Tag: M.W=150-200

Zhang, Boqin published the artcileUse of Torulaspora delbrueckii and Hanseniaspora vineae co-fermentation with Saccharomyces cerevisiae to improve aroma profiles and safety quality of Petit Manseng wines, Recommanded Product: Ethyl nonanoate, the main research area is Torulaspora Hanseniaspora Saccharomyces fermentation safety quality Petit Manseng wines.

Nowadays, the inoculation of more than one non-Saccharomyces species in combination with S. cerevisiae was proposed to compensate the shortage of one non-Saccharomyces species and further enhance the wine quality. In this work, the fermentation performance of different co-inoculation ratios of Hanseniaspora vineae CVE-HV6 and Torulaspora delbrueckii CVE-TD20 sequential inoculation with S. cerevisiae was evaluated in Petit Manseng grape must. Results revealed that H. vineae and T. delbrueckii co-inoculation treatments increased the concentrations of desired aroma compounds, and decreased levels of acetic acid and biogenic amines compared to S. cerevisiae pure culture and the mixed cultures involved one non-Saccharomyces strain. The treatment of H. vineae and T. delbrueckii with a 2:8 inoculation ratio achieved the highest levels of major Et esters and the lowest level of acetic acid. Wines using co-inoculation of T. delbrueckii and H. vineae yeasts had less biogenic amines, especially tyramine, which was more pronounced with the increasing proportion of H. vineae. These results indicated that co-inoculating H. vineae and T. delbrueckii strains with the optimal ratio can make up some enol. shortages of non-Saccharomyces species, and effectively improve the overall quality of wine products.

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

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

Wang, Liwen published the artcileSiO2 supported Ni-In intermetallic compounds: Efficient for selective hydrogenation of fatty acid methyl esters to fatty alcohols, SDS of cas: 111-11-5, the main research area is SiO2 nickel indium hydrogenation fatty acid methyl ester alc.

Ni/SiO2 and SiO2 supported Ni2In, NiIn and Ni2In3 intermetallic compounds (IMCs) were prepared by the sol-gel method and tested for the selective hydrogenation of Me esters to fatty alcs. It was found that the Ni phyllosilicate formed during the sol-gel process leads to high Ni dispersion. In IMCs, the Ni atoms are homogeneously isolated by the In ones and the charge is transferred from In to Ni. In the selective hydrogenation, decarbonylation/decarboxylation dominatingly occur on Ni/SiO2, while SiO2 supported IMCs mainly give fatty alcs., and the yield of fatty alc. can reach above 94%. We suggest that it is the synergetic effect between Ni and In that facilitates the selective hydrogenation to yield fatty alcs. The catalyst stability was also investigated, and the catalyst deactivation is mainly ascribed to the carbonaceous deposit.

Applied Catalysis, B: Environmental published new progress about Adsorption. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, SDS of cas: 111-11-5.

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

Richter, Tobias M. published the artcileBinding and release of odor compounds from textiles: Changing fiber selection for apparel, Category: esters-buliding-blocks, the main research area is odor compound binding release textile fiber selection apparel.

Understanding odor volatiles known to constitute those emanating from the human body and how these interact with textiles is relevant to diverse interested parties because of changing fiber use, a better understanding of apparel life cycles including cleaning and the potential for fiber/textile re-use. This paper extends the application of our proton transfer reaction-mass spectrometry model system on adsorption and release behavior of fiber types typical of next-to-skin uses to include both viscose and other volatile organic compounds in body odor for which release has not previously been studied (hexanoic acid, acetone, cyclohexanone, hexanal, Me butanoate, Et benzene, 1-octanol, decanal, butanoic acid). The current findings confirmed release patterns of different fiber types found in our earlier studies – low release of volatile organic compounds from cotton and wool, but higher release from polyester – and made a new finding of low release from viscose. Adsorption characteristics were different given the different volatile organic compounds analyzed. Viscose showed better adsorption characteristics for primarily polar volatile organic compounds, but was otherwise very similar to cotton.

Textile Research Journal published new progress about Adsorption. 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

Li, Fuzeng published the artcileFlotation and adsorption mechanism studies of antimony sulfide with 5-heptyl-1,3,4-oxadiazole-2-thione as a collector, Quality Control of 111-11-5, the main research area is antimony sulfide heptyl oxadiazole thione collector flotation adsorption.

Oxadiazole-thione compounds include the conjugated N-, O- and S-donor atoms and possess special metal-chelating properties. In the paper, an alkyl oxadiazole-thione surfactant, 5-heptyl-1,3,4-oxadiazole-2-thione (HpODT) was designed and synthesized as a chelating collector used for the recovery of antimony sulfide. Micro-flotation tests showed that the HpODT has better recovery and selectivity for antimony sulfide against iron and cadmium sulfide in comparison with sodium iso-Bu xanthate (SIBX). The adsorption anal. indicated that the adsorption of HpODT on antimony sulfide was a spontaneous-exothermic chemisorption process. The UV absorption spectrum (UVAS) revealed that HpODT might anchor on antimony sulfide surfaces by adsorption monolayers. The zeta potential and FTIR inferred recommended a chemisorption of antimony sulfide to HpODT. XPS afforded distinct proofs that the conjugated N- and S-donor atoms of HpODT coordinate with the surface antimony atoms of antimony sulfide to generate the hydrophobic HpODT-Sb surface complexes.

Minerals Engineering published new progress about Adsorption. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Quality Control of 111-11-5.

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

Huang, Qing published the artcileNitric acid functionalization of petroleum coke to access inherent sulfur, Quality Control of 111-11-5, the main research area is petcoke nitric sulfuric acid catalyst treatment dibenzothiophene oxidation.

Sulfonated carbon-based catalysts have been identified as promising solid acid catalysts, and petroleum coke (petcoke), a byproduct of the oil industry, is a potential feedstock for these catalysts. In this study, sulfur-containing (6.5 wt%) petcoke was used as a precursor for these catalysts through direct functionalization (i.e., without an activation step) with nitric acid to access the inherent sulfur. Catalysts were also prepared using sulfuric acid and a mixture of nitric and sulfuric acid (1:3 vol ratio). Fourier transform IR spectroscopy, XPS, and titration were used to identify and quantify the acid sites. The activities of the prepared catalysts were determined for the esterification of octanoic acid with methanol. Petcoke had few -SO3H groups, and correspondingly no catalytic activity for the reaction. All acid treatments increased the number of -SO3H groups and promoted esterification. Treatment with nitric acid alone resulted in the oxidation of the inherent sulfur in petcoke to produce ∼0.7 mmol/g of strong acid sites and a total acidity of 5.3 mmol/g. The acidity (strong acid and total) was lower with sulfuric acid treatment but this sample was more active for the esterification reaction (TOF of 31 h-1 compared to 7 h-1 with nitric acid treatment).

Catalysts published new progress about Adsorption. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Quality Control of 111-11-5.

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

Khan, Ihtisham Wali published the artcileBiodiesel production by valorizing waste non-edible wild olive oil using heterogeneous base catalyst: Process optimization and cost estimation, Application In Synthesis of 111-11-5, the main research area is biodiesel valorizing waste wild olive oil heterogeneous base catalyst.

The current research investigates sustainable biodiesel production from non-edible wild olive oil via novel Na/SiO2/TiO2 heterogeneous catalyst. The catalyst was synthesized by Sol-Gel and wet impregnation method. Furthermore, the designed catalyst was evaluated by various spectroscopic techniques like SEM, EDX, XPS, FTIR, BET and XRD. The impact of various influencing parameters such as catalyst loading, reaction temperature, oil/methanol molar ratio and reaction time were scrutinized and the maximum 97% yield was achieved at the reaction conditions of 1:20 WOSO/MeOH molar ratio, 9 wt% catalyst loading at 70°C and 120 min of reaction time. The synthesized biodiesel was confirmed from GC-MS anal., whereas the various physiochem. properties of synthesized biodiesel were explored by ASTMD 5761 and EN 1404 methods. The plausible reaction mechanism of Na/SiO2/TiO2 catalyzed WOSO was also proposed. Finally, the cost estimation of the designed catalyst investigates its com. viability for low cost biodiesel production using non-edible WOSO feedstock.

Fuel published new progress about Adsorption. 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

Ncube, Somandla published the artcileDetermination of volatile compounds during deterioration of African opaque beer using a stir bar sorptive extraction technique and gas chromatography-high resolution mass spectrometry, Application In Synthesis of 123-29-5, the main research area is Opaque beer volatile compound SBSE GC HRT; (HS)-SPME, (headspace)-solid phase microextraction; Beer deterioration; CIS, cooled injection system; GC-HRT, gas chromatography-high resolution time-of-flight mass spectrometry; Gas chromatography-high resolution mass spectrometry; Opaque beer; PDMS, polydimethylsiloxane; SBSE, stir bar sorptive extraction; Stir bar sorptive extraction; TDU, thermal desorption unit; Volatile compounds.

Opaque beer traditional to African communities undergoes quick deterioration and is consumed within 7 days of its production The current study has utilized a stir bar sorptive extraction technique followed by GC-HRT determination to trace variations of 84 volatile compounds in four opaque beers commonly brewed in South Africa over the 7-day shelf life period. The major fruity esters were observed to increase up to Day 4 and eventually decreasing until Day 7 where their levels were finally lower than Day 1. Aldehydes reduced drastically and were less than 50% on Day 2 and becoming almost undetectable at Day 7. The common beer alcs. (phenylethyl alc. and 3-methyl-1-butanol) decreased during beer shelf life while phenolics with undesirable medicinal tastes (creosol and p-cresol) increased up to 24-fold by Day 7. This study might open future research perspectives around opaque beer traditional to African rural communities.

Current Research in Food Science published new progress about Adsorption. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Application In Synthesis of 123-29-5.

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

Xu, Dan published the artcileSelective oxidation of alcohols to high value-added carbonyl compounds using air over Co-Co3O4@NC catalysts, HPLC of Formula: 110-42-9, the main research area is alc carbonyl compound cobalt tetraoxide carbon catalyst selective oxidation.

The sustainable catalytic transformation of alcs. to high value-added fine chems. is a significant and challenging research topic. Herein, a set of nitrogen-doped carbon encapsulated Co-based catalysts (Co-Co3O4@NC-T) were prepared by using low-cost dicyandiamide, glyoxal and cobalt nitrate as precursors. The obtained catalysts were utilized for the selective oxidation of alcs. to high value-added esters and carboxylic acids with air as the oxygen source and displayed wide applicability for the oxidation of both aromatic and aliphatic alcs. Based on the controlled experiments, the protective effect of N-doped carbon structure and the synergistic effect between Co core and Co3O4 species guaranteed the high reaction conversion and selectivity. Benefitting from heterogeneity and magnetism of the catalyst, it can be easily recycled and reused for long-term stability. Reasonable mechanisms of selective oxidation reaction were proposed through EPR anal. and controlled experiments The present work provides a facile strategy for potential large-scale preparation of heterogeneous catalyst for sustainable and green catalytic transformations.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Adsorption. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, HPLC of Formula: 110-42-9.

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

Ma, Gamaliel Junren published the artcileElucidating How Different Amphipathic Stabilizers Affect BSA Protein Conformational Properties and Adsorption Behavior, HPLC of Formula: 111-11-5, the main research area is amphipath stabilizer bovine serum albumin protein conformation adsorption.

Natural proteins such as bovine serum albumin (BSA) are readily extracted from biol. fluids and widely used in various applications such as drug delivery and surface coatings. It is standard practice to dope BSA proteins with an amphipathic stabilizer, most commonly fatty acids, during purification steps to maintain BSA conformational properties. There have been extensive studies investigating how fatty acids and related amphiphiles affect solution-phase BSA conformational properties, while it is far less understood how amphipathic stabilizers might influence noncovalent BSA adsorption onto solid supports, which is practically relevant to form surface coatings. Herein, we systematically investigated the binding interactions between BSA proteins and different molar ratios of caprylic acid (CA), monocaprylin (MC), and Me caprylate (ME) amphiphiles-all of which have 8-carbon-long, saturated hydrocarbon chains with distinct headgroups-and resulting effects on BSA adsorption behavior on silica surfaces. Our findings revealed that anionic CA had the greatest binding affinity to BSA, which translated into greater solution-phase conformational stability and reduced adsorption-related conformational changes along with relatively low packing densities in fabricated BSA adlayers. On the other hand, nonionic MC had moderate binding affinity to BSA and could stabilize BSA conformational properties in the solution and adsorbed states while also enabling BSA adlayers to form with higher packing densities. We discuss physicochem. factors that contribute to these performance differences, and our findings demonstrate how rational selection of amphiphile type and amount can enable control over BSA adlayer properties, which could lead to improved BSA protein-based surface coatings.

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

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

Tofalo, Rosanna published the artcileImpact of Saccharomyces cerevisiae and non-Saccharomyces yeasts to improve traditional sparkling wines production, Safety of Ethyl octanoate, the main research area is Saccharomyces cerevisiae Torulaspora delbrueckii sparkling wine production hydrolysis; Aroma compounds; Champenoise method; Saccharomyces cerevisiae; Sparkling wines; Starmerella bacillaris; Torulaspora delbrueckii; non-Saccharomyces yeasts.

In this study the effect of a co-inoculum of S. cerevisiae (F6789) with Torulaspora delbrueckii (TB1) or Starmerella bacillaris (SB48) on the oenol. and aroma characteristics of sparkling wines obtained with the Champenoise method was investigated. The autolytic outcome and the sensory profile of sparkling wines were also evaluated. The secondary fermentations were completed by all mixed and single starter cultures with the only exception of those guided by Starm.bacillaris. Sparkling wines produced with S. cerevisiae F6789+Starm.bacillaris SB48 showed the highest amounts of glycerol (6.51 g/L). The best autolytic potential was observed in sparkling wines produced with +Starm.bacillaris (81.98 mg leucin/L) and S. cerevisiae+T. delbrueckii (79.03 mg leucin/L). The lowest value was observed for sparkling wines obtained with S. cerevisiae F6789 (53.96 mg leucin/L). Sparkling wines showed different aroma and sensory profiles. Esters were mainly present in sparkling wines obtained with S. cerevisiae F6789 (88.09 mg/L) followed by those obtained with S. cerevisiae+T. delbrueckii (87.20 mg/L), S. cerevisiae +Starm.bacillaris (81.93 mg/L). The content of esters decreased over time, and that might be related to the adsorption on lees and chem. hydrolysis. The highest concentrations of higher alcs. were found in sparkling wines produced with S. cerevisiae+T. delbrueckii (27.50 mg/L). Sparkling wines obtained with S. cerevisiae +Starm.bacillaris were well differentiated from the others due to their high score for the descriptor for spicy, bread crust, freshness and floral. Tailored strains with different autolytic potential might represent an interesting strategy to improve traditional sparkling wine production and favor their differentiation.

Food Microbiology published new progress about Adsorption. 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