Tag: 100-200

Volatile Composition of Sparkling Wines of cv. Chardonnay Cultivated under Different Training Systems in Serra da Mantiqueira (Brazil) was written by Bernardo, Naissa Previde;Oliveira, Aline de;Mota, Renata Vieira da;Camara, Francisco Mickael de Medeiros;Peregrino, Isabela;Regina, Murillo de Albuquerque;Purgatto, Eduardo. And the article was included in Foods in 2022.Electric Literature of C11H22O2 The following contents are mentioned in the article:

The grapevine is a climbing plant and allows for the manipulation of vegetative canopies to change the microclimate and exposure of leaves and clusters to solar radiation, affecting the primary and secondary metabolisms of plants. Thus, this work aimed to evaluate how the lyre and Geneva double-curtain (GDC) training systems could contribute to the volatile composition of sparkling wines in replicates of vinifications carried out in the Serra da Mantiqueira (Brazil) in two consecutive summer harvests (2017 and 2018). Fifty-four free volatile compounds were identified by HS-SPME/GC-MS in the wines in both systems and vintages. Multivariate anal. differentiated the vintages in component 1 (22.7%) and the training systems in component 2 (7.1%). The crops were differentiated by aldehydes in 2017 and in 2018 by isoamyl acetate ester, probably derived from the amino acid leucine, the season having been more humid, with lower temperatures and less radiation. For the training systems, besides the alc. compounds, the GDC was differentiated by the terpenoid compounds geranylacetone and β-damascenone, which may contribute more pleasant aromas to sparkling wines. This work promotes addnl. research and enables winegrowers, through the management of their vineyards, to achieve sparkling wines with different volatile compositions This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Electric Literature of C11H22O2).

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. 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.Electric Literature of C11H22O2

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

Solubilities of CO₂ capture absorbents methyl benzoate, ethyl hexanoate and methyl heptanoate was written by Li, Yun;Liu, Qing;Huang, Weijia;Yang, Jie. And the article was included in Journal of Chemical Thermodynamics in 2018.Computed Properties of C8H16O2 The following contents are mentioned in the article:

Carbon capture, utilization and sequestration technol. is effective for carbon emissions reduction The development of new absorbent seems to be one of the core components of carbon capture technol. In this paper, three esters, Me heptanoate, Et hexanoate and Me benzoate, were selected to determine CO₂ solubilities at different temperatures ranging from 293.15 to 333.15 K, and pressures up to 1.2 MPa, using the isothermal synthesis method. The results showed that the absorbent with the straight-chain alkyl group was more effective for improving CO₂ absorption capacity than the benzene group. Et hexanoate showed slightly higher CO₂ solubilities than its isomer Me heptanoate. In addition, Henry’s constant and thermodn. properties such as solution enthalpy, solution entropy, solution Gibbs energy and solution heat capacity, were determined based on the measured data since the above properties are essential for designing an absorption process. Et hexanoate is superior to the other two selected absorbents, common solvents, com. absorbents, some phys. absorbents, some polymeric absorbents and some ionic liquids, which indicates that it has potential value for CO₂ capture technol. However, further studies will be necessary to assess the reliability of its industrial application. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Computed Properties of C8H16O2).

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. 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.Computed Properties of C8H16O2

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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Selective Synthesis of Non-Aromatic Five-Membered Sulfur Heterocycles from Alkynes by using a Proton Acid/N-Chlorophthalimide System was written by Yu, Wentao;Zhu, Baiyao;Shi, Fuxing;Zhou, Peiqi;Wu, Wanqing;Jiang, Huanfeng. And the article was included in Angewandte Chemie, International Edition in 2021.Application In Synthesis of Isopropylisothiocyanate The following contents are mentioned in the article:

A multicomponent strategy to achieve two different regioselectivities from alkynes, isothiocyanates and H₂O with a proton acid/N-chlorophthalimide (NCPI) system is described to selectively obtain non-aromatic five-membered sulfur heterocycles (1,3-oxathiol-2-imines/thiazol-2(3H)-one derivatives) through multiple bond formations. The process features readily available starting materials, mild reaction conditions, broad substrate scope, good functional-group tolerance, high regio- and chemoselectivities, gram-scale synthesis and late-stage modifications. Mechanistic studies support the proposal that the transformation process includes a combination of H₂O and isothiocyanate, free-radical formation, carbonation and intramol. cyclization to give the products. Furthermore, the 1,3-oxathiol-2-imine derivatives possess unique fluorescence characteristics and can be used as Pd²⁺ sensors with a “turn-off” response, demonstrating potential applications in environmental and biol. fields. Thus, e.g., PhCCPh + EtN:C:S + H₂O → I (84%, 82% isolated, Z/E = 8.5:1) in presence of Fe₂(SO₄)₃.xH₂O, NCPI and HOTf in PhF whereas treatment with NCPI and HCOOH in MeNO₂/HFIP afforded II (61%, 58% isolated). This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Application In Synthesis of Isopropylisothiocyanate).

Isopropylisothiocyanate (cas: 2253-73-8) 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. 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.Application In Synthesis of Isopropylisothiocyanate

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

Selective Synthesis of Non-Aromatic Five-Membered Sulfur Heterocycles from Alkynes by using a Proton Acid/N-Chlorophthalimide System was written by Yu, Wentao;Zhu, Baiyao;Shi, Fuxing;Zhou, Peiqi;Wu, Wanqing;Jiang, Huanfeng. And the article was included in Angewandte Chemie, International Edition in 2021.Reference of 2253-73-8 The following contents are mentioned in the article:

A multicomponent strategy to achieve two different regioselectivities from alkynes, isothiocyanates and H₂O with a proton acid/N-chlorophthalimide (NCPI) system is described to selectively obtain non-aromatic five-membered sulfur heterocycles (1,3-oxathiol-2-imines/thiazol-2(3H)-one derivatives) through multiple bond formations. The process features readily available starting materials, mild reaction conditions, broad substrate scope, good functional-group tolerance, high regio- and chemoselectivities, gram-scale synthesis and late-stage modifications. Mechanistic studies support the proposal that the transformation process includes a combination of H₂O and isothiocyanate, free-radical formation, carbonation and intramol. cyclization to give the products. Furthermore, the 1,3-oxathiol-2-imine derivatives possess unique fluorescence characteristics and can be used as Pd²⁺ sensors with a “turn-off” response, demonstrating potential applications in environmental and biol. fields. Thus, e.g., PhCCPh + EtN:C:S + H₂O → I (84%, 82% isolated, Z/E = 8.5:1) in presence of Fe₂(SO₄)₃.xH₂O, NCPI and HOTf in PhF whereas treatment with NCPI and HCOOH in MeNO₂/HFIP afforded II (61%, 58% isolated). This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Reference of 2253-73-8).

Isopropylisothiocyanate (cas: 2253-73-8) 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.Reference of 2253-73-8

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

Use of sequentially inoculation of Saccharomyces cerevisiae and Hanseniaspora uvarum strains isolated from honey by-products to improve and stabilize the quality of mead produced in Sicily was written by Prestianni, Rosario;Matraxia, Michele;Naselli, Vincenzo;Pirrone, Antonino;Badalamenti, Natale;Ingrassia, Marzia;Gaglio, Raimondo;Settanni, Luca;Columba, Pietro;Maggio, Antonella;Bruno, Maurizio;Francesca, Nicola;Moschetti, Giancarlo;Alfonzo, Antonio. And the article was included in Food Microbiology in 2022.Reference of 2198-61-0 The following contents are mentioned in the article:

Mead is a beverage produced by alc. fermentation of honey-must. The starter yeasts that are commonly used for the alc. fermentation of honey-must are oenol. Saccharomyces cerevisiae strains. The objective of the present work was, for the first time, to apply yeasts of honey byproducts origin to evaluate the influences the taste-olfactory attributes of mead. For this purpose, three exptl. productions were set up, which included: (i) single inoculation of S. cerevisiae; (ii) single inoculation of Hanseniaspora uvarum; (iii) sequential inoculation of H. uvarum/S. cerevisiae. Two control trials were performed, using a com. strain of S. cerevisiae of oenol. origin and a spontaneous fermentation The results of the chem. parameters showed differences between the trials in terms of residual sugars, acetic acid, glycerol, ethanol and volatile organic compounds Sensorial anal. also showed a high heterogeneity among trials. The attributes of sweetness, honey and floral were found in mead fermented with H. uvarum, whereas all meads obtained with S. cerevisiae were dry, balanced and without off-odors and off-flavours. The results obtained showed that the controlled application of conventional and non-conventional yeast strains isolated from honey byproducts origin could be a promising approach to improve the quality of meads. This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Reference of 2198-61-0).

Isopentyl hexanoate (cas: 2198-61-0) 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. 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.Reference of 2198-61-0

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

Use of sequentially inoculation of Saccharomyces cerevisiae and Hanseniaspora uvarum strains isolated from honey by-products to improve and stabilize the quality of mead produced in Sicily was written by Prestianni, Rosario;Matraxia, Michele;Naselli, Vincenzo;Pirrone, Antonino;Badalamenti, Natale;Ingrassia, Marzia;Gaglio, Raimondo;Settanni, Luca;Columba, Pietro;Maggio, Antonella;Bruno, Maurizio;Francesca, Nicola;Moschetti, Giancarlo;Alfonzo, Antonio. And the article was included in Food Microbiology in 2022.Electric Literature of C10H20O2 The following contents are mentioned in the article:

Mead is a beverage produced by alc. fermentation of honey-must. The starter yeasts that are commonly used for the alc. fermentation of honey-must are oenol. Saccharomyces cerevisiae strains. The objective of the present work was, for the first time, to apply yeasts of honey byproducts origin to evaluate the influences the taste-olfactory attributes of mead. For this purpose, three exptl. productions were set up, which included: (i) single inoculation of S. cerevisiae; (ii) single inoculation of Hanseniaspora uvarum; (iii) sequential inoculation of H. uvarum/S. cerevisiae. Two control trials were performed, using a com. strain of S. cerevisiae of oenol. origin and a spontaneous fermentation The results of the chem. parameters showed differences between the trials in terms of residual sugars, acetic acid, glycerol, ethanol and volatile organic compounds Sensorial anal. also showed a high heterogeneity among trials. The attributes of sweetness, honey and floral were found in mead fermented with H. uvarum, whereas all meads obtained with S. cerevisiae were dry, balanced and without off-odors and off-flavours. The results obtained showed that the controlled application of conventional and non-conventional yeast strains isolated from honey byproducts origin could be a promising approach to improve the quality of meads. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Electric Literature of C10H20O2).

Octyl acetate (cas: 112-14-1) 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. 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 C10H20O2

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

Production of aryl oxygen-containing compounds via catalytic pyrolysis of bagasse lignin over La_0.8M_0.2FeO₃ (M=La, Ca, Sr, Ba) was written by Wang, Haiying;Han, Hongjing;Sun, Enhao;Zhang, Yanan;Li, Jinxin;Chen, Yanguang;Song, Hua;Zhao, Hongzhi;Kang, Yue. And the article was included in Journal of Analytical and Applied Pyrolysis in 2019.Recommanded Product: 763-69-9 The following contents are mentioned in the article:

A new method named the production of aryl oxygen-containing compounds via catalytic pyrolysis of bagasse lignin (BL) over perovskites, La_0.8M_0.2FeO₃ (M = La, Ca, Sr, Ba) was proposed. La_0.8M_0.2FeO₃ (M = La, Ca, Sr, Ba) samples were synthesized by the sol-gel method (SG) and characterized by XRD, SEM, BET and XPS, and their catalytic pyrolysis performances were evaluated by the test of TG and the evaluation of the fixed bed microreactor. Under the action of perovskites, the pyrolysis of BL was promoted, the yields of gaseous and solid products decreased while the yield of liquid products increased by 10-20%; decarboxylation and decarbonylation could be inhibited, and it was conducive to the fracture of aliphatic hydrocarbon side chains on aromatic rings, as a result, the selectivity of CO₂/CO decreased while the selectivity of hydrocarbons in gaseous products increased; the total selectivity of aryl oxygen-containing compounds increased from 56 weight% in the liquid product obtained from pure BL pyrolysis to more than 69 weight% in that of catalytic pyrolysis of BL. The spent catalyst was regenerated after controlled combustion of solid product-char, and it showed good structural and catalytic stabilities after 5 successful redox cycles. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Recommanded Product: 763-69-9).

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. 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.Recommanded Product: 763-69-9

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

Comparison of volatile compounds in two brandies using HS-SPME coupled with GC-O, GC-MS and sensory evaluation was written by Zhao, Y. P.;Wang, L.;Li, J. M.;Pei, G. R.;Liu, Q. S.. And the article was included in South African Journal of Enology and Viticulture in 2011.COA of Formula: C7H14O3 The following contents are mentioned in the article:

The aim of this study was to compare the volatile compounds between Changyu XO and Hennessy XO. Sensory evaluation was performed by a panel of tasters. Qual. and semi-quant. anal. was achieved by headspace solid phase micro-extraction (HS-SPME), coupled with gas chromatog.-mass spectrometry (GC-MS) and gas chromatog.-olfactometry (GC-O). A total of 160 volatile compounds were identified in the two brands of brandy. Of these, 118 compounds were common to both Changyu XO and Hennessy XO; 18 compounds were specific to Changyu XO and 24 were specific to Hennessy XO. A total of 85 aroma compounds responsible for brandy flavor were identified by GC-O, of which 68 were common to both brands, while seven and ten were specific to Changyu XO and Hennessy XO, resp. The study provided detailed information about the compounds responsible for the characteristic flavor of specific brandies. According to statistical anal., significant differences were recorded between Changyu XO and Hennessy XO. Most volatile compounds in Changyu XO occurred at lower concentrations than those in Hennessy XO. Based on sensory evaluation anal., the floral, alc. and rancid aroma descriptors achieved higher scores in Changyu XO and Hennessy XO, while the lime aroma seemed specific to Hennessy XO. Herb and almond aromas were specific to Changyu XO. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9COA of Formula: C7H14O3).

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. 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.COA of Formula: C7H14O3

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

Bioproducts from forest biomass: Essential oils and hydrolates from wastes of Cupressus lusitanica Mill. and Cistus ladanifer L. was written by Tavares, Claudia S.;Martins, Alice;Faleiro, M. Leonor;Miguel, M. Graca;Duarte, Luis C.;Gameiro, Jose A.;Roseiro, Luisa B.;Figueiredo, A. Cristina. And the article was included in Industrial Crops and Products in 2020.Related Products of 2198-61-0 The following contents are mentioned in the article:

The antimicrobial activity of EOs was studied by disk agar diffusion method against Escherichia coli, Staphylococcus aureus and Candida albicans. Antioxidant activity of EOs and Hs was evaluated by 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) free radical, superoxide anion radical formation, xanthine oxidase and chelating metal ions assays. Anti-inflammatory activity of Hs was assessed by albumin denaturation assay. Monoterpene hydrocarbons and oxygen-containing monoterpenes dominated C. lusitanica EO (SD, 82-86%, HD, 80-85%) and Hs volatiles (SD, 93-94%; HD 64-81%), resp. α-Pinene (14-36%), limonene (8-21%), δ-3-carene (8-19%) and sabinene (6-18%) were the main EO constituents. C. ladanifer EOs were dominated by monoterpene hydrocarbons (SD, 48-80% and HD, 29%) and Hs by oxygen-containing monoterpenes (SD, 38-43%, HD, 39%). The EO major constituents were α-pinene (13-28%) and camphene (5-25%), whereas 2,6,6-tri-Me cyclohexanone (2-12%) and trans-pinocarveol (5-13%) dominated the Hs volatiles. This study reports for the first time the chem. composition of the hydrolate volatiles of these two species and their anti-inflammatory properties. Among the studied biol. activities, the EOs showed the best antioxidant properties while Hs demonstrated higher anti-inflammatory activity. This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Related Products of 2198-61-0).

Isopentyl hexanoate (cas: 2198-61-0) 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. 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.Related Products of 2198-61-0

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

Application of lactic acid bacteria for improving the quality of reduced-salt dry fermented sausage: Texture, color, and flavor profiles was written by Hu, Yingying;Li, Yongjie;Li, Xiang-ao;Zhang, Hongwei;Chen, Qian;Kong, Baohua. And the article was included in LWT–Food Science and Technology in 2022.Application In Synthesis of Methyl heptanoate The following contents are mentioned in the article:

The traditional dry sausage is highly appreciated in China because of its unique quality characteristics, but it contains high salt content. Hence, this study aimed to evaluate the effects of lactic acid bacteria (LAB) comprising Lactobacillus sakei (LS), Lactobacillus curvatus (LC), Lactobacillus plantarum (LP), and Weissella hellenica (WH) on the quality attributes of the reduced-salt dry fermented sausages. The results indicated that the LP sausage showed higher (P < 0.05) shear force value compared to the other sausages, while the LP, LC, and WH sausages had higher (P < 0.05) lightness values than the control sausages. Seventy-six volatile compounds were detected, and nine compounds were identified as the key differential volatile compounds among the sausages based on partial least squares discriminant anal. Clustering anal. of electronic nose results corresponded well to the volatile compound results. The sensory evaluation confirmed that the inoculation with LC and LP had a pos. impact on the aroma, color, and hardness attributes of the reduced-salt sausages. Besides, partial least squares regression anal. further indicated that L. curvatus and L. plantarum could be used as the potential starter cultures to manufacture reduced-salt dry fermented sausage having improved texture, color, and flavor. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Application In Synthesis of Methyl heptanoate).

Methyl heptanoate (cas: 106-73-0) 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.Application In Synthesis of Methyl heptanoate

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