Month: November 2022

Sheng, Lei; Hu, Fan; Yu, Hanqing; Tao, Xueyou; Jia, Rumeng; Gu, Yufeng; Chen, Lu; Kong, Hong; Miao, Chen; Fei, Wenjing; Yang, Yang; Jia, Jinhui; Zhu, Xia; He, Xueming; Hu, Liang; Ma, Jianxin; Liu, Wen-Tao; Yang, Mi published the artcile< Paeoniflorin inhibits ASK1-TF axis by up-regulating SOCS3 to alleviate radiation enteritis>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is paeoniflorin antiinflammatory agent ASK1 TF SOCS3 radiation enteritis; ASK1; SOCS3; TF; paeoniflorin; radiation enteritis.

Radiation enteritis is one of the main adverse effects of radiotherapy, presenting with a poorly understood etiol. and limited options for therapy. Intestinal inflammation and ischemia are the core mechanisms of radiation enteritis. Suppressor of cytokine signaling 3 (SOCS3) is an endogenous “”inflammation brake.”” We hypothesized that paeoniflorin, a pinane monoterpene bitter glycoside, could increase SOCS3 expression to reduce inflammation and ischemia and improve enteritis in mice. Laser Doppler flowmetry was used to detect changes in intestinal blood flow. RAW264.7 and human umbilical vein endothelial cells were used to investigate the mechanism of action of paeoniflorin. It was observed that radiation caused high mortality, intestinal inflammatory responses, and low blood flow in mice. Paeoniflorin effectively alleviated intestinal atrophy, prevented thrombosis, improved radiation enteritis, and reduced mortality in mice undergoing radiotherapy. In addition, paeoniflorin increased the release of growth arrest-specific gene 6 (Gas6) and phosphorylation of the Axl receptor, subsequently inducing the expression of SOCS3 and inhibiting the expression of p-apoptosis signal-regulating kinase 1 and tissue factor in vivo and in vitro. Based on our findings, we suggest that paeoniflorin is potentially effective in alleviating radiation enteritis via the activation of the Gas6/Axl/SOCS3 axis and subsequent reduction in intestinal inflammation and ischemia.

Frontiers in Pharmacology published new progress about Analgesics. 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

Zhang, Weixuan; Wang, Mixue; Zhao, Haocheng; Liu, Xin; Liu, Ruoyun; Xie, Xiaoling; Wu, Yuling published the artcile< Synthesis and characterization of electrolyte substrate materials based on hyperbranched polyurethane elastomers for anodic bonding>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is electrolyte substrate hyperbranched polyurethane elastomer anodic bonding.

A series of hyperbranched polyurethane elastomers (PEO-HBPUEs) as polymer electrolyte substrate materials was developed for anodic bonding with aluminum (Al) foil in micro-electro-mech. system (MEMS) devices. The PEO-HBPUEs were prepared by pre-polymerization method with toluene-2,4-diisocyanate(TDI), polypropylene glycol (PPG), 1,4-butanediol(BDO), trimethylolpropane(TMP), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), and polyethylene oxide (PEO)-based electrolyte in varying proportions via solution casting technique at room temperature All prepared PEO-HBPUEs exhibited low glass transition temperatures, good thermal stabilities, and suitable mech. properties. The x-ray diffraction results showed that PEO-HBPUEs are amorphous, and LiTFSI was well dissolved in the polymer matrix. The component of PEO-based electrolyte in PEO-HBPUEs contributed to increase the ionic conductivity, of which the highest value reached 1.23 × 10-3 S/cm at 75°C for PEO-HBPUE4. The anodic bonding of PEO-HBPUE substrate with Al foil was conducted by the coupling action of elec. field, temperature field, and pressure field. A clear intermediate bonding layer between the substrate and Al foil was observed and the elements diffusion around bonding layer can be detected by SEM, indicating PEO-HBPUEs and Al foil were jointed together successfully. The highest tensile strength of the bonding interface of PEO-HBPUE4/Al reached 1.88 MPa. All results demonstrated that the prepared PEO-HBPUEs materials would be promising substrates for flexible MEMS device that can be applied to flexible packaging by anodic bonding technol.

Journal of Applied Polymer Science published new progress about Anodic bonding. 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

Shi, Y-Y; Cui, H-F; Qin, B-J published the artcile< Monomethyl fumarate protects cerebral hemorrhage injury in rats via activating microRNA-139/Nrf2 axis.>, Application of C19H34O2, the main research area is .

OBJECTIVE: Monomethyl fumarate (MF) exerts anti-inflammatory and antioxidant capacities. Whether microRNA-139 and nuclear factor (erythroid-derived 2)-like 2 (Nrf2) are involved in the pharmacological activity of MF remain unclear. We aim to elucidate the potential function of MF in intracerebral hemorrhage (ICH), and its possible mechanism. MATERIALS AND METHODS: Twenty-four Sprague Dawley (SD) rats were randomly assigned into sham group, ICH group and MF group, with 8 rats in each group. Rats in ICH and MF group were subjected to ICH procedures. Rat brain tissues were harvested at 48 h after ICH procedures. Evans blue extravasation was performed to evaluate ICH-induced rat brain damage. Content of cerebral edema and neurological deficit were examined to reflect the neuronal pathological lesions. Reactive oxygen species (ROS) content in rat brain was examined by immunofluorescence. Activities of oxidative stress indexes in rat brain homogenate were detected using relative commercial kits. MicroRNA-139 expression in rat brain was quantified by quantitative Real-time polymerase chain reaction (qRT-PCR). Finally, protein levels of Nrf2, HO-1, NQO1 and nuclear factor-kappa B (NF-κB) in rat brain tissues were examined by Western blot. RESULTS: Compared with rats in sham group, neurological deficit scores of rats in ICH group were lower. Disruption of blood-brain barrier and brain tissue edema of rats were pronounced in ICH group. However, MF pretreatment markedly alleviated the above mentioned cerebral lesions. In addition, MF pretreatment increased activities of SOD, GSH and CAT, but decreased MDA and ROS contents in rat brain homogenate relative to those in ICH group (p<0.05). Western blot analysis found that expression levels of Nrf2, HO-1 and NQO-1 were markedly upregulated after MF pretreatment, while the expression level of NF-κB was downregulated. At the cellular level, we altered microRNA-139 expression in SH-SY5Y cells by transfection of microRNA-139 mimics or inhibitor. Overexpression of microRNA-139 remarkably increased Nrf2 expression and decreased NF-κB expression. Treatment of high-dose MF upregulated Nrf2, downregulated NF-κB and decreased ROS content in SH-SY5Y cells. CONCLUSIONS: MF protects ICH in rats by inhibiting oxidative stress and inflammatory response through activating microRNA-139/Nrf2 axis. European review for medical and pharmacological sciences published new progress about 112-63-0. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

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

Baraldi, Pier G.; Bazzanini, Rita; Manfredini, Stefano; Simoni, Daniele; Robins, Morris J. published the artcile< Facile access to 2'-O-acyl prodrugs of 1-(β-D-arabinofuranosyl)-5(E)-(2-bromovinyl)uracil (BVAraU) via regioselective esterase-catalyzed hydrolysis of 2',3',5'-triesters>, Product Details of C19H34O2, the main research area is acylarabinofuranosyluracil preparation regioselective hydrolysis esterase catalyst; arabinofuranosyl bromovinyluracil.

Treatment of 1-(2,3,5-tri-O-acetyl-β-D-arabinofuranosyl)-5-[2-(trimethylsilyl)-vinyl]uracil with pyridinium bromide perbromide and deacetylation gave BVAraU I (R = H). Pig liver esterase (EC 3.1.1.1) catalyzed the regioselective hydrolysis of 1-(2,3,5-tri-O-acyl-β-D-arabinofuranosyl)uracil derivatives to their 2′-O-acyl monoesters, e.g. I [R = Ac, Bz, Me(CH2)3CO].

Tetrahedron Letters published new progress about Hydrolysis, regioselective. 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

Levin, P. P.; Brzhevskaya, O. N.; Nedelina, O. S. published the artcile< Kinetics of hydrated electron reactions with phosphate anions: a laser photolysis study>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is hydrated electron decay kinetics photolysis sodium pyrenesulfonate phosphate anion.

The decay kinetics of hydrated electron (eaq-) formed upon photolysis of aqueous solutions of sodium pyrene-1,3,6,8-tetrasulfonate at λ = 337 nm in the presence of phosphate anions (up to 2 mol L-1) was studied by nanosecond laser-pulse photolysis in a wide range of pH (3.5-10) and ionic strength (I, up to 2 mol L-1) values. At high pH values, where the HPO42- ions dominate, the eaq- decay kinetics depends only slightly on phosphate concentration (rate constant for the reaction is at most 2·105 L mol-1 s-1). The H2PO4- ions react with eaq- at a rate constant of 2.8·106 L mol-1 s-1 (I = 0), which increases linearly with the parameter exp(√I/(1 + √I)) in accordance with the Debye-Hueckel theory. The rate constant for quenching of eaq- by H3PO4 at pH ≤ 4 decreases linearly with the parameter exp(√I/(1 + √I)) due to the secondary salt effect and equals 1.6·109 L mol-1 s-1 at I = 0. The logarithm of the rate constant for quenching of eaq- by phosphates is linearly related to the number of the O-H bonds in the phosphate mol.

Russian Chemical Bulletin published new progress about Ionic strength. 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

Dahanayake, Jayangika N.; Kasireddy, Chandana; Ellis, Jonathan M.; Hildebrandt, Derek; Hull, Olivia A.; Karnes, Joseph P.; Morlan, Dylan; Mitchell-Koch, Katie R. published the artcile< Evaluating electronic structure methods for accurate calculation of 19F chemical shifts in fluorinated amino acids>, Category: esters-buliding-blocks, the main research area is electronic structure fluorine 19 shift fluorinated amino acid; DFT; chemical shifts; density functional; fluorinated amino acids; fluorine NMR; fluorolabeling; scaling factors; shielding.

The ability of electronic structure methods (11 d. functionals, HF, and MP2 calculations; two basis sets and two solvation models) to accurately calculate the 19F chem. shifts of 31 structures of fluorinated amino acids and analogs with known exptl. 19F NMR spectra has been evaluated. For this task, BHandHLYP, ωB97X, and Hartree-Fock with scaling factors (provided within) are most accurate. Addnl., the accuracy of methods to calculate relative changes in fluorine shielding across 23 sets of structural variants, such as zwitterionic amino acids vs. side chains only, was also determined This latter criterion may be a better indicator of reliable methods for the ultimate goal of assigning and interpreting chem. shifts of fluorinated amino acids in proteins. MP2 and M062X calculations most accurately assess changes in shielding among analogs. These results serve as a guide for computational developments to calculate 19F chem. shifts in biomol. environments.

Journal of Computational Chemistry published new progress about Amino acids Role: ANT (Analyte), BSU (Biological Study, Unclassified), PRP (Properties), ANST (Analytical Study), BIOL (Biological Study) (fluorinated). 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

Xu, Yang; Li, Yuting; Li, Jiaxin; Chen, Wei published the artcile< Ethyl carbamate triggers ferroptosis in liver through inhibiting GSH synthesis and suppressing Nrf2 activation>, Product Details of C15H22N2O2, the main research area is ethyl carbamate GSH Nrf2 ferroptosis oxidative stress toxicity; Ethyl carbamate; Ferroptosis; GSH depletion; Lipid peroxidation; Nrf2.

Humans are inevitably exposed to Et carbamate (EC) via consumption of fermented food and beverages. EC, known as an environmental toxin, can cause oxidative stress-mediated severe toxicity, but the underlying mechanisms remain unveiled. Ferroptosis is a newly identified ROS-mediated non-apoptotic cell death characterized by iron accumulation and excessive lipid oxidation In this study, we first found that EC triggered ferroptosis in liver cells by detection of decreased cell viability, GSH, GPX4 and Ferritin levels, as well as increased iron and MDA contents. Ferroptosis inhibitor ferrostatin-1 (Fer-1) pretreatment rescued ferroptotic damage, indicating that ferroptosis was critical for EC-caused cell death. Furthermore, GSH synthesis precursor N-acetylcysteine displayed significant anti-ferroptotic properties and we suggested that GSH depletion might be the main cause of ferroptosis under EC exposure. EC-triggered GSH depletion mainly depended on suppressed GSH synthesis via inhibition of SLC7A11 and GCLC expressions. Notably, EC blocked Nrf2 activation by repression of phosphorylation modification and nuclear translocation, which further resulted in ferroptosis occurrence. We also observed EC-induced liver dysfunction and inflammation, accompanied with oxidative stress, ferroptosis and downregulated Nrf2 signaling in Balb/c mice, which could be effectively reversed by Fer-1 and tBHQ pretreatment. Together, our study indicated that ferroptosis is a new mechanism for EC-caused toxicity, which was attributed to Nrf2 inactivation and GSH depletion.

Redox Biology published new progress about Cell viability. 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

Khalil, Ali; Gerardin-Charbonnier, Christine; Chapuis, Hubert; Ferji, Khalid; Six, Jean-Luc published the artcile< Original Bio-Based Antioxidant Poly(meth)acrylate from Gallic Acid-Based Monomers>, Computed Properties of 112-63-0, the main research area is original bioantioxidant polymethacrylate gallate monomer.

Herein, we report a multistep synthesis of novel (meth)acrylate monomers based on gallic acid (GA), a biosourced phenolic acid. The objective of this work was to obtain bio-based polymers exhibiting antioxidant properties provided by monomers derived from gallic acid. The phenolic groups of GA, which are responsible for antioxidant properties, need to be protected for two reasons. On the one hand, functionalization to transform GA into polymerizable monomers must not take place at the phenolic groups because they must remain free to maintain the maximum antioxidant activity in the final polymers. On the other hand, their protection is necessary to prevent radical scavenging during the radical polymerization After synthesis of such monomers, protected GA-based polymers were thus produced through a photo-mediated RAFT polymerization at room temperature by evaluating two trithiocarbonate-type chain transfer agents (CTAs). The kinetics and mol. weight distributions were studied depending on the monomers and the CTAs. Protected polymers were then deprotected to afford polymeric chains carrying one free gallic acid moiety on each monomer unit. The antioxidant activity of these free GA-based polymers was demonstrated either through the DPPH free radical scavenging property or through the inhibition of Me linoleate oxidation

ACS Sustainable Chemistry & Engineering published new progress about Antioxidants. 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

Taniguchi, Yosuke; Magata, Yuya; Osuki, Takayuki; Notomi, Ryotaro; Wang, Lei; Okamura, Hidenori; Sasaki, Shigeki published the artcile< Development of novel C-nucleoside analogues for the formation of antiparallel-type triplex DNA with duplex DNA that includes TA and dUA base pairs>, COA of Formula: C19H34O2, the main research area is nucleoside DNA duplex triplex association constant.

Expansion of the triplex DNA forming sequence is required in the genomic targeting fields. Basically, triplex DNA is formed by the interaction between the triplex-forming oligonucleotides and homo-purine region with the target duplex DNA. The presence of the base pair conversion sites hampers stable triplex formation. To overcome this limitation, it is necessary to develop an artificial nucleic acid to recognize the base conversion sites, and the CG and TA base pairs. We describe the synthesis of C-nucleoside analogs and an evaluation of the ability of triplex formation. Consequently, the combined use of the novel C-nucleoside analogs, AY – AY-d(Y-NH2), AY-d(Y-Cl) and IAP-d(Y-Cl), is capable of recognizing duplex DNA including the TA or dUA base pair.

Organic & Biomolecular Chemistry published new progress about DNA Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 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

Jankowski, Piotr; Andersson, Rasmus; Johansson, Patrik published the artcile< Designing High-Performant Lithium Battery Electrolytes by Utilizing Two Natures of Li+ Coordination: LiTDI/LiTFSI in Tetraglyme>, HPLC of Formula: 112-63-0, the main research area is tetraglyme lithium battery electrolyte spectrum.

Highly concentrated electrolytes (HCEs) based on glymes, such as tetraglyme (G4), are currently the focus of much battery research, primarily due to their unique properties – especially with respect to ion transport and electrochem. stability. While the LiTFSI-G4 and LiTDI-G4 systems both have been studied extensively, we here design their hybrid electrolytes to answer; will the resulting properties be averages/superpositions or will there be synergies created We find the latter to be true and demonstrate that the most performant electrolytes are obtained by introducing a minor amount of LiTDI to an LiTFSI based electrolyte, which promotes the disproportionation and formation of “”free”” cations and at the same to avoid large aggregates – shown comprehensively both exptl. and by different modeling approaches and analyses combined. This electrolyte composition strategy can be generalized to other salts and solvents and thus a route towards a flora of novel battery electrolytes is here suggested.

Batteries & Supercaps published new progress about Battery electrolytes. 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