Month: November 2022

Investigation of a new horizon antifungal activity with enhancing the antimicrobial efficacy of ciprofloxacin and its binary mixture via their encapsulation in nanoassemblies: in vitro and in vivo evaluation was written by Abou Taleb, Sally;Darwish, Asmaa Badawy;Abood, Amira;Mohamed, Amany M.. And the article was included in Drug Development Research in 2020.Name: Diphenyl carbonate The following contents are mentioned in the article:

The main goal of this study was to prepare and evaluate nanosponges containing ciprofloxacin (CIP) or its binary mixture with N-acetyl carnosine (NAC). Nanosponges were prepared by ultrasound-assisted synthesis technique using hydroxypropyl βeta-cyclodextrin (HPβ-CD), as the polymer and di-Ph carbonate (DPC) as the crosslinker. Entrapment efficiency (EE%) of CIP or its binary mixture with NAC in nanosponges was deduced spectrophotometrically. Nanosponges were characterized using several methods. EE% of CIP or its binary mixture with NAC inside nanosponges ranged from 98.63 ± 3.1 to 100 ± 0.07%. Particle size of nanosponges ranged from 66.7 to 90.1 nm. Release of drugs from nanosponges was biphasic and the release pattern followed Korsmeyer-Peppas model. Ex vivo and in vivo studies results showed that the antibacterial effect was enhanced with encapsulation of drugs in the nanosponge system. Furthermore, a potent antifungal activity was obtained from all examined formulas against Candida albicans (10231). The study revealed that successful encapsulation of CIP or its binary mixture with NAC in nanosponge formulations has innovated a new promising therapeutic activity for both drugs. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Name: Diphenyl carbonate).

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. 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.Name: Diphenyl carbonate

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

A superchilling storage-ice glazing (SS-IG) of Atlantic salmon (Salmo salar) sashimi fillets using coating protective layers of Zanthoxylum essential oils (EOs) was written by He, Qi;Li, Ziyin;Yang, Zhao;Zhang, Yangcong;Liu, Jun. And the article was included in Aquaculture in 2020.COA of Formula: C10H20O2 The following contents are mentioned in the article:

Sashimi is a perishable aquatic product. Low temperature offers a promising avenue to preserve sashimi, but traditional frozen methods can hardly avoid the undesirable effects caused by fluids’ freezing. The aim of this work is to establish a superchilling storage-ice glazing (SS-IG) approach using essential oils (EOs) from Zanthoxylum acanthopodium (ZA) and Zanthoxylum simulans (ZS) to preserve sashimi. Different compound of EOs were identified using GC-MS. Twelve main active compositions accounted for 52.85% and 63.19% of the total oils. Fresh salmon sashimi fillets were coated by 0.3% of EOs and stored at (-1 ± 0.2) °C for 25 days. EOs-based ice-glazing layers were formed on the surface of sashimi, while the fluids in sashimi samples still kept at liquid state. As the results, the microstructure and sensory quality of sashimi were maximally maintained. The growth of microbial populations and production of total volatile basic nitrogen (TVB-N) in sashimi were inhibited. The degree of lipid oxidation in sashimi was limited at a low range. The results revealed this SS-IG approach can effectively retain the overall quality of sashimi during storage and will be a promising means for the development of sushi industry. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1COA of Formula: 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. Polyesters are important plastics, with monomers linked by ester moieties. 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. COA of Formula: C10H20O2

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

Molecular modeling of the standard state heat of formation was written by Bagheri, Mehdi;Yerramsetty, Krishna;Gasem, Khaled A. M.;Neely, Brian J.. And the article was included in Energy Conversion and Management in 2013.Formula: C7H14O3 The following contents are mentioned in the article:

The standard heat of formation is a basic thermophys. property required in determining enthalpies of reaction and in thermodn. stability analyses. Further, the enthalpies of formation are important in investigating bond energies, resonance energies and the nature of chem. bonds. Therefore, the development of accurate structure-based estimation methods for large varieties of chem. species is greatly beneficial in enhancing capability in process and product development. In this work, quant. structure-property relationship (QSPR) models were developed for a structurally diverse DIPPR dataset of standard heats of formation comprising 1765 pure compounds involving 82 chem. classes. We have employed both linear and nonlinear QSPR modeling techniques. The linear approach involves the use of constricted binary particle swarm optimization (BPSO) for feature selection and multiple-linear regression. In the nonlinear approach, the optimum network architecture and its associated inputs are identified using a wrapper-based feature selection algorithm combining differential evolution and artificial neural networks. Model predictions for the root-mean-square error of the BPSO and nonlinear approaches were 138 and 97 kJ/mol, resp. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Formula: C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Formula: C7H14O3

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

Tyrosine-Reactive Cross-Linker for Probing Protein Three-Dimensional Structures was written by Cui, Lili;Ma, Yongge;Li, Ming;Wei, Zhonglin;Huan, Yanfu;Li, Hongmei;Fei, Qiang;Zheng, Lianyou. And the article was included in Analytical Chemistry (Washington, DC, United States) in 2021.SDS of cas: 102-09-0 The following contents are mentioned in the article:

Crosslinking mass spectrometry (XL-MS) has made significant progress in understanding the structure of protein and elucidating architectures of larger protein complexes. Current XL-MS applications are limited to targeting lysine, glutamic acid, aspartic acid, and cysteine residues. There remains a need for the development of novel cross-linkers enabling selective targeting of other amino acid residues in proteins. Here, a novel simple cross-linker, namely, [4,4′-(disulfanediylbis(ethane-2,1-diyl)) bis(1,2,4-triazolidine-3,5-dione)] (DBB) (I), has been designed, synthesized, and characterized. This cross-linker can react selectively with tyrosine residues in protein through the electrochem. click reaction. The DBB cross-links produced the characteristic peptides before and after electrochem. reduction, thus permitting the simplified data anal. and accurate identification for the cross-linked products. This is the first time a cross-linker is developed for targeting tyrosine residues on protein without using photoirradiation or a metal catalyst. This strategy might potentially be used as a complementary tool for XL-MS to probe protein 3D structures, protein complexes, and protein-protein interaction. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0SDS of cas: 102-09-0).

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. 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. SDS of cas: 102-09-0

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

Synthesis, Herbicidal Activity, Crop Safety and Soil Degradation of Pyrimidine- and Triazine-Substituted Chlorsulfuron Derivatives was written by Wu, Lei;Gu, Yu-Cheng;Li, Yong-Hong;Zhou, Sha;Wang, Zhong-Wen;Li, Zheng-Ming. And the article was included in Molecules in 2022.HPLC of Formula: 102-09-0 The following contents are mentioned in the article:

In order to obtain sulfonylurea herbicides with good crop safety for both wheat and corn, while maintaining high herbicidal activities, a series of pyrimidine- and triazine-based diethylamino-substituted chlorsulfuron derivatives I [R¹ = Me, MeO, p-tolyl, etc.; R² = CH,N; R³ = H, Me, MeO, Cl] were systematically evaluated. The structures of the synthesized compounds I were confirmed with ¹H NMR, ¹³C NMR and HRMS. The preliminary biol. assay results indicate that the 4,6-disubstituted pyrimidine and triazine derivatives could maintain high herbicidal activity. It was found that the synthesized compounds I could accelerate degradation rates, both in acidic and alk. soil. Especially, in alk. soil, the degradation rate of the target compounds I accelerated more than 22-fold compared to chlorsulfuron. Moreover, most chlorsulfuron analogs I exhibited good crop safety for both wheat and corn at high dosages. This study provided a reference for the further design of new sulfonylurea herbicides I with high herbicidal activity, fast degradation rates and high crop safety. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0HPLC of Formula: 102-09-0).

Diphenyl carbonate (cas: 102-09-0) 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. 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: 102-09-0

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

Chemical transformation of terpenoids. X. Ionophoretic activities of macrocyclic lactone epoxides synthesized from geraniol was written by Shibuya, Hirotaka;Ohashi, Kazuyoshi;Narita, Norihiko;Ishida, Toshimasa;Kitagawa, Isao. And the article was included in Chemical & Pharmaceutical Bulletin in 1994.Quality Control of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate The following contents are mentioned in the article:

Two coronand-type 18-membered lactone epoxides, i.e., geranyl dimeric lactone diepoxide (GL₂E₂, I) and tetraepoxide (GL₂E₄, II), were synthesized from geraniol as diastereomeric mixtures Among them, II was shown to exhibit ion-transport activity for Ca²⁺ ion in the test using a W-07 (liquid-membrane type) apparatus and ion-permeation activities for Ca²⁺ and K⁺ ions across the human erythrocyte membrane. Isolation of six component diastereomers of II was effected by HPLC separation of two diastereomeric tetraepoxides, III and IV which were prepared from two diepoxides I. The relative stereostructures of these diastereomers were determined by a combination of X-ray diffraction and ¹H-NMR analyses. Among the six diastereomers, S₂-sym. V exhibited the strongest ion-transport activity for Ca²⁺ ion while C₂-sym. GL₂E₄-6 VI exhibited the strongest ion-permeation activity for Ca²⁺ ion across the human erythrocyte membrane. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Quality Control of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) 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. 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.Quality Control of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate

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

Rhabdaerophilum calidifontis gen. nov., sp. nov., a novel bacterium isolated from a hot spring, and proposal of Rhabdaerophilaceae fam. nov. was written by Ming, Yu-Zhen;Liu, Lan;Xian, Wen-Dong;Jiao, Jian-Yu.;Liu, Ze-Tao;Li, Meng-Meng;Xiao, Min;Li, Wen-Jun. And the article was included in International Journal of Systematic and Evolutionary Microbiology in 2020.Reference of 1731-94-8 The following contents are mentioned in the article:

A novel thermotolerant bacterial strain was isolated from a hot spring in a Tibetan geothermal field. Phylogenetic anal. of the 16S rRNA gene sequence of the novel strain showed that it belongs to a distinct lineage far from any known taxa. The new isolate shared the highest pairwise sequence identity with Phreatobacter cathodiphilus S-12T (92.8% similarity) according to the 16S rRNA gene sequences. Cells were Gram-stain-neg., aerobic, rod-shaped and formed white round colonies. The strain grew at the ranges of 28-45°C (optimum, 37°C), pH 5.0-7.0 (optimum, pH 6.0) and 0-2% NaCl. The strain was pos. for catalase and oxidase. The major respiratory quinone was ubiquinone Q-10. Polar lipids consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol and phosphatidylcholine. The major fatty acids were summed feature 8 (C18:1 ω7c and/or C18:1 ω6c). The DNA G+C content was 68.3 mol%. Based on these distinguishing properties, this strain is proposed to represent a new species of a new genus Rhabdaerophilum calidifontis gen. nov., sp. nov., within a new family Rhabdaerophilaceae fam. nov. The type strain of the type species of Rhabdaerophilum calidifontis is SYSU G02060T (=KCTC 72351T=CGMCC 1.17070T). This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Reference of 1731-94-8).

Methyl nonadecanoate (cas: 1731-94-8) 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. 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.Reference of 1731-94-8

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

Biosynthesis of Cu/KF/Clinoptilolite@MWCNTs nanocomposite and its application as a recyclable nanocatalyst for the synthesis of new Schiff base of benzoxazine derivatives and reduction of organic pollutants was written by Hamedani, Naghmeh Faal;Hargalani, Fariba Zamani;Rostami-Charati, Faramarz. And the article was included in Molecular Diversity in 2022.SDS of cas: 2253-73-8 The following contents are mentioned in the article:

A new Schiff base of benzoxazine derivativesI (R = ethoxycarbonyl, CN; R¹ = i-Pr, Ph, Bn, etc.; R² = Me, Et; R³ = H, OMe, Me, OH; R⁴ = H, Me) in excellent yields using multicomponent reactions of phthalaldehyde or its derivatives2-CHO3-R³-5-R⁴-C₆H₂CHO primary amines RCH₂NH₂, isothiocyanates R¹N=C=S, 2,4-dihydroxyacetophenone, isopropenylacetylene and Me or Et amine in the presence of catalytic amount of Cu/KF/CP@MWCNTs NCs in water at room temperature were synthesized. Also, the catalytic activity of the green synthesized Cu/KF/CP@MWCNTs NCs was evaluated in the reduction in organic pollutants such as 4-nitrophenol (4-NP) in water at mild conditions. The results indicated that the biosynthesized NCs have very high and effective catalytic activity for organic pollutants within few seconds. As well the antioxidant activity of some synthesized benzoxazine was studied using trapping of radical by DPPH and ferric reduction activity potential (FRAP) experiment The short time of reaction, high yields of product, easy separation of catalyst and products are some benefits of this procedure. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8SDS of cas: 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. 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. SDS of cas: 2253-73-8

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

Biosynthesis of Cu/KF/Clinoptilolite@MWCNTs nanocomposite and its application as a recyclable nanocatalyst for the synthesis of new Schiff base of benzoxazine derivatives and reduction of organic pollutants was written by Hamedani, Naghmeh Faal;Hargalani, Fariba Zamani;Rostami-Charati, Faramarz. And the article was included in Molecular Diversity in 2022.Electric Literature of C4H7NS The following contents are mentioned in the article:

A new Schiff base of benzoxazine derivativesI (R = ethoxycarbonyl, CN; R¹ = i-Pr, Ph, Bn, etc.; R² = Me, Et; R³ = H, OMe, Me, OH; R⁴ = H, Me) in excellent yields using multicomponent reactions of phthalaldehyde or its derivatives2-CHO3-R³-5-R⁴-C₆H₂CHO primary amines RCH₂NH₂, isothiocyanates R¹N=C=S, 2,4-dihydroxyacetophenone, isopropenylacetylene and Me or Et amine in the presence of catalytic amount of Cu/KF/CP@MWCNTs NCs in water at room temperature were synthesized. Also, the catalytic activity of the green synthesized Cu/KF/CP@MWCNTs NCs was evaluated in the reduction in organic pollutants such as 4-nitrophenol (4-NP) in water at mild conditions. The results indicated that the biosynthesized NCs have very high and effective catalytic activity for organic pollutants within few seconds. As well the antioxidant activity of some synthesized benzoxazine was studied using trapping of radical by DPPH and ferric reduction activity potential (FRAP) experiment The short time of reaction, high yields of product, easy separation of catalyst and products are some benefits of this procedure. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Electric Literature of C4H7NS).

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. 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.Electric Literature of C4H7NS

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

Preparation of yogurt-flavored bases by mixed lactic acid bacteria with the addition of lipase was written by Huang, Yan-yan;Yu, Jia-jia;Zhou, Qin-yu;Sun, Li-na;Liu, Dong-mei;Liang, Ming-hua. And the article was included in LWT–Food Science and Technology in 2020.Category: esters-buliding-blocks The following contents are mentioned in the article:

Yogurt-flavored bases are widely used in food industry for enhancing flavors. In this study, yogurt-flavored bases by mixed lactic acid bacteria with or without lipase were investigated, which included Streptococcus lactis ACCC 11093 (SL) and Lactobacillus casei subsp. rhamnosus 6013 (LCR), SL and Lactobacillus acidophilus 1.1878 (LAP), and SL and Lactobacillus plantarum DMDL 9010 (LP), resp. Compared with the combination of SL and LCR and the combination of SL and LAP, the combination of SL and LP had higher production of total amino acids, volatile acids and esters, suggesting that the combination of SL and LP was more efficient to produce yogurt-flavored bases. In addition, lipase significantly increased the production of amino acids associated with sweet and bitter flavors, and resulted in rougher milk globule surface and tighter network structure compared with fermentations without the addition of lipase. Furthermore, a total of 54 volatile compounds were detected in yogurt-flavored bases. The production of volatile compounds in fermentations with and without the addition of lipase, was mainly affected by acids and esters, resp. Therefore, the lipase is a favorable supplement for producing yogurt-flavored bases. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Category: esters-buliding-blocks).

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. 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.Category: esters-buliding-blocks

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