Results 41 to 50 of about 73,958 (307)

Direct mass spectrometry analysis of biological tissue for diagnosis of thyroid cancer using wooden-tip electrospray ionization

Frontiers in Chemistry, 2023
Direct mass spectrometry (MS) analysis of human tissue at the molecular level could gain insight into biomarker discovery and disease diagnosis. Detecting metabolite profiles of tissue sample play an important role in understanding the pathological ...
Dasheng Liu, Yuejian Shen, Dandan Di, Dandan Di, Shenhui Cai, Xueyang Huang, Hongguo Lin, Yalan Huang, Jing Xue, Li Liu, Bin Hu   +10 more
doaj   +1 more source

Apportionment of primary and secondary organic aerosols in Southern California during the 2005 Study of Organic Aerosols in Riverside (SOAR-1) [PDF]

, 2008
Ambient sampling was conducted in Riverside, California during the 2005 Study of Organic Aerosols in Riverside to characterize the composition and sources of organic aerosol using a variety of state-of-the-art instrumentation and source apportionment ...
DeCarlo, Peter F., Docherty, Kenneth S., Eatough, Delbert J., Grover, Brett D., Jimenez, Jose L., Murphy, Shane M., Peltier, Richard E., Schauer, James J., Seinfeld, John H., Snyder, David C., Stone, Elizabeth A., Ulbrich, Ingrid M., Weber, Rodney J.   +12 more
core   +2 more sources

Vehicular influence on atmospheric concentrations and source apportionment of polycyclic aromatic hydrocarbons in some major cities in three regions of Ghana using epiphytic lichens

Toxicology Reports, 2022
The present study employed epiphytic lichens as biomonitor and passive air sampler for the assessment of fifteen (15) atmospheric polycyclic aromatic hydrocarbons (PAHs) in some major cities in three regions of Ghana.
Nathaniel Thompson, Joseph Kweku Adjei, John Kwesi Bentum, David Kofi Essumang, Godfred Odame Duodu, George Hadzi, George Alimo Adjei   +6 more
doaj   +1 more source

Incorporating bioaccessibility and source apportionment into human health risk assessment of heavy metals in urban dust of Xiamen, China

Ecotoxicology and Environmental Safety, 2021
Heavy metals in urban dust could pose noticeable human health risks, but there are few studies focusing on comprehensive human health risk assessment with the incorporation of both bioaccessibility and source apportionment in urban dust.
Jin-jin Ma, Yu Yan, Xue-juan Chen, Zi-ru Niu, Rui-lian Yu, Gong-ren Hu   +5 more
doaj   +1 more source

Source Apportionment of Atmospheric Trace Element Deposition

Environmental Engineering Science, 2008
Samples of lichen species (Xanthoria parietina) collected from Aegean Region of Turkey were analyzed by instrumental neutron activation analysis to determine the concentrations of 31 elements. The elements (Au, Rb, Zn, Hg, Sb, Cd, As, Cl, Br, and Se) showed enrichment with respect to the crustal composition.
Yenisoy-Karakas, Serpil, Tuncel, Semra G.   +1 more
openaire   +2 more sources

Atmospheric CO₂ dynamics in a coastal megacity: spatiotemporal patterns, sea–land breeze impacts, and anthropogenic–biogenic emission partitioning [PDF]

Atmospheric Chemistry and Physics
Attributing observed carbon dioxide (CO2) to fossil-fuel emissions versus biogenic fluxes is essential for assessing urban mitigation, but in coastal megacities it is complicated by anthropogenic–biogenic coupling and sea–land breeze (SLB) circulation ...
J. Zhang, Y. Liang, C. Pei, B. Huang, Y. Huang, X. Lian, X. Lian, S. Song, C. Cheng, C. Wu, Z. Zhou, J. Li, M. Li   +12 more
doaj   +1 more source

The Disappearing State Corporate Income Tax [PDF]

, 2004
This paper examines alternative explanations for the decline over the past two decades in state corporate income taxes relative to the state economy. We employ a survey of state tax administrators, individual tax returns from Georgia and Utah, and panel ...
David L. Sjoquist, Gary Cornia, Kelly D. Edmiston, Sally Wallace   +3 more
core   +1 more source

Source apportionment with one source unknown

Chemometrics and Intelligent Laboratory Systems, 1991
Abstract Attribution of local pollution to area sources is essential to effective management of the environment. Source apportionment addresses the problem by statistical inference of source contributions to total pollution from observations of ambient air chemical composition.
Karen Bandeen-Roche, David Ruppert
openaire   +1 more source

Field comparison of dual- and single-spot Aethalometers: equivalent black carbon, light absorption, Ångström exponent and secondary brown carbon estimations [PDF]

Atmospheric Measurement Techniques
The Aethalometer is a widely used instrument for black carbon (BC) mass concentration and light absorption coefficient (babs) measurements around the world. However, field intercomparison of the two popular models, dual-spot (AE33) and single-spot (AE31)
L. Wu, L. Wu, L. Wu, C. Wu, C. Wu, C. Wu, T. Deng, D. Wu, D. Wu, D. Wu, M. Li, M. Li, M. Li, Y. J. Li, Y. J. Li, Z. Zhou, Z. Zhou, Z. Zhou   +17 more
doaj   +1 more source

Two‐Decadal Variability of Lacustrine Groundwater Discharge: Coupled Controls From Weather and Hydrologic Changes

Water Resources Research
Lacustrine groundwater discharge (LGD) is a vital water and solute source for lakes. However, the understanding of the long‐term temporal variability of LGD remains limited owing to insufficient insights into driving mechanisms, such as climatic and ...
Xiaoliang Sun, Yao Du, Jing Wu, Jiawen Xu, Hao Tian, Yamin Deng, Yiqun Gan, Yanxin Wang   +7 more
doaj   +1 more source