Month: November 2022

Comparative chemical and biological study of roots and aerial parts of Halocnemum strobilaceum growing wildly in Egypt was written by Abdel Razek, M. M. M.;Moussa, A. Y.;El-Shanawany, M. A.;Singab, A. B.. And the article was included in Journal of Pharmaceutical Sciences and Research in 2019.Safety of Methyl nonadecanoate The following contents are mentioned in the article:

Halocnemum strobilaceum is a terrestrial halophytic plant with reported folk medicinal uses. RAPD-PCR was used to amplify the DNA fragments where 83 amplified DNA fragments result from the RAPD-PCR, and primer P2 was the best sequence dominating them. GC/MS anal. identified the components of both the root and the aerial parts hexane extracts as hexadecanoic acid Me ester (38.88%) and 9-octadecenoic acid (Z)- Me ester (23.25%) in the former and dodecane (9.83%), heptadecane (8.26%) and octadecane (8.2%) in the latter. MTT cell viability assay was carried out on three different human cell lines, MCF-7, Hep-G2 and Caco-2, to evaluate the cytotoxic potential of H. strobilaceum; furthermore, the cup well diffusion and serial dilution methods were utilized to screen for the anti-infective potential. Marked activity was recorded for the aerial part against the MCF-7 cell line after 24h, 48h and 72h, with IC50 values of 227.40, 184.45 and 135.68 μg/mL, resp., and moderate cell killing effect was manifested by the root part with IC50 values of 341.98, 308.77 and 218.99 μg/mL. H. strobilaceum root extract exhibits significant effect against Bacillus subtilis and Staphylococcus aureus, with MIC values of 6.25 and 50 μg/mL resp. H. strobilaceum is a promising candidate for further future biol. studies. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Safety of Methyl nonadecanoate).

Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Safety of Methyl nonadecanoate

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

Nanoporous Membranes of Densely Packed Carbon Nanotubes Formed by Lipid-Mediated Self-Assembly was written by Voegele, Martin;Koefinger, Juergen;Hummer, Gerhard. And the article was included in ACS Applied Bio Materials.Computed Properties of C39H76NO8P The following contents are mentioned in the article:

Nanofiltration technol. faces the competing challenges of achieving high fluid flux through uniformly narrow pores of a mech. and chem. stable filter. Supported dense-packed 2D-crystals of single-walled carbon nanotube (CNT) porins with ~1 nm wide pores could, in principle, meet these challenges. However, such CNT membranes cannot currently be synthesized at high pore d. Here, we use computer simulations to explore lipid-mediated self-assembly as a route toward densely packed CNT membranes, motivated by the analogy to membrane-protein 2D crystallization In large-scale coarse-grained mol. dynamics (MD) simulations, we find that CNTs in lipid membranes readily self-assemble into large clusters. Lipids trapped between the CNTs lubricate CNT repacking upon collisions of diffusing clusters, thereby facilitating the formation of large ordered structures. Cluster diffusion follows the Saffman-Delbrduck law and its generalization by Hughes, Pailthorpe, and White. On longer time scales, we expect the formation of close-packed CNT structures by depletion of the intervening shared annular lipid shell, depending on the relative strength of CNT-CNT and CNT-lipid interactions. Our simulations identify CNT length, diameter, and end functionalization as major factors for the self-assembly of CNT membranes. This study involved multiple reactions and reactants, such as (2R,9Z)-1-(((2-Aminoethoxy)(hydroxy)phosphoryl)oxy)-3-(palmitoyloxy)propan-2-yl oleate (cas: 26662-94-2Computed Properties of C39H76NO8P).

(2R,9Z)-1-(((2-Aminoethoxy)(hydroxy)phosphoryl)oxy)-3-(palmitoyloxy)propan-2-yl oleate (cas: 26662-94-2) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Computed Properties of C39H76NO8P

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

Concerning synthesis of new biobased polycarbonates with curcumin in replacement of bisphenol A and recycled diphenyl carbonate as example of circular economy was written by De Leo, Vincenzo;Casiello, Michele;Deluca, Giuseppe;Cotugno, Pietro;Catucci, Lucia;Nacci, Angelo;Fusco, Caterina;D’Accolti, Lucia. And the article was included in Polymers (Basel, Switzerland) in 2021.COA of Formula: C13H10O3 The following contents are mentioned in the article:

Curcumin (CM) is a natural polyphenol well-known for its antioxidant and pharmaceutical properties, that can represent a renewable alternative to bisphenol A (BPA) for the synthesis of bio-based polycarbonates (PC). In the presented strategy, preparation of the CM-based PC was coupled with chem. recycling of the fossil-based BPA polycarbonate (BPA-PC) conducting a two-steps trans-polymerization that replaces BPA monomer with CM or its tetrahydrogenated colorless product (THCM). In the first step of synthetic strategy, depolymerization of com. BPA-PC was carried out with phenol as nucleophile, according to our previous procedure based on zinc derivatives and ionic liquids as catalysts, thus producing quant. di-Ph carbonate (DPC) e BPA. In the second step, DPC underwent a melt transesterification with CM or THCM monomers affording the corresponding bio-based polycarbonates, CM-PC and THCM-PC, resp. THCM was prepared by reducing natural bis-phenol with cyclohexene as a hydrogen donor and characterized by 1H-NMR and MS techniques. Polymerization reactions were monitored by IR spectroscopy and average mol. weights and dispersity of the two biobased polymers THCM-PC and CM-PC were determined by means of gel permeation chromatog. (GPC). Optical properties of the prepared polymers were also measured. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0COA of Formula: C13H10O3).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.COA of Formula: C13H10O3

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

CuAAC mediated synthesis of cyclen cored glycodendrimers of high sugar tethers at low generation was written by Agrahari, Anand K.;Jaiswal, Manoj K.;Yadav, Mangal S.;Tiwari, Vinod K.. And the article was included in Carbohydrate Research in 2021.SDS of cas: 604-69-3 The following contents are mentioned in the article:

Glycodendrimers are receiving considerable attention to mimic a number of imperative features of cell surface glycoconjugate and acquired excellent relevance to a wide domain of investigations including medicine, pharmaceutics, catalysis, nanotechnol., carbohydrate-protein interaction, and moreover in drug delivery systems. Toward this end, an expeditious, modular, and regioselective triazole-forming CuAAC click approach along with double stage convergent synthetic method was chosen to develop a variety of novel chlorine-containing cyclen cored glycodendrimers of high sugar tethers at low generation of promising therapeutic potential. We developed a novel chlorine-containing hyper-core unit with 12 alkynyl functionality originated from cyclen scaffold which was confirmed by its single crystal X-ray data anal. Further, the modular CuAAC technique was utilized to produce a variety of novel 12-sugar coated (G₀) glycodendrimers with β-Glc-, β-Man-, β-Gal-, β-Lac, along with 36-galactose coated (G₁) glycodendrimer in good-to-high yield. The structures of the developed glycodendrimer architectures have been well elucidated by extensive spectral anal. including NMR (¹H & ¹³CNMR), HRMS, MALDI-TOF MS, UV-Vis, IR, and SEC (Size Exclusion Chromatogram) data. This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3SDS of cas: 604-69-3).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.SDS of cas: 604-69-3

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

Optimization of oil yield of Phaleria macrocarpa seed using response surface methodology and its fatty acids constituents was written by Azmir, J.;Zaidul, I. S. M.;Rahman, M. M.;Sharif, K. M.;Sahena, F.;Jahurul, M. H. A.;Mohamed, A.. And the article was included in Industrial Crops and Products in 2014.Application In Synthesis of Methyl nonadecanoate The following contents are mentioned in the article:

Phaleria macrocarpa (Mahkota dewa) seed was examined to determine the optimal conditions of oil yield by solvent extraction method using n-hexane as extracting solvent. Response surface methodol. (RSM) was employed to describe explicitly the influence of extraction time, temperature and solvent-to-feed ratio on the yield of oil using central composite design (CCD). The linear, quadratic and interaction terms of the studied variables have significant (P < 0.05) effect on the oil yield. The temperature of 72 °C, extraction time of 8.4 h and solvent-to-feed ratio of 10.9 mL/g were the optimal conditions for seed oil extraction The maximum oil yield was 55.32 g/100 g dry weight under these optimal conditions. Main chem. constituents of oil were determined by Gas chromatog.-mass spectroscopy (GC-MS) and Fourier transform IR spectroscopy (FTIR). Twelve components were identified by GC-MS anal. after formation of fatty acid Me ester (FAME). Total saturated fatty acids were 19.38% whereas monounsaturated fatty acids and polyunsaturated fatty acids were 44.23% and 36.38%, resp. Oleic acid, 18:1 (43.56%) and linoleic acid, 18:2 (36.25%) were the main fatty acid constituents of Mahkota dewa seed oil. The quantity of unsaturated fatty acids was higher than saturated fatty acids in P. macrocarpa seed oil. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Application In Synthesis of Methyl nonadecanoate).

Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Application In Synthesis of Methyl nonadecanoate

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

Continuous biodiesel production in a helicoidal reactor using ultrasound-assisted transesterification reaction of waste cooking oil was written by Delavari, Armin;Halek, Farah;Amini, Mohammad. And the article was included in Clean Technologies and Environmental Policy in 2015.Formula: C20H40O2 The following contents are mentioned in the article:

Designing of a continuous biodiesel production system from waste cooking oil with ultrasonic homogenizer assistant through transesterification reaction was studied. Through some pre-tests based on cavitation phenomenon to accelerate the transesterification reaction, two types of reactors (batch and continuous) were used. GC-MS results showed the total content of 94.2 % of Me esters derived from different fatty acids formed in a batch reactor using a magnetic stirrer and an elec. heater. These results were then compared to those of two ultrasonic homogenizers with low and high capacities of 400 and 1,500 W, which tested successfully under mild conditions. The results indicated the advantages of using ultrasonic homogenizer. The continuous system consisted of a 1,500 W ultrasonic homogenizer and glass helicoidal reactor with a tube length of 20 m. This set-up was kept submerged in a hot water bath. As a result, the reaction time decreased to 150 s, the methanol/oil molar ratio was 8.6 and the weight % of NaOH/oil was 0.5 %. After separation of undesired contents, the phys. and chem. characteristics of the final product were measured according to ASTM standard methods. Study of performance of the system also showed a significant improvement in yield of the reaction (90 %) compared to prior studies. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Formula: C20H40O2).

Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Formula: C20H40O2

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

Water whitening of solvent-cast thermoplastic polyhydroxyether thin films was written by Maples, Austin L.;Ferguson, Richard C.;Williams, Eric B.;Peterson, Robert;Delatte, David E.;Rawlins, James W.. And the article was included in Proceedings of the Annual International Waterborne, High-Solids, and Powder Coatings Symposium in 2018.Product Details of 763-69-9 The following contents are mentioned in the article:

System and conditionally specific water whitening of model epoxy corrosion control coatings were studied using thermoplastic polyhydoxyether films via UV – visible spectroscopy, attenuated total reflectance – fourier transform IR (ATR-FTIR) spectroscopy, differential scanning calorimetry, SEM, and internal stress measurements to quantify the size/spatial and material performance differences between controlled film variables. The void content and the corresponding reduction in light transmission was evaluated of the chem.-same polymers with differing mol. weights, which varied by the residual solvent concentration and composition in the film. Internal stress measurements yielded distinctly different profiles between annealing and exposure cycles and were mol. weight dependent and represent differences in material characteristics possible in all coatings materials. ATR-FTIR was utilized to compare water breakthrough times in relation to both mol. weight and residual solvent content. Greater solvent content resulted in an increase in water whitening and observed void formation and growth within the film. Lower mol. weight polymers exhibited these changes earlier in time, greater size and quantity vs. conditions and to a greater extent than films comprised of higher mol. weight, chem.-same polymers. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Product Details of 763-69-9).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Product Details of 763-69-9

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

Study on pyrolysis products characteristics of medical waste and fractional condensation of the pyrolysis oil was written by Fang, Shuqi;Jiang, Luyao;Li, Pan;Bai, Jing;Chang, Chun. And the article was included in Energy (Oxford, United Kingdom) in 2020.Recommanded Product: 2-Ethylhexyl benzoate The following contents are mentioned in the article:

The dried and pulverized medical solid waste was pyrolyzed at 500 °C, and the components and characteristics were analyzed after the solid, liquid and gas products were collected resp. Exptl. results showed that the combustible component in the obtained gas product accounted for 83.22% and the heat value was 10,995.02kcal/Nm3. The liquid product obtained was black viscous tar with a heat value of 8972.82 kcal/kg, GC/MS anal. indicated that hydrocarbons and lipids accounted for about 60% of liquid product, and the carbon chain length of the products is C6-C28. The carbon content of solid product after purification was up to 63.13%, and the heat value was 5454.54 kcal/kg. Furthermore, in order to make the most of the pyrolysis oil, the liquid product was separated and purified by fractional condensation under the condition of decompression. The effect of process parameters such as vacuum degree and condensing temperature was emphasized, and the optimum technol. condition was obtained as follows: vacuum degree 0.04 MPa, heating temperature 140 °C and the first stage condensing temperature was 70 °C. Finally, the viscosity measurement of the residual high-viscosity components was intended to provide data support for the solution of tar plugging equipment and piping problems in practical applications. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Recommanded Product: 2-Ethylhexyl benzoate).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Recommanded Product: 2-Ethylhexyl benzoate

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

Magnetic graphene based dispersive micro-solid-phase extraction coupled with liquid chromatography-tandem quadrupole mass spectrometry for analysis of nine non-steroidal anti-inflammatory drugs in livestock and poultry meat was written by Dong, Chanchan;Hu, Yanyun;Lu, Yaning;Song, Wei;Han, Fang;Zheng, Ping;Deng, Ning. And the article was included in Sepu in 2016.Product Details of 5003-48-5 The following contents are mentioned in the article:

A novel anal. method was developed for the determination of nine non-steroidal anti-inflammatory drugs (NSAIDs) in meat samples by magnetic graphene nanocomposite (Fe₃O₄-G) based on dispersive micro-solid-phase extraction (μ-SPE) coupled with liquid chromatog.-mass spectrometry detection. Samples were homogenized and extracted with acidified acetonitrile. After defatting with the high speed frozen centrifugation, the sample solutions were defatted with n-hexane followed by μ-SPE. Some important parameters influencing the extraction efficiency including the extraction time, the pH value of sample solution and the elution conditions were optimized. The limits of detection (LODs, S/N = 3) of the nine NSAIDs ranged from 0.2 to 8.2 μg/kg, and the limits of quantification (LOQs, S/N = 10) ranged from 0.5 to 25.4 μg/kg. The average recoveries were 83.3%-104.5% with the relative standard deviations between 1.2% and 6.8% obtained from samples spiked at LOQ, 2LOQ and 10LOQ levels. Compared with Sep-Pak Vac NH₂ and Oasis HLB cartridges, Fe₃O₄-G had excellent purification effect, high loading amounts and good reusability. The results demonstrate that the method provide a novel pretreatment technique for the determination of NSAID residues in meat samples. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Product Details of 5003-48-5).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Product Details of 5003-48-5

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

Intrinsic role of pH in altering catalyst properties of NiMoP over alumino-silicate for the vapor phase hydrodeoxygenation of methyl heptanoate was written by Ramesh, Arumugam;Tamizhdurai, Perumal;Suthagar, Krishnan;Sureshkumar, Kandhasamy;Theres, Gubert Sonia;Shanthi, Kannan. And the article was included in New Journal of Chemistry in 2019.Formula: C8H16O2 The following contents are mentioned in the article:

Monometallic and bimetallic Ni₂P, MoP, and NiMoP active species were successfully impregnated on thermally stable, high surface area mesoporous alumino-silicate with an Si/Al ratio of 10 at room temperature via a facile wet impregnation method under both acidic and basic conditions using HCl and NH₄OH as pH regulators, resp. Furthermore, the intrinsic role of pH in altering the physicochem. properties of the catalysts was comprehensively evaluated. The catalysts were tested in a high-pressure stainless steel fixed bed reactor at different temperatures ranging from 275-350°, under 10-40 bar hydrogen pressure for the hydrodeoxygenation (HDO) of Me heptanoate. The reaction pathway and product distribution of Me heptanoate were manifested at different temperatures and pressures. The HDO activity and synergistic factor were found to be remarkably higher for the NiMoP/MAS (10)-A catalyst than the NiMoP/MAS (10)-B catalyst and its monometallic counterparts. This investigation proves that the NiMoP/MAS (10)-A catalyst is a promising catalyst for green fuel production from nonedible oils through hydrodeoxygenation. It was also unequivocally confirmed that the catalytic process does not suffer from any mass transfer resistance; thus, making the scaling up of the reaction more feasible. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Formula: C8H16O2).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Formula: C8H16O2

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