Category: esters-buliding-blocks

Tilford, R. William; Gemmill, William R.; zur Loye, Hans-Conrad; Lavigne, John J. published the artcile< Facile Synthesis of a Highly Crystalline, Covalently Linked Porous Boronate Network>, Application of C19H34O2, the main research area is polyboronate ester synthesis dehydration.

A covalent organic framework (COF-18Å) based on poly(boronate ester)s has been successfully synthesized through a facile dehydration process in 85-95% isolated yield. Spectroscopic characterization confirms formation of the intended ester linkages as the key structural motif forming infinite 2D hexagonally porous sheets. Powder x-ray diffraction studies were used to determine the stacking orientation between the ester-linked sheets, such that atoms in adjacent layers lie directly over each other, resulting in a hexagonal array of 1D, 18 Å pores. COF-18Å exhibits rigid, thermally stable (to 500 °C) pores with high surface area (1260 m2/g) and a micropore volume of 0.29 cm3/g.

Chemistry of Materials published new progress about Polyesters Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation) (polyborate network). 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

Takeuchi, Toshifumi; Dobashi, Akira; Kimura, Kanako published the artcile< Molecular Imprinting of Biotin Derivatives and Its Application to Competitive Binding Assay Using Nonisotopic Labeled Ligands>, Application of C19H34O2, the main research area is mol imprinting biotin nonisotopic labeled ligand; polymer based competitive binding assay.

Synthetic biotin-binding polymers were prepared by mol. imprinting. Methacrylic acid (MAA) was copolymerized with ethylene glycol dimethacrylate in the presence of biotin Me ester (B-Me) in chloroform. Hydrogen-bonding-based complexation of B-Me with MAA generates the binding sites complementary to B-Me after extracting B-Me from the resulting copolymers. Data from NMR titration suggest a one-to-one prepolymerization complex formation of B-Me with MAA in chloroform. A possible complex structure was estimated by docking of the most stable conformers by intermol. Monte Carlo conformational search under the assumption of a one-to-one association The selectivity of the imprinted polymers was investigated and an imprinted polymer-based competitive binding assay for B-Me was demonstrated using biotin p-nitrophenyl ester as a nonisotopic-labeled ligand.

Analytical Chemistry published new progress about Analysis (polymer-based competitive binding assay). 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

Kim, Soo-Bin; Park, Jin-Sook published the artcile< Parashewanella hymeniacidonis sp. nov., isolated from marine sponge (Hymeniacidon sinapium)>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is marine sponge Hymeniacidon sinapium Parashewanella hymeniacidonis; 16S rRNA gene sequence; Parashewanella hymeniacidonis; polyphasic taxonomy; sponge.

A flagella bacterium, designated strain 202IG2-18T was isolated from a marine sponge Hymeniacidon sinapium from Ulleung-do in the Republic of Korea. Cells were Gram-stain-neg., motile, aerobic, rod-shaped and non-pigmented. The strain was able to grow at pH 5.5-9.5 (optimum, pH 7.5), in the presence of 1-5% (w/v) NaCl (optimum, 3%, w/v) and at 18-30°C (optimum, 30°C). Phylogenetic anal. based on 16S rRNA gene sequences revealed that strain 202IG2-18T belonged to the family Shewanellaceae, and was most closely related to [Shewanella] irciniae NRRL B-41466T (97.9%), followed by Parashewanella tropica KCCM 43304T (97.1%), Parashewanella curva KCTC 62318T (96.3%) and Parashewanella spongiae KCTC 22492T (96.2%). The predominant fatty acids were iso-C15:0 (25.7%), C17:1 ω8c (13.5%), summed feature 3 (C16:1 ω7c and/or C16:1 ω6c, 12.7%), iso-C13:0 (10.4%) and C16:0 (9.6%). The only detected respiratory quinone was ubiquinone Q-8. The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, three unidentified glycolipids, two unidentified aminophospholipids, an unidentified phospholipid and an unidentified aminolipid. The G + C content of the genomic DNA was 39.8 mol%. The average nucleotide identity values compared to all other related species was below 72.8% and digital DNA-DNA hybridization values were 21.1-22.3%, all below the threshold for bacterial species delineation. Phenotypic, phylogenetic, genomic and chemotaxonomic characteristics showed that strain 202IG2-18T represents a novel species of the genus Parashewanella, for which the name Parashewanella hymeniacidonis sp. nov. is proposed. The type strain is 202IG2-18T (= KACC 22256T = LMG 32203T).

International Journal of Systematic and Evolutionary Microbiology published new progress about 16S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Huang, Zhanpeng; Song, Bin; Zhang, Hong; Feng, Fan; Zhang, Wenli; Lu, Ke; Chen, Qianwang published the artcile< High-Capacity and Stable Sodium-Sulfur Battery Enabled by Confined Electrocatalytic Polysulfides Full Conversion>, COA of Formula: C19H34O2, the main research area is sodium sulfur battery electrocatalytic polysulfide full conversion.

The efficient polysulfide capture and reversible sulfur recovery during reverse charging process are critical to exploiting the full potential of room temperature Na-S batteries. Here, based on a core-shell design strategy, the structural and chem. synergistic manipulation of sodium polysulfides quasi-solid-state reversible conversion is proposed. The sulfur is encapsulated in the multi-pores of 3D interconnected carbon fiber as the core structure. The Fe(CN)64–doped polypyrrole film serves as a redox-active polar shell to lock up polysulfides and promote complete polysulfide conversion. Importantly, the short-chain Na2S4 polysulfides are reduced to Na2S directly leaving with a small fraction of soluble intermediates as the cation-transfer medium at the core/shell interface, and freeing up formation of solid Na2S2 incomplete product. Further, the redox mediator with open Fe species electrocatalytically lowers the Na2S oxidation energy barrier and renders the high reversibility of electrodeposited Na2S. The tunable quasi-solid-state reversible sulfur conversion under versatile polymer sheath greatly enhances sulfur utilization, affording a remarkable capacity of 1071 mAh g-1 and a stable high capacity of 700 mAh g-1 at 200 mA g-1 after 200 cycles. The confined electrocatalytic effect provides a strategy for tuning electrochem. pathway of sulfur species and guarantees high-efficiency sulfur electrochem.

Advanced Functional Materials published new progress about Carbon fibers Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), PROC (Process). 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

Kowar, T.; LeGoff, E. published the artcile< New synthesis of cyclobutadienequinones and benzocyclobutadienequinone>, COA of Formula: C19H34O2, the main research area is cyclobutadienequinone; benzocyclobutadienequinone; quinone benzocyclobutadiene.

Dropwise addition of pyridinium perbromide at -78° to I in anhydrous THF gave 27% II treatment of which with 1,5-diazabicyclo[4.3.0]non-5-ene gave 92% III.

Synthesis published new progress about Oxidation. 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

Zhang, Chun-Lin; Ye, Song published the artcile< N-Heterocyclic Carbene-Catalyzed Construction of 1,3,5-Trisubstituted Benzenes from Bromoenals and α-Cyano-β-methylenones>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is heterocyclic carbene catalyst bromoenal cyanomethylenone cyclization; trisubstituted benzene preparation.

A direct and efficient approach to 1,3,5-trisubstituted benzenes has been developed via N-heterocyclic carbene-catalyzed [2 + 4] annulation of α-bromoenals and α-cyano-β-methylenones. The reaction worked well for both aryl- and alkylenones.

Organic Letters published new progress about Benzenoid aromatic compounds Role: SPN (Synthetic Preparation), PREP (Preparation). 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

Kim, Young Sook; Yuk, Heung Joo; Kim, Dong Seon published the artcile< Effect of Jakyakgamcho-tang extracts on H2O2-induced C2C12 myoblasts>, Electric Literature of 112-63-0, the main research area is Jakyakgamcho tang extract hydrogen peroxide myoblast death; C2C12 cell; Jakyakgamcho-tang; antioxidant; muscle atrophy; oxidative stress.

Oxidative stress is a major contributor to muscle aging and loss of muscle tissue. Jakyakgamcho-tang (JGT) has been used in traditional Eastern medicine to treat muscle pain. Here, we compared the total phenolic and flavonoid contents in 30% ethanol and water extracts of JGT and tested the preventive effects against oxidative stress (hydrogen peroxide)-induced cell death in murine C2C12 skeletal muscle cells. The total phenolic content and total flavonoid content in 30% ethanol extracts of JGT were higher than those of water extracts of JGT. Ethanol extracts of JGT (JGT-E) had stronger antioxidant activities of 2,2”-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) and 2,2”-diphenyl-1-picrylhydrazyl-scavenging activity (DPPH) than water extracts of JGT (JGT-W). JGT-E contained 19-53% (1.8 to 4.9-fold) more active compounds (i.e., albiflorin, liquiritin, pentagalloylglucose, isoliquiritin apioside, isoliquiritin, liquiritigenin, and glycyrrhizin) than JGT-W. The ethanol extracts of JGT inhibited hydrogen peroxide-induced cell death and intracellular reactive oxygen species generation more effectively than the water extract of JGT in a dose-dependent manner. For the first time, these results suggest that ethanol extract of JGT is relatively more efficacious at protecting against oxidative stress-induced muscle cell death.

Molecules published new progress about Aging, animal. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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

Kandoi, Deepika; Ruhil, Kamal; Govindjee, Govindjee; Tripathy, Baishnab C. published the artcile< Overexpression of cytoplasmic C4 Flaveria bidentis carbonic anhydrase in C3 Arabidopsis thaliana increases amino acids, photosynthetic potential, and biomass>, Formula: C19H34O2, the main research area is cytoplasmic Flaveria bidentis Arabidopsis thaliana amino acid photosynthesis biomass; Arabidopsis thaliana ; C3 photosynthesis; C4 photosynthesis; CO2 assimilation; Photosystem I; Photosystem II; carbonic anhydrase; water-use efficiency.

An important method to improve photosynthesis in C3 crops, such as rice and wheat, is to transfer efficient C4 characters to them. Here, cytosolic carbonic anhydrase (CA: βCA3) of the C4 Flaveria bidentis (Fb) was overexpressed under the control of 35S promoter in Arabidopsis thaliana, a C3 plant, to enhance its photosynthetic efficiency. Overexpression of CA resulted in a better supply of the substrate HCO3- for the endogenous phosphoenolpyruvate carboxylase in the cytosol of the overexpressers, and increased its activity for generating malate that feeds into the tricarboxylic acid cycle. This provided addnl. carbon skeleton for increased synthesis of amino acids aspartate, asparagine, glutamate, and glutamine. Increased amino acids contributed to higher protein content in the transgenics. Furthermore, expression of FbβCA3 in Arabidopsis led to a better growth due to expression of several genes leading to higher chlorophyll content, electron transport, and photosynthetic carbon assimilation in the transformants. Enhanced CO2 assimilation resulted in increased sugar and starch content, and plant dry weight In addition, transgenic plants had lower stomatal conductance, reduced transpiration rate, and higher water-use efficiency. These results, taken together, show that expression of C4CA in the cytosol of a C3 plant can indeed improve its photosynthetic capacity with enhanced water-use efficiency.

Plant Biotechnology Journal published new progress about Amino acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Joshi, K. B.; Vijaya Krishna, K.; Verma, Sandeep published the artcile< Self-Assembled Morphologies from C2- and C3-Symmetric Biotin Conjugates>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is biotin conjugate preparation self assembly.

Synthesis and characterization of C2- and C3-sym. D-biotin conjugates has been realized, followed by the investigation of solution state self-assembly behavior of these conjugates by various microscopy techniques. Interestingly, the C2-sym. conjugate affords the formation of fibrous structures, while the C3-sym. conjugate reveals the formation of marigold flower-like spherical morphologies.

Journal of Organic Chemistry published new progress about Self-assembly. 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

Feldheim, Jonas; Kessler, Almuth F.; Feldheim, Julia J.; Schulz, Ellina; Wend, David; Lazaridis, Lazaros; Kleinschnitz, Christoph; Glas, Martin; Ernestus, Ralf-Ingo; Brandner, Sebastian; Monoranu, Camelia M.; Loehr, Mario; Hagemann, Carsten published the artcile< Effects of Long-Term Temozolomide Treatment on Glioblastoma and Astrocytoma WHO Grade 4 Stem-like Cells>, COA of Formula: C19H34O2, the main research area is glioblastoma temozolomide isocitrate dehydrogenase astrocytoma MGMT stem cell; IDH; MGMT; astrocytoma; cancer stem cells; glioblastoma; temozolomide; therapy.

Glioblastoma leads to a fatal course within two years in more than two thirds of patients. An essential cornerstone of therapy is chemotherapy with temozolomide (TMZ). The effect of TMZ is counteracted by the cellular repair enzyme O6-methylguanine-DNA methyltransferase (MGMT). The MGMT promoter methylation, the main regulator of MGMT expression, can change from primary tumor to recurrence, and TMZ may play a significant role in this process. To identify the potential mechanisms involved, three primary stem-like cell lines (one astrocytoma with the mutation of the isocitrate dehydrogenase (IDH), CNS WHO grade 4 (HGA)), and two glioblastoma (IDH-wildtype, CNS WHO grade 4) were treated with TMZ. The MGMT promoter methylation, migration, proliferation, and TMZ-response of the tumor cells were examined at different time points. The strong effects of TMZ treatment on the MGMT methylated cells were observed Furthermore, TMZ led to a loss of the MGMT promoter hypermethylation and induced migratory rather than proliferative behavior. Cells with the unmethylated MGMT promoter showed more aggressive behavior after treatment, while HGA cells reacted heterogenously. Our study provides further evidence to consider the potential adverse effects of TMZ chemotherapy and a rationale for investigating potential relationships between TMZ treatment and change in the MGMT promoter methylation during relapse.

International Journal of Molecular Sciences published new progress about Animal gene Role: BSU (Biological Study, Unclassified), PRP (Properties), BIOL (Biological Study) (IDH). 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