Tag: M.W=150-200

Zhao, Guanjia published the artcileThermophysical properties of fatty acid methyl and ethyl esters, Recommanded Product: Methyl octanoate, the main research area is fatty acid methyl ethyl ester thermophys property.

In present study, surface light scattering (SLS) was used for the simultaneous determination of liquid surface tension and kinematic viscosity of twelve fatty acid esters, including six Me esters (FAMEs) and six Et esters (FAEEs). The SLS apparatus was firstly checked with a reference fluid n-dodecane, and a good agreement of our data from SLS with those from literatures could be found. By utilizing this apparatus, both properties were investigated in the temperature ranges between (298 and 448) K for all substances with an exception of Me myristate and Et myristate covering the temperatures between (323 and 448) K due to their high m.ps. Addnl., the liquid d. and refractive index were determined by an Anton Paar U-tube densimeter between (293 and 453) K and a refractometer from (278 to 358) K, resp. The surface tension and viscosity data obtained from the SLS experiment were fitted to the van der Waals type and the reciprocal temperature-dependent polynomial equations, resp. The quadric and linear functions were adopted to correlate the d. and refractive index data, resp. This work improves the data situation for these fatty acid esters especially at elevated temperatures and provides necessary data and models for the crucial thermophys. properties in connection with the design and optimization of the injection system of an internal combustion engine (ICE).

Journal of Chemical Thermodynamics published new progress about Density. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Recommanded Product: Methyl octanoate.

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

Zhao, Guanjia published the artcileThermophysical properties of fatty acid methyl and ethyl esters, Product Details of C11H22O2, the main research area is fatty acid methyl ethyl ester thermophys property.

In present study, surface light scattering (SLS) was used for the simultaneous determination of liquid surface tension and kinematic viscosity of twelve fatty acid esters, including six Me esters (FAMEs) and six Et esters (FAEEs). The SLS apparatus was firstly checked with a reference fluid n-dodecane, and a good agreement of our data from SLS with those from literatures could be found. By utilizing this apparatus, both properties were investigated in the temperature ranges between (298 and 448) K for all substances with an exception of Me myristate and Et myristate covering the temperatures between (323 and 448) K due to their high m.ps. Addnl., the liquid d. and refractive index were determined by an Anton Paar U-tube densimeter between (293 and 453) K and a refractometer from (278 to 358) K, resp. The surface tension and viscosity data obtained from the SLS experiment were fitted to the van der Waals type and the reciprocal temperature-dependent polynomial equations, resp. The quadric and linear functions were adopted to correlate the d. and refractive index data, resp. This work improves the data situation for these fatty acid esters especially at elevated temperatures and provides necessary data and models for the crucial thermophys. properties in connection with the design and optimization of the injection system of an internal combustion engine (ICE).

Journal of Chemical Thermodynamics published new progress about Density. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Product Details of C11H22O2.

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

Wang, Xiaojie published the artcileVolumetric properties of n-hexadecane/ethyl octanoate mixtures from 293.15 K to 363.15 K and pressures up to 60 MPa, Synthetic Route of 106-32-1, the main research area is ethyl octanoate hexadecane density vapor pressure.

The densities of pure Et octanoate and n-hexadecane/ethyl octanoate mixtures were measured from 293.15 K to 363.15 K and up to 60 MPa using U-shape vibrating-tube densimeter. The results were correlated as Tait equation, the excess molar volumes, isothermal compressibilities, and isobaric thermal expansivities of the mixtures were calculated and analyzed. In addition, the parameters in the PC-SAFT equation for Et octanoate were obtained based on the high-pressure densities obtained in this work and the vapor pressure in the literatures. The densities of the mixtures were predicted by PC-SAFT equation, the absolute average deviations between the exptl. results and those calculated were less than 0.52%.

Journal of Chemical Thermodynamics published new progress about Density. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Synthetic Route of 106-32-1.

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

Xue, Sa published the artcileGeneral models for prediction densities and viscosities of saturated and unsaturated fatty acid esters, Application of Ethyl nonanoate, the main research area is saturated unsaturated fatty acid ester prediction density.

Biodiesel is a very promising renewable energy, whose properties are determined by fatty acid esters in it. The work aims to develop prediction models based on their mol. structure to estimate the d. and viscosity of saturated and unsaturated fatty acid esters in a wide range of temperature and pressure. Densities and viscosities of Et hexanoate and Et nonanoate were measured from 313.15 K to 363.15 K and at pressures up to 15 MPa to get more exptl. data. The effect of temperature, pressure and mol. structure on d. and viscosity based on the exptl. data in this work and collected from literature found an interesting phenomenon that densities decrease with the increasing carbon atoms number in the chain of the saturated fatty acid esters at low temperature, but there is an opposite trend at high temperature Two models derived from the Tait equation were proposed for densities with the average absolute relative deviation of 0.15% for saturated fatty acid Me esters (FAMEs), 0.13% for saturates fatty acid Et esters (FAEEs), 0.17% for unsaturated FAMEs, 0.06% for unsaturated FAEEs, resp. For viscosity, two models based on the Andrade-Tait model were proposed with the average absolute relative deviation of 1.49% for saturated FAMEs, 0.92% for saturated FAEEs, 4.54% for unsaturated FAMEs and 2.15% for unsaturated FAEEs, resp.

Journal of Molecular Liquids published new progress about Density. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Application of Ethyl nonanoate.

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

Wang, Xiaojie published the artcileLiquid viscosities of ethyl caprylate and ethyl caprate at elevated temperatures and pressures, Safety of Ethyl octanoate, the main research area is ethyl caprylate caprate viscosity temperature pressure.

In this work, the high-pressure liquid viscosities of Et caprylate and Et caprate were measured at the temperatures from 303 K to 362 K and pressures up to 30 MPa. The measurements were carried out based the falling-cylinder viscosity measurement system which was established in our laboratory The combined expanded relative uncertainty of the present measurement was <0.03 with a confidence level of 0.95. The high-pressure viscosity values were correlated with Andrade-Tait equation. The average relative deviation between exptl. data and calculated results from Andrade-Tait equation for Et caprylate and Et caprate was 0.38% and 0.73%, resp. The maximum relative deviation was 1.32% and 1.96%, resp. Journal of Molecular Liquids published new progress about Density. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Safety of Ethyl octanoate.

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

Wang, Xiaojie published the artcileLiquid viscosities for methyl hexanoate, methyl heptanoate, methyl caprylate, and methyl nonanoate at high pressures, Formula: C9H18O2, the main research area is methyl hexanoate heptanoate caprylate nonanoate liquid viscosity.

The exptl. measurements for liquid viscosities of four fatty acid Me esters, including Me hexanoate, Me heptanoate, Me caprylate, and Me nonanoate, were carried out with a falling-cylinder viscometer. For the present measurement, the temperature ranges were from 292 K to 362 K and the pressure was reached to 30 MPa. The combined expanded relative uncertainty of the viscosity measurements was within 0.03 with 0.95 confidence level. The viscosity data for each studied esters were correlated by Andrade-Tait equation, and the average absolute relative deviation between the exptl. data and calculated values is 0.31%, 0.44%, 0.38%, and 0.25% for Me hexanoate, Me heptanoate, Me caprylate, and Me nonanoate, resp. The maximum absolute relative deviation is 1.09%, 1.28%, 1.28%, and 0.75%.

Journal of Chemical Thermodynamics published new progress about Density. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Formula: C9H18O2.

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

Yadav, Priyanka published the artcileHydrothermal liquefaction of Fe-impregnated water hyacinth for generation of liquid bio-fuels and nano Fe carbon hybrids, Application of Methyl decanoate, the main research area is iron carbon hybrid liquid bio fuel hydrothermal liquefaction; Bio-oil; Fe carbon hybrids; Hydrothermal liquefaction; Light and heavy oil; Water hyacinth.

In this work, hydrothermal liquefaction experiments of iron impregnated water hyacinth were performed with a motive to enhance bio-oil yields along with generation of nanometal carbon hybrids. Iron nanoparticles were impregnated and its metal loading was determined by ICP-MS. The impact of operating parameters like temperature, biomass to water ratio and reaction time on bio-oil yields was studied. During hydrothermal liquefaction a maximum total bio-oil yield of 38.1% was obtained at 280°C along with formation of nanometal carbon hybrids. The light oil and heavy oil fractions were characterized by GCMS and NMR for determining the key components. The light oil mainly comprises of alkanes, alcs. and esters whereas heavy oil contains esters, ethers, carboxylic acids and phenols. XRD and XPS of Fe-impregnated water hyacinth and residues confirmed the transition of Fe+3/+2 to Fe0. TEM anal. resulted an average particle size of Fe nanoparticles around 19.6 nm.

Bioresource Technology published new progress about Biomass. 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

Schwarz, Luisa Vivian published the artcileSelection of low nitrogen demand yeast strains and their impact on the physicochemical and volatile composition of mead, Product Details of C11H22O2, the main research area is mead physicochem volatile composition nitrogen demand yeast strain; Honey; Mead; Nitrogen demand; Volatile compounds; Yeast.

Mead is an ancient alc. beverage produced through the fermentation of a diluted solution of honey. Due to the peculiar and varied composition of honey, mead production faces several problems, such as slow or stuck fermentations mainly due to the low nitrogen concentration, lack of uniformity of the final product and the production of unpleasant aromas. In this context, this work aimed to select low nitrogen-demand yeast strains and evaluate their potential for the production of mead. Therefore, among 21 com. wine yeast strains, 5 were selected based on their fermentative behavior at low assimilable nitrogen concentrations The selected strains were further evaluated for their contributions in meads produced with limited nitrogen availability, and the results showed significant differences on some physicochem. parameters like biomass production, residual sugars, glycerol concentration, and fermentative rate. Moreover, meads obtained with selected strains differed in the concentration of several volatile compounds The volatile compounds concentration and the principal component anal. based on odor activity values allowed separating strains into three groups. In general, S. cerevisiae var bayanus strains (QA23, Spark, and AWRI-R2) were the largest producers of aromatic compounds, particularly those with floral and fruity descriptors. The selection of yeast strains with low nitrogen-demand and different volatile compounds production can be explored by mead makers to limit fermentation problems and obtain characteristic products.

Journal of Food Science and Technology (New Delhi, India) published new progress about Biomass. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Product Details of C11H22O2.

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

Abe, Takayuki published the artcileCharacterization of a new Saccharomyces cerevisiae isolated from hibiscus flower and its mutant with L-leucine accumulation for awamori brewing, Name: Ethyl octanoate, the main research area is Saccharomyces hibiscus flower leucine awamori brewing; Saccharomyces cerevisiae; awamori; breeding; comparative genomics; hibiscus yeast; liquor flavors.

Since flavors of alc. beverages produced in fermentation process are affected mainly by yeast metabolism, the isolation and breeding of yeasts have contributed to the alc. beverage industry. To produce awamori, a traditional spirit (distilled alc. beverage) with unique flavors made from steamed rice in Okinawa, Japan, it is necessary to optimize yeast strains for a diversity of tastes and flavors with established qualities. Two categories of flavors are characteristic of awamori; initial scented fruity flavors and sweet flavors that arise with aging. Here we isolated a novel strain of Saccharomyces cerevisiae from hibiscus flowers in Okinawa, HC02-5-2, that produces high levels of alc. The whole-genome information revealed that strain HC02-5-2 is contiguous to wine yeast strains in a phylogenic tree. This strain also exhibited a high productivity of 4-vinyl guaiacol (4-VG), which is a precursor of vanillin known as a key flavor of aged awamori. Although conventional awamori yeast strain 101-18, which possesses the FDC1 pseudogene does not produce 4-VG, strain HC02-5-2, which has the intact PAD1 and FDC1 genes, has an advantage for use in a novel kind of awamori. To increase the contents of initial scented fruity flavors, such as isoamyl alc. and isoamyl acetate, we attempted to breed strain HC02-5-2 targeting the L-leucine synthetic pathway by conventional mutagenesis. In mutant strain T25 with Lleucine accumulation, we found a hetero allelic mutation in the LEU4 gene encoding the Gly516Ser variant a-isopropylmalate synthase (IPMS). IPMS activity of the Gly516Ser variant was less sensitive to feedback inhibition by L-leucine, leading to intracellular L-leucine accumulation. In a laboratory-scale test, awamori brewed with strain T25 showed higher concentrations of isoamyl alc. and isoamyl acetate than that brewed with strain HC02-5-2. Such a combinatorial approach to yeast isolation, with wholegenome anal. and metabolism-focused breeding, has the potentials to vary the quality of alc. beverages.

Frontiers in Genetics published new progress about Brewing. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Name: Ethyl octanoate.

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

He, Xi published the artcileConstruction and analysis of a food-grade Lactiplantibacillus plantarum esterase/lipase overexpression system, HPLC of Formula: 123-29-5, the main research area is food grade Lactiplantibacillus esterase lipase overexpression system.

Lactiplantibacillus plantarum (L. plantarum) is widely used in the food industry, especially in meat fermentation and dairy processing, due to its lipase and esterase activities. In this study, lp_1002 from L. plantarum WCFS1 was cloned into the food-grade gene expression vector pMG36n, with nisin used as a selective marker. Furthermore, pMG36n- lp_1002 was retransformed into L. plantarum WCFS1, and lp_1002 was overexpressed in the newly constructed L. plantarum WCFS1 strain. Moreover, recombinant Lp_1002 showed the characteristics of both lipase and esterase. The results from hydrolysis of p-nitrophenylphosphate (pNPP) and triglycerides showed that the hydrolysis activities of the recombinant Lp_1002 were 420% and 360% higher than that of the original strain, resp. In addition, the results of wine MLF fermentation suggest that the recombinant strain significantly reduced the contents of Et esters, acetate esters and other types of esters, which affected wine aroma during brewing. Therefore, the recombinant strain has great application potential in food fermentation

LWT–Food Science and Technology published new progress about Brewing. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, HPLC of Formula: 123-29-5.

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