Tag: 100-200

Changes in functional components and biological activity of Lycium barbarum after fermentation with Kombucha SCOBY was written by Zhang, Shuo;Tang, Yuxin;Chen, Julong. And the article was included in Journal of Food Processing and Preservation in 2022.Related Products of 706-14-9 This article mentions the following:

Kombucha, fermented via symbiotic colony of bacteria and yeast (SCOBY) with black tea, is applied as a nova microbial method for processing traditional Chinese medicine (TCM). In this study, Lycium barbarum was used as the substrate combined with Kombucha SCOBY to enhance its antioxidant activities and flavor composition The result indicated that the antioxidant activities of L. barbarum fermentation broth (LBF) was increased and 16.51% higher compared to the infusion. Besides, the inhibition zone of LBF on the 10th day against Escherichia coli and Staphylococcus aureus reached the maximum of 18.80 and 21.85 mm. Three typical L. barbarum polysaccharides, including LBP1, LBP2, and LBP3, were extracted and their compositions were identified. Among them, the DPPH scavenging rate and reducing power of LBP2 were 67.36% and 0.612 which were both higher than others. Furthermore, SOD enzyme and cellulase activity of LBF on 10th day were improved by 92.41% and 2.27 times, resp. Thirty-one aroma compounds were determined in Lycium barbarum Kombucha ferment via GC-MS. The strongest flavor of the LBF was sourness while the weakest flavor was saltiness which was analyzed through the electronic tongue. Our research provides a theor. basis for the development of functional L. barbarum Kombucha product and explores the application of Kombucha SCOBY in processing TCM. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9Related Products of 706-14-9).

5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Related Products of 706-14-9

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

Synthesis and Structure-Activity Relationship Studies of Benzo[b][1,4]oxazin-3(4H)-one Analogues as Inhibitors of Mycobacterial Thymidylate Synthase X was written by Modranka, Jakub;Li, Jiahong;Parchina, Anastasia;Vanmeert, Michiel;Dumbre, Shrinivas;Salman, Mayla;Myllykallio, Hannu;Becker, Hubert F.;Vanhoutte, Roeland;Margamuljana, Lia;Nguyen, Hoai;Abu El-Asrar, Rania;Rozenski, Jef;Herdewijn, Piet;De Jonghe, Steven;Lescrinier, Eveline. And the article was included in ChemMedChem in 2019.Related Products of 16413-26-6 This article mentions the following:

Since the discovery of a flavin-dependent thymidylate synthase (ThyX or FDTS) that is absent in humans but crucial for DNA biosynthesis in a diverse group of pathogens, the enzyme has been pursued for the development of new antibacterial agents against Mycobacterium tuberculosis, the causative agent of the widespread infectious disease tuberculosis (TB). In response to a growing need for more effective anti-TB drugs, we have built upon our previous screening efforts and report herein an optimization campaign of a novel series of inhibitors with a unique inhibition profile. The inhibitors display competitive inhibition toward the methylene tetrahydrofolate cofactor of ThyX, enabling us to generate a model of the compounds bound to their target, thus offering insight into their structure-activity relationships. In the experiment, the researchers used many compounds, for example, 3-Cyanophenylisocyanate (cas: 16413-26-6Related Products of 16413-26-6).

3-Cyanophenylisocyanate (cas: 16413-26-6) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Related Products of 16413-26-6

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

Unravelling microbial populations and volatile organic compounds of artisan fermented liver sausages manufactured in Central Italy was written by Belleggia, Luca;Ferrocino, Ilario;Reale, Anna;Haouet, M. Naceur;Corvaglia, Maria Rita;Milanovic, Vesna;Boscaino, Floriana;Di Renzo, Tiziana;Di Bella, Sara;Borghi, Monica;Farneti, Silvana;Cesaro, Cristiana;Garofalo, Cristiana;Cardinali, Federica;Aquilanti, Lucia;Musari, Evan;Cocolin, Luca;Osimani, Andrea. And the article was included in Food Research International in 2022.Computed Properties of C6H10O2 This article mentions the following:

The aim of the present study was to obtain information on the occurrence of bacteria and eumycetes in ready-to-eat fermented liver sausages manufactured by 20 artisan producers located in the Marche Region (Italy). To this end, culture-dependent analyses and metataxonomic sequencing were carried out. Physico-chem. parameters and volatilome of the fermented liver sausages were also studied. Finally, the presence of hepatitis E virus (HEV) was also assessed via real-time-RT-(q)PCR assays. Active microbial populations mainly represented by lactic acid bacteria, enterococci, coagulase-neg. cocci, and eumycetes were detected. Enterobacteriaceae, Pseudomonadaceae, and sulfite-reducing anaerobes were not detected in most of the samples. Latilactobacillus sakei dominated in all the analyzed samples, reaching abundances up to 80%. Staphylococcus xylosus and Staphylococcus equorum were also detected. Among minority bacterial taxa, Weissella spp., Leuconostoc spp., Macrococcus caseolyticus, Brochothrix thermosphacta, Staphylococcus succinus, Lactobacillus coryniformis, Lactiplantibacillus plantarum, Lactococcus garviae, Psychrobacter spp., and Carnobacterium viridans were detected. The mycobiota was mainly composed by Debaryomyces hansenii that was present in all samples at the highest frequency. Among minority fungal taxa, Aspergillus spp., Penicillium spp., Kurtzmaniella zeylanoides, Candida spp., Yamadazyma spp., Scopulariopsis spp., Yarrowia spp., and Starmerella spp. were detected. Interestingly, associations between some taxa and some physico-chem. parameters were also discovered. The absence of HEV in all the samples attested a high level of safety. Finally, most of the VOCs detected in the analyzed fermented liver sausages belonged to six classes as: terpenoids, aldehydes, ketones, alcs., esters, and acids. Nitrogen compounds, sulfur compounds, phenols, hydrocarbons, lactones, furans, and aromatic hydrocarbons were also identified. Several significant relationships were observed between mycobiota and VOCs. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Computed Properties of C6H10O2).

5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Computed Properties of C6H10O2

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

Characterization and Synergistic Effect of Antifungal Volatile Organic Compounds Emitted by the Geotrichum candidum PF005, an Endophytic Fungus from the Eggplant was written by Mookherjee, Abhirup;Bera, Paramita;Mitra, Adinpunya;Maiti, Mrinal K.. And the article was included in Microbial Ecology in 2018.Synthetic Route of C10H20O2 This article mentions the following:

Plant-associated endophytes are recognized as sources of novel bioactive mols. having diverse applications. In this study, an endophytic yeast-like fungal strain was isolated from the fruit of eggplant (Solanum melongena) and identified as Geotrichum candidum through phenotypic and genotypic characterizations. This endophytic G. candidum isolate PF005 was found to emit fruity scented volatiles. The compositional profiling of volatile organic compounds (VOCs) revealed the presence of 3-methyl-1-butanol, Et 3-methylbutanoate, 2-phenylethanol, isopentyl acetate, naphthalene, and iso-Bu acetate in significant proportion when analyzed on a time-course basis. The VOCs from G. candidum exhibited significant mycelial growth inhibition (54%) of phytopathogen Rhizoctonia solani, besides having mild antifungal activity against a few other fungi. The source of carbon as a nutrient was found to be an important factor for the enhanced biosynthesis of antifungal VOCs. The antifungal activity against phytopathogen R. solani was improved up to 91% by feeding the G. candidum with selective precursors of alc. and ester volatiles. Furthermore, the antifungal activity of VOCs was enhanced synergistically up to 92% upon the exogenous addition of naphthalene (1.0 mg/plate). This is the first report of G. candidum as an endophyte emitting antifungal VOCs, wherein 2-penylethanol, isopentyl acetate, and naphthalene were identified as important contributors to its antifungal activity. Possible utilization of G. candidum PF005 as a mycofumigant has been discussed based upon its antifungal activity and the qualified presumption of safety status. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Synthetic Route of C10H20O2).

Isopentyl 3-methylbutanoate (cas: 659-70-1) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Synthetic Route of C10H20O2

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

A novel method for the preparation of acid-sensitive epoxides from olefins with the combined use of molecular oxygen and an aldoacetal catalyzed by a cobalt(II) complex was written by Yorozu, Kiyotaka;Takai, Toshihiro;Yamada, Tohru;Mukaiyama, Teruaki. And the article was included in Bulletin of the Chemical Society of Japan in 1994.Related Products of 15399-05-0 This article mentions the following:

An efficient synthesis of acid-sensitive epoxides, such as chromene oxide or the epoxide of an γ,δ-unsaturated alc., was successfully achieved by the oxygenation of olefins with the combined use of 1 atm of O₂ and an aldehyde acetal catalyzed by a cobalt(II) complex containing a 1,3-diketone ligand. The reactions proceeded under mild and neutral conditions, and the desired epoxides were obtained in good yields. Neither overoxidn. nor decomposition of the epoxide was observed Furthermore, various silyl enol ethers and silyl ketene acetals, acid-sensitive compounds, were also smoothly monooxygenated to the corresponding α-hydroxy ketones and α-hydroxy carboxylic acid esters, resp. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0Related Products of 15399-05-0).

Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Related Products of 15399-05-0

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

Contents and compositions of the aroma in “Wasanbon” sugar was written by Matsui, Toshiyuki;Kitaoka, Shozaburo. And the article was included in Journal of Nutritional Science and Vitaminology in 1981.Recommanded Product: 15399-05-0 This article mentions the following:

Wasanbon sugar which is handmade sugar manufactured traditionally in Japan by a unique refining procedure, is used in the making of Japanese traditional confectionery. The contents and compositions of the aroma in Wasanbon sugar and refinery final molasses were determined by column chromatog., gas chromatog., mass spectrometry, and sensory evaluation. The samples are the first press-off molasses (Ara-mitsu molasses), refinery final molasses, Shiroshita sugar (pre-refined sugar), and Wasanbon sugar. In the acidic fraction, the aroma of 3-phenylpropionic acid  [501-52-0] was similar to the stored aroma of Wasanbon sugar, whereas the aroma of its Me ester [103-25-3] was not. Aroma substance content of the weakly acidic fraction in Wasanbon sugar and refinery final molasses were 8.5 – 8.7% of those of the acidic fraction, and their main components were cyclotene  [80-71-7] and maltol,  [118-71-8] formed by thermal degradation of sugar. These components had higher aroma scores than other weakly acidic fraction aromas, by a paired preference test. Cyclotene and maltol increased about 3.7 and 1.5 times, resp., during heating of Shiroshita sugar. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0Recommanded Product: 15399-05-0).

Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Recommanded Product: 15399-05-0

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

Characterisation of the chocolate aroma in roast jackfruit seeds was written by Spada, Fernanda Papa;Balagiannis, Dimitrios P.;Purgatto, Eduardo;do Alencar, Severino Matias;Canniatti-Brazaca, Solange Guidolin;Parker, Jane K.. And the article was included in Food Chemistry in 2021.Name: Isopentyl 3-methylbutanoate This article mentions the following:

The seeds of the jackfruit (Artocarpus heterophyllus Lam.) are an abundant waste-stream in Brazil and a potential source of chocolate aroma. The aim of the study was to characterize the aroma compounds in flours prepared from the roasted jackfruit seeds and compare them with a typical Brazilian cocoa powder. Jackfruits seeds were either left untreated, acidified or fermented before drying and roasting. The volatiles were extracted using solid phase micro extraction or solid phase extraction and analyzed by gas chromatog. mass spectrometry. The most odor-active volatiles were identified by GC-Olfactometry. Most of the compounds known to be odor-active character impact compounds in cocoa products were also found in the jackfruit seed flours, however, the jackfruit seeds produced many addnl. pyrazines, some of which were responsible for the characteristic earthy “roasted jackfruit seed” aroma. The fermented sample had the most similar aroma profile to cocoa powder. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Name: Isopentyl 3-methylbutanoate).

Isopentyl 3-methylbutanoate (cas: 659-70-1) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Name: Isopentyl 3-methylbutanoate

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

A Unified and Desymmetric Approach to Chiral Tertiary Alkyl Halides was written by Zheng, Yin;Zhang, Suihan;Low, Kam-Hung;Zi, Weiwei;Huang, Zhongxing. And the article was included in Journal of the American Chemical Society in 2022.Computed Properties of C10H11FO2 This article mentions the following:

A suite of dinuclear zinc catalysts with a prolinol- or pipecolinol-derived tetradentate ligand reductively desymmetrized a large collection of easily available halomalonic esters to α-halo-β-hydroxyesters were reported. These polyfunctionalized tertiary alkyl fluorides, chlorides, and bromides proved to be useful intermediates toward fluorinated drug analogs and polyhalogenated monoterpenes. The facile intramol. epoxidation of the chiral chloride and bromide products was enabled an expeditious access to natural products containing tertiary alc. motifs. In the experiment, the researchers used many compounds, for example, Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2Computed Properties of C10H11FO2).

Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Computed Properties of C10H11FO2

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

Inter-Tree Variation in the Chemical Composition of Boswellia papyrifera Oleo-Gum-Resin was written by DeCarlo, Anjanette;Agieb, Salah;Johnson, Stephen;Satyal, Prabodh;Setzer, William N.. And the article was included in Natural Product Communications in 2022.COA of Formula: C12H20O2 This article mentions the following:

Frankincense is a fragrant resin produced by Boswellia species, and has been used for centuries as a perfume, medicine, and incense, and is an important cosmetic and therapeutic product today. A number of studies have been conducted on the resin essential oils, but many have used com. sources outside of the country of origin, leading to potential taxonomic confusion or misidentification. Individual Boswellia papyrifera resin samples were each obtained directly from 11 individual trees in Sudan, hydrodistd., the volatile phytochems. determined by gas chromatog. methods, and the chem. compositions subjected to cluster anal. All samples were very similar, with high levels of octyl acetate (49.5%-81.0%) and octanol (6.5%-13.7%), and varying levels of diterpenoids (6.6%-32.7%). The cluster anal. indicated 3 highly similar groups, defined by (1) relatively higher levels of octyl acetate (58.9%-81.0%), but with low levels of diterpenoids (6.6%-18.6%); (2) relatively lower levels of octyl acetate (49.5%-61.3%), but with a higher proportion of diterpenoids (19.0%-22.8%); and (3) with octyl acetate (51.6%) and diterpenoids (32.7%). In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3COA of Formula: C12H20O2).

(E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.COA of Formula: C12H20O2

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

An Inexpensive Air-Stable Titanium-Based System for the Conversion of Esters to Primary Alcohols was written by Reding, Matthew T.;Buchwald, Stephen L.. And the article was included in Journal of Organic Chemistry in 1995.Quality Control of Methyl 2-thienylacetate This article mentions the following:

Polymethylhydrosiloxane, when combined with titanium(IV) isopropoxide, provides a convenient system for the conversion of esters to the corresponding primary alcs. in the presence of a wide range of functional groups. Reactions are carried out as mixtures of the neat reaction components; workup with aqueous alk. THF affords primary alcs. in good to excellent yields. The system tolerates primary alkyl bromides and iodides, olefins, epoxides, and alkynes. Steric differentiation of Me and tert-Bu esters is also possible. The results observed in the parent and related reactions argue against pathways involving Lewis-acid catalysis and anionic hydridosilicate-mediated reductions, and instead support a neutral titanium hydride complex or strongly associated titanium/silane complex as the active reducing agent. In the experiment, the researchers used many compounds, for example, Methyl 2-thienylacetate (cas: 19432-68-9Quality Control of Methyl 2-thienylacetate).

Methyl 2-thienylacetate (cas: 19432-68-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Quality Control of Methyl 2-thienylacetate

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