Tag: M.W=250-300

Song, Jianling; Zou, Xiaoyan; Liu, Pandao; Cardoso, Juan Andres; Schultze-Kraft, Rainer; Liu, Guodao; Luo, Lijuan; Chen, Zhijian published the artcile< Differential expressions and enzymatic properties of malate dehydrogenases in response to nutrient and metal stresses in Stylosanthes guianensis>, Reference of 112-63-0, the main research area is Stylosanthes malate dehydrogenase nutrient metal stress; Enzymatic properties; Gene expression; Malate; Malate dehydrogenase; Metal stress; Nutrient deficiency; Stylosanthes guianensis.

Malate dehydrogenase (MDH, EC 1.1.1.37) is a key enzyme that catalyzes a reversible NAD-dependent dehydrogenase reaction from oxaloacetate (OAA) to malate. Although MDH has been documented to participate in cellular metabolism and redox homeostasis in plants, the roles of MDH members in the tropical legume Stylosanthes guianensis (stylo) remain less definitive. In this study, except SgMDH1 that had been previously characterized, six novel MDH genes were isolated from stylo and were then designated as SgMDH2 to SgMDH7. All of the SgMDH proteins possessed the common features of NAD binding, dimerization interface and substrate binding sites. Expression anal. showed that three SgMDHs exhibited preferential expressions in leaves, and one SgMDH was mainly expressed in roots. Furthermore, SgMDHs were regulated by nutrient deficiencies in stylo roots, especially for phosphorus (-P) and potassium (-K) deficiencies. Differential responses of SgMDHs to trace metal stress and heavy metal toxicity were observed in stylo roots, suggesting the involvement of SgMDHs in the response of stylo to metal stresses. The six novel SgMDHs were subsequently expressed and purified from Escherichia coli to analyze their biochem. properties. Although SgMDHs exhibited variations in subcellular localizations, each SgMDH protein displayed a high level of catalytic efficiency towards OAA and NADH but a low level of catalytic efficiency towards malate and NAD+. In addition, the activities of recombinant SgMDH proteins were pH-dependent and temperature-sensitive, and exhibited differential regulations by various metal ions. These results together suggest the potential roles of SgMDHs in stylo coping with nutrient and metal stresses. The sequence data of the six novel SgMDHs were deposited in GenBank under accession numbers OK188912, OK188913, OK188914, OK188915, OK188916 and OK188917 for SgMDH2 to SgMDH7, resp.

Plant Physiology and Biochemistry (Issy-les-Moulineaux, France) published new progress about Chlorophylls Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

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

Qiu, Di; Zhang, Yan; Wang, Jianbo published the artcile< Direct synthesis of arylboronic pinacol esters from arylamines>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is pinacol arylboronate aryloxaborolane preparation metal free arylamine borylation.

A metal-free synthetic method based on Sandmeyer-type transformation for preparation of arylboronic pinacol esters from easily available aromatic amines as starting materials was described. This novel transformation affords borylation products in good yields under mild reaction conditions. This strategy can be easily carried out in gram-scale, demonstrating the practical usefulness of the method. Moreover, the Sandmeyer-type transformation can be followed by Suzuki-Miyaura cross-coupling reaction without purification of the arylboronate products.

Organic Chemistry Frontiers published new progress about Aromatic amines Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Piesche, L.; Hilse, H.; Oehlke, J.; Schroetter, E.; Oehme, P. published the artcile< Substituted picolinic acids as DBH [dopamine β-hydroxylase] inhibitors. Inhibition of dopamine β-hydroxylase and antihypertensive effect>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is picolinate derivative antihypertensive dopamine hydroxylase; fusarate derivative antihypertensive dopamine hydroxylase; copper complexing picolinate derivative antihypertensive.

Twenty-seven substituted picolinic acids and fusaric acids (I and II, resp.; R = various small groups, as well as halogen) were characterized as weak-to-moderately strong acids which form stable Cu(II) complexes in solution and in the solid state. The concentrations required for 50% inhibition of purified bovine adrenal dopamine β-hydroxylase  [9013-38-1] were 10-6-10-5M; I were stronger inhibitors than II. The inhibition was noncompetitive with respect to tyramine but was transitional between competitive and noncompetitive with respect to ascorbic acid. The mechanism of enzyme inhibition could not be explained solely by a complexing of the enzyme Cu. Most I and II had antihypertensive activity in spontaneously hypertensive rats, but some further increased the blood pressure. No correlation was observed between antihypertensive activity and dopamine β-hydroxylase inhibition.

Pharmazie published new progress about Antihypertensives. 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

Kisszekelyi, Peter; Alammar, Abdulaziz; Kupai, Jozsef; Huszthy, Peter; Barabas, Julia; Holtzl, Tibor; Szente, Lajos; Bawn, Carlo; Adams, Ralph; Szekely, Gyorgy published the artcile< Asymmetric synthesis with cinchona-decorated cyclodextrin in a continuous-flow membrane reactor>, Category: esters-buliding-blocks, the main research area is cinchona cyclodextrin organocatalyst synthesis asym Michael diketone nitrostyrene; synthesis separation integrated flow reactor cinchona cyclodextrin Michael organocatalyst.

This work presents a cyclodextrin-enhanced organocatalytic method from mol. to process design. Cinchona-thiourea and -squaramide catalysts were covalently anchored to inherently large, stable and well-defined permethyl-β-cyclodextrins. The asym. catalysis was successfully demonstrated on the Michael reaction of 1,3-diketones and trans-β-nitrostyrene. Both emerging green and conventional solvents were screened for the asym. addition (up to 99% ee), and the Kamlet-Taft solvent parameters were correlated to the enantioselectivity. Quantum chem. modeling revealed that the catalyst anchoring resulted in favorable structural changes, and stronger intermol. interactions between the catalyst and the reagents. Continuous organocatalysis was performed in coiled tube flow reactor coupled with a membrane separation unit, which allowed complete recovery of the catalyst and 50% solvent (2-MeTHF) recycling. The 100% conversion, 98% purity, 99% ee, 100% in-line catalyst recovery, and 80 g L-1 h-1 productivity makes it an attractive catalytic platform.

Journal of Catalysis published new progress about Addition reaction, stereoselective (catalysts). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

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

Xia, Liang; Zhang, Yan; Zhang, Jingbo; Lin, Songwen; Zhang, Kehui; Tian, Hua; Dong, Yi; Xu, Heng published the artcile< Identification of novel thiazolo[5,4-b]pyridine derivatives as potent phosphoinositide 3-kinase inhibitors>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is thiazolopyridine preparation antitumor SAR mol docking phosphoinositide kinase inhibitor; docking analysis; heterocycle; inhibitory potency; phosphoinositide 3-kinase; thiazolo[5,4-b]pyridine.

A series of novel 2-pyridyl, 4-morpholinyl substituted thiazolo[5,4-b]pyridine analogs I [X=CH, N; R1= H, methoxy; R2 = Me, 2,4-difluorophenyl, 5-chloro-2-thienyl, etc.] was designed and synthesized. These thiazolo[5,4-b]pyridines were efficiently prepared in seven steps from com. available substances in moderate to good yields. All of these N-heterocyclic compounds were characterized by NMR and high-resolution mass spectrometry anal. and tested for phosphoinositide 3-kinase (PI3K) enzymic assay. The results indicated that these N-heterocyclic compounds showed potent PI3K inhibitory activity, and the IC50 of a representative compound I [X=N; R1= methoxy; R2= 2,4-difluorophenyl] would reach to 3.6 nm. The structure-activity relationships (SAR) study showed that sulfonamide functionality was important for PI3Kα inhibitory activity, and 2-chloro-4-fluorophenyl sulfonamide I [X=N; R1= methoxy; R2 = 2-chloro-4-fluoro-phenyl] or 5-chlorothiophene-2-sulfonamide I [X=N; R1= methoxy; R2= 5-chloro-2-thienyl] showed potent inhibitory activity with a nanomolar IC50 value. The pyridyl attached to thiazolo[5,4-b]pyridine was another key structural unit for PI3Kα inhibitory potency, and replacement by Ph leaded to a significant decrease in activity. Enzymic Inhibition results showed that compound I [X=N; R1= methoxy; R2= 2,4-difluorophenyl] inhibited PI3Kα, PI3Kγ, or PI3Kδ with a nanomolar IC50 value, but its inhibitory activity on PI3Kβ was approx. 10-fold reduced. Further docking anal. revealed that the N-heterocyclic core of compound I [X=N; R1= methoxy; R2= 2,4-difluorophenyl] was directly involved in the binding to the kinase through the key hydrogen bonds interaction.

Molecules published new progress about Antitumor agents. 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

Liu, Xing-Ya; Xie, Rui-Yang; Chen, Tao; He, Lei; Wang, Ting; Liao, Wang; Liu, Zhi-Guo; Chen, Ming-Jun published the artcile< Improvement of polyurethane film strength by H-bonding crosslinking with hydroxylated melamine>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is hydroxylated melamine filler aqueous polyurethane film strength H bonding.

Due to the condensation reaction of hydroxylated melamine mols. is possible to take place in the whole pH range, especially in acidic water medium or at high temperature, losing its water solubility In this work, freeze drying perfectly removes water at pretty low temperature, avoiding condensation reaction of hydroxylated melamine. Therefore, a hydroxylated melamine in solid form (MOH-S) was prepared It can be not only dissolved in water after storing for 180 days but also well dispersed in waterborne polyurethane emulsion. The addition of hydroxylated melamine significantly improves the tensile strength of polyurethane films by 170%. After soaking the films in water for 24 h, the tensile strength of WPU/30%MOH-S film lost only 6%, but 34% loss for the neat. Fourier transform IR spectroscopy peak fitting demonstrates that the H-bonding degree of N-H in WPU/30%MOH-S film is 20.72 that is much higher than 3.33 in neat WPU. This indicates that H-bonding cross-linked structure is formed between polyurethane chains and hydroxylated melamine mols. This work provides an effective strategy for preparing stable hydroxylated melamine and enhancing the strength of polyurethane film.

Journal of Applied Polymer Science published new progress about Condensation reaction. 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

Mahran, M. R.; Sidky, M. M.; Wamhoff, H. published the artcile< Photolysis of 2-(2-furyl)benzimidazole (Fuberidazole)>, Synthetic Route of 112-63-0, the main research area is photolysis benzimidazole furyl.

The title photolysis in MeOH in the presence and in the absence of singlet O2 was studied. I, II, and III were isolated and identified in both reactions.

Chemosphere published new progress about Photolysis. 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

Daniarta, Sindu; Kolasinski, Piotr; Imre, Attila R. published the artcile< Thermodynamic efficiency of trilateral flash cycle, organic Rankine cycle and partially evaporated organic Rankine cycle>, COA of Formula: C19H34O2, the main research area is evaporated organic Rankine cycle thermodn efficiency.

Emerging and promising ways of utilizing any heat sources from geothermal, solar, combustion, and industrial waste heat may be the application of power plants that are operating according to conventional Rankine cycle (RC), organic Rankine cycle (ORC), trilateral flash cycle (TFC) employing different types of expansion (i.e., volumetric expanders or turbine). In this paper, the studies about partially evaporated ORC (PE-ORC) was carried out; furthermore, it reports on novel results related to the comparison of thermodn. efficiency of TFC, ORC and PE-ORC. These results were obtained by modeling the system operations computed with MATLAB and the thermal properties library taken from CoolProp and REFPROP. The calculation was based on selected different types of working fluid classified by A, C, Z, M, N points (conventionally categorized by dry, wet, and isentropic working fluids) and the upper-lower operating temperature The obtained results explain a new point of view on the efficiency of TFC, ORC and PE-ORC plants, that in some of the conditions (i.e., one can find certain combinations of working fluid quality, maximal and minimal cycle temperature), the efficiency of PE-ORCs outperforms TFC and ORC. It means that at certain temperature ranges and conditions when starting the expansion step from a partially evaporated state, it may be recommended to improve the performance of the cycle. It seems that obtained results offer new insight to scientists and engineers in designing the thermal power plant working under a subcritical cycle with high-temperature heat sources or a low-temperature heat sinks employing the selection of working fluids and different types of expanders.

Energy Conversion and Management published new progress about Engineers. 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

Yu, Yi-fan; Yang, Jiashuo; Zhao, Fengguang; Lin, Ying; Han, Shuangyan published the artcile< Comparative transcriptome and metabolome analyses reveal the methanol dissimilation pathway of Pichia pastoris>, Product Details of C19H34O2, the main research area is Pichia methanol dissimilation pathway transcriptome metabolome; Dissimilation pathway; Formaldehyde; Glutathione; Methanol metabolism; Oxidative phosphorylation.

Pichia pastoris (Komagataella phaffii) is a model organism widely used for the recombinant expression of eukaryotic proteins, and it can metabolize methanol as its sole carbon and energy source. Methanol is oxidized to formaldehyde by alc. oxidase (AOX). In the dissimilation pathway, formaldehyde is oxidized to CO2 by formaldehyde dehydrogenase (FLD), S-hydroxymethyl glutathione hydrolase (FGH) and formate dehydrogenase (FDH). The transcriptome and metabolome of P. pastoris were determined under methanol cultivation when its dissimilation pathway cut off. Firstly, Δfld and Δfgh were significantly different compared to the wild type (GS115), with a 60.98% and 23.66% reduction in biomass, resp. The differential metabolites between GS115 and Δfld were mainly enriched in ABC transporters, amino acid biosynthesis, and protein digestion and absorption. Secondly, comparative transcriptome between knockout and wild type strains showed that oxidative phosphorylation, glycolysis and the TCA cycle were downregulated, while alc. metabolism, proteasomes, autophagy and peroxisomes were upregulated. Interestingly, the down-regulation of the oxidative phosphorylation pathway was pos. correlated with the gene order of dissimilation pathway knockdown. In addition, there were significant differences in amino acid metabolism and glutathione redox cycling that raised our concerns about formaldehyde sorption in cells. This is the first time that integrity of dissimilation pathway anal. based on transcriptomics and metabolomics was carried out in Pichia pastoris. The blockage of dissimilation pathway significantly down-regulates the level of oxidative phosphorylation and weakens the methanol assimilation pathway to the point where deficiencies in energy supply and carbon fixation result in inefficient biomass accumulation and genetic replication. In addition, transcriptional upregulation of the proteasome and autophagy may be a stress response to resolve formaldehyde-induced DNA-protein crosslinking.

BMC Genomics published new progress about Absorption (protein). 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

Fawdon, Jack; Ihli, Johannes; Mantia, Fabio La; Pasta, Mauro published the artcile< Characterising lithium-ion electrolytes via operando Raman microspectroscopy>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is lithium ion electrolyte operando raman microspectroscopy.

Knowledge of electrolyte transport and thermodn. properties in Li-ion and beyond Li-ion technologies is vital for their continued development and success. Here, we present a method for fully characterizing electrolyte systems. By measuring the electrolyte concentration gradient over time via operando Raman microspectroscopy, in tandem with potentiostatic electrochem. impedance spectroscopy, the Fickian “”apparent”” diffusion coefficient, transference number, thermodn. factor, ionic conductivity and resistance of charge-transfer were quantified within a single exptl. setup. Using lithium bis(fluorosulfonyl)imide (LiFSI) in tetraglyme (G4) as a model system, our study provides a visualisation of the electrolyte concentration gradient; a method for determining key electrolyte properties, and a necessary technique for correlating bulk intermol. electrolyte structure with the described transport and thermodn. properties.

Nature Communications published new progress about Dielectric spectroscopy. 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