Author: tianli

Reactions catalyzed within inorganic and organic materials and at electrochemical interfaces commonly occur at high coverage and in condensed media, causing turnover rates to depend strongly on interfacial structure and composition, 1611-56-9, Name is 11-Bromoundecan-1-ol, SMILES is OCCCCCCCCCCCBr, in an article , author is Messenlehner, Julia, once mentioned of 1611-56-9, COA of Formula: C11H23BrO.

The catalytic machinery of the FAD-dependent AtBBE-like protein 15 for alcohol oxidation: Y193 and Y479 form a catalytic base, Q438 and R292 an alkoxide binding site

Monolignol oxidoreductases are members of the berberine bridge enzyme-like (BBE-like) protein family (pfam 08031) that oxidize monolignols to the corresponding aldehydes. They are FAD-dependent enzymes that exhibit the para-cresolmethylhydroxylase-topology, also known as vanillyl oxidase-topology. Recently, we have reported the structural and biochemical characterization of two monolignol oxidoreductases from Arabidopsis thaliana, AtBBE13 and AtBBE15. Now, we have conducted a comprehensive site directed mutagenesis study for AtBBE15, to expand our understanding of the catalytic mechanism of this enzyme class. Based on the kinetic properties of active site variants and molecular dynamics simulations, we propose a refined, structure-guided reaction mechanism for the family of monolignol oxidoreductases. Here, we propose that this reaction is facilitated stepwise by the deprotonation of the allylic alcohol and a subsequent hydride transfer from the C alpha-atom of the alkoxide to the flavin. We describe an excessive hydrogen bond network that enables the catalytic mechanism of the enzyme. Within this network Tyr479 and Tyr193 act concertedly as active catalytic bases to facilitate the proton abstraction. Lys436 is indirectly involved in the deprotonation as this residue determines the position of Tyr193 via a cation-pi interaction. The enzyme forms a hydrophilic cavity to accommodate the alkoxide intermediate and to stabilize the transition state from the alkoxide to the aldehyde. By means of molecular dynamics simulations, we have identified two different and distinct binding modes for the substrate in the alcohol and alkoxide state. The alcohol interacts with Tyr193 and Tyr479 while Arg292, Gln438 and Tyr193 form an alkoxide binding site to accommodate this intermediate. The pH-dependency of the activity of the active site variants revealed that the integrity of the alkoxide binding site is also crucial for the fine tuning of the pK(a) of Tyr193 and Tyr479. Sequence alignments showed that key residues for the mechanism are highly conserved, indicating that our proposed mechanism is not only relevant for AtBBE15 but for the majority of BBE-like proteins.

But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity! 1611-56-9, you can contact me at any time and look forward to more communication. COA of Formula: C11H23BrO.

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Related Products of 2516-33-8, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 2516-33-8, Name is Cyclopropylmethanol, SMILES is OCC1CC1, belongs to alcohols-buliding-blocks compound. In a article, author is Capriolo, G., introduce new discover of the category.

High-temperature oxidation of propanol isomers in the mixtures with N2O at high Ar dilution conditions

This work provides, for the first time, new information regarding the kinetics interaction between N2O and propyl alcohol isomers. To this end, the formation and consumption of atomic oxygen were measured behind the reflected shock waves using Atomic Resonance Absorption Spectroscopy (ARAS) technique for 1-10 ppm n- i- propanol + 10 ppm N2O + Ar mixtures, at 2-3 bar and over a wide temperature range of 1700-3200 K. The Konnov and POLIMI detailed combustion mechanisms were assessed against experimental data and also employed to study the main reactions influencing the oxidation dynamics of fuel mixtures under the investigated conditions. The study highlighted a certain difficulty by the models tested in predicting the formation of atomic oxygen at T < 2000 K. The rate of production and the sensitivity analysis was performed with the attempt to identify the most important reactions involved in the process oxidation for future kinetic model refinements. Related Products of 2516-33-8, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 2516-33-8.

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In an article, author is Xiang, Aimin, once mentioned the application of 2807-30-9, Name is 2-Propoxyethanol, molecular formula is C5H12O2, molecular weight is 104.1476, MDL number is MFCD00072645, category is alcohols-buliding-blocks. Now introduce a scientific discovery about this category, Name: 2-Propoxyethanol.

Multifunctional nucleating agents with simultaneous plasticizing, solubilizing, nucleating and their effect on polyvinyl alcohol foams

Currently, preparing microcellular polymer foams by supercritical CO2(Sc-CO2) is a newly trend and challenge. The main limitation of Sc-CO2 used in microcellular foaming industry is its solubility. In this paper, four kinds of amines (formamide, ethylenediamine, polyamide dendrimer (PAMAM) and polyhedral oligomeric silsesquioxane (POSS)) were introduced into polyvinyl alcohol (PVA) to improve the foaming behaviors. The results of differential scanning calorimetry showed that formamide and POSS could plasticize PVA to a certain extent. Through SEM analysis, formamide and ethylenediamine has a nucleating effect and improves the foaming effect. Furthermore, the content of formamide has a great influence on the foaming behavior of PVA. TG-IR analysis showed that -NH2 can react with CO2 to form -HNCOO- at normal temperature and pressure, which contributed to the diffusion of CO2 and improved the uniformity of cell size. With increasing formamide content, the cell density increased from 3.22 x 10(9) cm(-3) to 1.79 x 10(10) cm(-3).

Do you like my blog? If you like, you can also browse other articles about this kind. Thanks for taking the time to read the blog about 2807-30-9, Name: 2-Propoxyethanol.

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In an article, author is Palm, Meredith H., once mentioned the application of 4740-78-7, SDS of cas: 4740-78-7, Name is 1,3-Dioxan-5-ol, molecular formula is C4H8O3, molecular weight is 104.11, MDL number is MFCD00014645, category is alcohols-buliding-blocks. Now introduce a scientific discovery about this category.

Patterns of bi-directional relations across alcohol use, religiosity, and self-control in adolescent girls

Examining predictors of alcohol use among adolescent girls is increasingly important to enhance prevention efforts, given that the gender gap in alcohol use is steadily closing. While both religiosity and self-control have been independently associated with decreased alcohol use, little research has explored 1) whether religiosity and self-control are reciprocally related and 2) whether the reciprocal association between these constructs may indicate different patterns in the development of alcohol use. As such, this study examined whether there are multiple patterns of reciprocal relationships across religiosity, self-control, and alcohol use among adolescent girls. Latent variable mixture modeling was combined with an autoregressive cross-lagged panel model to identify discrete, prototypical patterns of longitudinal associations (i.e., subgroups) across religiosity, self-control, and alcohol use among 2,122 girls ages 13-17. Psychosocial covariates (e.g., conduct problems) were examined as predictors of each subgroup. Two subgroups were identified. Self-control was associated with reduced alcohol use in both the majority (87.56% of the sample) and minority (12.44% of the sample) subgroups, but only the majority subgroup also demonstrated associations between religiosity, self-control, and alcohol use. Religiosity may predict lower alcohol use in a majority of adolescent girls but this association may not be present among all girls, suggesting that there is a qualitative difference in how religiosity is associated with self-control and alcohol use between subgroups. Results also suggest that higher levels of conduct problems may predict which girls are more likely to demonstrate associations between only self-control and alcohol use, and demonstrate no significant associations with religiosity.

If you are interested in 4740-78-7, you can contact me at any time and look forward to more communication. SDS of cas: 4740-78-7.

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Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 13826-35-2, Name is (3-Phenoxyphenyl)methanol, molecular formula is C13H12O2. In an article, author is Xu, Lin,once mentioned of 13826-35-2, Product Details of 13826-35-2.

Kinetic study of carbonylation of ethanol to propionic acid using homogeneous rhodium complex catalyst in the presence of diphosphine ligand

Carbonylation of ethanol is a potentially attractive route for propionic acid production, while its industrial practice is greatly hampered by the low space-time yield. To improve the reaction rate of ethanol carbonylation, a series of diphosphine ligands were investigated in the homogeneous rhodium complex catalyst system. The catalyst activity and stability were enhanced by using bis(diphenylphosphino)methane monosulfide (dppmS) as hemilabile diphosphine ligand and the space-time yield of propionic acid was increased significantly. In the presence of dppmS, not only the effect of ligand addition, the content of ethyl iodide, lithium iodide, and rhodium catalyst on catalytic performance were carried out, but also the reaction conditions were systematically investigated in a titanium alloy autoclave reactor. Consequently, the carbonyl space-time yield reached 6.21 mol.L-1.h(-1) under the optimal reaction conditions. Additionally, the corresponding mechanism of ethanol carbonylation with addition of dppmS was proposed. A kinetic model of the reaction was established in the temperature range of 433-473 K. The reaction orders of catalyst, ethyl iodide, and iodide ion concentrations were determined to be 0.86, 0.36, and 0.20, respectively. The activation energy was found to be 25.23 kJ.mol(-1). Residual error distribution n and a statistical test showed that the kinetic model is reasonable and acceptable.

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Synthetic Route of 2516-33-8, Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. 2516-33-8, Name is Cyclopropylmethanol, SMILES is OCC1CC1, belongs to alcohols-buliding-blocks compound. In a article, author is Bollen, Zoe, introduce new discover of the category.

Prior drinking motives predict alcohol consumption during the COVID-19 lockdown: A cross-sectional online survey among Belgian college students

The global outbreak of coronavirus disease 2019 (COVID-19) and the resulting lockdown measures have raised concerns regarding their effect on alcohol consumption. We investigated alcohol use during lockdown in a population of college students, usually characterized by social and heavy drinking. We also tested the predictive role of pre-lockdown drinking motives on alcohol consumption during lockdown. We collected data from 1951 French-speaking Belgian students during the lockdown period (April 1st – May 3rd, 2020) through a crosssectional online survey. Participants self-reported their daily alcohol consumption (1) during a typical week in normal circumstances (i.e., before lockdown), and (2) since lockdown onset. We also assessed drinking motives and severity of alcohol use before lockdown. Our findings showed that 68.2% of the sample reported a lower alcohol consumption during lockdown compared to before lockdown, 17.2% conversely reporting a higher consumption. Enhancement, social and coping motives were all associated with heavy drinking before lockdown. Enhancement and social motives predicted lower alcohol consumption during lockdown among heavy drinkers. Conversely, coping motives, as well as social motives among low drinkers, predicted higher consumption during lockdown. Conformity motives, as well as enhancement motives among low and moderate drinkers, did not predict alcohol consumption before or during lockdown. Overall, several pre-lockdown drinking motives reliably predicted alcohol consumption during lockdown and could thus be used to identify at-risk populations and to tailor intervention programs on alcohol misuse during sanitary crises.

Synthetic Route of 2516-33-8, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 2516-33-8 is helpful to your research.

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The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 870-72-4, Name is Hydroxymethanesulfonic Acid Sodium Salt, SMILES is O=S(CO)([O-])=O.[Na+], in an article , author is Zhang, Likui, once mentioned of 870-72-4, Formula: CH3NaO4S.

Characterization of a novel type III alcohol dehydrogenase from Thermococcus barophilus Ch5

The genome of the hyperthermophilic and piezophilic euryarchaeaon Thermococcus barophilus Ch5 encodes three putative alcohol dehydrogenases (Tba ADHs). Herein, we characterized Tba ADH(547) biochemically and probed its catalytic mechanism by mutational studies. Our data demonstrate that Tba ADH547 can oxidize ethanol and reduce acetaldehyde at high temperature with the same optimal temperature (75 degrees C) and exhibit similar thermostability for oxidization and reduction reactions. However, Tba ADH(547) has different optimal pH for oxidation and reduction: 8.5 for oxidation and 7.0 for reduction. Tba ADH(547) is dependent on a divalent ion for its oxidation activity, among which Mn2+ is optimal. However, Tba ADH(547) displays about 20% reduction activity without a divalent ion, and the maximal activity with Fe2+. Furthermore, Tba ADH(547) showcases a strong substrate preference for 1-butanol and 1-hexanol over ethanol and other alcohols. Similarly, Tba ADH(547) prefers butylaldehyde to acetaldehyde as its reduction substrate. Mutational studies showed that the mutations of residues D195, H199, H262 and H274 to Ala result in the significant activity loss of Tba ADH(547), suggesting that residues D195, H199, H262 and H274 are responsible for catalysis. Overall, Tba ADH(547) is a thermoactive ADH with novel biochemical characteristics, thereby allowing this enzyme to be a potential biocatalyst. (C) 2021 Elsevier B.V. All rights reserved.

Interested yet? Read on for other articles about 870-72-4, you can contact me at any time and look forward to more communication. Formula: CH3NaO4S.

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2516-33-8, Name is Cyclopropylmethanol, molecular formula is C4H8O, belongs to alcohols-buliding-blocks compound, is a common compound. In a patnet, author is Xiang, Aimin, once mentioned the new application about 2516-33-8, SDS of cas: 2516-33-8.

Multifunctional nucleating agents with simultaneous plasticizing, solubilizing, nucleating and their effect on polyvinyl alcohol foams

Currently, preparing microcellular polymer foams by supercritical CO2(Sc-CO2) is a newly trend and challenge. The main limitation of Sc-CO2 used in microcellular foaming industry is its solubility. In this paper, four kinds of amines (formamide, ethylenediamine, polyamide dendrimer (PAMAM) and polyhedral oligomeric silsesquioxane (POSS)) were introduced into polyvinyl alcohol (PVA) to improve the foaming behaviors. The results of differential scanning calorimetry showed that formamide and POSS could plasticize PVA to a certain extent. Through SEM analysis, formamide and ethylenediamine has a nucleating effect and improves the foaming effect. Furthermore, the content of formamide has a great influence on the foaming behavior of PVA. TG-IR analysis showed that -NH2 can react with CO2 to form -HNCOO- at normal temperature and pressure, which contributed to the diffusion of CO2 and improved the uniformity of cell size. With increasing formamide content, the cell density increased from 3.22 x 10(9) cm(-3) to 1.79 x 10(10) cm(-3).

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Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology. 1562-00-1, Name is Sodium isethionate, molecular formula is , belongs to alcohols-buliding-blocks compound. In a document, author is Xin, Yue, COA of Formula: C2H5NaO4S.

Sirtuin 6 ameliorates alcohol-induced liver injury by reducing endoplasmic reticulum stress in mice

Alcoholic liver disease (ALD) occurs as a result of chronic and excessive alcohol consumption. It encompasses a wide spectrum of chronic liver abnormalities that range from steatosis to alcoholic hepatitis, progressive fibrosis and cirrhosis. Endoplasmic reticulum (ER) stress induced by ethanol metabolism in hepatocytes has been established as an important contributor to the pathogenesis of ALD. However, whether SIRT6 exerts regulatory effects on ethanol-induced ER stress and contributes to the pathogenesis of ALD is unclear. In this study, we developed and characterized Sirt6 hepatocyte-specific knockout and transgenic mouse models that were treated with chronic-plus-binge ethanol feeding. We observed that hepatic Sirt6 deficiency led to exacerbated ethanol-induced liver injury and aggravated hepatic ER stress. Tauroursodeoxycholic acid (TUDCA) treatment remarkably attenuated ethanol-induced ER stress and ameliorated ALD pathologies caused by Sirt6 ablation. Reciprocally, SIRT6 hepatocyte-specific transgenic mice exhibited reduced ER stress and ameliorated liver injury caused by ethanol exposure. Consistently, knockdown of Sirt6 elevated the expression of ER stress related genes in primary hepatocytes treated with ethanol, whereas overexpression of SIRT6 reduced their expression, indicating SIRT6 regulates ethanol-induced hepatic ER stress in a cell autonomous manner. Collectively, our results suggest that SIRT6 is a positive regulator of ethanol-induced ER stress in the liver and protects against ALD by relieving ER stress. (C) 2021 Elsevier Inc. All rights reserved.

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13826-35-2, Name is (3-Phenoxyphenyl)methanol, molecular formula is C13H12O2, belongs to alcohols-buliding-blocks compound, is a common compound. In a patnet, author is Liang, Wensheng, once mentioned the new application about 13826-35-2, Name: (3-Phenoxyphenyl)methanol.

Highly reproducible c-Si texturing by metal-free TMAH etchant and monoTEX agent

Surface texturing of a silicon solar cell is critical to provide surface antireflection and light trapping. The common texturing method based on KOH as an etchant with isopropyl alcohol (IPA) as a wetting agent suffers two disadvantages: introducing metal contamination and low repeatability. To circumvent the limitation of the KOH-IPA method, we develop a new texturing regime by substituting TMAH for KOH, and a commercial surfactant RENA monoTEX for IPA. This TMAH-monoTEX method shows advantages of non-metal contamination, high reproducibility, short process time and small random pyramids. IBC solar cells fabricated with the TMAH-monoTEX texture achieved an efficiency of 25% with J(sc) of 42.9 mA/cm(2), V-oc of 719 mV and FF of 81.1%.

We’ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, 13826-35-2. The above is the message from the blog manager. Name: (3-Phenoxyphenyl)methanol.

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