Tag: 300-400

Portable functional hydrogels based on silver metallization for visual monitoring of fish freshness was written by Luo, Qian;Zhang, Yaqin;Zhou, Yan;Liu, Shi Gang;Gao, Wenli;Shi, Xingbo. And the article was included in Food Control in 2021.Quality Control of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate The following contents are mentioned in the article:

A simple, cost-effective and non-destructive sensing strategy is developed to real-time monitor the biogenic amines (BAs) for evaluating the food spoilage. This sensing strategy is performed on a functional hydrogel, which is fabricated by β-D-glucose pentaacetate (β-D-GP), silver ions and agarose hydrogel. The β-D-GP serves as a reducing agent precursor because it can be hydrolyzed into β-D-glucose under alk. environment of BAs exposure. The as-prepared β-D-glucose further reduces silver ions (Ag+) to silver nanoparticles (Ag0) along with the color changes. The color changes can be distinguished by naked eyes, and digitized by a smartphone combined with RGB (red/green/blue) anal. The (R + G + B)/B gray value of hydrogel is used to not only quantify the BAs vapor, but also successfully assess the freshness of actual sample. Compared to other previously reported BAs sensors, this strategy circumvents the pre-synthesis of fluorescence/colorimetric probe in advance, making its more economical and practical for monitoring the freshness of fish. 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: 604-69-3Quality Control of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) 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 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.Quality Control of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate

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

Reduced-fat chocolate spreads developed by water-in-oleogel emulsions was written by Tirgarian, Behraad;Yadegari, Hoda;Bagheri, Ali;Neshagaran, Elnaz;Mardani, Mohsen;Farmani, Jamshid. And the article was included in Journal of Food Engineering in 2023.Related Products of 31566-31-1 The following contents are mentioned in the article:

This paper reports the successful development of low-fat chocolate spreads using water-in-oleogel emulsions. Glycerol monostearate (20% wt) was incorporated into corn oil to fabricate the oleogel phase and then water was mixed with oleogel at weight ratios of 0:100, 45:55, 50:50, and 55:45 (water: oleogel) to produce water-in-oleogel emulsions. The chocolate spreads prepared with water-in-oleogel emulsions were analyzed and compared in terms of phys., rheol., and sensory characteristics. It was found that the emulsion made at 45:55 water: oleogel ratio (45% replacement of oleogel with water), resulted in chocolate with quite similar microstructural integrity, water activity, Casson viscosity, yield stress, linear viscoelastic region, firmness, and spreadability to the reference sample (100% of oleogel). Moreover, the reduced-fat chocolate spread displayed comparable (if not superior) sensory scores and acceptability to the full-fat sample. In conclusion, water-in-oleogel emulsion displayed the potential for use in the formulation of reduced-fat chocolate spread. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Related Products of 31566-31-1).

Glyceryl monostearate (cas: 31566-31-1) 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.Related Products of 31566-31-1

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

A New Class of Bi- and Trifunctional Sugar Oximes as Antidotes against Organophosphorus Poisoning was written by Da Silva, Ophelie;Probst, Nicolas;Landry, Christophe;Hanak, Anne-Sophie;Warnault, Pierre;Coisne, Caroline;Calas, Andre-Guilhem;Gosselet, Fabien;Courageux, Charlotte;Gastellier, Anne-Julie;Trancart, Marilene;Baati, Rachid;Dehouck, Marie-Pierre;Jean, Ludovic;Nachon, Florian;Renard, Pierre-Yves;Dias, Jose. And the article was included in Journal of Medicinal Chemistry in 2022.COA of Formula: C16H22O11 The following contents are mentioned in the article:

Recent events demonstrated that organophosphorus nerve agents are a serious threat for civilian and military populations. The current therapy includes a pyridinium aldoxime reactivator to restore the enzymic activity of acetylcholinesterase located in the central nervous system and neuro-muscular junctions. One major drawback of these charged acetylcholinesterase reactivators is their poor ability to cross the blood-brain barrier. In this study, we propose to evaluate glucoconjugated oximes devoid of permanent charge as potential central nervous system reactivators. We determined their in vitro reactivation efficacy on inhibited human acetylcholinesterase, the crystal structure of two compounds in complex with the enzyme, their protective index on intoxicated mice, and their pharmacokinetics. We then evaluated their endothelial permeability coefficients with a human in vitro model. This study shed light on the structural restrains of new sugar oximes designed to reach the central nervous system through the glucose transporter located at the blood-brain barrier. 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: 604-69-3COA of Formula: C16H22O11).

(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. 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: C16H22O11

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

Property of alkyltri(oxyethyl) β-D-glucopyranosides was written by Fan, Yulin;Fu, Fang;Chen, Langqiu;Li, Jiping;Zhang, Jing;Zhang, Guochao;Liao, Jingyi. And the article was included in Journal of Molecular Liquids in 2021.Electric Literature of C16H22O11 The following contents are mentioned in the article:

Based on reconstructing conventional alkyl β-D-glucopyranosides, alkyltri(oxyethyl) β-D-glucopyranosides (4a-4h, n = 6-16) were prepared by introducing a tri(oxyethyl) group ((-OCH₂CH₂-)₃) as a hydrophilic spacer to improve effectively the related water solubility Their foaming performance, emulsifying property, hygroscopicity, solubility, and thermotropic phase transitions were further investigated. The exptl. results showed that the phase transition temperature (T_iso) increased with increasing their alkyl chain length. Such β-D-glucopyranosides (4b-4h, n = 7-16) showed a smectic focal conic-shaped texture. Their water solubility, surface tension, CMC value, and hygroscopicity decreased with increasing their alkyl chain length. Meanwhile, 4e (n = 10) had the best foamability. In the rapeseed oil/water system, 4f (n = 12) had excellent emulsifying property. Furthermore, 4 (n = 8, 10, 12) and SDS or CTAC had the synergistic effect because their exptl. CMC value was smaller than their ideal CMC value (CMC^id). 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: 604-69-3Electric Literature of C16H22O11).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. 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.Electric Literature of C16H22O11

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

A Comprehensive Evaluation of the Density of Neat Fatty Acids and Esters was written by Knothe, Gerhard;Steidley, Kevin R.. And the article was included in Journal of the American Oil Chemists’ Society in 2014.Quality Control of Methyl nonadecanoate The following contents are mentioned in the article:

D. is one of the most important phys. properties of a chem. compound, affecting numerous applications. An application in the case of fatty acid esters (biodiesel) is that d. is specified in some biodiesel standards In the present work, the d. of fatty acid Me, Et, Pr, and Bu esters as well as triacylglycerols in the C₈-C₂₄ range was determined in the range of 15-40 °C with a densitometer utilizing the oscillating U-tube technique. Literature data on d. are compiled and compared, showing that data for these compounds are incomplete with discrepancies existing in some cases. Besides known effects such as d. decreasing with increasing chain length and increasing saturation, it is shown that trans fatty compounds exhibit lower d. than cis fatty compounds D. data for several saturated odd-numbered, C₁₈, as well as C₂₀ and C₂₂ polyunsaturated fatty esters are reported for the first time. The d. contribution of compounds with high m.ps. is predicted. An equation is given for the calculation of the d. of mixtures This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Quality Control of Methyl nonadecanoate).

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

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

Glycosides and Glycoconjugates of the Diterpenoid Isosteviol with a 1,2,3-Triazolyl Moiety: Synthesis and Cytotoxicity Evaluation was written by Andreeva, Olga V.;Garifullin, Bulat F.;Sharipova, Radmila R.;Strobykina, Irina Yu.;Sapunova, Anastasiya S.;Voloshina, Alexandra D.;Belenok, Mayya G.;Dobrynin, Alexey B.;Khabibulina, Leysan R.;Kataev, Vladimir E.. And the article was included in Journal of Natural Products in 2020.COA of Formula: C16H22O11 The following contents are mentioned in the article:

Several glycoconjugates of the diterpenoid isosteviol (16-oxo-ent-beyeran-19-oic acid) with a 1,2,3-triazolyl moiety were synthesized, and their cytotoxicity was evaluated against some human cancer and normal cell lines. Most of the synthesized compounds demonstrated weak inhibitory activities against the M-HeLa and MCF-7 human cancer cell lines. Three lead compounds exhibited high selective cytotoxic activity against M-HeLa cells (IC₅₀ = 1.7-1.9μM) that corresponded to the activity of the anticancer drug doxorubicin (IC₅₀ = 3.0μM). Moreover, the lead compounds were not cytotoxic with respect to a Chang liver human normal cell line (IC₅₀ > 100μM), whereas doxorubicin was cytotoxic to this cell line (IC₅₀ = 3.0μM). It was found that cytotoxic activity of the lead compounds is due to induction of apoptosis proceeding along the mitochondrial pathway. The present findings suggest that 1,2,3-triazolyl-ring-containing glycoconjugates of isosteviol are a promising scaffold for the design of novel anticancer agents. 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: 604-69-3COA of Formula: C16H22O11).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. 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.COA of Formula: C16H22O11

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

Hypromellose – Collagen hydrogels/sesame oil organogel based bigels as controlled drug delivery systems was written by Corredor-Chaparro, Maira Yohana;Vargas-Riveros, Daniela;Mora-Huertas, Claudia Elizabeth. And the article was included in Journal of Drug Delivery Science and Technology in 2022.Safety of Glyceryl monostearate The following contents are mentioned in the article:

The search for novel strategies to formulate bioactive mols. for topical administration is a matter of permanent interest in the pharmaceutical field. As a contribution, the present work deepens the bigels, i.e., matrix-in-matrix systems resulting from mixing a hydrogel and an organogel. Hypromellose, collagen, gelatin, alginate, sesame oil, medium-chain triglycerides, and iso-Pr myristate were included among the starting materials investigated. Nonetheless, the bigels’ homogeneity and stability are determined by the nature and proportion of the starting materials and operating conditions used during their preparation On the other hand, bigels exhibit a different structure than the starting gels and other related systems such as emulgels, which govern their rheol. and texture behaviors, and modulate the drug delivery, as evidenced through the tests using diclofenac in its dissociated and non-dissociated forms. On this basis, this semisolid system attracts attention to developing versatile pharmaceutical products wherein controlled release of active mols. is intended. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Safety of Glyceryl monostearate).

Glyceryl monostearate (cas: 31566-31-1) 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. 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 Glyceryl monostearate

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

Structure-Based Classification of Antibacterial Activity was written by Cronin, Mark T. D.;Aptula, Aynur O.;Dearden, John C.;Duffy, Judith C.;Netzeva, Tatiana I.;Patel, Hiren;Rowe, Philip H.;Schultz, T. Wayne;Worth, Andrew P.;Voutzoulidis, Konstantinos;Schueuermann, Gerrit. And the article was included in Journal of Chemical Information and Computer Sciences in 2002.Safety of 4-Acetamidophenyl 2-acetoxybenzoate The following contents are mentioned in the article:

The aim of this study was to develop a simple quant. structure-activity relation (QSAR) for the classification and prediction of antibacterial activity, to enable in silico screening. To this end a database of 661 compounds, classified according to whether they had antibacterial activity, and for which a total of 167 physicochem. and structural descriptors were calculated, was analyzed. To identify descriptors that allowed separation of the two classes (i.e. those compounds with and without antibacterial activity), anal. of variance was utilized and models were developed using linear discriminant and binary logistic regression analyses. Model predictivity was assessed and validated by the random removal of 30% of the compounds to form a test set, for which predictions were made from the model. The results of the analyses indicated that six descriptors, accounting for hydrophobicity and inter- and intramol. hydrogen bonding, provided excellent separation of the data. Logistic regression anal. was shown to model the data slightly more accurately than discriminant anal. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Safety of 4-Acetamidophenyl 2-acetoxybenzoate).

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. 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 4-Acetamidophenyl 2-acetoxybenzoate

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

Analysis of volatile organic compounds in the ambient air of a paper mill- a case study was written by Tong, Xin;Zhang, Zhenbin;Chen, Xiaoquan;Shen, Wenhao. And the article was included in BioResources in 2015.Electric Literature of C20H40O2 The following contents are mentioned in the article:

In this work, volatile organic compounds (VOCs) in the ambient air of a secondary fiber paper mill were analyzed. For the sake of studying pollution comprehensively, four sites in the paper mill were analyzed and active sampling methods were used. Desorption was carried out with two solvents, carbon disulfide and dichloromethane. The compositions of VOCs were determined by gas chromatog.-mass spectrometry (GC-MS) method. The main identified substances in the four sites were as follows: (1) waste paper sorting room: alkanes, phenols, and esters; (2) papermaking workshop: benzene series, alkanes, ethers, and phenols; (3) vacuum pump outlet: benzene series and phenols; and (4) office area: benzene series and phenols. Two main toxic substances in VOCs, the benzene series and phenols, were detected in the ambient air of the paper mill. The benzene series existed in three places along the main process of the paper mill and even existed in the office area, which was far away from the production line. Addnl., phenols were detected in all sampling locations in the paper mill. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Electric Literature of C20H40O2).

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. 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 C20H40O2

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

Discovery of Salidroside Glycoside Analogs as Novel Angiogenesis Agents to Treat Diabetic Hind Limb Ischemia was written by Liu, Caiping;Han, Jingxuan;Marcelina, Olivia;Nugrahaningrum, Dyah Ari;Huang, Song;Zou, Meijuan;Wang, Guixue;Miyagishi, Makoto;He, Yun;Wu, Shourong;Kasim, Vivi. And the article was included in Journal of Medicinal Chemistry in 2022.Related Products of 604-69-3 The following contents are mentioned in the article:

Therapeutic angiogenesis is a potential therapeutic strategy for hind limb ischemia (HLI); however, currently, there are no small-mol. drugs capable of inducing it at the clin. level. Activating the hypoxia-inducible factor-1 (HIF-1) pathway in skeletal muscle induces the secretion of angiogenic factors and thus is an attractive therapeutic angiogenesis strategy. Using salidroside, a natural glycosidic compound as a lead, we performed a structure-activity relationship (SAR) study for developing a more effective and drug angiogenesis agent. We found a novel glycoside scaffold compound (C-30) with better efficacy than salidroside in enhancing the accumulation of the HIF-1α protein and stimulating the paracrine functions of skeletal muscle cells. This in turn significantly increased the angiogenic potential of vascular endothelial and smooth muscle cells and, subsequently, induced the formation of mature, functional blood vessels in diabetic and non-diabetic HLI mice. Together, this study offers a novel, promising small-mol.-based therapeutic strategy for treating HLI. 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: 604-69-3Related Products of 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. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. 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.Related Products of 604-69-3

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