Article
Chemistry, Multidisciplinary
J. Lazare, C. Tebes-Stevens, E. J. Weber
Summary: In this study, a robust QSAR model was developed using an intuitive multiple linear regression approach to predict the base-catalyzed rate constants of carboxylic acid esters and lactones. The model included parameters such as pK(a), electronegativity, charge density, and steric parameters. The model demonstrated high accuracy in both internal and external validation.
SAR AND QSAR IN ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Zihao Wang, Yizhuo Lu, Jinxiang Yang, Wei Xiao, Tianyou Chen, Changfeng Yi, Zushun Xu
Summary: Hydrophobic environments significantly influence the catalytic performance of artificial catalytic triads, but are often overlooked. A simple strategy to engineer the hydrophobic environment in polystyrene-supported artificial catalytic triad nanoparticles was developed. The influence of chemical structures and constituent ratios of hydrophobic copolymers on catalytic performance was studied, demonstrating potential applications for the hydrolysis of carboxylic esters.
Article
Agricultural Engineering
Suan Shi, Wenjian Guan, David Blersch, Jing Li
Summary: Utilizing cheap additives to enhance enzymatic hydrolysis efficiency and reduce enzyme dosage is an effective way to decrease the cost of lignocellulose conversion. The addition of polyDADMAC in alkaline pretreatment improves enzymatic hydrolysis, increasing glucan and xylan digestibility in different lignocellulose materials. PolyDADMAC disrupts cellulose fibers, facilitating enzyme accessibility, and leads to changes in surface properties of the treated samples.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Environmental Sciences
Malgorzata Dabrowska, Agata Sommer, Izabela Sinkiewicz, Antoni Taraszkiewicz, Hanna Staroszczyk
Summary: This study focused on the alkaline hydrolysis of keratin from chicken feathers, finding that the volume ratio of 1M NaOH to the feathers' mass had a significant effect on process yield, while input variables did not significantly affect the molecular weight of peptides obtained. Statistical analysis reduced the number of trials, improving experimental efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Ning Yang, Shucheng Yang, Xing Zheng
Summary: This study demonstrates that the addition of sulfites can inhibit the production of melanoidin during alkaline thermal hydrolysis of sludge, while increasing the concentration of protein and enhancing protein recovery.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Polymer Science
Tim B. Mrohs, Oliver Weichold
Summary: The aim of this study was to evaluate the persistence of alkaline hydrogels based on different crosslinkers. The results show that the tetraallyl crosslinkers have good solubility in water and remain relatively stable under accelerated ageing conditions.
Article
Materials Science, Paper & Wood
J. Tetreault, D. Vedoy, P. Begin, S. Paris Lacombe, A. -l. Dupont
Summary: This research estimated the rate of degradation of paper and developed a kinetic degradation model. The study found that the activation energy and pH had significant influences on the decay of paper, with alkaline papers and acidic papers with good printing quality being more durable.
Article
Chemistry, Multidisciplinary
Marco Antonio G. B. Gomes, Christiane Fernandes, Lawrence R. Gahan, Gerhard Schenk, Adolfo Horn
Summary: Organophosphates are important organic compounds essential for living organisms and widely used in industrial applications, but their natural degradation can pose problems in waste handling and storage. Research on heterogeneous catalysts for the hydrolysis of organophosphates has not been as prominent as that on homogeneous catalysts in recent years, highlighting the importance of developing heterogeneous catalysts for this purpose.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Acoustics
Kait Kaarel Puss, Mart Loog, Siim Salmar
Summary: This study evaluates the effect of ultrasound on the dissolution of hydrolysis lignin (HL) in aqueous NaOH solutions and the acid precipitation yield of HL. The results show that the solubility of HL is strongly dependent on NaOH concentration, but ultrasound treatment significantly improves the solubility and reaches a plateau at a specific NaOH/HL ratio.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Engineering, Environmental
Chengyi Sun, Yaling Wang, Bao Jiang, Shanshan Hu, Yiqi Wang, Chong Zhang, Fei Liu, Yan Zhang, Guoao Li
Summary: We studied the degradation of amoxicillin under oxygen-contained and oxygen-free conditions. Oxygen and OH- radicals played important roles in the degradation under oxygen-contained condition, while the phenol group participated in the reaction with oxygen radicals. 30 degradation products were identified. The degradation pathways were similar to those of photodegradation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Clemens Muller, Carina A. Heck, Luca Stephan, Mandy Paschetag, Stephan Scholl
Summary: Back-to-monomer recycling provides a solution for the unrecyclable PET waste, such as textile fibers, multilayer food trays, and brittle bottles. This study focuses on the depolymerization of PET through alkaline hydrolysis and subsequent precipitation of terephthalic acid (TA) using different temperatures and acidification agents. The results show that using diluted acetic acid and increasing the precipitation temperature can lead to larger TA crystals and shorter filtration times.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Applied
Gabriel Banvillet, Gael Depres, Naceur Belgacem, Julien Bras
Summary: Efficient production of cellulose nanofibrils from eucalyptus fibers was achieved using a combination of NaOH and enzymatic treatments followed by pilot scale grinding. The treatment resulted in CNF with a rigid structure, increased crystallinity indices, and reduced DP values, with a multi-scale analysis of properties and energy consumption. Mechanical properties of nanopapers decreased but optical properties improved, showing potential for industrial applications with reduced energy needs.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Organic
Yang Wang, Biao Ma, Yingning Mao, Zhihui Wang, Jinsong Peng, Chunxia Chen, Zhanyu Li
Summary: This research reports the anti-Markovnikov hydroalkoxylation reaction for the synthesis of Z-enol ethers and provides a mechanistic explanation for their high Z-selectivity. Z-enol ethers can serve as important intermediates for late-stage transformations and gram-scale synthesis.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Agricultural Engineering
Shao-Fei Sun, Hai-Yan Yang, Jing Yang, Zheng-Jun Shi
Summary: This study investigates the inhibitory effect of hemicellulosic structure and content on the enzymatic hydrolysis of cellulose from cocksfoot grass. The results show that alkaline treatments can improve the efficiency of cellulose hydrolysis.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Energy & Fuels
William Rogoski, Gabriela Nayana Pereira, Karina Cesca, Moises Amancio da Silva, Eduardo Zanella, Boris U. Stambuk, Patricia F. Avila, Rosana Goldbeck, Debora de Oliveira, Cristiano Jose de Andrade
Summary: This study successfully extracted xylooligosaccharides (XOS) with prebiotic properties from cassava peel using a combination of pretreatment and enzymatic hydrolysis. The research demonstrates the technical feasibility of fractionating hemicellulose from cassava peel to obtain XOS, highlighting its potential as a valuable bioactive compound.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Organic
E. A. Martynenko, I. L. Glazko, S. V. Levanova, Yu. V. Portnova
PETROLEUM CHEMISTRY
(2015)
Article
Chemistry, Applied
I. L. Glazko, S. V. Levanova, E. A. Martynenko, A. A. Sokolova
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
(2011)
Article
Chemistry, Applied
E. A. Martynenko, I. L. Glazko, S. V. Levanova, Yu. V. Portnova
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
(2014)
Article
Chemistry, Organic
E. A. Martynenko, S. Levanova, I. L. Glazko, A. A. Morgun
PETROLEUM CHEMISTRY
(2018)
Article
Chemistry, Applied
M. M. Chernova, P. P. Minayev, Ye. A. Martynenko, Al. A. Pimerzin, Yu. V. Yeremina, S. P. Verevkin, A. A. Pimerzin
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
(2018)
Article
Chemistry, Applied
E. A. Martynenko, Al. A. Pimerzin, A. A. Savinov, S. P. Verevkin, A. A. Pimerzin
TOPICS IN CATALYSIS
(2020)
Article
Chemistry, Physical
Evgeniya A. Martynenko, Sergei V. Vostrikov, Aleksey A. Pimerzin
Summary: The study found that platinum catalysts supported on mesoporous silica MCM-48 and SBA-15 showed significantly higher catalytic activity during decalin dehydrogenation compared to catalysts supported on amorphous SiO2. Kinetic control is required for efficient decalin dehydrogenation.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2021)
Article
Chemistry, Physical
R. Shafigulin, E. O. Tokranova, A. Bulanova, P. Kazakevich, S. V. Vostrikov, E. A. Martynenko, Hong Zhu
Summary: This study investigated the properties and catalytic activity of catalysts for the electrochemical reduction of oxygen synthesized using Vulcan XC-72 carbon black, modified with silver and palladium using the borohydride method. The synergistic effect of palladium and silver on the catalyst activity, especially the enhancement of efficiency in the oxygen reduction process, was observed.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2021)
Article
Chemistry, Physical
Sergey P. Verevkin, Kseniya Zherikova, Evgeniya A. Martynenko
Summary: Ionic liquids based on pyridinium and quinolinium cations show promising results in fuel desulfurization. The vaporization thermodynamics of these liquids are of practical importance, and their standard molar enthalpies of vaporization were derived using experimental data and structure-property correlations. A group-additivity method was developed based on the evaluated thermodynamic data to predict vaporization enthalpies of molecular and ionic compounds.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Andzhela Vladimirovna Bulanova, Roman Vladimirovich Shafigulin, Kirill Yurievich Vinogradov, Elena Olegovna Tokranova, Evgenia Andreevna Martynenko, Sergey Vladimirovich Vostrikov, Vladimir Vladimirovich Podlipnov
Summary: Bimetallic catalysts based on carbon nanotubes, graphene oxide, and ultradispersed diamonds were synthesized and characterized for the electroreduction of oxygen process. The carbon nanotube-based catalysts exhibited higher activity compared to other carbon materials. Specifically, the bimetallic catalysts based on cobalt phthalocyanine and palladium showed enhanced activity on all carbon supports.
Article
Energy & Fuels
Kirill Yurievich Vinogradov, Roman Vladimirovich Shafigulin, Elena Olegovna Tokranova, Sergey Vladimirovich Vostrikov, Evgeniya Andreevna Martynenko, Vladimir Vladimirovich Podlipnov, Pavel Vladimirovich Kazakevich, Artem Anatolevich Sheldaisov-Meshcheryakov, Nikolai Aleksandrovich Vinogradov, Andzhela Vladimirovna Bulanova
Summary: The main obstacle to the widespread dissemination of fuel cells is the high cost, so researchers are actively searching for ways to replace the expensive platinum catalyst with cheaper analogs. In this paper, Ag- and Pd-containing carbon catalysts based on carbon nanotubes and graphene oxide were studied. The results showed that the catalyst with 10% silver content and based on MWCNT has the greatest specific surface area, and all the synthesized catalysts are mainly mesoporous. Raman spectroscopy and SEM data indicate a significant change in the structure of the modified carriers compared to pure MWCNT and GO. Electrochemical experiments showed that GO_Ag 10% and MWCNT_Ag 10% Pd 10% have kinetic parameters closest to those of the platinum catalyst, with GO_Ag 10% having the highest initial potential E-onset = -0.145 V and MWCNT_Ag 10% Pd 10% having the highest half-wave potential E1/2 = -0.23 V. The studied catalysts have comparable characteristics to those presented in the literature.
Article
Chemistry, Applied
E. A. Martynenko, S. V. Vostrikov, A. Bulanova, R. Shafigulin, A. A. Pimerzin
Summary: The research results indicate that the morphology of carbon support pores plays a significant role in the electrocatalytic activity of Pt particles, and the correct choice of carbon support can reduce the metal content of the catalyst, leading to cost savings.
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
(2021)
