Results 31 to 40 of about 73,680 (311)

C1-C8 volatile organic compounds in the atmosphere of Hong Kong: Overview of atmospheric processing and source apportionment [PDF]

, 2007
We present measurements of C1-C8 volatile organic compounds (VOCs) at four sites ranging from urban to rural areas in Hong Kong from September 2002 to August 2003. A total of 248 ambient VOC samples were collected.
Barletta, B, Blake, DR, Guo, H, Meinardi, S, Simpson, IJ, So, KL   +5 more
core   +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

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

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

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

An extended Bayesian sediment fingerprinting mixing model for the full Bayes treatment of geochemical uncertainties [PDF]

, 2017
Recent advances in sediment fingerprinting research have seen Bayesian mixing models being increasingly employed as an effective method to coherently translate component uncertainties into source apportionment results.
Abban, Alewell, Belmont, Blake, Clarke, Collins, Collins, Collins, Cooper, Cooper, Cooper, Cooper, D'Haen, Egozcue, Fox, Gelfand, Guzmán, Haddadchi, Hoffman, Hopkins, Koiter, Koiter, Kraushaar, Krueger, Laceby, Laceby, Lamba, Martínez-Carreras, Massoudieh, Nosrati, Palazón, Parnell, Pulley, Pulley, Reiffarth, Rowan, Sherriff, Small, Smith, Smith, Stewart, Vale, Van den Meersche, Walling, Walling, Walling, Ward   +46 more
core   +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

Higher Amyloid and Tau Burden Is Associated With Faster Decline on a Digital Cognitive Test

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective A 2‐min digital clock‐drawing test (DCTclock) captures more granular features of the clock‐drawing process than the pencil‐and‐paper clock‐drawing test, revealing more subtle deficits at the preclinical stage of Alzheimer's disease (AD). A previous cross‐sectional study demonstrated that worse DCTclock performance was associated with
Jessie Fanglu Fu, Talia Robinson, Marina Rodriguez Alonso, Adela Francis Malave, Roos J. Jutten, Michael J. Properzi, Brian C. Healy, Jackson C. Thompson, Grace Del Carmen Montenegro, Emma Thibault, Dana Penney, Randall Davis, Reisa A. Sperling, Kathryn V. Papp, Keith A. Johnson, Julie C. Price, Dorene M. Rentz   +16 more
wiley   +1 more source

PM2.5 Source apportionment and health effects in urban districts of Hanoi: inter-comparison of source apportionment results

, 2023
Abstract Comparison results obtained by different models with different physical assumptions and constraints for source apportionment is important for better understanding the sources of the pollutants. Source apportionment of PM2.5 measured at three sites located in inner urban districts of Hanoi was performed using two receptor models, UNMIX ...
Thi Hieu Bui, Thi Phương Mai Nguyen
openaire   +1 more source