Category: 140-11-4

Zhu, Biying published the artcileAroma profile of Jinmudan tea produced using Camellia sinensis, cultivar Jinmudan using solid-phase microextraction, gas chromatography-mass spectrometry, and chemometrics, Computed Properties of 140-11-4, the main research area is Jinmudan tea Camellia aroma solid phase microextraction gas chromatog.

Jinmudan (JM) tea, produced using Camellia sinensis, cultivar JM, is popular among consumers because of its strong floral and fruity aroma. Aroma profiles of white, green, black, and oolong teas, which were obtained from JM and Tanyangcaicha (TY, control and indigenous variety), were investigated. Sensory evaluation was used to describe the quality characteristics of the tea samples. A combination of headspace solid-phase microextraction, gas chromatog.-mass spectrometry (HS-SPME/GC-MS), and chemometrics was used to extract and analyze the volatiles in the samples; 162 volatiles were identified and categorized on the basis of their chem. structures. The proportions of chem. categories differed among the teas. The same type of tea obtained from JM and TY differed significantly in concentrations and categories of volatiles. This study will improve our understanding of the profile of volatile compounds in JM teas and create a basis for investigating the biol. characteristics of JM teas.

European Food Research and Technology published new progress about Camellia sinensis. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Computed Properties of 140-11-4.

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

Dai, Qianying published the artcileInvestigating volatile compounds’ contributions to the stale odour of green tea, HPLC of Formula: 140-11-4, the main research area is Camellia volatile compound stale odor.

Summary : This study aimed to characterize the volatiles that contribute to stale odor of green tea. Volatiles were extracted using headspace solid-phase microextraction (HS-SPME) and analyzed using gas chromatog.-mass spectrometry (GC-MS) and gas chromatog.-olfactometry (GC-O). Results showed that a total of ninety-six volatiles were identified by GC-MS, in which forty-four volatiles were screened out based on Principal component anal. (PCA) and orthogonal projections to latent structures-discriminant anal. (OPLS-DA), and thirty-nine volatiles had a significant variation at the level of 0.05 by anal. of variance (ANOVA). From GC-O anal., fifty-four aromatic volatiles with strong aroma intensity (aroma intensity above 2) were perceived. Further investigation revealed that fifteen volatiles, including 1-octen-3-ol, benzyl alc., benzaldehyde, safranal, β-cyclocitral, (E,E)-3,5-octadien-2-one, (Z,E)-3,5-octadien-2-one, di-Me adipate, dihydroactinidiolide, β-ionone, α-ionone, geranyl acetone, phenylethyl alc., Me decanoate and α-terpineol were responsible for stale odor, besides the former nine compounds were only found in stored tea.

International Journal of Food Science and Technology published new progress about Camellia sinensis. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, HPLC of Formula: 140-11-4.

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

Albalat, Muriel published the artcileAn enzymatic acetal/hemiacetal conversion for the physiological temperature activation of the alkoxyamine C-ON bond homolysis, Application of Benzyl acetate, the main research area is alkoxylamine bond cleavage enzymic acetal hemiacetal conversion.

The potential of alkoxyamines as theranostic agents has been recently promoted by authors groups. The success of such an approach relies on the switch upon enzymic triggering between highly stable precursor alkoxyamines and activated alkoxyamines exhibiting fast homolysis of the C-ON bond. Hence, at 37° in water, benzyl 2-(2,2,6,6-tetramethylpiperidin-N-oxy)-3-ethoxy-3-acetoxypropanoate and benzyl 2-ditert-butylaminoxy-3-ethoxy-3-acetoxy propanoate afford tmax of 2000 s (35% conversion) and 500 s (60% conversion), resp., for the C-ON bond homolysis in the presence of Subtilisin A whereas t1/2 of ca. 42 thousand millenniums and 330 years are expected accordingly to Ea values in n-propanol. These results nicely highlight the on/off switch, provided that an enzymic activity controls the C-ON bond homolysis.

Organic Chemistry Frontiers published new progress about Activation energy. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Application of Benzyl acetate.

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

Omaiye, Esther E. published the artcileElectronic Cigarette Refill Fluids Sold Worldwide: Flavor Chemical Composition, Toxicity, and Hazard Analysis, Quality Control of 140-11-4, the main research area is electronic cigarette fluid flavor toxicity hazard.

Flavor chems. in electronic cigarette (EC) fluids, which may neg. impact human health, have been studied in a limited number of countries/locations. To gain an understanding of how the composition and concentrations of flavor chems. in ECs are influenced by product sale location, we evaluated refill fluids manufactured by one company (Ritchy LTD) and purchased worldwide. Flavor chems. were identified and quantified using gas chromatog./mass spectrometry (GC/MS). We then screened the fluids for their effects on cytotoxicity (MTT assay) and proliferation (live-cell imaging) and tested authentic standards of specific flavor chems. to identify those that were cytotoxic at concentrations found in refill fluids. A total of 126 flavor chems. were detected in 103 bottles of refill fluid, and their number per/bottle ranged from 1-50 based on our target list. Two products had none of the flavor chems. on our target list, nor did they have any nontargeted flavor chems. A total of 28 flavor chems. were present at concentrations � mg/mL in at least one product, and 6 of these were present at concentrations �0 mg/mL. The total flavor chem. concentration was � mg/mL in 70% of the refill fluids and �0 mg/mL in 26%. For sub-brand duplicate bottles purchased in different countries, flavor chem. concentrations were similar and induced similar responses in the in vitro assays (cytotoxicity and cell growth inhibition). The levels of furaneol, benzyl alc., ethyl maltol, Et vanillin, corylone, and vanillin were significantly correlated with cytotoxicity. The margin of exposure calculations showed that pulegone and estragole levels were high enough in some products to present a nontrivial calculated risk for cancer. Flavor chem. concentrations in refill fluids often exceeded concentrations permitted in other consumer products. These data support the regulation of flavor chems. in EC products to reduce their potential for producing both cancer and noncancer toxicol. effects.

Chemical Research in Toxicology published new progress about Cell proliferation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Quality Control of 140-11-4.

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

Goel, Reema published the artcileA Computational Approach for Respiratory Hazard Identification of Flavor Chemicals in Tobacco Products, Recommanded Product: Benzyl acetate, the main research area is chemoinformatic respiratory health hazard flavor material tobacco product.

Flavor chems. contribute to the appeal and toxicity of tobacco products, including electronic nicotine delivery systems (ENDS). The assortment of flavor chems. available for use in tobacco products is extensive. In this study, a chem.-driven computational approach was used to evaluate flavor chems. based on intrinsic hazardous structures and reactivity of chems. A large library of 3012 unique flavor chems. was compiled from publicly available information. Next, information was computed and collated based on their (1) physicochem. properties, (2) Global Harmonization System (GHS) health hazard classification, (3) structural alerts linked to the chem.’s reactivity, instability, and/or toxicity, and (4) common substructure shared with FDA’s harmful and potentially harmful constituents (HPHCs) flavor chems. that are respiratory toxicants. Computational anal. of the constructed flavor library flagged 638 chems. with GHS classified respiratory health hazards, 1079 chems. with at least one structural alert, and 2297 chems. with substructural similarity to FDA’s established and proposed list of HPHCs. A subsequent anal. was performed on a subset of 173 chems. in the flavor library that are respiratory health hazards, contain structural alerts as well as flavor HPHC substructures. Four general toxicophore structures with an increased potential for respiratory toxicity were then identified. In summary, computational methods are efficient tools for hazard identification and understanding structure-toxicity relationship. With appropriate context of use and interpretation, in silico methods may provide scientific evidence to support toxicol. evaluations of chems. in or emitted from tobacco products.

Chemical Research in Toxicology published new progress about Chemical stability. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Recommanded Product: Benzyl acetate.

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

Piesik, Dariusz published the artcileEffect of Lugus sp. feeding and a saponin application on volatiles released by quinoa, Safety of Benzyl acetate, the main research area is Chenopodium Lygus saponin volatile compound.

In consequence of insect feeding and saponin application tested quinoa plants released large amounts of volatile organic compounds (VOCs) to compare to control. For cv. ‘Faro’ these were the following components: (Z)-3-hexenal – (Z)-3-HAL, (E)-2-hexenal – (E)-2-HAL, (Z)-3-hexen-1 -ol – (Z)-3-HOL, (E)-2-hexen-1 -ol – (E)-2-HOL, (Z)-3-hexen-1 -yl acetate – (Z)-3-HAC, 1 -hexyl acetate – 1 -HAC, (Z)-ocimene – (Z)-OCI, benzyl acetate – BAC, Me salicylate – MAT, β- caryophyllene – β-CAR, (E)-β-farnesene – (E)-β-FAR. Cv. ‘Puno’ released 7 VOCs and these were: (Z)-3-HAL, (Z)-3- HOL, (Z)-3-HAC, (Z)-OCI, MAT, β-CAR, and (E)- β-FAR. The fragrance bouquet of the third of variety tested (cv. ‘Titicaca’) consisted of 6 components: (Z)-3-HAL, (E)-2-HAL, (E)-2-HOL, (Z)-3-HAC, (Z)-OCI, and β-CAR. In general, much larger VOCs emission was observed in plants after insect feeding compared to saponin applications and especially control.

Pakistan Journal of Botany published new progress about Chenopodium quinoa. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Safety of Benzyl acetate.

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

Duan, Bobo published the artcileAccess to α,α-dithioketones through direct di-sulfenylation of methyl ketones mediated by KOH-DMSO system, Recommanded Product: Benzyl acetate, the main research area is ketone alkylthio arylthio preparation; methyl ketone sulfenylation selenylation disulfide diselenide superbase system.

A direct di-sulfenylation of Me ketones R1C(O)Me (R1 = Me, i-Pr, cyclopropyl, Ph, 2-thienyl, 2-pyridyl, etc.) with disulfides R2SSR2 [R2 = Me, Ph, 4-MeC6H4, Et2NC(S), 2-pyridyl, etc.] mediated by KOH-DMSO superbase system has been developed. This method provides an efficient route to α,α-dithioketones R1C(O)CH(SR2)2 and has the advantages of readily available non-prefunctionalized substrates, good functional group tolerance, excellent yields as well as high selectivity. In a single operation, two C-S bonds are simultaneously built on the same carbon atom under mild reaction conditions. The procedure was extended to the reaction of acetophenone with di-Ph diselenide which afforded the keto bis(selenide) PhC(O)CH(SePh)2 in 81% yield.

Tetrahedron Letters published new progress about C-S bond formation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Recommanded Product: Benzyl acetate.

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

Nedele, Ann-Kathrin published the artcileCharacterization of cheesy odor formed during fermentation of soy drink with Agrocybe aegerita, Computed Properties of 140-11-4, the main research area is cheesy odor fermentation soy drink Agrocybe; Agrocybe aegerita; Cheesy flavor; Fermentation; Short-chain fatty acids; Soy drink.

The market for plant protein-based substitutes for cheeses is growing, but the sensory properties are distinctively different from the original products. Hence, natural and vegan cheesy flavors are needed to aromatize the products. A cheesy, sweaty and parmesan-like aroma was produced by fermentation of soy drink with Agrocybe aegerita. Aroma dilution anal. revealed short-chain fatty acids (SCFAs) as main influencing cheesy odorants analyzed by gas chromatog.-mass spectrometry-olfactometry. In comparison to the five cheese varieties, the SCFA profile of the fermented soy drink revealed similarities with Parmesan and Emmental cheese. Meanwhile, principal component anal. showed an approximation of the aroma profile after fermentation with A. aegerita to those of cheeses. 3-Methylbutanoic acid was synthesized from the protein fraction, while the oil fraction contributed to the formation of unbranched SCFAs like butanoic acid. Accordingly, the production of these compounds can be increased by addition of the fractions.

Food Chemistry published new progress about Cyclocybe aegerita. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Computed Properties of 140-11-4.

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

Kfoury, Miriana published the artcileContribution of headspace to the analysis of cyclodextrin inclusion complexes, Category: esters-buliding-blocks, the main research area is cyclodextrin inclusion complex headspace.

Headspace technol. is a sampling method of a gas, which has been previously in contact with a liquid or a solid matrix from which volatiles were released into the gaseous phase. It is generally coupled to a subsequent gas chromatog. anal. The headspace anal. can be carried out either as a one-step extraction (static or equilibrium headspace) or as a continuous extraction (dynamic headspace). The static headspace gas chromatog. (SH-GC) is gaining an increasing interest for the study of cyclodextrin (CD) inclusion complexes with volatile compounds CDs are natural supermol. hosts able to encapsulate volatile compounds and improve their functionalities (e.g. solubility, stability, retention, controlled release). Herein, the application of the SH-GC in the CD field will be reviewed. This paper will focus on the characterization of the inclusion complexes via the SH-GC, mainly aiming at the determination of formation constant (Kf) and encapsulation efficiency (EE%) values. Moreover, it will review the application of the SH-GC to monitor the properties of volatile compounds upon encapsulation (e.g. retention, controlled release).

Journal of Inclusion Phenomena and Macrocyclic Chemistry published new progress about Formation constant. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Category: esters-buliding-blocks.

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

Ng, Felicia published the artcileCharacterization of volatile compounds in Ylang-Ylang essential oils from Comoros and Madagascar by gas chromatography and principal component analysis, Quality Control of 140-11-4, the main research area is Ylang essential oil gas chromatog volatile compound.

Chem. composition of ylang-ylang essential oil is affected by the geog. origins of flowers used for extraction This study aimed to determine the compositional difference between the extra, first and third grades of ylang-ylang essential oil from Comoro Islands and Madagascar. The oils were characterized by both gas chromatog.-mass spectrometry (GC-MS) and gas chromatog.-flame ionization detector (GC-FID) in conjunction with principal component anal. (PCA). A total of 124 volatile compounds were identified and quantified by GC-MS and GC-FID. Twenty-two compounds that made up 85% to 90% of the oils were shortlisted to compare across grades and geog. origins. The PCA showed that the ylang-ylang essential oils are clustered according to grade and origin based on their compositions Anal. of variance was performed to determine the statistical significance of the differences between each compound across extra, first and third grades of ylang-ylang essential oil from Madagascar and Comoros. The oils of Madagascar are dominating in geranyl acetate, cis-α-farnesene, benzyl benzoate, humulene and caryophyllene, while in those of Comoros, cinnamyl acetate, benzyl salicylate, trans-farnesyl acetate and α-farnesene are found to be higher. It is possible to verify the origin and grade of an unspecified source of ylang-ylang essential oil from the biplot of the 22 compounds

Flavour and Fragrance Journal published new progress about Gas chromatography. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Quality Control of 140-11-4.

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