Month: November 2022

Murphy, Nicie Conley; Compton, Robert N.; Pagni, Richard M. published the artcile< Effect of Chiral and Achiral Perturbations on the Crystallization of 4,4'-Dimethylchalcone from Ethyl Acetate>, HPLC of Formula: 112-63-0, the main research area is beta radiolysis polarized light effect crystallization methylchalcone; optical activity achiral mol manipulation synthetic photochem method; chiral achiral perturbation effect crystallization methylchalcone Et acetate.

4,4′-Dimethylchalcone is an achiral mol. that crystallizes from Et acetate in the chiral space group P212121. The authors report the effect of β-radiolysis and circularly and linearly polarized light on the crystallization of 4,4′-dimethylchalcone from Et acetate. Exposure of the evaporating solution to energetic β-particles from a Sr-90 source generated a random distribution of (+) and (-) crystals. Irradiation of the evaporating solution by intense right- or left-circularly polarized light (1064 nm) from a Nd:YAG laser afforded results that were comparable to the results of the β-radiolysis experiments Linearly polarized light (LPL), on the other hand, had a profound influence on the distribution of crystals, yielding in this instance a large bifurcation of (+) and (-) crystals. A likely cause of this outcome may be due to the optical Kerr effect. The anisotropic polarizability of the chalcone mol. causes a preferential alignment in the direction of the E field when using LPL. This mol. alignment results in a sizable enantiomeric excess. Circularly polarized light does not produce the alignment of the chalcone and thus has no effect on the asym. induction. This alignment offers an opportunity for chirally autocatalytic secondary nucleation to occur, which is then able to amplify small initial asymmetry in the number of (+) and (-) crystals. The chirality of the chalcone crystals was determined via their reaction in water with pyridinium tribromide to yield the chiral compound erythro-1,2-dibromo-4,4′-dimethylchalcone, thus allowing the chirality of the crystal to be propagated to mol. chirality.

Crystal Growth & Design published new progress about Chirality. 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

Fernandez-Alvarez, Ana J.; Thomas, Maria Gabriela; Pascual, Malena L.; Habif, Martin; Pimentel, Jeronimo; Corbat, Agustin A.; Pessoa, Joao P.; La Spina, Pablo E.; Boscaglia, Lara; Plessis, Anne; Carmo-Fonseca, Maria; Grecco, Hernan E.; Casado, Marta; Boccaccio, Graciela L. published the artcile< Smaug1 membrane-less organelles respond to AMPK and mTOR and affect mitochondrial function>, Category: esters-buliding-blocks, the main research area is smaug membrane less organelle AMPK mTOR affect mitochondrial function; AMPK; Membrane-less organelles; Metformin; Mitochondria; Processing bodies; Smaug; UQCRC1.

Smaug is a conserved translational regulator that binds numerous mRNAs, including nuclear transcripts that encode mitochondrial enzymes. Smaug orthologs form cytosolic membrane-less organelles (MLOs) in several organisms and cell types. We have performed single-mol. fluorescence in situ hybridization (FISH) assays that revealed that SDHB and UQCRC1 mRNAs associate with Smaug1 bodies in U2OS cells. Loss of function of Smaug1 and Smaug2 (also known as SAMD4A and SAMD4B, resp.) affected both mitochondrial respiration and morphol. of the mitochondrial network. Phenotype rescue by Smaug1 transfection depends on the presence of its RNA-binding domain. Moreover, we identified specific Smaug1 domains involved in MLO formation, and found that impaired Smaug1 MLO condensation correlates with mitochondrial defects. Mitochondrial complex I inhibition upon exposure to rotenone, but not strong mitochondrial uncoupling upon exposure to CCCP, rapidly induced the dissolution of Smaug1 MLOs. Metformin and rapamycin elicited similar effects, which were blocked by pharmacol. inhibition of AMP-activated protein kinase (AMPK). Finally, we found that Smaug1 MLO dissolution weakens the interaction with target mRNAs, thus enabling their release. We propose that mitochondrial respiration and the AMPK-mTOR balance controls the condensation and dissolution of Smaug1 MLOs, thus regulating nuclear mRNAs that encode key mitochondrial proteins.

Journal of Cell Science published new progress about Cell morphology. 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

Lotierzo, Andrea; Longbottom, Brooke W.; Lee, Wai Hin; Bon, Stefan A. F. published the artcile< Synthesis of Janus and Patchy Particles Using Nanogels as Stabilizers in Emulsion Polymerization>, Quality Control of 3290-92-4, the main research area is Janus patchy particle nanogel stabilizer emulsion polymerization; Janus; emulsion polymerization; interface; nanogels; patchy particles; polymer colloids.

Polymer nanogels are used as colloidal stabilizers in emulsion polymerization The nanogels were made by the covalent crosslinking of block copolymer micelles, the macromol. building blocks of which were synthesized using a combination of catalytic chain transfer emulsion polymerization and reversible addition-fragmentation chain transfer (RAFT) of methacrylate monomers. The use of the nanogels in an emulsion polymerization led to anisotropic Janus and patchy colloids, where a latex particle was decorated by a number of patches on its surface. Control of the particle size and patch d. was achieved by tailoring of the reaction conditions, such as varying the amount of nanogels, pH, and salt concentration Overall, the emulsion polymerization process in the presence of nanogels as stabilizers is shown to be a versatile and easily scalable route toward the fabrication of Janus and patchy polymer colloids.

ACS Nano published new progress about Chain transfer. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Quality Control of 3290-92-4.

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

Halloran, Matthew W.; Nicell, Jim A.; Leask, Richard L.; Maric, Milan published the artcile< Small molecule plasticizers for improved migration resistance: Investigation of branching and leaching behaviour in PVC blends>, Computed Properties of 112-63-0, the main research area is plasticizer PVC composite leaching mech thermal property.

The influence of branching on plasticizer effectiveness and migration behavior of heptyl-succinate plasticizers blended with poly(vinyl chloride) (PVC) was evaluated. An increase of branching led to a decrease in migration of the plasticizers into both hexanes and vegetable oil medias. Addnl., a quant. 1H NMR method was used to identify plasticizer concentration in the leachates and compared to a gravimetric standard test method. Overall, the quant. 1H NMR method proved to be a more direct method to assess leaching. In comparison to com. plasticizer di(2-ethylhexyl) phthalate (DEHP) and alternative plasticizer diheptyl succinate (DHPS), all of the branched species displayed superior migration resistance into hexanes (two to ten-fold). The glass transition temperatures and stress at break data indicated that the plasticizers comprised of up to three branches functioned as well as, or better than DEHP and DHPS. However, there was a decrease in plasticizer efficiency with compounds comprised of four or more branches.

Materials Today Communications published new progress about Elongation at break. 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

Kozik, Violetta; Bak, Andrzej; Pentak, Danuta; Hachula, Barbara; Pytlakowska, Katarzyna; Rojkiewicz, Marcin; Jampilek, Josef; Sieron, Karolina; Jazowiecka-Rakus, Joanna; Sochanik, Aleksander published the artcile< Derivatives of graphene oxide as potential drug carriers>, Recommanded Product: Dimethyl 2,2′-azanediyldiacetate hydrochloride, the main research area is graphene oxide potential drug carrier.

Chem. functionalized graphene oxides could be used as novel drug carriers. Covalent alterations of graphene oxides lead to surface changes via formation of chem. bonding while non-covalent ones involve van der Waals forces, hydrogen bonding, and π-π stacking interactions. Covalent modifications appear to be superior as they can yield compounds with desired properties and carriers prepared by other methods are less stable. Synthesis of graphene oxide-iminodiacetic acid and graphene oxide-glycine involves nucleophilic substitution of graphene oxide nanoparticles with iminodiacetic acid or glycine. As the first step, iminodiacetic acid or glycine were transformed into iminodiacetic acid or glycine Me ester hydrochlorides, resp., for C-terminus protection. The obtained product, activated in situ, was then used to form amide bonds between graphene oxide and iminodiacetic acid or glycine.

Journal of Nanoscience and Nanotechnology published new progress about Amide group. 39987-25-2 belongs to class esters-buliding-blocks, and the molecular formula is C6H12ClNO4, Recommanded Product: Dimethyl 2,2′-azanediyldiacetate hydrochloride.

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

Nakamura, Seikou; Kozuka, Mutsuo; Bastow, Kenneth F.; Tokuda, Harukuni; Nishino, Hoyoku; Suzuki, Madoka; Tatsuzaki, Jin; Morris Natschke, Susan L.; Kuo, Sheng-Chu; Lee, Kuo-Hsiung published the artcile< Cancer preventive agents, Part 2: Synthesis and evaluation of 2-phenyl-4-quinolone and 9-oxo-9,10-dihydroacridine derivatives as novel antitumor promoters>, Application of C9H9NO4, the main research area is antitumor quinolone acridine derivative preparation SAR.

2-Phenyl-4-quinolone and 9-oxo-9,10-dihydroacridine derivatives were synthesized and screened as potential antitumor promoters by examining the ability of the compounds to inhibit Epstein-Barr virus early antigen (EBV-EA) activation induced by the tumor promoter 12-O-tetradecanoylphorbol-13-acetate (TPA) in Raji cells. Interestingly, compounds 14, 15, and 17 showed similar inhibitory effects (89-92%, 66-69%, and 24-29% at 1000, 500, and 100 mol ratio to TPA, resp.) against EBV-EA with potencies comparable to those of glycyrrhetic acid, a known natural antitumor-promoter.

Bioorganic & Medicinal Chemistry published new progress about Antitumor agents. 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Application of C9H9NO4.

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

Kasper, Karl; Abreu, Ilka N.; Feussner, Kirstin; Zienkiewicz, Krzysztof; Herrfurth, Cornelia; Ischebeck, Till; Janz, Dennis; Majcherczyk, Andrzej; Schmitt, Kerstin; Valerius, Oliver; Braus, Gerhard H.; Feussner, Ivo; Polle, Andrea published the artcile< Multi-omics analysis of xylem sap uncovers dynamic modulation of poplar defenses by ammonium and nitrate>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is ammonium nitrate xylem sap dynamic modulation multiomic analysis; carbohydrates; metabolomics; nitrogen; phytohormones; proteomics; salicinoids.

Xylem sap is the major transport route for nutrients from roots to shoots. In the present study, we investigated how variations in nitrogen (N) nutrition affected the metabolome and proteome of xylem sap and the growth of the xylem endophyte Brennaria salicis, and we also report transcriptional re-wiring of leaf defenses in poplar (Populus 3 canescens). We supplied poplars with high, intermediate or low concentrations of ammonium or nitrate. We identified 288 unique proteins in xylem sap. Approx. 85% of the xylem sap proteins were shared among ammonium- and nitrate-supplied plants. The number of proteins increased with increasing N supply but the major functional categories (catabolic processes, cell wallrelated enzymes, defense) were unaffected. Ammonium nutrition caused higher abundances of amino acids and carbohydrates, whereas nitrate caused higher malate levels in xylem sap. Pipecolic acid and N-hydroxypipecolic acid increased, whereas salicylic acid and jasmonoyl-isoleucine decreased, with increasing N nutrition. Untargeted metabolome analyses revealed 2179 features in xylem sap, of which 863 were differentially affected by N treatments. We identified 124 metabolites, mainly from specialized metabolism of the groups of salicinoids, phenylpropanoids, phenolics, flavonoids, and benzoates. Their abundances increased with decreasing N, except coumarins. Brennaria salicis growth was reduced in nutrient-supplemented xylem sap of low- and high- NO3–fed plants compared to that of NH4+-fed plants. The drastic changes in xylem sap composition caused massive changes in the transcriptional landscape of leaves and recruited defenses related to systemic acquired and induced systemic resistance. Our study uncovers unexpected complexity and variability of xylem composition with consequences for plant defenses.

Plant 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, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Zhang, Han-Ming; Jia, Wen-Qiang; Liang, Zhi-Qin; Ye, Song published the artcile< N-Heterocyclic carbene-catalyzed [3+3] cyclocondensation of bromoenals and ketimines: highly enantioselective synthesis of dihydropyridinones>, Reference of 112-63-0, the main research area is benzoisothiazolopyridinone pyridinone dihydro enantioselective synthesis; enal bromo enantioselective cyclocondensation ketimine triazolium salt catalyst.

The N-heterocyclic carbene-catalyzed enantioselective [3+3] cyclocondensation of bromoenals and cyclic/acyclic ketimines gives the corresponding chiral dihydropyridinones I (R1 = n-Pr, Ph, 3-ClC6H4, 4-MeC6H4, etc.; R2 = H, n-Pr, Ph) and II (R1 = Ph, 4-ClC6H4, 2-MeOC6H4, etc.; R2 = H, Me; R3 = Ph, 2-ClC6H4, thiophen-2-yl, etc.) in high yields with high enantioselectivity.

Asian Journal of Organic Chemistry published new progress about Aldehydes, halo Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Schultz, Terry W.; Hewitt, Mark; Netzeva, Tatiana I.; Cronin, Mark T. D. published the artcile< Assessing applicability domains of toxicological QSARs: definition, confidence in predicted values, and the role of mechanisms of action>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is modeling predictive toxicity QSAR Tetrahymena aromatic compound.

There are many issues relating to the use of Quant. Structure – Activity Relationships (QSARs) to make predictions for regulatory purposes. Among those issues, characterization of models and the development of suitable tools to determine applicability domains rank as the more important. With regard to aquatic toxicol., QSARs for acute effects (e.g., IGC50-1) often take the form of a hydrophobic [i.e., Logarithm of the 1-Octanol/Water Partition Coefficient (log P)]-electrophilic [e.g., Maximum Acceptor Superdelocalizability (Amax)]-dependent, regression-based model. In this study, the applicability domain of a model for the toxicity of aromatic compounds to Tetrahymena pyriformis [log (IGC50-1) = 0.545(0.015) log P + 16.2(0.62) Amax-5.91(0.20); n = 384, r2 (adj) = 0.859, r2(pred) = 0.856, s = 0.275, F = 1163, Pr > F = 0.0001] was assessed. The structural and physicochem. domains of the model were characterized using two test sets of toxicity data (one prescreened to be within the descriptor space and structural domain of the training set and the other to be outside the structural domain of the training set). For test set compounds inside the domain of the model, there was no relationship between absolute residue values for predictions and hydrophobicity; however, there was a linear relationship between absolute residue values and electrophilicity. It was concluded that predictivity in the region of the domain associated with higher electrophilicity, greater potency, and derivatives containing both halo- and nitro-groups is poorer than elsewhere in the domain, and therefore less confidence should be given to those values. Compounds in this region of the domain of the model are associated with the soft-, or pro-electrophilic mechanisms of toxic action. For the second test set, i.e., derivatives outside the structural domain, an examination of absolute residue values revealed that the observed toxicity is typically in excess of that predicted, especially for compounds in the structural space(s) of well-known electrophilic mechanisms of reactive toxicity. Caution is therefore urged in using statistical approaches to account for, and apply confidence to predictions from the applicability domain. An appreciation of the mechanism of toxicity appears to be critical to the determination of the most likely applicability domain.

QSAR & Combinatorial Science published new progress about Aquatic toxicity. 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

Kim, Hichul; El-Khoury, Victoria; Schulte, Nadine; Zhan, Tianzuo; Betge, Johannes; Cousin, Loic; Felli, Emanuele; Pessaux, Patrick; Ogier, Arnaud; Opitz, Oliver; Ku, Bosung; Ebert, Matthias P.; Kwon, Yong-Jun published the artcile< Personalized functional profiling using ex-vivo patient-derived spheroids points out the potential of an antiangiogenic treatment in a patient with a metastatic lung atypical carcinoid>, Product Details of C19H34O2, the main research area is human metastatic lung atypical carcinoid spheroid bevacizumab capecitabine; Personalized functional profiling; antiangiogenic therapy; drug screening; lung carcinoid; neuroendocrine tumors; personalized medicine; pharmacotyping; precision medicine; spheroids.

Lung carcinoids are neuroendocrine tumors representing 1 to 2% of lung cancers. This study outlines the case of a patient with a metastatic lung atypical carcinoid who presented with a pleural effusion and progression of liver metastases after developing resistance to conventional treatments. Personalized functional profiling (PFP), i.e. drug screening, was performed in ex-vivo spheroids obtained from the patient liver metastasis to identify potential therapeutic options. The drug screening results revealed cediranib, an antiangiogenic drug, as a hit drug for this patient, from a library of 66 Food and Drug Administration (FDA)-approved and investigational drugs. Based on the PFP results and the reported evidence of clin. efficacy of bevacizumab and capecitabine combination in gastro-intestinal neuroendocrine tumors, this combination was given to the patient. Four months later, the pleural effusion and pleura carcinosis regressed and the liver metastasis did not progress. The patient experienced 2 years of a stable disease under the PFP-guided personalized treatment.

Cancer Biology & Therapy published new progress about Antiangiogenic agents. 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