Search results for "Pollutant"
showing 10 items of 1389 documents
Liver energy metabolism of Anguilla anguilla after exposure to fenitrothion.
1998
This paper deals with the effect of fenitrothion (0.04 mg/liter) on the energy metabolism of the European eel, Anguilla anguilla, and its recovery from intoxication. Various parameters such as glycogen, lactate, proteins, total lipids, and glucose in eel liver and blood were analyzed after 2, 8, 12, 24, 32, 48, 56, 72, and 96 h of fenitrothion exposure. Subsequently, the fish were allowed recovery periods of 8, 12, 24, 48, 72, 96, 144, and 192 h in clean water, and the same parameters were evaluated. Liver glycogen and lipid contents decreased significantly during the exposure, while blood glucose levels increased markedly. Liver and blood lactate values increased during pesticide exposure,…
Correlation between short-term air pollution exposure and unprovoked lung embolism. Prospective observational (Contamina-TEP Group)
2020
Background The aim was to analyze the temporal relationship between short-term air pollution exposure and acute symptomatic unprovoked pulmonary embolism (PE). Patients/methods We performed a prospective, multicenter study in consecutive patients diagnosed with acute symptomatic unprovoked PE from February 2012 to January 2013. We analyzed demographic and clinical data, patients' addresses, meteorological and air pollutants data (PM10, SO2, CO, NO2, ozone emission data). We considered the number of days the patient had symptoms, and the study period constituted the previous 30 days. Likewise, the mean annual data of the reference season were calculated as well as the data of the 30-day stud…
The INMA INfancia y Medio Ambiente-(Environment and Childhood) project: More than 10 years contributing to environmental and neuropsychological resea…
2017
Background: In 2003 the INMA—INfancia y Medio Ambiente (Environment and Childhood) project, a Spanish national network of birth cohorts including more than 3500 participants, was set up with the aim to assess the health impacts of pre- and postnatal environmental exposures on children. The project has published more than 60 papers on maternal and environmental factors related to neuropsychological development in children, one of the main research interests within the project. With the present review, we evaluate the evidence provided by the INMA project on this topic and discuss how the data can contribute to cover the challenges that children’s environmental health research will face in th…
Influence of prenatal exposure to environmental pollutants on human cord blood levels of glutamate
2013
El pdf del artículo es la versión post-print.
Aryl hydrocarbon receptor-dependent cell cycle arrest in isolated mouse oval cells
2013
The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor, which mediates toxic responses to environmental pollutants, such as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and related compounds. Besides its well known role in induction of xenobiotic metabolizing enzymes, for instance CYP1A1, the AhR is also involved in tumor promotion in rodents although the underlying mechanisms are still poorly understood. Additionally, the AhR is known to regulate cellular proliferation, which might result in either inhibition or stimulation of proliferation depending on the cell-type studied. Potential targets in hepatocarcinogenesis are liver oval (stem/progenitor) cells. In the pres…
Assessing alcohol consumption through wastewater-based epidemiology: Spain as a case study
2020
Background In this study, an alternative and complementary method to those approaches currently used to estimate alcohol consumption by the population is described. This method, known as wastewater-based epidemiology (WBE), allows back-calculating the alcohol consumption rate in a given population from the concentrations of a selected biomarker measured in wastewater. Methods Composite (24-h) wastewater samples were collected at the inlet of 17 wastewater treatment plants located in 13 Spanish cities for seven consecutive days in 2018. The sampled area covered 12.8% of the Spanish population. Wastewater samples were analyzed to determine the concentration of ethyl sulfate, the biomarker use…
Wood-derived estrogens: studies in vitro with breast cancer cell lines and in vivo in trout.
1996
The wood-derived compound, beta-sitosterol (purity > 90%), was shown to be estrogenic in fish. It induced the expression of the vitellogenin gene in the liver of juvenile and methyltestosterone-treated rainbow trout. Structural similarities to beta-sitosterol notwithstanding, cholesterol, citrostadienol, beta-sitostanol, and 5-androstene-3 beta,17 beta-diol, an estrogenic member of the androstenic steroid group, were inactive. An abietic acid mixture (37% abietic acid, 6% dehydroabietic acid, and a remainder of unknown compounds) showed slight hormonal activity in feed, but it was completely inactive when given intraperitoneally in implants. The estrogenic component of the abietic acid prep…
Inorganic Mercury Sequestration by a Poly(ethylene imine) Dendrimer in Aqueous Solution
2015
The interaction of the G-2 poly(ethylene imine) dendrimer L, derived from ammonia as initiating core, with Hg(II) and HgCl4 2− was studied in aqueous solution by means of potentiometric (pH-metric) measurements. Speciation of these complex systems showed that L is able to form a wide variety of complexes including 1:1, 2:1, 3:1 and 3:2 metal-to-ligand species, of different protonation states, as well as the anion complexes ((H7L)HgCl4) 5+ and ((H8L)HgCl4) 6+ . The stability of the metal complexes is very high, making L an excellent sequestering agent for Hg(II), over a large pH range, and a promising ligand for the preparation of functionalized activated carbons to be employed in the remedi…
Transporta plūsmu kustības ātruma un strukturālo izmaiņu modelēšana Valdemāra ielas kanjona posmos
2015
Bakalaura darba ietvaros pētīta autotransporta radītā atmosfēras piesārņojuma izplatība Rīgā, Valdemāra ielas kanjonā. Kā indikators ietekmes novērtēšanai izmantotas slāpekļa dioksīda koncentrācijas, kuras cieši korelē ar transporta līdzekļu plūsmas intensitāti; bez tam regulāri tiek pārsniegti slāpekļa dioksīdam noteiktie stundas un gada normatīvi. Piesārņojuma izplatība novērtēta izmantojot matemātisko modelis OSPM, kurš speciāli izstrādāts transporta radītā piesārņojuma dispersijai un raksturošanai. Darbā aprakstīta transporta plūsmas dinamika dažādiem dienu profiliem un izveidota datu bāze modelēšanai, raksturota piesārņojuma problemātika ielu kanjonos, modelēšanas ceļā novērtēta apbūve…
Comparison of Exposure Techniques and Vitality Assessment of Mosses in Active Biomonitoring for Their Suitability in Assessing Heavy Metal Pollution …
2021
The most widespread and used technique is the moss-bag method in active biomonitoring of air pollution using mosses. In the literature, we can find various studies on the standardization of this method, including attempts to standardize treatments and preparation procedures for their universal application. Few works comprehensively focus on other methods or compare other techniques used in active biomonitoring with mosses, especially including measurements of their vital parameters. Our experiment aimed to assess air pollution by selected heavy metals (Cu, Zn, Cd, Pb, Mn, Fe, and Hg) using three moss species (Pleurozium schreberi, Sphagnum fallax, and Dicranum polysetum) during a 12-week ex…