Review
Chemistry, Applied
Xu Zhao, Chang-Qing Duan, Si-Yu Li, Xin-Ke Zhang, Hong-Yue Zhai, Fei He, Yu-Ping Zhao
Summary: Non-enzymatic browning is widespread in white and red wines, and it significantly affects color evolution and aging potential. Phenolic compounds, particularly those containing catechol groups, have been identified as crucial substrates in wine browning reactions. This review focuses on the understanding of non-enzymatic browning caused by monomeric flavan-3-ols in wine. It discusses the structures, origins, chemical reactivities, and potential impacts of monomeric flavan-3-ols on wine organoleptic properties, as well as the mechanisms and factors influencing non-enzymatic browning.
Article
Food Science & Technology
Jiang-Feng Yuan, Zhuo-Yao Chen, Yu-Ting Lai, Zhi-Jun Qiu, Da-Hong Wang, Jun-Feng Zhao, Jian-Rui Sun, Xin Li
Summary: This study established a model wine system to investigate the mechanism of producing xanthylium cation pigments derived from (+)-catechin dimers under microwave irradiation. The results demonstrated that four xanthylium cation pigments in the visible region at 440 nm could be obtained with low power, short time, and multiple microwave treatments. The addition of iron cations and glyoxylic acid further increased the production of xanthylium cation pigments, while mannitol inhibited their formation. This research provides a theoretical basis for enhancing the color properties of wine under microwave irradiation and suggests that microwaves could improve the sensory characteristics of wine by regulating the formation of yellow pigments during wine aging.
FOOD AND BIOPROCESS TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Rafael Ramis, Joaquin Ortega-Castro, Bartolome Vilanova, Miquel Adrover, Juan Frau
Summary: Alpha-synuclein, an intrinsically disordered protein, is associated with Parkinson's disease and other neurodegenerative disorders. Metal cations play a crucial role in influencing the aggregation propensity of alpha-synuclein, either by directly binding to it or catalyzing the production of reactive oxygen species. Molecular dynamics simulations reveal that metal binding or methionine sulfoxidation alters the conformational preferences of alpha-synuclein, leading to changes in its aggregation propensity.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Medicinal
Irfan Muhammad, Ghulam Murtaza, Yi Zhao, Aysha Sarfraz Rizvi, Shangnan Fu, Xin Su, Feng Qu
Summary: A new analytical method using free aptamer as a detection probe for the sensitive and selective detection of cadmium ions in environmental samples was developed based on capillary zone electrophoresis. This method exhibited high sensitivity and specificity, with detection within 4 minutes in the range from 5 to 250 nM and a limit of detection of 5 nM. The method can be expanded for the design of aptasensors for other targets.
JOURNAL OF CHEMICAL INFORMATION AND MODELING
(2023)
Review
Chemistry, Applied
Mario Gabrielli, Daniela Fracassetti, Elia Romanini, Donato Colangelo, Antonio Tirelli, Milena Lambri
Summary: After wine bottling, various changes can occur that can lead to the wine becoming more complex and pleasant, or potentially causing premature oxidation. Research is still needed to identify oxidation products, reliable methods for detection, and correlations between these products and the wine-bottle-closure system.
Article
Chemistry, Multidisciplinary
Zhi Zheng, Haiyang Li, Liang Hai, Ruiqi Ma, Rui Liu, Chunpeng Zhai, Zongdong Sun, Fei Wang, Ying Ma, Qingguo Xie, Xiaoding Lou, Tianyou Zhai, Fan Xia
Summary: 2D Cs3Bi2Br9 nanoflakes possess excellent optical/electrical properties and stability, making them promising for high sensitivity X-ray detection. An Ag+ assisted inversion temperature crystallization method was proposed to synthesize the nanoflakes, which passivates Br- vacancies and enhances structure stability. The high crystallinity nanoflakes exhibit direct bandgap characteristic and high mobility lifetime, enabling the development of highly sensitive optoelectronic devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Wenjing Chen, Huafeng Li, Yuzhen Jin, Wenjing Lei, Qingyun Bai, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: Converting solar energy into storable hydrogen energy using green photocatalytic technology is a reliable solution for the energy crisis. Polyoxometalates, with their unique electronic and structural properties, are promising photocatalysts for hydrogen production. Introducing noble metals greatly enhances their photocatalytic efficiency.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yixuan Shang, Lijun Cai, Rui Liu, Dagan Zhang, Yuanjin Zhao, Lingyun Sun
Summary: This study presents self-propelled structural color cylindrical micromotors (SCCMs) with reversible adsorption capability and self-reporting property, which can efficiently purify water contaminated with heavy metal ions and achieve rapid naked-eye-visible self-reporting.
Article
Chemistry, Multidisciplinary
Madhurima Chattopadhyay, Emilia Krok, Hanna Orlikowska-Rzeznik, Lukasz Piatkowski
Summary: Cellular membranes are influenced by the surrounding aqueous buffer solution, which contains various ions. Water molecules and sodium ions play a crucial role in maintaining lipid mobility and preventing the breaking of lipid phosphocholine headgroups. This study provides a molecular-level understanding of the specific dependence of lipid mobility and membrane hydration properties on ions.
Article
Biochemistry & Molecular Biology
Lingmin Dai, Yuhang Sun, Muqing Liu, Xiaoqian Cui, Jiaqi Wang, Jiming Li, Guomin Han
Summary: This study investigates the impact of oxygen exposure on acetaldehyde, color, and phenolics in dry red wine. The results show that higher levels of oxygen exposure lead to increased acetaldehyde accumulation and significant changes in color and pigments. The use of UV-spectrophotometry to measure chemical parameters allows for a scientific and effective characterization of wine oxidation degree.
Article
Environmental Sciences
Qiaopeng Tian, Yong Zhang, Di Meng, Lixin Zhai, Yu Shen, Cuiping You, Zhengbing Guan, Xiangru Liao
Summary: This study explores the impact of mediators and metal ions on the removal of tetracycline antibiotics and sulfonamide antibiotics through laccase-mediated oxidation and ferrate(VI) oxidation, as well as the removal of their antimicrobial activity. The results showed that the combination of laccase and ABTS effectively removed tetracycline, while Fe(VI) oxidation showed better removal efficiency for sulfonamide antibiotics. Metal ions had different effects on the oxidation processes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Mahesh Sundararajan
Summary: Several uranyl ions with Schiff-base ligands and redox-innocent metal ions were synthesized, and their reduction potentials were estimated. The change in Lewis acidity of the metal ions contributes to quantified values of approximately 60 mV per pKa unit. The presence of triflate molecules near the metal ions, which also increases with the Lewis acidity of the metal ions, has poorly understood and unquantified contributions to the redox potentials. In this study, the individual contributions of Lewis acid metal ions and triflate anions were quantified and analyzed using electronic structure calculations. It was found that triflate anions, especially in the case of divalent and trivalent anions, can contribute more than 50% to the predicted redox potentials, challenging the previous assumption of their innocence and highlighting their vital role in the overall reduction processes.
Review
Chemistry, Physical
Ankit Mathanker, Wendy Yu, Nirala Singh, Bryan R. Goldsmith
Summary: There is increasing interest in the influence of ions on electrocatalytic reactions. Spectator ions have not been fully explored in their impact on electrocatalytic rates of hydrogenation and oxidation of larger organic molecules. This article discusses various ways in which spectator ions can affect the electrocatalytic reactions of organic molecules and emphasizes the importance of further research in this area to develop more efficient electrocatalytic systems.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Gaowei Wang, Zhengluan Liao, Ziwei Jiang, Wenqian Cao, Yu Yang, Guodong Qian, Yuanjing Cui
Summary: The study develops a multiple-emissive luminescent sensor array for three nitrophenol isomers by loading Eu3+ and Tb3+ into a mixed-ligand LMOF. The nanoscale Eu3+/Tb3+@Uio-66-(COOH)2/NDC exhibits excellent capability to recognize three nitrophenol isomers at different concentrations and the film-based array sensor shows great portability and optical stability while maintaining distinguishing performance to nitrophenol. As a result, the strategy of constructing MOF/hydrogel film-based array sensor provides new ideas for the distinction of more analogs and makes the application of LMOFs in real life full of possibilities.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Environmental Sciences
Farhad Ahmadijokani, Hossein Molavi, Ali Peyghambari, Akbar Shojaei, Mashallah Rezakazemi, Tejraj M. Aminabhavi, Mohammad Arjmand
Summary: This article investigates the adsorption performances of unmodified and thermally oxidized nanodiamond for removing heavy metal ions from wastewater. It is found that thermally oxidized nanodiamond has higher adsorption capacities compared to unmodified nanodiamond. The study also identifies key operating parameters and optimal conditions for the adsorption process through experiments and parameter analysis.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Food Science & Technology
Maria Navarro, Nikolaos Kontoudakis, Sergio Gomez-Alonso, Esteban Garcia-Romero, Joan Miquel Canals, Isidro Hermosin-Gutierrez, Fernando Zamora
EUROPEAN FOOD RESEARCH AND TECHNOLOGY
(2018)
Article
Food Science & Technology
N. Kontoudakis, A. Mierczynska-Vasilev, A. Guo, P. A. Smith, G. R. Scollary, E. N. Wilkes, A. C. Clark
AUSTRALIAN JOURNAL OF GRAPE AND WINE RESEARCH
(2019)
Article
Food Science & Technology
Xinyi Zhang, Nikolaos Kontoudakis, John Blackman, Katja Suklje, Guillaume Antalick, Andrew C. Clark
FOOD ANALYTICAL METHODS
(2019)
Article
Chemistry, Applied
Nikolaos Kontoudakis, Leigh M. Schmidtke, Marlize Z. Bekker, Mark Smith, Paul A. Smith, Geoffrey R. Scollary, Eric N. Wilkes, Andrew C. Clark
Article
Agriculture, Multidisciplinary
Xinyi Zhang, Nikolaos Kontoudakis, Andrew C. Clark
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2019)
Article
Agriculture, Multidisciplinary
Xinyi Zhang, Nikolaos Kontoudakis, Katja Suklje, Guillaume Antalick, John W. Blackman, Douglas N. Rutledge, Leigh M. Schmidtke, Andrew C. Clark
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2020)
Article
Food Science & Technology
N. Kontoudakis, M. Smith, P. A. Smith, E. N. Wilkes, A. C. Clark
AUSTRALIAN JOURNAL OF GRAPE AND WINE RESEARCH
(2020)
Article
Chemistry, Applied
Nikolaos Kontoudakis, Andrew C. Clark
Article
Food Science & Technology
A. C. Clark, X. Zhang, N. Kontoudakis
AUSTRALIAN JOURNAL OF GRAPE AND WINE RESEARCH
(2020)
Article
Chemistry, Applied
Xinyi Zhang, Nikolaos Kontoudakis, Eric Wilkes, Neil Scrimgeour, Kieran Hirlam, Andrew C. Clark
Summary: PVI/PVP efficiently removes the least desirable form of Cu present in wine, along with its detrimental binding agent hydrogen sulfide. Different colors of wine showed varied reductions in Cu fractions after PVI/PVP treatment.
Article
Green & Sustainable Science & Technology
Dimitrios-Evangelos Miliordos, Myrto Tsiknia, Nikolaos Kontoudakis, Maria Dimopoulou, Costas Bouyioukos, Yorgos Kotseridis
Summary: In this study, resistance elicitors and phytohormones were applied to improve the grape quality of the Greek variety Mouhtaro, resulting in differences in microbial communities on different plant compartments. Chitosan treatment increased the abundance of beneficial lactic acid bacteria, while abscisic acid treatment decreased the presence of spoilage fungi on the carposphere. The use of plant activators showed potential for innovative approaches in sustainable viticulture.
Article
Food Science & Technology
Dimitrios Evangelos Miliordos, Alexandros Kanapitsas, Despina Lola, Elli Goulioti, Nikolaos Kontoudakis, Georgios Leventis, Myrto Tsiknia, Yorgos Kotseridis
Summary: Nitrogen nutrition is an effective cultural practice in vineyards, and this study investigated the impact of different nitrogen fertilizers on the agronomic characteristics and quality of grape and wine.
Article
Plant Sciences
Dimitrios Evangelos Miliordos, Anastasios Alatzas, Nikolaos Kontoudakis, Angeliki Kouki, Marianne Unlubayir, Marin-Pierre Gemin, Alexandros Tako, Polydefkis Hatzopoulos, Arnaud Lanoue, Yorgos Kotseridis
Summary: This study investigated the impact of two biostimulants, abscisic acid and chitosan, on the polyphenol metabolism of the Greek grapevine cultivar Savvatiano. The results showed that both abscisic acid and chitosan treatments increased anthocyanins during veraison, and resulted in higher amounts of stilbenoids at harvest. The gene expression related to stilbenoids and anthocyanin biosynthesis was induced by the applications of abscisic acid and chitosan, leading to increased accumulation of these compounds. However, the changes in other phenolic compound concentrations and gene expression profiles were mostly observed in the first vintage.
Article
Food Science & Technology
Xinyi Zhang, Nikolaos Kontoudakis, John W. Blackman, Andrew C. Clark
Article
Chemistry, Analytical
Andrew C. Clark, Nikolaos Kontoudakis