Tag: M.W=100-150

Ichikawa, Eri published the artcileEffect of koji starter on metabolites in Japanese alcoholic beverage sake made from the sake rice Koshitanrei, Synthetic Route of 5405-41-4, the main research area is metabolite koji starter alc beverage sake rice Koshitanrei; Koshitanrei ; koji starter; metabolite; metabolome analysis; sake.

In sake brewing, the steamed rice is used in 2 ways, added to sake-mash and making rice-koji. Rice-koji is made from the steamed rice by using koji starter, and its quality is an important determinant of the aroma/taste of sake. The sake rice Koshitanrei (KOS) was developed in Niigata Prefecture by crossing 2 sake rice varieties, Gohyakumangoku and Yamadanishiki. Recently, we reported the characteristic components/metabolites in sake made from KOS by conducting metabolome anal. using UPLC-QTOF-MS. In this study, to investigate the effect of koji starter and sake rice cultivars on the sake metabolites, we performed small-scale sake-making tests using the above 3 rice cultivars and 3 koji starters. Finally, we demonstrated that some of the characteristic components/metabolites of sake from KOS are affected by the koji starter. Thus, in addition to rice cultivar, koji starter plays an important role for establishment/maintenance of the quality of the final product.

Bioscience, Biotechnology, and Biochemistry published new progress about Beverages. 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

Guimaraes, Jonas T. published the artcileEffect of high-intensity ultrasound on the nutritional profile and volatile compounds of a prebiotic soursop whey beverage, Recommanded Product: Ethyl 3-hydroxybutanoate, the main research area is prebiotics soursop whey beverage nutritional profile; volatile compound high intensity ultrasound; Anti-hypertensive activity; Bioactive compounds; Emerging technology; Functional food; Non-thermal processing.

This study evaluated the nutritional profile and volatile compounds present in a novel prebiotic (inulin) soursop whey beverage, due to the effects of high-intensity ultrasound (HIUS). The prebiotic soursop whey beverage was produced and processed by non-thermal high-intensity ultrasound varying the power (0, 200, 400 and 600 W) and by high-temperature short time (72 °C for 15 s) thermal treatment. Total acidity, pH, ascorbic acid content, total phenolics compounds content, antioxidant activity, hypertensive activity, fatty acid profile, volatile organic compounds, macro and micro minerals, as well as the heavy metals in these products, were analyzed. Overall, the HIUS technol. induced some pos. changes in the nutritional profile of the soursop whey beverage including beneficial effects, e.g., increase of phenolic content, improvement of the antioxidant and anti-hypertensive activity and reduction of undesired minerals. Although some neg. changes, such as degradation of the ascorbic acid, decrease of some minerals and production of certain volatile compounds were found, the beneficial effects were prominent, thus, opening new opportunities to develop healthy functional beverages.

Ultrasonics Sonochemistry published new progress about Beverages. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Recommanded Product: Ethyl 3-hydroxybutanoate.

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

Galanopoulos, Christos published the artcileAn integrated methodology for the economic and environmental assessment of a biorefinery supply chain, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is ethano ethyl levulinate electricity environmental assessment optimization simulation.

A supply chain network MILP model, developed by means of AIMMS software, and a process plant simulation model, developed by means of Aspen Plus, are combined for the optimization of a biorefinery network. Optimization of the supply chain network is initially addressed using literature process and economic data. The results are used as input in the Aspen Plus model where the tech. and economic performance of the biorefineries is calculated rigorously. The two computational tools are iteratively executed until convergence on number, locations and size of the biorefineries and on process yield to products and total costs is achieved. The final results are used to perform the Economic Value and Environmental Impact (EVEI) anal. of the overall biorefinery network. The methodol. is applied to a case study concerning the deployment of cereal straw in Germany to produce ethanol, Et levulinate and electricity. Optimization results reveal that the wheat straw supply network with four biorefineries is economically feasible and determines an environmental margin in terms of equivalent emissions savings of about 4 Mt of CO2 per yr.

Chemical Engineering Research and Design published new progress about Algorithm. 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

Velazquez, Rocio published the artcileUsing Torulaspora delbrueckii killer yeasts in the elaboration of base wine and traditional sparkling wine, HPLC of Formula: 5405-41-4, the main research area is Torulaspora Saccharomyces polysaccharide protein aroma fermentation sparkling wine; 3‑Ethoxy‑1‑propanol (PubChem CID: 8109); 4‑Vinylguaiacol (PubChem CID: 332); Aroma; Butanoic acid (PubChem CID: 264); Ethyl hexanoate (PubChem CID: 31265); Ethyl octanoate (PubChem CID: 7799); Ethyl propanoate (PubChem CID: 7749); Foam; Isobutyric acid (PubChem CID: 6590); Mannan; Polysaccharide; Second fermentation; Yeast death.

For still wines, killer strains of Torulaspora delbrueckii can be used instead of non-killer strains to improve this species’ domination during must fermentation, with an ensured, reliable impact on the final wine quality. The present work analyzed the usefulness of these killer yeasts for sparkling-wine making. After the first fermentation, the foaming capacity of T. delbrueckii base wines was very low compared to Saccharomyces cerevisiae base wines. Significant pos. correlations of foaming parameters were found with the amounts of C4-C16 Et esters and proteins, and neg. with some anti-foaming alcs. produced by each yeast species. There were, however, no evident pos. effects of polysaccharides on those parameters. The organoleptic quality of the T. delbrueckii base wines was judged inappropriate for sparkling-wine making, so that the following second-fermentation experiments only used a single assemblage of S. cerevisiae base-wines. While second fermentation was completed with inoculation of S. cerevisiae (both alone and mixed with T. delbrueckii) to yield dry sparkling wines with high CO2 pressure, single inoculation with T. delbrueckii did not complete this fermentation, leaving sweet wines with poor CO2 pressure. Yeast death due to CO2 pressure was much greater in T. delbrueckii than in S. cerevisiae, making any killer effect of S. cerevisiae over T. delbrueckii irrelevant because no autolyzed cells were found during the first days of mixed-inoculated second fermentation Nonetheless, the organoleptic quality of the mixed-inoculated sparkling wines was better than that of wines single-inoculated with S. cerevisiae, and showed no deterioration in foam quality. This seemed mainly to be because T. delbrueckii increased the amounts of Et propanoate and some acids (e.g., isobutyric and butanoic), alcs. (e.g., 3-ethoxy-1-propanol), and phenols (e.g., 4-vinylguaiacol). For these sparkling wines, no significant correlations between foaming parameters and aroma compounds were found, probably because the differences in foaming parameter values among these wines were fairly small. This is unlike the case for the base wines for which there were large differences in these parameters, which facilitated the anal. of the influence of aroma compounds on base-wine foamability.

International Journal of Food Microbiology published new progress about Food foams. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, HPLC of Formula: 5405-41-4.

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

Yun, Wan-Chu published the artcileWater-born zirconium-based metal organic frameworks as green and effective catalysts for catalytic transfer hydrogenation of levulinic acid to γ-valerolactone: Critical roles of modulators, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is zirconium MOF levulinic acid valerolactone transfer hydrogenation catalyst; Levulinic acid; MOF-801; Modulators; Zr fumarate; γ-valerolactone.

While zirconium (Zr)-based metal organic frameworks (MOFs) are promising for conversion of levulinic acid (LA) to γ-valerolactone (GVL) through catalytic transform hydrogenation (CTH), these reported Zr MOFs for LA conversion must be synthesized in toxic DMF (DMF). From the viewpoint of sustainability, it is preferable to avoid usage of DMF-based solvents to prepare these Zr MOFs. As water is a green solvent, the aim of this study is to develop and investigate Zr MOFs, which are prepared in water, for LA conversion to GVL. Specifically, monocarboxylic acids (e.g., formic acid, acetic acid and propanoic acid) are employed as modulators during the preparation of water-born ZrF. The role of modulators is extremely important for the well-developed formation of water-born ZrF. In addition, different monocarboxylic acid modulators also significantly influence the morphol. of water-born ZrF; nevertheless, their crystalline structures and acidities are equivalent As for LA conversion, these water-born modulated ZrF MOFs are validated to successfully convert LA to GVL. Especially, the formic acid-modulated ZrF can exhibit LA conversion = 96%, selectivity for GVL = 98% and yield of GVL = 98%. These water-born modulated ZrF also exhibit even higher catalytic activities than the typical DMF-based ZrF and reported Zr-based MOFs in LA conversion to GVL. These water-born ZrF could be also reused even without regeneration for multiple cyclic LA conversion. These results and findings prove that the water-born ZrF is not only environmentally benign but also more effective for LA conversion to GVL.

Journal of Colloid and Interface Science published new progress about IR spectra. 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

Takemoto, Kohei published the artcileSite-selective esterifications of polyol β-hydroxyamides and applications to serine-selective glycopeptide modifications, Related Products of esters-buliding-blocks, the main research area is glycopeptide synthesis serine sugar steric hindrance; hydroxyamide polyol esterification hydroxyl group acylation.

The site-selective acylations of β-hydroxyamides in the presence of other hydroxyl groups are described. Central to the success of this modification is the metal-template-driven acylation using pyridine ketoxime esters as acylating reagents in combination with CuOTf. This strategy enables β-hydroxyl groups to be site-selectively acylated in various derivatives, including sterically hindered secondary β-alc. The utility of this methodol. is showcased by the serine-selective modification of a glycopeptide with unprotected sugar.

Organic Letters published new progress about Acylation. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Related Products of esters-buliding-blocks.

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

Maneechakr, Panya published the artcileSelective conversion of fructose into 5-ethoxymethylfurfural over green catalyst, Product Details of C7H12O3, the main research area is fructose ethoxymethylfurfural green catalyst.

In this study, selective formation of 5-ethoxymethylfurfural (EMF) from one-pot conversion of fructose in a co-solvent of ethanol with THF over green SO3H-CD carbon was investigated for the first time using an ultrasonic system. The maximum EMF yield of 74% with 100% fructose conversion was achieved in mild conditions. Moreover, the better selectivity and the longer recyclability (eight cycles) for EMF production via particular reactions such as fructose dehydration and etherification were obviously found while the formation of 5-hydroxymethylfurfual, Et levulinate or humins was inhibited using SO3H-CD carbon, comparing to com. catalysts such as Amberlyst-35, SiO2-Tosic acid and Al2O3.

Research on Chemical Intermediates published new progress about Cosolvents. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Product Details of C7H12O3.

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

Brouwer, Thomas published the artcileBiobased entrainer screening for extractive distillation of acetone and diisopropyl ether, Quality Control of 539-88-8, the main research area is biobased entrainer screening extractive distillation acetone diisopropyl ether volatility.

This work focuses on the assessment of biobased solvents for the industrial separation of acetone and diisopropyl ether employing extractive distillation From the exptl. screening of 35 (biobased) solvents at 1000 mbar, 84/16 mol ratio acetone/ diisopropyl ether, and a solvent to feed ratio of 1 (mass based) it was observed that DL-limonene entrained diisopropyl ether, resulting in an acetone relative volatility of 1.44. This is a consequence of the selective repulsion of the low-boiling and more polar acetone by DL-limonene. More extensive vapor-liquid equilibrium (VLE) anal. over the entire acetone-diisopropyl ether (pseudo-)binary composition range showed that DL-limonene was the only biobased solvent able to break the azeotrope. The exptl. investigated VLE data of this ternary system was successfully correlated with the NRTL and UNIQUAC models. The other solvents that appeared most interesting in the initial screening were water and ethylene carbonate, entraining acetone with the highest observed diispropyl ether relative volatilities of 2.71 and 11.6. Although the high induced relative volatility for the 84/16 mol ratio acetone/ diisopropyl ether appeared interesting, over the entire composition range this resulted however in a shift in location of the azeotrope rather than removing the azeotrope. Therefore, it was concluded that DL-limonene is for this system the best performing biobased entrainer of the screening study. The observations are in agreement with observations from literature on similar systems, where oxygenated polar solvents were seen to have more affinity towards the ketone than towards the ether, while apolar solvents induce a higher volatility of the ketones.

Separation and Purification Technology published new progress about Azeotropes. 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

Subbotina, Elena published the artcileZeolite-Assisted Lignin-First Fractionation of Lignocellulose: Overcoming Lignin Recondensation through Shape-Selective Catalysis, Computed Properties of 539-88-8, the main research area is zeolite catalyst lignin fractionation lignocellulose wood hemicellulose; biomass; depolymerization; heterogeneous catalysis; lignin; zeolites.

Organosolv pulping releases reactive monomers from both lignin and hemicellulose by the cleavage of weak C-O bonds. These monomers recombine to form undesired polymers through the formation of recalcitrant C-C bonds. Different strategies were developed to prevent this process by stabilizing the reactive monomers (i.e., lignin-first approaches). To date, all reported approaches rely on the addition of capping agents or metal-catalyzed stabilization reactions, which usually require high pressures of hydrogen gas. Herein, a metal- and additive-free approach is reported that uses zeolites as acid catalysts to convert the reactive monomers into more stable derivatives under organosolv pulping conditions. Experiments with model lignin compounds showed that the recondensation of aldehydes and allylic alcs. produced by the cleavage of β-O-4′ bonds was efficiently inhibited by the use of protonic β zeolite. By applying a zeolite with a preferred pore size, the bimol. reactions of reactive monomers were effectively inhibited, resulting in stable and valuable monophenolics. The developed methodol. was further extended to birch wood to yield monophenolic compounds and value-added products from carbohydrates.

ChemSusChem published new progress about Birch wood. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Computed Properties of 539-88-8.

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

Gao, Xiaoqing published the artcileRu/CeO2 catalyst with optimized CeO2 morphology and surface facet for efficient hydrogenation of ethyl levulinate to γ-valerolactone, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is ruthenium ceria catalyst surface facet ethyl levulinate hydrogenation valerolactone.

Three Ru/CeO2 catalysts with different CeO2 morphol. (nanorod, nanocube and nano-octahedra) mainly exposed (1 1 0) + (1 0 0), (1 0 0) and (1 1 1) facets for hydrogenation of biomass-derived Et levulinate (EL) to valuable γ-valerolactone (GVL). Ru/CeO2-rod with exposed (1 1 0) crystal plane obtained the highest GVL yield (99.4%) and best productivity (13140 h-1). The surface facets of CeO2 supports not only affect the chem. states of Ru species but also tune the concentration of oxygen vacancy in Ru-CeO2 interface. The concentration of oxygen vacancy shows a linear relationship with GVL production rate. DFT calculations indicate that the lactonization of CH3CHOCH2CH2CO* to produce GVL is the rate-determining step in EL hydrogenation, and Ru10/CeO2 (1 1 0) with more oxygen vacancy has low activation energy barrier, compared to Ru10/CeO2 (1 0 0) and Ru10/CeO2 (1 1 1).

Journal of Catalysis published new progress about Adsorption. 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