Article
Chemistry, Inorganic & Nuclear
Jiangpeng Dong, Tao Bai, Yihua Dai, Xiangbo Zhang, Jinlong Fan, Yaowen Hu, Xiaojing Song, Yan Ma, Liangliang Miao, Quanlin Shi, Zhiming Li
Summary: In this study, the half-life of 111Ag was determined to be 7.437(7) days, which is consistent with recent findings.
APPLIED RADIATION AND ISOTOPES
(2023)
Article
Multidisciplinary Sciences
Gadde Srinivasa Rao, Peter Josephat Kirigiti
Summary: This work investigates a time truncated sampling scheme based on indeterminacy for cancer patients. The study reveals that the indeterminacy parameter plays a crucial role in the average sample number of the scheme, and a comparative analysis with existing schemes indicates that the proposed scheme requires a smaller sample size.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Environmental
Yike Shen, Ercheng Zhao, Wei Zhang, Andrea A. Baccarelli, Feng Gao
Summary: Pesticide dissipation half-life in plants is crucial for assessing environmental fate of pesticides and establishing good agriculture practices. This study utilized machine learning models to predict the dissipation half-life and proposed novel intervals to account for variations in empirical data. The best-performing model, GBRT-ECFP, showed the potential of machine learning in evaluating pesticide fate in agricultural crops.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Jiangpeng Dong, Tao Bai, Yaowen Hu, Xiangbo Zhang, Jinlong Fan, Yihua Dai, Liangliang Miao, Xiaoren Yu, Zhiming Li
Summary: In this study, 161Tb samples were produced by irradiating 160Gd2O3 with thermal neutron flux, and a series of procedures were applied to extract a pure 161Tb solution and prepare three solid samples. The half-life of 161Tb was measured using a high-purity germanium (HPGe) detector. The time-dependency of the 161Tb activity was monitored by assessing the count rate of its characteristic gamma-ray emissions at 48.9 keV and 74.6 keV over a period of 33-43 days. Different uncertainty propagation equations were used to handle random uncertainties, medium-frequency deviations, and potential systematic errors. The determined half-life of 161Tb was 6.967 (11) d, which is longer than the current evaluated half-life of 6.89 (2) d.
APPLIED RADIATION AND ISOTOPES
(2023)
Article
Engineering, Mechanical
Jia Huang, Hongsheng Yang, Wencheng Liu, Kai Zhang, Aijun Huang
Summary: This study proposes a new methodology to evaluate the fatigue life of CFRP laminates, considering both confidence level and reliability. It combines fracture fatigue entropy (FFE) theory and knowledge of statistics. The study finds that FFEs follow a log-normal distribution, and there is no significant difference in the average values and deviations of logarithmic FFEs under different stress levels. The predicted gamma-p-S-N curves are more conservative and have larger scatter compared to experimental results.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Multidisciplinary Sciences
Andras Grabarits, Marton Kormos, Izabella Lovas, Gergely Zarand
Summary: This study presents a universal theory of quantum work statistics in generic chaotic Fermi systems, captured by random matrix theory. The work statistics is found to be non-Gaussian and characterized by a few dimensionless parameters. Furthermore, at longer times, the quantum work distribution can be described by a classical model, with accurate analytical expressions provided by bosonization and mean field methods.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Analytical
Quinn R. Shollenberger, Kelly N. Kmak, Corliss K. Sio, John D. Despotopulos, Geon-Bo Kim, Lars E. Borg
Summary: This study describes the chemical purification procedures for separating and purifying Sm-146, and presents the results obtained through gamma spectroscopy. The quantity of Sm-146 atoms can be accurately determined using a modified isotope dilution technique. Alpha-decay counting of the sample will be used in the future to determine the half-life of Sm-146.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
M. Teresa Duran, Frederic Juget, Youcef Nedjadi, Claude Bailat, Pascal Grundler, Zeynep Talip, Nicholas P. van der Meulen, Pierluigi Casolaro, Gaia Dellepiane, Saverio Braccini
Summary: The half-lives of 44Sc and 44mSc were measured using various measurement systems, and their values were found to be 4.042(7) h and 58.7(3) h, respectively. These results confirm the deviation from the recommended values and provide valuable information for the production and use of these isotopes.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Mathematics
Karol Santoro, Hector J. Gomez, Diego Gallardo, Inmaculada Barranco-Chamorro, Hector W. Gomez
Summary: A new class of densities for modelling non-negative data is introduced, which is based on the skew-symmetric family of distributions proposed by Azzalini. The study focuses on the model generated by the skew-normal distribution, called the Extended Half Skew-Normal distribution, and examines its relevant properties. The parameters are estimated using moment and maximum likelihood methods, and the performance of the maximum likelihood estimators is evaluated through simulation studies. Two real applications are included, demonstrating that the EHSN provides a better fit compared to other methods in the literature.
Article
Environmental Sciences
Jordan M. Couture, Zachary C. Redman, Jake Bozzini, Robert Massengill, Kristine Dunker, Brandon R. Briggs, Patrick L. Tomco
Summary: In the field, rotenone degraded within <60 days in all lakes, while the primary degradation product, rotenolone, persisted for up to <280 days at two locations. Laboratory simulation indicated that photolysis is the dominant process driving rotenone degradation under Southcentral Alaskan winter conditions.
Article
Physics, Nuclear
Changlin Lan, Yuting Wei, Jiahao Wang, Xianlin Yang, Gong Jiang, Yujie Ge, Chao Xu, Li Feng, Xiaojun Li
Summary: The isomeric ratio and half-life of Re-184 were measured and the uncertainty was discussed. The results are consistent with previous data and can be used to determine parameters characterizing the level density. The study also found that the half-life of the ground state can be obtained by eliminating contamination from gamma-rays emitted by the isomer.
Article
Multidisciplinary Sciences
Rolando de la Cruz, Hugo S. Salinas, Cristian Meza
Summary: This paper proposes a novel estimation procedure for stress-strength reliability, suitable for two independent unit-half-normal distributions with asymmetrical data and different shape parameters. The performance of the estimators is evaluated through Monte Carlo simulations and other metrics, and the proposed model is applied to data analysis of burr measurements on iron sheets.
Article
Environmental Sciences
Imtiaz Faruk Chowdhury, Maheswaran Rohan, Benjamin J. Stodart, Chengrong Chen, Hanwen Wu, Gregory S. Doran
Summary: The dissipation kinetics of atrazine and trifluralin in clay loam soil were investigated under different temperature and moisture conditions. Temperature had a greater impact on atrazine persistence, while the interaction of temperature and moisture was significant for trifluralin over time. Both herbicides tended to double their half-life with every 10 degrees C decrease in temperature, indicating the potential for years of persistence in soil conditions <= 20 degrees C.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Chemical
Haibin Wu, Anand Jagota, Chung-Yuen Hui
Summary: In this study, we investigate the lubricated sliding of a rigid cylinder on a viscoelastic half space with a single characteristic retardation time using a numerical scheme. Our results show that the total friction force can be decomposed into viscoelastic and hydrodynamic components. We find that the viscoelastic component can be well approximated by the dry limit, while the hydrodynamic component can be approximated by a modification of the elastic limit. We also examine the effects of parameters on the hydrodynamic pressure, film thickness, and friction coefficient.
Article
Mathematics
Leonardo Barrios, Yolanda M. Gomez, Osvaldo Venegas, Inmaculada Barranco-Chamorro, Hector W. Gomez
Summary: In this paper, an extension of the power half-normal distribution is proposed, which is built on the application of slash methodology for positive random variables. The new model exhibits greater kurtosis and a heavier right tail compared to the conventional power half-normal distribution. The probability density, survival and hazard rate functions are studied, and its moments, skewness, kurtosis coefficients, and properties related to reliability are obtained. It is proven that the new model can be expressed as a scale mixture of a power half-normal distribution and a uniform distribution. The new model also holds the power half-normal distribution as a limit case when its parameter tends to infinity. The parameters in the model are estimated using the method of moments and maximum likelihood. A simulation study is conducted to demonstrate the good performance of maximum likelihood estimators. Additionally, two real applications to survival and fatigue fracture data are presented, where the proposed model outperforms other models.
Article
Environmental Sciences
Toshimi Nakajima, Mao Kuragano, Makoto Yamada, Ryo Sugimoto
Summary: This study compared the contribution of submarine groundwater discharge (SGD) to river nutrient budgets at nearshore and embayment scales, and found that SGD-derived nutrients become more important at larger spatial scales.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Fan Liu, Lei Zhang, Chongyang Zhang, Ziguang Chen, Jingguang Li
Summary: NO2 emissions from wall-mounted gas stoves used for household heating have become a significant source of indoor pollution in Chinese urban areas. The high indoor concentration of NO2 poses potential health risks to residents. It is urgently necessary to establish relevant regulations and implement emission reduction technologies to reduce NO2 emissions from wall-mounted gas stoves.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Letter
Environmental Sciences
Hans Peter H. Arp, Raoul Wolf, Sarah E. Hale, Sivani Baskaran, Juliane Gluege, Martin Scheringer, Xenia Trier, Ian T. Cousins, Harrie Timmer, Roberta Hofman-Caris, Anna Lennquist, Andre D. Bannink, Gerard J. Stroomberg, Rosa M. A. Sjerps, Rosa Montes, Rosario Rodil, Jose Benito Quintana, Daniel Zahn, Herve Gallard, Tobias Mohr, Ivo Schliebner, Michael Neumann
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Philomina Onyedikachi Peter, Binessi Edouard Ifon, Francois Nkinahamira, Kayode Hassan Lasisi, Jiangwei Li, Anyi Hu, Chang-Ping Yu
Summary: This study investigates the relationship between dissolved organic matter (DOM) and Rare Earth Elements (REEs) in sediments from Yundang Lagoon, China. The results show four distinct fluorescent components, with protein-like substances being the most prevalent. Additionally, the total fluorescence intensity and LREE concentrations exhibit a synchronized increase from Outer to Inner to Songbai Lake core sediments. The findings demonstrate a strong correlation between DOM content and pollution levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Surya Gupta, Pasquale Borrelli, Panos Panagos, Christine Alewell
Summary: The objective of this study is to incorporate soil hydraulic properties into the erodibility factor (K) of USLE-type models. By modifying and improving the existing equations for soil texture and permeability, the study successfully included information on saturated hydraulic conductivity (Ksat) into the calculation of K factor. Using the Random Forest machine learning algorithm, two independent K factor maps with different spatial resolutions were generated. The results show that the decrease in K factor values has a positive impact on the modeling of soil erosion rates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jesmin Akter, Wendy J. M. Smith, Yawen Liu, Ilho Kim, Stuart L. Simpson, Phong Thai, Asja Korajkic, Warish Ahmed
Summary: The choice of workflow in wastewater surveillance has a significant impact on SARS-CoV-2 concentrations, while having minimal effects on HF183 and no effect on HAdV 40/41 concentrations. Certain components in the workflow can be interchangeable, but factors such as buffer type, chloroform, and homogenization speed can affect the recovery of viruses and bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yu Luo, Xueting Yang, Diwei Wang, Hongmei Xu, Hongai Zhang, Shasha Huang, Qiyuan Wang, Ningning Zhang, Junji Cao, Zhenxing Shen
Summary: Atmospheric PM2.5, which can generate reactive oxygen species (ROS), is associated with cardiorespiratory morbidity and mortality. The study found that both the mass concentration of PM2.5 and the DTT activity were higher during the heating season than during the nonheating season. Combustion sources were the primary contributors to DTT activity during the heating season, while secondary formation dominated during the nonheating season. The study also revealed that biomass burning had the highest inherent oxidation potential among all sources investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Erin L. Murphy, Leah R. Gerber, Chelsea M. Rochman, Beth Polidoro
Summary: Plastic pollution has devastating consequences for marine organisms. This study uses a trait-based framework to develop a vulnerability index for marine mammals, seabirds, and sea turtles in Hawai'i. The index ranks 63 study species based on their vulnerability to macroplastic pollution, providing valuable information for species monitoring and management priorities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Kenji Maurice, Amelia Bourceret, Sami Youssef, Stephane Boivin, Liam Laurent-Webb, Coraline Damasio, Hassan Boukcim, Marc-Andre Selosse, Marc Ducousso
Summary: Growing pressure from climate change and agricultural land use is destabilizing soil microbial community interactions. Little is known about microbial community resistance and adaptation to disturbances, hindering our understanding of recovery latency and implications for ecosystem functioning. This study found that anthropic disturbance and natural disturbance have different effects on the topology and stability of soil microbial networks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yunhao Li, Yali Feng, Haoran Li, Yisong Yao, Chenglong Xu, Jinrong Ju, Ruiyu Ma, Haoyu Wang, Shiwei Jiang
Summary: Deep-sea mining poses a serious threat to marine ecosystems and human health by disturbing sediment and transmitting metal ions through the food chain. This study developed a new regenerative adsorption material, OMN@SA, which effectively removes metal ions. The adsorption mechanism and performance of the material for metal ion fixation were investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Antonio Medici, Margherita Lavorgna, Marina Isidori, Chiara Russo, Elena Orlo, Giovanni Luongo, Giovanni Di Fabio, Armando Zarrelli
Summary: Valsartan, a widely used antihypertensive drug, has been detected in high concentrations in surface waters due to its unchanged excretion and incomplete degradation in wastewater treatment plants. This study investigated the degradation of valsartan and identified 14 degradation byproducts. The acute and chronic toxicity of these byproducts were evaluated in key organisms in the freshwater trophic chain.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jiang Lin, Lianbao Chi, Qing Yuan, Busu Li, Mingbao Feng
Summary: This study investigated the photodegradation behavior and product formation of two representative pharmaceuticals in simulated estuary water. The study found that the formed transformation products of these pharmaceuticals have potential toxicity on marine organisms, including oxidative stress and damage to cellular components.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Hua Fang, Dongdong Jiang, Ye He, Siyi Wu, Yuehong Li, Ziqi Zhang, Haoting Chen, Zixin Zheng, Yan Sun, Wenxiang Wang
Summary: This study revealed that exposure to lower levels of air pollutants led to decreased pregnancy rates, with PM10, NO2, SO2, and CO emerging as the four most prominent pollutants. Individuals aged 35 and above exhibited heightened susceptibility to pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Ali Shaan Manzoor Ghumman, Rashid Shamsuddin, Amin Abbasi, Mohaira Ahmad, Yoshiaki Yoshida, Abdul Sami, Hamad Almohamadi
Summary: In this study, inverse vulcanized polysulfides (IVP) were synthesized by reacting molten sulfur with 4-vinyl benzyl chloride, and then functionalized using N-methyl D-glucamine (NMDG). The functionalized IVP showed a high mercury adsorption capacity and a machine learning model was developed to predict the amount of mercury removed. Furthermore, the functionalized IVP can be regenerated and reused, providing a sustainable and cost-effective adsorbent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Rita Bonfiglio, Renata Sisto, Stefano Casciardi, Valeria Palumbo, Maria Paola Scioli, Erica Giacobbi, Francesca Servadei, Gerry Melino, Alessandro Mauriello, Manuel Scimeca
Summary: This study investigated the presence of aluminum in human colon cancer samples and its potential association with biological processes involved in cancer progression. Aluminum was found in tumor areas of 24% of patients and was associated with epithelial to mesenchymal transition (EMT) and cell death. Additional analyses revealed higher tumor mutational burden and mutations in genes related to EMT and apoptosis in aluminum-positive colon cancers. Understanding the molecular mechanisms of aluminum toxicity may improve strategies for the management of colon cancer patients.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)