Tag: M.W=100-200

Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , SDS of cas: 870-72-4, 870-72-4, Name is Hydroxymethanesulfonic Acid Sodium Salt, molecular formula is CH3NaO4S, belongs to alcohols-buliding-blocks compound. In a document, author is Xu, Lin, introduce the new discover.

Kinetic study of carbonylation of ethanol to propionic acid using homogeneous rhodium complex catalyst in the presence of diphosphine ligand

Carbonylation of ethanol is a potentially attractive route for propionic acid production, while its industrial practice is greatly hampered by the low space-time yield. To improve the reaction rate of ethanol carbonylation, a series of diphosphine ligands were investigated in the homogeneous rhodium complex catalyst system. The catalyst activity and stability were enhanced by using bis(diphenylphosphino)methane monosulfide (dppmS) as hemilabile diphosphine ligand and the space-time yield of propionic acid was increased significantly. In the presence of dppmS, not only the effect of ligand addition, the content of ethyl iodide, lithium iodide, and rhodium catalyst on catalytic performance were carried out, but also the reaction conditions were systematically investigated in a titanium alloy autoclave reactor. Consequently, the carbonyl space-time yield reached 6.21 mol.L-1.h(-1) under the optimal reaction conditions. Additionally, the corresponding mechanism of ethanol carbonylation with addition of dppmS was proposed. A kinetic model of the reaction was established in the temperature range of 433-473 K. The reaction orders of catalyst, ethyl iodide, and iodide ion concentrations were determined to be 0.86, 0.36, and 0.20, respectively. The activation energy was found to be 25.23 kJ.mol(-1). Residual error distribution n and a statistical test showed that the kinetic model is reasonable and acceptable.

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 870-72-4. SDS of cas: 870-72-4.

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Chemistry is traditionally divided into organic and inorganic chemistry. The former is the study of compounds containing at least one carbon-hydrogen bonds. 770-71-8, Name is Adamantan-1-ylmethanol, molecular formula is C11H18O, belongs to alcohols-buliding-blocks compound, is a common compound. In a patnet, author is Wang, Jie, once mentioned the new application about 770-71-8, Product Details of 770-71-8.

Strong metal-support interaction induced O-2 activation over Au/MNb2O6 (M= Zn2+, Ni2+ and Co2+) for efficient photocatalytic benzyl alcohol oxidative esterification

A series of metal niobates (MNb2O6, M = Zn2+, Ni2+ and Co2+) were prepared from H-niobate precursor under hydrothermal conditions, in which amino groups of L-lysine play an important role. Au nanoparticles were then supported on these niobates by NaBH4 reduction method. More importantly, the strong interaction between Au nanoparticles and ZnNb2O6 generates negatively charged Au which can activate molecular oxygen to form the exclusive high-active peroxide (NbOOAu) species on Au/ZnNb2O6 surface under visible light irradiation, observed in situ by diffuse reflectance infrared Fourier transform spectra (DRIFTS). The optimal NbOOAu species produced on the surface of Au/ZnNb2O6 can remove the H atom of the methylene group (-CH2-) of benzyl alcohol, leading to high photocatalytic activity of Au/ZnNb2O6 compared with Au/NiNb2O6 and Au/CoNb2O6. This modulation of interaction of Au and niobates for the activation of molecular oxygen provides a new prospect for highly selective photocatalytic oxidation reactions.

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Reactions catalyzed within inorganic and organic materials and at electrochemical interfaces commonly occur at high coverage and in condensed media, causing turnover rates to depend strongly on interfacial structure and composition, 115-70-8, Name is 2-Amino-2-ethylpropane-1,3-diol, SMILES is OCC(CC)(N)CO, in an article , author is Noel, Xavier, once mentioned of 115-70-8, Product Details of 115-70-8.

Distinct Whole-Body Movements in Response to Alcohol and Sexual Content in Alcohol Use Disorder

Background Spontaneous motor responses of approach and avoidance toward stimuli are important in characterizing psychopathological conditions, including alcohol use disorder (AUD). However, divergent results have been reported, possibly due to confounded parameters (e.g., using a symbolic vs. a sensorimotor task, implementation of approach-avoidance as a measure vs. a manipulation). Methods We studied whole-body/posturometric changes by using a sensorimotor measure relying on embodied cognition principles to assess forward (approach) and backward (avoidance) spontaneous leaning movements. Over a 12-second period, 51 male patients with AUD and 29 male control participants were instructed to stand still in response to both alcohol and sexual visual content. Patients with AUD were then divided into abstainers and relapsers, depending on their continuous abstinence at 2 weeks postdischarge (obtained via a telephone follow-up interview). The effects of the group, the stimulus type, the experimental period, and their interactions on the posturometric changes were tested using mixed Analyses of variance (ANOVAs), with a significance threshold set at 0.05. Results Contrary to our expectations, patients and controls did not show significant difference in their forward/backward micromovements while passively viewing alcohol or sexual content (p > 0.1). However, in line with our hypothesis, patients who relapsed several weeks following discharge from the rehabilitation program were significantly more reactive and more likely to lean back during the first seconds of viewing alcohol cues (p = 0.002). Further, relapsers were more likely to lean forward during exposure to sexual content than participants who remained abstinent (p < 0.001). Conclusions Among individuals with AUD, there are distinct pattern of spontaneous movements that differentiate abstainers and relapsers, findings that can be understood in light of existing data and theories on action tendencies. Interested yet? Read on for other articles about 115-70-8, you can contact me at any time and look forward to more communication. Product Details of 115-70-8.

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In an article, author is Capaz, Rafael S., once mentioned the application of 623-50-7, Name is Ethyl 2-hydroxyacetate, molecular formula is C4H8O3, molecular weight is 104.1045, MDL number is MFCD00021970, category is alcohols-buliding-blocks. Now introduce a scientific discovery about this category, Quality Control of Ethyl 2-hydroxyacetate.

The carbon footprint of alternative jet fuels produced in Brazil: exploring different approaches

Although the potential of Alternative Jet Fuels (AJF) to reduce greenhouse gases (GHG) emissions has been widely reported upon in the literature, there are still discrepancies among the results. These may be due to the different GHG accounting methods, including those used by different Low-Carbon Policies (LCPs). To have a clearer understanding of the life cycle performance of AJF, the carbon footprint of ten pathways was estimated, comprising promising feedstocks – such as soybean, palm, sugarcane, sugarcane residues, forestry residues, used cooking oil, beef tallow, and steel off-gases – and ASTM-approved technologies: Hydroprocessed Fatty Acids, Alcohol-to-Jet, and Fischer-Tropsch. Six methodological approaches were used: the attributional and the consequential life cycle assessment, as well as guidelines for the four LCPs: Renovabio (Brazil), CORSIA (aviation sector), RFS (United States), and RED II (Europe). Soybean-based pathway (24 to 98.7 gCO(2e)/MJ) had the low to no potential for reducing GHG when compared to their fossil counterparts, mainly due to land use change. Of all food-based pathways, AJF produced from sugarcane performed the best (-10.4 to 43.7 gCO(2e)/MJ), especially when power surplus was credited. AJF from palm oil could present significant GHG reduction for palm expansion in degraded pasturelands. By contrast, Fischer-Tropsch of lignocellulosic residues showed the highest potential for reducing GHG (-95% to -130%). Different from food-based pathways, the potential GHG reduction of residues-based pathways converged within a narrower range (-130% to -50%), except when residual feedstocks have to be redirected from their current economic use. It could lead to GHG emissions higher than fossil fuel.

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Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 2009-83-8, Name is 6-Chlorohexan-1-ol, molecular formula is C6H13ClO. In an article, author is Bitire, Sarah Oluwabunmi,once mentioned of 2009-83-8, HPLC of Formula: C6H13ClO.

Transesterification of parsley seed oil using a green catalyst: considering the optimization process and modeling

Y The production of bio-based diesel by using calcium oxide catalyst derived from waste material was investigated in this work as well as the influence of varying the process variables on the biodiesel yield. The optimisation of the process variables (ratio of alcohol-to-oil, temperature, and the amount of catalyst) for parsley biodiesel was achieved using RSM. The biodiesel yield of 92.19% was predicted from the data analysis as the optimum yield at optimum reaction conditions of 9.4:1, 59.31 degrees C, and 2.7 wt% for the molar ratio of alcohol: oil, temperature and catalyst amount respectively. The characterisation of the biodiesel was achieved with FTIR and GC-MS. Also, the fuel characteristics of biodiesel were within the specifications of the ASTM D6751.

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Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 873-76-7, Name is (4-Chlorophenyl)methanol, molecular formula is C7H7ClO. In an article, author is Lee, Chia-Kuei,once mentioned of 873-76-7, Formula: C7H7ClO.

Impacts of childhood adversity forms and drinker self-schema on undergraduate drinking behaviors and depression

Purpose: Drinking behaviors and depression are common and highly correlated behaviors in undergraduates. Child adversity and drinker self-schemas have been recognized as significant risk factors of drinking behaviors and depression. However, how the various child adversity forms differentially influence the formation of drinker self-schema and behaviors is underexplored. We aimed to determine whether drinker self-schema serves as a mechanism underlying the influence of child adversity forms on drinking frequency, drinking problems, and depressive symptoms. Methods: A cross-sectional, correlational study design with an anonymous, internet-based survey was conducted. Participants were 330 first- and second-year undergraduates enrolled in a four-year college/university as full–time students in Taiwan. Path analysis was performed to examine the direct and indirect effects (through drinker self-schema) of child adversity forms on drinking frequency, drinking problems, and depressive symptoms. Gender and friend’s alcohol use were the covariates. Results: Psychological abuse, psychological neglect, physical neglect, and household substance use were associated with drinker self-schema, which was associated with drinking frequency, drinking problems, and depressive symptoms. Physical abuse was associated with drinking frequency. Household substance use and parent(s) treated violently were associated with drinking problems. Psychological neglect and household mental illness were associated with depressive symptoms. Moreover, psychological abuse and psychological neglect had indirect effects on drinking frequency and drinking problems through drinker self-schema. Conclusions: Different forms of childhood adversity are differently associated with drinker self-schema, drinking behaviors, and depression. Drinker self-schema serves as an underlying mechanism linking psychological mal-treatments to drinking behaviors.

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Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology. 623-50-7, Name is Ethyl 2-hydroxyacetate, molecular formula is , belongs to alcohols-buliding-blocks compound. In a document, author is Schmermund, Luca, Safety of Ethyl 2-hydroxyacetate.

Chromoselective Photocatalysis Enables Stereocomplementary Biocatalytic Pathways**

Controlling the selectivity of a chemical reaction with external stimuli is common in thermal processes, but rare in visible-light photocatalysis. Here we show that the redox potential of a carbon nitride photocatalyst (CN-OA-m) can be tuned by changing the irradiation wavelength to generate electron holes with different oxidation potentials. This tuning was the key to realizing photo-chemo-enzymatic cascades that give either the (S)- or the (R)-enantiomer of phenylethanol. In combination with an unspecific peroxygenase from Agrocybe aegerita, green light irradiation of CN-OA-m led to the enantioselective hydroxylation of ethylbenzene to (R)-1-phenylethanol (99 % ee). In contrast, blue light irradiation triggered the photocatalytic oxidation of ethylbenzene to acetophenone, which in turn was enantioselectively reduced with an alcohol dehydrogenase from Rhodococcus ruber to form (S)-1-phenylethanol (93 % ee).

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2807-30-9, Name is 2-Propoxyethanol, molecular formula is C5H12O2, belongs to alcohols-buliding-blocks compound, is a common compound. In a patnet, author is Capriolo, G., once mentioned the new application about 2807-30-9, SDS of cas: 2807-30-9.

High-temperature oxidation of propanol isomers in the mixtures with N2O at high Ar dilution conditions

This work provides, for the first time, new information regarding the kinetics interaction between N2O and propyl alcohol isomers. To this end, the formation and consumption of atomic oxygen were measured behind the reflected shock waves using Atomic Resonance Absorption Spectroscopy (ARAS) technique for 1-10 ppm n- i- propanol + 10 ppm N2O + Ar mixtures, at 2-3 bar and over a wide temperature range of 1700-3200 K. The Konnov and POLIMI detailed combustion mechanisms were assessed against experimental data and also employed to study the main reactions influencing the oxidation dynamics of fuel mixtures under the investigated conditions. The study highlighted a certain difficulty by the models tested in predicting the formation of atomic oxygen at T < 2000 K. The rate of production and the sensitivity analysis was performed with the attempt to identify the most important reactions involved in the process oxidation for future kinetic model refinements. If you¡¯re interested in learning more about 2807-30-9. The above is the message from the blog manager. SDS of cas: 2807-30-9.

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42142-52-9, Name is 3-(Methylamino)-1-phenylpropan-1-ol, molecular formula is C10H15NO, belongs to alcohols-buliding-blocks compound, is a common compound. In a patnet, author is Xia, Chenlan, once mentioned the new application about 42142-52-9, Application In Synthesis of 3-(Methylamino)-1-phenylpropan-1-ol.

Free fatty acids responsible for characteristic aroma in various sauced-ducks

To investigate the effects of various duck sources on the lipid oxidation and aroma flavor of sauced-ducks, Mallard (ML), Sheldrake (SD), Muscovy (MC), and Cherry-Valley (CV) ducks were used in sauced-duck processing. The results showed significantly different thiobarbituric acid reactive substances (TBARS) values of the four samples (SD 0.05), while the contents of unsaturated fatty acids (UFAs) were ML SD/CV > MC (p < 0.05). Altogether, 105 volatile flavor compounds were detected in sauced-ducks, including acids, alcohols, aldehydes, ketones, esters, hydrocarbons, furans, nitrogen compounds, and others. The volatile compounds were observed differentially composed in the four products, and nineteen potential characteristic biomarkers were explored. The correlation analysis indicated that the characteristic aroma flavor of sauced ducks were significantly associated with specific free fatty acids. These information are useful for learning aroma formation and meat selection and identification in duck products. If you¡¯re interested in learning more about 42142-52-9. The above is the message from the blog manager. Application In Synthesis of 3-(Methylamino)-1-phenylpropan-1-ol.

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Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, Product Details of 115-70-8115-70-8, Name is 2-Amino-2-ethylpropane-1,3-diol, SMILES is OCC(CC)(N)CO, belongs to alcohols-buliding-blocks compound. In a article, author is Li, Yixuan, introduce new discover of the category.

Degradable Poly(vinyl alcohol)-Based Supramolecular Plastics with High Mechanical Strength in a Watery Environment

It is challenging to fabricate degradable poly(vinyl alcohol) (PVA)-based plastics that can be used in watery environments because PVA is soluble in water. In this study, PVA-based supramolecular plastics with excellent degradability in soil and high mechanical strength in watery environments are fabricated by the complexation of vanillin-grafted PVA (VPVA), hydrophobic humic acid (HA), and Fe3+ ions (hereafter denoted as VPVA-HA-Fe complexes). Large-area PVA-based plastics can be easily prepared from a solution of VPVA-HA-Fe complexes using a blade-coating method. The high-density of hydrogen bonds and coordination interactions, as well as the reinforcement of self-assembled Fe3+-chelated HA nanoparticles, facilitate the fabrication of PVA-based plastics with a breaking strength of approximate to 85.0 MPa. After immersion in water at room temperature for 7 d, the PVA-based plastics exhibit a breaking strength of approximate to 26.2 MPa, which is similar to that of polyethylene in its dry state. Furthermore, owing to the reversibility of the hydrogen bonds and coordination interactions, the VPVA-HA-Fe plastics are recyclable and can be conveniently processed into plastic products with desired shapes. After being placed under soil for approximate to 108 d, the PVA-based plastics are completely degraded into nontoxic species without requiring manual interference.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions. you can also check out more blogs about 115-70-8. Product Details of 115-70-8.

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