Month: December 2022

Graft copolymer of sodium carboxymethyl cellulose and polyether polyol (CMC-g-TMN-450) improves the crosslinking degree of polyurethane for coated fertilizers with enhanced controlled release characteristics was written by Wang, Yang;Sun, Mingxue;Qiao, Dan;Li, Juan;Wang, Yajing;Liu, Weiyi;Bunt, Craig;Liu, Hongxia;Liu, Jinlong;Yang, Xiangdong. And the article was included in Carbohydrate Polymers in 2021.Quality Control of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

Novel superhydrophobic sodium CM-cellulose (CMC) modified polyurethane (MPU) was developed as the membrane material for controlled-release fertilizer (CRF) by crosslinking polymerization of 4,4′-diphenylmethane diisocyanate (MDI) and CMC-based modified polyol (CMP) which was made by grafting CMC onto polyether polyol (TMN-450). The modified polyurethane coated fertilizer (MPUCF) was prepared by using MPU as the membrane material through a fluidized bed device. Anal. results of 13C NMR showed that the coatings of PUCF and MPUCF were prepared by connecting hydroxyl to isocyanate groups to form a carbamate. MPU had lower water absorption rates than PU, and MPUCF coating showed excellent hydrophobicity. Scanning electron microscope (SEM) revealed that MPUCF coating surface was much more smooth and flat than that of PUCF. Furthermore, the nitrogen (N) release longevity of MPUCF can increased to 140 days when the coating rate was 5%. It is concluded that MPU was an excellent superhydrophobic coating material for CRF. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Quality Control of Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) 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. Quality Control of Ethyl 3-ethoxypropanoate

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

High-pressure liquid densities of fatty acid methyl esters: Measurement and prediction with PC-SAFT equation of state was written by Wang, Xiaopo;Kang, Kai;Zhu, Shanshan;Gao, Bo. And the article was included in Fluid Phase Equilibria in 2018.HPLC of Formula: 106-73-0 The following contents are mentioned in the article:

In this work, exptl. d. data were reported for six fatty acid Me esters, including Me butyrate, Me valerate, Me caproate, Me pelargonate, Me heptanoate, and Me caprylate. The densities were measured from 293.15K to 363.15K and pressures up to 60MPa by a vibrating-tube densimeter. The relative uncertainty of the measurement is estimated less than 0.001 with a confidence level of 0.95. The high pressure densities were correlated with a Tait-type equation. The overall average relative deviation between exptl. data and calculated results from Tait equation for the six fatty acid esters is 0.010%. The derived thermodn. properties, such as isobaric thermal expansivity and isothermal compressibility, were obtained from the exptl. d. results. Addnl., for the studied esters, the mol. parameters of the PC-SAFT equation of state were obtained based on the corresponding vapor pressures and liquid densities. The PC-SAFT equation was used to predict the high pressure densities of the esters, and good agreements were observed This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0HPLC of Formula: 106-73-0).

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

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

Synthesis and biological evaluation of Vinpocetine derivatives was written by Pan, Bo-Wen;Shi, Yang;Li, Wen-Chao;Wang, Qing;Pan, Meng;Wu, Qiong;Fu, Hong-Zheng. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2020.COA of Formula: C4H7NS The following contents are mentioned in the article:

A new series of Vinpocetine derivatives were synthesized and evaluated for their inhibitory activity on PDE1A in vitro. Seven compounds with higher inhibitory activity were selected for surface plasmon resonance (SPR) binding experiments Compared with Vinpocetine, these high potency compounds presented a higher binding affinity with PDE1A, which was consistent with inhibitory activity. After further screening, four compounds and Vinpocetine were selected to examine the vasorelaxant effects on endothelium-intact rat thoracic aortic rings. The study suggested that the effects of compounds I (R¹ = 4-fluorophenyl) and I (R¹ = 3-fluorophenyl) were the most significant with the maximum value of 93.46 ± 0.77% and 92.90 ± 0.78% (n = 5) at a concentration of 100μM resp. Based on these studies, compounds I (R¹ = 4-fluorophenyl) and I (R¹ = 3-fluorophenyl) were considered for further development as hit compounds This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8COA of Formula: 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, 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.COA of Formula: C4H7NS

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

Synthesis and biological evaluation of Vinpocetine derivatives was written by Pan, Bo-Wen;Shi, Yang;Li, Wen-Chao;Wang, Qing;Pan, Meng;Wu, Qiong;Fu, Hong-Zheng. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2020.Electric Literature of C4H7NS The following contents are mentioned in the article:

A new series of Vinpocetine derivatives were synthesized and evaluated for their inhibitory activity on PDE1A in vitro. Seven compounds with higher inhibitory activity were selected for surface plasmon resonance (SPR) binding experiments Compared with Vinpocetine, these high potency compounds presented a higher binding affinity with PDE1A, which was consistent with inhibitory activity. After further screening, four compounds and Vinpocetine were selected to examine the vasorelaxant effects on endothelium-intact rat thoracic aortic rings. The study suggested that the effects of compounds I (R¹ = 4-fluorophenyl) and I (R¹ = 3-fluorophenyl) were the most significant with the maximum value of 93.46 ± 0.77% and 92.90 ± 0.78% (n = 5) at a concentration of 100μM resp. Based on these studies, compounds I (R¹ = 4-fluorophenyl) and I (R¹ = 3-fluorophenyl) were considered for further development as hit compounds 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 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 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.Electric Literature of C4H7NS

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

Molecular basis of the anticancer, apoptotic and antibacterial activities of Bombyx mori Cecropin A was written by Ramos-Martin, Francisco;Herrera-Leon, Claudia;D′Amelio, Nicola. And the article was included in Archives of Biochemistry and Biophysics in 2022.Product Details of 26662-94-2 The following contents are mentioned in the article:

As Cecropin XJ, Cecropin A from Bombyx mori is one of the very few antimicrobial peptides having shown activity against esophageal cancer cells. It displays remarkable sequence-similarity to Cecropin XJ but slightly enhanced activity. In this work we show by NMR that both peptides are unstructured in solution but get structured in the presence of DPC micelles, mimicking the surface of biol. membranes. In order to get insight into the mol. basis of its anticancer, antimicrobial and antifungal activity, we have investigated by MD simulations their interaction with a large variety of lipid bilayers mimicking cancer, mitochondrial, bacterial and fungal membranes. At variance with CecXJ, organized in two main helixes, CecA tends to form a three helix bundle resulting in enhanced adaptability to its membrane targets. A specificity for the headgroup of phosphatidylserine and affinity for phosphatidylglycerol and cardiolipin may account for its selective targeting of cancer, bacterial and mitochondrial membranes, resp. This study involved multiple reactions and reactants, such as (2R,9Z)-1-(((2-Aminoethoxy)(hydroxy)phosphoryl)oxy)-3-(palmitoyloxy)propan-2-yl oleate (cas: 26662-94-2Product Details of 26662-94-2).

(2R,9Z)-1-(((2-Aminoethoxy)(hydroxy)phosphoryl)oxy)-3-(palmitoyloxy)propan-2-yl oleate (cas: 26662-94-2) 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. 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.Product Details of 26662-94-2

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

Using design of experiments to fabricate nanostructured lipid carrier of egg white hydrolysates was written by Jangpromma, Nisachon;Jearranaiprepame, Supisara;Nowichai, Boonpob;Sosiangdi, Sirinthip;Khunkitti, Watcharee. And the article was included in Songklanakarin Journal of Science and Technology in 2022.Product Details of 31566-31-1 The following contents are mentioned in the article:

The aims of this study were to develop a nanostructured lipid carrier (NLC) system and optimize an appropriate NLC formulation using design of experiments (DOE). The results showed that the formulation containing glycerol monostearate (GMS) 0.35 g, stearic acid (SA) 0.50 g and iso-Pr myristate (IPM) 0.65 g was optimal with entrapment efficiency (%EE) (59.21%), particle size (233.7nm) and zeta potential (-41.26 mV). Moreover, solid lipid (GMS, SA) and liquid lipid (IPM) had significant impact on NLC characteristics. The pos. effect on the %EE was due to the interaction between GMS and IPM, and SA and IPM. The optimal formulation EWH-NLC at concentration 125 μg/mL expressed the highest inhibitory activity against NO production in RAW 264.7 macrophages with no cytotoxicity. The release profile of EWH-NLC in the cream base exhibited sustained release behavior that best fitted with Higuchi model. These results suggest that the NLC is a suitable carrier for EWH in topical application with a sustained-release profile. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Product Details of 31566-31-1).

Glyceryl monostearate (cas: 31566-31-1) 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.Product Details of 31566-31-1

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

In-source CID mass spectral libraries for the “general unknown” screening of drugs and toxicants was written by Marquet, P.;Venisse, N.;Lacassie, E.;Lachatre, G.. And the article was included in Analusis in 2001.Related Products of 5003-48-5 The following contents are mentioned in the article:

A “general unknown” screening procedure for drugs and toxicants using LC-ES-MS was developed. It involved in-source collision induced dissociation (CID) of the mol. ions (in the neg.-ion mode) or protonated mols. (in the pos.-ion mode) generally obtained from electrospray sources. Spectra were reconstructed by adding, on one hand, a pair of pos. spectra, one without and one with fragmentation, and on the other a pair of neg. spectra acquired in similar conditions. These reconstructed spectra showed at least as many fragments as MS/MS spectra, and sometimes as many as electron-ionization spectra. They were repeatable and reproducible enough to be used for the specific identification of hundreds of mols. Libraries of about 1100 pos. spectra and 500 neg. spectra were constructed and are used routinely, together with chromatog. separation involving a Nucleosil C18, 5 μm column (150 × 1 mm i.d.) and a gradient of acetonitrile in 2 mM, pH 3 ammonium formate as a screening technique complementary to GC-MS and HPLC-DAD. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Related Products of 5003-48-5).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) 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 5003-48-5

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

Recycling and Conversion of Yeasts into Organic Nitrogen Sources for Wine Fermentation: Effects on Molecular and Sensory Attributes was written by Rojas, Paula;Lopez, Daniel;Ibanez, Francisco;Urbina, Camila;Franco, Wendy;Urtubia, Alejandra;Valencia, Pedro. And the article was included in Fermentation in 2021.Recommanded Product: 2198-61-0 The following contents are mentioned in the article:

Organic nitrogen plays a significant role in the fermentation performance and production of esters and higher alcs. This study assessed the use of yeast protein hydrolyzate (YPH) as a nitrogen source for grape must fermentation In this study, we prepared an enzymic protein hydrolyzate using yeasts recovered from a previous fermentation of wine. Three treatments were performed. DAP supplementation was used as a control, while two YPH treatments were used. Low (LDH) and high degrees of hydrolysis (HDH), 3.5% and 10%, resp., were chosen. Gas chromatog. and principal component anal. indicated a significant pos. influence of YPH-supplementations on the production of esters and higher alcs. Significantly high concentrations of 3-methyl-1-penthanol, isoamyl alc., isobutanol, and 2-phenylethanol were observed Significant odorant activity was obtained for 3-methyl-1-pentanol and ethyl-2-hexenoate. The use of YPH as nitrogen supplementation is justified as a recycling yeasts technique by the increase in volatile compounds This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Recommanded Product: 2198-61-0).

Isopentyl hexanoate (cas: 2198-61-0) 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. 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.Recommanded Product: 2198-61-0

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

Conversion of lipids from wet microalgae into biodiesel using sulfonated graphene oxide catalysts was written by Cheng, Jun;Qiu, Yi;Zhang, Jie;Huang, Rui;Yang, Weijuan;Fan, Zhentao. And the article was included in Bioresource Technology in 2017.Recommanded Product: Methyl nonadecanoate The following contents are mentioned in the article:

Four solid acid catalysts including graphene oxide (GO), sulfonated graphene oxide (SGO), sulfonated graphene (SG), and sulfonated active carbon (SAC) were used to convert lipids in wet microalgae into biodiesel. The physiochem. properties of the catalysts were characterized with scanning electron microscope, X-ray diffraction, and thermogravimetric anal. SGO provided the highest conversion efficiency (84.6% of sulfuric acid) of lipids to fatty acid Me esters (FAME). Whereas SAC converted few lipids into FAME. Fourier transform IR spectroscopy, XPS, and elemental anal. revealed that much higher hydrophilic hydroxyl content in SGO catalyst resulted in a considerable higher conversion efficiency of lipids to FAME than that (48.6%) catalyzed by SG, although SO₃H groups (0.44 mmol/g) in SGO were less than those (1.69 mmol/g) in SG. Given its higher SO₃H group content than GO (0.38 mmol/g), SGO had higher conversion efficiency than GO (73.1%), when they had similar hydrophilic hydroxyl contents. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Recommanded Product: Methyl nonadecanoate).

Methyl nonadecanoate (cas: 1731-94-8) 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. 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.Recommanded Product: Methyl nonadecanoate

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