Article
Biochemistry & Molecular Biology
Andrei Dmitrenko, Michelle Reid, Nicola Zamboni
Summary: The broad coverage of untargeted metabolomics poses challenges for measurement harmonization over time. To address this, researchers propose a system suitability testing platform for time-of-flight mass spectrometers. The platform can verify instrument performance before sample injection and offers various applications.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2022)
Review
Chemistry, Analytical
Claire Charles, Jean-Alix Barrat, Ewan Pelleter
Summary: An optimal analytical procedure specific to ferromanganese (Fe-Mn) oxides was proposed through investigating different modes of data acquisition. The results showed that high-resolution acquisition mode is unnecessary to achieve high quality data for Rare Earth Elements (REE) in Fe-Mn oxides.
Article
Geosciences, Multidisciplinary
Quan-feng Zheng, Hua Zhang, Dong-xun Yuan, Yue Wang, Wen-qian Wang, Chang-qun Cao, Shu-zhong Shen
Summary: This study reconstructs the variations in benthic marine oxygen levels from the Late Permian to the Early Triassic in the Shangsi section, China, using high-resolution trace fossil data and other redox-sensitive proxies. The results show the presence of both high-frequency and long-term variations in benthic oxygen levels, as well as an anoxia event during the middle-late Wuchiapingian and a global oxygenation event during the Changhsingian.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geochemistry & Geophysics
Eszter Sendula, Benjamin C. Gill, J. Donald Rimstidt, Tim K. Lowenstein, Mebrahtu F. Weldeghebriel, Javier Garcia-Veigas, Robert J. Bodnar
Summary: Previous studies have confirmed that primary fluid inclusions in halite can record and preserve information about the major ion chemistry of seawater. In this study, the ratios of redox sensitive trace metals in primary fluid inclusions in halite from two boreholes in the Polish sector of the European Southern Permian Basin were determined. The results show that the trace metal abundances in fluid inclusions vary in response to changes in seawater redox conditions, indicating their potential as a redox proxy.
Article
Geography, Physical
Haijun Peng, Kunshan Bao, Lingui Yuan, Masao Uchida, Cheng Cai, Yongxuan Zhu, Bing Hong, Qian Guo, Hanwei Ding, Hu Yao, Yetang Hong
Summary: Analysis of a peat archive from the Hengduan Mountains reveals the rapid changes in monsoonal climate in East Asia since the last deglaciation, with a close connection between dust fluxes in the Yuexi peatland and Asian monsoon variations. The study also demonstrates the significant contribution of human activities to dust fluxes during the late Holocene.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Forestry
KaDonna C. Randolph
Summary: Number preference is a potential source of bias in forest inventory, and this study evaluated the presence and factors influencing number preference in U.S. national forest inventory data. Results showed that observations ending with certain digits (ED0,5) occurred more frequently than expected by chance, especially when visually estimated rather than instrumentally measured. Factors such as species class, tree status, and plot-level water depth varied in their effect on number preference. Findings also suggest that some inventory regions may be using a shortcut that results in a higher proportion of certain observations (M-4) among seedling counts.
Article
Geosciences, Multidisciplinary
Fan Yi, Haisheng Yi, Guoqing Xia, Chihua Wu, Gaojie Li, Zhanhu Cai, Na Li
Summary: The Lower Jurassic oil shales in the Bilong Co area are the most important hydrocarbon source rocks in the southern Qiangtang Basin, deposited primarily from marine plankton/algae under suboxic conditions with minimal freshwater input. The deposition of these shales was driven by preservation rather than productivity, influenced by sluggish oceanic circulation and a hydrographically restricted setting.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Chemistry, Analytical
Youwei Chen, Zhuojun Xie, Shaohua Dong, Quanliang Lei, Jianfeng Gao
Summary: Nano-scale secondary ion mass spectroscopy (NanoSIMS) is a powerful tool for determining the sulfur isotope composition of micrometer-sized minerals. The proposed method in this study combines high lateral resolution with high precision, providing accurate results for delta S-34 analysis. The method has been successfully used to analyze framboidal pyrite samples, showing its applicability in determining the S isotopic characteristics of mineral deposits.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Article
Geography, Physical
Chengsheng Jin, Zhiwei Liao, Gary G. Lash
Summary: The study suggests that fluctuations in redox conditions, in addition to commonly cited thresholds of bimetal ratios, may have influenced the redox trends during the Ordovician-Silurian transitional interval. The strong correlation between changing redox conditions and fossil distributions implies that dynamic and ferruginous conditions contributed to biotic crises. The coupling of total organic carbon (TOC) and redox proxies highlights the importance of prolonged anoxia or euxinia in the accumulation and preservation of organic matter.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Review
Pharmacology & Pharmacy
C. Michael White
Summary: The current levels of lead in mineral and MVM products have decreased over time, but some products may still contain excessive amounts. Consumers have difficulty knowing the actual lead content in products, highlighting the need for independent third-party lab testing.
ANNALS OF PHARMACOTHERAPY
(2022)
Article
Geosciences, Multidisciplinary
Qiong Zhang, El Mahdi Bendif, Yu Zhou, Bruno Nevado, Roxana Shafiee, Rosalind E. M. Rickaby
Summary: Variable trace metal concentrations in the Precambrian ocean were closely linked to oxygen availability. However, less is known about the drivers of seawater trace metal chemistry after the spread of complex life into the Phanerozoic eon. The dominance shift from green Archaeplastida to secondary endosymbiotic algae with red-algal-derived plastids in the transition from the Palaeozoic to the Mesozoic era resulted in major changes in ocean chemical buffering.
Article
Spectroscopy
Jialong Hao, Sen Hu, Ruiying Li, Jianglong Ji, Huicun He, Yangting Lin, Wei Yang
Summary: This paper presents a high analytical precision method for measuring the CI isotopic composition of apatite using a CAMECA NanoSIMS 50L instrument with Faraday cup detectors. By optimizing the instrument configuration and adjusting the primary beam settings, high-precision measurements of chlorine isotopes with high spatial resolutions can be achieved, which can be applied to small apatite minerals in extraterrestrial samples.
ATOMIC SPECTROSCOPY
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Huagang Yan, Paul De Jean, Elliot Grafil, Ramish Ashraf, Thomas Niedermayr, Melvin Astrahan, Prithvi Mruthyunjaya, Beth Beadle, Lei Xing, Wu Liu
Summary: In this study, a fast and low-cost radio-luminescent imaging and dose calculating system was developed to verify the seed activity distribution for differential loading. The results showed that possible errors could be detected using this system.
Article
Energy & Fuels
Beilei Sun, Fangui Zeng, Tim A. Moore, Sandra Rodrigues, Chao Liu, Guoquan Wang
Summary: Prospecting for trace and rare earth elements is expected to increase in the future as the world adopts sustainable energy and digital technology. This study investigates the distribution of trace elements, especially lithium, in coal beds in Shanxi Province, China. The research finds that trace elements, including lithium, are associated with the inorganic portion of the coal seams.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Engineering, Mechanical
Zhibo Yang, Jiahui Cao, Shuming Wu, Xuefeng Chen
Summary: This research proposes a single probe-based method for identifying vibration parameters of rotating blades, and constructs a high-resolution sampling aliasing frequency distribution using the synchrosqueezing adaptive window length short-time Fourier transform to improve the accuracy of parameter estimation. Moreover, a new fitting model that considers the rotational effect is developed to extract vibration parameters from the distribution.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Environmental Sciences
Igor Zhdanov, Alexey Lokhov, Artem Belesov, Aleksandr Kozhevnikov, Svetlana Pakhomova, Anfisa Berezina, Natalia Frolova, Ekaterina Kotova, Andrey Leshchev, Xinhong Wang, Peter Zavialov, Evgeniy Yakushev
Summary: The Northern Dvina River is a major source of microplastic pollution in the White and Barents Seas, with no significant seasonal variation in microplastic export. The highest export rate occurs during the spring flood period.
MARINE POLLUTION BULLETIN
(2022)
Review
Environmental Sciences
Eva Ramirez-Llodra, Hilde Cecilie Trannum, Guri S. Andersen, Nicole J. Baeten, Steven J. Brooks, Carlos Escudero-Onate, Hege Gundersen, Rolf Arne Kleiv, Olga Ibragimova, Aivo Lepland, Raymond Nepstad, Roar Sandoy, Morten Thorne Schaanning, Tracy Shimmield, Evgeniy Yakushev, Laura Ferrando-Climent, Per Helge Hogaas
Summary: A multidisciplinary programme in Norway has studied the environmental impacts of submarine tailing disposal (STD), providing new knowledge for global assessments and mitigation. Through detailed seafloor mapping, modelling, and toxicity tests, they have developed tools for monitoring and assessing the behavior of tailing particles and chemicals. Results suggest that full community recovery and normalization of metal leakage rates from sulfidic tailings may take several decades.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Svetlana Pakhomova, Anfisa Berezina, Amy L. Lusher, Igor Zhdanov, Ksenia Silvestrova, Peter Zavialov, Bert van Bavel, Evgeniy Yakushev
Summary: Comparative investigations of microplastic occurrence in the global ocean are often hindered by different research methods. This study used the same approach during five cruises to investigate microplastic in five regions of the World Ocean. The results showed regional differences in microplastic characteristics and concentration, with the Northern Hemisphere mainly influenced by terrestrial input and the Southern Hemisphere affected by offshore industries.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Thuy-Chung Kieu-Le, Quoc-Thinh Thuong, Tran-Nguyen-Sang Truong, Thi-Minh-Tam Le, Quoc-Viet Tran, Emilie Strady
Summary: This study examines the presence of microplastics in the Mekong River Delta in Vietnam and finds that both surface water and sediment contain microplastics, with a predominance of microplastic fibers. The concentration of microplastics is stable in surface water but influenced by high dynamic flow in sediment.
MARINE POLLUTION BULLETIN
(2023)
Article
Biotechnology & Applied Microbiology
Thi-Minh-Tam Le, Tran-Nguyen-Sang Truong, Phuoc-Dan Nguyen, Quang-Do-Thanh Le, Quoc-Viet Tran, Thanh-Tho Le, Quoc-Hung Nguyen, Thuy-Chung Kieu-Le, Emilie Strady
Summary: Wastewater treatment plants in Vietnam are significant sources of microplastics in receiving waters, with varying abundance, removal efficiency, and daily load. The changes in microplastics abundance, morphology, and removal efficiency were observed after different treatment stages.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Engineering, Marine
Maria Mikusheva, Maria Pogojeva, Ekaterina Kotova, Alexsander Kozhevnikov, Eleonora Danilova, Anfisa Berezina, Evgeniy Yakushev
Summary: This study provides the first assessment of floating macro litter input from the Northern Dvina and Onega rivers to the White Sea. The observations show that the majority of floating objects are of natural origin, with plastics being the dominant anthropogenic litter. The study also reveals that the level of pollution in these rivers is higher than some European rivers but lower than in China.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Marine
Igor Zhdanov, Svetlana Pakhomova, Anfisa Berezina, Ksenia Silvestrova, Natalia Stepanova, Evgeniy Yakushev
Summary: Plastic pollution is a recognized threat to marine ecosystems, and many studies aim to estimate the level of plastic and microplastics pollution in the World Ocean. However, the use of different methods for sampling and analyzing microplastics leads to difficulties in comparing the results. Surface and subsurface microplastics differ not only in size, but also in morphology, polymer types, abundance, weight concentration, and spatial distribution. This study investigates the distribution of surface and subsurface microplastics in the Central Atlantic and how oceanographic conditions influence their spatial distribution.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Environmental Sciences
Cathrine Brecke Gundersen, Evgeniy Yakushev, Petr Terentjev, Nikolai Kashulin, Vladimir Korobov, Natalia Frolova, Alexander Romanov, Una Jermilova, Alexey Lokhov, Igor Miskevich, Ekaterina Kotova, Eirik Hovland Steindal, Hans Fredrik Veiteberg Braaten
Summary: Arctic rivers are a significant source of mercury (Hg) to the Arctic Ocean, but there is limited knowledge about the terrestrial release sources and Hg levels in these rivers. This study provides an overview of potential Hg release sources in the Barents region, known for its high industrial development. The results highlight occasional exceedance of pollution control limits in freshwater bodies near these sources, posing a concern for local populations and wildlife. New data on Hg levels in Barents rivers show strong seasonal variations and contribute to international efforts in reducing Hg pollution.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Birgit Wild, Nicholas E. Ray, Celine Lett, Amelia Jane Davies, Elena Kirillova, Henry Holmstrand, Elizaveta Klevantceva, Alexander Osadchiev, Ivan Gangnus, Evgeniy Yakushev, Denis Kosmach, Oleg Dudarev, Orjan Gustafsson, Igor Semiletov, Volker Bruchert
Summary: This study focuses on the data-poor Arctic Ocean shelves north of Siberia, which are experiencing rapid warming and increasing nitrogen input due to permafrost thaw. The research finds that nitrogen concentrations in water column and sediments are elevated near large river mouths. N2O concentrations are weakly correlated with dissolved nitrogen and turbidity, indicating the influence of particulate matter from rivers and coastal erosion. The study suggests that N2O dynamics in the region are influenced by water column N2O consumption and production.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Environmental Sciences
Lina Xie, Evgeniy Yakushev, Igor Semiletov, Andrey Grinko, Ivan Gangnus, Anfisa Berezina, Alexander Osadchiev, Igor Zhdanov, Alexander Polukhin, Julia Moiseeva, Darya Purgina, Irina Pipko, Svetlana Pugach, Oleg Dudarev, Zhenming Ge
Summary: Based on data collected from annual transects conducted from 2015-2020, this study explores the impact of River Lena plume dispersion on the hydrophysical and biogeochemical structure of the southeastern Laptev Sea. The results indicate that the spreading patterns of the plume play a crucial role in regulating local processes and show significant variation on both seasonal and interannual scales.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geochemistry & Geophysics
Duc Huy Dang, Quang Khai Ha, Julien Nemery, Emilie Strady
Summary: The study investigates the seasonal variations in dissolved concentrations of rare earth elements (REEs) in two rivers in Southern Vietnam and finds significant mobility of REEs during the wet season due to watershed runoff. The dissolved REE concentrations in the dry season are significantly lower but interact more with organic-rich particles. Further observations include the fractionation between light and heavy REEs and the anomalies of Eu in the dry season.
Article
Environmental Sciences
Anfisa Berezina, Svetlana Pakhomova, Igor Zhdanov, Olga Mekhova, Tatiana Polivanova, Matvei Novikov, Maria Pogojeva, Alexander Osadchiev, Natalia Stepanova, Evgeniy Yakushev
Summary: Despite ongoing research, the Arctic Ocean remains underexplored in terms of microplastics pollution. This study conducted an extensive survey in the Kara Sea and found relatively low abundance of microplastics. The study also revealed that rivers are not the main contributors to microplastic pollution in the Kara Sea, and highlighted the potential for microplastic accumulation due to complex interactions between North Atlantic waters and the Ob-Yenisey river plume.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Thi Thuy Duong, Duong Nguyen-Thuy, Ngoc Nam Phuong, Ha My Ngo, Thi Oanh Doan, Thi Phuong Quynh Le, Ha Manh Bui, Huong Nguyen-Van, Thai Nguyen-Dinh, Thi Anh Nguyet Nguyen, Thi Thanh Nga Cao, Thi Minh Hanh Pham, Thu-Huong Thi Hoang, Johnny Gasperi, Emilie Strady
Summary: This study investigated the occurrence and distribution of microplastics (MP) in riverine sediments in the Red River Delta, Vietnam. The results showed that the sediments contained predominantly polypropylene (PP) and polyethylene (PE) fibers, with decreasing fiber length and increasing fragment area from upstream to downstream. The concentration of organic matter was positively correlated with MP concentrations, indicating that areas with high organic matter levels may act as hotspots for microplastics in urban rivers. Additionally, higher population density and residential areas were associated with higher MP concentrations in sediments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Correction
Environmental Sciences
Evgeniy Yakushev, Anna Gebruk, Alexander Osadchiev, Svetlana Pakhomova, Amy Lusher, Anfisa Berezina, Bert van Bavel, Elena Vorozheikina, Denis Chernykh, Glafira Kolbasova, Ilia Razgon, Igor Semiletov
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Maria Pogojeva, Alexander Polukhin, Petr Makkaveev, Andre Staalstrom, Anfisa Berezina, Evgeniy Yakushev
Summary: The study assessed the current biogeochemical regime of Templefjord, showing the significant impact of coastal runoff and melted glacier water on the carbonate system and nutrient regime. The results can be extrapolated to other Arctic fjord systems.
