Category: 140-11-4

Wang, Jiatong published the artcileDiscrimination and identification of aroma profiles and characterized odorants in citrus blend black tea with different citrus species, HPLC of Formula: 140-11-4, the main research area is citrus blend black tea odorant aroma discrimination; GC-O/MS; GC×GC-TOFMS; aroma profiles; characterized odorants; citrus blend black tea; discrimination.

Citrus blend black teas are popular worldwide, due to its unique flavor and remarkable health benefits. However, the aroma characteristics, aroma profiles and key odorants of it remain to be distinguished and cognized. In this study, the aroma profiles of 12 representative samples with three different cultivars including citrus (Citrus reticulata), bergamot (Citrus bergamia), and lemon (Citrus limon) were determined by a novel approach combined head space-solid phase microextraction (HS-SPME) with comprehensive two-dimensional gas chromatog.-time-of-flight mass spectrometry (GC x GC-TOFMS). A total of 348 volatile compounds, among which comprised esters (60), alkenes (55), aldehydes (45), ketones (45), alcs. (37), aromatic hydrocarbons (20), and some others were ultimately identified. The further partial least squares discrimination anal. (PLS-DA) certified obvious differences existed among the three groups with a screening result of 30 significant differential key volatile compounds A total of 61 aroma-active compounds that mostly presented green, fresh, fruity, and sweet odors were determined in three groups with gas chromatog.-olfactometry/mass spectrometry (GC-O/MS) assisted anal. Heptanal, limonene, linalool, and trans-β-ionone were considered the fundamental odorants associated with the flavors of these teas. Comprehensive anal. showed that limonene, Et octanoate, copaene, Et butyrate (citrus), benzyl acetate, nerol (bergamot) and furfural (lemon) were determined as the characterized odorants for each type.

Molecules published new progress about Aldehydes Role: ANT (Analyte), FFD (Food or Feed Use), ANST (Analytical Study), BIOL (Biological Study), USES (Uses). 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

Ceccoli, Romina D. published the artcileGenome mining reveals new bacterial type I Baeyer-Villiger monooxygenases with (bio)synthetic potential, Application In Synthesis of 140-11-4, the main research area is genome mining type I Baeyer Villiger monooxygenase Bradyrhizobium; ketone oxidation lactone production Baeyer Villiger monooxygenase Bradyrhizobium.

Baeyer-Villiger monooxygenases (BVMOs) are oxidoreductases that catalyze the oxidation of ketones in a very selective manner. By genome mining we detected seven putative type I BVMOs in Bradyrhizobium diazoefficiens USDA 110. As we established the phylogenetic relationships among them and with other type I BVMOs, we found out that they belong to different clades of the phylogenetic tree. Thus, we decided to clone and heterologously express five of them. Three of them, each one from a divergent phylogenetic group, were obtained as soluble proteins, allowing us to proceed with their biocatalytic assessment and enzymic characterization. As to substrate scope and selectivity, we observed a complementary behavior among the three BVMOs. BVMO2 was the more versatile biocatalyst in whole-cell systems while BVMO4 and BVMO5 showed a narrow substrate profile with preference for linear ketones and particular regioselectivity for (±)-cis-bicyclo[3.2.0]hept-2-en-6-one.

Molecular Catalysis published new progress about Baeyer-Villiger oxidation. 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

Rubial, Belen published the artcileSilylium-Catalyzed Alkynylation and Etherification Reactions of Benzylic Acetates, Recommanded Product: Benzyl acetate, the main research area is propargyl arene benzyl alkyl ether preparation; benzyl acetate trimethylalkynylsilane alkynation bistriflimide catalyst; trimethylalkoxysilane benzyl acetate etherification bistriflimide catalyst.

Addition of catalytic amounts of bistriflimide triggers useful coupling reactions of acetates e.g., 1-phenylethyl acetate with trimethyl(alkynyl)silanes e.g., (phenylacetylenyl)trimethylsilane and trimethyl(alkoxy)silanes e.g., trimethyl(2-phenylethoxy)silane to afford propargyl arenes e.g., 1,3-diphenylbut-1-yne and benzyl alkyl ethers e.g., [1-(2-phenylethoxy)ethyl]benzene resp. The added acid assists the release of reactive trimethylsilylium ion into the reaction media, which were found to act as the ultimate catalytic species responsible for the C-C and the C-O forming steps. The cationic nature of these coupling processes is documented.

European Journal of Organic Chemistry published new progress about Alkoxysilanes Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Zhong, Zhuoheng published the artcileIntegrative omic analysis reveals the improvement of alkaloid accumulation by ultraviolet-B radiation and its upstream regulation in Catharanthus roseus, Product Details of C9H10O2, the main research area is Catharanthus leaf ATP synthase geranylgeranyl diphosphate reductase gene ontol.

Indole alkaloids from Catharanthus roseus (L.) G. Don were valued for their wide spectrum of pharmaceutical effects. Their biosynthesis is modulated by various abiotic factors including UV B radiation which induced ATP production and led to accumulation of indole alkaloids. To investigate the regulatory mechanism of secondary metabolism in the leaf mitochondria of C. roseus under UV B radiation, combinatory study of proteomic and metabolomic analyses of C. roseus was performed. ATP export in the leaves of C. roseus increased under UVB radiation, which required mitochondrial ATP synthase. Proteins related to mitochondrial complexes II/IV and their gene expression levels increased, and those related to mitochondrial complex I decreased. Proteins related to the methylerythritol phosphate pathway, especially geranylgeranyl pyrophosphate synthase, increased under UV B radiation. Metabolites whose levels changed were mainly alkaloids, organic acids, carbohydrates, phenylpropanoids, and fatty acids, while eight indole alkaloids increased. Integrative anal. of omics data indicated that the metabolism of glutamate and tyrosine was downregulated. These results suggest that UV B radiation induces dynamic changes in mitochondria in C. roseus, which guarantees ATP production, regulates the flux of the methylerythritol phosphate pathway to the biosynthesis of monoterpene moieties, and leads to accumulation of various indole alkaloids.

Industrial Crops and Products published new progress about Carbohydrates 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

Lee, Minhan published the artcileModular Tuning of Electrophilic Reactivity of Iridium Nitrenoids for the Intermolecular Selective α-Amidation of β-Keto Esters, Category: esters-buliding-blocks, the main research area is dicarbonyl compound trichloroethoxycarbonyl azide iridium catalyst chemoselective amidation; amido dicarbonyl compound preparation.

Ir-catalyzed intermol. amino group transfer to β-keto esters (amides) to α-aminocarbonyl products with excellent chemoselectivity was reported. The key strategy was engineered electrophilicity of the putative Ir-nitrenoids by tuning electronic property of the κ2-N,O chelating ligands, thus facilitated nucleophilic addition of enol π-bonds of 1,3-dicarbonyl substrates.

Journal of the American Chemical Society published new progress about Amidation (chemoselective). 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

Ghanadzadeh Gilani, A. published the artcileMeasurement and Modeling of Liquid-Liquid Equilibria for Water-Phosphoric Acid-Aromatic Esters, Recommanded Product: Benzyl acetate, the main research area is liquid liquid equilibrium water phosphoric acid aromatic ester.

Ternary liquid-liquid equilibrium (LLE) data were measured for the {water + phosphoric acid + aromatic esters (benzyl acetate, benzyl benzoate, di-Me phthalate, and di-Et phthalate)} systems at T = 298.2 K and P = 101.3 kPa. Moreover, to investigate the effect of temperature on LLE behavior, the LLE measurement was performed for a ternary system of (water + phosphoric acid + benzyl acetate) at three different temperatures (298.2, 308.2, and 318.2) K and the above pressure as well. Among the studied ternary systems, only the phase diagram for the system containing benzyl acetate clearly displays type-1 LLE behavior. The quality of the tie-line data was checked through the Othmer-Tobias correlation equation. The exptl. data were correlated using the UNIQUAC model. For all of the systems studied, the separation factors are larger than unity, which means that the chosen aromatic esters might have the potential to extract phosphoric acid from water. As the solubility of the acid in benzyl benzoate is poor and it might be hydrolyzed in water after having been rested for a while, it is not a suitable solvent in the recovery of the acid from water.

Journal of Chemical & Engineering Data published new progress about Liquid-liquid equilibrium (ternary). 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

Filannino, Pasquale published the artcileVolatilome and bioaccessible phenolics profiles in lab-scale fermented bee pollen, Application In Synthesis of 140-11-4, the main research area is fermented bee pollen volatilome bioaccessible phenolics; fermentation; flavonoids; lactic acid bacteria; phenolics; pollen; volatile compounds.

Bee-collected pollen (BCP) is currently receiving increasing attention as a dietary supplement for humans. In order to increase the accessibility of nutrients for intestinal absorption, several biotechnol. solutions have been proposed for BCP processing, with fermentation as one of the most attractive. The present study used an integrated metabolomic approach to investigate how the use of starter cultures may affect the volatilome and the profile of bioaccessible phenolics of fermented BCP. BCP fermented with selected microbial starters (Started-BCP) was compared to spontaneously fermented BCP (Unstarted-BCP) and to unprocessed raw BCP (Raw-BCP). Fermentation significantly increased the amount of volatile compounds (VOC) in both Unstarted- and Started-BCP, as well as modifying the relative proportions among the chem. groups. Volatile free fatty acids were the predominant VOC in Unstarted-BCP. Started-BCP was differentiated by the highest levels of esters and alcs., although volatile free fatty acids were always prevailing. The profile of the VOC was dependent on the type of fermentation, which was attributable to the selected Apilactobacillus kunkeei and Hanseniaspora uvarum strains used as starters, or to the variety of yeasts and bacteria naturally associated to the BCP. Started-BCP and, to a lesser extent, Unstarted-BCP resulted in increased bioaccessible phenolics, which included microbial derivatives of phenolic acids metabolism

Foods published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), PUR (Purification or Recovery), BIOL (Biological Study), PREP (Preparation). 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

Khacef, Leila published the artcileEffect of Solvent on the Mechanical and Structural Properties of N-Alkyldiamide Organogels, COA of Formula: C9H10O2, the main research area is effect solvent mech structural property alkyldiamide organogel.

Here, we study organogels prepared thanks to a new organogelator, the N-oleyldiamide mol., which shows a remarkable propensity to gelify a large scope of solvents, from aprotic to high protic solvents. The solvent plays a key role in the formation and stability of supramol. self-assemblies. However, the understanding and the control of its effects can be complex as many parameters are a priori involved. This study aims to understand the effect of solvent on the structures of organogels and on their final mech. properties. Five solvent classes have been selected ranking from low protic to high protic, according to the Hansen H-bond parameter δh. The solvent proticity appears to be one of the main parameters that affect the organogel internal structure and therefore the final rheol. properties. For a given organogelator fraction, the terminal elastic modulus measured by oscillatory rheol. is observed to increase significantly with the Hansen H-bond solvent parameter δh. Materials of different mech. properties are then shown to display various structures, which are investigated thanks to cryo-SEM. Besides, wide-angle X-ray scattering (WAXS) has been used to probe the gelator organization at the mol. scale with regard to the solvent nature, to understand the supramol. self-assembly of this promising mol.

Langmuir published new progress about Alkanes Role: NUU (Other Use, Unclassified), PEP (Physical, Engineering or Chemical Process), PRP (Properties), USES (Uses), PROC (Process). 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

Helberg, Julian published the artcilePyridinyl Amide Ion Pairs as Lewis Base Organocatalysts, Product Details of C9H10O2, the main research area is Lewis base organocatalyst pyridinyl amide ion pair; aza Morita Baylis Hillman reaction hindered electrophile isocyanate alc.

Pyridinyl amide ion pairs carrying various electron-withdrawing substituents were synthesized with selected ammonium or phosphonium counterions. Compared to neutral pyridine-based organocatalysts, these new ion pair Lewis bases display superior catalytic reactivity in the reaction of isocyanates with alcs. and the aza-Morita-Baylis-Hillman reaction of hindered electrophiles. The high catalytic activity of ion pair catalysts appears to be due to their high Lewis basicities toward neutral electrophiles as quantified through quantum chem. calculated affinity data.

Journal of Organic Chemistry published new progress about Basicity, Lewis. 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

Wang, Xueqin published the artcileHeadspace Volatiles and Endogenous Extracts of Prunus mume Cultivars with Different Aroma Types, Name: Benzyl acetate, the main research area is Prunus mume endogenous extract aroma gas chromatog mass spectrometry; GC-MS; HS-SPME; OSE; Prunus mume; aroma types; endogenous extracts; headspace volatiles.

Prunus mume is a traditional ornamental plant, which owed a unique floral scent. However, the diversity of the floral scent in P. mume cultivars with different aroma types was not identified. In this study, the floral scent of eight P. mume cultivars was studied using headspace solid-phase microextraction (HS-SPME) and organic solvent extraction (OSE), combined with gas chromatog.-mass spectrometry (GC-MS). In total, 66 headspace volatiles and 74 endogenous extracts were putatively identified, of which phenylpropanoids/benzenoids were the main volatile organic compounds categories. As a result of GC-MS anal., benzyl acetate (1.55-61.26%), eugenol (0.87-6.03%), benzaldehyde (5.34-46.46%), benzyl alc. (5.13-57.13%), chavicol (0-5.46%), and cinnamyl alc. (0-6.49%) were considered to be the main components in most varieties. However, the volatilization rate of these main components was different. Based on the variable importance in projection (VIP) values in the orthogonal partial least-squares discriminate anal. (OPLS-DA), differential components of four aroma types were identified as biomarkers, and 10 volatile and 12 endogenous biomarkers were screened out, resp. The odor activity value (OAV) revealed that several biomarkers, including (Z)-2-hexen-1-ol, pentyl acetate, (E)-cinnamaldehyde, Me salicylate, cinnamyl alc., and benzoyl cyanide, contributed greatly to the strong-scented, fresh-scented, sweet-scented, and light-scented types of P. mume cultivars. This study provided a theor. basis for the floral scent evaluation and breeding of P. mume cultivars.

Molecules published new progress about Biomarkers. 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