Tag: 300-400

Molecular spectroscopic study on site-selective binding of benorilate to bovine serum albumin was written by Zhang, Yan-zheng;Chen, Fang;Wang, Ya-dan;Zhang, Yin-tang;Huang, Ju;Chen, Yan;Ye, Bao-xian;Xu, Mao-tian. And the article was included in Faguang Xuebao in 2012.Application In Synthesis of 4-Acetamidophenyl 2-acetoxybenzoate The following contents are mentioned in the article:

The interaction between benorilate (BEN) and bovine serum albumin (BSA) was investigated under physiol. condition by mol. spectroscopic techniques, including fluorescence spectroscopy, UV-visible spectroscopy, synchronous fluorescence spectroscopy and three-dimensional fluorescence spectroscopy. The intrinsic fluorescence of tryptophan in BSA was significantly quenched by BEN via dynamic quenching. The hydrophobic interaction did favor the interaction of BSA with BEN. The apparent binding constants and binding sites number at the tryptophan site were 1 050 L · mol^-1 and 0.88, resp. Thermodn. parameters such as enthalpy change (ΔH), entropy change (ΔS) and free energy change (ΔG) were also obtained. The conformation changes of BSA in the presence of BEN were proved by the evidences of synchronous fluorescence spectroscopy and three-dimensional fluorescence spectroscopy. Two site-specific fluorescence probes, dansylamide (DA) and dansyl-L-proline (DP), were employed in competitive binding experiments to monitor the BEN binding sites of BSA. The apparent binding constants at site I and II were 4 300 and 21 200 L · mol^-1, resp. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Application In Synthesis of 4-Acetamidophenyl 2-acetoxybenzoate).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) 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. 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.Application In Synthesis of 4-Acetamidophenyl 2-acetoxybenzoate

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

Analysis of analgesic formulations by high-pressure liquid chromatography was written by Doadrio Villarejo, A.;Doadrio, A.;Lastres, J. L.;Cadorniga, R.. And the article was included in Anales de la Real Academia de Farmacia in 1984.Recommanded Product: 5003-48-5 The following contents are mentioned in the article:

Acetylsalicylic acid  [50-78-2], lysine acetylsalicylic acid  [37933-78-1], and benorilate  [5003-48-5] were determined by reversed-phase ion-pair HPLC in a variety of analgesic formulations containing codeine  [76-57-3], phenacetin  [62-44-2], caffeine  [58-08-2], dextropropoxyphene  [469-62-5], ascorbic acid  [50-81-7], thiamine  [59-43-8], pyridoxol  [65-23-6], cyanocobalamine  [68-19-9], phenylephrine  [59-42-7], chlorpheniramine maleate  [113-92-8], and lidocaine  [137-58-6]. The stationary phase was LiChrosorb RP18 or RP8. In addition salicylic acid  [69-72-7] was determined in the same formulations and results were compared to USP and British Pharmacopeia methods. The lower detection limit was 1 μg/mL. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Recommanded Product: 5003-48-5).

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

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

Phytochemical screening, GC-MS analysis and antioxidant activity of Curcurbita pepo L. using its leaf sample was written by Sunday, Ezekwe Ahamefula;Nnedimma, Nwadike Constance;Peter, Wokocha Gift;Orlando, George Boma. And the article was included in Asian Journal of Biology in 2021.Product Details of 1731-94-8 The following contents are mentioned in the article:

This study evaluated the phytochem. screening, gas chromatog.-mass spectrometry (GCMS) anal. and antioxidant activity of Curcurbita pepo L. using its leaf sample with standard methods. The sample used for the study was procured from Imo State University school farm and was properly identified. Result of phytochem. screening revealed the presence of saponins, flavonoids, alkaloids, steroids, phlobactannins, proteins, and anthraquinnones, while the GC-MS anal. revealed a total of 78 compounds, out which Bis(2-ethylhexyl) phthalate (C24H38O4) had the highest mol. weight, 2,4,6-Octatriene, 2,6-dimethyl- (C10H16) had the highest peak area of 10.21% while Morphinan-6-ol, 4,5-epoxy-N-methyl-, 5α 6α- (C17H21NO2) had the highest retention time. The antioxidant activity of the studied sample was enhanced against the control. Some of the compounds as revealed by GC-MS anal. could be of healthcare or industrial importance. There is need for further studies on the leaf sample to ascertain further the observations of the present study. This study has evaluated the phytochem. screening, GC-MS anal. and antioxidant activity of C. pepo L. using its leaf sample. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Product Details of 1731-94-8).

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.Product Details of 1731-94-8

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

Taming waste: Waste Mangifera indica peel as a sustainable catalyst for biodiesel production at room temperature was written by Laskar, Ikbal Bahar;Gupta, Rajat;Chatterjee, Sushovan;Vanlalveni, Chhangte;Rokhum, Lalthazuala. And the article was included in Renewable Energy in 2020.Reference of 1731-94-8 The following contents are mentioned in the article:

In the present study, the efficacy of waste peels of mango (Mangifera indica) as a basic catalyst in room temperature transesterification reaction is investigated for biodiesel production from soybean oil. Biowaste based catalyst, Mangifera indica peel ash, was prepared by conventional open air burning of the mango peel. The morphol. and chem. components of the catalyst are investigated using several techniques such as X-ray diffraction (XRD), Fourier Transform IR Spectroscopy (FT-IR), SEM (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric anal. (TGA), X-ray fluorescence (XRF), XPS, Energy-dispersive X-ray spectroscopy (EDS), Brunauer-Emmett-Teller (BET) and Hammett indicator method. The highest biodiesel yield of 98% was attained under the optimized reaction conditions; methanol to oil ration of 6:1, catalyst loading of 6 wt%, and time of 4 h under room temperature Crucially, the catalyst retained its activity up to 4th cycle of reused. The excellent catalytic activity of the ash catalyst could be attributed to the presence of highly basic metal oxides such as K₂O, MgO and CaO, its high surface area and porous nature. 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 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.Reference of 1731-94-8

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

Premembranes for porogen-derived membranes and thermal decomposition of porogens was written by Eyal, A. M.;Hazan, B.;Hajdu, K.;Edelstein, D.. And the article was included in Journal of Applied Polymer Science in 1992.Recommanded Product: 143050-66-2 The following contents are mentioned in the article:

Various tert-Bu and di-tert-Bu esters, N-BOC and di-N-BOC amines, metal salts of N-BOC amino acid, and glycerol-formic acid esters are potential porogens for porogen-derived membranes. Introduction of more than 20 such compounds into polysulfone or PVC films were studied. Transparency, IR spectra, changes in glass transition temperature, and DSC were used to differentiate between mol. dispersion and formation of microphases. For many of the studied additives >10% by weight can be practically molecularly dispersed in the polymers. The upper limit of porogen concentration in premembranes depends on characteristics of the polymer and of the porogen, on casting solvent composition, and on drying procedure. Metal salts of N-BOC amino acids are suitable heat-decomposable porogens. Their decomposition in premembranes proceeds in two stages, in the first of which 2C₄H₈ + 2CO₂ are released per salt mol. The metal complex formed goes through decarboxylation at a higher temperature A heating procedure for completion of the first decomposition stage and for avoiding the second was determined This study involved multiple reactions and reactants, such as Di-tert-butyl decanedioate (cas: 143050-66-2Recommanded Product: 143050-66-2).

Di-tert-butyl decanedioate (cas: 143050-66-2) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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: 143050-66-2

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

Synthesis and immunological studies of β-1,2-mannan-peptide conjugates as antifungal vaccines was written by Liao, Jun;Pan, Bo;Liao, Guochao;Zhao, Qingjie;Gao, Yun;Chai, Xiaoyun;Zhuo, Xiaobin;Wu, Qiuye;Jiao, Binghua;Pan, Weihua;Guo, Zhongwu. And the article was included in European Journal of Medicinal Chemistry in 2019.Synthetic Route of C16H22O11 The following contents are mentioned in the article:

Fungal cell surface carbohydrates and proteins are useful antigens for the development of antifungal vaccines. In this study, glycopeptides consisting of the β-1,2-mannan and N-terminal peptide epitopes of Candida albicans (C. albicans) cell wall phosphomannan complex and Als1p (rAls1p-N) protein, resp., were synthesized and covalently conjugated with keyhole limpet hemocyanin (KLH) and human serum albumin (HSA) through homobifunctional disuccinimidyl glutarate. The resultant KLH-conjugates were immunol. evaluated using Balb/c mice to reveal that they induced high levels of IgG antibodies. Furthermore, these conjugates showed self-adjuvanting property, as they could promote robust antibody responses without the presence of an external adjuvant. More significantly, the obtained antisera could effectively recognize both the carbohydrate and the Als1 peptide epitopes and immunofluorescence and flow cytometry assays also demonstrated that the elicited antibodies could react with the cell surface of a number of fungi, including C. albicans, C. tropicalis, C. lusitaniae and C. glabrata. These results suggested the great potential of these conjugates as antifungal vaccines. 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: 604-69-3Synthetic Route 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. 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.Synthetic Route of C16H22O11

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

Parameterization of an empirical model for the prediction of n-octanol, alkane and cyclohexane/water as well as brain/blood partition coefficients was written by Zerara, Mohamed;Brickmann, Juergen;Kretschmer, Robert;Exner, Thomas E.. And the article was included in Journal of Computer-Aided Molecular Design in 2009.SDS of cas: 5003-48-5 The following contents are mentioned in the article:

Quant. information of solvation and transfer free energies is often needed for the understanding of many physicochem. processes, e.g the mol. recognition phenomena, the transport and diffusion processes through biol. membranes and the tertiary structure of proteins. Recently, a concept for the localization and quantification of hydrophobicity has been introduced (Jaeger et al., J Chem Inf Comput Sci 43:237-247, 2003). This model is based on the assumptions that the overall hydrophobicity can be obtained as a superposition of fragment contributions. To date, all predictive models for the logP have been parameterized for n-octanol/water (logP _oct) solvent while very few models with poor predictive abilities are available for other solvents. We propose a parameterization of an empirical model for n-octanol/water, alkane/water (logP _alk) and cyclohexane/water (logP _cyc) systems. Comparison of both logP _alk and logP _cyc with the logarithms of brain/blood ratios (logBB) for a set of structurally diverse compounds revealed a high correlation showing their superiority over the logP_oct measure in this context. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5SDS of cas: 5003-48-5).

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

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

GC-FID methodology validation for the fatty esters content determination in biodiesel with hexadecyl acetate as the internal standard was written by Braun, Joao V.;dos Santos, Vinicius O. B.;Fontoura, Luiz A. M.;Pereira, Evandro;Napp, Amanda;Seferin, Marcus;Lima, Jeane;Ligabue, Rosane;Vainstein, Marilene H.. And the article was included in Quimica Nova in 2017.Related Products of 1731-94-8 The following contents are mentioned in the article:

Biodiesel purity expressed as fatty esters content is one of its most important quality parameters. Although several instrumental methods have been employed, gas chromatog. with internal standard calibration has been the most used. Biodiesel is a very complex matrix, therefore finding a suitable internal standard (IS) is not straightforward. EN14103:2003 standard established Me heptadecanoate (C17:0) as IS. Since this fatty ester is naturally present in some biodiesel feedstock as tallow, that standard was reviewed in 2011, and Me nonadecanoate (C19:0) became the new IS. In turn, C19:0 produces a peak on the chromatogram that is difficult to resolve from Me linoeate (C18:2) and metyl linolenate (C18:3) ones. In this paper, a GC-FID method for the determination of the esters content in Me and Et biodiesel from canola and soy oils, using hexadecyl acetate as a new internal standard was validated. EN14103:2003 was used as reference method. Method selectivity, accuracy (t student parameter < 2.18 from both methods), repeatability (0.1-0.4%), intermediate precision (0.2-1.8%), and robustness (0.1-1.6%) were investigated and considered appropriate for the scope. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Related Products of 1731-94-8).

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. 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.Related Products of 1731-94-8

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

Sodium titanate nanotubes for efficient transesterification of oils into biodiesel was written by Zaki, Ayman H.;Naeim, Asamaa A.;EL-Dek, Samaa I.. And the article was included in Environmental Science and Pollution Research in 2019.Electric Literature of C20H40O2 The following contents are mentioned in the article:

In this work, sodium titanate nanotubes were prepared by a hydrothermal method for 23 h at 160°C and characterized by high-resolution transmission electron microscopy (HRTEM), field emission SEM (FESEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) methods, and Fourier transform IR (FT-IR) spectroscopy. The obtained nanotubes were used as catalysts in the transesterification of pure and cooked oils under different exptl. conditions (molar ratio, temperature, catalyst weight, and time). The catalyst showed high efficiency depending on the chosen conditions. The biodiesel yield was found to be 95.9% at 80°C for 2 h. The catalyst also showed high activity for cooked oil conversion, with yields of 96.0, 96.0, and 93.58% for the first, second, and third uses of oil, resp. The methanol was recycled and used in another transesterification experiment, and the biodiesel yield reached 91%. D. functional theory, Monte Carlo simulation, and mol. dynamics simulation were employed to clearly understand the transesterification mechanism. The transesterification reaction is represented by a pseudo-first-order kinetics model. [Figure not available: see fulltext.]. 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. 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. 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.Electric Literature of C20H40O2

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

Sweet sorghum stalk liquefaction in supercritical methanol: Effects of operating conditions on product yields and molecular composition of soluble fraction was written by Yan, Hong-Lei;Zong, Zhi-Min;Li, Zhan-Ku;Kong, Jiao;Zheng, Quan-Xi;Li, Yan;Wei, Xian-Yong. And the article was included in Fuel Processing Technology in 2017.Computed Properties of C20H40O2 The following contents are mentioned in the article:

Liquefaction of sweet sorghum stalk (SSS) in supercritical methanol was carried out under different conditions, including temperature, holding time, and SSS-to-methanol ratio. Each reaction mixture was filtrated to afford residue and bio-oil (BO, i.e., methanol-soluble portion). The optimal conditions were determined to be 300 °C and 30 min based on the BO yield and the maximum yield of BO is 40.5 wt% with higher heating value of 25.1 kJ g^– 1. Low SSS-to-methanol ratio, i.e., either more methanol volume or less SSS dose, benefits the BO yield. According to gas chromatograph/mass spectrometric anal., the compounds detected in the BOs can be grouped into hydrocarbons, alcs., phenolic compounds (PCs), methoxybenzenes, ketones, esters, and others. Among them, PCs and esters are the most abundant. Guaiacols and alkylphenols are predominant PCs, which were mainly originated from the decomposition of lignin in SSS. Esters can be further classified into long-chain Me esters (LCMEs), short-chain Me esters (SCMEs), di-Me diesters, and polymethyl benzenepolycarboxylates. The variation of esters mainly relied on LCME and SCME change with varied reaction conditions. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Computed Properties 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. Polyesters are important plastics, with monomers linked by ester moieties. 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.Computed Properties of C20H40O2

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