrolyte lithium oxygen battery polymer electrolyte single ion.

Lithium-O2 batteries represent one of the most appealing candidates for battery elec. vehicles because of their remarkable theor. high energy d., similar to fossil fuels. Solid polymer electrolytes represent a plausible solution to tackle some of the challenges associated with conventional liquid-based Li-O2 batteries, including safety concerns. Herein, cross-linked robust gel polymer electrolytes (GPEs) based on poly(ethylene glycol) dimethacrylate and tetraethylene glycol di-Me ether as a plasticizer are prepared by rapid UV-photopolymerization Both types of robust GPEs presented high ionic conductivity at room temperature (1.6 x 10-4 and 1.4 x 10-3 S璺痗m-1 for single ion or dual ion, resp.). Both types of GPEs, single-ion and dual-ion lithium conductors, have been compared for the first time on Li-O2 cells. First, their performance was investigated in sym. Li|Li cells. In this case, the dual-ion GPE showed outstanding behavior where the overpotential was <0.2 V vs. Li0/Li+ for more than 40 h at a c.d. as high as é? mA璺痗m-2. On the other hand, in the full Li-O2 configuration, the single-ion GPE cell showed superior discharge capacity, up to 2.38 mA璺痟璺痗m-2. Here, a dynamic discharge characterization technique is proposed as a method for evaluating the polarization effect in electrolytes during discharge in an easy, quantifiable, and reproducible manner. ACS Applied Energy Materials published new progress about Photopolymerization. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

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

Liu, Yang; Zhang, Zetian; Liang, Ze; Yong, Yong; Yang, Changkai; Li, Zhengjun published the artcile< Multifunctional polyurethane hydrogel based on a phenol-carbamate network and an Fe3+-polyphenol coordination bond toward NIR light triggered actuators and strain sensors>, Synthetic Route of 112-63-0, the main research area is polyurethane hydrogel NIR light triggered actuator strain sensor.

Multifunctional smart hydrogels have been extensively used in wearable devices, soft robotics, tissue engineering, and information storage, especially those with good mech. properties, desired stimuli-responsiveness, high strain sensitivity, and recyclability. Herein, a novel synergistic dual-network polyurethane hydrogel was prepared through two steps, i.e., tannic acid (TA) was firstly incorporated into a polyurethane backbone comprising thermosensitive polyethylene glycol/polypropylene glycol (PEG/PPG) blocks to obtain TA-based polyurethane (TAPU) bearing a phenol-carbamate network; subsequently, TAPU film was immersed in FeCl3 aqueous solution to obtain a TAPU/Fe hydrogel bearing an Fe3+-polyphenol network. The prepared TAPU/Fe hydrogel exhibited a high tensile strength of 0.75 MPa, and large elongation at break of 550%. Benefiting from the thermosensitivity of PEG/PPG blocks and the photothermal effect of the Fe3+/TA complex, the TAPU/Fe hydrogel showed ideal near-IR (NIR) light triggered actuating behavior and photothermal stability. Under the irradiation of NIR light, the flower-shaped hydrogel actuator can bend upward vertical to the horizontal plane within 2 min. Furthermore, Fe3+ incorporated into the hydrogel matrix can endow the TAPU/Fe hydrogel sensor with high strain sensitivity, which can be used for real-time, stable and repeated monitoring of human movement, and can also be designed as a light-driven switch to light an LED bulb. Built on the reversible cross-linked networks, the TAPU/Fe hydrogel with good biocompatibility can be recycled. Unexpectedly, the TAPU hydrogel showed blue fluorescence under UV light (365 nm) irradiation, and the fluorescence could be quenched (with Cu2+) and recovered (with EDTA), resembling rewritable papers.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about Actuators. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Synthetic Route of 112-63-0.

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

Maertens, Christophe; Zhang, Jian-Xin; Dubois, Philippe; Jerome, Robert published the artcile< Synthesis and characterization of end-functionalized oligo(vinylthiophenes) with liquid crystal properties>, Application In Synthesis of 112-63-0, the main research area is end functionalized vinylthiophene liquid crystal property.

A general scheme for the synthesis of end-functionalized conjugated (E)-vinylthiophene oligomers with liquid crystal and potential 2nd-order nonlinear optical properties is described. These push-pull thiophene-containing aromatic mols. show mesogenic properties over different temperature ranges depending on the chain length and the functional end-groups.

Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry published new progress about Liquid crystals. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application In Synthesis of 112-63-0.

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

Cheryl-Low, Y. L.; Kong, Pei San; Lee, Hwei Voon published the artcile< Environmentally adapted bio-oil compounds-derived polyolesters synthesis: Optimization and properties of base fluids>, SDS of cas: 112-63-0, the main research area is polyolester biooil base fluid esterification reusability; Bioenergy; Biomass; Brown algae alginate; Esterification; Viscosity index.

Non-edible bio-oil derived from lignocellulosic biomass could be used as environmentally friendly lubricant-ester base stock for maritime and road-type transportations. However, the use of crude bio-oil with highly oxygenated compounds required further upgrading to yield ester that mimicked the characteristics of Group V base oil (polyolesters). In this study, bio-oil based polyolesters was produced via esterification using green biopolymer alginate acid catalyst (Al-Alg). The bio-oil compounds used were acetic acid (AcA), propionic acid (PrA) and levulinic acid (LA), while polyols such as neopentyl glycol (NPG), trimethylolpropane (TMP) and pentaerythritol (PE) were used. Optimization studies revealed that NPG-PrA ester gave the best ester purity of 100%, with 95% of diester selectivity under optimum conditions of 15 wt% Al-Alg, 8 h, 6:1 PrA:NPG and 140鎺矯. The produced polyolesters showed potential lube characteristics with viscosity index of 76, kinematic viscosity of 2.3 mm2 s-1 at 40鎺矯 and oxidative induction time of 15 min at 100鎺矯. Furthermore, a reusability study of the Al-Alg catalyst indicated high NPG-PrA diester selectivity (above 90%) for 8 consecutive cycles. The physico-chem. properties of spent Al-Alg catalyst were also discussed.

Journal of Hazardous Materials published new progress about Biomass (lignocellulosic). 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

Sibbesen, Ole; Zhang, Zhoupeng; Ortiz de Montellano, Paul R. published the artcile< Cytochrome P450cam substrate specificity: relationship between structure and catalytic oxidation of alkylbenzenes>, Related Products of 112-63-0, the main research area is cytochrome P450cam specificity alkylbenzene structure; P 450cam specificity alkylbenzene structure.

The oxidation by cytochrome P 450cam (CYP101) of ethylbenzene and a series of substrates derived from it by addition of one, two, three, or four carbon atoms has been examined For each of the 18 substrates, the shift in spin state due to substrate binding, the extent of coupled turnover to give organic products and uncoupled turnover to give H2O2 and H2O, and the identities of the organic products have been determined The same studies have been carried out with the T185L and T185F mutants of P 450cam in which the active site volume is decreased. The results show that no detectable correlation exists between the observed spin state change and any other parameter studied. For substrates of equal size, coupled and uncoupled turnover vary widely but both are maximized when the Ph ring bears one large alkyl substituent or a Me ortho to the largest alkyl substituent. The presence of substituents in addition to these decreases activity. In the absence of other changes, coupled turnover is correlated with the size of the largest substituent, but no such correlation exists for uncoupled turnover. Decreasing the size of the active site cavity by a T185L mutation generally increases coupled turnover without altering the dependence on the alkyl group size. A T185F mutation causes too great an active site perturbation for structure-activity studies. Substrate oxidation occurs preferentially at 2鎺?or 3鎺?C-H bonds of the largest substituent or on the benzylic Me ortho to it. Aromatic hydroxylation only competes with the oxidation of nonbenzylic 1鎺?C-H bonds. The extent of coupled turnover is a function of substrate shape, substrate size, and cavity size, but still elusive parameters control the extent of uncoupled turnover.

Archives of Biochemistry and Biophysics published new progress about Enzyme functional sites, active. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Related Products of 112-63-0.

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

Buyukyonga, Ozge Naz; Akgun, Nagihan; Acar, Isil; Guclu, Gamze published the artcile< The usage of novel acrylic-modified water-reducible alkyd resin obtained from post-consumer PET bottles in water-based paint formulation>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is acrylic modified alkyd resin preparation water based paint property.

Glycolysis reactions of waste polyethylene terephthalate (PET) flakes obtained from post-consumer water bottles were carried out at 220-250鎺矯 using diethylene glycol, dipropylene glycol and triethylene glycol, and molar ratios of PET/glycol in the glycolysis reactions were chosen to be 1/3. The obtained glycolysis products were used in the synthesis of medium-oil acrylic-modified water-reducible alkyd resins. Acrylic modification was carried out using methacrylic acid-maleic acid copolymer synthesized in our laboratory The structure of the acrylic copolymer was investigated with FTIR anal. Films of the modified alkyd resins were prepared and their phys. and chem. surface coating properties were investigated. When surface coating test results were evaluated, it was observed that waste PET had no adverse effect on these properties of acrylic-modified water-reducible alkyd resins. Then, two water-based paints were prepared using PET-based acrylic-modified water-reducible alkyd resin and reference acrylic-modified water-reducible alkyd resin as binder. Wet paint properties and phys./chem. dry film properties of paints were determined When the phys. surface coating test results were evaluated, no difference was observed between the properties of both paints. If we evaluate the results of chem. surface coating properties, the hot water and alkali resistance of waste PET-based paint was considerably higher than the reference resin.

Journal of Material Cycles and Waste Management published new progress about Abrasion resistance. 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

Jia, Xiaozhou; Liang, Yueyi; Chen, Fang; Liu, Xiaoxia; Wei, Cuijie; Ding, Qing; Chen, Xiangdong; Sun, Dongmei; Wei, Mei published the artcile< HPLC-PDA combined with chemometrics for chemical markers of Paeoniae Radix Alba before and after sulfur-fumigated>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is Paeonia catechin albiflorin sulfur fumigation HPLC PDA chemometrics.

To quant. compare the chem. composition of Paeoniae Radix Alba before and after sulfur-fumigated by using HPLC fingerprint and chemometrics, to provide a reference for the quality evaluation of Paeoniae Radix Alba. Establish the fingerprints of 9 batches of white peony and its sulfur-fumigated products, combined with orthogonal partial least squares-discriminant anal. (PLS-DA) to compare the composition differences of white peony before and after sulfur-fumigation. For the quant. anal. of sexual components, differential compounds were identified by UPLC-MS. The contents of gallic acid, catechins, albiflorin, paeoniflorin, 1,2,3,4,6-pentagalloyl glucose and benzoylpaeoniflorin before and after sulfur-fumigation Paeoniae Radix Alba were determined, and there were 6 common peaks in the HPLC fingerprints of Paeoniae Radix Alba before and after sulfur-fumigated. There were 6 common peaks in Paeoniae Radix Alba without sulfur-fumigated, and 7 peaks after sulfur-fumigated. The differential compound (peak 7) was proven to be paeoniflorin sulfite. The differential compound was proven to be paeoniflorin sulfite. This method can be used for fingerprint anal. and quant. anal. of different components of Paeoniae Radix Alba and sulfur-fumigated Paeoniae Radix Alba, and can distinguish Paeoniae Radix Alba from sulfur-fumigated Paeoniae Radix Alba.

Results in Chemistry published new progress about Chemometrics. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Armbruster, Michael R.; Grady, Scott F.; Arnatt, Christopher K.; Edwards, James L. published the artcile< Isobaric 4-Plex Tagging for Absolute Quantitation of Biological Acids in Diabetic Urine Using Capillary LC-MS/MS>, Formula: C19H34O2, the main research area is diabetes urine isobaric plex tagging biol acid LC MS.

Isobaric labeling in mass spectrometry enables multiplexed absolute quantitation and high throughput, while minimizing full scan spectral complexity. Here, we use 4-plex isobaric labeling with a fixed pos. charge tag to improve quantitation and throughput for polar carboxylic acid metabolites. The isobaric tag uses an isotope-encoded neutral loss to create mass-dependent reporters spaced 2 Da apart and was validated for both single- and double-tagged analytes. Tags were synthesized inhouse using deuterated formaldehyde and Me iodide in a total of four steps, producing cost-effective multiplexing. No chromatog. deuterium shifts were observed for single- or double-tagged analytes, producing consistent reporter ratios across each peak. Perfluoropentanoic acid was added to the sample to drastically increase retention of double-tagged analytes on a C18 column. Excess tag was scavenged and extracted using hexadecyl chloroformate after reaction completion. This allowed for removal of excess tag that typically causes ion suppression and column overloading. A total of 54 organic acids were investigated, producing an average linearity of 0.993, retention time relative standard deviation (RSD) of 0.58%, and intensity RSD of 12.1%. This method was used for absolute quantitation of acid metabolites comparing control and type 1 diabetic urine. Absolute quantitation of organic acids was achieved by using one isobaric lane for standards, thereby allowing for anal. of six urine samples in two injections. Quantified acids showed good agreement with previous work, and six significant changes were found. Overall, this method demonstrated 4-plex absolute quantitation of acids in a complex biol. sample.

ACS Measurement Science Au published new progress about Acids Role: BUU (Biological Use, Unclassified), BIOL (Biological Study), USES (Uses). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

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