Tag: 100-200

Characterization of acrylic copolymers applied in negative-type photoresist via a ternary composition diagram was written by Lee, Chih-Kang;Don, Trong-Ming;Lin, Dar-Jong;Chen, Chin-Chung;Cheng, Liao-Ping. And the article was included in Journal of Applied Polymer Science in 2008.Safety of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

Three-component acrylic copolymers used as a binder for neg.-type photoresists were synthesized and characterized. First, free radical polymerization was employed to synthesize two-component binders, i.e., acrylic ester copolymers with different ratios of benzyl methacrylate (BZMA) and methacrylic acid (MAA). Thermal behavior, viscosity and mol. weight of the prepared two-component binders were studied. Then, a series of three-component binders were prepared through incorporation of another monomer, 2-hydroxyethyl methacrylate (2-HEMA). FTIR was used to examine the evolution of chem. bonds at various stages of the synthetic process. Thermal analyses, TGA and DSC, were used to evaluate the level of enhancement on thermal stabilities of the prepared three-component binders. Finally, an optimal region in the ternary composition diagram of BZMA, MAA, and 2-HEMA can be identified by comparing the results of acid value, viscosity, and mol. weight of the binder. A neg.-type photoresist was prepared using an optimized composition, for which resolution of the circuit could reach the level of 6 μm. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Safety of Ethyl 3-ethoxypropanoate).

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. 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. Safety of Ethyl 3-ethoxypropanoate

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

Biodiesel production by valorizing waste non-edible wild olive oil using heterogeneous base catalyst: Process optimization and cost estimation was written by Khan, Ihtisham Wali;Naeem, Abdul;Farooq, Muhammad;Ghazi, Zahid Ali;Saeed, Tooba;Perveen, Fouzia;Malik, Tabassum. And the article was included in Fuel in 2022.Recommanded Product: 106-73-0 The following contents are mentioned in the article:

The current research investigates sustainable biodiesel production from non-edible wild olive oil via novel Na/SiO₂/TiO₂ heterogeneous catalyst. The catalyst was synthesized by Sol-Gel and wet impregnation method. Furthermore, the designed catalyst was evaluated by various spectroscopic techniques like SEM, EDX, XPS, FTIR, BET and XRD. The impact of various influencing parameters such as catalyst loading, reaction temperature, oil/methanol molar ratio and reaction time were scrutinized and the maximum 97% yield was achieved at the reaction conditions of 1:20 WOSO/MeOH molar ratio, 9 wt% catalyst loading at 70°C and 120 min of reaction time. The synthesized biodiesel was confirmed from GC-MS anal., whereas the various physiochem. properties of synthesized biodiesel were explored by ASTMD 5761 and EN 1404 methods. The plausible reaction mechanism of Na/SiO₂/TiO₂ catalyzed WOSO was also proposed. Finally, the cost estimation of the designed catalyst investigates its com. viability for low cost biodiesel production using non-edible WOSO feedstock. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Recommanded Product: 106-73-0).

Methyl heptanoate (cas: 106-73-0) 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.Recommanded Product: 106-73-0

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

Finite element analysis of molecular structure and estimation of liquid thermal conductivity of carboxylates was written by Liu, Wan-qiang;Lu, Hai-xia;Liu, Feng-ping;Chen, Guan-fan;Yue, Ming;Qiu, Ming-hua. And the article was included in Gaoxiao Huaxue Gongcheng Xuebao in 2020.Formula: C10H20O2 The following contents are mentioned in the article:

Thermal conductivity is a basic thermodn. data in chem. engineering. Carboxylates are important organic raw materials, while its thermal conductivity estimation is limited. Based on finite element anal., the natural frequency of carboxylate mol. structure was solved by vibration mechanics, and the displacement vector of each node was solved by potential energy min. principle and the charge-displacement parameter of carboxylate mol. structures was calculated by heavy at. charge of the quantum calculation method. The results show that the liquid thermal conductivity estimation model based on natural frequency of carboxylic acid ester mols., charge-displacement and temperature parameters are applicable for the correlation of 48 carboxylates of 746 liquid thermal conductivity data at different temperatures, it can also be used for the prediction of liquid thermal conductivity of carboxylates not in the training set. Compared with Sastri and Latini methods, the result shows that the error is smaller, the estimation condition is simpler, the estimation range is wider and the target mol. structure is more complex. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Formula: C10H20O2).

Octyl acetate (cas: 112-14-1) 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. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Formula: C10H20O2

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

Quadratic Modeling and Optimization of Quaternary Equilibria of Liquid-Liquid Systems of General Types, Reactive Extraction Mixtures and Aqueous Biphasic Systems was written by Senol, Aynur. And the article was included in Journal of Solution Chemistry in 2022.Quality Control of Octyl acetate The following contents are mentioned in the article:

This paper studies quadratic modeling and optimization of quaternary equilibrium of liquid-liquid systems of general types, reactive extraction mixtures and aqueous biphasic systems in order to develop an understandable basis of functionally dependent variables that govern optimal solute partitioning within the relevant system. The proposed three quadratic models (QMG, QMR and QMAB), being compatible with multilinear methodol., mimic the equilibrium properties of six test systems relatively accurately, and subsequently, are applied to globally optimizing quaternary equilibrium To remedy an appropriate optimization algorithm, the hybrid gradient method and the derivative variation method are treated and their use for tackling different problems is discussed. The problem of fair imitation of a global optimality is then addressed. The algorithmic solution is completed by the numerical results of six testing problems, being indicative of the fact that the distribution, geometric and solvatochromic properties of components are primary concern to be accounted for a reliable prediction of optimal phase equilibrium This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Quality Control of Octyl acetate).

Octyl acetate (cas: 112-14-1) 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. 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.Quality Control of Octyl acetate

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

Comprehensive identification of molecular profiles related to sensory and nutritional changes in Mongolian cheese during storage by untargeted metabolomics coupled with quantification of free amino acids was written by Zhang, Xin;Zheng, Yuanrong;Zhou, Ran;Ma, Ming. And the article was included in Food Chemistry in 2022.Recommanded Product: Octyl acetate The following contents are mentioned in the article:

Non-targeted metabolomics was used to study metabolites with low mol. weight which may contribute to quality deterioration of Mongolian cheese during storage. Microbiol. anal., pH, FAAs (free amino acids), volatile compounds, and sensory evaluation of the cheese during storage were also studied. A total of 278 metabolites were identified in Mongolian cheese, of which 51 metabolites were used as differential metabolites, including amino acids, peptides, organic acids, lipids, and carbohydrates. Bitter amino acids, bitter peptide (Phe-Ile), and organic acids (sinapic acid, butyric acid) increased during storage. Metabolic pathway anal. showed that differential metabolites were mainly related to amino acid metabolism, such as β-alanine metabolism and glycine, serine, and threonine metabolism Moreover, accompanied with the increased contents of short-chain fatty acids, 2-undecanone and Et esters, strength of odor and unpleasant smell increased but overall acceptability decreased during Mongolian cheese storage. This research provides suitable strategies for quality control of Mongolian cheese during shelf life. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Recommanded Product: Octyl acetate).

Octyl acetate (cas: 112-14-1) 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. 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: Octyl acetate

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

Design, Synthesis, and Biological Evaluation of New Peripheral 5HT_2A Antagonists for Nonalcoholic Fatty Liver Disease was written by Kim, Minhee;Hwang, Inseon;Pagire, Haushabhau S.;Pagire, Suvarna H.;Choi, Wonsuk;Choi, Won Gun;Yoon, Jihyeon;Lee, Won Mi;Song, Jin Sook;Yoo, Eun Kyung;Lee, Seung Mi;Kim, Mi-jin;Bae, Myung Ae;Kim, Dooseop;Lee, Heejong;Lee, Eun-Young;Jeon, Jae-Han;Lee, In-Kyu;Kim, Hail;Ahn, Jin Hee. And the article was included in Journal of Medicinal Chemistry in 2020.Formula: C4H7NS The following contents are mentioned in the article:

Nonalcoholic fatty liver disease (NAFLD) is increasingly prevalent worldwide, causing serious liver complications, including nonalcoholic steatohepatitis. Recent findings suggest that peripheral serotonin (5-hydroxytryptamine, 5HT) regulates energy homeostasis, including hepatic lipid metabolism More specifically, liver-specific 5HT_2A knockout mice exhibit alleviated hepatic lipid accumulation and hepatic steatosis. Here, structural modifications of pimavanserin (CNS drug), a 5HT_2A antagonist approved for Parkinson’s disease, led us to synthesize new peripherally acting 5HT_2A antagonists. Among the synthesized compounds, compound 14a showed good in vitro activity, good liver microsomal stability, 5HT subtype selectivity, and no significant inhibition of CYP and hERG. The in vitro and in vivo blood-brain barrier permeability study proved that 14a acts peripherally. Compound 14a decreased the liver weight and hepatic lipid accumulation in high-fat-diet-induced obesity mice. Our study suggests new therapeutic possibilities for peripheral 5HT_2A antagonists in NAFLD. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Formula: C4H7NS).

Isopropylisothiocyanate (cas: 2253-73-8) 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. 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.Formula: C4H7NS

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

Design, Synthesis, and Biological Evaluation of New Peripheral 5HT_2A Antagonists for Nonalcoholic Fatty Liver Disease was written by Kim, Minhee;Hwang, Inseon;Pagire, Haushabhau S.;Pagire, Suvarna H.;Choi, Wonsuk;Choi, Won Gun;Yoon, Jihyeon;Lee, Won Mi;Song, Jin Sook;Yoo, Eun Kyung;Lee, Seung Mi;Kim, Mi-jin;Bae, Myung Ae;Kim, Dooseop;Lee, Heejong;Lee, Eun-Young;Jeon, Jae-Han;Lee, In-Kyu;Kim, Hail;Ahn, Jin Hee. And the article was included in Journal of Medicinal Chemistry in 2020.HPLC of Formula: 2253-73-8 The following contents are mentioned in the article:

Nonalcoholic fatty liver disease (NAFLD) is increasingly prevalent worldwide, causing serious liver complications, including nonalcoholic steatohepatitis. Recent findings suggest that peripheral serotonin (5-hydroxytryptamine, 5HT) regulates energy homeostasis, including hepatic lipid metabolism More specifically, liver-specific 5HT_2A knockout mice exhibit alleviated hepatic lipid accumulation and hepatic steatosis. Here, structural modifications of pimavanserin (CNS drug), a 5HT_2A antagonist approved for Parkinson’s disease, led us to synthesize new peripherally acting 5HT_2A antagonists. Among the synthesized compounds, compound 14a showed good in vitro activity, good liver microsomal stability, 5HT subtype selectivity, and no significant inhibition of CYP and hERG. The in vitro and in vivo blood-brain barrier permeability study proved that 14a acts peripherally. Compound 14a decreased the liver weight and hepatic lipid accumulation in high-fat-diet-induced obesity mice. Our study suggests new therapeutic possibilities for peripheral 5HT_2A antagonists in NAFLD. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8HPLC of Formula: 2253-73-8).

Isopropylisothiocyanate (cas: 2253-73-8) 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. 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.HPLC of Formula: 2253-73-8

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

Analysis of microbiomes in three traditional starters and volatile components of the Chinese rice wines was written by Chen, Lihua;Ren, Lixia;Li, Dongna;Ma, Xia. And the article was included in Food Science and Biotechnology in 2021.Computed Properties of C11H22O2 The following contents are mentioned in the article:

Abstract: To understand the effect of microbial community on the flavor of fermented rice wine, microbiomes in three traditional starters (CMQ, NBQ, and YCQ) from different origins for making Chinese rice wines were evaluated and the volatile components of their rice wines were compared. The results showed that the dominant genera in CMQ were Pantoea, Bacillus, Rhizopus, and Candida, the dominant microorganisms in NBQ were Pediococcus, Lactobacillus, Acetobacter, Weissella, Bacillus, Rhizopus, Candida, and Aspergillus, the dominant microorganisms in YCQ were Pediococcus, Lactobacillus, Leuconostoc, Weissella, Lactococcus, Ochrobactrum, Rhizopus, and Mucor. There were significant differences in sensory properties of the wines brewed by three starters. Although the major aroma components were benzyl alc., 2-octanone, benzoic acid, and phenethyl acetate, each rice wine had its own main aroma components include 1-octanol, 1-pentanol, Et acetate, etc. The results showed that the different microbial communities in starter results in the significant difference of the aroma components in its fermented rice wine. This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Computed Properties of C11H22O2).

Isopentyl hexanoate (cas: 2198-61-0) 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. 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. Computed Properties of C11H22O2

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

A chiral metal-organic cage used as the stationary phase for gas chromatography separations was written by Tang, Bo;Zhang, Xin;Geng, Lina;Sun, Liquan;Luo, Aiqin. And the article was included in Journal of Chromatography A in 2021.COA of Formula: C8H16O2 The following contents are mentioned in the article:

Chiral metal-organic cages (MOCs) are a new type of porous materials with unique mol. recognition ability, which have received research attention as a chiral stationary phase (CSP) for gas chromatog. (GC). Herein, we report the detailed investigation of a chiral MOC ([Cu₁₂(L_PA)₁₂(H₂O)₁₂], PA = L-phenylalanine, MOC-PA) as a novel stationary phase for GC separations The MOC-PA capillary column exhibited a high-resolution performance for a wide range of analytes, including n-alkanes, n-alcs., esters, aromatic compounds and the Grob mixture, positional isomers and racemates. In particular, MOC-PA coated column displayed good resolution and performance for amino acid derivatives Moreover, the MOC-PA column showed excellent separation repeatability and reproducibility. The relative standard deviation (RSD) values for the retention times were in the range of 0.16-0.30% for run to run (n = 3), 0.31-0.77% for day-to-day (n = 3), and 3.6-4.7% for column-to-column (n = 3), resp. The exptl. results showed that MOC-PA had great potential as a GC stationary phase. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0COA of Formula: C8H16O2).

Methyl heptanoate (cas: 106-73-0) 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. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.COA of Formula: C8H16O2

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

Design, Synthesis, Biological Evaluation and SARs of Novel Anthranilic Diamide Derivatives Containing Amide, Carbamate, Urea, and Thiourea Moieties was written by Liu, Jingbo;Li, Yuxin;Zhang, Xiulan;Cheng, Dandan;Wei, Wei;Wu, Changchun;Xie, Yongtao;Xiong, Lixia;Li, Zhengming. And the article was included in Chinese Journal of Chemistry in 2017.Quality Control of Isopropylisothiocyanate The following contents are mentioned in the article:

In order to discover potential ryanodine receptor insecticides, 21 novel anthranilic diamide analogs containing amide, carbamate, urea, and thiourea moieties were designed and synthesized based on bioisosteric approach. The biol. assays against oriental armyworm (Mythimna separata) and diamondback moth (Plutella xylostella) indicated that these compounds displayed moderate to excellent activities. Especially, compound I showed 100% larvicidal activities against oriental armyworm at 1.0 mg·L^-1, equivalent to the standard chlorantraniliprole (100%, 1.0 mg·L^-1). Moreover, the larvicidal activity of I against diamondback moth was 100% at 0.1 mg·L^-1, more effective than that of chlorantraniliprole (90%, 0.1 mg·L^-1). Therefore, I can be used as a new lead structure for the development of insecticidal agents. The preliminary structure-activity relationship showed that the introduction of carbamate groups into 4-position on the benzene ring of the N-phenylpyrazole moiety has a pos. effect on the larvicidal activities. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Quality Control of Isopropylisothiocyanate).

Isopropylisothiocyanate (cas: 2253-73-8) 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. 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.Quality Control of Isopropylisothiocyanate

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