Category: alcohols-buliding-blocks

Ling, Xiangyang published the artcileMotion of Particles in a Monolayer Induced by Coalescing of a Bubble with a Planar Air-Water Interface, Application of n-Octanol, the main research area is glass microsphere coalescence bubble gas liquid interface.

The motion of particles in a monolayer induced by the coalescing of a bare bubble with a planar air-water interface was investigated in a modified Langmuir trough. Experiments were performed to understand the effect of particle hydrophobicity, subphase pH, packing d., the presence of a weak surfactant, and particle size distribution on the behavior of particle movement in the monolayer during the coalescence process. Video tracking software was used to track the particles and extract data based on the video footage. Visual inspection indicated that the coalescence of the bubble with the monolayer was a chaotic process which led the interface to oscillate to an extent that the particles underwent complete rearrangement. A simple anal. was carried out on the main forces involved in particle motion and rearrangement at the oscillating air-water interface. The motion characteristic of particles was evaluated by speed and mean-square displacement (MSD). The results showed that the butanol-treated particles had higher speed and MSD than the particles with a stronger affinity to the air-water interface. Similar results were also found at high subphase pH and low packing factor.

Langmuir published new progress about Bubbles. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Application of n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hori, Yohei published the artcileCombined effects of alcohol and electrolyte on mass transfer from single carbon-dioxide bubbles in vertical pipes, COA of Formula: C8H18O, the main research area is alc electrolyte mass transfer carbon dioxide bubble sodium chloride.

Mass transfer rates, kL, of single carbon-dioxide (CO2) bubbles rising through vertical pipes filled with alc.-electrolyte mixed aqueous solutions were measured to investigate the combined effects of alc. and electrolyte on kL. 1-octanol and 1-heptanol, which are known to adsorb to the interface and behave like surfactant, were used. Sodium chloride (NaCl) was used for the electrolyte. The surface tension, σ, decreased with increasing the NaCl concentrations, CN, while keeping the alc. concentration, CA, constant Three combinations of CA and CN having the same values of σ were selected for the exptl. conditions to avoid the effect of σ. The pipe diameters, D, were 12.5 and 18.2 mm. A wide range of bubble diameter covered various bubble shapes, i.e. ellipsoidal, cap, semi-Taylor and Taylor bubbles. The conclusions obtained are as follows: (1) the combination of CA and CN for the same σ does not affect the aspect ratios of ellipsoidal bubbles and the lengths, L, of Taylor bubbles, (2) the Sherwood numbers, Sh, of bubbles in alc.-NaCl mixed aqueous solutions depend on the combination of CA and CN due to the change in the Schmidt number, Sc, even at the same σ for all the tested combinations of concentrations of impurities, and (3) the modified Sherwood number, ShD, of contaminated Taylor bubbles is well correlated in terms of the bubble Reynolds number, Sc, the dimensionless group for surfactant properties and L/dT, where dT is the transition bubble diameter at the transition from the ellipsoidal-cap bubble regime to the transition regime.

International Journal of Heat and Mass Transfer published new progress about Bubbles. 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

Gomathi, V. published the artcileSupramolecular networks and Hirshfeld surfaces of oxydiacetic acid and iminodiacetic acid salts, Recommanded Product: 2,2′-Oxydiacetic acid, the main research area is supramol network Hirshfeld surfaces oxydiacetic acid iminodiacetic salt; Hirshfeld analysis; hydrogen bonding interactions; iminodiacetic acid; oxydiacetic acid.

Oxydiacetic acid (Oda) and iminodiacetic acid (Ida) have been combined with two diamines, namely ethylenediamine (en) and o-phenylenediamine (o-phen), to give three mol. crystals of compositions [(Oda2-)(en2+)]·H2O (Odaen), [(Ida-)(0.5en+)] (Idaen) and [(Oda-)(o-phen+)] (Odaophen). Single crystal X-ray structure determination of the three mol. salts revealed that the hydrogen bonding interactions form distinct supramol. chains. In Odaen, water mols. and Oda2- anions generate one-dimensional supramol. chains where two chains overlap each other in zigzag form. In Odaophen, Oda- anions generate a one-dimensional linear supramol. chain. In Idaen, both intermol. and intramol. proton transfer occurs. Ida- anions generate a one-dimensional zigzag chain. These one-dimensional supramol. chains extend to form different two-dimensional supramol. chains by the interaction of diaminium and monoaminium cations. Intermol. close contacts are also examined using Hirshfeld anal. to reveal similarities and differences in the crystal structures.

Acta Crystallographica, Section B: Structural Science, Crystal Engineering and Materials published new progress about Cations. 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

Shen, Dong-Yu published the artcileCharacterization of key odor-active compounds in pure chicken powder and the effect of yeast extract, using instrumental and sensory techniques, Application of 3-(Methylthio)propan-1-ol, the main research area is yeast extract gas chromatog olfactometry mass spectrometry.

Pure chicken powder (PCP) is a reliable source of mellow chicken soup flavor in seasoning, but it has some unstable compounds and is prone to lipid oxidation, which leads to unpleasant odor. Adding yeast extract (YE) can reduce the off-odor intensity of PCP. Based on the results of gas chromatog.-olfactometry-mass spectrometry (GC-O-MS), two-dimensional comprehensive gas chromatog.-olfactometry-mass spectrometry (GCxGC-O-MS) and combined aroma extract dilution anal. (AEDA), 14 key odor-active compounds were identified. Internal standard curve method was used for quant. anal., and the odor activity value (OAV) was calculated Octanal, 1-octen-3-ol and hexanal were found to be the most vital odor-active compounds in PCP. The odor-active compounds of YE were studied by the same method, and di-Me trisulfide was identified as the most important odor-active compound of YE. Addnl., recombination and omission experiments were carried out with PCP. Finally, it was found that a low concentration of di-Me trisulfide had masking effect on the odor of PCP.

Journal of Food Composition and Analysis published new progress about Chicken. 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Application of 3-(Methylthio)propan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hakamata, Yuki published the artcileDifferences in breast muscle mitochondrial respiratory capacity, reactive oxygen species generation, and complex characteristics between 7-week-old meat-and laying-type chickens, Quality Control of 97-67-6, the main research area is chicken meat reactive oxygen species breast muscle mitochondrial respiration; cardiolipin; carnitine palmitoyltransferase system; fatty acid oxidation; reactive oxygen species production; respiratory complex; respiratory supercomplex.

The skeletal muscle growth rate is a major feature differentiating meat- and laying-type chickens. A large amount of ATP is required during skeletal muscle synthesis, in which mitochondrial energy production capacities play a significant role. Addnl., mitochondria may participate in muscle protein degradation via reactive oxygen species generation. To investigate the differences in mitochondrial energetic characteristics between chickens exhibiting different growth rates, this study evaluated respiratory capacities in response to different types of respiratory substrate, protein abundances, assembly of individual respiratory complexes (I-V) and supercomplexes, and reactive oxygen species generation rates. These characteristics were compared between mitochondria from the breast muscle (M. pectoralis superficialis) of seven-week-old meat- and laying-type male chickens. Blue native polyacrylamide gel electrophoresis anal. revealed that meat-type chickens exhibited a significantly lower protein abundance of complex III (cytochrome bc1 complex), complex V (F0F1 ATP synthase), and total amount of supercomplexes than did laying-type chickens. There were no differences between chicken types in the respiration rate of mitochondria incubated with either pyruvate/malate or succinate, each of which drives complex I- and complex IIlinked respiration. Carnitine palmitoyltransferase-1-dependent and -independent respiration during ATP synthesis and carnitine palmitoyltransferase-2 enzymic activity were significantly lower in meat-type chickens than in layingtype chickens. For mitochondria receiving pyruvate/malate plus succinate, the reactive oxygen species generation rate and its ratio to the oxygen consumed (the percentage of free radical leak) were also significantly lower in meat-type chickens than in laying-type chickens. These results suggested that the mitochondrial energetic capacities of the breast muscle of meat-type chickens could be lower than those of laying-type chickens at seven weeks of age. Furthermore, the lower reactive oxygen species generation rate in meat-type chickens might have implications for rapid muscle development, which is possibly related to their lower muscle protein degradation rates.

Journal of Poultry Science published new progress about Chicken. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Quality Control of 97-67-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kopuncova, Maria published the artcileAroma stability and sensory aspects of commercially produced orange juice: gas chromatography-olfactometry study, Category: alcohols-buliding-blocks, the main research area is orange juice aroma stability sensory aspect gas chromatog olfactometry.

The effects of pasteurization and 4-mo storage on the aroma profile of orange juices with pulp that were fully processed and packed in inert nitrogen atm. were investigated within the span of 2 years (2018 and 2019). Headspace solid-phase microextraction, gas chromatog.-mass spectrometry, as well as gas chromatog. coupled to flame ionization detection and olfactometry, were used for extraction, and subsequent anal. of the odor-active volatiles. Observed changes in their odor intensity, including the formation of some off-flavors such as methional, furaneol, 4-vinylguaiacol and guaiacol, were not significant to that extent to lead to an evident worsening in the overall flavor of juices. Thus, the use of nitrogen atm. proved its ability to protect the organoleptic quality of juice from undesirable changes caused by oxidative load or acid-catalyzed reactions. Aroma profiles of fresh juices were considerably influenced by diverse climatic conditions, and different seasons of orange harvest in monitored years. Pasteurization and storage had lesser impact on the volatiles in 2018 as in 2019, probably due to the inter-annual variability in such parameters of juices as content of pulp and pH.

Chemical Papers published new progress about Climate. 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

Pasti, Alberto Pietro published the artcileHuman lactate dehydrogenase A undergoes allosteric transitions under pH conditions inducing the dissociation of the tetrameric enzyme, Safety of (S)-2-hydroxysuccinic acid, the main research area is human lactate dehydrogenase allosteric transition pH tetrameric enzyme; allosteric regulation; enzyme kinetics; lactate dehydrogenase; lactic acid; liver.

The aerobic energetic metabolism of eukaryotic cells relies on the glycolytic generation of pyruvate, which is subsequently channelled to the oxidative phosphorylation taking place in mitochondria. However, under conditions limiting oxidative phosphorylation, pyruvate is coupled to alternative energetic pathways, e.g. its reduction to lactate catalyzed by lactate dehydrogenases (LDHs). This biochem. process is known to induce a significant decrease in cytosolic pH, and is accordingly denoted lactic acidosis. Nevertheless, the mutual dependence of LDHs action and lactic acidosis is far from being fully understood. Using human LDH-A, here we show that when exposed to acidic pH this enzyme is subjected to homotropic allosteric transitions triggered by pyruvate. Conversely, human LDH-A features Michaelis-Menten kinetics at pH values equal to 7.0 or higher. Further, citrate, isocitrate, and malate were observed to activate human LDH-A, both at pH 5.0 and 6.5, with citrate and isocitrate being responsible for major effects. Dynamic light scattering (DLS) experiments revealed that the occurrence of allosteric kinetics in human LDH-A is mirrored by a consistent dissociation of the enzyme tetramer, suggesting that pyruvate promotes tetramer association under acidic conditions. Finally, using the human liver cancer cell line HepG2 we isolated cells featuring cytosolic pH equal to 7.3 or 6.5, and we observed a concomitant decrease in cytosolic pH and lactate secretion. Overall, our observations indicate the occurrence of a neg. feedback between lactic acidosis and human LDH-A activity, and a complex regulation of this feedback by pyruvate and by some intermediates of the Krebs cycle.

Bioscience Reports published new progress about Cytosol. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Safety of (S)-2-hydroxysuccinic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Eriksen, Peter Lykke published the artcileNon-alcoholic fatty liver disease causes dissociated changes in metabolic liver functions, Synthetic Route of 59-23-4, the main research area is metabolism non alc fatty liver disease; Aminopyrine; Hepatic elimination; Indocyanine green; Liver function tests; Non-alcoholic steatohepatitis; Urea cycle.

Background: Non-alc. fatty liver disease (NAFLD) is a major health concern affecting 25% of the world’s population. It is generally held that a fatty liver does not influence liver function, but quant. measurements of metabolic liver functions have not been systematically performed. We aimed to study selected hepatocellular metabolic functions in patients with different stages of NAFLD. Methods: Twenty-five non-diabetic, biopsy-proven NAFLD patients [12 with simple steatosis; 13 with non-alc. steatohepatitis (NASH)] and ten healthy controls were included in a cross-sectional study. Hepatocyte cytosolic function was assessed by the galactose elimination capacity (GEC), mitochondrial-cytosolic metabolic capacity by the functional hepatic nitrogen clearance (FHNC), microsomal function by the aminopyrine breath test, and excretory liver function by indocyanine green (ICG) elimination. Results: GEC was 20% higher in NAFLD than in controls [3.15 mmol/min (2.9-3.41) vs. 2.62 (2.32-2.93); P = 0.02]. FHNC was 30% lower in NAFLD [23.3 L/h (18.7-28.9) vs. 33.1 (28.9-37.9); P = 0.04], more so in simple steatosis [19.1 L/h (13.9-26.2); P = 0.003] and non-significantly in NASH [27.9 L/h (20.6-37.8); P = 0.19]. Aminopyrine metabolism was 25% lower in simple steatosis [8.9% (7.0-10.7)] and 50% lower in NASH [6.0% (4.5-7.5)] than in controls [11.9% (9.3-12.8)] (P < 0.001). ICG elimination was intact. Conclusions: The hepatocellular metabolic functions were altered in a manner that was dissociated both by different effects on different liver functions and by different effects of different stages of NAFLD. Thus, NAFLD has widespread consequences for metabolic liver function, even in simple steatosis. Clinics and Research in Hepatology and Gastroenterology published new progress about Cytosol. 59-23-4 belongs to class alcohols-buliding-blocks, name is (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal, and the molecular formula is C6H12O6, Synthetic Route of 59-23-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Camacho Vergara, Edgar L. published the artcileOn the study of the vapor-liquid interface of associating fluids with classical density functional theory, SDS of cas: 111-87-5, the main research area is vapor liquid interface density functional theory.

Classical d. functional theory (DFT) is applied to study the vapor-liquid interface of associating fluids. Our classical DFT implementation uses a Helmholtz free energy functional that reduces to the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state in the bulk limit. We apply a new association functional, presented in one of our previous works, based on the weighted d. approximation to calculate the interfacial tension of associating fluids and compare them with two of the most used association functionals from literature. It is found that classical DFT with the three association functionals and the current mol. parameters of PC-SAFT is not able to predict satisfactorily the interfacial tension of alkanols. Therefore, the exptl. interfacial tension of alkanols and some associating fluids is included in the determination of the pure mol. parameters of PC-SAFT. With this approach the determination of interfacial tension of pure associating fluids can be greatly improved with the new parameters, but at the expense of slightly higher deviations in the vapor pressure. The new parameters are tested for the determination of vapor-liquid equilibrium (VLE) and the prediction of interfacial tension of binary mixtures containing at least one associating compound Good agreement is found between exptl. data of VLE and interfacial tension of the binary mixtures and the three association functionals. Furthermore, we discuss about the limitations and capabilities of the current classical DFT implementation in the study of the vapor-liquid interface of associating fluids.

Fluid Phase Equilibria published new progress about Density. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, SDS of cas: 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kumar, Anuj published the artcileExtractive separation of levulinic acid using natural and chemical solvents, Name: n-Octanol, the main research area is extractive separation levulinic acid natural chem solvent.

Levulinic acid is an organic compound which has been replacing petroleum products in different sectors such as biofuel and chem. industry. It can be used in the manufacture of plastics, rubber, pharmaceuticals, pesticides, etc. Levulinic acid separation from aqueous streams, different types of solvents such as natural solvents (sunflower and groundnut oil), and various chem. solvents (benzene, iso-butanol, and iso-octanol) at 298.15 K were used. Using equilibrium data various parameters such as: efficiency of extraction, distribution coefficient, dimerization constant, and partition coefficient were calculated and correlated with typical physicochem. properties, mol. weight, d., dipole moment, viscosity, dielec. constant, solubility in water, octanol-water partition coefficient, refractive index, etc. The obtained exptl. extraction results for separation of levulinic acid were compared with various solvents used. The maximum value of distribution coefficient and efficiency of extraction of levulinic acid was obtained for iso-butanol (1.357, 57.276%) and min. value for sunflower oil (0.077, 7.086%) resp.

Chemical Data Collections published new progress about Density. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Name: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts