Tag: M.W=100-200

Synthetic Route 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 Kalong, Munsuree, introduce new discover of the category.

Hydrogen-free hydrogenation of furfural to furfuryl alcohol and 2-methyl-furan over Ni and Co-promoted Cu/gamma-Al2O3 catalysts

Catalytic transformation of furfural to furfuryl alcohol and 2-methylfuran without H-2 supply toward transfer hydrogenation process using 2-propanol as a H-2 source was systematically investigated over the bimetallic NiCuAl and CoCuAl catalysts in comparison with the monometallic CuAl, NiAl, and CoAl catalysts. The XRD analysis confirmed the generation of Ni-Cu and Co-Cu alloys after the reduction in presence of H-2. The interaction between Cu and Ni or Co resulted in a simplicity of the reduction behavior of Ni and Co species observed in H-2-TPR experiments. It was evident from pyridine adsorption FTIR analysis that the formation of bimetallic NiCu and Co-Cu alloys apparently improved the stronger Lewis acidic sites. The influences of reaction temperature and time were examined and optimized to maximize the yields of furfuryl alcohol and 2-methylfuran. The highest two major products yield and selectivity with lower by-products were obtained over the NiCuAl and CoCuAl catalysts compared with the CuAl and NiAl catalysts. The superior performance of the bimetallic catalysts was attributed to the stronger Lewis acidic centre on the catalyst surface. The CoCuAl catalyst was found to have lower catalyst deactivation and carbon deposition among the CuAl and NiCuAl catalysts under H-2-free atmosphere.

Synthetic Route of 768-95-6, 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 768-95-6 is helpful to your research.

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In an article, author is Chen, Zhangling, once mentioned the application of 770-71-8, Product Details of 770-71-8, Name is Adamantan-1-ylmethanol, molecular formula is C11H18O, molecular weight is 166.26, MDL number is MFCD00074751, category is alcohols-buliding-blocks. Now introduce a scientific discovery about this category.

Changes in Plant-Based Diet Indices and Subsequent Risk of Type 2 Diabetes in Women and Men: Three US Prospective Cohorts

OBJECTIVE We evaluated the associations between changes in plant-based diets and subsequent risk of type 2 diabetes. RESEARCH DESIGN AND METHODS We prospectively followed 76,530 women in the Nurses’ Health Study (NHS) (1986-2012), 81,569 women in NHS II (1991-2017), and 34,468 men in the Health Professionals Follow-up Study (1986-2016). Adherence to plant-based diets was assessed every 4 years with the overall plant-based diet index (PDI), healthful PDI (hPDI), and unhealthful PDI (uPDI). We used multivariable Cox proportional hazards models to estimate hazard ratios (HRs). We pooled results of the three cohorts using meta-analysis. RESULTS We documented 12,627 cases of type 2 diabetes during 2,955,350 person-years of follow-up. After adjustment for initial BMI and initial and 4-year changes in alcohol intake, smoking, physical activity, and other factors, compared with participants whose indices remained relatively stable (+/- 3%), participants with the largest decrease (>10%) in PDI and hPDI over 4 years had a 12-23% higher diabetes risk in the subsequent 4 years (pooled HR, PDI 1.12 [95% CI 1.05, 1.20], hPDI 1.23 [1.16, 1.31]). Each 10% increment in PDI and hPDI over 4 years was associated with a 7-9% lower risk (PDI 0.93 [0.91, 0.95], hPDI 0.91 [0.87, 0.95]). Changes in uPDI were not associated with diabetes risk. Weight changes accounted for 6.0-35.6% of the associations between changes in PDI and hPDI and diabetes risk. CONCLUSIONS Improving adherence to overall and healthful plant-based diets was associated with a lower risk of type 2 diabetes, whereas decreased adherence to such diets was associated with a higher risk.

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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 Ge, Wenjiao, once mentioned the application of 27646-80-6, Name is 2-Methyl-2-(methylamino)propan-1-ol, molecular formula is C5H13NO, molecular weight is 103.17, MDL number is MFCD12184529, category is alcohols-buliding-blocks. Now introduce a scientific discovery about this category, Computed Properties of C5H13NO.

Nanocellulose/LiCl systems enable conductive and stretchable electrolyte hydrogels with tolerance to dehydration and extreme cold conditions

Ionically-conductive and stretchable hydrogels are ideally suited for the synthesis of flexible electronic devices. However, conventional hydrogels undergo dehydration at ambient conditions and freeze at subzero temperatures, limiting their functions. As an alternative to counteract these limitations, we propose double network hydrogels that are easily synthesized by a one-step acrylamide (AM) polymerization in the presence of cellulose nanofibrils (CNF) and LiCl. Following molecular dynamics simulation, thermogravimetric and spectroscopic (Raman and low-field nuclear magnetic resonance) analyses, we show that LiCl increases the interactions between the colloidal phase and water molecules, ensuring water holding capability at atmospheric conditions and endowing the hydrogels with freezing tolerance over a wide range of temperatures, from -80 to 25 degrees C. The synergy between CNF and LiCl is critical in maintaining the mechanical strength of the system, which simultaneously displays high stretchability (similar to 748%) and ionic conductivity (2.25 S/m) at low temperatures (-40 degrees C). As a proof of concept, a flexible supercapacitor comprising the proposed electrolyte hydrogel is demonstrated as a reliable, low-temperature electrochemical device. Our results provide the basis for simple and universally applicable systems that fulfill the requirements of flexible electronics under extreme cold conditions.

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One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 5187-23-5, Name is (5-Ethyl-1,3-dioxan-5-yl)methanol, formurla is C7H14O3. In a document, author is Ezzati, Rohollah, introducing its new discovery. Formula: C7H14O3.

Kinetics models of transesterification reaction for biodiesel production: A theoretical analysis

The kinetics of the transesterification reaction has been explored theoretically. A general rate equation (GRE) was obtained for kinetics modeling of transesterification at the entire time of reaction based on a three-step mechanism. It has been shown that the GRE model converts to a Second-Order (SO) model at short initial times of reaction and it converts to Pseudo-First-Order (PFO) model at short initial times of reaction and high concentration of alcohol. Also, a modified form of the Second-Order model (MSO) was derived when the reaction is spontaneous (at Delta(r) G << 0 conditions or at short initial times of reaction). The accuracy of theoretical models and our assumptions was evaluated by three sets of experimental data selected at literature. It has been shown that the accuracy of PFO, SO, and MSO models followed the order of MSO > SO > PFO at short initial times while the GRE model is a suitable kinetics model at the entire times of reaction. Also, our research, contrary to what has been reported so far in published papers, shows that pseudo-first-order and second-order models are only accurate for kinetics modeling of the transesterification reaction at short initial times of reaction. (c) 2020 Elsevier Ltd. All rights reserved.

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Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 3452-97-9, Name is 3,5,5-Trimethylhexan-1-ol, molecular formula is C9H20O. In an article, author is Kulshrestha, Sujay,once mentioned of 3452-97-9, COA of Formula: C9H20O.

Unhealthy alcohol and drug use is associated with an increased length of stay and hospital cost in patients undergoing major upper gastrointestinal and pancreatic oncologic resections

Background: Few studies evaluate the impact of unhealthy alcohol and drug use on the risk and severity postoperative outcomes after upper gastrointestinal and pancreatic oncologic resections. Methods: The National Inpatient Sample was queried to identify patients undergoing total gastrectomy, esophagectomy, total pancreatectomy, and pancreaticoduodenectomy between 2012 and 2015. Unhealthy alcohol and drug use was assessed by the International Classification of Diseases, Ninth Revision, and National Inpatient Sample coder designation. Multivariable regression was used to identify associations between alcohol and drug use and postoperative complication, duration of stay, hospital cost, and mortality. Results: In the study, 59,490 patients met inclusion criteria; 2,060 (3.5%) had unhealthy alcohol use; 1,265 (2.1%) had unhealthy drug use. Postoperative complication rates were higher in patients with alcohol and drug use than in abstainers (67.5% vs 62.8% vs 57.2%; P < .01). On multivariable regression, alcohol use was independently associated with increased risk of a nonwithdrawal complication (odds ratio 1.33 [1.05, 1.68]), and alcohol and drug use were independently associated with increased length of stay (1.54 [0.12, 2.96]) and 2.22 [0.90, 3.55] days) and cost ($5,471 [$60, $10,881] and $4,022 [$402, $7,643]), but not mortality. Conclusion: Unhealthy substance use is associated with increased rates of postoperative complications, prolonged length of stay, and costs in patients undergoing major upper gastrointestinal and pancreatic oncologic resections. Screening and abstinence interventions should be incorporated into the preoperative care pathways for these patients. Published by Elsevier Inc. If you are hungry for even more, make sure to check my other article about 3452-97-9, COA of Formula: C9H20O.

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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. 2807-30-9, Name is 2-Propoxyethanol, molecular formula is , belongs to alcohols-buliding-blocks compound. In a document, author is Li, Houqian, Application In Synthesis of 2-Propoxyethanol.

Conversion of ethanol to 1,3-butadiene over Ag-ZrO2/SiO2 catalysts: The role of surface interfaces

A series of Ag-ZrO2/SiO2 catalysts with different metal-support interfaces were synthesized in an effort to elucidate the roles of specific interfaces in controlling the ethanol to 1,3-butadiene conversion and selectivity. According to the results of detailed characterizations (e.g. CO/pyridine-DRIFTS, XPS, TEM, NH3-TPD, and H-1 MAS NMR), it was found that the Ag-O-Si interfaces significantly enhanced the dehydrogenation of ethanol while the presence of ZrO2 improved the interaction between Ag and ZrO2 /SiO2, creating more Ae active sites. The high dispersion of ZrO2 on SiO2 generated abundant Zr-O-Si interfaces with medium and weak Lewis acidity, promoting the condensation of acetaldehyde to crotonaldehyde. These Zr-O-Si interfaces in close interaction with Ae species played a critical role in the enhanced H transfer during the MPV reduction of crotonaldehyde to crotyl alcohol. The synergies among the interfaces resulted in retarded ethanol dehydration reactivity, balanced ethanol dehydrogenation and condensation reactions, and a subsequent high 1,3-butadiene yield. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.

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 2807-30-9, in my other articles. Application In Synthesis of 2-Propoxyethanol.

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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. 124-76-5, Name is Isoborneol, SMILES is CC1(C)C2(C)CCC1CC2O, in an article , author is Zhang, Xinhui, once mentioned of 124-76-5, Computed Properties of C10H18O.

Preparation and characterization of gellan gum-chitosan polyelectrolyte complex films with the incorporation of thyme essential oil nanoemulsion

Antimicrobial food packaging with a sustained release of antimicrobial agents plays a key role in maintaining food quality and food safety. In this study, polyelectrolyte gellan gum (GG)-chitosan (CS) multilayer film was fabricated by layer-by-layer assembly technology with the incorporation of thyme essential oil (TEO) coarse emulsion (TEOC) or nanoemulsion (TEON). The microstructure of GG-CS three-layered film was observed by scanning electron microscopy (SEM). The red fluorescent signals in confocal laser scanning microscopy (CLSM) images indicated smaller droplets and more uniform distribution of TEON prepared by ultrasonic treatments, which was consistent with the particle size results and porous structure in SEM images. The film incorporated with 6% TEON exhibited higher antimicrobial activity than that with 6% TEOC, and it significantly reduced E. coli populations in liquid model system. Moreover, films incorporated with TEON showed improved mechanical flexibility (elongation at break) and UV blocking property in comparison to TEOC. This developed GGCS three-layered film loading with TEON was expected to be a potential antimicrobial material with sustained release property for food packaging applications.

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Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 115-70-8, Name is 2-Amino-2-ethylpropane-1,3-diol, molecular formula is C5H13NO2, belongs to alcohols-buliding-blocks compound. In a document, author is Yang, Tian, introduce the new discover, Category: alcohols-buliding-blocks.

Selective electrooxidation of 2-propanol on Pt nanoparticles supported on Co3O4: an in-situ study on atomically defined model systems

2-Propanol and its dehydrogenated counterpart acetone can be used as a rechargeable electrofuel. The concept involves selective oxidation of 2-propanol to acetone in a fuel cell coupled with reverse catalytic hydrogenation of acetone to 2-propanol in a closed cycle. We studied electrocatalytic oxidation of 2-propanol on complex model Pt/Co3O4(111) electrocatalysts prepared in ultra-high vacuum and characterized by scanning tunneling microscopy. The electrocatalytic behavior of the model electrocatalysts has been investigated in alkaline media (pH 10, phosphate buffer) by means of electrochemical infrared reflection absorption spectroscopy and ex-situ emersion synchrotron radiation photoelectron spectroscopy as a function of Pt particle size and compared with the electrocatalytic behavior of Pt(111) and pristine Co3O4(111) electrodes under similar conditions. We found that the Co3O4(111) film is inactive towards electrochemical oxidation of 2-propanol under the electrochemical conditions (0.3-1.1 V-RHE). The electrochemical oxidation of 2-propanol readily occurs on Pt(111) yielding acetone at an onset potential of 0.4 V-RHE. The reaction pathway does not involve CO but yields strongly adsorbed acetone species leading to a partial poisoning of the surface sites. On model Pt/Co3O4(111) electrocatalysts, we observed distinct metal support interactions and particle size effects associated with the charge transfer at the metal/oxide interface. We found that ultra-small Pt particles (around 1 nm and below) consist of partially oxidized Pt-delta(+) species which show minor activity towards 2-propanol oxidation. In contrast, conventional Pt particles (particle size of a few nm) are mainly metallic and show high activity toward 2-propanol oxidation.

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 115-70-8. Category: alcohols-buliding-blocks.

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Electric Literature of 112-27-6, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C¨CH bond functionalisation has revolutionised modern synthetic chemistry. 112-27-6, Name is 2,2′-(Ethane-1,2-diylbis(oxy))diethanol, SMILES is OCCOCCOCCO, belongs to alcohols-buliding-blocks compound. In a article, author is Lecaros, Rumwald Leo G., introduce new discover of the category.

Tannin-based thin-film composite membranes integrated with nitrogen-doped graphene quantum dots for butanol dehydration through pervaporation

A thin-film composite membrane was prepared through the interfacial polymerization of tannic acid (TA), a natural oligomer, and acyl chloride monomers – terephthaloyl chloride (TPC) or trimesoyl chloride (TMC). Thin-film nanocomposite (TFN) membranes were also prepared by loading a new class of carbon nanoparticles – nitrogen-doped graphene quantum dots (NGQDs). The composite membranes were characterized with ATR-FTIR, XPS, SEM and water contact angle. The TA-TMC membrane provided lower flux and better water permselectivity than those prepared with TA-TPC due to availability of more reactive acyl chloride. The concentrations of each reactant used, appropriate loading amount of NGQD and contact time between TA and acyl chloride monomers were all determined and investigated to separate 90/10 wt% n-butanol/water mixture at 25 degrees C. The TA-TMC was found to have higher surface hydrophilicity due to more hydroxyl groups present. The incorporation of 50 ppm NGQD during the interfacial polymerization enhanced the pervaporation performance by providing additional hydmphilicity and mass transfer resistance to larger permeating molecule. The TA(0.075)-TMC0.4-NGQD(50) membrane at 3-min contact time had a total flux of 1100 g m(-2) h(-1) and a water concentration in permeate of 97.1 wt% compared to TA(0.075)-TPC0.4-NGQD(50) membrane with 2196 g m(-2) h(-1) and 93.2 wt% in separating 90/10 wt% n-butanol/water mixture at 25 degrees C. The water permselectivity was also found to be more efficient for isobutanol/water mixtures due to the sterically hindered structure of the alcohol. Furthermore, the TA(0.075)-TMC0.4-NGQD(50) membrane was also tested to separate all butanol isomer/water mixtures at 25 degrees C showing better separation performance for sterically hindered or branched butanol isomer. The membrane fabricated herein shows the potential use of cheap and natural oligomer (TA) to produce thin-film composite membranes that provided enough barrier to separate butanol from water through pervaporation.

Electric Literature of 112-27-6, 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 112-27-6 is helpful to your research.

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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. , Category: alcohols-buliding-blocks, 6149-41-3, Name is Methyl 3-hydroxypropanoate, molecular formula is C4H8O3, belongs to alcohols-buliding-blocks compound. In a document, author is Pastori, Daniele, introduce the new discover.

Thromboembolism, mortality, and bleeding in 2,435,541 atrial fibrillation patients with and without cancer: A nationwide cohort study

Background The number of patients with atrial fibrillation (AF) and cancer is rapidly increasing in clinical practice. The impact of cancer on clinical outcomes in this patient population is unclear, as is the performance of the HAS-BLED (Hypertension, Abnormal Renal/Liver Function, Stroke, Bleeding History or Predisposition, Labile INR, Elderly, Drugs/Alcohol) and CHA(2)DS(2)-VASc (Congestive Heart Failure, Hypertension, Age >= 75 years, Diabetes Mellitus, Stroke or Transient Ischemic Attack, Vascular Disease, Age 65 to 74 Years, Sex Category) scores. Methods This was an observational, retrospective cohort study including 2,435,541 adults hospitalized with AF. The authors investigated the incidence rates (IRs) of all-cause and cardiovascular mortality, ischemic stroke, major bleeding, and intracranial hemorrhage (ICH) according to the presence of cancer and cancer types. Results Overall, 399,344 (16.4%) had cancer, with the most common cancers being metastatic, prostatic, colorectal, lung, breast, and bladder. During a mean follow-up of 2.0 years, cancer increased all-cause mortality (hazard ratio [HR], 2.00; 95% confidence interval [CI], 1.99-2.01). The IR of ischemic stroke was higher with pancreatic cancer (2.8%/y), uterine cancer (2.6%/y), and breast cancer (2.6%/y), whereas it was lower with liver/lung cancer (1.9%/y) and leukemia/myeloma (2.0%/y), in comparison with noncancer patients (2.4%/y). Cancer increased the risk of major bleeding (HR, 1.27; 95% CI, 1.26-1.28) and ICH (HR, 1.07; 95% CI, 1.05-1.10). Leukemia, liver cancer, myeloma, and metastatic cancers showed the highest IRs for major bleeding/ICH. Major bleeding and ICH rates progressively increased with the HAS-BLED score, which showed generally good predictivity with C indexes > 0.70 for all cancer types. The CHA(2)DS(2)-VASc score’s predictivity was slightly lower in AF patients with cancer. Conclusions Cancer increased all-cause mortality, major bleeding, and ICH risk in AF patients. The association between cancer and ischemic stroke differed among cancer types, and in some types, the risk of bleeding seemed to exceed the thromboembolic risk.

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 6149-41-3. Category: alcohols-buliding-blocks.

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