Article
Chemistry, Physical
Yi-Ming Ju, Fang Huang, Xin Ding, Li-Bo Mao, Shu-Hong Yu
Summary: This study clarifies the different mineralization pathways of CaCO3 under different Mg2+ ion concentrations by tracing Mg isotope fractionation. The detailed regulatory role of Mg2+ ions at different stages of mineralization is proposed.
Article
Chemistry, Physical
Yi-Ming Ju, Fang Huang, Xin Ding, Li-Bo Mao, Shu-Hong Yu
Summary: This study investigates the mechanism of Mg2+ ion-regulated mineralization of CaCO3 by tracing Mg isotope fractionation. The different mineralization pathways of CaCO3 under different Mg2+ ion concentrations are clarified, and the detailed regulatory role of Mg2+ ions at different stages of mineralization is proposed. These results provide important insights for finely controlling the phase of crystalline products.
Article
Paleontology
L. R. Roberts, J. A. Holmes
Summary: The common brackish water ostracods Cyprideis torosa and Loxoconcha elliptica frequently coexist in marginal marine environments, and the seasonality of calcification differs between species. The Mg/Ca temperature calibration for Loxoconcha spp. has not been applied to L. elliptica before, and it may be possible to reconstruct temperatures without estimating Mg/Cawater, which is especially beneficial in highly dynamic environments. Demonstrating the applicability of the equation in marginal marine environments and tracking the seasonal calcification of L. elliptica alongside C. torosa can improve uncertainty in seasonal palaeotemperature reconstructions.
MARINE MICROPALEONTOLOGY
(2023)
Article
Geochemistry & Geophysics
Bolou Emile Bolou-Bi, Arnaud Legout, Hjalmar Laudon, Pascale Louvat, Benoit Pollier, Jerome Gaillardet, Kevin Bishop, Stephan J. Kohler
Summary: The study used stable Mg isotopes to identify potential sources of base cations in stream water in the Krycklan catchment in Sweden. Results show that magnesium in the streamwater mainly derives from groundwater, with a significant contribution during snowmelt periods. Open field rain dominates during spring floods and larger summer and autumn rainfall events. Soil solution input also contributes significantly to magnesium fluxes in streamwater.
Article
Biodiversity Conservation
Hanzhi Li, Dong Zhang, Jianhua Bai, Weiwei Lu, Xinxiao Yu, Guodong Jia
Summary: Stable carbon isotopes are a useful technique for partitioning CO2 exchange in ecosystems into GPP and respiratory components. By combining isotope technology and soil respiration, we developed a flux partitioning theory for mountain forest ecosystems and demonstrated its application using data from a temperate deciduous forest. This method provides a new approach for flux partitioning in forest ecosystems, particularly in mountain forests.
ECOLOGICAL INDICATORS
(2022)
Article
Nanoscience & Nanotechnology
Zhengxiang Song, Xiaoshi Hu, Yeyang Xiang, Kun Wu, Xiaojun Wang
Summary: The toughness of CNTs/Mg laminated composites is improved by intercepting dislocations, producing higher back stress strengthening, delaying crack propagation, and enhancing plastic deformability.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Geochemistry & Geophysics
Chris Holdsworth, John MacDonald, Cedric John
Summary: The clumped isotope values of carbonates formed in high pH conditions do not correspond to mineral precipitation temperatures due to various effects, such as kinetic isotope fractionation and dissolved inorganic carbon (DIC) endmember mixing. This study measures the clumped isotope values of anthropogenic carbonates for the first time and finds that they are higher than expected equilibrium values. The non-linear distribution of clumped isotope data suggests DIC endmember mixing, and the increase in Delta(47) values can be attributed to a combination of endmember non-linear mixing effects and an atmosphere-hydroxide sourcing of DIC. These findings highlight the potential of anthropogenic carbonate systems as archives for studying and quantifying kinetic effects in clumped isotopes.
Article
Multidisciplinary Sciences
Maciej P. Lewicki, Dominika Lewicka-Szczebak, Grzegorz Skrzypek
Summary: FRAME is a software tool for stable isotope fractionation and mixing evaluation, which allows simultaneous partitioning of sources and determination of fractionation progress. It applies a Markov-Chain Monte Carlo model and provides probability distributions of the calculated results.
Article
Materials Science, Multidisciplinary
Shengwen Bai, Liping Wei, Chao He, Lintao Liu, Zhihua Dong, Wenjun Liu, Bin Jiang, Guangsheng Huang, Dingfei Zhang, Junyao Xu, Fusheng Pan
Summary: This research investigates the effects of the layer thickness ratio (LTR) on the bendability of laminated composite sheets of dissimilar magnesium alloys. It is found that the optimum bendability is achieved at an LTR of 2:1 when the outer layer is made of magnesium alloy Gd. This phenomenon can be explained by the improved plasticity of the outer layer and the enhanced tensive-compressive asymmetry of the inner and outer layers.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Environmental Sciences
Daniel Bouchard, Patrick Hohener, Didier Gori, Daniel Hunkeler, Tim Buscheck
Summary: Several types of laboratory experiments were conducted to evaluate isotope fractionation caused by phase transfer process for a selection of common environmental contaminants. Carbon and hydrogen isotope fractionation caused by vaporization of non-aqueous phase liquid (NAPL), volatilization from water, and dissolution into an organic solvent (TGDE) were investigated. The results showed significant isotope fractionation during NAPL vaporization and volatilization from water, while no significant fractionation was observed during the air-TGDE partitioning process, except for certain compounds.
Article
Engineering, Marine
Qibin Lao, Guoqiang Liu, Jingsong Gao, Youli Shen, Qizhong Su, Chunqing Chen, Fajin Chen
Summary: Isotope measurements in the northeastern Beibu Gulf of China revealed that nitrate sources primarily originated from local pollution sources, with seasonal variations and significant impacts from human activities on the marine ecosystem, resulting in excessive nutrient levels.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Environmental
Yo Han Yang, Sae Yun Kwon, Martin Tsz-Ki Tsui, Laura C. Motta, Spencer J. Washburn, Jaeseon Park, Min-Seob Kim, Kyung-Hoon Shin
Summary: By analyzing the nitrogen and mercury isotopes of eels and pike, we found that pike has consistent mercury concentration and ecological traits, making it an effective bioindicator for mercury. Eels, on the other hand, better capture site-specific mercury sources based on their mercury concentration and feeding behavior.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Parham Pirayesh, Karnpiwat Tantratian, Maedeh Amirmaleki, Feipeng Yang, Enzhong Jin, Yijia Wang, Lyudmila V. Goncharova, Jinghua Guo, Tobin Filleter, Lei Chen, Yang Zhao
Summary: Metal anodes are highly desirable for next-generation batteries due to their high capacity and low potential. However, challenges such as dendrite growth and volume change hinder their practical applications. This study demonstrates the use of organic and inorganic hybrid interfaces to achieve stable electrochemical performance for Li- and Na-metal anodes. The optimized thicknesses of the nanoalloy interfaces differ for Li- and Na-metal anodes, and the mechanical stability of the interfaces influences the electrochemical performance. This research establishes a fundamental understanding and connection between mechanical properties and electrochemical performance for alkali-metal anodes.
ADVANCED MATERIALS
(2023)
Article
Agronomy
Yuntao Wu, Xiaodong Zhang, Zhaoliang Song, Changxun Yu, Man Liu, Yidong Wang, Qian Hao, Qiang Li, Xiangwei Zhao, Lele Wu, Xia Wang
Summary: This study investigates the spatial patterns and driving factors of carbon and nitrogen isotopes in plant-soil systems of grasslands in northern China. The results provide important references for future research on biogeochemical cycles in temperate grasslands.
Article
Marine & Freshwater Biology
Eric Bollinger, Jochen P. Zubrod, Marco Konschak, Ralf Schulz, Mirco Bundschuh
Summary: Stable isotope analysis is an important technique in food web ecology, but its effectiveness can be unclear in complex systems. The use of heavy isotope tracers has been suggested as a way to enhance the utility of stable isotope analysis, but this study found that labeling could potentially affect isotopic fractionation and bias conclusions. While the physiological and activity levels of organisms in autotrophy-based and detritus-based aquatic food webs were not significantly affected by labeling, the study supported the isotopic redundancy hypothesis, which suggests that metabolic processes can be altered by discrete quantum mechanical states.
AQUATIC TOXICOLOGY
(2023)
Article
Green & Sustainable Science & Technology
P. Oprckal, A. Mladenovic, N. Zupancic, J. Scancar, R. Milacic, V. Zalar Serjun
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Biochemistry & Molecular Biology
Katarina Markovic, Radmila Milacic, Stefan Markovic, Jerneja Kladnik, Iztok Turel, Janez Scancar
Article
Biochemistry & Molecular Biology
Angelika Vizintin, Janja Vidmar, Janez Scancar, Damijan Miklavcic
BIOELECTROCHEMISTRY
(2020)
Article
Biochemistry & Molecular Biology
Angelika Vizintin, Stefan Markovic, Janez Scancar, Damijan Miklavcic
Summary: The study found that nanosecond electric pulses combined with chemotherapeutics resulted in successful cell kill, but higher extracellular concentrations of bleomycin were needed. Decreasing the pulse duration to nanoseconds and increasing the amplitude reduced the release of aluminum ions from electroporation cuvettes.
BIOELECTROCHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Guanglong Ma, Nina Kostevsek, Ilaria Monaco, Amalia Ruiz, Bostjan Markelc, Calvin C. L. Cheung, Samo Hudoklin, Mateja E. Kreft, Hatem A. F. M. Hassan, Matthew Barker, Jamie Conyard, Christopher Hall, Stephen Meech, Andrew G. Mayes, Igor Sersa, Maja Cemazar, Katarina Markovic, Janez Scancar, Mauro Comes Franchini, Wafa T. Al-Jamal
Summary: This study investigates the effect of PD1 blockade in combination with photothermally-activated low temperature-sensitive magnetoliposomes (mLTSL) loaded with doxorubicin for cancer therapy. The results demonstrate the efficient drug delivery and imaging capabilities of mLTSL, as well as the potentiation of therapeutic efficacy when combined with anti-PD1 monoclonal antibody.
JOURNAL OF CONTROLLED RELEASE
(2021)
Article
Chemistry, Analytical
Stefan Markovic, Katja Ursic, Maja Cemazar, Gregor Sersa, Barbara Staresinic, Radmila Milacic, Janez Scancar
Summary: This study optimized instrumental parameters for bioimaging of Pt in HT29 tumor spheroids treated with different types of cisplatin using LA-ICP-MS. The results showed that TR-CDDP-treated spheroids had significantly lower Pt concentrations compared to CDDP-treated spheroids, with Pt mainly distributed in the outer rim area. The study also demonstrated good agreement in terms of spatial distribution of TR-CDDP between confocal fluorescence microscopy and LA-ICP-MS.
ANALYTICA CHIMICA ACTA
(2021)
Article
Green & Sustainable Science & Technology
Hrvoje Caric, Neven Cukrov, Dario Omanovic
Summary: Copper, essential for phytoplankton growth, has a narrow range between optimal concentrations and toxic levels in marine environments. Ship traffic, particularly during maritime tourism seasons, can significantly increase copper concentrations, posing toxicity risks to both the environment and human health. Mapping maritime traffic patterns can help identify potential risks and serve as an effective assessment tool for marine stakeholders.
Article
Chemistry, Multidisciplinary
Marija Duric, Primoz Oprckal, Vesna Zalar Serjun, Alenka Mauko Pranjic, Janez Scancar, Radmila Milacic, Ana Mladenovic
Summary: The study demonstrated that paper-ash showed high efficiency and stability in remediation of heavily contaminated soils with metals by immobilizing Cd, Pb, and Zn in newly formed mineral phases. Sulfate treatment did not impact the remediation efficiency.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Vito Kovac, Borut Poljsak, Matic Bergant, Janez Scancar, Uros Mezeg, Jasmina Primozic
Summary: This study assessed the composition of released metal ions from fixed orthodontic appliances in both in vitro and in vivo settings, and found differences in the metal ion content between these two environments. The concentration of released metal ions from all tested alloys was below the upper recommended limit of daily intake, but possible local effects in terms of hypersensitivity cannot be excluded even with such concentrations.
Article
Biochemistry & Molecular Biology
Vito Kovac, Matic Bergant, Janez Scancar, Jasmina Primozic, Polona Jamnik, Borut Poljsak
Summary: This study investigated the metal composition and release of metal ions from orthodontic alloys, as well as the oxidative consequences that the metal ions may cause in the cell. The results showed that beta titanium alloy released the fewest metal ions and did not cause oxidative stress or protein damage. Stainless steel and cobalt-chromium alloy, on the other hand, can cause oxidative stress and protein damage at high concentrations. All metal ions from orthodontic alloys alter the activity of antioxidant enzymes in some way.
Article
Engineering, Marine
Ante Siljeg, Ivan Maric, Fran Domazetovic, Neven Cukrov, Marin Lovric, Lovre Panda
Summary: This study presents a new user-friendly and methodological semi-automatic approach of point cloud post-processing error removal for underwater floor mapping. The study focused on the St. Anthony Channel in Croatia and successfully created a high-resolution integral model using multibeam echosounders and UAV data, which can be used for maritime safety and tourism promotion.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Tea Zuliani, Janja Vidmar, Janez Scancar, Margareta Kracun Kolarevic, Stoimir Kolarevic, Momir Paunovic, Radmila Milacic
Summary: During extreme hydrological conditions such as floods, sediments and alluvial soils can be re-suspended, leading to increased concentration of solid particulate matter in the water column. This study evaluated the release of potentially toxic elements associated with solid particulate matter during flash floods. The results showed different contamination levels at the two sampling sites, indicating the importance of considering local river characteristics.
Article
Environmental Sciences
Janja Vidmar, Tea Zuliani, Radmila Milacic, Janez Scancar
Summary: This study reports for the first time the levels of anthropogenic titanium dioxide nanoparticles (TiO(2)NPs) in different compartments of the Sava River and identifies urban, agricultural, and/or industrial activities as the main sources of these particles. The results also highlight the significant influence of hydrological conditions and sediment composition on the levels of TiO(2)NPs in river water.
Article
Geochemistry & Geophysics
Luis F. Auque, M. Cinta Osacar, Concha Arenas, Neven Cukrov, Sonja Lojen, Carlos Sancho
Summary: The Mg/Ca elemental ratio of calcite as a temperature indicator in continental carbonate deposits is unreliable due to the influence of other factors on Mg partitioning between water and calcite. The correction of detrital Mg content and other parameters such as water discharge and calcite precipitation rates may affect the relationship between Mg/Ca and water temperature. The wide variety of parameters involved in Mg/Ca ratio limits its use as a geochemical thermometer in continental sedimentary environments.
Article
Chemistry, Analytical
Katarina Markovi, Maja Cemazar, Gregor Sersa, Radmila Milacic, Janez Scancar
Summary: In this study, a conjoint liquid chromatography method was used to separate different forms of copper in serum, and the separated copper species were quantified using mass spectrometry and UV detection. The method showed high sensitivity and good repeatability, and can be applied for copper determination in different populations.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Article
Geochemistry & Geophysics
Zhen-Min Ge, Xiao-Long Huang, Wei Xie, Tobias W. Hofig, Fan Yang, Yang Yu, S. Khogenkumar Singh
Summary: The mantle source composition of the nascent oceanic crust in the central part of the Gulf of California has been investigated using basaltic glass samples. These samples show trace element patterns similar to enriched mid-ocean ridge basalts, suggesting that the nascent oceanic crust in the Guaymas Basin might be generated through partial melting of a depleted mantle source metasomatized by subducted slab materials.
Article
Geochemistry & Geophysics
Jean-Michel Brazier, Katja E. Goetschl, Martin Dietzel, Vasileios Mavromatis
Summary: This study estimated the distribution coefficient of Zn2+ between calcite/aragonite and reactive fluids and found that the growth rate strongly influences D-Zn(2+) in both minerals. Additionally, a linear correlation was found between D-Zn(2+) and the saturation degree of the reactive fluid.
Article
Geochemistry & Geophysics
Ming Lei, Michele Lustrino, Jifeng Xu, Zhiqiang Kang, Zhengfu Guo, Jianlin Chen
Summary: This study presents a comprehensive geochronological, mineralogical, and geochemical analysis of olivine leucitites in the Maiga area of southern Tibet, suggesting that these rocks originate from a carbonated peridotite mantle source and highlighting the possibility of carbonates being recycled deep into the mantle during continental subduction.
Article
Geochemistry & Geophysics
Yuntao Ye, Xiaomei Wang, Huajian Wang, Haifeng Fan, Zhigang Chen, Qingjun Guo, Ziteng Wang, Chaodong Wu, Donald E. Canfield, Shuichang Zhang
Summary: Phosphorus is an essential element for life and its cycle in the ocean is closely connected with the carbon and oxygen cycles. The study of phosphate oxygen isotopes can provide insights into various reactions related to phosphorus. By analyzing carbonate fluorapatite samples from the Mesoproterozoic Era in North China, it was found that the oxygen isotope values were lower compared to modern samples, indicating a warmer climate during that time period and a potential reason for the scarcity of phosphorite.
Article
Geochemistry & Geophysics
Vincent Busigny, Oanez Lebeau, Didier Jezeduel, Carine Chaduteau, Sean Crowe, Magali Ader
Summary: This study conducted high-precision Mo isotope research on hydrothermal metal sulfides from a porphyry copper deposit in Southwest China and found that different stages of mineralization have distinct Mo isotope compositions, providing valuable insights into the behavior of Mo isotopes in magmatic-hydrothermal systems.
Article
Geochemistry & Geophysics
Min Ji, Xiao-Ying Gao, Yong-Fei Zheng, Bing Gong
Summary: The study examines the anatectic mechanisms in the Himalayan orogen, finding that pressure and temperature control the reaction, while water content mainly affects the solid-phase composition. Dehydration and hydration melting likely occur at different depths in the crust. This research provides important insights into the melting processes in collisional orogens.