Tag: M.W:100-200

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 79-50-5, Name is 3-Hydroxy-4,4-dimethyldihydrofuran-2(3H)-one, molecular formula is C6H10O3. In an article, author is Kuehne, Friederike,once mentioned of 79-50-5, SDS of cas: 79-50-5.

Characterisation of Elastomers as Food Contact Materials-Part 1: Quantification of Extractable Compounds, Swelling of Elastomers in Food Simulants and Release of Elements

Elastomers are not a uniform class of materials but comprise a broad spectrum of chemically different polymers. Sealing gaskets, gloves, teats, conveyor belts and tubing are examples of elastomers being used as food contact materials (FCMs). Ten elastomer samples were evaluated with respect to the content of extractable compounds, migration of substances into ethanolic food simulants, swelling in food simulants and release of elements in different food simulants. The number of extractable substances <1000 Da was determined by comprehensive two-dimensional gas chromatography coupled with flame ionisation detection (GC x GC-FID) analysis of tetrahydrofuran (THF) extracts. The number of signals ranged from 61 (a thermoplastic elastomer (TPE)) to 690 (a natural rubber/styrene-butadiene-rubber blend (NR/SBR)). As for risk assessment, the decisive factor is which substances reach the food. The extent of substances that migrate into ethanolic food simulants was investigated. Elastomer FCMs can be the source of food contamination with heavy metals. Notably, contamination with lead was detected in some samples investigated in this study. It was shown that food simulants harbour the potential to morphologically alter or even disintegrate elastomeric materials. The results presented here highlight the importance to carefully choose the elastomer type for the intended use as FCMs as not every application may prove safe for consumers. Interested yet? Keep reading other articles of 79-50-5, you can contact me at any time and look forward to more communication. SDS of cas: 79-50-5.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 706-14-9, Name is gamma-Decanolactone, molecular formula is C10H18O2. In an article, author is Liu, Xinyao,once mentioned of 706-14-9, Name: gamma-Decanolactone.

Dual Physically Cross-Linked Hydrogels Incorporating Hydrophobic Interactions with Promising Repairability and Ultrahigh Elongation

Novel dual physically cross-linked (DPC) hydrogels with great tensile strength, ultrahigh elongation, and promising repairability are designed by introducing cellulose nanocrystal (CNC) or hydrophobized CNC (CNC-C8) into polymers physically cross-linked by hydrophobic forces. C18 alkyl chain is grafted to N-[3-(dimethylamino)propyl]methacrylamide (DMAPMA) for hydrophobic monomer (DMAPMA-C18), and C8 to CNC surface for hydrophobic CNC (CNC-C8). CNC-C8 (or CNC) DPC hydrogels are synthesized, with monomers N,N-dimethylacrylamide (DMAc) and DMAPMA-C18 polymerized to form the first network physically cross-linked by hydrophobic interactions, on which the secondary cross-linking points are formed by hydrophobic interactions between CNC-C8 and DMAPMA-C18, electrostatic interactions between CNC-C8 (or CNC) and DMAPMA, as well as hydrogen bonding between CNC-C8 (or CNC) and DMAc. Compared with optimum CNC DPC hydrogels of the highest tensile strength (238 +/- 8 kPa), the optimum CNC-C8 DPC hydrogel with 0.0675 w/v% DMAPMA-C18 and 0.4 w/v% CNC-C8 possesses stronger tensile strength of 331 +/- 32 kPa and excellent elongation of 4268% +/- 1446% as well, demonstrating the enhanced mechanical property of the hydrogel by introduced hydrophobic interactions. In addition, such DPC hydrogel can be facilely repaired with tetrahydrofuran (THF) on the cut surfaces while retaining good tensile stress and elongation behaviors.

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Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Related Products of 706-14-9, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C¨CH bond functionalisation has revolutionised modern synthetic chemistry. 706-14-9, Name is gamma-Decanolactone, SMILES is O=C1OC(CCCCCC)CC1, belongs to tetrahydrofurans compound. In a article, author is Date, Nandan S., introduce new discover of the category.

One Pot Hydrogenation of Furfural to 2-Methyl Tetrahydrofuran over Supported Mono- and Bi-metallic Catalysts

2-Methyltetrahydrofuran is a valuable commercial product that can be obtained by direct hydrogenation of furfural. In the present study, among several carbon supported bimetallic Ir-Ni catalysts with different loadings screened, 4% Ir-4% Ni/C catalyst showed excellent activity in terms of direct conversion (99%) to 2-MeTHF with a maximum selectivity of similar to 74% at 220 degrees C and 750 psig, suppressing the formation of side chain as well as ring opening products. The catalytic activity was found to be mainly affected by catalyst preparation methods, metal loadings, surface composition, temperature, pressure and catalyst loading. HR-TEM and STEM revealed well dispersed Ir-Ni NPs having the particle sizes in the range of 2 to 5 nm. Different phases of Ir i. e. Ir degrees and IrO(2)as well as oxygen vacancies were found to be responsible for hydrogenation of furfural to 2-methyl furan while, Ni degrees and NiO were responsible for further hydrogenation to 2-MeTHF. The synergic effect between Ir and Ni was established through XPS, H-2-TPR analysis. With the help of some control experiments, the plausible reaction pathway was also proposed. The catalyst prepared by co-impregnation method found more effective than prepared by sequential addition method. At lower Ni loadings of 1% and 2%, low temperature of 160 degrees C as well as at low H(2)pressure of 250 psig, mixture of furfuryl alcohol and 2-methyl furan were formed selectively. Catalyst could be successfully reused up to 3 times without leaching of metals.

Related Products of 706-14-9, The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 706-14-9 is helpful to your research.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Application of 108-30-5, Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. 108-30-5, Name is Dihydrofuran-2,5-dione, SMILES is O=C(CC1)OC1=O, belongs to tetrahydrofurans compound. In a article, author is Yaragani, Muralikrishna, introduce new discover of the category.

Design and synthesis of novel tetrahydrofuran cyclic urea derivatives as androgen receptor antagonists

In order to improve the antiproliferative activity of androgen receptor (AR) antagonists, which used clinically for the treatment of prostate cancer that is a major cause of male death in worldwide, we report the design and synthesis of a series of tetrahydrofuran cyclic urea-based non-steroidal small molecule AR antagonists and exhibit potent AR antagonistic activity. These molecules with higher stereochemical aspects have been achieved by changing the hydantoin analogue antiandrogens to 4-(2-oxohexahydro-1H-furo[3,4-d] imidazol-1-yl)-2-(trifluoromethyl)benzonitrile analogues. Here, the thio-hydantoin pharmacophore of the recently reported antagonists is replaced by tetrahydrofuran cyclic urea. The antiproliferative properties of these molecules have been evaluated against androgen-dependent (LNCaP) cell line. Among the reported molecules, 4-(2-oxohexahydro-1H-furo[3,4-d]imidazol-1-yl)-2-(trifluoromethyl)benzonitrile (AR04) showed significantly improved in vitro activity, IC50= 3.926 mu M. Molecular structure-activity relationship studies confirm that the oxetane analogueAR04is distinct from other synthesized AR antagonists. These results have suggested thatAR04exhibiting their potential as a lead compound for the alternative treatment of prostate cancer.

Application of 108-30-5, Consequently, the presence of a catalyst will permit a system to reach equilibrium more quickly, but it has no effect on the position of the equilibrium as reflected in the value of its equilibrium constant.I hope my blog about 108-30-5 is helpful to your research.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Chemistry, like all the natural sciences, begins with the direct observation of nature¡ª in this case, of matter.104-61-0, Name is 5-Pentyldihydrofuran-2(3H)-one, SMILES is O=C1OC(CCCCC)CC1, belongs to tetrahydrofurans compound. In a document, author is Romanenko, G. V., introduce the new discover, Safety of 5-Pentyldihydrofuran-2(3H)-one.

STRUCTURE OF A Pd-ORGANIC PARAMAGNETIC

By the interaction of 2-bromo-4,4,5,5-tetramethyl-2-imidazoline-3-oxide-1-oxyl (NN-Br) with tetrakis(triphenylphosphine)palladium(0) a new paramagnetic palladium-organic compound [Pd(NN)(PPh3)(2)Br] is synthesized. The crystal structure of its tetrahydrofuran solvate is determined by X-ray diffraction. The obtained data allow us to expect that the effective Pd-C bond eclipsing by phenyl rings deactivates the compound in a cross-coupling reaction with aryl halides and provides its high kinetic stability under normal conditions. Magnetochemical studies show the presence of weak antiferromagnetic exchange interactions between spins of paramagnetic [Pd(NN)(PPh3)(2)Br].

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 104-61-0 is helpful to your research. Safety of 5-Pentyldihydrofuran-2(3H)-one.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 104-61-0, Name is 5-Pentyldihydrofuran-2(3H)-one, molecular formula is C9H16O2, belongs to tetrahydrofurans compound. In a document, author is Benassi, Enrico, introduce the new discover, Name: 5-Pentyldihydrofuran-2(3H)-one.

Determination of the molecular size from measurements of vapour pressure of binary liquid mixtures. Theory, experiments and quantum chemical calculations

In the present work we focus on some fundamental organic solvents. The total and partial vapour pressure of 30 binary systems made of hexane, cyclohexane, and benzene with 10 organic molecules, namely chloroform (Chl), chlorobenzene (Cl-Ben), tetrahydrofuran (THF), dichloromethane (DCM), acetone (Ac), ethanol (Et0H), N, N-dimethylformamide own, methanol (MeOH), acetonitrile (MeCN) and dimethylsulphoxide (DMSO), were measured using the method developed by Sameshima. A simple electrostatic model was derived to express the change of the Helmholtz free energy as a function of dielectric properties of the binary mixtures, as well as the dielectric constant, dipole moment, dipole polarizability, and radius of a spherical cavity hosting the aforementioned 10 organic molecules. Through measurements of the partial vapour pressure of these 10 organic liquids, the size of the cavity was extracted, which approximates their molecular size. The molecular size obtained from the experiments exhibits a good agreement with the results as obtained from the cavity size calculated using the Polarizable Continuum Model (PCM). The partial vapour pressure of some compounds such as Ac, DMF, DMSO, and MeCN presented severe deviation from the Raoult law. The intermolecular interaction among the molecules of each compound was believed to take responsibility for their exceptional behaviours in vapour pressure. (C) 2020 Elsevier B.V. All rights reserved.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law. In my other articles, you can also check out more blogs about 104-61-0. Name: 5-Pentyldihydrofuran-2(3H)-one.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Synthetic Route of 3188-00-9, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 3188-00-9, Name is 2-Methyltetrahydrofuran-3-one, SMILES is CC1C(CCO1)=O, belongs to tetrahydrofurans compound. In a article, author is Wang, Jing, introduce new discover of the category.

Highly sensitive pyrene-dansyl conjugate-based fluorescent sensor for discriminative detection of water in organic solvents

In this work, we designed a dual-fluorophore-based water sensor 5-(dimethylamino)- N’-(pyren-1-ylmethylene)naphthalene-1-sulfonohydrazide (PDH) by combining pyrene, which exhibits monomer/excimer switching emission, and dansyl, which shows typical intramolecular charge transfer (ICT) activity. The effects of solvents on PDH and two control compounds were studied. Results showed that PDH exhibited tunable fluorescence properties, and the two fluorescent units of PDH could behave independently and synergistically. Generally, the fluorescent emission of PDH displayed two distinct modes in various solvents. On the one hand, only pyrene emission was observed in N, N-dimethylformamide (DMF), acetonitrile (AN), ethanol (EtOH), dimethyl sulfoxide (DMSO), methanol (MeOH), acetone, and tetrahydrofuran (THF) because these solvents affected the push-pull interactions between dimethyamino moiety and naphthalenesulfonyl and the aggregation behavior. On the other hand, efficient Forster resonance energy transfer (FRET) from the pyrene unit to the dansyl moiety was observed in dichloromethane (CH2Cl2), chloroform (CHCl3), ethyl acetate (EA), toluene, and water (H2O). The fluorescence spectra displayed strong dansyl emission and weak pyrene monomer emission due to the synergy of ICT and FRET. By taking advantage of the monomer/excimer switching, ICT, and FRET activities, the fluorescence tunability of PDH was applied for the differentiation of solvents and discriminative detection of H2O content in three organic solvents, including acetone, DMF, and DMSO.

Synthetic Route of 3188-00-9, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 3188-00-9.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Reference of 7331-52-4, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 7331-52-4, Name is (S)-4-Hydroxydihydrofuran-2(3H)-one, SMILES is O=C1OC[C@@H](O)C1, belongs to Tetrahydrofurans compound. In a article, author is Swar, Sumita, introduce new discover of the category.

The Covalent Tethering of Poly(ethylene glycol) to Nylon 6 Surface via N,N ‘-Disuccinimidyl Carbonate Conjugation: A New Approach in the Fight against Pathogenic Bacteria

Different forms of unmodified and modified Poly(ethylene glycols) (PEGs) are widely used as antifouling and antibacterial agents for biomedical industries and Nylon 6 is one of the polymers used for biomedical textiles. Our recent study focused on an efficient approach to PEG immobilization on a reduced Nylon 6 surface via N,N ‘-disuccinimidyl carbonate (DSC) conjugation. The conversion of amide functional groups to secondary amines on the Nylon 6 polymer surface was achieved by the reducing agent borane-tetrahydrofuran (BH3-THF) complex, before binding the PEG. Various techniques, including water contact angle and free surface energy measurements, atomic force microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy, were used to confirm the desired surface immobilization. Our findings indicated that PEG may be efficiently tethered to the Nylon 6 surface via DSC, having an enormous future potential for antifouling biomedical materials. The bacterial adhesion performances against S. aureus and P. aeruginosa were examined. In vitro cytocompatibility was successfully tested on pure, reduced, and PEG immobilized samples.

Reference of 7331-52-4, The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 7331-52-4 is helpful to your research.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

5061-21-2, Name is 2-Bromo-4-butanolide, molecular formula is C4H5BrO2, belongs to Tetrahydrofurans compound, is a common compound. In a patnet, author is Althikrallah, Hanan, once mentioned the new application about 5061-21-2, Category: Tetrahydrofurans.

Turnover Rate of Metal-Catalyzed Hydroconversion of 2,5-Dimethylfuran: Gas-Phase Versus Liquid-Phase

Hydroconversion (hydrogenation and hydrogenolysis) of biomass-derived furanic compounds giving furan ring-hydrogenation and ring-cleavage products attracts interest for sustainable production of chemicals and fuels. Here, the hydroconversion of 2,5-dimethylfuran (DMF), chosen as a model furanic compound, was investigated at a gas-solid interface over carbon-supported Pt, Pd, Rh and Ru metal catalysts in a fixed-bed reactor at 70-90 degrees C and ambient pressure. Pt/C was mainly active in ring cleavage of DMF to produce 2-hexanone as the primary product, followed by its hydrogenation to 2-hexanol and hexane. In contrast, Pd/C, Rh/C and Ru/C selectively hydrogenated the furan ring to 2,5-dimethyltetrahydrofuran (DMTHF). The turnover frequency (TOF) of metal sites in the gas-phase DMF hydroconversion was determined from zero-order kinetics in the absence of diffusion limitations. The TOF values decreased in the sequence Pt > Rh > Pd >> Ru, similar to the liquid-phase reaction. The TOF values for the gas-phase reaction were found to be one order of magnitude greater than those for the liquid-phase reaction. This indicates that the gas-phase process is potentially more efficient than the liquid-phase process. TOF values for hydroconversion of ring-saturated furan derivatives, tetrahydrofuran and DMTHF, on Pt/C, were much lower than those for DMF.

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Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 79-50-5, Name is 3-Hydroxy-4,4-dimethyldihydrofuran-2(3H)-one, molecular formula is C6H10O3. In an article, author is Mangili, Patrick Vaz,once mentioned of 79-50-5, Computed Properties of C6H10O3.

Exergoenvironmental Analysis of Tetrahydrofuran/Ethanol Separation through Extractive and Pressure-Swing Distillation

Extractive distillation uses a high-boiling point solvent for changing the relative volatility of the azeotropic mixture, whereas pressure-swing distillation is based on the difference of operating pressures for such a purpose. In this paper, said separation technologies were applied to a tetrahydrofuran/ethanol mixture and compared with regard to their thermodynamic and environmental performances. The former was assessed by determining the total exergy destruction rate and rational efficiency of each configuration, while the latter was evaluated by estimating their respective indirect carbon emissions. The results showed that the pressure-swing process has not only the lowest exergy destruction rate (383.1 kW) but also the lowest CO2 emission rate (678.7 kg/h), which is mainly due to its lower thermal energy requirements. A sensitivity analysis was then carried out in order to determine how the carbon emissions respond to both the efficiency and the fuel type of the utility boiler.

Interested yet? Keep reading other articles of 79-50-5, you can contact me at any time and look forward to more communication. Computed Properties of C6H10O3.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem