Author: tianli

Zhang, Xinyi published the artcileChanges in Red Wine Composition during Bottle Aging: Impacts of Grape Variety, Vineyard Location, Maturity, and Oxygen Availability during Aging, Category: alcohols-buliding-blocks, the main research area is grape maturity vineyard oxygen red wine bottle aging; grape maturity; grape variety; oxygen availability; red wine composition evolution; vineyard location.

This work investigated the influence of grape variety, vineyard location, and grape harvest maturity, combined with different oxygen availability treatments, on red wine composition during bottle aging. Chemometric anal. of wine compositional data (i.e., wine color parameters, SO2, metals, and volatile compounds) demonstrated that the wine samples could be differentiated according to the different viticultural or bottle-aging factors. Grape variety, vineyard location, and grape maturity showed greater influence on wine composition than bottle-aging conditions. For most measured wine compositional variables, the evolution patterns adopted from the viticultural factors were not altered by oxygen availability treatment. However, contrasting evolution patterns for some variables were observed according to specific viticultural factors, with examples including di-Me sulfide, phenylacetaldehyde, maltol, and β-damascenone for vineyard locations, 2-methylbutanal, 1,4-cineole, and linalool for grape variety, and methanethiol, methional, and homofuraneol for grape maturity.

Journal of Agricultural and Food Chemistry published new progress about Food aging. 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Grundl, Gabriel published the artcileSalting-out and salting-in effects of organic compounds and applications of the salting-out effect of Pentasodium phytate in different extraction processes, HPLC of Formula: 64519-82-0, the main research area is pentasodium phytate extraction process.

The influence of different uncharged and charged organic compounds on the Lowest Solution Temperature (LST) of a water/dipropylene glycol Pr ether (DPnP) mixture is investigated. Depending on the nature of the additive, a salting-out or salting-in behavior could be observed For the binary mixture, a salting-out effect is associated with a decrease of the LST with increasing additive concentrations The reverse effects are observed with increasing salting-in additive concentrations Typical sugars, short carboxylate sodium salts, ammonium organic salts and amino-acids were found to be salting-out, whereas all studied sweeteners and organic acids showed a salting-in behavior. The Pentasodium phytate ((Phy5 -, 5Na+)) was found being the most efficient organic salting-out compound Three possible applications were investigated in order to compare the salting-out effect of (Phy5 -, 5Na+) to classical inorganic salts. First, the liquid-liquid extraction of 5-hydroxymethylfurfural (HMF) was investigated and compared to former results obtained using lithium, sodium and aluminum sulfate salts. Secondly, we considered a liquid-liquid, ethanol-water separation and compared the results to the one obtained using ammonium sulfate and potassium pyrophosphate. Finally, the salting-out effect of (Phy5 -, 5Na+) on glycerol was investigated and also compared to the inorganic salts, sodium chloride and lithium sulfate as well as potassium and sodium phosphates. Due to higher water solubility, (Phy5 -, 5Na+) allowed a more pronounced separation of HMF than the tested sulfate salts. This high water solubility drives also to a more pronounced separation of ethanol in comparison to ammonium sulfate; potassium pyrophosphate being the most water soluble and most efficient salt to sep. ethanol and water. The use of (Phy5 -, 5Na+) and potassium pyrophosphate showed a salting-out effect on glycerol in contrast to the inorganic salts sodium chloride and lithium sulfate for which a salting-in effect on glycerol was observed The salting-out effect of sodium triphosphate was limited by its water solubility

Journal of Molecular Liquids published new progress about Extraction. 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, HPLC of Formula: 64519-82-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kloetzer, Lenuta published the artcileSeparation of fumaric acid by amine extraction without and with 1-octanol as phase modifier, Formula: C8H18O, the main research area is fumaric acid reactive extraction Amberlite LA2 amine octanol modifier.

The aim of the current experiments was to study the reactive extraction of fumaric acid using Amberlite LA-2 and to comparatively analyze the influences of the process parameters (pH-value of aqueous phase, extractant concentration, and organic phase polarity) on the separation performances for the extraction systems with and without 1-octanol. Also, original equations describing the influence of extractant concentration on distribution coefficient were proposed. The results indicated that the mechanism of the interfacial reaction between acid FA(COOH)2 and extractant (Q) is controlled by the organic phase polarity and the pH-value of aqueous phase plays an important role on extraction efficiency. Thus, the structure of the extracted complexes, in the absence of 1-octanol, are FA(COOH)2Q2 for n-heptane and FA(COOH)2Q for dichloromethane. The addition of 1-octanol modified only the structure of complexes extracted in n-heptane to FA(COOH)2Q. The pos. effect of 1-octanol on extraction efficiency was quantified by means of the amplification factor, its maximum values being 2.8 for dichloromethane, and 2.48 for n-heptane. The extraction mechanism influences also the value of the extraction constant, the highest value, KE = 1.31 ·103 (L2·mol-2), was obtained for lower polarity of the organic phase, namely n-heptane.

Separation and Purification Technology published new progress about Extraction. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Formula: C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Uslu, Hasan published the artcileExtraction of Propionic Acid from Aqueous Solutions Using Tri-n-octylphosphine Oxide and Dioctylamine in Different Solvents, Recommanded Product: n-Octanol, the main research area is propionic acid extraction TOPO dioctylamine mixture solvent.

This work examines the reactive extraction of propionic acid, a promising liquid-liquid extraction technique, using tri-n-octylphosphine oxide (TOPO) or dioctylamine (DOA) diluted with eight different solvents (n-octane, Me iso-Bu ketone (MIBK), 1-octanol, Et Me ketone, diisobutyl ketone, n-decane, di-Et sabecate, 1-decanol) at 298.15 K to determine the most efficient mixture for the extraction processes. A phosphorous-based extractant, TOPO, has been chosen for the extraction tests since it has low water solvency and is more ecol. agreeable than the amine-type extractants. Among the other amine extractants reported in reactive extraction studies, there is no study on propionic acid extraction using DOA in the literature. Phys. extraction experiments with pure solvents were also performed to analyze the effect of TOPO and DOA on the extraction process. Distribution coefficients, loading factors, and extraction yields of the processes were determined for the explanation of the results. It was concluded that the addition of TOPO or DOA to the organic phase significantly improves the extraction of propionic acid from its aqueous media. The extraction of propionic acid, using the binary solutions of TOPO/diluent or DOA/diluent, improves with an increase in the initial TOPO or DOA concentration The highest extraction yield, E% = 98.01, was achieved with the DOA + Me iso-Bu ketone (MIBK) extractant system (1.652 mol kg-1), with a distribution coefficient of KD= 49.352; thus, the use of the DOA/methyl iso-Bu ketone system in the organic phase is suggested for the propionic acid extraction methods.

Journal of Chemical & Engineering Data published new progress about Extraction. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Recommanded Product: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Roncal, Tomas published the artcilePurification and concentration of formic acid from formic acid/gluconic acid mixtures by two successive steps of nanofiltration and reactive liquid-liquid extraction, COA of Formula: C8H18O, the main research area is purification concentration formic gluconic acid mixture nanofiltration reactive extraction.

A downstream process for the purification and concentration of formic acid (FA) from FA/gluconic acid (GA) mixtures, obtainable by a coupled biocatalytic reaction of CO2 reduction and glucose oxidation, has been developed. The process involved two technologies: (i) a first nanofiltration (NF) step to sep. FA and GA, and (ii) a second reactive liquid-liquid extraction (RLLE) step to concentrate FA. The NF process, using a Synder NFX membrane, consisted of three NF steps separated into two divergent lines, named permeate and retentate pathways. The first NF was common for both pathways, resulting in a permeate strongly enriched in FA and depleted in GA, and a retentate with opposite characteristics. In the permeate pathway, this first permeate was subjected to a second NF to obtain a 99.6% pure FA permeate. In the retentate pathway, an addnl. NF step on the first retentate resulted in a concentrated 99.4% pure GA retentate. The final diluted FA permeate was concentrated by RLLE using tri-N-octylamine as extractant in n-octanol, and a final back-extraction with NaOH. The optimized RLLE process involved a 100-fold volume decrease and resulted in a final FA solution (as sodium formate) of 174.5 g/L, 78 times more concentrated than the feed.

Separation and Purification Technology published new progress about Extraction. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, COA of Formula: C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Waheed, K. published the artcileDiglycolamide Based Mono and Di-Ionic Liquids Having Imidazolium Cation for Effective Extraction and Separation of Pb(II) and Co(II), Recommanded Product: 2,2′-Oxydiacetic acid, the main research area is lead cobalt diglycolamide ionic liquid imidazolium cation extraction separation.

Two glycolamide based functionalized ionic liquids (ILs) having imidazolium cations namely LI (mono-ionic) and LII (di-ionic) were synthesized for the extraction of Pb(II) and Co(II) from waste water. The synthesized ligands were characterized by FTIR and NMR spectroscopy. The extraction efficiency of both mono- and di-ionic liquids was evaluated in terms of contact time, pH of the aqueous phase and metal ion concentration The metal extraction was carried out at various pH values viz. 2, 4, 6, 8, and 10 whereas, at contact time of 15, 30, 45, 60, and 75 min. The optimized pH of 4 and equilibration time of 75 min was further utilized for extraction at various metal ions concentration (50, 100, 150, 200, and 250 ppm). LI exhibited low equilibration time as compared to LII whereas, both ligands showed maximum extraction at a pH of 4. A very high extraction efficiency of up to 99% for both metals was observed with LI and LII under optimized conditions. In addition to that effective separation of Co(II) and Pb(II) was observed at pH 10.

Russian Journal of Inorganic Chemistry published new progress about Extraction. 110-99-6 belongs to class alcohols-buliding-blocks, name is 2,2′-Oxydiacetic acid, and the molecular formula is C4H6O5, Recommanded Product: 2,2′-Oxydiacetic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Matta, Eliana published the artcileDevelopment and characterization of high methoxyl pectin film by using isomalt as plasticizer, Name: (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, the main research area is isomalt methoxyl pectin edible film plasticizer mech property.

The aims of this work were to analyze the effects of high methoxyl pectin (HMP) and isomalt concentrations on the phys. properties of pectin-based films. Films were developed using HMP (1.5% and 3.0% w/v) and isomalt at different concentrations (0.25%, 0.50%, 0.75%, 1.0%, and 1.50% w/v). The use of isomalt produced an improvement in the phys. properties of HMP films. Moisture of films increased and swelling degree decreased with a higher isomalt concentration Films presented higher water vapor permeability (WVP) with an increase in HMP concentration Likewise, WVP values decreased with an increase in isomalt concentration The tensile properties of pectin-based films varied with the use of isomalt. Increasing the amount of isomalt produced more deformable films (elongation at break increased) and led to an increase in the elasticity of HMP films (elastic modulus decreased). The films presented better qualities when obtained from using a 1.5% of HMP and 1.0% of isomalt.

Journal of Food Processing and Preservation published new progress about Elasticity. 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, Name: (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Siewert, Riko published the artcileNon-covalent interactions in molecular systems: thermodynamic evaluation of the hydrogen bond strength in aminoalcohols, HPLC of Formula: 584-02-1, the main research area is aminoalc hydrogen bond stabilization energy formation enthalpy.

In mols. with two functional groups that form hydrogen bonds, the structure-property relationship can depend significantly on the strength of intra-mol. hydrogen bonding. This bonding can cause a substantial conformational change that is accompanied by a frequency shift in the IR spectrum, which provides the basis for exptl. studies. Despite its great importance in biol. systems, the available literature data for the strength of this bonding are scarce and not in agreement. In this work, we present the results of four thermodn. methods for the determination of the strength of intramol. hydrogen bonds. Comprehensive thermochem. anal. of 1-amino-2-alcs. and 2-amino-1-alcs. was performed with Fourier-transform IR spectroscopy, high-level G4 quantum-chem. calculations, the homomorph scheme with enthalpies of vaporization and a group contribution method. With the combination of these four thermodn. methods, the strength of intramol. hydrogen bonding in 1,2-aminoalcs. and 2,1-aminoalcs. was evaluated quant. The results were correlated with NBO parameters to find an explanation for the different strengths of intramol. hydrogen bonds in total charge transfer and second order stabilization energies.

Physical Chemistry Chemical Physics published new progress about Conformers. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, HPLC of Formula: 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ezzarrouqy, Kamal published the artcileStudy of the energetic, exergetic, and thermal balances of a solar distillation unit in comparison with a conventional system during the distillation of rosemary leaves, Quality Control of 124-76-5, the main research area is energetic exergetic thermal balance solar distillation rosemary leaf; Butane gas; Energy; Exergy; Rosemary; Solar distillation system; Steam line.

The solar energy produced by Scheffler parabola (10 m2) is not fully exploited by the solar distillation system of aromatic and medicinal plants. In this work, the optical losses in the primary and secondary reflectors, and the thermal losses at each part of this system (solar still, steam line, condenser) were determined A thermal energetic and exergetic anal. were also performed for a solar distillation system of rosemary leaves. For average intensity radiation of 849.1W/m2 and 6 Kg of rosemary leaves during 4 h of distillation, exergy and optical efficiencies of the system achieved up to 26.62% and 50.97%, resp. The thermal efficiency of the solar still, steam line, and condenser is about 94.80%, 94.30%, and 87.76%, resp. The essential oil yield per unit of consumed energy and the total efficiency of the solar distillation system, taking into account the heat losses in the solar still, steam line, and condenser, as well as the optical losses in the two reflectors, is 6.18 mL/ kWh and 40.00%, resp. The efficiency can be as high as 42.42% if the steam line is insulated. Moreover, the comparison between the solar steam distillation and conventional steam distillation shows that solar distillation is much more efficient since it gives better results and especially it avoids the emission of 12.10 kg of CO2 during extraction

Environmental Science and Pollution Research published new progress about Condensers. 124-76-5 belongs to class alcohols-buliding-blocks, name is rel-(1R,2R,4R)-1,7,7-Trimethylbicyclo[2.2.1]heptan-2-ol, and the molecular formula is C10H18O, Quality Control of 124-76-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Abakeviciene, Brigita published the artcileFree-standing composite films based on thiol-ene and PEDOT: PSS layers for optoelectronic applications, Category: alcohols-buliding-blocks, the main research area is poly ethylenedioxythiophene styrenesulfonate composite film optoelectronic application; PEDOT:PSS; PETMP-TTT; composite; free-standing film; layers; mechanical properties.

Free-standing composite films were fabricated by combining the plane parallel layers of thiol-ene based on pentaerythritol tetrakis(3-mercaptopropionate)-1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione (PETMP-TTT) UV curable polymer and poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) conductive polymer. A systematic anal. was performed with the focus on mech. performance of the free-standing composite films. The PEDOT:PSS/PETMPTTT composite exhibited higher values of adhesion force compared to the free-standing PETMP-TTT film due to hydrophilic nature of the PEDOT:PSS layer. The composite was found to be highly transparent in the range of 380-800 nm. The Young’s modulus and tensile strength of PETMP-TTT were found to be 3.6 ±0.4 GPa and 19± 3 MPa, while for PEDOT:PSS/PETMP-TTT to be 3.5± 0.3 GPa and 20± 3 MPa, resp. The sheet resistance values of the PEDOT:PSS layer in the composite film were found to be highly stable after a number of bending iterations with slight increase in sheet resistance from 108 to 118 ± 2 Ω/Ω. The resultant PEDOT:PSS/PETMP-TTT composite can be further used in optoelectronic applications.

Polymers (Basel, Switzerland) published new progress about Composites. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts