Article
Polymer Science
Hemanta Chutia, Charu Lata Mahanta
Summary: This study investigates the improvement of thermodynamics and thermal decomposition kinetics properties of native starch (NS) by converting it into nanoparticles (StNP) through different treatments. The results show that the treated StNPs have higher melting temperature and hydroxyl content, which could overcome the unsuitability of NS in the food industry.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Food Science & Technology
Patricia Martinez, Darcy Vilcarromero, Diego Pozo, Fiorela Pena, Jose Manuel Cervantes-Uc, Jorge Uribe-Calderon, Carmen Velezmoro
Summary: This study evaluated the starch characteristics of ten native potato varieties grown in Cusco, revealing subtle differences in protein content, amylose content, phosphorus content, morphology, structure, thermal properties, and viscosity among the starches. These variations make the starches suitable for different applications in the food industry.
JOURNAL OF FOOD SCIENCE
(2021)
Article
Chemistry, Applied
Rui Wang, Mei Li, Jinguang Liu, Fenfen Wang, Jing Wang, Zhongkai Zhou
Summary: This study investigated the effects of dual modifications of pullulanase debranching and propionylation on rice starch properties, confirming the occurrence of propionylation in starch molecules. The results revealed that AC is an important factor affecting propionylation reaction, and debranching treatment increased the degree of substitution of propionyl starch. Additionally, debranching led to increased crystallinity levels and changes in crystallinity patterns, which are associated with hydrolysis resistance.
FOOD HYDROCOLLOIDS
(2021)
Review
Food Science & Technology
Yashaswini Premjit, N. U. Sruthi, R. Pandiselvam, Anjineyulu Kothakota
Summary: This study provides an overview of the latest scientific literature on aqueous ozone, including its properties, generation, factors affecting efficiency, and its impact on food decontamination, starch modification, pesticide degradation, and seed germination. Aqueous ozone is believed to have the potential to modify the food matrix, with outcomes dependent on processing conditions.
COMPREHENSIVE REVIEWS IN FOOD SCIENCE AND FOOD SAFETY
(2022)
Article
Engineering, Environmental
Shuhui Zhang, Liwei Wang, Yan Zhang, Fan Cao, Qie Sun, Xiaohan Ren, Ronald Wennersten
Summary: The study explores the influence mechanism of hydroxyl groups on the adsorption of SO2 by activated carbon through experiments and simulations. The results show that hydroxyl functional groups promote the physical adsorption of SO2 on activated carbon by increasing its polarity. The hydroxyl groups also enhance the physisorption of SO2 and H2O through dipole-dipole interactions and hydrogen bonding. The coexistence of SO2, H2O, and O2 on activated carbon promotes their mutual physisorption through non-covalent interactions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Applied
Georgi N. Vayssilov, Hristiyan A. Aleksandrov, Eddy Dib, Izabel Medeiros Costa, Nikolai Nesterenko, Svetlana Mintova
Summary: This research investigated the acidity of Bronsted acid sites (BAS) and silanols in zeolite nanoparticles. It was found that the acidity of hydroxyls in zeolites is significantly higher than in the gas phase. However, the acidity of hydroxyls cannot be estimated based on the spectral characteristics.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Agricultural Engineering
M. Rubens, M. Van Wesemael, E. Feghali, L. Luntadila Lufungula, F. Blockhuys, K. Vanbroekhoven, W. Eevers, R. Vendamme
Summary: Lignin, the second most abundant natural polymer, has been studied extensively as a source of polyol for lignin-based polyurethanes (PUs). The reactivity differences between aliphatic and aromatic hydroxyl groups with isocyanates were investigated using lignin model compounds and lignin hydrogenolysis oil. The results showed that aliphatic hydroxyl groups react faster with aromatic isocyanates, while aromatic hydroxyl groups react slower. The activation energies ranged from 39.5-55.2 kJ.mol(-1) and the reaction rate constants ranged from 5.19.10(-3) M1-n s(-1) to 1.0(4).10(-3) M1-n s(-1).
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Multidisciplinary
Boyang Zhang, Rui Li, Qing Peng
Summary: This study investigates the rotating and braking processes of a carbon nanotube (CNT)-based rotor system using molecular dynamics simulation. It is found that the speed of response can be tuned by controlling the ratio of hydroxyl groups on the edges. The formation of strong hydrogen bonds between interfaces increases the interface interaction and enhances the speed of response. The vibration of hydroxyl groups plays a key role in energy dissipation.
Article
Chemistry, Multidisciplinary
Takeshi Matsukawa, Kazuki Iida, Mitsutaka Nakamura, Toru Ishigaki
Summary: Neutron powder diffraction analysis showed that ceria transforms into the oxyhydroxide structure through hydrogen treatment, with the presence of the CeH functional group possibly in an aperiodic structure based on inelastic neutron scattering measurements.
Article
Chemistry, Multidisciplinary
Prachi Bhatia, Krishna Pandey, Priyanka Das, Dheeraj Kumar
Summary: By introducing a hydroxyl functionality and fine-tuning the properties, the physical and thermal stabilities, as well as energetic performance of high-performing 3,5-dinitro-functionalised bispyrazolymethanes, have been improved.
CHEMICAL COMMUNICATIONS
(2023)
Article
Polymer Science
Yuanyuan Li, Tao Li, Wei Li, Yahui Lou, Liyuan Liu, Zhe Ma
Summary: The study demonstrates that hydroxyl functionalization can influence the crystallization and phase transition behaviors of polybutene-1, providing a potential molecular design approach for developing materials with specific structures and stable phases. Stepwise annealing and low-temperature nucleation are effective strategies to enhance the II-I phase transition, with the optimal nucleation temperature independent of the hydroxyl content. Additionally, reducing the crystallization temperature can further accelerate the II-I transition kinetics by increasing the effect of hydroxyl groups on the process.
Article
Polymer Science
Shanta Pokhrel, Amrita Sigdel, Ralf Lach, Miroslav Slouf, Jakub Sirc, Vimal Katiyar, Dhruba Raj Bhattarai, Rameshwar Adhikari
Summary: Starch was extracted from potatoes cultivated in Nepal and characterized using FTIR, with its properties evaluated based on ash content, moisture content, and amylose content. Blends of PBAT/TPS with varying concentrations were prepared, showing esterification reactions between PBAT, TPS and citric acid via FTIR. The addition of starch led to improvements in mechanical properties of PBAT, while reducing the thermal stability of the blend.
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
(2021)
Article
Chemistry, Physical
Liang Zhou, Juying Lei, Fuchen Wang, Lingzhi Wang, Michael R. Hoffmann, Yongdi Liu, Su-Il In, Jinlong Zhang
Summary: A novel alkalinization process was used to successfully synthesize g-C3N4 (CN) nanotubes functionalized with surface > OH groups, which provide a large surface area and improved mass transfer properties for efficient H2O2 production. The in situ grafted > OH groups capture photogenerated holes, promoting charge separation and enabling the production of H2O2 without sacrificial agents. This work presents a new strategy for spontaneous H2O2 production using a metal-free CN photocatalyst.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Xiao Xu, Haotian Liu, Jian Wang, Ting Chen, Xing Ding, Hao Chen
Summary: The surface hydroxyl groups (SHGs) on the interface of nanomaterials play a crucial role in environmental purification technologies, influencing reaction kinetics, energetics, and mechanisms, and are important in the removal of harmful substances. Further research on SHGs' chemical behavior can help innovate environmental catalysis theories and design catalysts with better performance.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
Songlin Deng, Shanshan Jia, Xunhe Deng, Yan Qing, Sha Luo, Yiqiang Wu
Summary: The presence of hydroxyl groups, both from nanoparticles and substrates, has significant influence on tuning surface morphology and wettability. Nanoparticles abundant in hydroxyl groups promote the formation of island-like structure, while hydroxyl groups in substrates restrict this formation. This study sheds light on the transformation of island-like structure driven by hydroxyl groups and offers a new strategy to optimize the design of high-performance superhydrophobic surfaces.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Pawel Daszkiewicz, Beata Kurc, Marita Piglowska, Maciej Andrzejewski
Summary: This study showcases the use of natural polysaccharides like starch and cellulose as carbon sources for fuel cells. It introduces two innovative methods for obtaining hydrogen: by adsorption and through enzymes. The carbonization process of the material allows for excellent gas sorption properties and high efficiency, with the enzymatic method offering greater control over the properties of the obtained material.
Article
Chemistry, Physical
Beata Kurc, Marita Piglowska
Summary: The research aims to evaluate the diffusion coefficient and ionic conductivity of carbon-based anode materials under different temperature conditions, as well as to determine their suitability and impact on battery explosiveness. The innovative aspect lies in designating kinetic and thermodynamic parameters for lithium ions diffusion under different models during charging. The activation energy and thermodynamic properties highlight the differences and environmental friendliness of the carbon-based materials.
JOURNAL OF POWER SOURCES
(2021)
Article
Environmental Studies
Piotr Lijewski, Natalia Szymlet, Pawel Fuc, Andrzej Domowicz, Lukasz Rymaniak
Summary: This paper presents an analysis of exhaust emissions from a city scooter under actual operating conditions, showing that the application of a start-stop system can reduce emissions of certain gases significantly, but there are still significant differences compared to Euro 4 emission standards.
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT
(2021)
Review
Chemistry, Multidisciplinary
Beata Kurc, Marita Piglowska, Lukasz Rymaniak, Pawel Fuc
Summary: The application of new hybrid materials in energy storage systems has made significant progress in the past decades, with efforts to improve electrochemical performance, cyclic stability, and cell life. By modifying existing electrode materials using nano-scale materials, improvements in conductivity, energy storage efficiency, superparamagnetism, and optical properties have been achieved. Hybrid heterostructures design allows for the full utilization of each component, resulting in better cycle stability and conductivity, making nanocomposites a prevalent material with potential applications in various energy storage systems.
Article
Energy & Fuels
Lukasz Rymaniak, Michalina Kaminska, Natalia Szymlet, Rafal Grzeszczyk
Summary: The study elaborates on the assessment of harmful substance concentrations in vehicle exhaust gas cloud, finding that the ecological indicators achieve better parameters behind a moving vehicle than in stationary tests.
Article
Environmental Sciences
Marita Piglowska, Beata Kurc, Lukasz Rymaniak
Summary: This research aims to study the physicochemical properties of carbon materials obtained from different botanical origin starch (SCs) and their impact on electrochemical activity. The materials show excellent electrochemical properties attributed to good DLi+ and small resistances, with specific capacities and long cycle life, outperforming graphene nanoplatelets. The thermal modification of starches is a simple, safe and widely applicable route for engineering anode materials for lithium-ion batteries.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Engineering, Multidisciplinary
Lukasz Rymaniak, Jerzy Merkisz, Natalia Szymlet, Michalina Kaminska, Sylwester Weymann
Summary: This paper introduces a proposed proprietary M exhaust emission indicator based on the assumption that CO2 emissions reflect the correctness of the combustion process. The measurements were conducted on a farm tractor meeting Tier 3 emission standards during real plowing work at varying speeds. The study aimed to verify the emission index for off-road vehicles and compare values for different operating parameters of a farm tractor, with the lowest M identity values recorded at a vehicle speed of 15 km/h.
EKSPLOATACJA I NIEZAWODNOSC-MAINTENANCE AND RELIABILITY
(2021)
Article
Energy & Fuels
Michalina Kaminska, Lukasz Rymaniak, Piotr Lijewski, Natalia Szymlet, Pawel Daszkiewicz, Rafal Grzeszczyk
Summary: This paper presents investigations on exhaust emissions from two rail vehicles, developing a unique research methodology for detailed analysis and comparing the results with homologation standards to form a comprehensive environmental assessment.
Article
Chemistry, Physical
Marita Piglowska, Beata Kurc, Lukasz Rymaniak
Summary: The main purpose of this study is to investigate the flame retardant properties of corn starch as an additive in the classic electrolytes of lithium-ion cells. The results show that adding a suitable amount of corn starch can improve the biodegradability of the cell and prevent thermal runaway accidents. The experiments demonstrate that adding 5% corn starch is the optimal solution.
Article
Environmental Sciences
Marita Piglowska, Beata Kurc, Lukasz Rymaniak
Summary: The main purpose of these studies is to compare the diffusion coefficient and ionic conductivity of carbon-based anode materials at different temperatures, and propose an interesting method for determining the thermodynamic and kinetic parameters of lithium ion diffusion.
WASTE AND BIOMASS VALORIZATION
(2023)
Article
Engineering, Environmental
Ewelina Weidner, Beata Kurc, Bogdan Samojeden, Marita Piglowska, Agnieszka Kolodzicjczak-Radzimka, Teofil Jesionowski, Filip Ciesielczyk
Summary: This study successfully fabricated zinc oxide enriched with vanadium (ZnO/V) and evaluated its performance in SCR catalysis and electrochemical applications. The results showed that ZnO/V exhibited good crystallinity, high surface area, and high conversion rate of nitrogen oxides. It also demonstrated the potential to be used as a feed material in lithium-ion batteries.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
