Category: esters-buliding-blocks

Zhang, Boqin published the artcileEffects of three indigenous non-Saccharomyces yeasts and their pairwise combinations in co-fermentation with Saccharomyces cerevisiae on volatile compounds of Petit Manseng wines, Name: Ethyl nonanoate, the main research area is Petit manseng wine fermentation Saccharomyces cerevisiae volatile compound; Aroma compounds; Dynamic changes; Indigenous non-Saccharomyces strains; Mixed fermentation; Petit Manseng wine.

The combined use of selected Saccharomyces cerevisiae and non-Saccharomyces strains is becoming an effective way to achieve wine products with distinctive aromas. The purpose of this study was to further improve the wine aroma complexity through optimizing inoculation protocols of multi-starters. The three indigenous non-Saccharomyces strains (Torulaspora delbrueckii, Hanseniaspora vineae, and Lachancea thermotolerans) and their pairwise combinations (co-inoculation) were sequentially inoculated with S. cerevisiae in Petit Manseng grape must, resp. Results evidenced a higher divergence in aroma compounds produced by two different non-Saccharomyces species compared to single species. Especially for the combination of T. delbrueckii and L. thermotolerans, the concentrations of most Et esters were further increased, contributing to a higher score of pineapple note in agreement with sensory anal. Our results highlighted that the inoculation of more than one non-Saccharomyces species is a potential strategy to improve the aroma diversity and quality of industrial wines.

Food Chemistry published new progress about Ananas comosus. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Name: Ethyl nonanoate.

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

Zhang, Boqin published the artcileEffects of three indigenous non-Saccharomyces yeasts and their pairwise combinations in co-fermentation with Saccharomyces cerevisiae on volatile compounds of Petit Manseng wines, SDS of cas: 106-32-1, the main research area is Petit manseng wine fermentation Saccharomyces cerevisiae volatile compound; Aroma compounds; Dynamic changes; Indigenous non-Saccharomyces strains; Mixed fermentation; Petit Manseng wine.

The combined use of selected Saccharomyces cerevisiae and non-Saccharomyces strains is becoming an effective way to achieve wine products with distinctive aromas. The purpose of this study was to further improve the wine aroma complexity through optimizing inoculation protocols of multi-starters. The three indigenous non-Saccharomyces strains (Torulaspora delbrueckii, Hanseniaspora vineae, and Lachancea thermotolerans) and their pairwise combinations (co-inoculation) were sequentially inoculated with S. cerevisiae in Petit Manseng grape must, resp. Results evidenced a higher divergence in aroma compounds produced by two different non-Saccharomyces species compared to single species. Especially for the combination of T. delbrueckii and L. thermotolerans, the concentrations of most Et esters were further increased, contributing to a higher score of pineapple note in agreement with sensory anal. Our results highlighted that the inoculation of more than one non-Saccharomyces species is a potential strategy to improve the aroma diversity and quality of industrial wines.

Food Chemistry published new progress about Ananas comosus. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, SDS of cas: 106-32-1.

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

Vollmer, Kathrin published the artcileNon-thermal processing of pineapple (Ananas comosus [L.] Merr.) juice using continuous pressure change technology (PCT): HS-SPME-GC-MS profiling, descriptive sensory analysis, and consumer acceptance, Quality Control of 111-11-5, the main research area is pineapple juice; Juice quality; Non-thermal processing; Pasteurisation; Pineapple; Pressure change technology; Sensory analysis; Volatiles.

The effects of single and twofold continuous pressure change technol. (PCT) applications on the volatiles and sensory characteristics of pineapple juice were studied. Fresh and thermally pasteurised juices were addnl. characterised. 128 volatiles were tentatively assigned in the four juices. Thermal pasteurisation and a single PCT treatment caused substantial losses in total volatiles of 6 and 20%, resp. A second PCT passage further reduced the volatiles (36%) and is thus not recommended. PCT-treated samples were clearly distinguished from the remaining juices by principal component anal. The descriptive sensory profiles, assessed by trained panellists, were not substantially affected by thermal pasteurisation and non-thermal PCT. The fresh juice exhibited a significant fishy off-flavor. In the consumer acceptance test, the thermally pasteurised juice was highly rated compared to both PCT-treated and the fresh juice. This study highlights the potential of PCT to avoid the genesis of off-flavours in fresh-like pineapple juice.

Food Chemistry published new progress about Ananas comosus. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Quality Control of 111-11-5.

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

Martin, Chantal published the artcileSelectively Tunable Luminescence of Perovskite Nanocrystals Embedded in Polymer Matrix Allows Direct Laser Patterning, Quality Control of 142-90-5, the main research area is luminescence perovskite nanocrystal polymer matrix laser patterning.

Cesium lead halide perovskite nanocrystals (NCs) have gained enormous attention as promising light-emitting and light-converting materials. Most of their applications require embedding NCs in various matrixes, which is a challenging task due to their low stability, especially in the case of red-emitting CsPbI3 NCs. In this work, a new approach is proposed allowing the formation of red-emitting perovskite NCs by anion exchange induced directly inside a solid polymer matrix using green-emitting CsPbBr3 NCs as templates and iodododecane as an iodine source. Moreover, a simple and efficient route to photo-assisted termination of the anion exchange reaction in the polymer composite after reaching desired optical properties is demonstrated. The findings allow the authors to pattern a thin composite film with an ultrashort UV laser resulting in a selective generation of green- and red-emitting features with a 15μm resolution

Advanced Optical Materials published new progress about Anion exchange. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Quality Control of 142-90-5.

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

El-Nashar, Heba A. S. published the artcileChemical composition, cytotoxic and anti-arthritic activities of hexane extracts of certain Schinus species, Safety of Methyl docosanoate, the main research area is chem composition cytotoxic anti arthritic hexane extract Schinus species.

The genus Schinus (Anacardiaceae) comprises about 29 species that are utilized in both traditional and current medicine to alleviate various disorders such as rheumatism, bronchial infections, stomach upset, menstrual disturbance, bronchitis, and conjunctivitis. In this study we aimed to investigate the chem. composition of hexane extracts obtained from Schinus polygamous and Schinus terebinthifolius leaves as well as their cytotoxic and anti-arthritic activities. The GC-MS anal. of S. polygamus leaves revealed identification of fifty-five components: being betulin (6.54%), phytol acetate (5.27%), lupeol (3.96%), palmitic acid Me ester (3.58%) and heptacosane (3.25%). While, seventeen compounds were identified in S. terebinthifolius leaves, predominately characterized by phytol (14.70%), lupeol (13.33%), linolenic acid Me ester (11.17%), palmitic acid Me ester (7.74%), and 28-oxours-12-en-3-yl acetate (7.44%). Both extracts showed moderate cytotoxic activities against hepatocellular carcinoma cells with IC50 values of 102.65 and 65.55μg/mL, resp. While colorectal carcinoma cell line presented IC50 values of 217.78 and 83.55μg/mL, resp. Further, both extracts provided moderate anti-arthritic effects (IC50: 80.12 and 63.09μg/mL, resp.) using protein denaturation test, compared to diclofenac sodium (IC50 = 15.12μg/mL).

Journal of Pharmacy and Pharmacology (Wilmington, DE, United States) published new progress about Antiarthritics. 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

Al-Rajhi, Aisha M. H. published the artcileMolecular Interaction Studies and Phytochemical Characterization of Mentha pulegium L. Constituents with Multiple Biological Utilities as Antioxidant, Antimicrobial, Anticancer and Anti-Hemolytic Agents, Name: Methyl docosanoate, the main research area is Mentha Bacillus luteolin chrysoeriol antioxidant antimicrobial anticancer mol interaction; Mentha pulegium; anticancer; anticoagulant; antimicrobial; antioxidant.

Multiple biol. functions of Mentha pulegium extract were evaluated in the current work. Phytochem. components of the M. pulegium extract were detected by Gas Chromatog.-Mass Spectrometry (GC-MS) and High-performance liquid chromatog. (HPLC). Moreover, M. pulegium extract was estimated for antioxidant potential by 2,2-Diphenyl-1-picryl-hydrazyl-hydrate (DPPH) free radical scavenging, antimicrobial activity by well diffusion, and anticoagulant activity via prothrombin time (PT) and activated partial thromboplastin time (APTT). GC-MS anal. detected compounds including cholesterol margarate, stigmast-5-en-3-ol, 19-nor-4-androstenediol, androstan-17-one, pulegone-1,2-epoxide, isochiapin B, dotriacontane, hexadecanoic acid and neophytadiene. Chrysoeriol (15.36 μg/mL) was followed by kaempferol (11.14 μg/mL) and 7-OH flavone (10.14 μg/mL), catechin (4.11 μg/mL), hisperdin (3.05 μg/mL), and luteolin (2.36 μg/mL) were detected by HPLC as flavonoids, in addition to ferulic (13.19 μg/mL), cinnamic (12.69 μg/mL), caffeic (11.45 μg/mL), pyrogallol (9.36 μg/mL), p-coumaric (5.06 μg/mL) and salicylic (4.17 μg/mL) as phenolics. Antioxidant activity was detected with IC50 18 μg/mL, hemolysis inhibition was recorded as 79.8% at 1000 μg/mL, and PT and APTT were at 21.5 s and 49.5 s, resp., at 50 μg/mL of M. pulegium extract The acute toxicity of M. pulegium extract was recorded against PC3 (IC50 97.99 μg/mL) and MCF7 (IC50 80.21 μg/mL). Antimicrobial activity of M. pulegium extract was documented against Bacillus subtilis, Escherichia coli, Pseudomonasaureus, Candida albicans, Pseudomonas aeruginosa, but not against black fungus Mucor circinelloides. Mol. docking was applied using MOE (Mol. Operating Environment) to explain the biol. activity of neophytadiene, luteolin, chrysoeriol and kaempferol. These compounds could be suitable for the development of novel pharmacol. agents for treatment of cancer and bacterial infections.

Molecules published new progress about Anticoagulants. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Name: Methyl docosanoate.

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

O’Malley, Elissa published the artcilePer capita loads of organic UV filters in Australian wastewater influent, HPLC of Formula: 71617-10-2, the main research area is wastewater organic UV filter Australia; Australia; Census; Influent; Sunscreen; UV filter; Wastewater.

Per capita loads of six UV filters were estimated in wastewater influent samples from 36 wastewater treatment plants in Australia collected over a weekend period during the 2016 Australian Census. Of the analyzed samples, 99% contained at least one of the target compounds Ph benzimidazole sulfonic acid (PBSA) was the most prevalent (99%), followed by benzophenone 4 (BP4) (97%), benzophenone 3 (BP3) (87%), benzophenone 1 (BP1) (84%), 4-methylbenzylidene camphor (4-MBC) (22%) and isoamyl 4-methoxycinnamate (IMC) (1.5%). The highest concentrations were 3780 and 5070 ng L-1 for PBSA and BP4, resp. Total per capita UV filter loads in influent across all plants were calculated using population data from the Australian Census and ranged from 0.21 to 3.4 mg day-1 person-1. Notably, a relationship was found between latitude and total per capita daily mass load of UV filters with an increase in mass load from southern to northern catchments. Compared to international studies, mass loads were generally similar with higher loads of BP4 found in Australia. This study provides insight into the occurrence of UV filters in influent wastewater from across Australia and provides the first comprehensive nationwide baseline of UV filter loads.

Science of the Total Environment published new progress about Solar radiation. 71617-10-2 belongs to class esters-buliding-blocks, name is Isopentyl 3-(4-methoxyphenyl)acrylate, and the molecular formula is C15H20O3, HPLC of Formula: 71617-10-2.

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

Zhang, Ning published the artcileChanges of amygdalin and volatile components of apricot kernels during the ultrasonically-accelerated debitterizing, Related Products of esters-buliding-blocks, the main research area is amygdalin apricot kernel ultrasonic debitterizing; Amygdalin; Apricot kernels; Debitterizing; Epimerization; Volatile components.

Ultrasound has been regarded as an efficient novel technique for debitterizing of the apricot kernels, but its influence is severely concerned on the possible epimerization of D-amygdalin to the L-amygdalin, a more potentially toxigenic compound Considering this, the experiments were conducted to investigate the epimerization of D-amygdalin and the volatile components in the debitterizing water, which were separated and identified by the high performance liquid chromatog. (HPLC) and gas chromatog. with a mass spectrometer (GC-MS), resp. The results indicate that the ultrasonically-debitterizing did not cause the epimerization of D-amygdalin to the L-amygdalin, while the procedure can be greatly accelerated due to the rapid mass transfer and degradation of D-amygdalin induced by ultrasound irradiation In addition, the water from the ultrasonically-debitterizing of apricot kernels exerted more aromas compared with that of the conventional debitterizing, which might have more applications about this kind of water. In a word, ultrasound can be safely applied in the debitterizing industry of apricot kernels.

Ultrasonics Sonochemistry published new progress about Ultrasonication. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Related Products of esters-buliding-blocks.

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

Wang, Yue published the artcileDietary supplementation with inulin improves lactation performance and serum lipids by regulating the rumen microbiome and metabolome in dairy cows, Application of Methyl octanoate, the main research area is inulin diet lactation dairy cow serum lipid microbiome metabolome; Dairy cow; Inulin; Metabolomics; Milk quality; Ruminal microbiota; Serum lipid.

This study investigated the effects of inulin on rumen fermentation parameters, ruminal microbiome and metabolites, as well as lactation performance and serum indexes in dairy cows. Sixteen Holstein dairy cows with similar body conditions were randomly divided into 2 groups (n = 8 per group), with inulin addition at 0 and 200 g/d per cow. The experiment lasted for 6 wk, including a 1-wk adaptation period and a 5-wk treatment period. At the end of the exptl. period, the milk, serum and rumen fluid were sampled and analyzed. The microbiome and metabolome in the rumen fluid were analyzed via 16S rRNA sequencing and untargeted metabolomics, resp. The results showed that supplementation with inulin (200 g/d per cow) increased the milk yield (P = 0.001), milk protein (P = 0.032), lactose rate (P = 0.004) and proportion of saturated fatty acids (SFA) in milk (P < 0.001), but decreased the proportion of unsaturated fatty acids (USFA) (P = 0.041). Rumen pH (P = 0.040) and the concentration of NH3-N (P = 0.024) were decreased; however, acetate (P < 0.001), propionate (P = 0.003), butyrate (P < 0.001) and lactic acid (LA) (P = 0.043) were increased. The total cholesterol (TC) (P = 0.008) and triglycerides (TG) (P = 0.01) in serum were also reduced. Addnl., inulin addition elevated the relative abundance of several beneficial symbiotic and short-chain fatty acid (SCFA)-producing bacteria, such as Muribaculaceae (false discovery rate [FDR]-adjusted P < 0.01), Acetitomaculum (FDR-adjusted P = 0.043), and Butyrivibrio (FDR-adjusted P = 0.036), while elevating the levels of L-lysine (FDR-adjusted P = 4.24 x 10-3), L-proline (FDR-adjusted P = 0.0158), and L-phenylalanine (FDR-adjusted P = 0.027). In contrast, several pathogens and ruminal bacteria abundant in high-fat diets, such as Escherichia-Shigella (FDR-adjusted P = 0.022), Erysipelotrichaceae__UCG-004 (FDR-adjusted P < 0.01) and RF39 (FDR-adjusted P = 0.042) were decreased along with the reduction of lysophosphatidylcholine (LysoPC) (18:1 (9Z)) (FDR-adjusted P = 1.03 x 10-3), LysoPC (16:0) (FDR-adjusted P = 0.0108), LysoPC (18:2 (9Z, 12Z)) (FDR-adjusted P = 1.65 x 10-3) and 8-methylnonenoate. In conclusion, dietary inulin supplementation could increase the relative abundance of commensal microbiota and SCFA-producing bacteria, upregulate amino acidmetabolism and downregulate lipid metabolism in the rumen of dairy cows, which might further improve lactation performance and the level of serum lipids. Animal Nutrition published new progress about Acetitomaculum. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Application of Methyl octanoate.

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

Bodachivskyi, Iurii published the artcileMetal triflates are tunable acidic catalysts for high yielding conversion of cellulosic biomass into ethyl levulinate, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is metal triflate acidic catalyst ethyl levulinate cellulosic yielding conversion.

Metal triflates and their mixtures with Bronsted acids are excellent catalysts for the selective and high yielding transformation of microcrystalline cellulose into Et levulinate, in ethanol, producing synergistic catalyst effects in some instances. The pretreatment of raw and unrefined cellulosic materials with a deep eutectic solvent enables similarly excellent catalyzed conversion thereof into Et levulinate in superb yield (up to 75%) and selectivity (up to 88%). When using fermentation-derived ethanol, the product possesses 100% renewable content.

Fuel Processing Technology published new progress about Acid catalysis. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Recommanded Product: Ethyl 4-oxopentanoate.

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