Author: tianli

Shen, Changcheng published the artcileValorization of lignin in native corn stover via fractionation-hydrogenolysis process over cobalt-supported catalyst without external hydrogen, Related Products of alcohols-buliding-blocks, the publication is Molecular Catalysis (2021), 111832, database is CAplus.

Lignin, which represents the most abundant renewable aromatic biomass resource on the earth, is promising as an alternative for the production of chems. We presented a modified method that provides the hydrogen source in the reaction with a mixed solvent of alc., acid and water, replacing the original method that directly provides a hydrogen source with external hydrogen. In addition, a new cobalt supported on nitrogen doped carbon catalyst preparation method (one-pot) was presented. We proposed one-step method in which corn stover lignin is converted to target monomers over Co/AC-N_one-pot catalyst and mixed solvent. The role of the alc. to acid and water mixed solvent not only extract lignin fragments from the matrix but also provide the hydrogen source. Cobalt which has electronic interaction with the nitrogen reformed alcs. to obtain hydrogen and stabilized lignin intermediates during the reaction by hydrogenation of active bonds. Different kinds of nitrogen including pyridinic and pyrrolic nitrogen functional groups plays a critical role in stabilizing Co. Nearly complete delignification (91%) and high yield of target monomers (23.8%) can be obtained under the conditions (5wt% Co/Ac-N_one-pot, 10:1:1mixt. solvent consist of isopropanol/water/ formic acid, 235°C, 200 min, 0.1 MPa N₂), and the selectivity of target monomers was 85%. Circulation experiment of catalyst was performed directly without any operation of the residue, and it could maintain 90% activity in the first four cycles.

Molecular Catalysis published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C15H20O6, Related Products of alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Kalinoski, Ryan M. published the artcileAntimicrobial Properties of Corn Stover Lignin Fractions Derived from Catalytic Transfer Hydrogenolysis in Supercritical Ethanol with a Ru/C Catalyst, HPLC of Formula: 645-56-7, the publication is ACS Sustainable Chemistry & Engineering (2020), 8(50), 18455-18467, database is CAplus.

Converting lignin to value added products at high yields provides an avenue for making ethanol biorefineries more profitable while reducing the carbon footprint of products generally derived from petroleum. In this study, corn stover lignin was depolymerized by catalytic transfer hydrogenolysis (CTH) in supercritical ethanol with a Ru/C catalyst. The lignin derived bio-oil was then sequentially extracted utilizing hexane, petroleum ether, chloroform and Et acetate as solvents in order of less polar to polar and the subsequent bio-oils were characterized using GPC, GC/MS and HSQC NMR. Results show lignin derived compounds were sequentially extracted into groups depending on the solvent polarity. Antimicrobial properties of the bio-oils were screened against Gram-pos. (Bacillus subtilis, Lactobacillus amylovorus, and Staphylococcus epidermidis), Gram-neg. (Escherichia coli) bacteria and yeast (Saccharomyces cerevisiae) by examining microbial growth inhibition. Results show that CTH derived bio-oils inhibited all tested organisms at concentrations less than 3 mg/mL. Total monomer concentration and the presence of specific monomers (i.e., syringyl propane) showed correlations to antimicrobial activity, likely due to cell death or membrane damage. This study provides insights into using sequential extraction to fractionate lignin-derived compounds and correlations between the properties of the extracted compounds and their antimicrobial activity. A lignin-based bio-oil was prepared from catalytic transfer hydrogenolysis of purified corn stover lignin with ethanol and a ruthenium on carbon catalyst. Polar and nonpolar solvents were used to sequentially extract different compounds The raw bio-oil and sequential extraction fractions exhibited antimicrobial properties against Gram-pos./neg. bacteria and yeast, with activity related to total monomer content and specific monomers.

ACS Sustainable Chemistry & Engineering published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, HPLC of Formula: 645-56-7.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Xu, Zhiqiang published the artcileHydration of Portland cement with alkanolamines by thermal analysis, Product Details of C9H21NO3, the publication is Journal of Thermal Analysis and Calorimetry (2018), 131(1), 37-47, database is CAplus.

Four types of alkanolamines (i.e., traditional alkanolamines represented by TEA and TIPA and new alkanolamines represented by DEIPA and EDIPA) were added to Portland cement as chem. additives, and their effects on the cement properties and hydration process were investigated. An isothermal calorimeter was used to track the hydration heat flow of the cement pastes with or without alkanolamines. Thermogravimetric analyses were performed to measure the degree of hydration over the course of 28 days. In addition, X-ray diffraction, MIP anal. and SEM were used as auxiliary tests. The results indicated that alkanolamines improved the compressive strength of the cement mortars. It was found that TEA increased the rate of the second hydration of C₃A, and TIPA accelerated the hydration of C₄AF. DEIPA and EDIPA promoted the hydration of both the aluminum and ferrite phases as well as catalyzed the conversion of AFt to the AFm phase. By contrast, the new alkanolamines represented by DEIPA and EDIPA expressed more superior properties.

Journal of Thermal Analysis and Calorimetry published new progress about 122-20-3. 122-20-3 belongs to alcohols-buliding-blocks, auxiliary class Organic Pigment, name is Triisopropanolamine, and the molecular formula is C9H21NO3, Product Details of C9H21NO3.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Xu, Zhiqiang published the artcileResearch on cement hydration and hardening with different alkanolamines, Product Details of C9H21NO3, the publication is Construction and Building Materials (2017), 296-306, database is CAplus.

In this work, six types of alkanolamines (i.e., TEA, TIPA, DEIPA, EDIPA, THEED and THPED) were added into Portland cement as chem. additives, and their effects on phys. properties and hydration of Portland cement as well as mechanism were investigated. The results show that all the alkanolamines expect TEA can effectively improve the degree of cement hydration. TEA delays the hydration of alite because the formation of the TEA-Ca2+ complex inhibits the growth of CH. TIPA accelerates the hydration of C4AF at late stage, but reduce the early strength due to its air-entraining effect. The lower dosages of DEIPA and EDIPA have the advantages of TEA and TIPA, which increase not only the early strength but also the late strength. They promote both the hydration of the aluminum and ferrite phase as well as catalyze the conversion of AFt to AFm, which lead to the optimization of pore size distribution. The effects of THEED and THPED on hydration of Portland cement are similar though their mol. structure are different which improve the late strength and have larger suitable dosage range.

Construction and Building Materials published new progress about 122-20-3. 122-20-3 belongs to alcohols-buliding-blocks, auxiliary class Organic Pigment, name is Triisopropanolamine, and the molecular formula is C10H23N, Product Details of C9H21NO3.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Wang, Dungai published the artcileLiBr-Catalyzed C3-Disulfuration between Indole and N-Dithiophthalimide, Recommanded Product: 2-Phenylethanethiol, the publication is Journal of Organic Chemistry, database is CAplus and MEDLINE.

A simple, green halide-catalyzed protocol for disulfuration of indole derivatives with N-dithiophthalimides was developed. This C-H disulfide reaction proceeded smoothly at room temperature with economical LiBr as catalyst, providing an effective method for the synthesis of novel unsym. disulfides. A series of 3-dithioindole derivatives were obtained in high yields with good functional group tolerance, moreover, the wide scope of Harpp reagents (aryl, benzyl, primary, secondary, tertiary) confirmed the practicability of this approach.

Journal of Organic Chemistry published new progress about 4410-99-5. 4410-99-5 belongs to alcohols-buliding-blocks, auxiliary class Thiol,Benzene, name is 2-Phenylethanethiol, and the molecular formula is C2H2N4O2, Recommanded Product: 2-Phenylethanethiol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Zhao, Mu published the artcileCharacterization of key aroma-active compounds in Hanyuan Zanthoxylum bungeanum by GC-O-MS and switchable GC x GC-O-MS, Formula: C10H18O, the publication is Food Chemistry (2022), 132659, database is CAplus and MEDLINE.

The present study sought to characterize the composition of volatile aroma compounds and key aroma-active compounds of dried Hanyuan Zanthoxylum bungeanum. The volatile aroma compounds were analyzed by the solid-phase microextraction (SPME) combined with gas chromatog.-olfactometry-mass spectrometry (GC-O-MS) and two-dimensional comprehensive gas chromatog.-olfactometry-mass spectrometry (GC x GC-O-MS). The key aroma-active compounds were analyzed by the aroma extract dilution anal. and odor activity value. A total of 72 volatile compounds were identified by GC-O-MS, of which 28 were aroma-active. Meanwhile, 116 volatile compounds were identified by GC x GC-O-MS, of which 43 were aroma-active. These results revealed that myrcene, (+)-limonene, (E)-β-ocimene, β-cubebene, Germacrene D, cineole, linalool, and linalyl acetate were the key aroma-active compounds of dried Hanyuan Zanthoxylum bungeanum.

Food Chemistry published new progress about 106-25-2. 106-25-2 belongs to alcohols-buliding-blocks, auxiliary class Natural product, name is cis-3,7-Dimethyl-2,6-Octadien-1-Ol, and the molecular formula is C17H29BO2, Formula: C10H18O.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Lu, Jian-ping published the artcileClinical effect of hemabate in prevention and treatment of postpartum hemorrhage and adverse events among high risk pregnant women receiving cesarean section, Category: alcohols-buliding-blocks, the publication is Zhongguo Fuyou Baojian (2016), 31(18), 3717-3719, database is CAplus.

Objective To explore the clin. effect of hemabate in prevention and treatment of postpartum hemorrhage and adverse events among high risk pregnant women receiving cesarean section, accumulate experience for clin. optimization strategy among the population. Methods From June 2010 to Oct. 2013, 78 pregnant women underwent cesarean section in Department of Obstetrics and Gynecol. in the hospital were selected, then they were divided into study group and control group according to random number table, 39 cases in each group. The cases in control group were treated by oxytocin combined with carboprost methylate suppositories, while the cases in study group were treated by hemabate. The amounts of blood loss and urine volumes during operation and at 2 and 24 h after operation in the two groups were recorded, the incidence rates of adverse events in the two groups were compared. Results The amount of blood loss during operation and at 2 and 24 h after operation in study group were statistically significantly lower than those in control group (P<0.05). Urine volumes during operation and at 2 and 24 h after operation in study group were statistically significantly higher than those in control group (P<0.05). The incidence rate of adverse reactions in study group was statistically significantly lower than that in control group (P<0.05). Conclusion For the high-risk pregnant women receiving cesarean section, the clin. efficacy and safety of hemabate in prevention and treatment of postpartum hemorrhage are better than those of oxytocin combined with carboprost methylate suppositories, which is worthy of further promotion and application in clin. practice.

Zhongguo Fuyou Baojian published new progress about 58551-69-2. 58551-69-2 belongs to alcohols-buliding-blocks, auxiliary class Chiral,Alkenyl,Amine,Aliphatic cyclic hydrocarbon,Ester,Alcohol,Inhibitor,, name is 2-Amino-2-(hydroxymethyl)propane-1,3-diol (Z)-7-((1R,2R,3R,5S)-3,5-dihydroxy-2-((S,E)-3-hydroxy-3-methyloct-1-en-1-yl)cyclopentyl)hept-5-enoic acid, and the molecular formula is C25H47NO8, Category: alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Sun, Jie published the artcileA dual probe for selective sensing of Zn (II) by fluorescent and Cu (II) by colorimetric methods in different systems based on 7,8-benzochromone-3-carbaldehyde -(fluorescein)hydrazone, Synthetic Route of 86-48-6, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (2021), 113007, database is CAplus.

In this study, a novel fluorescent probe sensor, 7,8-benzochromone-3-carbaldehyde (fluorescein)hydrazone L, was designed and synthesized. Based on the photoinduced electron transfer (PET) process, L can detect Zn²⁺ in the solution of EtOH/H₂O (9/1, V/V). The probe had high selectivity and sensitivity to Zn²⁺ with a lower detection limit of 3.4 x 10^-7 M. Furthermore, the coordination ratio of L-Zn²⁺ was 1:1, which could be corroborated by Job′s plot. In addition, in the EtOH/ H₂O (5/2, V/V) solution of the probe L, Cu²⁺ was added to produce a marked change in color from achromatous to yellow, indicating that the probe L could detect Cu²⁺ by colorimetry, which was detectable by the naked eye, simply and quickly. According to the Benesi-Hildebrand equation, the complexing constants values of L-Zn²⁺ and L-Cu²⁺ were 9.8 x 104 M²⁺ and 1.009 x 105 M²⁺, resp.

Journal of Photochemistry and Photobiology, A: Chemistry published new progress about 86-48-6. 86-48-6 belongs to alcohols-buliding-blocks, auxiliary class Organic Pigment,Natural product, name is 1-Hydroxy-2-naphthoic acid, and the molecular formula is C6H5F4NO3S, Synthetic Route of 86-48-6.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Li, Yingwei published the artcileHydrogen Evolution Electrocatalyst Design: Turning Inert Gold into Active Catalyst by Atomically Precise Nanochemistry, Name: 2-Phenylethanethiol, the publication is Journal of the American Chemical Society (2021), 143(29), 11102-11108, database is CAplus and MEDLINE.

Electrocatalytic hydrogen evolution reaction (HER) holds promise in the renewable clean energy scheme. Crystalline Au and Ag are, however, poor in catalyzing HER, and the ligands on colloidal nanoparticles are generally another disadvantage. Herein, we report a thiolate (SR)-protected Au₃₆Ag₂(SR)₁₈ nanocluster with low coverage of ligands and a core composed of three icosahedral (I_h) units for catalyzing HER efficiently. This trimeric structure, together with the monomeric I_h Au₂₅(SR)₁₈^– and dimeric I_h Au₃₈(SR)₂₄, constitutes a unique series, providing an opportunity for revealing the correlation between the catalytic properties and the catalyst′s structure. The Au₃₆Ag₂(SR)₁₈ surprisingly exhibits high catalytic activity at lower overpotentials for HER due to its low ligand-to-metal ratio, low-coordinated Au atoms and unfilled superat. orbitals. The c.d. of Au₃₆Ag₂(SR)₁₈ at -0.3 V vs RHE is 3.8 and 5.1 times that of Au₂₅(SR)₁₈^– and Au₃₈(SR)₂₄, resp. D. functional theory (DFT) calculations reveal lower hydrogen binding energy and higher electron affinity of Au₃₆Ag₂(SR)₁₈ for an energetically feasible HER pathway. Our findings provide a new strategy for constructing highly active catalysts from inert metals by pursuing atomically precise nanoclusters and controlling their geometrical and electronic structures.

Journal of the American Chemical Society published new progress about 4410-99-5. 4410-99-5 belongs to alcohols-buliding-blocks, auxiliary class Thiol,Benzene, name is 2-Phenylethanethiol, and the molecular formula is C8H10S, Name: 2-Phenylethanethiol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Zhao, Shuzhen published the artcileEvaluation of hybrid pressure-driven and osmotically-driven membrane process for non-thermal production of apple juice concentrate, Quality Control of 106-25-2, the publication is Innovative Food Science & Emerging Technologies (2022), 102895, database is CAplus.

This study investigates the potential of hybrid membrane processes including microfiltration (MF), ultrafiltration (UF) and forward osmosis (FO) for non-thermal concentration of apple juice. The process performance and characteristics (physicochem. properties, nutritional and aroma components and microbiol. quality) of apple juice were studied. The clarity of apple juice was significantly promoted as pore size of membrane reduced. MF and UF can also ensure microbiol. safety in pre-treated apple juice. According to its efficiency of filtration as well as performance of simultaneous clarification and cold-sterilization, 0.22μm MF membrane was identified as the optimal membrane for the pre-treatment. The pre-treated apple juice can be concentrated up to 65°Brix by subsequent single stage FO. FO retained nutritional and volatile compounds of apple juice while significant reductions were found in the juice concentrated by vacuum evaporation Hybrid MF-FO can be a promising non-thermal technol. to produce apple juice concentrate with high quality.

Innovative Food Science & Emerging Technologies published new progress about 106-25-2. 106-25-2 belongs to alcohols-buliding-blocks, auxiliary class Natural product, name is cis-3,7-Dimethyl-2,6-Octadien-1-Ol, and the molecular formula is C13H10O3, Quality Control of 106-25-2.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts