Tag: M.W=150-200

Li, Shan published the artcileProbiotic potential of γ-aminobutyric acid (GABA)-producing yeast and its influence on the quality of cheese, Computed Properties of 123-29-5, the main research area is yeast aminobutyric acid probiotic potential cheese quality; aroma; physical and chemical indicators; probiotic; yeast; γ-aminobutyric acid (GABA).

Kazakh cheese is a traditional dairy product in Xinjiang, China. To study the function and potential probiotic characteristics of yeast in Kazakh cheese and its contribution to cheese fermentation, we screened the γ-aminobutyric acid (GABA)-producing yeasts Pichia kudriavzevii 1-21, Kluyveromyces marxianus B13-5, Saccharomyces cerevisiae DL6-20, and Kluyveromyces lactis DY1-10. We investigated the potential probiotic properties of these strains and their use in cheese fermentation (cheeses designated CSP, CSM, CSS, and CSI, resp.); a control with no added yeast was designated CS. The results showed that the 4 yeast strains all showed high self-polymerization (2- and 24-h autoaggregation capacity of >80 and 90%, resp.), hydrophobicity (40-92% variation, low hydrophobicity in xylene, but within the range of probiotics), and the ability to survive the gastrointestinal tract (survival rate >75% after simulation), indicating the probiotic ability of the strains in vitro. The GABA production capacity of the CSM cheese increased (to 95.6 mg/100 g), but its protein content did not change significantly, and amino acid degradation was obvious. The GABA production capacity of the CSS cheese decreased (to 450 mg/kg); its protein content declined, and its amino acid content increased. Except for water and protein, we found no obvious differences in most phys. and chem. indicators. Kluyveromyces marxianus B13-5 helped to form the desired texture. Multivariate statistical anal. showed that fermentation of the cheese with the 4 yeasts improved the production of esters and alcs. The CSS cheese had good aroma production performance, because S. cerevisiae DL6-20 produced high concentrations of isoamyl alc., hexanoic acid Et ester, benzyl alc., octanoic acid Et ester, 3-hydroxy-2-butanone, and hexanoic acid; the content of 2-methyl-propanoic acid was low. Compared with the CSP cheese, the CSI and CSM cheeses had a fruitier aroma and a milder odor, but the CSI and CSM cheeses had high concentrations of Et acetate, butanoic acid, Et ester, 3-methyl-1-butanol-acetate, Et hexanoate, Et octanoate, acetic acid 2-phenylethyl ester, and Et lactate; concentrations of 3-methyl-butanoic acid, propanoic acid, acetic acid, and butanoic acid were low. The CSP cheese had stronger acid-producing ability. The order of fragrance production performance was CSS > CSI, CSM > CSP > CS. Research into the fermentation mechanisms of GABA-producing yeast in cheese will provide a theor. basis for the quality control and industrial production of Kazakh cheese.

Journal of Dairy Science published new progress about Aggregation. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Computed Properties of 123-29-5.

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

Rashed, Nurnobi Md. published the artcileDirect Phenolysis Reactions of Unactivated Amides into Phenolic Esters Promoted by a Heterogeneous CeO2 Catalyst, Synthetic Route of 140-11-4, the main research area is phenolic ester preparation solvent free; amide aliphatic aromatic alc direct phenolysis CeO2 catalyst; acid-base cooperation; heterogeneous catalysts; phenolic esters; phenolysis; unactivated amides.

The direct catalytic esterification of amides that leads to the construction of C-O bonds through the cleavage of amide C-N bonds is a highly attractive strategy in organic synthesis. While aliphatic and aromatic alcs. can be readily used for the alcoholysis of activated and unactivated amides, the introduction of phenols is more challenging due to their lower nucleophilicity in the phenolysis of unactivated amides. Herein, phenols can be used for the phenolysis of unactivated amides into the corresponding phenolic esters using a simple heterogenous catalytic system based on CeO2 under additive-free reaction conditions was demonstrated. The method tolerates a broad variety of functional groups (>50 examples) in the substrates. Results of kinetic studies afforded mechanistic insights into the principles governing this reaction, suggesting that the cooperative effects of the acid-base functions of catalysts would be of paramount importance for the efficient progression of the C-N bond breaking process, and consequently, CeO2 showed the best catalytic performance among the catalysts explored.

Chemistry – A European Journal published new progress about Alcoholysis. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Synthetic Route of 140-11-4.

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

Islam, Muhammad Ghayas Ul published the artcileBiodiesel production from wild olive oil using TPA decorated Cr-Al acid heterogeneous catalyst, COA of Formula: C11H22O2, the main research area is tungstophosphonic acid chromium aluminum heterogeneous catalyst olive oil biodiesel.

In the present work, wild olive (Olea oleaster) plant oil was chosen as a hopeful feedstock for efficient biodiesel production Mixed oxides of aluminum and chromium were modified with different amounts (10-40 weight%) of 12-tungstophosphonic acid (TPA), used for biodiesel production from low cost local wild olive oil (WOO). Moreover, the physicochem. characteristics of the synthesized catalysts were elaborated with different anal. techniques such as XRD, SEM, EDX, BET. The biodiesel reaction was carried out in a single step via trans-esterification reaction using TPA impregnated Cr-Al mixed oxide catalyst. The maximum 93% biodiesel yield was obtained under the optimized conditions: oil/methanol molar ratio 1:21, reaction temperature 80°C, catalyst dosage 4 wt% and reaction times 5 h with stirring speed of 600 rpm. Interestingly, the reusability experiments showed that the synthesized catalyst sustained remarkable stability and reusability up to 5 runs in the biodiesel production from wild olive oil. Furthermore, the synthesized biodiesel completely complied with international standards

Chemical Engineering Research and Design published new progress about Acid number. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, COA of Formula: C11H22O2.

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

Islam, Muhammad Ghayas Ul published the artcileBiodiesel production from wild olive oil using TPA decorated Cr-Al acid heterogeneous catalyst, Name: Methyl octanoate, the main research area is tungstophosphonic acid chromium aluminum heterogeneous catalyst olive oil biodiesel.

In the present work, wild olive (Olea oleaster) plant oil was chosen as a hopeful feedstock for efficient biodiesel production Mixed oxides of aluminum and chromium were modified with different amounts (10-40 weight%) of 12-tungstophosphonic acid (TPA), used for biodiesel production from low cost local wild olive oil (WOO). Moreover, the physicochem. characteristics of the synthesized catalysts were elaborated with different anal. techniques such as XRD, SEM, EDX, BET. The biodiesel reaction was carried out in a single step via trans-esterification reaction using TPA impregnated Cr-Al mixed oxide catalyst. The maximum 93% biodiesel yield was obtained under the optimized conditions: oil/methanol molar ratio 1:21, reaction temperature 80°C, catalyst dosage 4 wt% and reaction times 5 h with stirring speed of 600 rpm. Interestingly, the reusability experiments showed that the synthesized catalyst sustained remarkable stability and reusability up to 5 runs in the biodiesel production from wild olive oil. Furthermore, the synthesized biodiesel completely complied with international standards

Chemical Engineering Research and Design published new progress about Acid number. 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

Wei, Daiyue published the artcileImproving the lipid oxidation in pork fat processing for Chi-aroma Baijiu through pretreatments and segmented soaking with liquor, Related Products of esters-buliding-blocks, the main research area is lipid oxidation pork fat liquor segmented soaking.

This study aimed to explore an efficient method to prepare ageing pork fat used as catalyst in the production of Chi-aroma Baijiu. Results showed that boiling after warm water treatment was the best pretreatment method, which could eliminate off-odor greatly by decreasing aldehydes, fusels, esters, alkanes, alkenes and aromatics in raw pork fat, and would significantly (p < 0.05) improve TBARS (2-thiobarbituric acid-reactive substances) value and fatty acids dissolution during following 3-mo soaking. Compared to pure alc. solution, basic liquor mixed with fat oil as soaking solution could significantly (p < 0.05) increase acid value. Soaking pork fat in high-alc.-volume (500 mL ethanol/L) and then low-alc.-volume (300 mL ethanol/L) basic liquor subsequently, could accelerate the release of fatty acids into basic liquor. Segmented soaking by adding fat oil at the 6th month following 5 mo basic liquor soaking was the most efficient method, in which both TBARS value and acid value were increased, up to 2.89 ± 0.37 mg malondialdehyde (MDA)/kg and 4.97 ± 0.04 mg KOH/g, resp., and PUFA (polyunsaturated fatty acids)/SFA (saturated fatty acids) was lowest (0.44 ± 0.00). It provides potential strategies to accelerate the ageing process of pork fat for Chi-aroma Baijiu industry. LWT--Food Science and Technology published new progress about Acid number. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Related Products of esters-buliding-blocks.

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

Adama, K. K. published the artcileComponent distribution associated with phase separation and purification of tropical almond biodiesel at different temperatures, Recommanded Product: Methyl decanoate, the main research area is almond biodiesel component distribution phase separation purification.

Accurate knowledge of the components in the purification of biodiesel is important in achieving consistency in quality for the separation and purification process. In this paper, ternary phase diagrams were used to study the phase separation and purification of tropical almond biodiesel at temperatures of 20 °C, 30 °C and 40 °C. The biodiesel was produced using alk. transesterification of the seed oil. The biodiesel was characterized using ASTM and EN standard methods. A modified cloud point titration procedure under constant temperature was used to determine the tie lines and binodal compositions The phase mixture compositions were determined using gas chromatog. method. Distribution coefficient and selectivity anal. were performed and data accuracy, consistency and reliability were done using a first-order linear polynomial model. The result revealed free fatty acid values for the oil and the biodiesel as 0.63 and 0.23 resp. The data quality and reliability showed a high coefficient of determination of 0.9998, adjusted coefficient of determination of 0.9887, a standard deviation of 0.0327, and a correlation coefficient of 0.8349 at the investigated temperatures Methanol was prevalent in the glycerol phase. Ternary phase diagrams provided the visual means of estimating the distribution of the components.

Renewable Energy published new progress about Acid number. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Recommanded Product: Methyl decanoate.

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

Adama, K. K. published the artcileComponent distribution associated with phase separation and purification of tropical almond biodiesel at different temperatures, Safety of Methyl octanoate, the main research area is almond biodiesel component distribution phase separation purification.

Accurate knowledge of the components in the purification of biodiesel is important in achieving consistency in quality for the separation and purification process. In this paper, ternary phase diagrams were used to study the phase separation and purification of tropical almond biodiesel at temperatures of 20 °C, 30 °C and 40 °C. The biodiesel was produced using alk. transesterification of the seed oil. The biodiesel was characterized using ASTM and EN standard methods. A modified cloud point titration procedure under constant temperature was used to determine the tie lines and binodal compositions The phase mixture compositions were determined using gas chromatog. method. Distribution coefficient and selectivity anal. were performed and data accuracy, consistency and reliability were done using a first-order linear polynomial model. The result revealed free fatty acid values for the oil and the biodiesel as 0.63 and 0.23 resp. The data quality and reliability showed a high coefficient of determination of 0.9998, adjusted coefficient of determination of 0.9887, a standard deviation of 0.0327, and a correlation coefficient of 0.8349 at the investigated temperatures Methanol was prevalent in the glycerol phase. Ternary phase diagrams provided the visual means of estimating the distribution of the components.

Renewable Energy published new progress about Acid number. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Safety of Methyl octanoate.

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

Ghani, Naila published the artcileA Facile Approach for the Synthesis of SrTiO3/g-C3N4 Photo-catalyst and its Efficacy in Biodiesel Production, Name: Methyl decanoate, the main research area is biodiesel production strontium titanate graphitic carbon nitride photocatalyst.

Visible light active photocatalysts have attracted a lot of interest due to their simple chem. workup and recyclability. In this study, the role of Strontium Titanate/graphitic Carbon Nitride composite (SrTiO3/g-C3N4) was investigated for the pretreatment of waste frying oil (WFO) to reduce high free fatty acids (FFAs) for biodiesel production SrTiO3/g-C3N4 photo-catalyst was synthesized through the facile refluxing method and its activity was also compared with simple graphitic carbon nitride (g-C3N4). Exptl. results revealed that SrTiO3/g-C3N4 possesses higher efficiency as compared to g-C3N4. Photo-catalyst was characterized through SEM-EDX, XRD and FT-IR. Maximum conversion of FFAs (85%) was achieved at 1% catalyst dose, 800 rpm stirring speed, 3 : 1 methanol to oil ratio, and 4 h of reaction time. Esterified WFO was converted to waste frying oil Me esters (WFOME) by using CaO-KOH heterogeneous catalyst. The maximum yield of WFOME was obtained at 1.25% catalyst dose, 65 °C, 600 rpm, 2 h of reaction time, and 12 : 1 methanol to oil ratio. Physicochem. anal. of WFOME revealed that it is in accord with ASTM standards

ChemistrySelect published new progress about Acid number. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Name: Methyl decanoate.

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

Borah, Manash Jyoti published the artcileSynthesis and application of Co doped ZnO as heterogeneous nanocatalyst for biodiesel production from non-edible oil, COA of Formula: C9H18O2, the main research area is cobalt doped zinc oxide nanocatalyst biodiesel non edible oil.

Exploration of non-edible oil as a feedstock and the use of new heterogeneous nanocatalyst could contribute to bioenergy research. In this regard, the present work is focussed on the use of cobalt doped zinc oxide nanocatalyst for production of biodiesel from Mesua ferrea oil. The synthesized catalyst has been analyzed through X-ray diffraction (XRD), Fourier Transform IR Spectroscopy (FT-IR), SEM (SEM), Energy Dispersive X-ray (EDX), and Thermogravimetric anal. (TGA) techniques. Under optimal reaction condition, maximum biodiesel conversion of 98.03% was obtained in 3 h at 60°C with 2.5 wt% catalyst loading and 1:9 oil to methanol molar ratio. The produced biodiesel has been characterized using Proton NMR (1H NMR), Carbon NMR (13C NMR) and Gas Chromatog.-Mass Spectroscopy (GC-MS) techniques. Fuel properties of the produced biodiesel have also been determined The result showed good catalytic activity of cobalt doped Zinc oxide nanocatalyst and could be used for large scale biodiesel production from Mesua ferrea oil by further enhancing its stability.

Renewable Energy published new progress about Acid number. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, COA of Formula: C9H18O2.

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

Marso, Tuan Mohommed Mudassar published the artcileZnO/CuO composite catalyst to pre-esterify waste coconut oil for producing biodiesel in high yield, Synthetic Route of 110-42-9, the main research area is zinc copper oxide composite catalyst waste coconut oil biodiesel.

The study reported herein describes a two-stepped catalytic approach to produce biodiesel from waste-coconut oil in high (> 90%) yield. In this regard, pre-esterification of the Free Fatty Acid (FFA) content (9.58 mg KOH g-1) of waste coconut oil in the presence of a simple ZnO/CuO composite, as a heterogeneous acid-catalyst to prevent competitive saponification and hydrolysis side reactions caused by FFA, followed by the base-catalyzed transesterification of the triglyceride of oil was performed. The ZnO/CuO catalyst was synthesized using a simultaneous precipitation method, and characterized by spectroscopic (FTIR, UV-Vis), SEM, XRD and XRF techniques. The surface acidity of the catalyst and the FFA value (AV) of the oil before and after the pre-esterification was determined using the Hammett indicator method. The pre-esterification was performed at different temperatures (5-125°C), time intervals (15-235 min), and using different weight percentages (wt%) of catalyst loading (0.005-2.665) and methanol-to-oil ratios. The optimum reaction conditions were identified using a central composite rotatable design (CCRD). The results of the study revealed that a small amount of the catalyst (1.66 wt%) is enough, and the catalyst could be easily recovered and reused 3-4 catalytic runs for reducing the AV of waste coconut oil by 94.53% under milder conditions (within 113 min, at 55°C in the presence of 10.5:1 methanol-to-oil ratio) than those conditions reported so far. The biodiesel obtained this way was free from soap, and consistent with ASTM-D6751 and EN-14214 standards

Reaction Kinetics, Mechanisms and Catalysis published new progress about Acid number. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Synthetic Route of 110-42-9.

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