Tag: 100-200

Anatomical structure of venom gland and venom composition analysis of Sirex noctilio was written by Wang, Zhengtong;Yang, Huawei;Li, Biying;Ren, Lili;Shi, Juan. And the article was included in Dongbei Linye Daxue Xuebao in 2021.Computed Properties of C4H7NS The following contents are mentioned in the article:

With Sirex noctilio collected from infected areas in Heilongjiang and Inner Mongolia, the anatomical locations of the venom gland and venom reservoir were observed by dissecting the abdomen of female adult S. noctilio and their structural characteristics were observed under a microscope. The temperature was set at 50°C and the venom composition was analyzed at 5°C/min to 200°C with Thermo Scientific GC-MS. The venom gland and venom reservoir were located at the base of S. noctilio ovipositor. The venom reservoir was translucent crystalline tissue with the size of green beans, and its structural features is beneficial for S. noctilio to store as many venoms as possible. Venoms, among which fatty acids account for the major proportion, contain alkaloids, sugars and glycosides, fatty acids and proteins. The fatty acids include palmitic acid, palmitoleic acid, stearic acid and stearic acid, and the proteins in the venom component may be the active substances that cause damage to the host trees. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Computed Properties of C4H7NS).

Isopropylisothiocyanate (cas: 2253-73-8) 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. 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.Computed Properties of C4H7NS

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

Anatomical structure of venom gland and venom composition analysis of Sirex noctilio was written by Wang, Zhengtong;Yang, Huawei;Li, Biying;Ren, Lili;Shi, Juan. And the article was included in Dongbei Linye Daxue Xuebao in 2021.Application In Synthesis of Isopropylisothiocyanate The following contents are mentioned in the article:

With Sirex noctilio collected from infected areas in Heilongjiang and Inner Mongolia, the anatomical locations of the venom gland and venom reservoir were observed by dissecting the abdomen of female adult S. noctilio and their structural characteristics were observed under a microscope. The temperature was set at 50°C and the venom composition was analyzed at 5°C/min to 200°C with Thermo Scientific GC-MS. The venom gland and venom reservoir were located at the base of S. noctilio ovipositor. The venom reservoir was translucent crystalline tissue with the size of green beans, and its structural features is beneficial for S. noctilio to store as many venoms as possible. Venoms, among which fatty acids account for the major proportion, contain alkaloids, sugars and glycosides, fatty acids and proteins. The fatty acids include palmitic acid, palmitoleic acid, stearic acid and stearic acid, and the proteins in the venom component may be the active substances that cause damage to the host trees. 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. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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 Isopropylisothiocyanate

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

Characterization of the aromatic profile of purple passion fruit (Passiflora edulis Sims) during ripening by HS-SPME-GC/MS and RNA sequencing was written by Li, Changbao;Xin, Ming;Li, Li;He, Xuemei;Yi, Ping;Tang, Yayuan;Li, Jiemin;Zheng, Fengjin;Liu, Guoming;Sheng, Jinfeng;Li, Zhichun;Jian, sun. And the article was included in Food Chemistry in 2021.Application In Synthesis of Isopentyl hexanoate The following contents are mentioned in the article:

Passion fruit is a tropical liana of the Passiflora family that is commonly consumed throughout the world due to its attractive aroma and flavor. However, very limited information is available on the mechanism of aroma formation and composition of the passion fruit during ripening. Therefore, HS-SPME-GC/MS combined with transcriptome anal. was used to study the mechanism of aroma formation during passion fruit ripening. The profile analyzed included 148 volatile organic compounds (VOCs) and related differentially expressed genes (DEGs). Compared with SA, 85 VOCs and related DEGs were identified as significantly upregulated at the SB and SC stages, including esters, alcs., ketones, hydrocarbons, alkanes, and aldehydes. Two main pathways, ester and amino acid metabolism, and related genes were analyzed with VOC biosynthesis in passion fruit. This study is the first anal. of passion fruit VOC formation and provides new insights into the flavor mechanism and quality breeding of passion fruit. This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Application In Synthesis of Isopentyl hexanoate).

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, including apples, durians, pears, bananas, pineapples, and strawberries. 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.Application In Synthesis of Isopentyl hexanoate

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

A β-cyclodextrin covalent organic framework used as a chiral stationary phase for chiral separation in gas chromatography was written by Tang, Bo;Wang, Wei;Hou, Huipeng;Liu, Yiquan;Liu, Zongkun;Geng, Lina;Sun, Liquan;Luo, Aiqin. And the article was included in Chinese Chemical Letters in 2022.Recommanded Product: Methyl heptanoate The following contents are mentioned in the article:

Chiral covalent organic frameworks (CCOFs) featuring chirality, stability, and good porosity have attracted a considerable amount of attention due to their important applications, such as asym. catalysis, chiral separation, and chiral recognition. In this study, a β-cyclodextrin (β-CD) covalent organic framework (β-CD-COF) diluted with polysiloxane OV-1701 was explored as a novel chiral stationary phase (CSP) for gas chromatog. (GC) separation of racemates. The β-CD-COF coated capillary column had excellent selectivity, not only for the separation of linear alkanes, linear alcs., fatty acid Me esters mixture, the Grob mixture and positional isomers, but also for the resolution of chiral compounds, including chiral alcs., aldehydes, ethers, and amino acid derivatives In addition, the β-CD-COF-coated capillary column presented good repeatability and reproducibility. This work indicated the great potential of the CCOFs coated capillary column for the chromatog. separation of enantiomers. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Recommanded Product: Methyl heptanoate).

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

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

Insights into profiling of volatile ester and LOX-pathway related gene families accompanying post-harvest ripening of Nanguo pears was written by Luo, Manli;Zhou, Xin;Sun, Huajun;Zhou, Qian;Ge, Wanying;Sun, Yangyang;Yao, Miaomiao;Ji, Shujuan. And the article was included in Food Chemistry in 2021.Computed Properties of C10H20O2 The following contents are mentioned in the article:

Nanguo pear is particularly renowned for its fragrance. Esters are the main components of its aroma, which are synthesized primarily by the LOX pathway. We identified the main volatile esters and critical gene family members involved in the LOX pathway by monitoring their variation accompanying post-harvest ripening and examining their roles through principal component anal. (PCA), partial least-square regression (PLSR), and correlation anal. In pears ripening to the optimum taste period (OTP), components and contents of volatile esters reached a peak, of which Et butanoate, Et hexanoate, and hexyl acetate were most prominent. Linoleic acid and linolenic acid contents rose greatly until OTP and then declined; the activities of LOX, alc. dehydrogenase (ADH), and alc. acyltransferase (AAT) increased progressively until the OTP. Among the genes involved in LOX-pathway, the expressions of PuLOX3, PuADH3, and PuAAT contributed most to changes of total ester and main esters in Nanguo pears. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Computed Properties of C10H20O2).

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

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

Gene expression programming strategy for estimation of flash point temperature of non-electrolyte organic compounds was written by Gharagheizi, Farhad;Ilani-Kashkouli, Poorandokht;Farahani, Nasrin;Mohammadi, Amir H.. And the article was included in Fluid Phase Equilibria in 2012.Safety of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

The accuracy and predictability of correlations and models to determine the flammability characteristics of chem. compounds are of drastic significance in various chem. industries. In the present study, the main focus is on introducing and applying the gene expression programming (GEP) math. strategy to develop a comprehensive empirical method for this purpose. This work deals with presenting an empirical correlation to predict the flash point temperature of 1471 (non-electrolyte) organic compounds from 77 different chem. families. The parameters of the correlation include the mol. weight, critical temperature, critical pressure, acentric factor, and normal b.p. of the compounds The obtained statistical parameters including root mean square of error of the results from DIPPR 801 data (8.8, 8.9, 8.9 K for training, optimization and prediction sets, resp.) demonstrate improved accuracy of the results of the presented correlation with respect to previously-proposed methods available in open literature. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Safety 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. 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.Safety of Ethyl 3-ethoxypropanoate

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

Development of a stir bar sorptive extraction method to study different beer styles volatile profiles. was written by Ruvalcaba, Jose E.;Duran-Guerrero, Enrique;Barroso, Carmelo G.;Castro, Remedios. And the article was included in Food Research International in 2019.Recommanded Product: 112-14-1 The following contents are mentioned in the article:

A stir bar sorptive extraction method coupled to Gas Chromatog.-Mass Spectrometry for the anal. of 52 volatile compounds in beer has been developed. The final optimized conditions were: 50 mL sample volume, 180 min extraction time, 25% (w/v) NaCl content and polydimethylsyloxane stir bars. Good values of linearity (R² > 0.99) were achieved for the calibration lines of all the compounds The limits of detection and quantification obtained were low enough for the determination of the volatile compounds in the samples and the recovery values obtained for the majority of the compounds were between 80% and 120%. The precision of the method was also studied and acceptable values for this type of extraction technique were obtained (<20%). 30 samples of different styles of beers (ale, lager, stout and wheat) were analyzed and their aromatic profile was characterised. Multivariate statistical techniques allowed the correct classification of the samples according to their volatile composition This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Recommanded Product: 112-14-1).

Octyl acetate (cas: 112-14-1) 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.Recommanded Product: 112-14-1

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

The diversity of effects of yeast derivatives during sparkling wine aging was written by Ignacia Lambert-Royo, Maria;Ubeda, Cristina;Del Barrio-Galan, Ruben;Sieczkowski, Nathalie;Miquel Canals, Joan;Pena-Neira, Alvaro;Gil i Cortiella, Mariona. And the article was included in Food Chemistry in 2022.Name: Isopentyl hexanoate The following contents are mentioned in the article:

This study shows the monitoring of the phys., chem. and sensorial changes that occur in the sparkling wine along 18 mo of aging due to different typol. yeast-derived products; dry inactivated yeast from Saccharomyces (Saccharomyces cerevisiae) and non-Saccharomyces (Torulaspora delbrueckii) yeast strains, yeast autolyzate, and yeast protein extract tested at two different doses. The addition of 5 g/hL yeast protein extract and inactivated yeast from T. delbrueckii helped to preserve esters in wines with 9 and 18 mo of aging on lees. The addition of yeast autolyzate achieved greater polysaccharide enrichment and gave rise to sparkling wines with the highest antioxidant activity. Effects on foaming properties were quite different depending on the aging time. Despite this, sparkling wines treated with 10 g/hL of yeast autolyzate and Optimum White generally exhibited the highest foamability and foam stability. Further experiments with higher doses are needed to observe clear effects on sensory profile. This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Name: Isopentyl hexanoate).

Isopentyl hexanoate (cas: 2198-61-0) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Name: Isopentyl hexanoate

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

A Ru-Sn-Co/AlO(OH) as a highly efficient catalyst for hydrogenation of dimethyl adipate to 1,6-hexanediol in aqueous phase was written by Jiang, Hong-Bin;Jiang, Hai-Jun;Su, Ke;Zhu, De-Ming;Zheng, Xue-Li;Fu, Hai-Yan;Chen, Hua;Li, Rui-Xiang. And the article was included in Applied Catalysis, A: General in 2012.Computed Properties of C9H16O4 The following contents are mentioned in the article:

A Ru-Sn-Co/AlO(OH) catalyst was prepared by co-impregnation, calcination, and hydrothermal reduction The catalyst was well characterized by BET, x-ray diffraction, SEM-EDX, XPS, H₂-TPR, and Mossbauer spectroscopy, and then it was applied in the hydrogenation of di-Me adipate to 1,6-hexanediol in aqueous phase. It was found that the addition of cobalt could stabilize Sn(IV) and the cooperation between tin and cobalt could promote the reduction of ruthenium oxide. The γ-Al₂O₃ in the catalyst Ru-Sn-Co/γ-Al₂O₃ was transformed to AlO(OH) by the hydrothermal reduction It was suggested that the stabilized Sn(IV) and the interaction between the hydroxyl group on the surface of AlO(OH) and the solvent water played a key role to improve the conversion of di-Me adipate and the selectivity to 1,6-hexanediol. The conversion of di-Me adipate and the selectivity to 1,6-hexanediol were up to 98% and 95%, resp., under 5 MPa of H₂ and 493 K for 10 h. This study involved multiple reactions and reactants, such as Ethyl methyl adipate (cas: 18891-13-9Computed Properties of C9H16O4).

Ethyl methyl adipate (cas: 18891-13-9) 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. 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 C9H16O4

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

Liquefaction of giant fennel (Ferula orientalis L.) in supercritical organic solvents: Effects of liquefaction parameters on product yields and character was written by Aysu, Tevfik;Kucuk, Mehmet Masuk. And the article was included in Journal of Supercritical Fluids in 2013.Synthetic Route of C7H14O3 The following contents are mentioned in the article:

Ferula orientalis L. stalks were liquefied in an autoclave in supercritical organic solvents (methanol, ethanol, 2-propanol, acetone and 2-butanol) with (NaOH, Na₂CO₃, ZnCl₂) and without catalyst at five different temperatures ranging from 240°C to 320°C. The amounts of solid (unconverted raw material), liquid (bio-oil) and gas produced, as well as the composition of the resulting liquid phase, were determined The effects of various parameters such as temperature, solvent, catalyst and ratio of catalyst on product yields were investigated. The results showed that conversion highly depends on the temperature and catalyst. The highest bio-oil yield (53.97%) was obtained using acetone with 10% zinc chloride at 300°C. The liquid products were extracted with benzene and di-Et ether. Some of selected liquid products (bio-oils) were analyzed by elemental, FT-IR and GC-MS. 126 different compounds were identified by GC-MS in the liquid products obtained in ethanol at 300°C. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Synthetic Route of 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. 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.Synthetic Route of C7H14O3

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