Article
Engineering, Environmental
Xiaochen Li, Li Yan, Wen Zhong, Michael Kersten, Chuanyong Jing
Summary: The research found that arsenate was preferentially adsorbed on α-FeOOH and TiO2, while phosphate dominated on LaOOH. The adsorbed phosphate on LaOOH had to be remobilized to allow for arsenate adsorption, but the phosphate adsorption on α-FeOOH and TiO2 was hindered by faster arsenate adsorption.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Jiaqi Liu, Fengmei Zhang, Shengping Dou, Mengyao Zhu, Lei Ding, Yanli Yang
Summary: Understanding the adsorption reactions between serine and minerals is crucial for comprehending the geochemical processes of amino acids in the environment. ATR-FTIR flow-cell measurements were used to differentiate the inner-and outer-sphere complexation and reveal the dynamic adsorption and desorption processes. DFT calculations determined the structures of surface complexes and peak assignments of serine dissolved in solution and adsorbed on TiO2.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Qiantao Shi, Shujuan Zhang, Marila Xie, Christos Christodoulatos, Xiaoguang Meng
Summary: The study investigated the effect of co-existing anions on nitrate removal by AMWS and revealed the adsorption sequence of SO4 > PO4 > NO3, providing valuable insights for understanding and predicting the applications of AMWS.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Environmental
Bingyu Li, Dongning Wei, Yimin Zhou, Yayuan Huang, Boqing Tie, Ming Lei
Summary: The study found that the interactions between Cd and arsenate on ferrihydrite depended on the Cd/As ratio, with interactions including co-precipitation and adsorption.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Qian Wu, Jinfan Chen, Yiming Ren, Yunfeng Du, Shaofei Wang, Dezhi Zhang, Junsheng Liao, Xiangke Wang
Summary: In this study, the interface interactions between phosphate and zirconium oxide surface were investigated using in-situ attenuated-total-reflection Fourier transformation infrared spectroscopy (ATR-FTIR) and density functional theory (DFT) calculations. The results showed that phosphate forms different complexes on the surface depending on the pH conditions, and the stability follows the order: mono-protonated bidentate (MB) > non-protonated bidentate (NB) > bi-protonated monodentate (BM).
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Monika A. Koperska, Jacek Bagniuk, Malgorzata M. Zaitz-Olsza, Katarzyna Gassowska, Dominika Pawcenis, Maciej Sitarz, Ewa Bulska, Joanna Profic-Paczkowska
Summary: This study investigates the degradation mechanism of silk fibroin through FTIR analysis. The results show that peptide bond oxidation occurs in the early stages of aging, regardless of conditions. Water introduction leads to significant changes in the hydrolysis of silk fibroin-based materials. The overall degradation level is affected by oxidation and hydrolysis, with decreased crystallinity and increased hydrolysis and oxidation observed in historical silk banners.
APPLIED SCIENCES-BASEL
(2023)
Article
Thermodynamics
R. Skvorcnskiene, I. Kiminaite, L. Vorotinskiene, A. Jancauskas, R. Paulauskas
Summary: Today's society faces the dual challenge of resource depletion and waste accumulation. There is a growing demand to replace conventional plastics with bioplastics in the market, but the sustainability of bioplastics compared to conventional plastics remains a subject of debate due to limited research. This study investigates the degradation characteristics of bioplastics in soil (ATR-FTIR), their thermal stability under pyrolysis, and their suitability for waste-to-energy conversion using thermal analysis (TG) and evolved gas analysis (FTIR). The biodegradation experiments reveal that only corn starch-based bioplastics can completely and rapidly degrade in soil, while other bio-based and petroleum-based plastics only undergo color change and softening. This indicates that bioplastics undergo thermochemical alteration and closely resemble conventional plastics, necessitating proper recycling or conversion into energy to avoid becoming a source of microplastics. Thermogravimetric analysis coupled with evolved gas analysis (TGA-FTIR) shows that the gas yield from bioplastics ranges from 80-99%, with degradation onset occurring at temperatures ranging from 203.0-272.5 degrees C in a nitrogen environment, or 10-20 degrees C lower in a steam-enriched environment. The main volatile products of bioplastics pyrolysis are carboxylic compounds, alkanes, alkenes, aromatic hydrocarbons, amines, CO, and CO2, depending significantly on the chemical composition of the plastic.
Article
Chemistry, Multidisciplinary
Ximena Jaramillo-Fierro, Ricardo Leon
Summary: The study investigated the ability of TiO2, La/TiO2, Ce/TiO2, and Eu/TiO2 nanoparticles to remove free cyanide from water. The results showed that La/TiO2 had the highest cyanide removal percentage (98%), followed by Ce/TiO2 (92%), Eu/TiO2 (90%), and TiO2 (88%). This suggests that La, Ce, and Eu dopants can improve the properties of TiO2 and enhance its ability to remove cyanide species from aqueous solutions.
Article
Chemistry, Physical
Asad Mahmood, Xiao Wang, Xiaofeng Xie, Jing Sun
Summary: The study investigated the adsorption and formation of nitrate species on TiO2 nanoparticles (NPs) with different morphologies under NO2 feeding gas. Different TiO2 NPs displayed distinct trends towards the stability and formation of various nitrate species. This information can be valuable in modifying TiO2-based supports for selective catalytic reduction technology.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Sahar Kafashi, Mohammad Reza Rasaei, Ehsan Eshraghi, Laura Kuhar, Andrej Bona, Aleksandar N. Nikoloski
Summary: In situ recovery involves injecting lixiviant into ore formations to extract target metals, with establishing uniform contact between the fluid and the ore being a major challenge, especially in fractured environments. Titanium dioxide nanoparticles show potential in destabilizing asphaltene deposition, but require stabilization methods for effectiveness.
MINERALS ENGINEERING
(2021)
Article
Chemistry, Physical
Federico A. Soria, Cristiana Di Valentin
Summary: This study investigates the interaction of nucleic acid components with TiO2 surfaces using dispersion-corrected hybrid DFT calculations, finding that phosphate anion and bases can anchor nucleotides collaboratively in adsorption mode, with nucleotides containing guanine base showing the strongest adsorption.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
E. P. Kovalev, A. S. Shalygin, S. A. Prikhod'ko, N. Yu Adonin, O. N. Martyanov
Summary: In this study, the absorption of acetylene by ionic liquids (ILs) was investigated using in situ ATR-FTIR spectroscopy. The analysis revealed a correlation between the spectral changes of absorbed acetylene and the nature of ILs.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Multidisciplinary
Qi Liu, Zhitao Chen, Yingzi Yang
Summary: The study investigates the difference spectra of cationic, anionic, and nonionic surfactants adsorbing onto cement particles using ATR-FTIR spectroscopy. Specific features appear at -2920 and -2850 cm-1, indicating the formation of an ordered or disordered structure on the surfactant alkyl tail. The results suggest that the heterogeneously charged mosaic surface of the cement particle consists of negatively charged isolated parts and positively charged continuous parts, arising from the distribution of hydrate phases with different electrical properties.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Metallurgy & Metallurgical Engineering
Qi Shen, Yun-hui Zhang, Ying-ju Fan, Zheng-he Xu, Zhong-Xi Sun
Summary: The study found that Cu(II) facilitated the adsorption of xanthate on the surface and led to the formation of different products. NaOH solution can effectively remove the adsorbed xanthate, while Cu(II) activated ZnO underwent an ion-exchange reaction and reorganization of adsorbed xanthate during desorption.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Geochemistry & Geophysics
Xiaoju Lin, Gaoling Wei, Xiaoliang Liang, Jing Liu, Lingya Ma, Jianxi Zhu
Summary: Sulfate and chromate, with similar chemical properties and geometrical configurations, show interesting competitive adsorption on mineral surfaces. Competitive adsorption on magnetite surfaces and the constraint mechanism have not been extensively studied, hindering the understanding of chromate and sulfate transfer and fate on magnetite surfaces. The adsorption of chromate and sulfate on Ni-substituted magnetite surfaces showed different competitiveness and affinity in varying pH conditions.
Article
Chemistry, Physical
Magdalena Mosinska, Natalia Stepinska, Waldemar Maniukiewicz, Jacek Rogowski, Agnieszka Mierczynska-Vasilev, Krasimir Vasilev, Malgorzata I. Szynkowska, Pawel Mierczynski
Article
Food Science & Technology
Agnieszka Mierczynska-Vasilev, Geridi Qi, Paul Smith, Keren Bindon, Krasimir Vasilev
Article
Chemistry, Multidisciplinary
Rahul Madathiparambil Visalakshan, Laura E. Gonzalez Garcia, Mercy R. Benzigar, Arthur Ghazaryan, Johanna Simon, Agnieszka Mierczynska-Vasilev, Thomas D. Michl, Ajayan Vinu, Volker Mailaender, Svenja Morsbach, Katharina Landfester, Krasimir Vasilev
Article
Chemistry, Physical
Audrey Beaussart, Chloe Retourney, Fabienne Quiles, Raphael Dos Santos Morais, Claire Gaiani, Henri-Pierre Fierobe, Sofiane El-Kirat-Chatel
Summary: This study utilized the high affinity ligand-receptor interaction between biotin and streptavidin to graft lysozyme onto surfaces, demonstrating enhanced antibacterial efficiency. The results suggest that bio-molecular interactions are promising for sustainable grafting of antimicrobial agents on surfaces.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Applied
Agnieszka Mierczynska-Vasilev, Keren Bindon, Richard Gawel, Paul Smith, Krasimir Vasilev, Hans-Jurgen (Hans-Juergen) Butt, Kaloian Koynov
Summary: The study used FCS to investigate the interaction between wine macromolecules and BSA, showing changes in protein conformation and complex formation with the addition of wine macromolecules. Different fractions in wine had varied effects on aggregation, with polysaccharides preventing protein-tannin complex precipitation. The application of FCS in real wines demonstrated live monitoring of heat-induced aggregation to study protein haze formation.
Article
Chemistry, Multidisciplinary
Laura E. Gonzalez-Garcia, Melanie N. MacGregor, Rahul M. Visalakshan, Artur Lazarian, Alex A. Cavallaro, Svenja Morsbach, Agnieszka Mierczynska-Vasilev, Volker Mailander, Katharina Landfester, Krasimir Vasilev
Summary: This study reveals the influence of nanoparticle surface functionalization on protein corona formation and innate immune cellular responses. The results show significant differences in protein corona composition and subsequent inflammatory consequences based on surface chemistry. The findings demonstrate the potential to direct physiological responses to nanomaterials via tailoring their surface chemical composition.
Article
Chemistry, Physical
Audrey Beaussart, Florent Canonico, Hortense Mazon, Jorge Hidalgo, Sarah Cianferani, Helene Le Cordier, Alexandre Kriznik, Sophie Rahuel-Clermont
Summary: This study investigates the non-covalent interaction mechanism and dynamics between Srx and Prx Tsa1 at the decamer level. The results show that ten Srx molecules can saturate the ten subunits of the decamer, and the complex does not dissociate in solution. Additionally, protein engineering and atomic force microscopy reveal that the flexibility of Tsa1 C-terminus controls the binding and dissociation process.
NANOSCALE HORIZONS
(2022)
Article
Chemistry, Applied
Agnieszka Mierczynska-Vasilev, Aleksey Vasilev, Tim Reilly, Keren Bindon, Krasimir Vasilev
Summary: A fast and efficient fluorescence-based method for detecting haze-forming proteins in white wine is developed, showing linear dependence and low detection limit.
Article
Chemistry, Applied
Stella Kassara, Erin L. Norton, Agnieszka Mierczynska-Vasilev, Gavin Lavi Sacks, Keren A. Bindon
Summary: A method for quantifying protein in red wine that overcomes interference from phenolic substances has been developed. The survey revealed higher than expected protein concentrations in red wines, and tannins extracted from grapes remain soluble in wine even at high protein and tannin concentrations.
Review
Microbiology
Nour Mammari, Elsa Salles, Audrey Beaussart, Sofiane El-Kirat-Chatel, Mihayl Varbanov
Summary: Squalamine and its derivatives have shown potent antibacterial, antifungal, antiprotozoa, and antiviral activities. They also exhibit potential positive effects in cancer treatment and other diseases. This review provides an overview of the various effects of squalamine and its derivatives, as well as the mechanisms of their actions on the human organism and different pathogens.
Article
Chemistry, Physical
Panthihage Ruvini L. Dabare, Akash Bachhuka, Dennis Palms, Emma Parkinson-Lawrence, John Hayball, Agnieszka Mierczynska, Krasimir Vasilev
Summary: The surface chemistry of biomaterials plays a crucial role in regulating protein adsorption, conformational changes, and immune responses. Positively charged amine and oxazoline-rich surface chemistries have the greatest impact on albumin adsorption and protein conformational changes. Pre-adsorption of albumin leads to reduced expression of pro-inflammatory cytokines and increased secretion of anti-inflammatory markers.
APPLIED SURFACE SCIENCE
(2022)
Article
Biotechnology & Applied Microbiology
Jerome F. L. Duval, Angelina Razafitianamaharavo, Isabelle Bihannic, Marc Offroy, Nicolas Lesniewska, Benedicte Sohm, Helene Le Cordier, Christian Mustin, Christophe Pagnout, Audrey Beaussart
Summary: The variation of cell-wall ultrastructure, composition, and nanomechanics of Chlorella vulgaris upon culture ageing and lysozyme treatment was investigated using a combination of atomic force microscopy (AFM) and confocal microscopy. The presence of a fibrillated mesh at the surface of cells harvested in the stationary phase was observed through AFM imaging. The structured network formed by fibrils containing the N-acetyl-D-glucosamine unit was severely damaged by lysozyme treatment. Furthermore, lysozyme was found to affect algal physiology, triggering oxidative stress and changes in cell lipid content.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Food Science & Technology
Tim Reilly, Pawel Mierczynski, Andri Suwanto, Satriyo Krido Wahono, Waldemar Maniukiewicz, Krasimir Vasilev, Keren Bindon, Agnieszka Mierczynska-Vasilev
Summary: This study aims to evaluate the ability of zeolites to cold stabilize white wines and remove proteins responsible for haze formation. Effective tartrate stabilisation and heat stability can be achieved using zeolites as a processing aid in a single treatment. The significance of this study lies in the potential of zeolites to constitute an alternative technology in white wine production, combining heat and cold stabilisation in a single treatment.
AUSTRALIAN JOURNAL OF GRAPE AND WINE RESEARCH
(2023)
Article
Chemistry, Physical
Pawel Mierczynski, Agnieszka Mierczynska-Vasilev, Waldemar Maniukiewicz, Krasimir Vasilev, Malgorzata Szynkowska-Jozwik
Summary: In this study, multi-walled carbon nanotubes (MWCNTs) were prepared by chemical vapour deposition (CVD) using acetylene as a carbon source over an iron catalyst. The feasibility of MWCNTs supported monometallic and bimetallic catalysts for hydrogen production during steam reforming of methanol (SRM) and methanol decomposition (DM) was investigated. SEM and XRD methods were used to evaluate the structural characteristics of MWCNTs. TPR and XRD methods were used to analyze the physicochemical properties of the catalysts. The promotion effect of palladium on methanol conversion rate and H2 productivity in the case of the copper catalysts was demonstrated, which was attributed to the formation of Pd-Cu alloy compound.
Article
Food Science & Technology
Agnieszka M. Mierczynska-Vasilev, Allie C. Kulcsar, Panthihage Ruvini L. Dabare, Krasimir A. Vasilev, Marlize Z. Bekker
Summary: Volatile sulfur compounds (VSCs), including hydrogen sulfide, methanethiol, and ethanethiol, are responsible for "reductive" aromas in wine and contribute to approximately 30% of all wine faults. These compounds have a significant impact on wine aroma and perceived quality, ultimately affecting consumer preference. A new method using nanoengineered surfaces with immobilized gold nanoparticles is reported for the removal of VSC compounds.
NPJ SCIENCE OF FOOD
(2023)
