Category: 140-11-4

Guerrera, Gina published the artcileThe potential interference of body products and substrates to the identification of ignitable liquid residues on worn clothing, Formula: C9H10O2, the main research area is forensic analysis worn clothing ignitable liquid residue GC MS.

The question of whether deposits on clothing as well as their chem. composition are being mistaken for ignitable fluids is a concern for forensic analysts. Body products and oil secretions can have similar chem. profiles to ignitable liquid residues (ILRs) as a result of comparable chem. compounds that may be found in both sources. This study investigated whether substrates of unworn and worn clothing, with endogenous body secretions and body products could interfere with ILR anal. Sample extraction was completed by passive headspace concentration with activated charcoal strips (ACS) and desorption with carbon disulfide followed by anal. with gas chromatog.-mass spectrometry (GC-MS). Results showed that some body products produce similar patterns to heavy petroleum distillates and most clothing contained components that are commonly found in ignitable liquids It was concluded that the clothing, body products and compounds released by the body all contribute to the GC-MS profile of worn clothing. These components can mimic or mask the presence of ILRs, however educated and experienced analysts would likely be able to differentiate these substrate patterns from ILRs.

Forensic Chemistry published new progress about Activated charcoal Role: ARU (Analytical Role, Unclassified), ANST (Analytical Study). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Formula: C9H10O2.

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

Barman, Monica published the artcileTemporal relationship between emitted and endogenous floral scent volatiles in summer- and winter-blooming Jasminum species, Synthetic Route of 140-11-4, the main research area is Jasminum floral scent volatile summer winter blooming.

Jasminum spp. is cultivated for their fragrant flowers used in essential oil production and cosmetic uses. An attempt was made to study the temporal variations in floral scent volatiles composition including emitted, free endogenous and glycosyl-linked volatile compounds from two summer-blooming species namely, Jasminum auriculatum and Jasminum grandiflorum as well as from two winter-blooming species namely, Jasminum multiflorum and Jasminum malabaricum. The overall emitted volatile organic compounds (VOCs) were found to be highest when the matrix Porapak Q 80/100 was used with dichloromethane (DCM) as elution solvent. The floral volatile emission from bud to senescence exhibited nocturnal maxima pattern for both the summer-blooming species. Both the winter-blooming species emitted its highest concentration at noon. The free endogenous concentrations of all VOCs were low when corresponding emitted concentrations were high. Enzymic treatment of petal extract revealed that several aromatic volatiles including aromatic alcs. and monoterpenols are synthesized and stored in the flowers as water-soluble glycosides; these compounds were shown to accumulate in higher amounts in flowers at late bud stage. These findings indicate the utilization of the precursors, i.e. the volatile-conjugates, through hydrolysis followed by their release as free-volatiles at flower opening stage. The outcome as a whole suggests a linkage among the temporal pattern of emitted volatiles, free-endogenous volatiles and glycoside-bound volatile compounds in all above studied Jasminum spp. and provided an overview of their floral volatilome.

Physiologia Plantarum published new progress about Aromatic alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Synthetic Route of 140-11-4.

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

Mao, Xiaohui published the artcileCorrosion Behavior of Bitter Almond Oil During Processing, Recommanded Product: Benzyl acetate, the main research area is bitter almond oil processing corrosion behavior.

This study aims to explore the corrosion behavior of bitter almond oil (BAO) during processing. Hydrocyanic acid (HCN) and benzoic acid in oil are speculated as the main components that corrode the screw oil expeller. Immersion and simulation corrosion tests are carried out to verify this hypothesis. Immersion test results show that crude BAO (CBAO) containing 5.07 ± 0.06 mg kg-1 benzoic acid and 4.25 ± 0.04 mg kg-1 HCN exhibits corrosive effects on steel. Simulation corrosion test results indicate that the addition of CN- or benzoic acid has significant effect on the corrosion of steel. Specifically, at ≥1 × 104 mg kg-1 benzoic acid concentration or ≥5 mg kg-1 CN- concentration, the mass of steel blocks in oil decreases and the contents of Fe, Zn, Al, and Mg ions in oil increase significantly. Therefore, HCN in CBAO is the main cause of screw oil expeller corrosion in BAO processing and benzoic acid is the secondary cause. Practical Applications: The corrosion behavior of CBAO not only damages the integrity of the screw oil expeller but also increases the dissolution of toxic metals from the components into oil. The study of corrosion has practical value in taking effective measures, such as detoxification before pressing and addition of natural inhibitors, to reduce corrosion and ensure the quality of CBAO. Corrosion study provides the basis for the selection of steel materials of screw oil expeller.

European Journal of Lipid Science and Technology published new progress about Bitter almond oil Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Blackford, C. L. published the artcileExploring the influence of grape tissues on the concentration of wine volatile compounds, Name: Benzyl acetate, the main research area is volatile compound grape tissue skin seed wine flavor.

Knowledge of varietal wine flavor and aroma compounds has improved, but gaps exist concerning how grape composition impacts wine style. This work aimed to explore the influence that different grape tissues can have on the volatile profiles of wines. Riesling and Cabernet Sauvignon berries were separated into skin, flesh and seeds. Two sets of fermentations were performed using separated tissues: one using an equal mass of each tissue and another where the amount of each tissue in 25 g of berries was fermented. When an equal mass of tissue was used, the seed-derived wines had a higher concentration of esters than that produced from other grape tissues. Those produced using skins had the highest concentration of lipoxygenase pathway-derived compounds, and, for Riesling, a higher concentration of monoterpenes. When the proportional amounts of each tissue found per berry were used, the flesh-derived wines generally had a higher concentration of many wine volatiles compared to the other tissues. This reflects the greater proportion of flesh tissue in the berry compared to skin and seeds. Seed-derived compounds can enhance ester biosynthesis during fermentation and skins appear to have high lipoxygenase pathway activity. Nevertheless, the flesh makes up such a large proportion of the whole berry that it has the major influence on volatile profiles of whole berry fermentations Different berry tissues can alter wine composition in unique ways, and this can inform strategies to alter wine composition through vineyard management or the selection of new germplasm.

Australian Journal of Grape and Wine Research published new progress about Aromatic compounds Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Name: Benzyl acetate.

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

Li, Chao published the artcileQuantitative structure-activity relationship models for predicting reaction rate constants of organic contaminants with hydrated electrons and their mechanistic pathways, Product Details of C9H10O2, the main research area is organic contaminant hydrated electron pathway reaction rate constant QSAR; Hydrated electron (e(aq)(−)); QSAR models; Quantum chemical calculation; Second order rate constants; Single electron transfer.

The hydrated electron (e-aq)-based reduction processes are promising for removing organic pollutants in water engineering systems. The reductive kinetics, especially the second order rate constants (keaq-) of e-aq with organic compounds, is important for evaluating and modeling the advanced reduction processes. In this study, the keaq-values for aliphatic compounds and phenyl-based compounds are, for the first time, modeled by the quant. structure-activity relationship (QSAR) method. The structural features governing the reactivity of two classes of organic compounds toward e-aq were revealed, and the energy of the LUMO (ELUMO), one-electron reduction potential (ERED) and polarizability (a) were found to be the important mol. parameters in both two models. The built QSAR models provide robust predictive tools for estimating the removal of emerging pollutants using e-aq during wastewater treatment processes. Addnl., quantum chem. calculations were employed to probe into the mechanism and feasibility of the single electron transfer (SET) pathway in the e-aq-based reduction process. The thermodn. investigation suggests that the compounds with electron-withdrawing groups tend to possess higher keaq- and lower Gibbs free energy (ΔGSET) and Gibbs free energies of activation (Δ‡GoSET) than the ones with electron-donating groups, indicating the SET process occurs more readily. It is also found that the refractory halogenated compounds can achieve dehalogenation via the SET pathway.

Water Research published new progress about Benzenoid aromatic compounds Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Product Details of C9H10O2.

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

Gao, Meiping published the artcileSource profiles and emission factors of VOCs from solvent-based architectural coatings and their contributions to ozone and secondary organic aerosol formation in China, COA of Formula: C9H10O2, the main research area is ozone volatile organic compound solvent architectural coating emission; Emission factors and inventories; Ozone and secondary organic aerosol (SOA); Priority control analysis; Solvent-based architectural coating emissions; Source profiles; Volatile organic compounds (VOCs).

Volatile organic compounds (VOCs) from solvent-based architectural coatings (SBACs) play an important role in photochem. air pollution with increasing consumption of architectural coatings in China. In this study, we collected 148 typical SBACs of 3 types in China. The TVOC emission factors and source profiles were established, the contributions of SBACs to ozone and secondary organic aerosol (SOA) formation were investigated. The VOC emissions and O3 and SOA amounts formed in chem. reactions from SBACs in 2017 were estimated Key organic groups and VOC species with high reactivity were identified. According to the results, the TVOC emission factors were 507.17 g L-1 for solvent-based anticorrosive coatings, 381.34 g L-1 for solvent-based floor coatings and 459.68 g L-1 for solvent-based fire-retardant coatings. The VOC emissions were 186,902.11 t, 88,225.41 t and 71,352.32 t; the O3 amounts formed were 742,001.39 t, 397,896.60 t and 244,738.46 t; the SOA amounts formed were 3934.29 t, 2488.04 t and 1104.61 t, resp., from 3 types of SBACs in 2017. The O3 production factors were 1781.82 g O3 (kg paint)-1, 1457.50 g O3 (kg paint)-1 and 1176.63 g O3 (kg paint)-1, the SOA production factors were 9.45 g SOA (kg paint)-1, 9.11 g SOA (kg paint)-1 and 5.31 g SOA (kg paint)-1, for 3 types of SBACs. Priority should be given to organic group of aromatics and top 17 VOC species with high reactivity for O3 and SOA eliminating strategies, especially three xylenes (o-xylene, m-xylene and p-xylene), ethylbenzene, tri-Me benzenes (1,3,5-tri-Me benzene, 1,2,3-Tri-Me benzene) and toluene.

Chemosphere published new progress about Acids Role: ANT (Analyte), POL (Pollutant), ANST (Analytical Study), OCCU (Occurrence). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, COA of Formula: C9H10O2.

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

Isidorov, Valery A. published the artcileInheritance of specific secondary volatile metabolites in buds of white birch Betula pendula and Betula pubescens hybrids, HPLC of Formula: 140-11-4, the main research area is Betula bud secondary volatile metabolite ploidy flowering time.

Despite the differences in ploidy and in the timing of flowering, two species of white birch, Betula pendula and Betula pubescens often form viable hybrids in places of their joint growth. Recognition of such hybrids by their morphol. features is very difficult or impossible. On the other hand, it could be assumed that substantial differences can be found in the secondary metabolites whose composition is determined mainly by genetic factors. However, the inheritability of biosynthesis of secondary birch metabolites is unknown. We investigated the bud volatile organic compounds (VOCs) of the artificial hybrids of these birches and compared them with specific metabolites of pure parent species. The bud VOCs were determined by a combination of head-space microextraction with gas chromatog.-mass spectrometry. As the result, we found that: (a) hybrids clearly show dominant inheritance along the maternal line and (b) the buds of hybrid plants have characteristic features of VOCs composition, which allows for definitive conclusions about hybrid origins in some cases.

Trees (Heidelberg, Germany) published new progress about Aliphatic alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Zhou, Dandan published the artcileInfluence of cold plasma on quality attributes and aroma compounds in fresh-cut cantaloupe during low temperature storage, Application of Benzyl acetate, the main research area is cold plasma food quality volatile compound cantaloupe lipoxygenase pathway.

In this study, cold plasma (CP) was applied in fresh-cut cantaloupe to investigate the changes of quality attributes and flavors. Results showed that CP maintained the qualities by suppressing the decrease of color, ascorbic acid, soluble solid contents and firmness in fresh-cut cantaloupe stored at 4°C for 10 days. Besides, CP significantly inhibited the decrease of aldehyde at the early storage but promoted the conversion of aldehydes into downstream volatiles afterwards. Total alcs. increased firstly but decreased afterwards and CP inhibited the decrease of alcs. at 4 d and 6 d mainly due to (Z)-3-none-1-ol accumulation. For the floral- and fruity-note aromas, most of esters, ketones and lactones increased at first and then decreased afterwards, and CP inhibited decrease of these three aromas. Furthermore, CP induced the activities of lipoxygenase, hydroperoxide lyase and alc. O-acyltransferase, indicating that CP promoted the conversion of aldehydes and alcs. into esters by enhancing the activities of these three key enzymes.

LWT–Food Science and Technology published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Gao, Chang published the artcileThe process monitors of probiotic fermented sour cherry juice based on the HS-GC-IMS, SDS of cas: 140-11-4, the main research area is Lactobacillus probiotic fermented sour cherry juice heptanal ethyl acetate.

In this study, the sour cherry juice was fermented by lactic acid bacteria (L. rhamnosus GG) and the volatile compounds were identified by both GC-IMS (gas chromatog.-ion mobility spectrometry) and GC-MS (gas chromatogram-mass spectrum). Total 10 aldehydes,10 ketones, 10 esters, 8 alcs., 8 acids, and another 6 compounds were identified in the fermented cherry juice. In addition, PCA (principal component anal.) was applied to differentiate various fermented cherry juice. The first two principal components can explain 80% of the total variables, with PC2 67% and PC1 13% resp. Meanwhile, the variation of lactic acid bacteria number was measured during fermentation The peak intensity variation of the 4 compounds was significantly correlated with changes of lactic acid bacteria number (P < 0.05), with the highest correlation coefficient of 0.97. The acetoin can be an indicator for monitoring number variation of lactic acid bacteria (L. rhamnosus GG) in fermented cherry juice and this study can provide a novel method of monitoring probiotic fruit juice fermentation Microchemical Journal published new progress about Aldehydes Role: BUU (Biological Use, Unclassified), BIOL (Biological Study), USES (Uses). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, SDS of cas: 140-11-4.

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

Liu, Xu published the artcileRing-contraction of hantzsch esters and their derivatives to pyrroles via electrochemical extrusion of ethyl acetate out of aromatic rings, Application In Synthesis of 140-11-4, the main research area is Hantzsch ester electrochem ring contraction; pyrrolyl ester preparation.

Electrochem. ring-contraction of HEs and theirs pyridine derivatives was developed to obtain polysubstituted pyrroles. This process provided an orthogonal utilization of Hantzsch esters for the well-documented application as side chain or hydrogen donors. The formal transformation showed an extrusion of Et acetate out of the pyridine ring in a single step. In addition to the novel transformation, this study also discovered the Lewis acid’s intermol. control of regioselectivity during an intramol. electrochem. process. The reaction provided a number of polysubstituted pyrroles that have never been accessed, including pharmaceutical intermediates and photoswitches. An unusual 4-electron continuous reduction drives the unprecedented anionic dearomatization/ring-contraction/rearomatization pathway.

Green Chemistry published new progress about Esters Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (Hantzsch). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Application In Synthesis of 140-11-4.

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