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Analysis of PM10 and PM2.5 Concentrations in an Urban Atmosphere in Northern Spain
Springer Science and Business Media LLC - Tập 76 - Trang 331-345 - 2018
This work analyses levels of particles PM10 and PM2.5 recorded at four air-quality monitoring stations located in the urban area of Valladolid (Spain) during 2015–2016. To achieve this, the evolution of particle concentrations at different time scales was determined. Average concentrations ranged from 15.3 to 17.6 µg m−3 for PM10 and between 8.9 and 14.8 µg m−3 for PM2.5. The highest monthly means...... hiện toàn bộ
Rapid SPME/LC/MS/MS Analysis of N-Methylcarbamate Pesticides in Water
Springer Science and Business Media LLC - Tập 35 - Trang 1-7 - 1998
Solid-phase microextraction combined with fast short-column liquid chromatography/electrospray ionization tandem mass spectrometry (SPME/LC/MS/MS) was used for isolating and analyzing nine N-methylcarbamate pesticides from water samples. Several SPME parameters, such as polarity of fibers, extraction time, and effect of ionic strength, were investigated and their impact on the SPME/LC/MS/MS tech...... hiện toàn bộ
Molluscicidal and Anti-AChE Activity of Tertiary Mixtures of Pesticides
Springer Science and Business Media LLC - Tập 34 - Trang 271-274 - 1998
We studied the toxicity and in vivo inhibition of acetylcholinesterase (AChE) by the organophosphate Nuvan (dichlorvos); Nuvan mixed with a mixed function oxidase inhibitor, piperonyl butoxide (PB); Nuvan with a pyrethroid Decis (deltamethrin); and a tertiary mixture of Nuvan, PB, and Decis in the snail Lymnaea acuminata. Nuvan was highly toxic to the snail and was a strong inhibitor of AChE act...... hiện toàn bộ
Polychlorinated biphenyls and organochlorine pesticides in milk of Norwegian women during lactation
Springer Science and Business Media LLC - Tập 19 - Trang 640-645 - 1990
Milk samples of 14 women were analyzed for PCBs (polychlorinated biphenyls),p,p′-DDE, and HCB (hexachlorobenzene) during 11 intervals of a 120 day-lactation period. A general downward trend in residue levels was evident, and a statistically significant decline was observed for residue levels of PCBs (P<0.01) and HCB (P=0.02) on the milk fat basis. Primipara (n=9) had from 1.5 to 2.1 times higher m...... hiện toàn bộ
Effects of Mining-Derived Metals on Riffle-Dwelling Crayfish in Southwestern Missouri and Southeastern Kansas, USA
Springer Science and Business Media LLC - Tập 63 - Trang 563-573 - 2012
Riffle-dwelling crayfish populations were sampled at 16 sites in 4 tributaries of the Spring River located within the Tri-State Mining District in southwest Missouri. Crayfish density, physical habitat quality, and water quality were examined at each site to assess the ecological effects of mining-derived metals on crayfish. Metals (lead, zinc, and cadmium) were analyzed in samples of surface wate...... hiện toàn bộ
Induction of rat liver drug-metabolizing enzymes by tetrachloroethylene
Springer Science and Business Media LLC - - 1995
Hg and Se in Muscle and Liver of Blue Shark (Prionace glauca) from the Entrance of the Gulf of California: An Insight to the Potential Risk to Human Health
Springer Science and Business Media LLC - - 2024
The blue shark (Prionace glauca) is the most commonly caught species of Elasmobranchii at the entrance to the Gulf of California. Although fins are the primary target commodity, the entire organism is consumed. This study examined the concentration of Hg and Se in muscle and liver to understand the antagonistic process that occurs between these two elements within the organism. Twenty-two individu...... hiện toàn bộ
Ecological significance of behavioral and hormonal abnormalities in breeding ring doves fed an organochlorine chemical mixture
Springer Science and Business Media LLC - Tập 12 - Trang 343-353 - 1983
Ring Doves (Streptopelia risoria) with breeding experience were fed a control diet or one of two dosages of a mixture of DDE, PCBs, mirex, and photomirex throughout an isolation period of 90 days and one reproductive cycle. Daily observations were made of courtship and parental behaviors. Circulating levels of androgens, estrogens, progesterone, thyroxine, and prolactin were measured in the approp...... hiện toàn bộ
Toxicological assessment of biodegraded pentachlorophenol: Microtox� and fish embryos
Springer Science and Business Media LLC - Tập 24 Số 2 - Trang 165-172 - 1993
An investigation of the safety of cotton reentry after organophosphate application
Springer Science and Business Media LLC - Tập 3 - Trang 344-351 - 1975
Twelve cotton insect scouts were monitored during an entire pesticide application season by weekly determinations ofpara-nitrophenol excretion and biweekly cholinesterase measurements. These data were compared to weekly reentry intervals and pesticide application rates to study the validity of a 48-hr minimum reentry interval for methyl parathion-treated cotton. Methyl parathion represented 54.2% ...... hiện toàn bộ
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