Category: esters-buliding-blocks

Nski, Alan Gasi published the artcileVolatile compounds content, physicochemical parameters, and antioxidant activity of beers with addition of mango fruit (Mangifera Indica), Synthetic Route of 5405-41-4, the main research area is volatile compound physicochem parameter antioxidant Mangifera Indica; Mangifera indica; beer; gas-chromatography; in-needle SPME; solid-phase microextraction; total polyphenols conent; volatile compounds.

This study was performed to determine the possibility of using mango fruit (Mangifera indica) in brewing technol. The aim of using the SPME-HS-GC-MS technique was to assess what changes occurred in the volatile composition of mango beers brewed in this study. Mango fruit was added to the beer in five different forms to ascertain what kind of preparation should be used to improve beer aroma. Anal. of the volatile components in mango beer showed that beer without mango addition was characterized by the lowest content of volatile compounds (1787.84μg/100 mL). The addition of mango fruit increased the concentration of compounds, such as α-pinene, β-myrcene, terpinolene, α-terpineol, cis-β-ocimene, caryophyllene, and humulene, in beer. Beer prepared with mango pulp addition was characterized by the highest concentration of volatile components from mango beers (2112.15μg/100 mL). Furthermore, beers with mango addition were characterized by a higher polyphenol content (up to 44% higher than control beer) and antioxidant activity than control beer and were evaluated by a trained panel as having a better taste and aroma than beer without fruit addition

Molecules published new progress about Beer. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Synthetic Route of 5405-41-4.

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

De Lange, Elvira S. published the artcileSpodoptera frugiperda Caterpillars Suppress Herbivore-Induced Volatile Emissions in Maize, Related Products of esters-buliding-blocks, the main research area is Spodoptera zea volatile compound hexenal myrcene; Cotesia marginiventris; Cotton; Herbivore-induced plant volatiles; Maize; Parasitoids; Spodoptera exigua; Spodoptera frugiperda; Spodoptera littoralis; Tritrophic interactions.

The vast spectrum of inducible plant defenses can have direct neg. effects on herbivores, or indirect effects, for instance in the form of herbivore-induced plant volatiles (HIPVs) that attract natural enemies. Various arthropods have evolved ways to suppress plant defenses. To test whether this is the case for caterpillar-induced HIPVs, we compared the volatile induction by Spodoptera frugiperda (Lepidoptera: Noctuidae), which is particularly well adapted to feed on maize (Zea mays), with the induction by three more generalist noctuid larvae. We tested the hypothesis that S. frugiperda suppresses HIPV emissions in maize, and thereby reduces attractiveness to natural enemies. HIPV emissions triggered by S. frugiperda when feeding on maize were indeed found to be significantly weaker than by Spodoptera littoralis, Spodoptera exigua, and Helicoverpa armigera. The suppression seems specific for maize, as we found no evidence for this when S. frugiperda caterpillars fed on cotton (Gossypium herbaceum). Artificially damaged maize plants treated with larval regurgitant revealed that HIPV suppression may be related to factors in the caterpillars’ oral secretions. We also found evidence that differential phys. damage that the caterpillars inflict on maize leaves may play a role. The suppressed induction of HIPVs had no apparent consequences for the attraction of a common parasitoid of S. frugiperda, Cotesia marginiventris (Hymenoptera: Braconidae). Nevertheless, the ability to manipulate the defenses of its main host plant may have contributed to the success of S. frugiperda as a major pest of maize, especially in Africa and Asia, which it has recently invaded.

Journal of Chemical Ecology published new progress about Corn. 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

Bodachivskyi, Iurii published the artcileUnderstanding the role of the substrate and the metal triflate acidic catalyst in sugar platform biorefineries: A comprehensive systematic approach to catalytic transformations of (poly)carbohydrates in ethanol, COA of Formula: C7H12O3, the main research area is levulinate furfural ethylacetal bronsted Lewis acid catalyst dehydration isomerization; polysaccharide dehydration bronsted acid catalyst preparation monosaccharide glucoside xyloside.

We systematically explore a range of model conversions of mono- and disaccharides, and of linear and branched polysaccharides under the catalytic action of metal trifluoromethanesulfonates (metal triflates) in ethanol. This highlights the preferred reactivity of specific (poly)carbohydrates, and the interplay between selectivities of the reactions and the dominating catalyst activity (Bronsted or Lewis). It unambiguously delineates that selectivities of acid-catalyzed transformations of (poly)carbohydrates into value added platform chems. rely on the origin of the substrate, any (pre)treatment, the acidic catalyst, and the reaction conditions. The optimized catalytic systems enable very efficient conversion of cellulosic carbohydrates into significantly value added Et glucosides (yields up to 63%), Et xylosides (yields up to 69%), Et levulinate (yields up to 75%), Et lactate (yields up to 98%), ethoxyacetaldehyde diethylacetal (yields up to 33%), and furfural diethylacetal (yields up to 44%), depending on the substrate and reaction conditions.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Corn. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, COA of Formula: C7H12O3.

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

Yactayo-Chang, Jessica P. published the artcileZea mays Volatiles that Influence Oviposition and Feeding Behaviors of Spodoptera frugiperda, Application In Synthesis of 140-11-4, the main research area is volatile organic compound zea mays oviposition feeding behavior; Attractant; Maize; Moth; Pest; Plant; Semiochemicals; Terpene.

Fall armyworm (Spodoptera frugiperda) is a major global pest of many crops, including maize (Zea mays). This insect is known to use host plant-derived volatile organic compounds to locate suitable hosts during both its adult and larval stages, yet the function of individual compounds remains mostly enigmatic. In this study, we use a combination of volatile profiling, electrophysiol. assays, pair-wise choice behavioral assays, and chem. supplementation treatments to identify and assess specific compounds from maize that influence S. frugiperda host location. Our findings reveal that Me salicylate and (E)-alpha-bergamotene are oviposition attractants for adult moths but do not impact larval behavior. While geranyl acetate can act as an oviposition attractant or repellent depending on the host volatile context and (E)-4,8-dimethyl-1,3,7-nonatriene (DMNT) is an oviposition deterrent. These compounds can also be attractive to the larvae when applied to specific maize inbreds. These data show that S. frugiperda uses different plant volatile cues for host location in its adult and larval stage and that the background volatile context that specific volatiles are perceived in, alters their impact as behavioral cues.

Journal of Chemical Ecology published new progress about Corn. 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

Zhang, Yuan-Yuan published the artcileDesign, Synthesis, and Biological Activity of Novel Diazabicyclo Derivatives as Safeners, HPLC of Formula: 539-88-8, the main research area is diazabicyclo derivative herbicide safener corn glutathione transferase; N-substituted diazabicyclo; fragment splicing; herbicide safener; intermediate derivatization approach; microwave-assistant synthesis.

Herbicide safeners selectively protect crops from herbicide damage without reducing the herbicidal efficiency on target weed species. The title compounds were designed by intermediate derivatization approach and fragment splicing in order to exploit novel potential safeners. A total of thirty-one novel diazabicyclo derivatives were synthesized by microwave-assistant method using isoxazole-4-carbonyl chloride and diazabicyclo derivatives All synthetic compounds were confirmed by IR, 1H NMR, 13C NMR, HRMS. The bioassay results demonstrated that most of the title compounds could reduce the nicosulfuron phytotoxicity on maize. The glutathione-S-transferase (GST) activity in vivo was assayed and compound 4 (S15) revealed an inspiring safener activity comparable to commercialized safeners isoxadifen-Et and BAS-145138. The mol. docking model exhibited that the competition at the active sites of target enzymes between compound (I) and nicosulfuron was investigated with respect to herbicide detoxification. The current work not only provided a powerful supplement to the intermediate derivatization approach and fragment splicing in design pesticide bioactive mols., but also assisted safener development and optimization.

Journal of Agricultural and Food Chemistry published new progress about Corn. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, HPLC of Formula: 539-88-8.

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

Block, Anna K. published the artcileFighting on two fronts: Elevated insect resistance in flooded maize, Computed Properties of 140-11-4, the main research area is Zea Spodoptera flooding infestation stress metabolite plant defense; Zea mays; fall armyworm; maysin; phenylpropanoid; salicylic acid; submergence; volatiles.

To grow and thrive plants must be able to adapt to both adverse environmental conditions and attack by a variety of pests. Elucidating the sophisticated mechanisms plants have developed to achieve this has been the focus of many studies. What is less well understood is how plants respond when faced with multiple stressors simultaneously. In this study, we assess the response of Zea mays (maize) to the combinatorial stress of flooding and infestation with the insect pest Spodoptera frugiperda (fall armyworm). This combined stress leads to elevated production of the defense hormone salicylic acid, which does not occur in the individual stresses, and the resultant salicylic acid-dependent increase in S. frugiperda resistance. Remodelling of phenylpropanoid pathways also occurs in response to this combinatorial stress leading to increased production of the anti-insect C-glycosyl flavones (maysins) and the herbivore-induced volatile phenolics, benzyl acetate, and phenethyl acetate. Furthermore, changes in cellular redox status also occur, as indicated by reductions in peroxidase and polyphenol oxidase activity. These data suggest that metabolite changes important for flooding tolerance and anti-insect defense may act both additively and synergistically to provide extra protection to the plant.

Plant, Cell & Environment published new progress about Corn. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Computed Properties of 140-11-4.

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

Vilar, Elena Garicano published the artcileEffect of salt reduction and inclusion of 1% edible seaweeds on the chemical, sensory and volatile component profile of reformulated frankfurters, Name: Methyl octanoate, the main research area is seaweed volatile component frankfurter salt reduction; Edible seaweeds; Flavour; Frankfurters; Odor; Sensory analysis; Volatile compounds.

The optimization of processed meats through salt replacement using edible seaweeds may reduce the risk of chronic disease through reduction in dietary sodium. We investigated the impact of the inclusion of four selected seaweeds (1% weight/weight) in reformulated frankfurters in which salt addition and pork fat content was reduced by 50% and 21%, resp., and where pork loin (longissimus dorsi muscle) was increased by 6%, compared to a Control. Two different types of red (Porphyra umbilicalis and Palmaria palmata) and brown (Himanthalia elongata and Undaria pinnatifida) edible seaweeds were evaluated. The reformulated frankfurters containing added seaweed were lower in ash, higher in moisture, protein and darker in color and had altered textural properties in comparison to the Control; mainly less hard and less chewy. The volatile and sensory profiles of the reformulated frankfurters differed from the Control. However, the reformulated frankfurters with the inclusion of H.elongata were the most promising, although further work is required to optimize the formulation.

Meat Science published new progress about Diet. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Name: Methyl octanoate.

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

Siddalinga Swamy, M. S. published the artcileRP-HPLC method for simultaneous estimation of nitazoxanide and ofloxacin in bulk drug and in pharmaceutical formulation, Recommanded Product: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, the main research area is nitazoxanide ofloxacin pharmaceutical formulation reverse phase high; performance liquid chromatog.

A simple, precise, accurate, rapid and reproducible reverse phase high performance liquid chromatog. procedure was developed for simultaneous determination of nitazoxanide and ofloxacin in tablet dosage form was carried on an Inert ODS-3V (250X4.6 nm, 5micro) column using a mobile phase consisting of methanol and buffer (20:80 volume/volume) with a pH3.3 ± at a rate of 1.5 mL/min and the detection was carried out at 230 nm. The linearity was found to be in the range of 5-60μg/mL and 2-24μg/mL Nitazoxanide and Ofloxacin resp. with (r2=0.9990, and r2=0.9994). The peaks obtained were sharp having clear baseline separation with a retention time of 9.093μ 0.03 and 5.946μ 0.03 min for Nitazoxanide and Ofloxacin resp. The results of the anal. were validated statistically and recovery studies confirmed the accuracy of the proposed method.

International Journal of PharmTech Research published new progress about Flow. 55981-09-4 belongs to class esters-buliding-blocks, name is 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, and the molecular formula is C12H9N3O5S, Recommanded Product: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate.

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

Pellevoisin, Christian published the artcileISO 10993-23 In vitro irritation testing for medical devices: Substantiating applicability to mild irritants and non-extractables, COA of Formula: C13H18O3, the main research area is irritation medical device nonextractable; Applicability domain; In vitro; Medical device safety; Mild irritants; Reconstructed human epidermis; Skin irritation.

Irritation testing is an integral part of the biocompatibility assessment of medical devices and has historically been conducted on animals, either by direct contact or with polar and non-polar solvent extracts In 2018 an ISO-sponsored interlaboratory validation study demonstrated that two reconstituted human epidermis (RhE) based assays, which were adapted from validated methods used for industrial chems., produced results essentially equivalent to those obtained with in vivo tests. This led to the publication of the ISO 10993-23:2021 standard on irritation testing, which states that RhE-based assays are now the preferred method. The 2018 validation study evaluated strong irritants, so we tested nine mild irritants (GHS Category 3), neat and spiked at different concentrations into medical device extracts, per ISO 10993-23:2021. The results substantiated the applicability of RhE-based assays for evaluating mild irritants in medical device extracts Moreover, the 2018 validation study tested solid extractable medical device materials but did not consider non-extractable medical device materials (e.g., creams, gels, or sprays). By testing nine marketed non-extractable materials, either neat or spiked with irritants, we also confirmed that RhE-based assays are readily applicable to such medical device materials.

Toxicology In Vitro published new progress about Gels. 6259-76-3 belongs to class esters-buliding-blocks, name is Hexyl 2-hydroxybenzoate, and the molecular formula is C13H18O3, COA of Formula: C13H18O3.

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

Jimenez Saelices, Clara published the artcileSynthesis of latex stabilized by unmodified cellulose nanocrystals: the effect of monomers on particle size, Name: Dodecyl 2-methylacrylate, the main research area is cellulose nanocrystal stabilized polymer latex nanocomposite suspension polymerization property.

Cellulose nanocrystals (CNCs) are sustainable rod-shaped nanoparticles able to adsorb at oil-water interfaces to produce highly stable Pickering emulsions with enhanced mech. properties. Polymerization of the CNC-stabilized monomer droplets is investigated in detail to elucidate the synthesis mechanism of both micro- and nanoparticles of latex in relationship with the initial sizes of the droplets. It is shown in this study that unmodified CNCs, used as a sole stabilizer, are efficient to produce both monomer-in-water Pickering emulsion and nanocomposite latex particles with controlled dimensions. For the initial liquid emulsion of styrene, two populations of droplets were observed: micrometric droplets with diameters that decrease down to 5 μm with increasing CNC concentrations, and nanometric droplets with a diameter distribution ranging from 500 nm to 2 μm for all CNC concentrations It leads to two distinct populations of polystyrene latex particles by polymerization in aqueous dispersed media, i.e. microparticles of 5-18 μm and nanoparticles with an average diameter below 1 μm. The polymerization of various monomers, i.e. styrene, lauryl methacrylate, isobornyl acrylate, Bu methacrylate, and Me methacrylate, in the presence of different initiators indicated that the solubility of the monomer in the aqueous continuous phase is the key parameter to tune the size distribution of the latex particles. Nanocomposite CNC-stabilized waterborne latexes were prepared from polymers with different glass transition temperatures

Polymer Chemistry published new progress about Drops. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Name: Dodecyl 2-methylacrylate.

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