Tag: M.W=0-100

Related Products of 2854-16-2, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 2854-16-2, Name is 1-Amino-2-methylpropan-2-ol, SMILES is CC(O)(C)CN, belongs to alcohols-buliding-blocks compound. In a article, author is Akbari, Mehdi, introduce new discover of the category.

Psychometric properties of the Metacognitions about Smartphone Use Questionnaire (MSUQ) in a sample of iranians

Research has shown that metacognitions are associated with addictive behaviors. This study aimed to evaluate the psychometric properties (i.e., factor structure, reliability, and predictive validity) of the Persian Meta-cognitions about Smartphone Use Questionnaire (Persian MSUQ). A community sample of 618 participants (63.6% female, mean age = 27.31 +/- 8.95 years; age range: 15-67 years) was recruited in Iran. The results of exploratory factor analysis revealed that the Persian MSUQ had a three-factor structure, similar to the parent version, named positive metacognitions about emotional and cognitive regulation, negative metacognitions about uncontrollability and cognitive harm, and positive metacognitions about social advantages. The confirmatory factor analysis indicated that the three-factor structure of the Persian MSUQ had appropriate fit. Cron-bach’ s alphas for the three factors were 0.89, 0.88, and 0.70, respectively. Test-retest coefficients over a 6-week interval showed good reliability for the Persian MSUQ total score (ICC = 0.81; 95% CI: 0.72-0.87). Regression analyses showed that metacognitions about smartphone use predicted problematic smartphone use independently of anxiety and depression. The findings suggest that the Persian MSUQ has appropriate psychometric properties in the Iranian context.

Related Products of 2854-16-2, 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 2854-16-2.

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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. 2516-33-8, Name is Cyclopropylmethanol, molecular formula is C4H8O, belongs to alcohols-buliding-blocks compound, is a common compound. In a patnet, author is Wang, Jianchun, once mentioned the new application about 2516-33-8, Recommanded Product: Cyclopropylmethanol.

Selective CO2 Electrochemical Reduction Enabled by a Tricomponent Copolymer Modifier on a Copper Surface

Electrochemical CO2 reduction over Cu could provide value-added multicarbon hydrocarbons and alcohols. Despite recent breakthroughs, it remains a significant challenge to design a catalytic system with high product selectivity. Here we demonstrate that a high selectivity of ethylene (55%) and C2+ products (77%) could be achieved by a highly modular tricomponent copolymer modified Cu electrode, rivaling the best performance using other modified polycrystalline Cu foil catalysts. Such a copolymer can be conveniently prepared by a ring-opening metathesis polymerization, thereby offering a new degree of freedom for tuning the selectivity. Control experiments indicate all three components are essential for the selectivity enhancement. A surface characterization showed that the incorporation of a phenylpyridinium component increased the film robustness against delamination. It was also shown that its superior performance is not due to a morphology change of the Cu underneath. Molecular dynamics (MD) simulations indicate that a combination of increased local CO2 concentration, increased porosity for gas diffusion, and the local electric field effect together contribute to the increased ethylene and C2+ product selectivity.

We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, 2516-33-8. The above is the message from the blog manager. Recommanded Product: Cyclopropylmethanol.

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The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. Computed Properties of C4H6O, 927-74-2, Name is 3-Butyn-1-ol, SMILES is C#CCCO, in an article , author is Yu, Meimei, once mentioned of 927-74-2.

Chemically building interpenetrating polymeric networks of Bi-crosslinked hydrogel macromolecules for membrane supercapacitors

Macromolecular polymer hydrogels used in flexible supercapacitors and batteries have attracted extensive attention in recent years. In this paper, we use a simple polymer interpenetrating technology involving covalent cross-linking and non-covalent cross-linking aspects based on polyvinyl alcohol and carboxylated chitosan to prepare a flexible polymer hydrogel membrane for supercapacitor. The obtained hydrogel membrane has good flexibility and high ionic conductivity of 2.561 x 10(-2) s.cm(-1). The hydrogel electrode membrane prepared by in-situ polymerization of aniline exhibits an area specific capacitance of 580 mF.cm(-2) at a current density of 0.5 mA.cm(-2). And the symmetric all-gel-state supercapacitor with hydrogel membrane as the gel electrolyte shows a high specific capacitance of 325 mF.cm(-2) at 1.0 mA.cm(-2). We believe that this hydrogel film has considerable application prospects in flexible wearable electronic devices.

But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity! 927-74-2, you can contact me at any time and look forward to more communication. Computed Properties of C4H6O.

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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. In an article, author is Gallo, Salvatore, once mentioned the application of 156-87-6, Name is 3-Aminopropan-1-ol, molecular formula is C3H9NO, molecular weight is 75.11, MDL number is MFCD00008223, category is alcohols-buliding-blocks. Now introduce a scientific discovery about this category, Recommanded Product: 3-Aminopropan-1-ol.

Effect of ionizing radiation on the colorimetric properties of PVA-GTA Xylenol Orange Fricke gel dosimeters

Fricke gel dosimeters were prepared using a matrix based on poly(vinyl-alcohol) chemical cross-linked with glutaraldehyde and loaded with Xylenol Orange. The samples were irradiated with gamma rays to doses in the range of 5-30 Gy and the consequent color changes were investigated by using spectrophotometric and colorimetric techniques. Starting from the measurement of the transmittance spectra, an analysis of the color of the dosimeters was carried out considering the CIELAB color space. It allowed to highlight correlations between the color coordinates and the dose. Furthermore, the auto-oxidation processes occurring in the samples were studied by colorimetric measurements on both un-irradiated and irradiated samples at different times, up to two-week post-irradiation. The results showed no significant differences in the oxidation effect on the dosimeters, at least in the investigated dose interval. The study suggested that colorimetric analysis, combined with the spectrophotometric one, can be a useful tool for characterizing the samples in view of a standardization of Fricke gel dosimetry.

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In an article, author is Chen, Xiaosui, once mentioned the application of 16545-68-9, Name is Cyclopropanol, molecular formula is C3H6O, molecular weight is 58.0791, MDL number is MFCD19707103, category is alcohols-buliding-blocks. Now introduce a scientific discovery about this category, Recommanded Product: 16545-68-9.

A facile and robust route to polyvinyl alcohol-based triboelectric nanogenerator containing flame-retardant polyelectrolyte with improved output performance and fire safety

Harvesting energy from various ambient mechanical vibrations and motions is a promising green technology to provide electrical power for integrated electronic devices or sensors. However, some applications of the triboelectric nanogenerators (TENGs) in harsh environment faces challenges of fire safety. Herein, we proposed a facile, robust, and low-cost solution-casting method to prepare flame-resistant triboelectric polymer of polyvinyl alcohol (PVA) by doping PPA-PEI polyelectrolyte synthesized from phenyl phosphonic acid and branched polyethyleneimine. The PVA/PPA-PEI film containing 10 wt% PPA-PEI not only self-extinguished immediately after the burner moved away while the neat PVA film burned thoroughly, but also showed the minimum peak heat release rate (PHRR) of 148.7 +/- 4.2 W/g with a reduction of similar to 47.8%. Contributed by the hybrid of electron and ion transfer on the triboelectric layers during the electrification process, the resultant PVA/10 wt% PPA-PEI: PVDF flame-retarding TENG also exhibited the maximum open-circuit voltage of 28.8 +/- 0.4 V, short-circuit current of 62.3 +/- 5.4 mu A, and power of 228.8 mu W, which were respectively 50.0%, 170.0%, and 57.4% higher than those of the pristine PVA: PVDF TENG when mechanically excited by a dynamic mechanical analyzer (DMA) working at 2000 mu m and 10 Hz. The incorporation of flame-retardant polyelectrolyte into common polymers provides a promising pathway to make traditional TENGs with both enhanced flame retardancy and electrical output.

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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. 927-74-2, Name is 3-Butyn-1-ol, molecular formula is C4H6O, belongs to alcohols-buliding-blocks compound, is a common compound. In a patnet, author is Dong, Mengxian, once mentioned the new application about 927-74-2, Application In Synthesis of 3-Butyn-1-ol.

Highly enantioselective transfer hydrogenation catalyzed by diasteromeric mixtures of axially chiral (aR,S)- and (aS,S)-Biscarbolines

The mixtures of axially chiral (aR,S)- and (aS,S)-biscarboline alcohols were firstly used as catalysts in enantioselective 1,2- and 1,4-transfer hydrogenations of ketimines and beta-enamino esters, respectively. This mixed axially chiral catalysts exhibited excellent enantioselectivity (up to 98%ee) in the transfer hydrogenations under mild reaction conditions. (C) 2021 Elsevier Ltd. All rights reserved.

We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, 927-74-2. The above is the message from the blog manager. Application In Synthesis of 3-Butyn-1-ol.

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Chemistry, like all the natural sciences, begins with the direct observation of nature¡ª in this case, of matter.2516-33-8, Name is Cyclopropylmethanol, SMILES is OCC1CC1, belongs to alcohols-buliding-blocks compound. In a document, author is Lewis, Ben, introduce the new discover, COA of Formula: C4H8O.

The impact of emotional face stimuli on working memory performance among men and women with alcohol use disorder

Background: Individuals with alcohol use disorder (AUD) often display compromise in emotional processing and non-affective neurocognitive functions. However, relatively little empirical work explores their intersection. In this study, we examined working memory performance when attending to and ignoring facial stimuli among adults with and without AUD. We anticipated poorer performance in the AUD group, particularly when task demands involved ignoring facial stimuli. Whether this relationship was moderated by facial emotion or participant sex were explored as empirical questions. Methods: Fifty-six controls (30 women) and 56 treatment-seekers with AUD (14 women) completed task conditions in which performance was advantaged by either attending to or ignoring facial stimuli, including happy, neutral, or fearful faces. Group, sex, and their interaction were independent factors in all models. Efficiency (accuracy/response time) was the primary outcome of interest. Results: An interaction between group and condition (F-1,F-107 = 6.03, p < .02) was detected. Individual comparisons suggested this interaction was driven by AUD-associated performance deficits when ignoring faces, whereas performance was equivalent between groups when faces were attended. Secondary analyses suggested little influence of specific facial emotions on these effects. Conclusions: These data provide partial support for initial hypotheses, with the AUD group demonstrating poorer working memory performance conditioned on the inability to ignore irrelevant emotional face stimuli. The absence of group differences when scenes were to be ignored (faces remembered) suggests the AUD-associated inability to ignore irrelevance is influenced by specific stimulus qualities. 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 2516-33-8 is helpful to your research. COA of Formula: C4H8O.

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Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 2516-33-8, Name is Cyclopropylmethanol, molecular formula is C4H8O. In an article, author is Morojele, Neo K.,once mentioned of 2516-33-8, Product Details of 2516-33-8.

Alcohol consumption, harms and policy developments in sub-Saharan Africa: The case for stronger national and regional responses

Issues Sub-Saharan Africa (SSA) has long been characterised as a region with weak alcohol policies, high proportions of abstainers and heavy episodic drinkers (among drinkers), and as a target for market expansion by global alcohol producers. However, inter-regional analyses of these issues are seldom conducted. Approach Focusing mainly on the period 2000-2016, we compare alcohol consumption and harms, alcohol policy developments and alcohol industry activities over time and across the four sub-regions of SSA. Key Findings Per-capita consumption of alcohol and alcohol-related disease burden have increased in Central Africa but stabilised or reduced in other regions, although they are still high. Most countries have implemented tax policies, but they have seldom adopted other World Health Organization ‘best buys’ for cost-effective alcohol control policies. Countries range from having minimal alcohol controls to having total bans (e.g. some Muslim-majority countries); and some, such as Botswana, have attempted stringent tax policies to address alcohol harm. Alcohol producers have continued their aggressive marketing and policy interference activities, some of which have been highlighted and, in a few instances, resisted by civil society and public health advocates, particularly in southern Africa. Implications Increased government support and commitment are needed to be able to adopt and implement effective alcohol policies and respond to pressures from alcohol companies to which SSA remains a target market. Conclusion SSA needs effective alcohol control measures in order to reverse the trajectory of worsening alcohol harms observed in some countries and reinforce improvements in alcohol harms observed in others.

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Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 156-87-6, Name is 3-Aminopropan-1-ol, SMILES is OCCCN, belongs to alcohols-buliding-blocks compound. In a document, author is Monteiro, Alefe Brito, introduce the new discover, Computed Properties of C3H9NO.

Pharmacological Studies on Cinnamic Alcohol and Its Derivatives

Cinnamic alcohol, cinnamic aldehyde, and cinnamic acid are compounds commonly found in the volatile oil of barks of species in the genus Cinnamomum spp. Schaeff., Lauraceae, popularly known as cinnamon. Cinnamon has been used for millennia for both food and medicinal purposes. The present study reviews the main pharmacological studies on cinnamic alcohol and its derivatives, in order to stress out that cinnamon is a natural product, enriched with compounds endowed of important pharmacological effects that can be benefic to the human health. As a literature review using a qualitative approach, covering articles published between 1970 and 2020, the databases consulted were Pubmed, Web of Science, Science Direct, and Scopus. The following descriptors were searched: cinnamon, cinnamic alcohol, cinnamyl alcohol, cinnamaldehyde, cinnamic aldehyde, cinnamic acid, and benzoate. We selected 32 articles studying non-clinical pharmacological aspects of cinnamic alcohol and its derivatives, with emphasis on their central nervous system activities and anti-inflammatory, antioxidant, and antimicrobial potential. In conclusion, the present review demonstrates non-clinical evidence for cinnamic alcohol and its derivatives as bioactive compounds with pharmacological importance, yet we note the lack of clinical studies.

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 156-87-6 is helpful to your research. Computed Properties of C3H9NO.

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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, 616-29-5, Name is 1,3-Diaminopropan-2-ol, SMILES is C(C(CN)O)N, in an article , author is Grajales-Gonzalez, E., once mentioned of 616-29-5, Computed Properties of C3H10N2O.

A theoretical study of the H- and HOO-assisted propen-2-ol tautomerizations: Reactive systems to evaluate collision efficiency definitions on chemically activated reactions using SS-QRRK theory

In combustion, enols can undergo keto-enol tautomerizations, which are intermediate steps in the formation of pollutant species. In this work, we performed a theoretical kinetic study of the step-wise propen-2-ol tautomerization catalyzed by hydrogen and hydroperoxyl radicals. Ab initio calculations at the CCSD(T)/aug-cc-pVTZ//M06-2X/cc-pVTZ level were run, and rate constants were calculated using the multistructural torsional variational transition state theory with small-curvature tunneling corrections. Hydrogen and hydroperoxyl radicals can induce a step-wise mechanism toward keto formation with a lower barrier than that of unimolecular tautomerization. The potential energy surface comprising these reactions is complex, involving different intermediates that are connected by different types of pathways. The hydrogen-assisted tautomerization consists of two steps where the formation of an intermediate radical takes place as a result of the addition of the hydrogen atom to the double bond of propen-2-ol. The high-pressure limit rate constants of the reactions of this intermediate radical toward propen-2-ol and acetone exhibit an Arrhenius behavior, in agreement with previous works. In the hydroperoxyl-assisted tautomerization, the acetone formation has two routes involving an overall of four steps. The route with the highest energy barrier becomes prominent above 800 K due to multistructural anharmonicity effects, which must be included for an accurate kinetic description of the titled reactions. Calculations of pressure-dependent rate constants showed that the original system-specific quantum Rice-RamspergerKassel theory, together with the modified strong collision model (SS-QRRK/MSC), significantly underpredict the bimolecular stabilization rate constants for the hydrogen-assisted tautomerization above 1200 K by factors of up to three orders of magnitude when compared with the benchmark Rice-RamspergerKassel-Markus/master equation method. To solve this problem, we tested two alternative definitions of the collision efficiency parameter by using an improved implementation of the SS-QRRK/MSC approach developed by us for chemically activated reactions. One of these definitions, provided by Gilbert et al. (1983), corrected the bimolecular stabilization rate constant behavior and yielded a maximum deviation factor of only 4.5 at 2000 K and 100 atm. For the hydroperoxyl-assisted tautomerization, pressure effects are negligible because the stabilization of the energized adduct cannot compete with the reaction leading to the final product for most of the physical conditions studied. Our calculated rate constants can be used to perform more accurate kinetic modeling of alcohols. Besides, the implementation of the SS-QRRK theory with the collision efficiency of Gilbert et al. (1983) proposed in this work is useful for computing pressure-dependent rate constants of chemically activated reactions, including all possible refinements (multi-dimensional tunneling, multistructural anharmonicity, etc.) considered in high-pressure limit calculations. (C) 2020 The Combustion Institute. Published by Elsevier Inc. All rights reserved.YY

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