Month: December 2022

Lan, Yi-Bin published the artcileCharacterization and differentiation of key odor-active compounds of ‘Beibinghong’ icewine and dry wine by gas chromatography-olfactometry and aroma reconstitution, Application In Synthesis of 505-10-2, the main research area is icewine aroma gas chromatog olfactometry; Aroma reconstitution; GC-O; Icewine; PLSR; Quantitative descriptive analysis; ‘Beibinghong’.

Freezing-thawing events contribute to the unique aroma profile of icewines. Differences in key odor-active volatile compounds between ‘Beibinghong’ (Vitis amurensis × V. vinifera) icewines and dry wines were investigated by gas chromatog.-olfactometry and gas chromatog.-mass spectrometry. Acceptable agreement between the olfactometric and quant. results was obtained. ‘Beibinghong’ icewine was characterized by high concentrations of volatile phenols, lactones, (E)-β-damascenone, and phenylacetaldehyde, which were associated with on-vine freezing-thawing events in grape. Low concentrations of higher alc. acetates and Et esters of fatty acids were attributed to hyperosmotic stress during fermentation The overall aroma of icewine could be mimicked by reconstitution containing 44 identified volatiles. Partial least squares regression anal. demonstrated that the concentrations of these volatile compounds determined the distinct sensory profiles of icewines, which have higher intensities of honey/sweet, smoky, caramel, dried fruit, apricot/peach, and floral aromas, and lower intensities of fresh fruity and herbaceous notes in comparison with dry wines.

Food Chemistry published new progress about Wine analysis. 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Application In Synthesis of 505-10-2.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Parpinello, Giuseppina Paola published the artcileComparison of Sangiovese wines obtained from stabilized organic and biodynamic vineyard management systems, Synthetic Route of 505-10-2, the main research area is Sangiovese wine organic biodynamic vineyard management; Bioactive compounds; Biodynamic; Organic; Sensory evaluation; Volatiles compounds; Wine sustainability.

Sangiovese red wines produced from organic (ORG) and biodynamic (BDN) vineyards over two consecutive vintages (2011 and 2012) were compared for chem. and sensory parameters to investigate a sustainable approach to grape production The effects of management practice, vintage, and their interaction were investigated. The ORG wines showed higher total acidity and lower volatile acidity and pH. Although trained panelists highlighted some differences in astringency and odor complexity between ORG and BDN wines, consumers had no preference. The concentrations of anthocyanins, phenolic and cinnamic acids, and flavonols, as well as color components, did not differ-contrary to results from the conversion period from ORG to BDN (2009 and 2010) in the same vineyard (Parpinello, Rombola,́ Simoni, & Versari, 2015). Together, these two studies demonstrate that ORG and BDN wine characteristics tend to be similar after the first year of conversion, indicating that the BDN method can produce high-quality Sangiovese wine.

Food Chemistry published new progress about Wine analysis. 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Synthetic Route of 505-10-2.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sagandira, Cloudius R. published the artcileContinuous-Flow Synthesis of (-)-Oseltamivir Phosphate (Tamiflu), SDS of cas: 584-02-1, the main research area is mesylation oseltamivir phosphate Tamiflu synthesis shikimate azide.

Herein the anti-influenza drug (-)-oseltamivir phosphate is prepared in continuous flow from Et shikimate with 54% overall yield over nine steps and total residence time of 3.5 min from the individual steps. Although the procedure involved intermediate isolation, the dangerous azide chem. and intermediates involved were elegantly handled in situ. It is the first continuous-flow process for (-)-oseltamivir phosphate involving azide chem. and (-)-shikimic acid as precursor.

Synlett published new progress about Sulfonylation. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, SDS of cas: 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Price, Paige M. published the artcileClustering of Iron Oxide Nanoparticles with Amphiphilic Invertible Polymer Enhances Uptake and Release of Drugs and MRI Properties, Recommanded Product: n-Octanol, the main research area is iron oxide nanoparticles polymers.

A functionalization of iron oxide nanoparticles (NPs) of different diameters by the amphiphilic invertible polymer, (PEG600-alt-PTHF650)k (PEG and PTHF stand for poly(ethylene glycol) and poly(tetrahydrofuran), resp.), leads to different NP/polymer architectures for dye/drug uptake and release, as is reported here for the first time. It is demonstrated that 18.6 ± 1.4 and 11.9 ± 0.6 nm NPs are individually coated by this polymer, while 5.9 ± 0.6 nm NPs form nanoparticle clusters (NPCs) which could be isolated by either ultracentrifugation or magnetic separation This phenomenon is most likely due to the character of the (PEG600-alt-PTHF650)k macromol. with alternating hydrophilic and hydrophobic fragments and its dimensions sufficient to cause NP clustering. Utilizing Rhodamine B base (RBB) and doxorubicin (DOX), the data on uptake upon mixing and further release via inversion into octanol (mimicking the penetration of the cell biomembrane) are presented. The magnetic NPCs display enhanced uptake and release of both RBB and DOX most likely due to the higher retained polymer amount The NPCs also display exceptional magnetic resonance imaging properties. This and the high uptake/release efficiency of the NPCs combined with easy magnetic separation make them promising for theranostic probes for magnetically targeted drug delivery.

Particle & Particle Systems Characterization published new progress about Nanoparticles. 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

Naeem, Mohammad published the artcileEffective performance of CeO2 based silica for preparation of octanal, Related Products of alcohols-buliding-blocks, the main research area is octanal ceria silica nanoparticle oxidation catalyst property.

Alcs. are naturally occurring substances that are mainly used to prepare aldehydes through oxidation/dehydrogenation processes (such as coupling transfer dehydrogenation reactions), where unsaturated organic compounds are used as an oxidants. In the industrial field, various homogeneous and heterogeneous catalysts are used for the oxidation of alcs. and the formation of aldehydes in a short period of time, greater chem. conversion, high yields and higher selectivity. In this work, silica and ceria nanoparticles have been synthesized by sol-gel and co-precipitation methods, where silica is used as a support material for catalytically active nano-sized ceria. Catalyst calcined at 600°C and characterized by FT-IR, TEM, SEM and XRD was used for liquid-phase oxidation of primary alcs. Maximum percentage conversion with high selectivity of octanol to octanal was obtained at 60°C in 1 h with respect to 0.5 g catalytic dose. In the presence of a heterogeneous catalyst, the percentage conversion and selectivity of octanol to octanal was found to increase over time.

Journal of Porous Materials published new progress about Nanoparticles. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Guancong published the artcileHeterogeneous Solid-State Plasticity of a Multi-Functional Metallo-Supramolecular Shape-Memory Polymer towards Arbitrary Shape Programming, Quality Control of 7575-23-7, the main research area is metallo supramol shape memory polymer; metallo-supramolecular interactions; reprocessing; self-welding; shape programming; shape-memory polymers.

Shape-memory polymers (SMPs) exhibit notable shape-shifting behaviors under environmental stimulations. In a specific shape-memory cycle, the material can be temporarily fixed at diverse geometries while recovering to the same permanent shape driven by the elastic network, which somewhat limits the versatility of SMPs. Via dynamic metallo-supramol. interactions, herein, we report a multi-functional shape-memory polymer with tunable permanent shapes. The network is constructed by the metallic coordination of a four-armed polycaprolactone with a melting temperature of 54°C. Owing to the thermo-induced stress relaxation through the bond exchange, the SMPs can be repeatedly programmed into different geometries in their solid state and show the self-welding feature. Via further welding of films crosslinked by different ions, it will present heterogeneous solid-state plasticity, and a more sophisticated shape can be created after the uniform thermal treatment. With elasticity and plasticity in the same network, the SMPs will display programmable shape-shifting behaviors. Addnl., the used material can be recast into a new film which retains the thermo-induced plasticity. Overall, we establish a novel strategy to manipulate the permanent shapes of SMPs through solid-state plasticity and develop a multi-functional shape-shifting material that has many practical applications.

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

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Duss, Markus published the artcileA new simplified tray efficiency model with improved accuracy for sieve trays, Product Details of C8H18O, the main research area is sieve tray efficiency ammonia styrene acetic acid.

Engineers rarely use modern tray efficiency models due to the high effort required implementing them and due to their lack of accuracy. The more rigorous traditional models require many input parameters; newer mechanistic models increase the complexity even further. In sharp contrast, O’Connell’s empirical but simple correlation is widely applied despite its shortcomings.We will present a simplified model based on the traditional approach that allows a process engineer to estimate the tray efficiency during the hydraulic design phase, when an equilibrium stage simulation is available. Despite the simplifications, the new model achieves improved accuracy at predicting the section efficiencies when compared to both the O’Connell method and to more rigorous (and complicated) modern methods.

Chemical Engineering Research and Design published new progress about Mass transfer. 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

Zsabka, Peter published the artcileSelective extraction of trivalent actinides using CyMe4BTPhen in the ionic liquid Aliquat-336 nitrate, Name: n-Octanol, the main research area is trivalent actinide ionic liquid aliquat336 nitrate phase transfer catalyst.

The extraction of Am(III), Cm(III) and Eu(III) by 2,9-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-1,10-phenanthroline (CyMe4BTPhen) from nitric acid solution was studied using the ionic liquid Aliquat-336 nitrate ([A336][NO3]) as diluent. Results show a high selectivity of the solvent for Am(III) and Cm(III) over Eu(III), but rather slow extraction kinetics. The kinetics of CyMe4BTPhen were largely improved by the addition of 0.005 mol L-1N,N,N’,N’-tetra-n-octyl-diglycolamide (TODGA) as a phase transfer reagent and by the use of 1-octanol as co-diluent. The addition of the phase transfer catalyst and co-diluent did not compromise the selectivity towards the actinide/lanthanide separation and thus this four-component system can be successfully applied to sep. Am(III) and Cm(III) from the lanthanides.

RSC Advances published new progress about Ionic liquids. 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

Chatterjee, Manashi N. published the artcileBeyond Switches: Ratcheting a Particle Energetically Uphill with a Compartmentalized Molecular Machine, Formula: C13H19NO3, the main research area is switch particle energy uphill compartment mol machine.

Here we correlate chem. (covalent), phys. (thermodn.), and statistical (population distribution) descriptions of behavior with the way that two new types of simple mol. machines (the threads of rotaxanes) perform the task of transporting a Brownian substrate (the rotaxane macrocycle) between two distinguishable binding sites. The first machine-substrate ensemble is a [2]rotaxane that operates through a mechanism that intrinsically causes it to change the average position of the macrocycle irreversibly. This contrasts with the behavior of classic stimuli-responsive mol. shuttles that act as reversible mol. switches. The second system is a compartmentalized mol. machine that is able to pump its substrate energetically uphill using the energy provided by a photon by means of an olefin photoisomerization. Resetting this compartmentalized mol. machine does not undo the work it has carried out or the task performed, a significant difference to a simple mol. switch and a characteristic we recognize as “”ratcheting”” (see Scheme 8). The ratcheting mechanism allows the [2]rotaxane to carry out the transport function envisaged for the historical thought-machines, Smoluchowski’s Trapdoor and Maxwell’s Pressure Demon, albeit via an unrelated mechanism and using an input of energy. We define and exemplify the terms “”ratcheting”” and “”escapement”” in mech. terms for the mol. level and outline the fundamental phenomenol. differences that exist between what constitutes a two-state Brownian switch, a two-state Brownian memory or “”flip-flop””, and a (two-stroke) Brownian motor. We also suggest that considering the relationship between the parts of a mol. machine and a substrate in terms of “”statistical balance”” and “”linkage”” could be useful in the design of more complex systems and in helping to understand the role of individual amino acids and peptide fragments during the directional transport of substrates by biol. pumps and motors.

Journal of the American Chemical Society published new progress about Hydrogen bond. 87905-98-4 belongs to class alcohols-buliding-blocks, name is Benzyl (5-hydroxypentyl)carbamate, and the molecular formula is C13H19NO3, Formula: C13H19NO3.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhang, Huan published the artcileExperimental investigation of heat and mass transfer in a LiBr-H2O solution falling film absorber on horizontal tubes: Comprehensive effects of tube types and surfactants, Recommanded Product: n-Octanol, the main research area is surfactant lithium bromide water solution falling film absorber tube.

This paper studied the effects of various surface geometries and surfactants on the LiBr-H2O solution falling film absorption, and the heat and mass transfer during the absorption process. Three different tubes (plain tube, floral tube and floral finned tube) were tested for the LiBr-H2O solution with two different surfactants (2-Ethyl-1-hexanol and 1-Octanol). The results indicate that the heat and mass transfer coefficients of each tube gradually decrease with solution falling down the tube bundle. It is also showed that the effect of surfactant on heat and mass transfer is obviously greater than that of tube surface geometry. Furthermore, with 2-Ethyl-1-hexanol as the surfactant, the heat and mass transfer can be improved by 400% and 350%, resp. The results of comparative study show that the heat and mass transfer performance of floral tubes with 2-Ethyl-1-hexanol is more stable and reliable than others.

Applied Thermal Engineering published new progress about Heat transfer. 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