Month: November 2022

Jitian, Simion published the artcile< The spectrophotometric determination of pyrene dyes in pharmaceuticals and cosmetics>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is spectrophotometry pyrene dye pharmaceuticals cosmetics.

The paper introduces a method used for the determination of the component concentrations of a ternary mixture of pyrene dyes. The method uses the zero-order spectra of these dyes in the spectral range 190[÷]500 nm. It is based on a combination of the determinant method (Cramer’s method) with information on the absorption bands of the dyes in the mixture The method is applied using the slope and intercept values from the linear calibration curves of the pyrene dyes standard solutions: HP3S, P3S and P4S, at three different wavelengths: The three wavelengths: 290nm, 367nm and 375nm, were selected by means of the Kaiser method. When there is a spectral region in which only one of the components has absorption, the concentration can be determined independently of the presence of the other two dyes in the ternary mixture The method used to determine the concentrations of the other two dyes was the Cramer method or the bivariate spectral calibration method (BSC) that solves a system of two equations with two unknowns.

Annals of the Faculty of Engineering Hunedoara published new progress about Cosmetics and Personal care products. 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

Jiang, Shangxu; Li, Wenbiao; Xie, Yuan; Yan, Xiaoqing; Zhang, Kai; Jia, Zhongfan published the artcile< An All-Organic battery with 2.8 V output voltage>, HPLC of Formula: 112-63-0, the main research area is anthraquinone carbon nanotube nitroxide radical coupling organic battery.

Fully organic batteries have been recognized as ideal alternatives to traditional metal-based energy storage devices. However, significant challenges remain in mitigating their low cell voltage and capacity. Here, we construct an all-organic battery based on TEMPO (i.e., 2,2,6,6-tetramethylpiperidyl-1-oxy) radical polymer cathode, poly(TEMPO methacrylate) (PTMA), and conjugated dicarboxylate anode such as silver terephthalate (Ag2TP). Chem. modification of PTMA with aromatic anthraquinone (AQ) results in P(TMA0.95-co-AQ0.05)1610, in which AQ groups facilitate the mol. level binding to CNTs through non-covalent π-π interaction and enhance the charge and mass transport. This fully organic battery delivers a capacity of 182 mAh g-1 based on the anode at 0.5C with an output voltage of 2.8 V. Although the capacity needs further improvement, our work shows the promise of developing high-voltage, fully organic batteries with a judicious electrode design.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Battery capacity. 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

Dang, Guohui; Li, Tianrun; Yang, Dongmin; Yang, Guangxin; Du, Xing; Yang, Juan; Miao, Yutong; Han, Lulu; Ma, Xiaolong; Song, Yuwei; Liu, Bo; Li, Xuan; Wang, Xian; Feng, Juan published the artcile< T lymphocyte-derived extracellular vesicles aggravate abdominal aortic aneurysm by promoting macrophage lipid peroxidation and migration via pyruvate kinase muscle isozyme 2>, Product Details of C15H22N2O2, the main research area is abdominal aorta aneurysmT lymphocyte macrophage dell migration glycolysis; Abdominal aortic aneurysm; Extracellular vesicles; Lipid peroxidation; Macrophage migration; Pyruvate kinase muscle isozyme 2.

T lymphocyte and macrophage infiltration in the aortic wall is critical for abdominal aortic aneurysm (AAA). However, how T lymphocytes interact with macrophages in the pathogenesis of AAA remains largely uncharacterized. In an elastase-induced murine AAA model, we first found that the expression of pyruvate kinase muscle isoenzyme 2 (PKM2), the last rate-limiting enzyme in glycolysis, was increased in infiltrated T lymphocytes of vascular lesions. T lymphocyte-specific PKM2 deficiency in mice (LckCrePKM2fl/fl) or i.p. administration of the sphingomyelinase inhibitor GW4869 caused a significant attenuation of the elastase-increased aortic diameter, AAA incidence, elastic fiber disruption, matrix metalloproteinases (MMPs) expression, and macrophage infiltration in the vascular adventitia compared with those in PKM2fl/fl mice. Mechanistically, extracellular vesicles (EVs) derived from PKM2-activated T lymphocytes elevated macrophage iron accumulation, lipid peroxidation, and migration in vitro, while macrophages treated with EVs from PKM2-null T lymphocytes or pretreated with the lipid peroxidation inhibitors ferrostatin-1 (Fer-1), liproxstatin-1 (Lip-1), or the iron chelating agent deferoxamine mesylate (DFOM) reversed these effects. In vascular lesions of elastase-induced LckCrePKM2fl/fl mice with AAA, the oxidant system weakened, with downregulated 4-hydroxynonenal (4-HNE) levels and strengthened antioxidant defense systems with upregulated glutathione peroxidase 4 (GPX4) and cystine/glutamate antiporter solute carrier family 7 member 11 (Slc7a11) expressions in macrophages. High-throughput metabolomics showed that EVs derived from PKM2-activated T lymphocytes contained increased levels of polyunsaturated fatty acid (PUFA)-containing phospholipids, which may provide abundant substrates for lipid peroxidation in target macrophages. More importantly, upregulated T lymphocyte PKM2 expression was also found in clin. AAA subjects, and EVs isolated from AAA patient plasma enhanced macrophage iron accumulation, lipid peroxidation, and migration ex vivo. Therefore, from cell-cell crosstalk and metabolic perspectives, the present study shows that PKM2-activated T lymphocyte-derived EVs may drive AAA progression by promoting macrophage redox imbalance and migration, and targeting the T lymphocyte-EV-macrophage axis may be a potential strategy for early warning and treating AAA.

Redox Biology published new progress about Abdominal aorta aneurysm. 347174-05-4 belongs to class esters-buliding-blocks, and the molecular formula is C15H22N2O2, Product Details of C15H22N2O2.

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

Guo, Yong; Hou, Enhua; Ma, Nannan; Liu, Zhiyan; Fan, Jiangping; Yang, Ruige published the artcile< Discovery, biological evaluation and docking studies of novel N-acyl-2-aminothiazoles fused (+)-nootkatone from Citrus paradisi Macf. as potential α-glucosidase inhibitors>, Computed Properties of 112-63-0, the main research area is nootkatone aminothiazole synthesis antidiabetic cytotoxicity glucosidase diabetes; (+)-Nootkatone; Cytotoxicity; Molecular docking; Thiazole; Type-2 diabetes; α-Glucosidase inhibitor.

Nowadays, the discovery and development of α-glucosidase inhibitors from natural products or their derivatives represents an attractive approach. Here we reported studies on a series of novel N-acyl-2-aminothiazoles fused (+)-nootkatone and evaluation for their α-glucosidase inhibitory activities. Most of (+)-nootkatone derivatives exhibited more potent α-glucosidase inhibitory ability than the pos. drug acarbose. In particular, compounds I and II showed the most promising α-glucosidase inhibitory ability with IC50 values of 13.2 and 13.8 μM. I and II also exhibited relatively low cytotoxicities towards normal LO2 cells. Kinetic study indicated that compounds I and II inhibited the α-glucosidase in a noncompetitive manner, and mol. docking results were in line with the noncompetitive characteristics that I and II did not bind to the known active sites (Asp214, Glu276 and Asp349). Based on our findings, these (+)-nootkatone derivatives could be used as antidiabetic candidates.

Bioorganic Chemistry published new progress about Antidiabetic agents. 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

Ma, Yirui; Jin, Tianwei; Choudhury, Rishav; Cheng, Qian; Miao, Yupeng; Zheng, Changxi; Min, Wei; Yang, Yuan published the artcile< Understanding the correlation between lithium dendrite growth and local material properties by machine learning>, Quality Control of 112-63-0, the main research area is lithium metal battery dendrite growth neural network machine learning.

Lithium metal batteries are attractive for next-generation energy storage because of their high energy d. A major obstacle to their commercialization is the uncontrollable growth of lithium dendrites, which arises from complicated but poorly understood interactions at the electrolyte/electrode interface. In this work, we use a machine learning-based artificial neural network (ANN) model to explore how the lithium growth rate is affected by local material properties, such as surface curvature, ion concentration in the electrolyte, and the lithium growth rates at previous moments. The ion concentration in the electrolyte was acquired by Stimulated Raman Scattering Microscopy, which is often missing in past exptl. data-based modeling. The ANN network reached a high correlation coefficient of 0.8 between predicted and exptl. values. Further sensitivity anal. based on the ANN model demonstrated that the salt concentration and concentration gradient, as well as the prior lithium growth rate, have the highest impacts on the lithium dendrite growth rate at the next moment. This work shows the potential capability of the ANN model to forecast lithium growth rate, and unveil the inner dependency of the lithium dendrite growth rate on various factors.

Journal of the Electrochemical Society published new progress about Battery electrodes. 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

Takano, Seiichi; Iwabuchi, Yoshiharu; Ogasawara, Kunio published the artcile< The Katsuki-Sharpless asymmetric epoxidation of (E)-2,5-dihydroxy-2,5-dimethyl-3-hexene>, Electric Literature of 617-55-0, the main research area is asym epoxidation tertiary allylic alc; Katsuki Sharpless epoxidation dihydroxydimethylhexene; absolute configuration epoxydihydroxydimethylhexane.

The first asym. epoxidation of a tertiary allylic alc. by the Katsuki-Sharpless reaction has been demonstrated using (E)-Me2C(OH)CH:CHCMe2OH as a tertiary allylic alc. substrate to afford optically active epoxide I. In 70% ee in an excellent chem. yield.

Tetrahedron Letters published new progress about Absolute configuration. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Electric Literature of 617-55-0.

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

Chang, C.-Y.; Kashale, A. A.; Lee, C.-M.; Chu, S.-L.; Lin, Y.-F.; Chen, I-W. P. published the artcile< Single atomically anchored iron on graphene quantum dots for a highly efficient oxygen evolution reaction>, Formula: C19H34O2, the main research area is dinitrosyl iron graphene quantum dot oxygen evolution reaction electrocatalyst.

The single-atom catalysts (SACs) supported on carbon-based materials are very promising for maximizing their electrocatalytic activity. However, carbon-based SACs are primarily bonded with carbons, resulting in inferior performance in the oxygen evolution reaction (OER). Herein, we develop a novel coordination adsorption strategy for the synthesis of a monodispersed Fe(NO)2 moiety anchored on the nitrogen sites of the nitrogen-doped graphene quantum dots (N-GQDs) to form a Fe(NO)2-N-GQDs complex as an efficient OER catalyst. The resultant Fe(NO)2-N-GQDs complex exhibits a highly stable overpotential of 270 mV at a c.d. of 10 mA cm-2 and a Tafel slope of 48 mV dec-1 together with long-term durability, which greatly outperforms the state-of-the-art ruthenium oxide. Our finding emphasizes the role of electron-transfer resistance changes during a simple synthesis method to enhance electrocatalytic efficiency. Therefore, this work will envision numerous opportunities for creating novel-type carbon-based SACs via nitrogen-metal coordination as highly robust OER catalysts.

Materials Today Energy published new progress about Current density. 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

Gomez Rodriguez, Alexia; Talamonti, Emanuela; Naudi, Alba; Kalinovich, Anastasia V.; Pauter, Anna M.; Barja, Gustavo; Bengtsson, Tore; Jacobsson, Anders; Pamplona, Reinald; Shabalina, Irina G. published the artcile< Elovl2-Ablation Leads to Mitochondrial Membrane Fatty Acid Remodeling and Reduced Efficiency in Mouse Liver Mitochondria>, SDS of cas: 112-63-0, the main research area is Elovl2 mitochondrial membrane fatty acid liver oxidative stress; adenine nucleotide translocase; docosahexaenoic acid (DHA) deficiency; membrane permeabilization; mitochondrial function; oxidative damage markers; polyunsaturated fatty acids.

The fatty acid elongase elongation of very long-chain fatty acids protein 2 (ELOVL2) controls the elongation of polyunsaturated fatty acids (PUFA) producing precursors for omega-3, docosahexaenoic acid (DHA), and omega-6, docosapentaenoic acid (DPAn-6) in vivo. Expectedly, Elovl2-ablation drastically reduced the DHA and DPAn-6 in liver mitochondrial membranes. Unexpectedly, however, total PUFAs levels decreased further than could be explained by Elovl2 ablation. The lipid peroxidation process was not involved in PUFAs reduction since malondialdehyde-lysine (MDAL) and other oxidative stress biomarkers were not enhanced. The content of mitochondrial respiratory chain proteins remained unchanged. Still, membrane remodeling was associated with the high voltage-dependent anion channel (VDAC) and adenine nucleotide translocase 2 (ANT2), a possible reflection of the increased demand on phospholipid transport to the mitochondria. Mitochondrial function was impaired despite preserved content of the respiratory chain proteins and the absence of oxidative damage. Oligomycin-insensitive oxygen consumption increased, and coefficients of respiratory control were reduced by 50%. The mitochondria became very sensitive to fatty acid-induced uncoupling and permeabilization, where ANT2 is involved. Mitochondrial volume and number of peroxisomes increased as revealed by transmission electron microscopy. In conclusion, the results imply that endogenous DHA production is vital for the normal function of mouse liver mitochondria and could be relevant not only for mice but also for human metabolism

Nutrients published new progress about ADP-ATP translocases Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Polrolniczak, Paulina; Walkowiak, Mariusz; Kazmierczak-Razna, Justyna; Kasprzak, Dawid; Mathew, Deepa Elizabeth; Kathiresan, M.; Stephan, A. Manuel; Angulakshmi, N. published the artcile< BaTiO3-g-GO as an efficient permselective material for lithium-sulfur batteries>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is solvothermal nanoparticle thermal conductivity cyclic voltammetry barium titanate; graphene oxide carbon electrochem pulverization.

Notwithstanding the fact that the unique properties such as high theor. capacity, energy d., low cost and environmental benignity have helped in identifying Li-S batteries as a potential successor of lithium-ion batteries, the inherently low conductivity of elemental sulfur, shuttling of polysulfide between two electrodes and undesirable interfacial properties of the lithium metal anode with electrolytes impede this system from commercialization. Myriad strategies have been adopted to surmount these challenges such as encapsulation of elemental sulfur in carbonaceous materials to enhance conductivity, introduction of modified separators to mitigate the shuttling of polysulfide etc. In the present work, hybrid nanoparticles, barium titanate-grafted-graphene oxide (BaTiO-g-GO) was prepared by chem. coupling BaTiO to graphene oxide (GO) sheets by a solvothermal method. Addnl., biomass-derived activated carbon (AC) obtained from sisal fibers was also prepared Trilayer membranes (TLM) were prepared by coating BaTiO-g-GO and AC on either side of the com. available Celgard 2320 separator. The Li-S cells with AC/BaTiO-g-GO-coated trilayer permselective membranes delivered an initial discharge capacity of 1450 mA h g at 0.1C and also appreciably suppressed the self-discharge of Li-S cells even after 40 h which opens up the venue for Li-S batteries to achieve long cycle life without self-discharge for multifarious applications.

Materials Chemistry Frontiers published new progress about Cyclic voltammetry. 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

Kamata, Keigo; Kimura, Toshihiro; Sunaba, Hanako; Mizuno, Noritaka published the artcile< Scope of chemical fixation of carbon dioxide catalyzed by a bifunctional monomeric tungstate>, Category: esters-buliding-blocks, the main research area is tetrabutylammonium tungstate catalyst fixation carbon dioxide; aryl diamine reaction carbon dioxide tetrabutylammonium tungstate catalyst; amine primary reaction carbon dioxide tetrabutylammonium tungstate catalyst; propargylic alc amine reaction carbon dioxide tetrabutylammonium tungstate catalyst.

The tungsten-oxo moiety in a simple monomeric tungstate, TBA2[WO4] (I, TBA = tetrabutylammonium), showed bifunctional activation of both CO2 and 1,2-phenylenediamine (II). It was confirmed by 1H, 13C, and 183W NMR spectroscopies that adducts I-II and I-(CO)n (n = 1 and 2) were formed by the reactions of I with II and CO2, resp. These adducts played important roles in formation of the corresponding carbamic acid intermediates. The present bifunctionality could be applied to chem. fixation of CO2 even at atm. pressure with various kinds of structurally diverse aryl diamines, primary monoamines, propargylic alcs., and propargylic amines into cyclic urea derivatives, 1,3-disubstituted urea derivatives, cyclic carbonates, and cyclic carbamates, resp.

Catalysis Today published new progress about Alcohols, propargyl Role: RCT (Reactant), RACT (Reactant or Reagent). 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