Tag: 200-300

Striking changes in volatile profiles at sub-zero temperatures during over-ripening of ‘Beibinghong’ grapes in Northeastern China was written by Lan, Yi-Bin;Qian, Xu;Yang, Zhong-Jun;Xiang, Xiao-Feng;Yang, Wei-Xi;Liu, Tao;Zhu, Bao-Qing;Pan, Qiu-Hong;Duan, Chang-Qing. And the article was included in Food Chemistry in 2016.SDS of cas: 5444-75-7 The following contents are mentioned in the article:

The evolution of free and glycosidically bound volatile compounds in ‘Beibinghong’ (Vitis vinifera × Vitis amurensis) grape berries throughout on-vine over-ripening and freezing processes was studied in two vintages. The aroma profiles of ‘Beibinghong’ icewine berries were characterized by C6 compounds, higher alcs. and terpenoids in free fractions and carbonyl compounds, higher alcs., C6 alcs. and terpenoids in bound fractions. With regard to free volatile compounds, there was a decrease in the concentration of C6 compounds, terpenols and norisoprenoids and an increase of terpene oxides during over-ripening process. A striking alteration of volatile profile occurred at sub-zero temperatures, particularly for the free fractions such as C6 alcs., higher alcs. and oxidative terpene derivatives These changes were attributed to a series of reactions (biotransformation, oxidation and anaerobic metabolism) induced by water loss and especially freeze-thaw cycles. PCA revealed temperature and rainfall affected the accumulation of volatile compounds during over-ripening processes. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7SDS of cas: 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. 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: 5444-75-7

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

Film-forming aid selection to optimize performance and minimize volatile organic content was written by Strepka, Arron M.;Arendt, William D.;Joshi, Makarand. And the article was included in Proceedings of the International Waterborne, High-Solids, and Powder Coatings Symposium in 2007.Application of 5444-75-7 The following contents are mentioned in the article:

Solvents and highly volatile coalescing aids have traditionally been utilized in waterborne coatings applications to assist in the formation of a continuous film. These materials behave like temporary plasticizers. They soften the polymer long enough to allow coalescence and later evaporate from the coating, leaving behind a durable film. While these materials are effective as film formers, they also contribute significantly to the volatile organic content (VOC) of the coating formulation. More permanent film formation aids are significantly less volatile and can be utilized to promote coalescence. The purpose of this paper is to demonstrate the benefits of incorporating less volatile film-forming aids to lower total formulary VOC. Traditional and new film-formation aid technologies have been evaluated in architectural and industrial waterborne coating formulations to demonstrate advantages. Volatility, low temperature coalescence, freeze thaw stability, blocking resistance, hardness, application and other coating properties are utilized to demonstrate the advantages of this strategy. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Application of 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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.Application of 5444-75-7

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

Chemically and enzymatically catalyzed synthesis of C₆-C₁₀ alkyl benzoates was written by Krause, Przemyslaw;Hilterhaus, Lutz;Fieg, Georg;Liese, Andreas;Bornscheuer, Uwe. And the article was included in European Journal of Lipid Science and Technology in 2009.Recommanded Product: 5444-75-7 The following contents are mentioned in the article:

The esterification of benzoic acid with n-hexanol, n-octanol, 2-ethylhexanol and n-decanol was investigated in detail. An anal. of the reaction kinetics of esterification in the presence of different com. available chem. catalysts was carried out. The effects of catalyst type and loading on the reaction rate were studied. Although the considered reaction is bimol., it showed a first-order behavior, and a linear dependence with respect to the catalyst concentration was observed Hence, a new approach is presented to describe the reaction kinetics accurately over a wide range. The application of biotechnol. synthesis applying different enzymes as catalysts offers an interesting alternative besides chem. synthesis. Especially an esterase from Bacillus subtilis immobilized on Sepabeads EC-EP showed high stability and was applied for 2 days in the synthesis of hexyl benzoate. Nevertheless, the chem. reaction route remains superior with respect to the catalyst activities under the applied conditions, which were 25 kU/g for the chem. reaction and 0.7 kU/g for the best enzymic conversion. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Recommanded Product: 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. Recommanded Product: 5444-75-7

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

Characterization of chemical isolates of Caryopteris odorata was written by Shahzadi, Tayyaba;Abbasi, Muhammad Athar;Aziz-Ur-Rehman;Riaz, Tauheeda;Khan, Khalid Mohammed;Ahmad, Viqar Uddin;Ashraf, Muhammad;Hussain, Bushra;Ajaib, Muhammad. And the article was included in Journal of the Chemical Society of Pakistan in 2012.Category: esters-buliding-blocks The following contents are mentioned in the article:

The phytochem. investigation of the chloroform soluble fraction of Caryopteris odorata (Ham. ex Roxb.) led to the isolation of one new constituent namely; n-pentadecyl[3-(4-hydroxyphenyl)] propanoate (I). The compounds 2-ethyl-n-hexyl benzoate (2), 2-ethyl-n-hexyl trans-cinnamate (3) bis-dodecylbenzene-1,4-dicarboxylate (4) were reported synthetically but these have been isolated for the first time from a natural source. Similarly, the known constituent like trans-cinnamic acid (5) and cis-cinnamic acid (6), heneicosanoic acid (7), Me tricontanoate (8) and octacosanyl tricontanoate (9) were also obtained for the first time from this plant source. The structures of these compounds were determined by IR, HR-MS, ¹H-NMR, ¹³C-NMR spectroscopy and by comparison with the published data of the closely related compounds These isolates were screened for their antioxidant, anti-urease and anti-tyrosinase activities and results revealed that n-Pentadecyl [3-(4-hydroxyphenyl)] propanoate (1) exhibits good antioxidant potential with low to zero enzyme inhibition activities. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Category: esters-buliding-blocks).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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. 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.Category: esters-buliding-blocks

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

Analysis of fermentation rule and aromatic composition of olive wine fermented with different species of yeast strains was written by Jiang, Yi-ming;Li, Ji-tao;Wu, Xue-ying;Shu, Jun-xia;Cheng, Li-ping;Jiang, He-ti. And the article was included in Shipin Gongye Keji in 2014.Electric Literature of C15H22O2 The following contents are mentioned in the article:

Using olive as raw materials, the variations of alc. degree, reducing sugar and total acidity were tracked during the whole fermentation of olive wines fermented with three different species of yeast strains. The aromatic compositions of olive wines were extracted The results showed that alc. degree increased gradually, reducing sugar decreased gradually and total acidity increased then decreased during the whole fermentation process fermented with three different species of yeast strains. The fermentation cycle of alc. active dry yeast was shortest. In the olive wine fermented with Saccharomyces cerevisia 1383, alc. degree was highest, reducing sugar was least and total acidity was least. And 50, 49 and 52 kinds of aromatic compounds were identified in olive wines fermented with the Saccharomyces cerevisia 1383, alc. active dry yeast and Saccharomyces cerevisia 1596, resp., and 35 kinds of aromatic compounds were same in the there olive wines. The main aromatic compositions were isopentanol. It was initially identified that olive wine fermented with the Saccharomyces cerevisia 1383 was best. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Electric Literature of C15H22O2).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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.Electric Literature of C15H22O2

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

Correlation of the abbe number, the refractive index, and glass transition temperature to the degree of polymerization of norbornane in polycarbonate polymers was written by Kato, Noriyuki;Ikeda, Shinya;Hirakawa, Manabu;Ito, Hiroshi. And the article was included in Polymers (Basel, Switzerland) in 2020.COA of Formula: C13H10O3 The following contents are mentioned in the article:

The influences of the average d.p. (D_p), which is derived from Mn and terminal end group, on optical and thermal properties of various refractive indexed transparent polymers were investigated. In this study, we selected the alicyclic compound, Dinorbornane dimethanol (DNDM) homo polymer, because it has been used as a representative monomer in low refractive index polymers for its unique properties. DNDM monomer has a stable amorphous phase and reacts like a polymer. Its unique reaction allows continuous investigation from monomer to polymer. For hydroxy end group and phenolic end group polymers, the refractive index (n_d) decreased with increasing D_p, and both converged to same value in the high D_p region. However, the Abbe number (ν_d) of a hydroxy end group polymer is not dependent on D_p, and the νvd of a phenolic end group polymer is greatly dependent on D_p. As for glass transition temperatures (T_g), both end group series were increased as D_p increased, and both converged to the same value. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0COA of Formula: C13H10O3).

Diphenyl carbonate (cas: 102-09-0) 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. 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: C13H10O3

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

Thermal and Mechanical Properties of Triazole Cross-Linked Glycidyl Azide (GAP) and Azido Polycarbonate Networks was written by St-Charles, Jean-Christophe;Dubois, Charles. And the article was included in Propellants, Explosives, Pyrotechnics in 2020.Related Products of 102-09-0 The following contents are mentioned in the article:

Triazole cross-linked energetic polymer networks obtained from the reaction of dialkyne curing agents with glycidyl azide polymers (GAP) or poly(2,2-[bisazidomethyl]propane-1,3-diyl carbonate) (poly[BAMPC]) were studied, and their thermal and mech. properties are reported. The dialkynes studied include bis(propargyl)ether (BPE), bis(propargyl)malonate (BPM), and 4,4â€?diacyanohepta-1,6-diyne (DCHD), three compounds previously described as curing agents for glycidyl azide pre-polymers. The cured polymer networks display a wide range of properties dependent on the nature of the azido pre-polymer, the nature of the dialkyne, the alkyne/azide molar ratio, and the mol. weight of the pre-polymer used. Results confirm that the three dialkynes are effective curing agents able to form rigid networks out of either pre-polymer and that the lighter mol. weight BPE and DCHD both improve mech. properties of cured networks with less dilution of the system′s energetic content. Triazole cross-linked poly(BAMPC) networks were studied for the first time, and promising phys. and mech. properties are reported. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Related Products of 102-09-0).

Diphenyl carbonate (cas: 102-09-0) 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. Related Products of 102-09-0

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

Study on chemical compositions and antimicrobial activity of the volatile oil of Dictyophora echinovalvata was written by Tan, Dongfei;Wu, Ruojing;Liang, Ming;Lin, Yuexin. And the article was included in Junwu Xitong in 2002.Recommanded Product: (E)-Dodeca-9,11-dien-1-yl acetate The following contents are mentioned in the article:

The volatile oil of Dictyophora echinovalvata was extracted by water-steaming method with ether as extractant and the extraction rate was 0.45%. The chem. compositions of the volatile oil had been separated and identified by means of Gas Chromatog.-Mass Spectrometry. Twenty nine compositions were identified from 36 separated peaks, and the major components were oxacyclotetradecan-2-one, 13-methyl- (23.53%), 9,12-octadecadienoic acid (Z,Z)- (17.56%), selinene (12.37%), hexadecanoic acid (8.20%), 9-hexadecenoic acid (7.84%), (-)-lepidozenal (7.82%), etc., which were made up to 97.76% of the quantity of volatile oil. The antimicrobial activity of the volatile oil was preliminarily tested in the suspensions of Escherichia coli, Staphylococcus aureus, Saccharomyces cerevisiae, Candida albicans, Aspergillus niger, Penicillium chrysogenum and Rhizopus nigricans, resp., when the volatile oil was diluted by 100 times, 50 times and 25 times. The results showed that P. chrysogenum and S. cerevisiae were the most sensitive, next R. nigricans and A. niger, and then C. albicans, S. aureus and E. coli. This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7Recommanded Product: (E)-Dodeca-9,11-dien-1-yl acetate).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) 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. 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: (E)-Dodeca-9,11-dien-1-yl acetate

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

A lanthanide MOF catalyst with an excellent thermal stability for the synthesis of polycarbonate diol was written by Wang, Liping;He, Jiao;Chen, Xueying;Lv, Yanling. And the article was included in Journal of the Iranian Chemical Society in 2020.Product Details of 102-09-0 The following contents are mentioned in the article:

A lanthanide metal-organic framework (MOF) Yb(BTC)(H₂O)·(DMF) (BTC = 1,3,5-benzenetricarboxylate, DMF = N,N-dimethylformamide) was prepared from Yb(NO₃)₃·5H₂O and H₃BTC using the solvothermal method and characterized by Fourier transform IR spectroscopy, X-ray diffraction, thermogravimetric anal., SEM, N₂ adsorption-desorption technol., and temperature-programmed desorption. The results show that Yb(BTC)(H₂O)·(DMF) is a lanthanide MOF with an excellent thermal stability. The coordinated water mols. and DMF guest mols. were removed from the channels by calcination to form a porous solid Yb (BTC) with coordinatively unsaturated Yb³⁺ sites. The BET surface area and pore size of Yb(BTC) are 695 m²/g and 0.68 nm, resp. As a heterogeneous Lewis acid catalyst, the activity of Yb(BTC) for the synthesis of polycarbonate diol (PCDL) via transesterification between di-Ph carbonate and diol was investigated. Compared with nine reported catalysts, Yb(BTC) exhibits the highest catalytic activity for the synthesis of PCDL. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Product Details of 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. 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.Product Details of 102-09-0

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

Biodestruction of Phthalic Acid Esters by White Rot Fungi was written by Savinova, O. S.;Shabaev, A. V.;Glazunova, O. A.;Eremin, S. A.;Fedorova, T. V.. And the article was included in Applied Biochemistry and Microbiology in 2022.Reference of 5444-75-7 The following contents are mentioned in the article:

The ability of white rot fungi from different ecophysiol. groups (primary wood-destroying saprotroph Trametes hirsuta, secondary wood-destroying saprotroph Steccherinum ochraceum, litter saprotroph Crucibulum laeve, and humic saprotroph Agrocybe praecox) to degrade phthalic acid esters (PAEs) was studied. It was shown that diethylhexyl phthalate (DEHP) with longer and branched hydrocarbon chains was more rapidly biodegraded by wood-destroying saprotrophs such as T. hirsuta and S. ochraceum, with an efficiency of more than 99%. Di-Bu phthalate (DBP), which is less hydrophobic with shorter hydrocarbon units, was most efficiently transformed by the litter saprotroph C. laeve (up to 96.5%). Di-Et phthalate (DEP) proved to be the most toxic to all fungi. T. hirsuta showed the greatest resistance to elevated DEP concentrations in the medium. It has been shown that fungi destroy PAEs with the formation of various metabolites, depending on the composition of the multienzyme complex of the fungus. Among the secondary metabolites, ionol, an antioxidant formed by fungi when PAEs is added to the medium, was found. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Reference of 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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.Reference of 5444-75-7

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