Month: December 2022

Fracassetti, Daniela published the artcileLight-Struck Taste in White Wine: Protective Role of Glutathione, Sulfur Dioxide and Hydrolysable Tannins, SDS of cas: 123-29-5, the main research area is white wine light struck taste; glutathione sulfur dioxide hydrolyze tannin; glutathione; hydrolysable tannins; light-struck taste; storage; sulfur dioxide; white wine.

Light exposure of white wine can cause a light-struck taste (LST), a fault induced by riboflavin (RF) and methionine (Met) leading to the formation of volatile sulfur compounds (VSCs), including methanethiol (MeSH) and di-Me disulfide (DMDS). The study aimed to investigate the impact of different antioxidants, i.e., sulfur dioxide (SO2), glutathione (GSH) and chestnut tannins (CT), on preventing LST in model wine (MW) and white wine (WW), both containing RF and Met. Both MW and WW samples were added with the antioxidants, either individually or in different combinations, prior to 2-h light exposure and they were stored in the dark for 24 mo. As expected, the light induced the degradation of RF in all the conditions assayed. Met also decreased depending on the antioxidants added. The presence of antioxidants limited the formation of LST as lower concentrations of VSCs were found in both MW and WW samples. In the latter matrix, neither MeSH nor DMDS were detected in the presence of CT, while only DMDS was found in WW+GSH, WW+SO2+GSH and WW+CT+SO2 samples at a concentration lower than the perception thresholds. Considering the antioxidants individually, the order of their effectiveness was CT ≥ GSH > SO2 in WW under the adopted exptl. conditions. The results indicate tannins as an effective enol. tool for preventing LST in white wine and their use will be further investigated in different white wines under industrial scale.

Molecules published new progress about Anaerobic oxidation. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, SDS of cas: 123-29-5.

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

Pappas, Dimitris published the artcileBeyond microcystins: cyanobacterial extracts induce cytoskeletal alterations in rice root cells, HPLC of Formula: 2044-85-1, the main research area is microcystin cyanobacterial extract induce rice root cell cytoskeletal alteration; F-actin; Oryza sativa; bioactive compounds; cyanobacteria; cytoskeleton; microcystins; microtubules; oxidative stress; plant cell.

Microcystins (MCs) are cyanobacterial toxins and potent inhibitors of protein phosphatases 1 (PP1) and 2A (PP2A), which are involved in plant cytoskeleton (microtubules and F-actin) organization. Therefore, studies on the toxicity of cyanobacterial products on plant cells have so far been focused on MCs. In this study, we investigated the effects of extracts from 16 (4 MC-producing and 12 non-MC-producing) cyanobacterial strains from several habitats, on various enzymes (PP1, trypsin, elastase), on the plant cytoskeleton and H2O2 levels in Oryza sativa (rice) root cells. Seedling roots were treated for various time periods (1, 12, and 24 h) with aqueous cyanobacterial extracts and underwent either immunostaining for α-tubulin or staining of F-actin with fluorescent phalloidin. 2,7-dichlorofluorescein diacetate (DCF-DA) staining was performed for H2O2 imaging. The enzyme assays confirmed the bioactivity of the extracts of not only MC-rich (MC+), but also MC-devoid (MC-) extracts, which induced major time-dependent alterations on both components of the plant cytoskeleton. These findings suggest that a broad spectrum of bioactive cyanobacterial compounds, apart from MCs or other known cyanotoxins (such as cylindrospermopsin), can affect plants by disrupting the cytoskeleton.

International Journal of Molecular Sciences published new progress about Anabaena variabilis. 2044-85-1 belongs to class esters-buliding-blocks, name is 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, and the molecular formula is C24H14Cl2O7, HPLC of Formula: 2044-85-1.

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

Bonaterra, Gabriel A. published the artcileAnti-inflammatory and anti-oxidative effects of Phytohustil and root extract of Althaea officinalis L. on macrophages in vitro, Recommanded Product: 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, the main research area is phytohustil root Althaea officinalis macrophage antiinflammation antioxidative effect; Althaea officinalis L.; Phytohustil®; ROS; anti-inflammatory; anti-oxidative; macrophage; marshmallow; migration.

The medicinal plant marshmallow Althaea officinalis L. (A. officinalis), is used for the treatment of cough since centuries. Application of medicinal extracts of marshmallow roots shows immediate effects like a protective film on the inflamed mucosa. Because the soothing layer reduce irritation of the mucous system, a faster regeneration is supported by defense mechanisms required to protect the respiratory tract from environmental injury. Macrophages (Mφ), which belong to a group of multipurpose defensive cells, provide the first line of defense against mucosal invasive pathogens. The present study was performed to investigate, whether the herbal medicinal product has anti-inflammatory or anti-oxidative effects on pro-inflammatorily activated Mφ or after oxidative stress induction. Special attention should be payed to elucidate the effects of A. officinalis on the mechanism of intracellular defense as well as on migratory capacity of the Mφ. Treatment of PMA-differentiated human THP-1 Mφ with Phytohustil increased their viability without affecting the cell number Phytohustil or root extracts of A. officinalis (REAo) – an active component of Phytohustil – were able to protect human Mφ against H2O2-induced cytotoxicity and H2O2-induced ROS production Phytohustil, REAo or diclofenac used as anti-inflammatory referance substance, inhibited the LPS-induced release of tumor necrosis factor-alpha (TNF-α) as well as of IL6 in Mφ. Treatment with Phytohustil, its excipients or REAo did not impair the mitochondrial membrane potential (MMP). Finally, Phytohustil and REAo activated the migratory capacity of Mφ. The present in vitro investigations indicate protective, i.e., anti-oxidative and anti-inflammatory effects of REAo and Phytohustil, addnl. improving the migratory capacity of Mφ. These antiinflammatory effects were similar or even better than diclofenac. Thus, our data support and may explain the pos. effect of Phytohustil observed in patients during the therapy of inflamed buccal mucosal membranes or treatment of cough.

Frontiers in Pharmacology published new progress about Althaea officinalis. 2044-85-1 belongs to class esters-buliding-blocks, name is 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, and the molecular formula is C24H14Cl2O7, Recommanded Product: 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate.

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

Qian, Yanping L. published the artcileCharacterization of Qingke Liquor Aroma from Tibet, Related Products of esters-buliding-blocks, the main research area is Qingke liquor aroma; Q-value; Qingke liquor; aroma extract dilution analysis; odor active value; stable isotope dilution analysis.

Qingke liquor is a very famous Tibetan alc. beverage made from “”Qingke””, hull-less highland barley, which is exclusively grown in Qinghai-Tibetan Plateau with an average altitude of 4000 m. Qingke liquor made in such an area whose quality or characteristics is a result of its geog. environment, including natural and human culture. In this study, the aroma compounds in two Qingke liquors made from highland barley grown at different elevations (QKH, high elevation, and QKL, low elevation) were compared by aroma extract dilution anal. (AEDA), aroma intensity (Osme), odor activity values (OAVs, ratio of concentration to odor threshold), and aroma recombination. Results revealed Et acetate, Et 2-Me propanoate, Et butanoate, Et 3-Me butanoate, Et pentanoate, Et hexanoate, Et octanoate, 3-methylbutanal, 3-methyl-1-butanol, 1-octen-3-ol, β-damascenone, 2,3-butanedione (diacetyl), acetoin, and 2-methoxyphenol (OAV ≥ 10) as important aroma active compounds to Qingke liquors. However, QKH had higher OAVs for most of the compounds than that of QKL. An aroma recombination study confirmed the anal. of aroma-active compounds in Qingke liquor, whereas the aroma emission test demonstrated 3-methylbutanal as the key aroma compound for both Qingke liquors.

Journal of Agricultural and Food Chemistry published new progress about Alcoholic beverages. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Related Products of esters-buliding-blocks.

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

Marquez-Lemus, Mario published the artcileAssessment of the variation of the volatile compound composition and antioxidant activity in Opuntia fruits liquors during the maceration process, Recommanded Product: Ethyl nonanoate, the main research area is volatile compound antioxidant Opuntia fruit liquor maceration.

Opuntia genus belongs to the Cactaceae family, Mexico is the major producer in the world. Due to Opuntia’s phytochem. content and their health-related benefits, was proposed the elaboration of liquor using Opuntia fruit. Phenolic content, volatile aromatic profile, antioxidant activity, and sensory evaluation were carried out to characterize the liquor. Sensorial evaluation results showed that L-2D (2 day-macerated liquor) has the higher consumers’ acceptance. Moreover, L-2D had the highest content of volatile compounds (348 mg/L), and the highest antioxidant activity (1.29, 1.63 and 2.05 mmol Trolox/L, according to ABTS, DPPH and FRAP methods, resp.). We could identify and quantify 29 volatile compounds, being Et acetate and D-limonene those with the highest content. Quercitrin was the most abundant phenolic compound in the liquor. The findings of this study demonstrate that Opuntia liquor is a rich source of phenolics and aromatic compounds that would be a drink with the probability of being commercialize.

CyTA–Journal of Food published new progress about Alcoholic beverages. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Recommanded Product: Ethyl nonanoate.

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

Voutyritsa, Errika published the artcilePhotocatalytic atom transfer radical addition to olefins utilizing novel photocatalysts, Computed Properties of 583-04-0, the main research area is ruthenium photocatalyst atom transfer radical addition; ATRA reactions; olefins; photocatalysis; ruthenium-based complexes; sustainable catalysis.

Photocatalysis is a rapidly evolving area of research in modern organic synthesis. Among the traditional photocatalysts, metal-complexes based on ruthenium or iridium are the most common. Herein, we present the synthesis of two photoactive, ruthenium-based complexes bearing pyridine-quinoline or terpyridine ligands with extended aromatic conjugation. Our complexes were utilized in the atom transfer radical addition (ATRA) of haloalkanes to olefins, using bromoacetonitrile or bromotrichloromethane as the source of the alkyl group. The tailor-made ruthenium-based catalyst bearing the pyridine-quinoline bidentate ligand proved to be the best-performing photocatalyst, among a range of metal complexes and organocatalysts, efficiently catalyzing both reactions. These photocatalytic atom transfer protocols can be expanded into a broad scope of olefins. In both protocols, the photocatalytic reactions led to products in good to excellent isolated yields.

Molecules published new progress about Alkenes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, Computed Properties of 583-04-0.

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

Zhu, Qing published the artcileChemical Composition and Antimicrobial Activity of the Essential Oil From Euphorbia helioscopia L., Safety of Ethyl pentadecanoate, the main research area is Euphorbia helioscopia essential oil antimicrobial activity chem composition.

The chem. composition and antimicrobial activity of the essential oil from the aerial parts of Euphorbia helioscopia L. were investigated by gas chromatog.-mass spectrometry (GC-MS), GC, and microdilution methods. Thirty-five compounds, representing 83.51% of the total oil, were identified. 1,6-Dihydrocarveol (31.39%), carvone (16.79%), menthol (8.23%), and trans-dihydrocarvone (5.53%) were the principal constituents of the oil. The essential oil exhibited strong antimicrobial activity against strains of the bacteria, Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Shigella dysenteriae, and a strain of the fungus Candida albicans with a minimal inhibitory concentration value of 31.25μg/mL and min. bactericidal concentration values of 31.25μg/mL (S. aureus), 62.50μg/mL (E. faecalis), >62.50μg/mL (E. coli), >62.50μg/mL (S. dysenteriae), and >62.50μg/mL (C. albicans). These results indicated that the essential oil from the aerial parts of E. helioscopia could be used to control diseases caused by these microbes.

Natural Product Communications published new progress about Alkenes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, Safety of Ethyl pentadecanoate.

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

Zhu, Qing published the artcileChemical Composition and Antimicrobial Activity of the Essential Oil From Euphorbia helioscopia L., Formula: C11H22O2, the main research area is Euphorbia helioscopia essential oil antimicrobial activity chem composition.

The chem. composition and antimicrobial activity of the essential oil from the aerial parts of Euphorbia helioscopia L. were investigated by gas chromatog.-mass spectrometry (GC-MS), GC, and microdilution methods. Thirty-five compounds, representing 83.51% of the total oil, were identified. 1,6-Dihydrocarveol (31.39%), carvone (16.79%), menthol (8.23%), and trans-dihydrocarvone (5.53%) were the principal constituents of the oil. The essential oil exhibited strong antimicrobial activity against strains of the bacteria, Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Shigella dysenteriae, and a strain of the fungus Candida albicans with a minimal inhibitory concentration value of 31.25μg/mL and min. bactericidal concentration values of 31.25μg/mL (S. aureus), 62.50μg/mL (E. faecalis), >62.50μg/mL (E. coli), >62.50μg/mL (S. dysenteriae), and >62.50μg/mL (C. albicans). These results indicated that the essential oil from the aerial parts of E. helioscopia could be used to control diseases caused by these microbes.

Natural Product Communications published new progress about Alkenes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Formula: C11H22O2.

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

de Aquino, Adriana M. published the artcileEvaluation of molecular properties of humic acids from vermicompost by 13 C-CPMAS-NMR spectroscopy and thermochemolysis-GC-MS, Safety of Methyl docosanoate, the main research area is carbon vermicompost humic acid thermochemolysis GCMS CPMAS NMR spectroscopy.

The mol. characteristics of different vermicomposts, produced with variable rates of cattle manure and cotton residues, and of related humic acids were determined by 13C-CPMAS NMR and Off-line pyrolysis THM-GC-MS. The analyses highlighted a composition of mature vermicomposts based on differential amounts of lignocellulosic fraction and alkyl compounds inherited from original biomasses, thus revealing a decrease of overall hydrophobic character at increasing amounts of cotton input. The evaluation of mol. parameters derived from both solid state NMR spectra and from the specific biomarkers released by thermochemolysis suggested that the humification process was mainly characterized by the selective preservation of specific lignin derivatives The potential bioactive properties of humic acids were hence evaluated in a bioassays test on maize seedlings. The humic extracts showed a differential response in root growth-promoting effect, depending on the specific mol. features. The higher bioactivity found in humic components isolated from vermicompost with no or low addition of cotton residues, supported the role of the overall hydrophobic character and of the large content of bioavailable lignin units and nitrogen moieties. These results confirm that the combination of solid state NMR and thermochemolysis are valuable and efficient tools to assess the mol. quality of natural organic matter. The detailed mol. characterization of compost materials may hence represent a useful requirement to select the most suitable application of bulk biomasses and derived fractions for soil organic matter managements.

Journal of Analytical and Applied Pyrolysis published new progress about Alkanes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Safety of Methyl docosanoate.

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

Baranauskiene, Renata published the artcileValorisation of Roman chamomile (Chamaemelum nobile L.) herb by comprehensive evaluation of hydrodistilled aroma and residual non-volatile fractions, HPLC of Formula: 110-42-9, the main research area is Chamaemelum nobile hydrodistilled aroma nonvolatile fraction valorisation; Antioxidant capacity; Chamaemelum nobile L.; Deodorized acetone extract; Essential oil; Growth phases; Water extract.

Valorization of botanicals for the development of natural food-grade ingredients is an important task in terms of sustainability and processing waste reduction In this study, Roman chamomile (Chamaemelum nobile L.) herb was collected at six different vegetation phases in the period 26 May – 23 August 2019 and subjected to biorefining into the several valuable fractions. The yield of hydro-distilled essential oil (EO) was in the range of 0.22% (intensive vegetative growth) to 0.80% (full flowering). Angelic, isobutyric, butyric and methacrylic acid esters and some monoterpene and sesquiterpene derivatives were the major EO constituents: 3-methylpentyl angelate (20.11-27.56%), methallyl angelate (7.28-10.33%), isoamyl angelate (5.57-9.02%), iso-Bu angelate (4.84-6.79%), 2-methylbutyl angelate (3.11-6.32%), 3-methylamyl methacrylate (5.04-6.17%), 3-methylpentyl isobutyrate (4.29-6.64%), 3-methylamyl isobutyrate (4.29-6.64%), α-pinene (1.61-6.37%) and pinocarvone (1.46-4.67%). In order to valorize water soluble and solid EO distillation residues their antioxidant potential was evaluated by several in vitro assays: water extracts were considerably stronger antioxidants than acetone extracts isolated from the solid residues. Water extracts of the plants collected at flowering phases were the strongest antioxidants; their TPC, FRAP and ORAC values were up to 143.2 mg gallic acid equivalent/g, 650, and 5601 μmol TE/g dry extract, resp., while effective concentrations (EC50) of DPPH• and ABTS•+ scavenging, were down to 0.59 and 0.49 mg/mL, resp. Among 7 tentatively identified by UPLC/Q-TOF/MS phenolic constituents the intensity of mol. ion of 3,5-dicaffeoyl quinic acid was the largest. The results obtained may assist for developing flavorings, antioxidants and health beneficial preparations from C. nobile extracts

Food Research International published new progress about Alkanes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, HPLC of Formula: 110-42-9.

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