Month: November 2022

Santosh, Mada SSNM; Sadavarte, Vaibhav S.; Kumar, Amit; Pande, Shrikant M.; Kulkarni, Prashant S. published the artcile< Examining the Effect of Trimethylol Propane Crosslinker on Butanetriol Trinitrate Plasticized Polycaprolactone Polymer Networks of Propellant Binder System>, Computed Properties of 112-63-0, the main research area is trimethylol propane crosslinker butanetriol trinitrate plasticize polycaprolactone; polymer propellant binder system.

The knowledge of polymer network characteristics is important to tune the properties of advanced energetic propellants based on nitrate ester plasticized polyol binder system. In this article, plasticized polyurethane networks of polycaprolactone (PCP) and hydroxyl-terminated polybutadiene (HTPB) with different crosslinker content [0 to 0.20 parts] at various stoichiometric NCOOH ratios (r-value) [0.8 to 1.0] were studied. Five numbers of polyurethane networks of 1,2,4-butanediol trinitrate (BTTN) plasticised PCP were formulated at each r value 0.8, 0.9 and 1.0 using 0, 0.05, 0.10, 0.15 and 0.20 parts of trimethylolpropane (TMP) crosslinker. Similarly, five numbers of dioctyl adipate (DOA) plasticized HTPB based polyurethane networks were formulated at r-value of 0.8. FT-IR spectra of these polyurethane networks (PUNs) were recorded for functional group identification. Stress-strain behavior of PUNs was studied for understanding the effect of TMP content and r value on mech. properties. Hard segment content of PUNs were calculated and its influence on network characteristics and mech. properties was evaluated. CLD values (ν) increased with increase of hard segment content of PUN and the values quantified by different approaches followed the trend νe (by solvent swelling method) > νne2(by Initial modulus method)>νne1 (by Mooney Rivlin method).

Propellants, Explosives, Pyrotechnics published new progress about Binders. 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

Torabi, Mostafa; Yaghoobi, Fatemeh; Karimi Shervedani, Reza; Kefayat, Amirhosein; Ghahremani, Fatemeh; Rashidiyan Harsini, Parisa published the artcile< Mn(II) & Gd(III) deferrioxamine complex contrast agents & temozolomide cancer prodrug immobilized on folic acid targeted graphene/polyacrylic acid nanocarrier: MRI efficiency, drug stability & interactions with cancer cells>, Computed Properties of 112-63-0, the main research area is temozolomide cancer folic acid graphene deferrioxamine complex drug stability.

Nanocomposite systems, consisting of the reduced graphene oxide/polyacrylic acid as nanocarrier, integrated with folic acid targeting agent and further modified by Deferrioxamine-M (M: Mn2+ or Gd3+) as the diagnostic MRI contrast agents or Temozolomide as a therapeutic agent, abbreviated as (i) GNs@PAA-[DFO-Mn(II)]/FOA, (ii) GNs@PAA-[DFO-Gd(III)]/FOA, and (iii) GNs@PAA-FOA/TMZ, were synthesized, characterized, and examined for B16F10 Melanoma cells through in-vitro/in-vivo methods. Physicochem. characterization of the prepared systems was performed by using DLS, ζ-potential, TEM, FTIR, UV-vis, XPS, fluorescence, and electrochem. methods. The biocompatibility of the nanocarrier was implicated according to the histopathol. evaluation of the H&E stained sections of vital organs. Release studies at biol. pH 7.4, revealed good stability for TMZ immobilized on the GNs@PAA-FOA/TMZ nanocarrier. The in-vitro MRI studies of the GNs@PAA-[DFO-Mn(II)]/FOA and GNs@PAA-[DFO-Gd(III)]/FOA systems revealed longitudinal relaxivities of 13.00 and 20.64 mM-1 s-1, using variations of the spin-lattice relaxation rates (r1 = 1/T1) as a function of the systems concentrations, resp. These systems were studied further by the in-vivo method. The obtained images supported their ability for MRI imaging. The intracellular delivery of the system was monitored and supported by flow cytometry based on PI florescent dye loaded onto the introduced nanocarrier, GNs@PAA-FOA/PI. The interaction of the GCE-GNs@PAA-FOA/TMZ, GCE-GNs@PAA-[DFO-Mn(II)]/FOA, and GCE-GNs@PAA-[DFO-Gd(III)]/FOA systems with cancer cells was investigated through electrochem. impedance spectroscopy. The results showed a high affinity of the systems toward B16F10 Melanoma cells with the selectivity degrees of 12.96, 9.92, and 9.62, resp., compared with L929 cells.

Colloids and Surfaces, A: Physicochemical and Engineering Aspects published new progress about Antitumor 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

Banaras, Saira; Javaid, Arshad; Khan, Iqra Haider published the artcile< Bioassays guided fractionation of Ageratum conyzoides extract for the identification of natural antifungal compounds against Macrophomina phaseolina>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is octadecanal heptadecanol chloroform extract Ageratum antifungal agent Macrophomina.

Macrophomina phaseolina (Tassi) Goid. is a soil-borne fungal pathogen causing diseases in more than 500 plant species. The present study aimed to identify possible antifungal constituents in different parts of billygoat-weed (Ageratum conyzoides L.) through bioassays guided fractionation for the control of M. phaseolina. Extracts of different parts of the weed were made in methanol and antifungal bioassays were conducted using 1, 2, 3, 4 and 5% concentrations of the extract Stem extract caused the highest inhibition in fungal biomass (20-83%) followed by leaf extract (16-67%). Methanolic stem extract was partitioned using four organic solvents namely n-hexane, chloroform, Et acetate and n-butanol. Bioassays carried out with different concentrations (3.125, 6.25, 12.5, 25, 50, 100 and 200 mg mL-1) of the sub-fractions of stem extract revealed the highest antifungal potential of chloroform sub-fraction with 56-93% reduction in the fungal biomass followed by n-butanol, Et acetate and n-hexane sub-fractions causing 24-76%, 7-75% and 5-70% reduction in fungal biomass over control, resp. Chloroform sub-fraction with the highest antifungal potential was analyzed by GC-MS. Out of 10 compounds identified in this sub-fraction, 2H-1-benzopyran, 7-dimethoxy-2,2-dimethyl- (27.58%) was the most abundant followed by hexadecanoic acid, Me ester (18.85%); 11-octadecenoic acid, Me ester (15.28%) and 1,2-benzenedicarboxylic acid, mono(2-ethylhexyl) ester (10.88%), which could be responsible for antifungal activity.

International Journal of Agriculture and Biology published new progress about Ageratum conyzoides. 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, Juyeon; Byun, Jaewon; Han, Jeehoon published the artcile< Process integration and economics of gamma-valerolactone using a cellulose-derived ethyl levulinate intermediate and ethanol solvent>, Category: esters-buliding-blocks, the main research area is ethyl levulinate gamma valerolactone preparation.

This study combines two catalytic conversion strategies, cellulose to Et levulinate and subsequently to gamma-valerolactone, into an integrated process. The effect of integrating the cellulose-to-Et levulinate and Et levulinate-to-gamma-valerolactone processes on a com. scale is investigated to improve energy efficiency and economics by performing a process simulation study. The conversion strategies show a low energy efficiency of 6.8% using excess ethanol solvent to achieve high yields of Et levulinate and gamma-valerolactone; however, in the integrated process, 0.4% of the ethanol and 30.8% of the cellulose-to-Et levulinate heat requirements are supplied by the Et levulinate-to-gamma-valerolactone process. The min. selling price for the integrated process is estimated to be $5.63/kg gamma-valerolactone, which makes it an economically feasible option for gamma-valerolactone production Finally, we conducted a sensitivity anal. of key parameters (cellulose price, steam price, and ethanol price) highly depending on the min. selling price of gamma-valerolactone.

Energy (Oxford, United Kingdom) published new progress about Heat exchangers. 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

Zhang, Ying-Qi; Zhang, Yi-Ping; Zheng, Yan-Xin; Li, Zhao-Yang; Ye, Long-Wu published the artcile< Rapid and practical access to diverse quindolines by catalyst-free and regioselectivity-reversed Povarov reaction>, Quality Control of 252932-48-2, the main research area is quindoline preparation regioselective; arylimine dienophile Povarov reaction.

The Povarov reaction, a formal [4 + 2] cycloaddition between N-aryl imines and electron-rich dienophiles, has been defined as an efficient method to approach tetrahydroquinolines and has been well established in the past decades. In general, electron-rich heterosubstituted alkenes have served as the most popular dienophiles to achieve the exclusive regioselectivity. However, the use of Lewis acids and Bronsted acids as catalysts is required in these transformations, and, to authors knowledge, the Povarov reaction of electron-rich heterosubstituted alkynes has not been reported. Here, authors disclose a catalyst-free Povarov reaction of formyl-ynamides with anilines for the rapid and practical synthesis of a diverse range of valuable quindolines, which not only represents the first Povarov reaction of ynamides to the best of authors knowledge but also constitutes a very rare example of a catalyst-free ynamide cyclization reaction. This formal [1 + 2 + 3] annulation shows a reversed regioselectivity compared with the previous protocols.

Cell Reports Physical Science published new progress about [4+2] Cycloaddition reaction. 252932-48-2 belongs to class esters-buliding-blocks, and the molecular formula is C7H10N2O2, Quality Control of 252932-48-2.

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

Kuo, W. N.; Ganesan, U.; Robinson, A.; Flanders, J. published the artcile< Modulation of bacterial protease by peptides, phospholipids, and nucleotides>, COA of Formula: C19H34O2, the main research area is proteinase modulation peptide phospholipid nucleotide bacteria.

Various agents are tested for their effects on bacterial protease (type IX). The activity was measured by the production of folin-pos. amino acids and peptides from proteolysis. Phosphatidylethanolamine, aprotinin, and tRNA effectively stimulated the protease, whereas λ phage DNA (HindIII digest), dGTP, dCTP, GTP, TTP, dTTP, and plasmid PS62-PL DNA significantly inhibited the protease. In addition, L-α-phosphatidic acid, L-α-phosphatidylglycerol (dioleoyl), pepstatin A, palmitic acid, cardiolipin, phosphatidylserine, and MS2 RNA exerted moderate inhibition. Similar regulation of proteolysis was also confirmed by the anal. of peptide bands in SDS-PAGE.

Biochemical Archives published new progress about Bacteria. 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

Striegler, Susanne; Fan, Qiu-Hua; Rath, Nigam P. published the artcile< Binuclear copper(II) complexes discriminating epimeric glycosides and α- and β-glycosidic bonds in aqueous solution>, Related Products of 617-55-0, the main research area is crystal mol structure binuclear copper complex; binuclear copper complex preparation enzyme mimetic epimeric glycoside; aryl glycoside chemoselective glycolysis binuclear copper complex enzyme mimetic; disaccharide chemoselective glycolysis binuclear copper complex enzyme mimetic; Catalysis; binuclear copper(II) complexes; chiral; glycosides; selective hydrolysis.

Two chiral binuclear copper(II) complexes were synthesized and characterized for the first time as efficient chemoselective catalysts for the hydrolysis of aryl glycosides and disaccharides in aqueous solution at near neutral pH. Under these conditions, discrimination of epimeric aryl α-glycopyranosides was observed by both 29-fold different reaction rates and 3-fold different proficiency of the catalyst (safety note: perchlorate salts are potentially explosive). Addnl., large differentiation of the nature of α- and β-glycosidic bond in aryl glycosides as model compounds is apparent, but also noted in selected disaccharides. The influence of the chirality of the complexes and the role of the configuration of the carbohydrate upon interaction with the catalyst is discussed in detail. Lastly, a putative mechanism for the metal complex-catalyzed hydrolysis is derived from the exptl. evidence pointing at deprotonation of the hydroxyl group at C-2 as a pre-requisite for glycoside hydrolysis.

Journal of Catalysis published new progress about Bond (glycosidic). 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Related Products of 617-55-0.

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

Kim, Seong Ju; Um, Byung Hwan published the artcile< Effect of thermochemically fractionation before hydrothermal liquefaction of herbaceous biomass on biocrude characteristics>, Formula: C4H8O3, the main research area is Miscanthus kenaf phenol hydrothermal liquefaction high performance liquid chromatog.

Hydrothermal liquefaction (HTL) of fractionated two types herbaceous biomass (kenaf and miscanthus) by dilute acid, organosolv, alk., or demineralization process was carried out under ethanol water co-solvent at 350°C for 30 min to examine the biocrude yield and characteristics. The biocrude properties were comprehensively characterized by HPLC, elemental, GC-MS, and TGA anal. Fractionation technologies before HTL effectively increased biocrude yield up to 38% compared to that of untreated herbaceous biomass (31%), except for organosolv fractionation of miscanthus, especially, HTL after alk. fractionation showed high yield and energy recovery ratio up to 70%. Elemental anal. showed that HHV of biocrude was neg. affected by hydrolysis reaction of high lignin content after dilute acid fractionation. The GC-MS anal. revealed that carbohydrates-derived compound significantly increased in the biocrude obtained after organosolv and alk. fractionation due to holocellulose increases through fractionation process. Addnl., TGA results indicated that the ratio of high-boiling-point compounds in biocrude obtained after demineralization was expanded compared with untreated due to ash removal, which could act as a catalyst.

Renewable Energy published new progress about Biodiesel fuel. 623-50-7 belongs to class esters-buliding-blocks, and the molecular formula is C4H8O3, Formula: C4H8O3.

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

Williams, Davdi R.; Li, Jie published the artcile< Total synthesis of myxovirescin A1>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is myxovirescin A1 total synthesis.

Stereocontrolled synthesis of myxovirescin A1, a 28-membered macrolactam lactone, is accomplished via a highly convergent route. Ring closure to the macrocycle is realized by macro-lactamization of azido acid I using the Mukaiyama procedure.

Tetrahedron Letters published new progress about 112-63-0. 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

Alvarez-Lorenzo, Carmen; Hiratani, Haruyuki; Tanaka, Kazunori; Stancil, Kimani; Grosberg, Alexander Yu.; Tanaka, Toyoichi published the artcile< Simultaneous Multiple-Point Adsorption of Aluminum Ions and Charged Molecules by a Polyampholyte Thermosensitive Gel: Controlling Frustrations in a Heteropolymer Gel>, Formula: C19H34O2, the main research area is multiple point adsorption polyampholyte hydrogel swelling; aluminum ion adsorption polyampholyte gel.

Data on concurrent multiple point adsorption of two oppositely charged species of “”target mols.”” (aluminum ions and 1,3,6,8-pyrenetetrasulfonic sodium salt (Py-4)) by a polyampholyte gel of N-isopropylacrylamide (NIPA, 6 M) with methacrylic acid (MAA, 80 mM) and methacrylamidopropyl trimethylammonium chloride (MAPTAC, 80 mM) is reported. The goal of this study is to test the mutual frustrations created by adsorption of one species on the adsorption of the other. Understanding these frustrations is an important step toward elucidating the memory of conformations in heteropolymer systems. It was found that in the absence of aluminum, the adsorption of Py-4 was suppressed by gel collapse, presumably because of an increase in MAA/MAPTAC ionic pairs that prevents the formation of potential adsorbing centers. Adding a moderate amount of aluminum significantly enhances adsorption of Py-4 by the collapsed gel, indicating that aluminum ions compete for bonds with MAA and help release vacant MAPTAC centers. Finally, with further increase of aluminum, the Py-4 multiple point adsorption is again suppressed, pointing out the frustrations created by aluminum-mediated effective cross-links. The cooperativity of the adsorption process is also analyzed.

Langmuir published new progress about Adsorption. 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