Category: 584-02-1

Sen, Kemal published the artcileThe influence of different commercial yeasts on aroma compounds of rose wine produced from cv. Okuezgozue grape, Application of 3-Pentanol, the main research area is com yeast Okuezgozue grape rose wine aroma compound.

In this study, the effects of the use of different com. yeasts on the aroma compounds of rose wines produced from Okuezgozue grape grown in Turkey were investigated. For this purpose, three different wines have been produced through spontaneous fermentation and using com. yeasts (NBY17 and Zymaflore X5). The aroma compounds were isolated using the liquid-liquid extraction method. These compounds were identified and quantified using the GC-MS-FID. The total amount of aroma compounds was found 150,749.4μg/L in spontaneous wine, 170,681.6μg/L in wine using NBY17, and 162,623.1μg/L in wine using Zymaflore X5. The most dominant aroma groups in wines were higher alcs. and esters. In general, NBY17 has been found to play an important role in the formation of pleasing aromatic compounds in wine both in terms of aroma formation and sensory properties. This study provided the first data on the formation ability of aroma compounds for NBY17 yeast. Many wineries today use com. yeasts because of their ability to start fermentation directly, convert sugar to alc. greatly, and produce wine with the desired properties, as well as producing small amounts of undesirable byproducts. This study which was performed using Zymaflore X5 and NBY17 among these com. yeasts was focused on the differences in the aroma compounds of rose wines obtained from Okuezgozue grapes. With this study, the first data on the ability of com. wine yeast called NBY17 produced in Turkey to form aroma compounds was provided. The use of com. yeast significantly influenced the amounts of aroma compounds in wines and the com. yeast called NBY17 plays an important role in the formation of pleasing aroma compounds in wine.

Journal of Food Processing and Preservation published new progress about Acidity. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Application of 3-Pentanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Du, Xiaofen published the artcileAssociation of Refreshing Perception with Volatile Aroma Compounds, Organic Acids, and Soluble Solids in Freshly Consumed Cucumber Fruit, Computed Properties of 584-02-1, the main research area is cucumber fruit aroma compound organic acid soluble solid.

Refreshing is a multidimensional concept for the response to a food consumption experience, especially for drinks. The consumer has daily needs for refreshing; however, the perception of refreshing and the associated food sensory quality and mol. composition are underexplored. This study aimed to (1) use a consumer study to evaluate the refreshing perception of eight cucumber varieties, (2) identify volatile aroma and nonvolatile taste compounds in cucumber with instrumental anal., and (3) explore the potential correlation between refreshing perception and aroma- and taste-related compounds using statistical anal. The cucumber consumer study (n = 103) showed that cucumbers were perceived as refreshing in general (intensities 3.3-5.4, 0-10 line scale). The anal. of volatiles with solid-phase microextraction-gas chromatog.-mass spectrometry (SPME-GC-MS) identified 155 volatiles. Aldehydes and alcs. were the most dominant, accounting for 25.5%-77.9% and 15.0%-58.1%, resp. Soluble solids and three organic acids were quantified in the eight cucumber varieties using a refractometer and high-performance liquid chromatog. (HPLC), resp. Cucumber variety differences in these variables (volatiles, organic acids, and soluble solids) were significant (p ≤ 0.05). Compounds associated with refreshing perception were investigated using partial least-squares (PLS) regression, and refreshing perception was highly correlated with aldehydes (mainly C6 and C9 aldehydes), organic acid, and soluble solids. The findings would bring in a new potential use of cucumber, especially when the food industry is interested in developing products perceived as refreshing with natural flavorings.

ACS Food Science & Technology published new progress about Cucumber. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Computed Properties of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Phillips, Robert published the artcileIncorporating use phase chemical leaching and water quality testing for life cycle toxicity assessment of cross-linked polyethylene (PEX) piping, Formula: C5H12O, the main research area is polyethylene piping chem leaching water quality testing.

Life cycle assessment (LCA) is increasingly being considered in material selection decisions for residential drinking water piping, but chem. leaching during the use phase has typically been excluded, even though the delivery of safe water is the core function of water distribution infrastructure. We have quantified the contribution of leached organics to life cycle human toxicity of piping materials through the integration of empirical leaching data within LCA. Eight cross-linked polyethylene (PEX) pipe brands were examined Upstream emissions from PEX pipe production were combined with empirical total organic carbon (TOC) data from leaching tests for new pipes. The total mass of organic contaminants ingested over the pipe′s lifetime was estimated by fitting leaching data with kinetic models and integrating leaching concentrations and daily water use over time, rather than using an initial concentration that does not accurately depict actual lifetime exposures. Potential human toxicity from use phase ingestion was evaluated using a range of human effect factors from the consensus USEtox model to create plausible bounds of toxicity through different exposure and effect scenarios. New non-carcinogenic human toxicol. effect factors were derived for approx. half of the 62 leached organic compounds identified. Results indicate that potential human toxicity from upstream pipe production generally exceeds use phase toxicity, but that leached contaminants can be a substantial contributor to overall life cycle toxicity, depending on the PEX brand, particularly for carcinogenic effects. Deleterious effects can be reduced both by thorough system flushing after initial installation and periods of stagnation, but also through improvements in manufacturing processes that reduce upstream emissions. The bounding approach demonstrates a viable method for considering water quality in LCA when comprehensive characterization and concentration data are not available.

Science of the Total Environment published new progress about Leaching. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Formula: C5H12O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sun, Tong published the artcileFreezing of Dilute Aqueous-Alcohol Nanodroplets: The Effect of Molecular Structure, Category: alcohols-buliding-blocks, the main research area is freezing alc nanodroplet mol structure property relationship.

We investigate vapor-liquid nucleation and subsequent freezing of aqueous-alc. nanodroplets containing 1-pentanol, 1-hexanol, and their 3-isomers. The aerosols are produced in a supersonic nozzle, where condensation and freezing are characterized by static pressure and Fourier transform IR (FTIR) spectroscopy measurements. At fixed water concentrations, the presence of alc. enables particle formation at higher temperatures since both the equilibrium vapor pressure above the critical clusters and the cluster interfacial free energy are decreased relative to the pure water case. The disappearance of a small free OH peak, observed for pure water droplets, when alcs. are added and shifts in the CH peaks as a function of alc. chain length reveal varying surface partitioning preferences of the alcs. Changes in the FTIR spectra during freezing, as well as changes in the ice component derived from self-modeling curve resolution anal., show that 1-hexanol and 1-pentanol perturb freezing less than their branched isomers do. This behavior may reflect the mol. footprints of the alcs., the available surface area of the droplets, and not only alc. solubility The presence of alcs. also lowers the freezing temperature relative to that of pure water, but when there is clear evidence for the formation of ice, the ice nucleation rates change by less than a factor of ~2-3 for all cases studied.

Journal of Physical Chemistry B published new progress about Clusters. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wu, Haijun published the artcilePromoting the conversion of poplar to bio-oil based on the synergistic effect of alkaline hydrogen peroxide, Application of 3-Pentanol, the main research area is bio oil conversion synergistic effect alk hydrogen peroxide.

The synergistic catalysis effect of NaOH and H2O2 on the hydrothermal liquefaction (HTL) of poplar was investigated and compared to the NaOH or H2O2 catalyzed HTL at different temperatures and 30 min residence time. GC-MS, GPC, FT-IR, HPLC and TGA were used to comprehensively characterize the phys. and chem. properties of liquefied products (bio-oil, lignin and solid residue). The results showed that the highest total bio-oil yield (70.65%) was obtained at 280°C with NaOH (35 g/L)/H2O2 (30 g/L) as catalysts. The average mol. weight and polydispersity index (PDI) were found to be lower compared to that from other conditions. As the NaOH concentration was increased, the bio-oil yield was improved. The concentration of H2O2 for the optimal synergistic effect was observed to be 30 g/L. GC-MS anal. showed that the bio-oil obtained by NaOH (35 g/L)/H2O2 (30 g/L) was characterized with the lowest N content. The synergistic effect promoted the higher production selectivity of o-xylene and p-xylene in the bio-oil.

Renewable Energy published new progress about Catalysis. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Application of 3-Pentanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Antony, Binu published the artcilePheromone receptor of the globally invasive quarantine pest of the palm tree, the red palm weevil (Rhynchophorus ferrugineus), Formula: C5H12O, the main research area is Rhynchophorus ferrugineus pheromone receptor palm tree; Rhynchophorus ferrugineus ; aggregation pheromone; deorphanization; pheromone receptor; red palm weevil.

Palm trees are of immense economic, sociocultural, touristic, and patrimonial significance all over the world, and date palm-related knowledge, traditions, and practices are now included in UNESCOs list of the Intangible Cultural Heritage of Humanity. Of all the pests that infest these trees, the red palm weevil (RPW), Rhynchophorus ferrugineus (Olivier), is its primary enemy. The RPW is a category-1 quarantine insect pest that causes enormous economic losses in palm tree cultivation worldwide. The RPW synchronizes mass gathering on the palm tree for feeding and mating, regulated by a male-produced pheromone composed of two methyl-branched compounds, (4RS, 5RS)-4-methylnonan-5-ol (ferrugineol) and 4(RS)-methylnonan-5-one (ferrugineone). Despite the importance of odorant detection in long-range orientation towards palm trees, palm colonization, and mating, the pheromone receptor has not been identified in this species. In this study, we report the identification and characterization of the first RPW pheromone receptor, RferOR1. Using gene silencing and functional expression in Drosophila olfactory receptor neurons, we demonstrate that RferOR1 is tuned to ferrugineol and ferrugineone and binds five other structurally related mols. We reveal the lifetime expression of RferOR1, which correlates with adult mating success irresp. of age, a factor that could explain the wide distribution and spread of this pest. As palm weevils are challenging to control based on conventional methods, elucidation of the mechanisms of pheromone detection opens new routes for mating disruption and the early detection of this pest via the development of pheromone receptor-based biosensors.

Molecular Ecology published new progress about Arecaceae. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Formula: C5H12O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chang, Chaoyi published the artcileClassification of biomass reactions and predictions of reaction energies through machine learning, Quality Control of 584-02-1, the main research area is methanol propionic acid gas phase reaction energy.

Elementary steps and intermediate species of linearly structured biomass compounds are studied. Specifically, possible intermediates and elementary reactions of 15 key biomass compounds and 33 small mols. are obtained from a recursive bond-breaking algorithm. These are used as inputs to the unsupervised Mol2Vec algorithm to generate vector representations of all intermediates and elementary reactions. The vector descriptors are used to identify sub-classes of elementary steps, and linear discriminant anal. is used to accurately identify the reaction type and reduce the dimension of the vectors. The resulting descriptors are applied to predict gas-phase reaction energies using linear regression with accuracies that exceed the commonly employed group additivity approach. They are also applied to quant. assess model compound similarity, and the results are consistent with chem. intuition. This workflow for creating vector representations of complex mol. systems requires no input from electronic structure calculations, and it is expected to be applicable to other similar systems where vector representations are needed. (c) 2020 American Institute of Physics.

Journal of Chemical Physics published new progress about Algorithm. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Quality Control of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Qiu, Jiaqi published the artcileRecyclable DMAP-Functionalized polymeric nanoreactors for highly efficient acylation of alcohols in aqueous systems, Synthetic Route of 584-02-1, the main research area is DMAP functionalize block copolymer preparation thermal stability; alc anhydride heterogeneous catalyst acylation green chem; ester preparation.

In this study, small-mol. catalysts 4-(N,N-dimethylamino)pyridine (DMAP) functionalized nanoreactors were constructed by self-assembly of amphiphilic block copolymers with DMAP moieties in the hydrophobic block, leading to heterogeneous catalysts with excellent dispersity in water. The key preparation route included reversible addition-fragmentation chain transfer (RAFT) polymerization of 2-(N-methyl-N-(4-pyridyl)amino)ethyl methacrylate (MAPMA) and Me methacrylate (MMA) using poly (oligomeric (ethylene glycol) Me ether methacrylate) (POEGMA) as a hydrophilic macromol. RAFT reagent. The characterization by dynamic light scattering (DLS) and transmission electron microscopy (TEM) shows that the nanoreactors possess a core-shell nanostructure with the diameter of around 110 nm. The resulting polymeric nanoreactors showed excellent catalytic activity for acylation of alcs. in water. High conversion of a variety of alc. (>99%) and excellent product selectivity were achieved. The high catalytic efficiency of the nanoreactors may be attributed to the enhancement of the interaction between the reactant and the catalyst in the confined hydrophobic space, which simulates how enzymes usually work. Moreover, the catalyst was easily recovered by thermoresponsive separation and reused with high activity for more than 5 cycles. This study presents an efficient approach to achieve green catalytic reactions which were normally incompatible to aqueous conditions, potentially applicable to other catalytic systems such as metal-mediated organic transformations.

Polymer published new progress about Acylation. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Synthetic Route of 584-02-1.

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

Cai, Cheng published the artcileComparison of Two Acid Hydrotropes for Sustainable Fractionation of Birch Wood, Safety of 3-Pentanol, the main research area is acid hydrotrope sustainable birch wood; acid recovery; cellulose nanofibrils; esterification; lignin; maleic acid.

This study reports on a comparative study of acid hydrotropic fractionation (AHF) of birch wood using maleic acid (MA) and p-toluenesulfonic acid (p-TsOH). Under the same level of delignification, lignin dissolved by MA is much less condensed with a higher content of ether aryl β-O-4 linkages. Lignin depolymerization dominated in MA hydrotropic fractionation (MAHF) and resulted in a single lower mol. weight peak, in contrast to the competitive depolymerization and repolymn. in p-TsOH AHF with a bimodal distribution. The less condensed MA-dissolved lignin facilitated catalytic conversion to monophenols. Carboxylation of residual lignin in fractionated cellulosic water-insoluble solids (WISs) enhanced enzymic saccharification by decreasing nonproductive cellulase binding to lignin. At a low cellulase loading of 10 FPU g-1 glucan, saccharification of WIS-MT120 from MAHF at 120°C was 95% compared with 48% for WIS-PT85 from p-TsOH AHF at 85°C under the same level of delignification of 63%. Residual lignin carboxylation also facilitated nanofibrillation of WIS for producing lignin-containing cellulose nanofibrils (LCNFs) through an enhanced lignin lubrication effect, which substantially decreases fibrillation energy. LCNFs from only one pass of microfluidization of WIS-MT120 have the same morphol. as those from WIS-PT85 after three passes. MA also has a lower solubility and higher minimal hydrotropic concentration, which facilitated acid recovery. MA is U. S. Food and Drug Administration (FDA)-approved as an indirect food additive, affording significant advantages compared with p-TsOH for biorefinery applications.

ChemSusChem published new progress about Birch wood. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Safety of 3-Pentanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts