Category: 111-87-5

Wiertel-Pochopien, Agata published the artcileSynergistic Effect of Binary Surfactant Mixtures in Two-Phase and Three-Phase Systems, Application In Synthesis of 111-87-5, the main research area is synergistic effect binary surfactant mixture phase.

Cationic alkyltrimethylammonium bromides (CnTAB, with n = 8, 12, 16, 18) and their mixtures with n-octanol as a nonionic surfactant were chosen as a model system to study the synergistic effect on foamability (two-phase system) and floatability (three-phase system) of quartz in the presence of binary mixtures of ionic/nonionic surfactants. The foam height of one-component solutions and binary mixtures and floatability of quartz particles were characterized as a function of the surfactant concentration and the number of carbons (n) in the alkyl chain of CnTAB. The exptl. results of foamability and floatability measurements in one-component and mixed solutions revealed the synergistic effect, causing a significant enhancement in the foam height and recovery of quartz. In the presence of n-octanol, the height of foam increased remarkably for all CnTAB solutions studied, and this effect, whose magnitude depended on the CnTAB hydrophobic tail length, could not be justified by a simple increase in total surfactant concentration A similar picture was obtained in the case of flotation response. The mechanism of synergistic effect observed in mixed CnTAB/n-octanol solutions was proposed. The discussion was supported by mol. dynamics simulations, and the probable mechanism responsible for synergism was discussed. In addition, an anal. allowing accurate determination of the concentration regimes, where the synergistic effect can be expected, was given. It was shown that for the two-phase system, the n-octanol mol. preadsorption at the liquid/gas interface causes an increase in CnTAB adsorption coverage over the level expected from its equilibrium value in the one-component solution In the case of the three-phase system, the synergistic effect was related to the ionic surfactants serving as an anchor layer for n-octanol, which, in water/n-octanol solution (one-component system), do not adsorb on the surface of quartz.

Journal of Physical Chemistry B published new progress about Flotation. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Application In Synthesis of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Romero, Concepcion published the artcilePacking black ripe olives in acid conditions, Computed Properties of 111-87-5, the main research area is oxygen permeability lipid oxidation pentnal black ripe olive; Acid; Black ripe olive; Lipid oxidation; Oxygen; Packing.

The type of container (airtight and pouches with different O2 permeability) and packing conditions (cover brine, air or N2 atm) has been studied to preserve black ripe olives in acid medium for a year. Unlike the traditional sterilized product, these acidified olives only needed pasteurization to assure its microbial safety, the absence of acrylamide being an addnl. advantage. Surprisingly, an increase in the oxygen diffusion through the films (i) faded the black color of the olives, (ii) softened the fruit that lost around 33% of its initial firmness in only 6 mo, and (iii) produced the lipids oxidation forming volatile compounds that transmitted an abnormal flavor which tasters identified as rancid. Therefore, ripe olives in acid medium must be packed in airtight containers such as glass jars, cans o metallic pouches with cover brine or N2 atm. The addition of calcium is recommended to avoid olive softening.

Food Chemistry published new progress about Lethality. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Computed Properties of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Badiee, Hamid published the artcileHollow fiber liquid-phase microextraction based on the use of a rotating extraction cell: A green approach for trace determination of rhodamine 6G and methylene blue dyes, Synthetic Route of 111-87-5, the main research area is rhodamine methylene blue rotating extraction cell HF LPME; Cosmetic products; Eco-scale; Environmental waters; Microextraction; Soft drink; Synthetic dyes.

In this work, a novel mode of hollow fiber liquid-phase microextraction (HF-LPME) technique namely rotating extraction cell solvent bar microextraction (REC-SBME) was introduced. The proposed method was applied for the preconcentration of methylene blue (MB) and rhodamine 6G (RG) in some real samples, including soft drink, lipstick, environmental water, and wastewater samples. In the extraction setup, two pieces of hollow fibers were fixed on a mech. support and immersed in a rotating extraction cell containing the sample solution during the extraction process. The rotation of the extraction cell by using an elec. motor led to an enhancement in the mass transfer of the dyes from the sample solution into the organic acceptor phase. In the developed procedure, the UV-Vis spectrophotometry and HPLC-UV/Vis were employed as detection methods for the anal. of the acceptor phase and the obtained results were compared. Optimization of the extraction factors affecting the method, including organic solvent type, sample solution pH, extraction time, rotational rate, the volume of sample and acceptor solutions, salt addition, and temperature was performed in order to obtain the best preconcentration factor. Linear dynamic range obtained by HPLC-UV/Vis and spectrophotometry was observed in the ranges of 2.5-1200 ng mL-1 for RG and 1.6-600 ng mL-1 for MB with R2 more than 0.9971. Also, relative standard deviation (RSD) values (n = 3) less than 3.8% were obtained. The good conformity of the obtained results makes UV-Vis spectrophotometric method an ideal tool for routine anal. of trace dyes in the complex matrixes after REC-SBME.

Environmental Pollution (Oxford, United Kingdom) published new progress about Beverages. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Synthetic Route of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Li, Zhengxin published the artcileGrowth Rates of Hydrogen Microbubbles in Reacting Femtoliter Droplets, Computed Properties of 111-87-5, the main research area is growth rate hydrogen microbubble reaction femtoliter droplet.

Chem. reactions in small droplets are extensively explored to accelerate the discovery of new materials and increase the efficiency and specificity in catalytic biphasic conversion and high-throughput analytics. In this work, we investigate the local rate of the gas-evolution reaction within femtoliter droplets immobilized on a solid surface. The growth rate of hydrogen microbubbles (�00 nm in radius) produced from the reaction was measured online with high-resolution confocal microscopic images. The growth rate of bubbles was faster in smaller droplets and near the droplet rim in the same droplet. The results were consistent for both pure and binary reacting droplets and on substrates of different wettability. Our theor. anal. based on diffusion, chem. reaction, and bubble growth predicted that the concentration of the reactant depended on the droplet size and the bubble location inside the droplet, in good agreement with exptl. results. Our results reveal that the reaction rate may be spatially nonuniform in the reacting microdroplets. The findings may have implications for formulating the chem. properties and uses of these droplets.

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

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Liu, Zhu published the artcileAn octanol hinge opens the door to water transport, Recommanded Product: n-Octanol, the main research area is octanol water transport phase boundary.

Despite their prevalent use as a surrogate for partitioning of pharmacol. active solutes across lipid membranes, the mechanism of transport across water/octanol phase boundaries has remained unexplored. Using mol. dynamics, graph theor., cluster anal., and Langevin dynamics, we reveal an elegant mechanism for the simplest solute, water. Self-assembled octanol at the interface reversibly binds water and swings like the hinge of a door to bring water into a semi-organized second interfacial layer (a “”bilayer island””). This mechanism is distinct from well-known lipid flipping and water transport processes in protein-free membranes, highlighting important limitations in the water/octanol proxy. Interestingly, the collective and reversible behavior is well-described by a double well potential energy function, with the two stable states being the water bound to the hinge on either side of the interface. The function of the hinge for transport, coupled with the underlying double well energy landscape, is akin to a mol. switch or shuttle that functions under equilibrium and is driven by the differential free energies of solvation of H2O across the interface. This example successfully operates within the dynamic motion of instantaneous surface fluctuations, a feature that expands upon traditional approaches toward controlled solute transport that act to avoid or circumvent the dynamic nature of the interface.

Chemical Science published new progress about Algorithm. 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

Qian, Jie published the artcilePredictive and explanatory themes of NOAEL through a systematic comparison of different machine learning methods and descriptors, Safety of n-Octanol, the main research area is machine learning NOAEL food additive cosmetic; Cheminformatics; Food additives; Machine learning; NOAEL; Sub-chronic; Toxicity.

No observed adverse effect level (NOAEL) is an identified dose level which used as a point of departure to infer a safe exposure limit of chems., especially in food additives and cosmetics. Recently, in silico approaches have been employed as effective alternatives to determine the toxicity endpoints of chems. instead of animal experiments Several acceptable models have been reported, yet assessing the risk of repeated-dose toxicity remains inadequate. This study established robust machine learning predictive models for NOAEL at different exposure durations by constructing high-quality datasets and comparing different kinds of mol. representations and algorithms. The features of mol. structures affecting NOAEL were explored using advanced cheminformatics methods, and predictive models also communicated the NOAEL between different species and exposure durations. In addition, a NOAEL prediction tool for chem. risk assessment is provided. We hope this study will help researchers easily screen and evaluate the subacute and sub-chronic toxicity of disparate compounds in the development of food additives in the future.

Food and Chemical Toxicology published new progress about Algorithm. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Safety of n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hero, Eirik H. published the artcileDetermination of Breakage Parameters in Turbulent Fluid-Fluid Breakage, COA of Formula: C8H18O, the main research area is breakage particle turbulent fluid size distribution oil droplet.

Numerous sets of single-particle breakage experiments are required to provide a sufficient database for improving the modeling of fluid particle breakage mechanisms. This work focuses on the interpretation of the phys. breakage events captured on video. To extract the necessary information required for modeling the mechanisms of the fluid particle breakage events in turbulent flows, a well-defined image anal. procedure is necessary. Two breakage event definitions are considered, namely, initial breakup and cascade breakup. The reported breakage time, the number of daughter particles created, and the daughter size distribution are significantly affected by the definition used. For each breakage event definition, an image anal. procedure is presented.

Chemical Engineering & Technology published new progress about Algorithm. 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

Fang, L. published the artcileHighly selective Ru/HBEA catalyst for the direct amination of fatty alcohols with ammonia, COA of Formula: C8H18O, the main research area is ruthenium HBEA catalyst amination fatty alc ammonia.

The present study describes the synthesis of primary amines from long-chain fatty alcs. and ammonia using supported ruthenium catalysts over different acid supports, including a variety of zeolites with different topologies and Si/Al ratios. The morphol., acidity and location of ruthenium in the catalysts was studied in detail by combining XRD, BET, HR-TEM, NH3-TPD, octylamine-TPD, H2-TPR, XPS, EXAFS / XANES, 27Al MAS NMR and TGA. In particular, Ru/HBEA (Si/Al = 25) with 5 wt% Ru afforded more than 90% conversion and 90% selectivity to 1-octylamine in the liquid-phase amination reaction of 1-octanol with ammonia at 180°C in a batch reactor. The high selectivity of Ru/HBEA (Si/Al = 25) can be explained by the presence of Bronsted / Lewis acid centers with medium strength in the proximity of ruthenium nanoparticles. The catalyst was further tested in a pre-pilot continuous stirred-tank reactor (2 L) with flash separation of 1-octylamine. In this configuration, a steady 92% selectivity of octylamine was obtained at 87% 1-octanol conversion during 120 h on steam. The catalyst kept its integrity during the reaction.

Applied Catalysis, B: Environmental published new progress about Amination. 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

Niu, Feng published the artcileA multifaceted role of a mobile bismuth promoter in alcohol amination over cobalt catalysts, Application of n-Octanol, the main research area is alumina supported bismuth promoted cobalt catalyst alc amination.

Promotion with small amounts of different elements is an efficient strategy for the enhancement of the performance of many heterogeneous catalysts. Supported cobalt catalysts exhibit significant activity in the synthesis of primary amines via alc. amination with ammonia, which is an economically efficient and environmentally friendly process. Insufficient selectivity to primary amines, low activity and fast cobalt catalyst deactivation remain serious issues restricting the application of alc. amination in the industry. In this work, we have discovered the multifaceted role of the bismuth promoter, which is highly mobile under reaction conditions, in 1-octanol amination over supported cobalt catalysts. First, the overall reaction rate was enhanced more than twice on promotion with bismuth. Second, the selectivity to primary amines increased 6 times in the presence of Bi at high alc. conversion. Finally, the bismuth promotion resulted in extremely high stability of the cobalt catalyst. Characterization by XRD, temperature programmed reduction, STEM, CO chemisorption, BET, TGA and FTIR has showed that the enhancement of the catalytic performance on promotion with bismuth is due to better cobalt reducibility, easy removal of strongly adsorbed intermediates and products by the mobile promoter and suppression of amine coupling reactions resulting in secondary and tertiary amines.

Green Chemistry published new progress about Amination. 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

Ibanez, J. published the artcileDirect amination of 1-octanol with NH3 over Ag-Co/Al2O3: Promoting effect of the H2 pressure on the reaction rate, Product Details of C8H18O, the main research area is silver cobalt alumina ammonia octanol direct amination reaction rate.

The kinetics of the direct gas-phase amination reaction of 1-octanol with ammonia was studied over a Ag-Co/Al2O3 catalyst. An exhaustive exptl. dataset was acquired on a Flowrence unit using a full factorial exptl. design, covering the effect and interactions of the 1-octanol, ammonia and hydrogen partial pressures in the range 160-180 °C. An apparent zero order was obtained for both reactants (i.e. 1-octanol and NH3), addressing alc. dehydrogenation as the rate-determining step of the overall catalytic process. Most interestingly, a non-trivial pos. effect of the exogeneous H2 pressure was observed on the 1-octanol conversion, also favoring the formation of the secondary amine. To unveil the promoting role of H2 on the reaction rate, a comprehensive kinetic modeling study was carried out. Based on the observed exptl. trends, various kinetic models were proposed relying on an in situ catalytic deactivation-regeneration mechanism of the catalyst surface. Upon statistical discrimination, a robust kinetic model could be obtained, pointing out the adsorbed octylimine intermediate as the most plausible source of deactivation. The kinetic model afford an excellent description of the observed exptl. trends at both low and high 1-octanol conversion and provides a sound mechanistic explanation accounting for the unexpected role of H2 on alc. amination reactions.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Amination. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Product Details of C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts