Tag: M.W=150-200

Karabagias, Ioannis K. published the artcileVolatile fraction of commercial thyme honeys produced in Mediterranean regions and key volatile compounds for geographical discrimination: A chemometric approach, Application In Synthesis of 21834-92-4, the main research area is Thymus volatile fraction thyme honey chemometrics.

The aim of the present study was to investigate the volatile fraction and discriminate 34 com. thyme honeys from Morocco, Egypt, Spain, and Greece according to geog. origin, using key volatile compounds in combination with chemometrics. Sixty-two volatile compounds belonging to different classes were identified and semi-quantified using headspace solid phase micro-extraction coupled to gas chromatog./mass spectrometry (HS-SPME-GC/MS). Applying chemometric analyses to 17 volatiles (p < 0.05), honeys were successfully discriminated according to geog. origin. Correct classification rate was 88.2% using the cross-validation method. Volatile compounds proved to be a powerful tool for discriminating com. thyme honeys from different countries. International Journal of Food Properties published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Application In Synthesis of 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Kaal, Joeri published the artcileOrigin of dissolved organic matter in the Harz Mountains (Germany): A thermally assisted hydrolysis and methylation (THM-GC-MS) study, Related Products of isoquinoline, the main research area is dissolved organic matter thermally assisted hydrolysis and methylation Germany.

Environmental change is increasing the concentration of dissolved organic matter (DOM) in catchments of the Northern Hemisphere. This study aims to assess the causes of high DOM concentrations in streams and reservoirs of the Harz National Park (Germany), by means of mol. characterization using thermally assisted hydrolysis and methylation (THM-GC-MS). In order to formulate proxies of the prevailing origin of the numerous THM products of polyphenols, carbohydrates, proteins, aliphatic macromols., resins and other DOM precursors, we created a reference sample set of potential sources (spruce, birch, blueberry, heather, peat moss, soils) from the area. THM compounds that tend to be more abundant in WEOM than in BOM are G-type phenolic compounds (1,2-dimethoxybenzenes, from lignin and tannin), nitrogen-containing moieties and benzene carboxylic acids, whereas WEOM is depleted in products of polysaccharides, syringyl lignin and aliphatic macromols. (cutin and suberin). The lignin fingerprint of the WEOM also differs significantly from that of BOM, being depleted in the vast majority of the typical products of macromol. lignin (G7, G8, G14, G15) and enriched in the acid moiety (G6, predominantly from vanillic acid), especially for spruce wood. This may indicate a major role of DOM released from decaying spruce logs and forest soils. The results highlight both the potential and the pitfalls associated with source identification of DOM using THM-GC-MS.

Geoderma published new progress about Anisoles Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Kwamen, A. Carel N. published the artcileSolvent Dependence of the Monomer-Dimer Equilibrium of Ketone-Substituted Triscatecholate Titanium(IV) Complexes, Product Details of C9H10O3, the main research area is titanium triscatecholate preparation monomer dimer equilibrium solvent effect; helicates; intermolecular interactions; self assembly; solvent effect; thermodynamics.

Hierarchical helicates based on ketone-substituted titanium(IV)triscatecholates show different monomer-dimer behavior depending on different solvents. The dimerization constants of a whole series of differently alkyl-substituted complexes is analyzed to show that the solvent has a very strong influence on the dimerization. Hereby, effects like solvophobicity/philicity, sterics, electronics of the substituents and weak side-chain-side-chain interactions seem to act in concert.

Chemistry – A European Journal published new progress about Coordination compounds Role: SPN (Synthetic Preparation), PREP (Preparation). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Product Details of C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Fan, Wenlai published the artcileIdentification of aroma compounds in Chinese “”Moutai”” and “”Langjiu”” liquors by normal phase liquid chromatography fractionation followed by gas chromatography/olfactometry, Application of 5-Methyl-2-phenylhex-2-enal, the main research area is aroma compound Chinese liquor chromatog olfactometry.

The aroma-active compounds in two famous Chinese soy sauce aroma type liquors, Moutai and Langjiu liquors, were investigated. The aroma compounds were isolated using liquid/liquid extraction, and further fractionated into acidic, basic, and neutral fractions by silica gel normal phase chromatog. Using GC/Olfactometry (GC/O) and GC/MS, 186 aroma-active compounds were identified in the two liquors. Among these compounds, Et hexanoate, hexanoic acid, 3-methylbutanoic acid, 3-methylbutanol, 2,3,5,6-tetramethylpyrazine, Et 2-phenylacetate, 2-phenylethyl acetate, Et 3-phenylpropanoate, 4-methylguaiacol, and γ-decalactone had the highest aroma intensity. Several other basic compounds, including 2,3-dimethyl-5-ethylpyrazine, 2,3,5-trimethyl-6-ethylpyrazine, 2,3,5-trimethylpyrazine, were identified to have high aroma intensity. In addition, vanillin, γ-heptalactone, γ-nonalactone, Z-whisky lactone, furaneol, and sotolon, were identified in the liquors. Geosmin was also detected in these two liquors.

ACS Symposium Series published new progress about Acetals Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Application of 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bojke, Alekandra published the artcileApplication of HS-SPME-GC-MS for the analysis of aldehydes produced by different insect species and their antifungal activity, Computed Properties of 21834-92-4, the main research area is entomopathogenic fungi aldehyde antifungal HS SPME GC MS; Aldehydes; Antifungal activity; Entomopathogenic fungi; HS-SPME-GC-MS; MIC.

In this study, a procedure was developed to determine aldehydes using headspace solid-phase microextraction (HS-SPME) followed by gas chromatog. (GC) coupled with mass spectrometry (MS). The aldehydes selected for research had previously been identified in various species of insects. Minimal inhibitory concentrations of the compounds against strains of entomopathogenic fungi were also determined At the outset, the best SPME extraction conditions were chosen for the anal. to obtain good chromatog. separation The anal. was carried out using a BZ-5 column and different SPME fibers were used to isolate the aldehydes. DVB/CAR/PDMS fiber appeared to be the most efficient coating for undertaking the measurements. The best parameters of separation by HS-SPME and anal. by GC-MS were selected. In addition, the aldehydes were tested for their potential antifungal activity. A procedure was developed to determine the aldehydes using HS-SPME-GC-MS. Heptanal, 2,4-nonadienal, 2-decenal and undecanal were the most effective antifungal compounds against entomopathogenic fungi.

Journal of Microbiological Methods published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Computed Properties of 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Kevresan, Zarko S. published the artcileSpice paprika volatiles as affected by different postharvest ripening treatments of red pepper (Capsicum annuum L.) variety aleva NK, Product Details of C13H16O, the main research area is spice paprika volatile postharvest ripening Capsicum.

The influence of post-harvest ripening conditions of pepper AlevaNK picked in red maturity stage on the composition of volatiles in spice paprika was investigated by GC-MS. The post-harvest ripening in the dark and under daylight was conducted under semi-controlled conditions for two weeks. The obtained chromatograms indicated that the aroma of investigated spice paprika consisted of a large number of volatile compounds regardless of the application and conditions of the post-harvest ripening. The main volatiles of the analyzed paprika samples were fatty acids and their esters, terpenes and terpenoides and aldehydes and ketones. The share of fatty acids and their esters decreased during the post-harvest ripening, and the ripening in the dark favored the decrease. The share of terpenes and terpenoides and the share of aldehydes and ketones in the total volatiles increased during the post-harvest ripening. The post-harvest ripening in the dark favored the increase of the share of terpenes and terpenoides, while the ripening under daylight favored the increase of the share of aldehydes and ketones.

Acta Periodica Technologica published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Product Details of C13H16O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Moreira, Igor Magalhaes da Veiga published the artcileVolatile compounds and protein profiles analyses of fermented cocoa beans and chocolates from different hybrids cultivated in Brazil, Product Details of C13H16O, the main research area is Theobroma chocolate volatile compound protein profile hybrid Brazil; Chocolate quality; Cocoa fermentation; Cocoa varieties; GC–MS; MALDI-TOF MS; Protein profile.

Cocoa beans from different geog. and genetic origins show distinct fermentation dynamics which result in different chocolate qualities. In order to understand the effects of genetic improvement of cocoa plants, in this work volatile compounds and proteins profiles of beginning and end of the fermentation from different cocoa hybrids (CEPEC2004, PH15, PS1319, SJ02) were searched. Moreover, sensorial characterization of the produced chocolate from these hybrids was performed. According to the results obtained, different volatile compounds were identified in fermented beans and in the chocolate produced. Chocolate from CEPEC2004 was the most accepted by judges and correlated with sweet and bitter taste which can be explained by the presence of desired flavor compounds, such as 2,3-butanediol and 2-methyl-1-butanol. A higher presence of acids (undesirable compounds) was observed in chocolates samples from PS1319 hybrid, that have resulted in the low acceptance by judges. In addition, MALDI-TOF MS anal. showed that during fermentation the protein profile was different among the hybrids, which indicates this kind of compounds also contributes to the cocoa-specific flavor.

Food Research International published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Product Details of C13H16O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ascrizzi, Roberta published the artcileFrom the raw seed to chocolate: Volatile profile of Blanco de Criollo in different phases of the processing chain, COA of Formula: C13H16O, the main research area is Theobroma raw seed processing chocolate.

Theobroma cacao L. species (Malvaceae family) comprises a large number of varieties: Criollo is a high value, fine flavor type of cocoa, used to produce high quality chocolate products. Flavor, together with taste, is certainly the most important attribute of chocolate: it is the reason of the global success of this product. While the fine flavor attributes depend on the quality of the raw starting material, the aroma compounds typical of this product are developed during its manufacturing process. The volatile emission profiles of each step of the Amedei Srl processing chain of Blanco de Criollo, a very appreciated variety of cocoa, from the raw seeds to the packaged product, were analyzed by means of HS-SPME coupled with GC-MS. Pyrazines, esters and aldehydes represent the most important aroma-active compounds identified in all the samples. The multivariate statistical anal. of the results was performed and the PCA biplot evidenced the grouping of the samples based on the phase of the processing chain they belong to. To the best of our knowledge, there are no other published studies on the volatile profiling of the entire processing chain of any kind of cocoa.

Microchemical Journal published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, COA of Formula: C13H16O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Braun, Thomas published the artcileEnterochromaffin cells of the human gut: sensors for spices and odorants, Formula: C11H12O3, the main research area is enterochromaffin cell gut calcium olfactory receptor.

Background & Aims: Release of serotonin from mucosal enterochromaffin cells triggered by luminal substances is the key event in the regulation of gut motility and secretion. We were interested to know whether nasal olfactory receptors are also expressed in the human gut mucosa by enterochromaffin cells and whether their ligands and odorants present in spices, fragrances, detergents, and cosmetics cause serotonin release. Methods: Receptor expression was studied by the reverse-transcription polymerase chain reaction method in human mucosal enterochromaffin cells isolated by laser microdissection and in a cell line derived from human enterochromaffin cells. Activation of the cells by odorants was investigated by digital fluorescence imaging using the fluorescent Ca2+ indicator Fluo-4. Serotonin release was measured in culture supernatants by a serotonin enzyme immunoassay and amperometry using carbon fiber microelectrodes placed on single cells. Results: We found expression of 4 olfactory receptors in micro-dissected human mucosal enterochromaffin cells and in a cell line derived from human enterochromaffin cells. Ca2+ imaging studies revealed that odorant ligands of the identified olfactory receptors cause Ca2+ influx, elevation of intracellular free Ca2+ levels, and, consequently, serotonin release. Conclusions: Our results show that odorants present in the luminal environment of the gut may stimulate serotonin release via olfactory receptors present in human enterochromaffin cells. Serotonin controls both gut motility and secretion and is implicated in pathol. conditions such as vomiting, diarrhea, and irritable bowel syndrome. Thus, olfactory receptors are potential novel targets for the treatment of gastrointestinal diseases and motility disorders.

Gastroenterology published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Formula: C11H12O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chun, Jianlin published the artcileVisible-Light Photoredox-Catalyzed Tandem Trifluoro-methylation/Cyclization/Remote Oxidation of 1,6-Dienes: Access to CF3-Containing Five-Membered Heterocycles, Name: 2,3-Dimethoxybenzaldehyde, the main research area is propenyloxypropene togni iridium catalyst photochem trifluoromethylation heterocyclization oxidation; trifluoroethyl oxolane carbaldehyde diastereoselective regioselective green chem; bispropenyl toulenesulfonamide togni iridium catalyst photochem trifluoromethylation heterocyclization oxidation; tosyl trifluoroethyl pyrrolidine carbaldehyde diastereoselective regioselective green chem.

A visible-light photoredox-catalyzed tandem trifluoromethylation/cyclization/remote oxidation of 1,6-dienes was achieved. A broad range of trifluoromethyl group-containing tetrahydrofurans or tetrahydropyrroles were generated in good yields and with excellent diastereoselectivity by using DMSO (DMSO) as the oxidant. The mild and facile protocol afforded direct access to trifluoromethyl group-bearing tetrahydrofurans and tetrahydropyrroles via difunctionalization of olefins.

Advanced Synthesis & Catalysis published new progress about Alkadienes, heteroalkadienes Role: RCT (Reactant), RACT (Reactant or Reagent). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Name: 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem