Tag: M.W=100-200

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 821-41-0, Name is 5-Hexen-1-ol, SMILES is C=CCCCCO, in an article , author is Sousa, Fagner F., once mentioned of 821-41-0, COA of Formula: C6H12O.

Conservation of ‘Palmer’ mango with an edible coating of hydroxypropyl methylcellulose and beeswax

Mango is a tropical fruit presenting intense postharvest metabolism. In storage at room temperature, it presents a short shelf life due to the high respiratory rate, and consequent ripening, which limits the marketing period in distant regions. This study evaluated the effect of edible coatings of hydroxypropyl methylcellulose and beeswax in concentrations of 10, 20, and 40% in ‘Palmer’ mangoes stored for 15 days at 21 degrees C. The coatings controlled ripening, maintaining peel and pulp colors, firmness, soluble solids (SS), titratable acidity (TA), SS/TA ratio, sugars, ascorbic acid, phenolic compounds, flavonoids, beta-carotene, and antioxidant activity. Also, they reduced weight loss, oxidative stress, and the anthracnose (Colletotrichum gloeosporioides) incidence, without inducing alcohol dehydrogenase activity, which suggests that coated fruit did not ferment. Treatment with 20% beeswax was the most suitable for industrial applications, increasing in six days the mangoes shelf life.

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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 Olivenza-Leon, David,once mentioned of 873-76-7, Safety of (4-Chlorophenyl)methanol.

Proton transfer reaction mass spectrometry investigations of phthalate esters via direct headspace sampling

One of the most common environmentally relevant groups of pollutants are phthalate esters. After decades of industrial use, they have become ubiquitous in the environment and analytical methods to chemically detect them in trace amounts are required. In this study, details of Proton Transfer Reaction-Mass Spectrometry (PTR-MS) investigations for the reactions of phthalic acid and ten phthalate esters with H3O+ as a function of the reduced electric field are presented. A characteristic product ion observed for several of the phthalate esters is protonated phthalic anhydride (m/z 149.02, C8H5O3+). However, not all of the phthalates investigated in this study fragment to produce this product ion following proton transfer. For alkyl diester phthalates, loss of the corresponding alcohol results in the main product ion, but its abundance decreases with increasing alkyl chain length, whilst in comparison for the dialkyl ester phthalates, the protonated phthalic anhydride ion abundance increases with increasing alkyl chain length and with increasing reduced electric field. Collisional induced dissociation in the drift tube of the PTR-MS is shown to be useful as means to manipulate the underlying ion chemistry, leading to unique product ions distinctive to phthalates. The results reported in this work represent a wealth of new data that will be of use for developing a PTR-MS analytical method for the quick, selective and reliable identification of phthalates in the environment. (C) 2020 Elsevier B.V. All rights reserved.

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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. 770-71-8, Name is Adamantan-1-ylmethanol, molecular formula is , belongs to alcohols-buliding-blocks compound. In a document, author is Tang, Peixin, Product Details of 770-71-8.

Daylight-activated fumigant detoxifying nanofibrous membrane based on thiol-ene click chemistry

Daylight-activated detoxifying nanofibrous membranes (LDNMs) are fabricated by grafting benzophenone-3,3′,4,4′-tetracarboxylic dianhydride (BD) and biological thiols successively on poly(vinyl alcohol-co-ethylene) (EVOH) nanofibrous membrane. Taking the merits of photoactivity of BD, high-reactivity of biological thiols, and high specific surface area and porosity of the nanofibrous membrane, 1,3-dichloropropene (1,3-D) can be efficiently detoxified on the LDNMs under daylight irradiation via a thiol-ene click reaction. The detoxification function of the LDNMs is switched on by light irradiation and continues by following a cascade of chemical attacks of thiyl radicals formed during the photoexcitation process. The resultant LDNMs present rapid detoxification rate (i.e., t(1/2) = similar to 30 min) and massive detoxification amount (i.e., similar to 12 mg/g) against 1,3-D vapor under ambient conditions. More importantly, the LDNMs perform a detoxification tailing effect after moving the light-irradiated membrane to a dark environment, thus ensuring the protective function in the absence of sufficient light sources. The detoxification property of the LDNMs in an outdoor environment with sunlight irradiation shows comparable results to the lab-scale outcomes, enabling them to serve as innovative materials for personal protective equipment in practical applications. The successful fabrication of LDNMs may inspire new insights into the design of protective materials providing aggressive protection.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 770-71-8, in my other articles. Product Details of 770-71-8.

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Application of 768-95-6, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C¨CH bond functionalisation has revolutionised modern synthetic chemistry. 768-95-6, Name is Adamantan-1-ol, SMILES is OC12CC3CC(C2)CC(C3)C1, belongs to alcohols-buliding-blocks compound. In a article, author is Wang, Liyan, introduce new discover of the category.

Promotion effect of La on oxygen vacancy formation over Zn-Cr based catalyst for isobutanol synthesis from syngas

A series of catalysts were designed and synthesized via doping lanthanum into ZnCr oxide to realize efficient synthesis of isobutanol from syngas. By applying a combination of characterizations (XRD, TEM, EPR, XPS and in situ FT-IR) and DFT calculations, the effects of lanthanum promoter on catalyst structure and catalytic performance were investigated. With the doping of lanthanum, ZnCrLax composite oxides with a novel catalyst structure were constructed, in which Zn atom at tetrahedron site was partly substituted by doping La atom. The presence of this structure enhanced the formation of more oxygen vacancy sites and further benefitted the CO activation. In addition, formate intermediate was easier to generate and exhibited superior stability over ZnCrLax surface thus leaded to remarkably promoted catalytic activity. The ZnCrLa0.05 catalyst achieved optimum total alcohols selectivity of 61%, and the fraction of isobutanol reached as high as 24.6% under CO conversion of 23%.

Application of 768-95-6, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 768-95-6 is helpful to your research.

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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 Lee, Chia-Kuei, once mentioned the application of 2807-30-9, Name is 2-Propoxyethanol, molecular formula is C5H12O2, molecular weight is 104.1476, MDL number is MFCD00072645, category is alcohols-buliding-blocks. Now introduce a scientific discovery about this category, Category: alcohols-buliding-blocks.

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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Synthetic Route of 3391-86-4, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. 3391-86-4, Name is Oct-1-en-3-ol, SMILES is C=CC(O)CCCCC, belongs to alcohols-buliding-blocks compound. In a article, author is Hamidullah, Shahnaza, introduce new discover of the category.

Effects of vapourized THC and voluntary alcohol drinking during adolescence on cognition, reward, and anxiety-like behaviours in rats

Cannabis and alcohol co-use is prevalent in adolescence, but the long-term behavioural effects of this co-use remain largely unexplored. The aim of this study is to investigate the effects of adolescent alcohol and Delta(9)-tetrahydracannabinol (THC) vapour co-exposure on cognitive- and reward-related behaviours. Male Sprague-Dawley rats received vapourized THC (10 mg vapourized THC/four adolescent rats) or vehicle every other day (from post-natal day (PND) 28-42) and had continuous voluntary access to ethanol (10% volume/volume) in adolescence. Alcohol intake was measured during the exposure period to assess the acute effects of THC on alcohol consumption. In adulthood (PND 56+), rats underwent behavioural testing. Adolescent rats showed higher alcohol preference, assessed using the two-bottle choice test, on days on which they were not exposed to THC vapour. In adulthood, rats that drank alcohol as adolescents exhibited short-term memory deficits and showed decreased alcohol preference; on the other hand, rats exposed to THC vapour showed learning impairments in the delay-discounting task. Vapourized THC, alcohol or their combination had no effect on anxiety-like behaviours in adulthood. Our results show that although adolescent THC exposure acutely affects alcohol drinking, adolescent alcohol and cannabis co-use may not produce long-term additive effects.

Synthetic Route of 3391-86-4, 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 3391-86-4 is helpful to your research.

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Application of 1777-82-8, Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. The appropriate choice of redox mediator can avoid electrode passivation and overpotential. 1777-82-8, Name is (2,4-Dichlorophenyl)methanol, SMILES is OCC1=CC=C(Cl)C=C1Cl, belongs to alcohols-buliding-blocks compound. In a article, author is Enkema, Matthew C., introduce new discover of the category.

Craving management: Exploring factors that influence momentary craving-related risk of cannabis use among young adults

Young adult frequent cannabis use has increased in prevalence and some frequent users have problems reducing their use. A strong link between momentary craving and subsequent use behaviors among individuals with problematic cannabis use has been reported in the literature, including young adults. In treatment contexts, interventions based on associative learning and reinforcement aim to reduce the prevalence of problematic substance use by altering the association between craving and use by increasing craving management skills such as mindfulness and reducing unhelpful responding such as avoidance or suppression. However, this model has not been tested among young adult cannabis users. The current study examined the influence of trait and state craving management strategies (mindfulness, coping style, experiential avoidance, and craving beliefs) on the link between momentary craving and use, using ecological momentary assessment in a sample of young adults with problematic use interested in reducing their use. Results demonstrated that two craving management constructs were associated with use: non-reactivity (p = 0.02) and non-judgment (p < 0.01). Interactions with momentary craving were observed for two constructs: non-judgmentalness (p = 0.02) and craving beliefs (p < 0.01). Findings suggest that treatments that increase non-reactivity and non-judgmentalness may reduce the occurrence of cannabis use for young adults contemplating reduction during an important period of biopsychosocial development by mitigating the impact of craving or directly reducing use. Additionally, negative beliefs about craving may serve a protective function during acute periods of elevation in momentary craving, an unexpected finding deserving further investigation. Application of 1777-82-8, 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 1777-82-8 is helpful to your research.

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Chemistry, like all the natural sciences, begins with the direct observation of nature¡ª in this case, of matter.928-51-8, Name is 4-Chlorobutan-1-ol, SMILES is OCCCCCl, belongs to alcohols-buliding-blocks compound. In a document, author is Johnson, Kimberly Margaret, introduce the new discover, Application In Synthesis of 4-Chlorobutan-1-ol.

Critical Analysis of Laboratory Testing Methodologies When Interpreting Conflicting Results at Autopsy

Toxicological analysis is an important diagnostic component of a postmortem examination and may involve both antemortem and postmortem specimens. Here, we present a case in which an antemortem specimen, when reanalyzed in the forensic toxicology laboratory, resulted in values that contradicted the reported values from the medical record and required further investigation. This case involves a 51-year-old man decedent with a medical history of chronic alcohol abuse. His antemortem urine drug screen, performed upon admission to an emergency department, was negative. His serum blood alcohol level at presentation was reported as 0.960 g/dL and, repeated 4 hours later, was 0.500 g/dL with a comment indicating that there was significant lipemia interfering with the results. At autopsy, the antemortem blood sample collected from the hospital, postmortem blood, and vitreous humor samples were analyzed and all 3 samples were found to be negative for ethanol. The hospital laboratory used an enzymatic assay for ethanol detection, which is known to be impacted by lipemia, and the forensic laboratory used head-space gas chromatography, which is not impacted by lipemia. This highlights the need to critically analyze laboratory testing methodologies when interpreting conflicting results at autopsy.

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 928-51-8 is helpful to your research. Application In Synthesis of 4-Chlorobutan-1-ol.

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Chemistry, like all the natural sciences, Formula: C4H8O3, begins with the direct observation of nature¡ª in this case, of matter.6149-41-3, Name is Methyl 3-hydroxypropanoate, SMILES is O=C(OC)CCO, belongs to alcohols-buliding-blocks compound. In a document, author is Li, Yi-Yi, introduce the new discover.

Theoretical study of heat transfer enhancement mechanism of high alcohol surfactant in spray cooling

High alcohol surfactant could enhance spray cooling heat transfer, however the enhancing mechanism had not been identified. The present work used numerical model of spray cooling for high alcohol surfactant to specify the mechanism. After adding high alcohol surfactant, the spray characteristics and fluid properties were changed. The influences of these factors on heat transfer were studied, and it was found that the enhancement of heat transfer was mainly attributed to the effect of high alcohol surfactant on surface tension and droplet diameter: the decrease of surface tension and increase of droplet diameter made liquid film thicker and faster, and the lager liquid film thickness and velocity were helpful to take away the heat with a better flow. Both parameters were included in Weber number of droplets, and it could be concluded that high alcohol surfactant improved spray cooling performance mainly because of the increased Weber number. The dominant heat transfer mechanism was also discussed in the analysis of the effect of spray flow.

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 6149-41-3. Formula: C4H8O3.

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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 C6H15NO3, 6338-55-2, Name is 2-(2-(2-Aminoethoxy)ethoxy)ethanol, SMILES is NCCOCCOCCO, in an article , author is Gaur, Surendra Singh, once mentioned of 6338-55-2.

Ion transfer channel network formed by flower and rod shape crystals of hair hydrolysate in poly(vinyl alcohol) matrix and its application as anion exchange membrane in fuel cells

Ion transfer phenomena occurring in nature are known to be most efficient. Many efforts have been made to mimic such phenomena, especially in the area of energy transfer. Proteins consisting of various amino acids are known to be the fundamental materials behind these phenomena. In the current study, an effort was made to extract proteinaceous material from human hair bio-waste by a green chemical-free thermal hydrolysis process. A simple heat treatment of the human hairs in presence of water led to the formation of a water soluble material, which was called hair hydrolysate (HH), contains 70 wt% proteinaceous material. It was utilized for the fabrication of poly(vinyl alcohol) (PVA) matrix-based anion exchange membrane (AEM). Presence of 27 wt% charged amino acids and 19 wt% polarizable amino acids in the HH provided effective charge transfer sites. 7 wt% arginine present in the HH, having continuous delocalized net positive charge helped the membrane to be stable in highly alkaline conditions, which was confirmed by an indirect analysis of alkaline stability. Formation of rod and flower shaped crystal morphology by the HH in glutaraldehyde crosslinked PVA matrix, created a continuous channel network at higher loadings, which provided a simple path for ion transfer, achieving OHconductivity of 7.46 mS/cm at 70 degrees C. Swelling of the PVA matrix was minimized by annealing of the HH loaded sample, which resulted in reduction of ionic conductivity to 6.16 mS/cm (at 70 degrees C). At the same time, improvement in the properties like increase in thermal, mechanical and thermo-mechanical stability, reduction in water uptake, %swelling and methanol permeability was observed. The selectivity of the membrane was increased to almost a decimal place. Thus, the HH obtained from simple green thermal hydrolysis of human hair bio-waste is a cheap material, which is found to be suitable as ion conductive material for alkaline fuel cells. (c) 2020 Elsevier Inc. All rights reserved.

But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity! 6338-55-2, you can contact me at any time and look forward to more communication. Computed Properties of C6H15NO3.

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