Results 1 to 10 of about 73,680 (311)

Sensitivity of fluvial sediment source apportionment to mixing model assumptions: A Bayesian model comparison [PDF]

Water Resources Research, 2014
Mixing models have become increasingly common tools for apportioning fluvial sediment load to various sediment sources across catchments using a wide variety of Bayesian and frequentist modeling approaches.
Richard J. Cooper, Tobias Krueger, Kevin M. Hiscock, Barry G. Rawlins   +3 more
doaj   +2 more sources

Iodine source apportionment in the Malawian diet [PDF]

Scientific Reports, 2015
AbstractThe aim of this study was to characterise nutritional-I status in Malawi. Dietary-I intakes were assessed using new datasets of crop, fish, salt and water-I concentrations, while I status was assessed for 60 women living on each of calcareous and non-calcareous soils as defined by urinary iodine concentration (UIC).
Michael J. Watts, Edward J. M. Joy, Scott D. Young, Martin R. Broadley, A. D. Chilimba, Rosalind S. Gibson, Edwin W. P. Siyame, Alexander Kalimbira, Ben Chilima, E. Louise Ander   +9 more
openaire   +6 more sources

Onsite Identification of Air Pollutants in Plastic Sports-Field Using Portable Gas ChromatographyMass Spectrometry via Drone-Based Solid-Phase Microextraction Sampling [PDF]

Zhipu Xuebao, 2023
Plastic sports-fields are commonly used in communities, schools and other public places nowadays, which can offer positive benefits to fitness and sports. Plastic sports-fields are usually made of petroleum-based materials. Under high-temperature weather,
MO Wen-zheng1, ZOU Ying-tong2, HUANG Qiao-yun1, CHEN Wei-ni1, LI Si-jie2, LI Jia-jia2, QIAO Jia2, HU Bin1   +7 more
doaj   +1 more source

Long-Term Observation of Mixing States and Sources of Vanadium-Containing Single Particles from 2020 to 2021 in Guangzhou, China

Toxics, 2023
The distribution of vanadium (V) in aerosols is commonly used to track ship exhaust emissions, yet the atmospheric abundance of V has been greatly reduced due to the implementation of a clean fuel policy.
Xin Xiong, Zaihua Wang, Chunlei Cheng, Mei Li, Lijun Yun, Sulin Liu, Liyuan Mao, Zhen Zhou   +7 more
doaj   +1 more source

Amplification of black carbon light absorption induced by atmospheric aging: temporal variation at seasonal and diel scales in urban Guangzhou [PDF]

Atmospheric Chemistry and Physics, 2020
Black carbon (BC) aerosols have been widely recognized as a vital climate forcer in the atmosphere. Amplification of light absorption can occur due to coatings on BC during atmospheric aging, an effect that remains uncertain in accessing the radiative ...
J. Y. Sun, J. Y. Sun, C. Wu, C. Wu, D. Wu, D. Wu, D. Wu, C. Cheng, C. Cheng, M. Li, M. Li, L. Li, L. Li, T. Deng, J. Z. Yu, J. Z. Yu, J. Z. Yu, Y. J. Li, Q. Zhou, Q. Zhou, Y. Liang, Y. Liang, T. Sun, T. Sun, L. Song, L. Song, P. Cheng, P. Cheng, W. Yang, W. Yang, C. Pei, C. Pei, C. Pei, Y. Chen, Y. Cen, H. Nian, Z. Zhou, Z. Zhou   +37 more
doaj   +1 more source

Increase of the particle hit rate in a laser single-particle mass spectrometer by pulse delayed extraction technology [PDF]

Atmospheric Measurement Techniques, 2020
A single-particle mass spectrometer (SPMS) can provide a wealth of valuable information on chemical and physical parameters of individual particles in real time.
Y. Chen, Y. Chen, V. Kozlovskiy, X. Du, X. Du, J. Lv, S. Nikiforov, J. Yu, J. Yu, A. Kolosov, W. Gao, W. Gao, Z. Zhou, Z. Zhou, Z. Huang, Z. Huang, L. Li, L. Li   +17 more
doaj   +1 more source

Solid phase microextraction for human breath analysis of environmental and occupational exposures: A review

Advances in Sample Preparation, 2022
Human exhaled breath contains various molecules that relate to human health and environmental exposures. There has been increasing interest in human breath analysis for exposure monitoring.
Zi-Cheng Yuan, Ying Zhang, Shen-Hui Cai, Weini Chen, Bin Hu   +4 more
doaj   +1 more source

Budget of nitrous acid (HONO) at an urban site in the fall season of Guangzhou, China [PDF]

Atmospheric Chemistry and Physics, 2022
High concentrations of nitrous acid (HONO) have been observed in the Pearl River Delta (PRD) region of China in recent years, contributing to an elevated atmospheric oxidation capacity due to the production of OH through HONO photolysis.
Y. Yu, Y. Yu, P. Cheng, P. Cheng, P. Cheng, H. Li, H. Li, W. Yang, W. Yang, B. Han, B. Han, W. Song, W. Hu, X. Wang, B. Yuan, B. Yuan, M. Shao, M. Shao, Z. Huang, Z. Li, J. Zheng, J. Zheng, H. Wang, X. Yu, X. Yu   +24 more
doaj   +1 more source

Voltage Optimization of Multiple Reflection Time of Flight Mass Analyzer Based on Particle Swarm Optimization Algorithm [PDF]

Zhipu Xuebao, 2023
Time-of-flight mass spectrometry is a commonly mass spectrometry technique that is widely used in biomedicine, environmental science and food science. The multiple reflection time-of-flight (MR-TOF) mass analyzer is a new type of mass analyzer with ultra-
HUANG Qi;REN Yi;CHEN Zheng-ge;CHEN Jian-song;HONG Yi;LIANG Xin;LI Mei;HUANG Zheng-xu;ZHOU Zhen
doaj   +1 more source

Source apportionment resolved by time of day for improved deconvolution of primary source contributions to air pollution [PDF]

Atmospheric Measurement Techniques, 2022
Present methodologies for source apportionment assume fixed source profiles. Since meteorology and human activity patterns change seasonally and diurnally, application of source apportionment techniques to shorter rather than longer time periods ...
S. Bhandari, S. Bhandari, Z. Arub, G. Habib, J. S. Apte, J. S. Apte, L. Hildebrandt Ruiz   +6 more
doaj   +1 more source