Month: April 2021

In an article, author is Shewale, Jitesh B., once mentioned the application of 105-13-5, Category: alcohols-buliding-blocks, Name is (4-Methoxyphenyl)methanol, molecular formula is C8H10O2, molecular weight is 138.16, MDL number is MFCD00004653, category is alcohols-buliding-blocks. Now introduce a scientific discovery about this category.

Independent association of marijuana use and poor oral hygiene with HPV-negative but not HPV-positive head and neck squamous cell carcinomas

Background Sexual behavior is associated with human papillomavirus (HPV)-positive head and neck cancer, whereas tobacco and alcohol use are associated with HPV-negative cancer. A case-control study was designed to investigate additional demographic and behavioral factors independently associated with these distinct oral cancers. Methods From 2011 to 2014, 249 newly diagnosed oral cavity and oropharyngeal squamous cell carcinoma (OSCC) cases were matched (1:2) on age, gender, and self-identified race to 498 controls without a cancer history attending the outpatient otolaryngology clinic at The Ohio State University in Columbus. Cases were stratified by detection of high-risk HPV DNA and RNA in tumors. Demographic and behavioral data were collected using an audio computer-assisted self-interview, and associations with HPV-positive versus HPV-negative OSCCs were investigated by use of univariable and multivariable conditional logistic regression models. Results After adjustment for oral sexual behavior, the odds of HPV-positive cancer decreased with the patient’s years of education. Annual income, tobacco smoking, alcohol drinking, marijuana smoking, and poor oral hygiene were not associated with HPV-positive OSCC. In contrast, the odds of HPV-negative OSCC increased independently with decreased annual income, decreased with a high number of marijuana hit-years, and increased with fewer than annual dental visits after adjustment for lifetime tobacco and alcohol use. Sexual behavior and education were not associated with HPV-negative OSCC. Conclusions The distinct risk-factor profiles for HPV-positive and HPV-negative OSCC are confirmed and extended in this case-control study, thus supporting 2 principal etiological pathways for OSCC development. Lay Summary Sexually acquired human papillomavirus (HPV) infection is an established cause of tonsil and base of tongue cancers. This study compared and contrasted risk factors for HPV-positive and HPV-negative oral cancers. Low number of years of education and sexual behavior are associated with HPV-positive cancer. In contrast, low annual income, infrequent dental visits, and tobacco and alcohol use are associated with HPV-negative cancers. Long-term marijuana use appears protective for HPV-negative cancer. Public health efforts to address these modifiable risk factors may prevent oral cancer.

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Related Products of 3068-00-6, 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. 3068-00-6, Name is 1,2,4-Butanetriol, SMILES is OCC(O)CCO, belongs to alcohols-buliding-blocks compound. In a article, author is Jain, Prarabdh, introduce new discover of the category.

Color removal from model dye effluent using PVA-GA hydrogel beads

A low cost polyvinyl alcohol-glutaraldehyde cross-linked hydrogel beads were prepared and used for color removal from model industrial effluent containing Congo Red dye, using adsorption technique. The adsorption studies were performed using batch and fixed-bed reactor. Developed adsorbent, achieved adsorption capacity as high as similar to 34 mg of dye per gram of bead (condition: pH 6 and 45 degrees C). These beads were re-used for 7 times (many more runs possible) to remove the color from model dye effluent, without much loss in removal efficiency. Batch studies revealed a multi-layer adsorption governed by Harkins Jura model. Whereas the adsorption kinetics followed fractal like pseudo second order model, controlled by intraparticle diffusion phenomena. The fixed bed studies revealed steeper break through curves during adsorption operation when high dye influent rates and low bed height were used. This behaviour by the fixed bed reactor was best explained by the Thomas mathematical model. Studies further demonstrated that an external and internal mass diffusion become no more rate limiting during these experiments.

Related Products of 3068-00-6, 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 3068-00-6 is helpful to your research.

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In an article, author is Wang, Weizheng, once mentioned the application of 135261-74-4, Safety of 1-(Dimethylamino)-3-(2-(3-methoxyphenethyl)phenoxy)propan-2-ol hydrochloride, Name is 1-(Dimethylamino)-3-(2-(3-methoxyphenethyl)phenoxy)propan-2-ol hydrochloride, molecular formula is C20H28ClNO3, molecular weight is 365.8942, MDL number is MFCD01697013, category is alcohols-buliding-blocks. Now introduce a scientific discovery about this category.

Comparison of determination of sugar-PMP derivatives by two different stationary phases and two HPLC detectors: C-18 vs. amide columns and DAD vs. ELSD

Reducing sugars, especially aldoses with their ring structures, have strong reducibility to react with 1-phenyl-3-methyl-5-pyrazolone (PMP) to form sugar-PMP derivatives detected by ultraviolet (UV) detector at 248 nm. In this study, several carbohydrates and some of their alcohols, including 1). seven main monosaccharides, 2). three common disaccharides, 3). two oligosaccharides, and 4). some sweeteners like sugar alcohols were investigated for their reactivities with PMP. Analytes were separated chromatographically by two common high performance liquid chromatography (HPLC) columns and subsequently detected by two tandem detectors. Results pointed out that C-18 column had a stronger capacity to separate the reducing sugar-PMP derivatives rather than the sugar themselves. While amide column could only effectively separate the original sugars. These phenomena demonstrated that polarity of reducing sugars decreased after their PMP derivatization. Moreover, both diode array detector (DAD) and evaporative light scattering detector (ELSD) were able to detect the reducing sugar-PMP derivatives, including the PMP-derivative of the oligosaccharide hydrolysate of chitosan, though the DAD exhibits a higher sensitivity than ELSD. In conclusion, carbohydrates themselves are more likely to be efficiently separated by an amide column and detected by ELSD, while DAD combined with a C-18 column has more power to determine carbohydrates derivatives.

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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. 3068-00-6, Name is 1,2,4-Butanetriol, molecular formula is C4H10O3, belongs to alcohols-buliding-blocks compound, is a common compound. In a patnet, author is Doran, Neal, once mentioned the new application about 3068-00-6, Safety of 1,2,4-Butanetriol.

Post-legalization changes in marijuana use in a sample of young California adults

Introduction: Increasing marijuana use among young adults is a concern due to substantial acute and chronic health risks. More widespread use of marijuana may also lead to increased use of nicotine and tobacco products. California legalized commercial sales of marijuana for recreational use as of January 2018. To our knowledge no studies to date have examined subsequent changes in marijuana use. The goal of this study was to test the hypothesis that marijuana use frequency increased following legalization of recreational sales. We also hypothesized that increased marijuana frequency would predict greater frequency of nicotine/tobacco consumption. Methods: The study was a secondary analysis of a longitudinal study of tobacco use among non-daily cigarette smokers. Participants were 563 young adults (aged 18-24) enrolled in 2015-16 and followed quarterly for 3 years. Results: A piecewise multilevel regression model indicated that marijuana use frequency did not change over time, including following legalization. More frequent use was associated with younger age and identifying as white (ps < 0.001, which did not change after legalization. Marijuana frequency was moderated by sex (p < .001), with women reporting increasing and men decreasing use over time. It was also associated with tobacco use, and particularly with e-cigarette use following legalization (ps < 0.05). Conclusions: Findings suggest legalization of recreational marijuana sales had a negligible overall impact on days of use among young adults, but may have prompted increased interest in marijuana among some, particularly women and e-cigarette users. The continuously evolving landscape around these products indicates that ongoing surveillance is critical. We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, 3068-00-6. The above is the message from the blog manager. Safety of 1,2,4-Butanetriol.

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Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 3068-00-6, Name is 1,2,4-Butanetriol, molecular formula is C4H10O3. In an article, author is Marquez-Rodriguez, A. S.,once mentioned of 3068-00-6, Category: alcohols-buliding-blocks.

Disaccharide anthocyanin delphinidin 3-O-sambubioside from Hibiscus sabdariffa L.: Candida antarctica lipase B-catalyzed fatty acid acylation and study of its color properties

Enzymatic lipophilization is an important process to extend the use of anthocyanins in lipidic media. In this work delphinidin 3-O-sambubioside (Dp3sam) isolated from Hibiscus sabdariffa L. flower was esterified with octanoic acid using Candida antarctica lipase B. The physical-chemical properties of the new lipophilic pigment were studied by UV-vis spectroscopy. Dp3sam with chloride, acetate and formate as counter ions were employed to study the lipophilization reaction. The hydrolysis of the reagent was avoided with a formate counter ion and the expected product was achieved with a noteworthy change of solubility. 1D and 2D NMR characterization of Dp3sam-C8 confirmed that the lipophilization took place at the primary alcohol of the glucoside moiety. Overall, the Dp3sam-C8 ester presents a stabilization of the quinoidal base (blue color) at neutral or moderate alkaline pH, which foresees a potential use of this pigment as a broad kind of industries on lipo-soluble formulations.

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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, Recommanded Product: 13325-10-513325-10-5, Name is 4-Aminobutan-1-ol, SMILES is OCCCCN, belongs to alcohols-buliding-blocks compound. In a article, author is Xue, Yudong, introduce new discover of the category.

Persulfate activation by ZIF-67-derived cobalt/nitrogen-doped carbon composites: Kinetics and mechanisms dependent on persulfate precursor

Whereas previous studies that explored the application of metal-carbon composites as persulfate activators have focused on synergistic performance improvements, the potential advantages or features that can be acquired by integrating metal and carbon constituents that differ in terms of reactivity toward persulfate precursors and their preferred activation routes have been overlooked. With ZIF-67-derived cobalt/N-doped carbon composites (Co@N-C) as the model metal-carbon composite, this study takes a look into a switch in the primary degradative pathway depending on the persulfate precursor used and investigates this kind of composite fabrication as a strategy to overcome the drawbacks of single-component activators. In Co@N-C, Co embedded in the carbon matrix caused radical-induced oxidation in the presence of peroxymonosulfate (PMS) whereas peroxydisulfate (PDS) activation using a carbon framework involved mediated electron transfer. The different nature of the dominant oxidant was confirmed by investigating the quenching effects of alcohols, bromate formation yield, substrate-specificity, electron paramagnetic resonance spectral features, current generation upon sequential organic and persulfate injection, and product distribution. The Co and N-doped carbon serving as separate reactive sites allowed Co@N-C to exploit both PMS and PDS so it could outperform benchmark metaland carbon-derived materials. Electrochemical measurements linked with X-ray spectroscopic analysis implied that a moderate pyrolysis temperature optimized the Co@N-C activity due to high fractions of graphitic N and Co-N species. Density functional theory calculations reveal that the peroxide bond of PMS is more susceptible to elongation over Co@N-C, thus it is preferentially dissociated to yield sulfate radicals.

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 13325-10-5. Recommanded Product: 13325-10-5.

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Application of 5187-23-5, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C¨CH bond functionalisation has revolutionised modern synthetic chemistry. 5187-23-5, Name is (5-Ethyl-1,3-dioxan-5-yl)methanol, SMILES is CCC1(CO)COCOC1, belongs to alcohols-buliding-blocks compound. In a article, author is Sun, Jingjing, introduce new discover of the category.

Synthesis and electrochemical properties of V(2)O(5)(center dot)nH(2)O compound with reduced graphene oxide/polyvinyl alcohol film as the free-standing cathode for coin-typed aqueous Zn-ion batteries

Recently aqueous zinc-ion batteries (AZIBs) have been widely studied on the aspects of electrode materials and electrolytes, but it is still far from practical application. The limitation of AZIBs is that it is difficult to have both high specific capacity and good cycle stability. Herein, a free-standing cathode V(2)O(5)(center dot)nH(2)O/reduced graphene oxide-polyvinyl alcohol (denoted as V(2)O(5)(center dot)nH(2)O/rGO-PVA) film was synthesized by one-step hydrothermal method and vacuum filtration. As the cathode for the coin-typed AZIBs, the V(2)O(5)(center dot)nH(2)O/rGO-PVA film cathode delivers the ultrahigh capacity of 553 mA h g(-1) at the current density of 0.1 A g(-1). And the capacity is 194 mA h g(-1) at 0.5 A g(-1), after 300 cycles, it still remains 152 mA h g(-1). At the power density of 183 W.kg(-1), the high energy density is calculated as 354 Wh.kg(-1) based on the mass of the cathode. The energy storage mechanism was studied by some ex-situ characterizations as well. This work not only proposes a strategy for the synthesis of V(2)O(5)(center dot)nH(2)O/rGO-PVA film, but also demonstrates that the as-obtained free-standing cathode is beneficial to the assembly of coin-typed AZIBs and exhibits excellent electrochemical performance.

Application of 5187-23-5, 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 5187-23-5.

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Application of 4461-39-6, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C¨CH bond functionalisation has revolutionised modern synthetic chemistry. 4461-39-6, Name is N-(2-Hydroxyethyl)-1,3-propanediamine, SMILES is NCCCNCCO, belongs to alcohols-buliding-blocks compound. In a article, author is Jones, David S., introduce new discover of the category.

Drug release from hydroxypropylcellulose gels cannot be statistically predicted from their viscometric and initial viscoelastic properties

This study questioned whether rheological properties can predict drug (metronidazole) release from Hydroxypropylcellulose (HPC) platforms. Viscometric and viscoelastic properties of aqueous, alcohols/diols and mixed solvent HPC solutions and gels were determined using viscometry and oscillatory analysis. Drug release was conducted at pH 7.4 under sink conditions. Relationships between rheological parameters and drug release were modelled using multiple linear stepwise regression. Viscometry identified ethanol and water as good solvents for HPC. Diol solvents were predicted to exhibit greater interactions with HPC (COSMO modelling) but possessed lowest intrinsic viscosities. Pentanediol or ethylene glycol prepared gels exhibited greatest elasticity. No relationships were observed between dilute solution properties and initial gel viscoelasticity. Drug release from HPC gels occurred via gel erosion and diffusion. No relationships were observed between initial gel viscoelasticity and drug release and thus, for gel platforms that undergo erosion in aqueous media, drug release cannot be predicted from initial gel viscoelasticity.

Application of 4461-39-6, One of the oldest and most widely used commercial enzyme inhibitors is aspirin, which selectively inhibits one of the enzymes involved in the synthesis of molecules that trigger inflammation. you can also check out more blogs about 4461-39-6.

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Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 156-87-6, Name is 3-Aminopropan-1-ol, molecular formula is , belongs to alcohols-buliding-blocks compound. In a document, author is Radosi, Alexandra, Category: alcohols-buliding-blocks.

The association between reinforcement sensitivity and substance use is mediated by individual differences in dispositional affectivity in adolescents

Background: Adolescence marks the onset of substance use experimentation and adolescents are particularly vulnerable to certain negative effects of substances. Some evidence indicates reinforcement sensitivity is associated with substance use, though little is known about mechanisms underlying such association. Aims: in the current study were to examine, (1) associations between behavioral activation (BAS) and behavioral inhibition (BIS) system sensitivity, positive (PA) and negative affectivity (NA), and alcohol use and alcohol problems as well as tobacco, and marijuana use, and whether (2) associations are mediated by PA or NA. Methods: Participants were a community sample of N = 125 adolescents (M-age = 15.67 years; SD = 0.93; 52% boys) who completed self-report measures. Results: evinced associations, generally as expected, across variables (all ps < 0.05). In mediation analyses, an association emerged between BIS sensitivity and alcohol use, mediated by NA (95%CIs [0.034; 0.390]); greater BIS sensitivity was associated with greater NA and greater NA was associated with greater alcohol use. These findings were replicated with alcohol problems. An association also emerged between BAS sensitivity and marijuana use, mediated by PA (95%CIs [-0.296; -0.027]); greater BAS sensitivity was associated with greater PA and greater PA was associated with lower marijuana use. Finally, BIS sensitivity was associated with tobacco use through NA (95%CIs [0.023; 0.325]) and PA (95%CIs [0.004; 0.116]), with NA linked to greater, but PA linked to lower tobacco use. BAS sensitivity was also associated with tobacco use through PA (95%CIs [-0.395; -0.049]), with PA linked again to lower tobacco use. Conclusions: There are unique and shared effects of domains of reinforcement sensitivity on adolescent substance use and these vary with index of dispositional affectivity and type of substance considered. If you are hungry for even more, make sure to check my other article about 156-87-6, Category: alcohols-buliding-blocks.

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Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , Safety of (4-Chlorophenyl)methanol, 873-76-7, Name is (4-Chlorophenyl)methanol, molecular formula is C7H7ClO, belongs to alcohols-buliding-blocks compound. In a document, author is Guo, Xiaoqing, introduce the new discover.

Functional applications and luminescence properties of emission tunable phosphors CaMoO4@SiO2:Ln(3+) (Ln=Eu, Tb, Dy)

In this present work, a room temperature coprecipitation method for the synthesis of CaMoO4@SiO2:Ln (Eu3+, Tb3+, Dy3+) phosphors was reported. These particles were characterized using X-ray diffraction (XRD), Energy dispersive spectrometer (EDS), Fourier Transform IR spectroscopy (FTIR), scanning electron microscope (SEM), UV-visible spectrophotometer and photoluminescence (PL) respectively. The results indicated that emission intensity of SiO2 modified samples increased by about 2 times, compared with no-silica modified samples. Multicolor phosphors were also designed by changing the lattice activators (Eu3+, Tb3+, Dy3+). To further explore its applications, the transparent photoluminescent film was developed through the incorporation of polyvinyl alcohol (PVA), and selective and sensitive detection performance on dichromate was demonstrated in detail. In addition, red emission LED devices was assembled with as-prepared phosphors. The present results provide not only the high-performance phosphors modified by silica, but also a deep explanation of the structure-property relationship of the as-prepared sample. Based on these findings, it can be foreseen that these microparticles will be applied in versatile filed. (C) 2020 Elsevier B.V. All rights reserved.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 873-76-7. Safety of (4-Chlorophenyl)methanol.

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