Article
Chemistry, Physical
L. Rogstrom, M. Moreno, J. M. Andersson, M. P. Johansson-Joesaar, M. Oden, K. Klementiev, L-A Naslund, M. Magnuson
Summary: Changes in the structure of Ti1-xAlxN coated tool inserts used for turning in 316L stainless steel were examined using XANES, EXAFS, EDS, and STEM. XANES spectra indicated the formation of TiN-enriched domains in coarse-grained Ti1-xAlxN coatings with varying Al-content. XANES Ti 1s line-scans revealed that spinodal decomposition resulted in the formation of TiN-enriched domains during turning in Ti0.47Al0.53N and Ti0.38Al0.62N samples. EDS analysis showed the adherence of Cr and Fe from the steel to the tool rake face during machining.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
J. Padchasri, N. Triamnak, T. Sareein, J. Jutimoosik, S. Tongsaeng, A. Bootchanont, P. Kidkhunthod, S. Rujirawat, P. Manyum, R. Yimnirun
Summary: The structural characterizations of Fe-substituted Barium Titanate ceramics prepared at different sintering temperatures were investigated using XRD and XAS techniques. The results showed a transformation in structure from tetragonal to hexagonal with increasing sintering temperature, and the oxidation state of Fe ion in Fe-BaTiO3 was identified as Fe3+ through XANES data. Comparisons between measured and calculated XANES spectra were used to examine the effect of different sintering temperatures on the local structure around the Ti atom, highlighting the importance of XANES investigations in exploring the local structure evolution in Fe-BaTiO3 ceramics.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Soil Science
Jirapat Tuntrachanida, Worachart Wisawapipat, Surachet Aramrak, Natthapol Chittamart, Wantana Klysubun, Penphitcha Amonpattaratkit, Olivier Duboc, Walter W. Wenzel
Summary: The speciation and solubility of solid-phase phosphorus in soil play a crucial role in determining the speciation and concentration of aqueous phosphorus. This study investigates the importance of solid-phase phosphorus species in phosphorus fluxes in diverse soil conditions rich in iron/aluminum/calcium compounds.
Article
Biochemistry & Molecular Biology
S. Morante, S. Botticelli, R. Chiaraluce, V. Consalvi, G. La Penna, L. Novak, A. Pasquo, M. Petrosino, O. Proux, G. Rossi, G. Salina, F. Stellato
Summary: This study investigates the stability of wild-type frataxin and its variants upon Co2+ binding, and confirms the stability ranking through comparative analysis of XAS spectra. The acidic ridge of frataxin is identified as the most likely location for metal binding sites, and the N-terminal disordered tail is found to modulate the protein's ability to interact with the metal.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2022)
Article
Soil Science
Apinya Saentho, Worachart Wisawapipat, Phrueksa Lawongsa, Surachet Aramrak, Nattaporn Prakongkep, Wantana Klysubun, Iso Christl
Summary: In tropical sandy soils with low total and available phosphorus content, Al/Fe (hydr)oxides and kaolinite play a pivotal role in controlling the pH-dependent solubility of PO4-P.
Article
Environmental Sciences
Christoph E. Schrank, Michael M. W. Jones, Cameron M. Kewish, Grant A. van Riessen, Kathryn E. Elphick, Craig R. Sloss, Luke D. Nothdurft, Gregory E. Webb, David J. Paterson, Klaus Regenauer-Lieb
Summary: The study reveals the importance of micro-dissolution structures in deep-sea limestones for modulating carbon exchange between the geosphere and hydrosphere in the long-term carbon cycle.
COMMUNICATIONS EARTH & ENVIRONMENT
(2021)
Review
Engineering, Chemical
Ana Iglesias-Juez, Gian Luca Chiarello, Gregory S. Patience, M. Olga Guerrero-Perez
Summary: X-ray absorption spectroscopy (XAS) is a technique used to measure electron absorption spectra and study chemical bonds on catalyst surfaces. Researchers are developing new X-ray sources to measure catalyst stability and handle toxic substances.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Ceramics
Wipada Senanon, Phornchanok Phaiboon, Narong Chanlek, Yingyot Poo-arporn, Supree Pinitsoontorn, Santi Maensiri, Jessada Khajonrit, Pinit Kidkhunthod
Summary: The study successfully synthesized Li2S-2H(3)BO(3) glasses with and without 4 mol% MnO2 dopant. The doped glasses showed improved magnetic and electrochemical properties, especially in pseudocapacitance. Additionally, the application of XRD, TEM, UV-Vis, and XANES techniques provided new insights into the properties of the glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Carlos A. Ortiz-Bravo, Santiago J. A. Figueroa, Raquel Portela, Carlos A. Chagas, Miguel A. Banares, Fabio Souza Toniolo
Summary: The performance of the Mn-Na2WO4/SiO2 catalyst for oxidative coupling of methane (OCM) has been attributed to crystalline phases that are not present at reaction temperatures. The evolution of W and Mn sites structure was monitored, showing phase transitions and changes in bond order with temperature. Steady-state experiments demonstrated that Mn3+ sites are more active in methane activation.
JOURNAL OF CATALYSIS
(2022)
Article
Environmental Sciences
Luke T. Townsend, Katherine Morris, Robert Harrison, Bianca Schacherl, Tonya Vitova, Libor Kovarik, Carolyn Pearce, J. Frederick W. Mosselmans, Samuel Shaw
Summary: Uranium is a key environmental radionuclide that can be effectively immobilized by sulfidation of nanomagnetite. Studies show that despite reducing conditions, sulfidation can transfer a significant portion of uranium to the solid phase and retain its stability over a long period of time.
Article
Materials Science, Ceramics
V Jacobson, J. Huang, C. J. Titus, R. W. Smaha, M. Papac, S. J. Lee, A. Zakutayev, G. L. Brennecka
Summary: Many previous studies on the entropy-stabilized oxide (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)O have focused on applications, neglecting a fundamental exploration of the effects of anion stoichiometry and/or redox chemistry on electrical properties. In this study, the authors use near-edge X-ray absorption fine structure (NEXAFS) and electrical measurements to show that oxidizing thin film samples of (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)O primarily affects the valence of Co, leading to increased electrical conduction. They also find that bulk samples sintered in an oxygen-rich atmosphere have lower activation energy for electrical conduction compared to those equilibrated in a nitrogen atmosphere. Based on defect compensation scenarios, electrical impedance measurements, and NEXAFS data, the authors propose a self-consistent interpretation of Co redox-mediated small polaron conduction as the dominant charge transfer method in this system.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Edyta Piskorska-Hommel, Aneta Ciupa-Litwa
Summary: This paper reports the X-ray Absorption Fine Structure (XAFS) study of mixed-valence iron(II)-iron(III) formate frameworks undergoing order-disorder phase transitions. The analysis reveals slight changes in electron transfer and bond lengths during the phase transitions, defining the nature of the transition.
Article
Chemistry, Multidisciplinary
Daniele Del Giudice, Francesco Tavani, Marika Di Berto Mancini, Federico Frateloreto, Matteo Busato, Danilo Oliveira De Souza, Flavia Cenesi, Osvaldo Lanzalunga, Stefano Di Stefano, Paola D'Angelo
Summary: This study combines X-Ray Absorption and H-1 NMR spectroscopies with Multivariate Curve Resolution and theoretical analyses to comprehensively investigate a prototypical reaction involving the variation of oxidation state and local structure environment of a metal ion coordinated by organic ligands. The interdisciplinary approach provides insights into the nature, concentration time evolution, and structures of key metal and organic species during the reaction process. This method may prove to be a valuable tool in understanding reactive processes of interest in solution.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Computer Science, Interdisciplinary Applications
Maurizio Benfatto, Stefano Della Longa, Elisabetta Pace, Giovanni Chillemi, Cristiano Padrin, Calogero R. Natoli, Nico Sanna
Summary: X-ray absorption spectroscopy (XAS) is a powerful method for obtaining electronic and structural information, particularly in the XANES region, which contains rich data. The MXAN method utilizes experimental data and theoretical calculations to extract local structural information, with the latest version allowing analysis of time-dependent XANES data.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Spectroscopy
Wolfgang Malzer, Christopher Schlesiger, Birgit Kanngiesser
Summary: In recent years, new instrumentation for laboratory X-ray Absorption Spectroscopy (XAS) has sparked interest and debate, leading to a growing number of experiments and analytical applications. The principles and applications of these instruments are discussed, highlighting their significance in research within the fields of chemistry and materials science.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2021)
Article
Forestry
Paula Pongrac, Edita Baltrenaite, Primoz Vavpetic, Mitja Kelemen, Ales Kladnik, Bojan Budic, Katarina Vogel-Mikus, Marjana Regvar, Pranas Baltrenas, Primoz Pelicon
TREES-STRUCTURE AND FUNCTION
(2019)
Article
Environmental Sciences
Emna Fourati, Katarina Vogel-Mikus, Taoufik Bettaieb, Anja Kavcic, Mitja Kelemen, Primoz Vavpetic, Primoz Pelicon, Chedly Abdelly, Tahar Ghnaya
Article
Environmental Sciences
Mingxi Zhou, Tahar Ghnaya, Helene Dailly, Guangling Cui, Brigitte Vanpee, Ruiming Han, Stanley Lutts
Article
Plant Sciences
Nada Bensalem, Sabeh M'rah Helali, Mohamed Chebbi, Tahar Ghnaya, Zeineb Ouerghi
JOURNAL OF PLANT NUTRITION
(2020)
Article
Plant Sciences
Stephan Hoereth, Paula Pongrac, Johannes T. van Elteren, Marta Debeljak, Katarina Vogel-Mikus, Michael Weber, Manuel Braun, Bjoern Pietzenuk, Matic Pecovnik, Primoz Vavpetic, Primoz Pelicon, Iztok Arcon, Ute Kraemer, Stephan Clemens
Article
Plant Sciences
Taoufik Amari, Aymen Souid, Rim Ghabriche, Mauro Porrini, Stanley Lutts, Gian Attilio Sacchi, Chedly Abdelly, Tahar Ghnaya
Article
Environmental Sciences
Imen Ayachi, Rim Ghabriche, Yan Kourouma, M'barek Ben Naceur, Chedly Abdelly, Sebastien Thomine, Tahar Ghnaya
Summary: The study found significant differences in cadmium tolerance and accumulation among different barley cultivars, with some cultivars being sensitive to cadmium while others are relatively tolerant. There are also variations in the accumulation of cadmium in different organs of barley plants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Plant Sciences
Mabrouka Bouabdallah, Hela Mahmoudi, Tahar Ghnaya, Hedia Hannachi, Ali Taheri, Zeineb Ouerghi, Chiraz Chaffei-Haouari
Summary: The exogenous application of spermidine (Spd) has been found to significantly improve salt stress resistance in durum wheat. Spd treatment increased plant fresh and dry weight, as well as soluble sugars and chlorophyll content, particularly under high salt concentrations. However, Spd treatment led to decreased proline content and glutamate dehydrogenase (GDH) enzyme activity.
PAKISTAN JOURNAL OF BOTANY
(2022)
Article
Environmental Sciences
Ghazwa Boudali, Tahar Ghnaya, Saoussen Ben-Abdallah, Abdallah Chalh, Abdelaziz Sebei, Zeineb Ouirghi, Chiraz Chaffei-Haouari
Summary: In this study, the researchers investigated the effect of homeopathic drug Zincum Metallicum (ZM) on zinc toxicity in Lepidium sativum L, a plant species. They found that ZM was able to alleviate the oxidative damage caused by zinc by reducing zinc accumulation and translocation in the plant.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Imen Ayachi, Rim Ghabriche, Ameni ben Zineb, Mohsen Hanana, Chedly Abdelly, Tahar Ghnaya
Summary: The effect of sodium chloride (NaCl) on cadmium (Cd) tolerance, uptake, translocation, and compartmentation in barley was studied. NaCl did not significantly affect plant development and biomass production, but Cd alone reduced plant development rate and biomass production. NaCl addition accentuated the Cd effect on plant growth. NaCl limited Cd accumulation in the roots and shoots by reducing Cd-absorption efficiency and translocation. However, NaCl increased Cd toxicity and limited plant yield.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Amira K. Hajri, Noureddine Hamdi, Amnah A. Alharbi, Sahr A. Alsherari, Doha A. Albalawi, Eman Kelabi, Tahar Ghnaya
Summary: Halophytes, especially Sesuvium portulacastrum, have been shown to efficiently accumulate and extract Cd2+ and Zn2+ from saline contaminated water.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Applied
Karen J. Cloete, Ziga Smit, Roya Minnis-Ndimba, Primoz Vavpetic, Anton du Plessis, Stephan G. le Roux, Primoz Pelicon