Esters-buliding-blocks

Lai, Yen-Tso published the artcileIsolation and identification of aroma-producing non-Saccharomyces yeast strains and the enological characteristic comparison in wine making, Formula: C11H22O2, the main research area is Saccharomyces cerevisiae yeast aroma wine making.

Microorganisms produce hundreds of aroma-active compounds during fermentation process which affect the flavor of the final wine product. The current study explored the enol. characteristics of non-Saccharomyces yeast strains and their influence on aroma compound complexity during fermentation process. Forty-two yeast strains were isolated from fruits by the DNA sequencing identification. Hanseniaspora uvarum Pi235, Pichia kluyveri Pe114, Saccharomyces cerevisiae Gr112 and Hanseniaspora guilliermondii Ki135 were selected for the following experiments due to the safety considerations and aroma diversity. Biochem. characteristics results showed that H. uvarum Pi235, P. kluyveri Pe114 and S. cerevisiae Gr112 exhibited different consumption preference in maltose, xylose and glycerol assimilation compared with their standard strains. Enol. characteristics results showed that S. cerevisiae Gr112 exhibited best thermal tolerance, ethanol tolerance and β-glucosidase activity. Results of volatile aroma compounds anal. showed that non-Saccharomyces yeast strains were good at producing esters, such as Et acetate and 2-phenethyl acetate which were 11.8-25.4 and 4.1-15.2 folds higher than that from S. cerevisiae Gr112. Non-Saccharomyces yeast strains would provide more divers flavors in wines. The results will increase the applicability of non-Saccharomyces yeasts in the winemaking industry.

LWT–Food Science and Technology published new progress about Biochemical analysis. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Formula: C11H22O2.

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

Giacomin, Wanderson R. Jr. published the artcilePhase Equilibrium Measurements and Thermodynamic Modeling of the Systems (CO2 + Ethyl Levulinate) and (CO2 + Levulinic Acid), Quality Control of 539-88-8, the main research area is phase equilibrium thermodn model system carbon dioxide ethyl levulinate.

This work reports phase equilibrium measurements and thermodn. modeling of the binary systems (CO2 + Et levulinate) and (CO2 + levulinic acid). Each composition was carried out in a high-pressure variable-volume view cell at temperatures ranging from 303.15 to 353.15 K and with CO2 mole fraction ranging from 0.4002 to 0.9751 for the system (CO2 + Et levulinate) and from 0.4083 to 0.9930 for the system (CO2 + levulinic acid). Under these conditions, only vapor-liquid phase transitions were observed The exptl. data were modeled with the Peng-Robinson cubic equation of state with the Boston-Mathias alpha function (PR-BM) and using the van der Waals quadratic mixing rule. The exptl. data of the system (CO2 + Et levulinate) were adequately represented by the thermodn. model with a unique set of binary interaction parameters, which were fitted from all isotherms. Whereas the exptl. data of the system (CO2 + levulinic acid) were only adequately represented with temperature-dependent binary interaction parameters.

Journal of Chemical & Engineering Data published new progress about Binary phase diagram. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Quality Control of 539-88-8.

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

Medeiros, Hugo A. D. published the artcileInfluence of estimated physical constants and vapor pressure for esters in the methanol/ethanol recovery column for biodiesel production, Related Products of esters-buliding-blocks, the main research area is phys constant vapor pressure; ester methanol ethanol recovery column biodiesel production.

The influence of the estimated values of the phys. constants and vapor pressure of esters in a process simulation using the Aspen Hysys was evaluated from the energy parameters of a methanol/ethanol recovery distillation column of a biodiesel production plant. This study was necessary, because in process simulators most of FAMEs and FAEEs are not originally available in the simulator library, due to the lack of exptl. data for these components. Accuracy analyses for the values of reboiler temperature and reboiler heat duty of the simulated column were performed from simulations using different predictive models and exptl. data. Results demonstrated that small deviations of the vapor pressure can generate considerable errors in the reboiler temperature and reboiler heat duty. In addition, errors can be even greater if vapor pressure is estimated from inaccurate critical constants Deviations up to 13% were observed for the reboiler temperature and up to 16% for the reboiler heat duty. Reliable simulations and process design are strongly dependent on the selected phys. properties of the esters, specially vapor pressure, which are generated from available exptl. data and using group contribution and corresponding states models.

Fuel published new progress about Binary phase diagram. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Related Products of esters-buliding-blocks.

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

Fang, Chen published the artcileGradient polarity solvent wash for separation and analysis of electrolyte decomposition products on electrode surfaces, Application In Synthesis of 142-90-5, the main research area is LIB electrode SEI analysis gradient polarity solvent wash.

The solid electrolyte interphase (SEI) formed during the cycling of lithium-ion batteries (LIBs) by decomposition of electrolyte mols. has key impact on device performance. However, the detailed decomposition process and distribution of products remain a mystery due to the wide variety of electrochem. pathways and the lack of facile anal. methods for chem. characterization of SEIs. In this report, a gradient polarity solvent wash technique involving the use of solvents with gradually increased polarities is employed to sequentially remove different SEI components from electrode surfaces. Fourier transform IR (FTIR) spectroscopy is utilized to characterize the SEI composition The impacts of electrolyte additives and discharge rates over SEI formation are illustrated. This study presents a new concept of rationally controlled solvent wash technique for electrode surface anal. that can selectively remove targeted components. The findings in this study provide exptl. support for the slow charge formation processes commonly employed for LIBs in industry.

Journal of the Electrochemical Society published new progress about Battery electrolytes. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Application In Synthesis of 142-90-5.

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

Banerjee, Sanjukta published the artcileOptimization of Chlamydomonas reinhardtii cultivation with simultaneous CO2 sequestration and biofuels production in a biorefinery framework, Category: esters-buliding-blocks, the main research area is carbon dioxide Chlamydomonas biofuel biorefinery; Bioethanol; Biorefinery; CO(2) sequestration; Microalgae: Chlamydomonas reinhardtii; Parameter optimization.

Algal biomass is regarded as a sustainable energy feedstock for the future. Enhancement of the biomass and metabolite production of microalgae increases the economic feasibility of the biofuel production process. The present study encompasses on bioethanol production from Chlamydomonas reinhardtii through a biorefinery approach. The biomass and carbohydrate productivity of C. reinhardtii UTEX 90 and CC 2656 were enhanced by optimizing the physico-chem. parameters. The following conditions were found suitable for the improvement of biomass and metabolite content of C. reinhardtii: pH 6.5-7.0, incubation temperature 30°C, initial acetate and ammonium chloride concentration of 1.56 g L-1 and 100-200 mg L-1, resp. Under the optimized operational condition biomass and carbohydrate productivity of C. reinhardtii UTEX 90 and CC 2656 were 512 mg L-1 d-1 & 266.24 mg L-1 d-1 and 364 mg L-1 d -1 & 163.80 mg L-1 d-1, resp. The amount of CO2 sequestered during the cultivation process by UTEX 90 and CC 2656 were 113 mg L-1 d-1 and 74.95 mg L-1 d-1, resp. The depigmented and defatted carbohydrate rich biomass was considered as raw material for bioethanol production The bioethanol yield range was 90-94% of the theor. yield using Saccharomyces cerevisiae INVSC-1 in a double jacket reactor. To improve the viability of the process, the spent media after ethanol fermentation was subsequently used for methane production using mixed microbial consortium. The energy recovery from the process was 40.39% and 39.7% for UTEX 90 and CC 2656, resp. when C. reinhardtii biomass was used as substrate for biofuel production The present investigation concedes with the potentiality of algae as a favorable 3rd generation feedstock to address the existing challenges of clean energy production with concomitant CO2 sequestration.

Science of the Total Environment published new progress about Autotrophic bacteria. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Category: esters-buliding-blocks.

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

Qian, Yichun published the artcileCompletion of the cytosolic post-chorismate phenylalanine biosynthetic pathway in plants, Category: esters-buliding-blocks, the main research area is Petunia Arabidopsis cytosol chorismate mutase phenylalanine phenylpyruvate biosynthesis.

In addition to being a vital component of proteins, phenylalanine is also a precursor of numerous aromatic primary and secondary metabolites with broad physiol. functions. In plants phenylalanine is synthesized predominantly via the arogenate pathway in plastids. Here, we describe the structure, mol. players and subcellular localization of a microbial-like phenylpyruvate pathway for phenylalanine biosynthesis in plants. Using a reverse genetic approach and metabolic flux anal., we provide evidence that the cytosolic chorismate mutase is responsible for directing carbon flux towards cytosolic phenylalanine production via the phenylpyruvate pathway. We also show that an alternative transcription start site of a known plastidial enzyme produces a functional cytosolic prephenate dehydratase that catalyzes the conversion of prephenate to phenylpyruvate, the intermediate step between chorismate mutase and phenylpyruvate aminotransferase. Thus, our results complete elucidation of phenylalanine biosynthesis via phenylpyruvate in plants, showing that this pathway splits from the known plastidial arogenate pathway at chorismate, instead of prephenate as previously thought, and the complete pathway is localized in the cytosol.

Nature Communications published new progress about Arabidopsis thaliana. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Category: esters-buliding-blocks.

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

Zhang, P. published the artcileUltraviolet-B radiation induces cell death in root tips and reprograms metabolism in Arabidopsis, Name: 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, the main research area is Arabidopsis root growth metabolism cell death ultravioletB radiation.

UV-B (UV-B) radiation inhibits root system growth, however, the influence of UV-B radiation on the regulation of root development remains unclear. Here, we investigated the effects of UV-B radiation on root growth and metabolism in Arabidopsis using physiol., pharmacol., and transcriptome approaches. Our previous study has demonstrated that UV-B radiation depresses auxin accumulation in roots by reducing auxin biosynthesis, transport, and response. In this study, we found that UV-B radiation inhibited primary root (PR) growth by inducing root tip cell death and thereby disrupting cell division and elongation in root tips. The destructed root structure and distorted auxin flow caused by UV-B-induced root tip cell death also led to a reduced auxin accumulation in roots. Supplementation with an auxin α-naphthylacetic acid alleviated UV-B-repressed PR growth and further supported a notion that auxin is involved in UV-Brepressed PR growth. The UV-B radiation downregulated the expression of genes encoding the enzymes or regulators of the biosynthesis and degradations of the structural constituents of cell wall and genes involved in wax, cutin, and suberin biosynthesis, thereby repressing root system growth and development. The UV-B radiation also markedly repressed photosynthesis-related gene expression in roots, a non-photosynthetic organ. Taken together, this study suggests that UV-B radiation affects root growth by inducing cell death in root tips and reprogramming metabolism in roots.

Biologia Plantarum published new progress about Arabidopsis thaliana. 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, Name: 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate.

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

Wang, Hua-Ying published the artcileOptimization of SPME-GC-MS and characterization of floral scents from Aquilegia japonica and A. amurensis flowers, Application In Synthesis of 111-11-5, the main research area is Aquilegia Asterias SPME GC MS VOC; Columbines; GC–MS; Northeast China; SPME; VOCs.

The floral scents of plants play a key role in plant reproduction through the communication between plants and pollinators. Aquilegia as a model species for studying evolution, however, there have been few studies on the floral scents and relationships between floral scents and pollination for Aquilegia taxa. In this study, three types of solid-phase micro-extraction (SPME) fiber coatings (DVB/PDMS, CAR/PDMS, DVB/CAR/PDMS) were evaluated for their performance in extracting volatile organic compounds (VOCs) from flowers of Aquilegia amurensis, which can contribute to the future studies of elucidating the role of floral scents in the pollination process. In total, 55 VOCs were identified, and among them, 50, 47 and 45 VOCs were extracted by the DVB/CAR/PDMS fiber, CAR/PDMS fiber and DVB/PDMS fibers, resp. Only 30 VOCs were detected in A. japonica taxa. Furthermore, the relative contents of 8 VOCs were significant different (VIP > 1 and p < 0.05) between the A. amurensis and A. japonica. The results can be applied in new studies of the relationships between the chem. composition of floral scents and the processes of attraction of pollinator. It may provide new ideas for rapid evolution and frequent interspecific hybridization of Aquilegia. BMC Chemistry published new progress about Aquilegia flabellata. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Application In Synthesis of 111-11-5.

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

Wang, Hua-Ying published the artcileOptimization of SPME-GC-MS and characterization of floral scents from Aquilegia japonica and A. amurensis flowers, Application of Methyl decanoate, the main research area is Aquilegia Asterias SPME GC MS VOC; Columbines; GC–MS; Northeast China; SPME; VOCs.

The floral scents of plants play a key role in plant reproduction through the communication between plants and pollinators. Aquilegia as a model species for studying evolution, however, there have been few studies on the floral scents and relationships between floral scents and pollination for Aquilegia taxa. In this study, three types of solid-phase micro-extraction (SPME) fiber coatings (DVB/PDMS, CAR/PDMS, DVB/CAR/PDMS) were evaluated for their performance in extracting volatile organic compounds (VOCs) from flowers of Aquilegia amurensis, which can contribute to the future studies of elucidating the role of floral scents in the pollination process. In total, 55 VOCs were identified, and among them, 50, 47 and 45 VOCs were extracted by the DVB/CAR/PDMS fiber, CAR/PDMS fiber and DVB/PDMS fibers, resp. Only 30 VOCs were detected in A. japonica taxa. Furthermore, the relative contents of 8 VOCs were significant different (VIP > 1 and p < 0.05) between the A. amurensis and A. japonica. The results can be applied in new studies of the relationships between the chem. composition of floral scents and the processes of attraction of pollinator. It may provide new ideas for rapid evolution and frequent interspecific hybridization of Aquilegia. BMC Chemistry published new progress about Aquilegia flabellata. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Application of Methyl decanoate.

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

Omolabi, Kehinde F. published the artcileA probable means to an end: exploring P131 pharmacophoric scaffold to identify potential inhibitors of Cryptosporidium parvum inosine monophosphate dehydrogenase, Name: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, the main research area is P131 anticryptosporidial antimicrobial IMPDH inhibitor pharmacokinetic cryptosporidiosis Cryptosporidium; ADMET; Cryptosporidium parvum IMPDH; MM/PBSA; P131; Per-residue energy decomposition; Virtual screening.

Compound P131 has been established to inhibit Cryptosporidium parvum′s inosine monophosphate dehydrogenase (CpIMPDH). Its inhibitory activity supersedes that of paromomycin, which is extensively used in treating cryptosporidiosis. Through the per-residue energy decomposition approach, crucial moieties of P131 were identified and subsequently adopted to create a pharmacophore model for virtual screening in the ZINC database. This search generated eight ADMET-compliant hits that were examined thoroughly to fit into the active site of CpIMPDH via mol. docking. Three compounds ZINC46542062, ZINC58646829, and ZINC89780094, with favorable docking scores of – 8.3 kcal/mol, – 8.2 kcal/mol, and – 7.5 kcal/mol, were selected. The potential inhibitory mechanism of these compounds was probed using mol. dynamics simulation and Mol. Mechanics Generalized Poisson Boltzmann Surface Area (MM/PBSA) analyses. Results revealed that one of the hits (ZINC46542062) exhibited a lower binding free energy of – 39.52 kcal/mol than P131, which had – 34.6 kcal/mol. Conformational perturbation induced by the binding of the identified hits to CpIMPDH was similar to P131, suggesting a similarity in inhibitory mechanisms. Also, in silico investigation of the properties of the hit compounds implied superior physicochem. properties with regards to their synthetic accessibility, lipophilicity, and number of hydrogen bond donors and acceptors in comparison with P131. ZINC46542062 was identified as a promising hit compound with the highest binding affinity to the target protein and favorable physicochem. and pharmacokinetic properties relative to P131. The identified compounds can serve as a basis for conducting further exptl. investigations toward the development of anticryptosporidials, which can overcome the challenges of existing therapeutic options. Graphical abstractP131 and the identified compounds docked in the NAD+ binding site of Cryptosporidium parvum IMPDH .

Journal of Molecular Modeling published new progress about Antimicrobial agents. 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, Name: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate.

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