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PubMed Journal Database | Environmental science & technology RSS

08:12 EDT 24th May 2019 | BioPortfolio

The US National Library of Medicine and National Institutes of Health manage PubMed.gov which comprises of more than 29 million records, papers, reports for biomedical literature, including MEDLINE, life science and medical journals, articles, reviews, reports and  books.

BioPortfolio aims to cross reference relevant information on published papers, clinical trials and news associated with selected topics - speciality.

For example view all recent relevant publications on Epigenetics and associated publications and clincial trials.

Showing PubMed Articles 1–25 of 2,100+ from Environmental science & technology

Efficient removal of ultrafine particles from diesel exhaust by selected tree species: implications for roadside planting for improving the quality of urban air.

Human exposure to airborne ultrafine (

Activation of Peroxymonosulfate by Oxygen Vacancies-enriched Cobalt-doped Black TiO Nanotubes for Removal of Organic Pollutants.

Cobalt-mediated activation of peroxymonosulfate (PMS) has been widely investigated for the oxidation of organic pollutants. Herein, we employ cobalt-doped Black TiO nanotubes (Co-Black TNT) for the efficient, stable, and reusable activator of PMS for the degradation of organic pollutants. Cobalt-doped Black TNTs induce the activation of PMS by itself and stabilized oxygen vacancies that enhance the bonding with PMS and provide catalytic active sties for PMS activation. A relatively high electronic conductiv...

Effects of Atmospheric Processing on the Oxidative Potential of Biomass Burning Organic Aerosols.

Oxidative potential (OP), which is the ability of certain components in atmospheric particles to generate reactive oxidative species (ROS) and deplete antioxidants in-vivo, is a prevailing toxicological mechanism underlying the adverse health effects associated with exposure to ambient aerosols. While previous studies have identified the high OP of fresh biomass burning organic aerosols (BBOA), it remains unclear how it evolves throughout atmospheric transport. Using the dithiothreitol (DTT) assay as a meas...

Combining in silico tools with multicriteria analysis for alternatives assessment of hazardous chemicals - a case study of decabromodiphenyl ether alternatives.

Alternatives assessment is applied for minimizing the risk of unintentionally replacing a hazardous chemical with another hazardous chemical and central challenges are the diversity of properties to consider and the lack of high-quality experimental data. To address this, a novel alternatives assessment procedure was developed based on in silico data and multicriteria decision analysis (MCDA) methods. As a case study, sixteen alternatives to the flame retardant decabromodiphenyl ether were considered. The h...

Enhanced Photoreduction of U(VI) on C3N4 by Cr(VI) and Bisphenol A: ESR, XPS and EXAFS Investigation.

The effect of Cr(VI) and bisphenol A (BPA) on U(VI) photoreduction by C3N4 photocatalyst was demonstrated by the batch experiments, electron spin resonance (ESR), X-ray photoelectron spectroscopy (XPS), X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) techniques. The batch experiments manifested that Cr(VI) and BPA enhanced the photocatalytic activity of C3N4 for U(VI) photoreduction, whereas U(VI) photoreduction was significantly diminished with increased pH...

Insights into Livestock-Related Microbial Concentrations in Air at Residential Level in a Livestock Dense Area.

Microbial air pollution from livestock farms has raised concerns regarding public health. Little is known about airborne livestock-related microbial levels in residential areas. We aimed to increase insights into this issue. Air measurements were performed in 2014 and 2015 at 61 residential sites in The Netherlands. Quantitative-PCR was used to assess DNA concentrations of selected bacteria (commensals: Escherichia coli and Staphylococcus spp.; a zoonotic pathogen: Campylobacter jejuni) and antimicrobial re...

Atmospheric Occurrence of Legacy Pesticides, Current Use Pesticides, and Flame Retardants in and around Protected Areas in Costa Rica and Uganda.

Protected areas have developed alongside intensive changes in land use and human settlements in the neighboring landscape. Here, we investigated the occurrence of 21 organochlorine pesticides (OCPs), 14 current use pesticides (CUPs), 47 halogenated flame retardants (HFRs), and 19 organophosphate esters (OPEs) in air around Las Cruces (LC) and La Selva (LS) Biological Stations, Costa Rica, and Kibale National Park (KNP), Uganda using passive air samplers (PAS) with polyurethane foam (PUF) discs (PAS-PUF). Si...

Human Indoor Exposome of Chemicals in Dust and Risk Prioritization Using EPA's ToxCast Database.

Humans spend most of their time indoors and thus have long-term exposure to chemicals. Dust is a sink for most indoor chemicals, and its ingestion is an important pathway for chemical uptake. Therefore, the chemical atlas from dust is an ideal environmental sample to investigate the indoor exposome and associated risk. In this study, we aimed to establish an indoor exposome database through comprehensive data mining on the occurrence of identified compounds in dust, and we prioritize chemicals of health con...

Co-transformation of Carbon Dots and Contaminant under Light in Aqueous Solutions: A Mechanistic Study.

In this study, the photochemistry of carbon dots (CDs) and their effects on pollutant transformation were systematically examined. Diethyl phthalate (DEP) degradation was strongly enhanced by CDs under UV light, with the observed reaction rate constant (kobs) increased by 2.4-15.1-fold by CDs at a concentration of 0.5-10 mg/L. Electron paramagnetic resonance (EPR) spectrometry combined with free radical quenching experiments with various chemical probes indicated the production of reactive oxygen species (R...

Variations, determinants, and co-exposure patterns of personal care product chemicals among Chinese pregnant women: a longitudinal study.

Exposure to mixtures of personal care product chemicals (PCPCs) is commonplace among the Chinese population; yet, limited data are available on the variations, determinants, and co-exposure patterns of PCPCs, particularly among pregnant women at multiple time points during gestation. Here, we measured concentrations of 11 most common PCPCs (five parabens, five benzophenones, and triclosan) in 2823 urine samples collected from 941 pregnant women over three trimesters. Based on the quantification results, we ...

Simultaneous and synergic production of bioavailable iron and reactive iodine species in ice.

The bioavailable iron is essential for all living organisms and the dissolution of iron oxide contained in dust and soil is one of the major sources of bioavailable iron in nature. Iodine in the polar atmosphere is related to ozone depletion, mercury oxidation, and cloud condensation nuclei formation. Here we show that the chemical reaction between iron oxides and iodide (I-) is markedly accelerated to produce bioavailable iron (Fe(II)aq) and tri-iodide (I3-: evaporable in the form of I2) in frozen solution...

New insights in the natural organic matter fouling mechanism of polyamide and nanocomposite multiwalled carbon nanotubes-polyamide membranes.

Polyamide (PA) membranes comprise most of the reverse osmosis membranes currently used for desalination and water purification. However, its fouling mechanism with natural organic matter (NOM) is still not completely understood. In this work, we studied three different types of PA membranes, a laboratory-made PA, a commercial PA and a multiwalled carbon nanotube (CNT) - PA nanocomposite membrane, during cross-flow measurements by NaCl solutions including NOM humic acid (HA) or alginate, respectively. Molecu...

Why does cysteine enhance metal uptake by phytoplankton in seawater but not in fresh water?

Low-molecular-weight weak ligands such as cysteine have been shown to enhance metal uptake by marine phytoplankton in the presence of strong ligands, but the effect is not observed in freshwater. We hypothesized that these contrasting results might be caused by local cysteine degradation and a Ca effect on metal-ligand exchange kinetics in the boundary layer surrounding the algal cells; newly liberated free metal ions cannot be immediately complexed in seawater by Ca-bound strong ligands, but can be rapidly...

Inherent Metals of Phytoremediation Plant Influences its Recyclability by Hydrothermal Liquefaction.

Plants used for phytoremediation of contaminated soil often enrich in certain metals present in the soil. However, the role of the inherent metal content of the plants on their recycling by hydrothermal liquefaction (HTL) has not been considered in previous studies. The present study showed that Rhus chinensis plants grown in highly Pb-polluted soil can release inherent metals (such as Pb, K, Ca, Na, and Mg) into the HTL solution, further enhancing the production of formic and acetic acids, and decreasing t...

Coupling high-performance thin-layer chromatography with bacterial genotoxicity bioreporters.

We present an innovative technological platform for monitoring the direct genotoxicity of individual components in complex environmental samples, based on bioluminescent Escherichia coli genotoxicity bioreporters, sprayed onto the surface of a high-performance thin-layer chromatography (HPTLC) plate. These sensor strains harbor plasmid-borne fusions of selected gene promoters of the E. coli SOS DNA repair system to the Photorhabdus luminescens luxABCDE gene cassette, and mark by increased luminescence the p...

New high-tech flexible networks for the monitoring of deep-sea ecosystems.

Increasing interest in the acquisition of biotic and abiotic resources from within the deep sea (e.g. fisheries, oil-gas extraction, and mining) urgently imposes the development of novel monitoring technologies, beyond the traditional vessel-assisted, time-consuming, high-cost sampling surveys. The implementation of permanent networks of seabed and water-column cabled (fixed) and docked mobile platforms is presently enforced, to cooperatively measure biological features and environmental (physico-chemical) ...

Mercury Uptake by Desulfovibrio desulfuricans ND132: Passive or Active?

Recent studies have identified HgcAB proteins as being responsible for mercury [Hg(II)] methylation by certain anaerobic microorganisms. However, it remains controversial whether microbes take up Hg(II) passively or actively. Here we examine the dynamics of concurrent Hg(II) adsorption, uptake, and methylation by both viable and inactivated cells (heat-killed or starved) or spheroplasts of the sulfate-reducing bacterium Desulfovibrio desulfuricans ND132 in laboratory incubations. We show that, without addit...

Economics of enhancing nutrient circularity in an organic waste valorization system.

Waste managers struggle to comply with the European legislation that regulates the handling of organic waste. A waste management system that aims at recovering nutrients from the municipal organic waste generated in the Spanish region of Cantabria was modeled combining Material Flow Analysis, Life Cycle Assessment and Life Cycle Costing. The model was optimized to find system configurations that minimize the total annual cost (TAC) and the global warming impacts (GW) and maximize the circularity indicators ...

Letter to the Editor: Optimism for Nontarget Analysis in Environmental Chemistry.

Tackling Deficiencies in the Presentation and Interpretation of Adsorption Results for New Materials.

Slow-release implants for manipulating contaminant exposures in aquatic wildlife - a new tool for field ecotoxicology.

Field-based ecotoxicology studies are invaluable for uncovering the effects of contaminants of emerging concern (CECs) on aquatic organisms. However, large-scale exposures are still very rare due to prohibitive costs, the availability of replicated habitats, and the potential for exposures to cause lasting damage to the environment. Here, we evaluated the viability of internal slow-release implants as an alternative method for manipulating CEC exposures in aquatic wildlife using two fat-based carriers (coco...

Gas-phase photoelectrocatalysis for breaking down nitric oxide.

Photoelectrocatalysis (PEC) always produces a high efficiency in electron-holes separation by applying a bias voltage between semiconductor-based electrodes for achieving high reaction rates of photocatalysis. However, it is difficult for PEC to be performed for treating polluted gas in a gas phase reaction because of the lack of conductive medium. Herein, we reported an efficient PEC system for oxidizing NO flow gas by using paralleled photoactive composites (TiO2 nanoribbons-carbon nanotubes) coated on st...

Occurrence and Profiles of Melamine and Cyanuric Acid in Bovine Feed and Urine from China, India, and the United States.

Melamine and cyanuric acid have been reported to occur in animal products. Nevertheless, information that pertains to the occurrence of melamine and cyanuric acid in cattle feed and urine is lacking. In this study, the occurrence of melamine and its three derivatives (i.e., cyanuric acid, ammeline, and ammelide) was determined in 183 bovine urine and 29 matched feed samples collected from China, India, and the United States. ∑Melamine (sum of four target compounds) was found in all urine samples at concen...

Combined effects of pH and borohydride reduction on the optical properties of humic substances (HS): A comparison of optical models.

The combined effects of pH and borohydride reduction on the optical properties of a series of humic substances and a lignin model was examined to probe the molecular moieties and interactions that give rise to the observed optical properties of these materials. Increasing the pH from 2 to 12 produced significantly enhanced absorption across the spectra of all samples, with distinct spectral responses observed over pH ranges attributable to the deprotonation of carboxylic acids and phenols. Borohydride reduc...

Photolytic transformation products of decabromodiphenyl ethane (DBDPE).

The photolytic transformation of decabromodiphenyl ethane (DBDPE) - a current-use brominated flame retardant (BFR) and major substitute of the structurally related decabromodiphenyl ether - was investigated in different solvents (toluene, dichloromethane, chlorobenzene and benzyl alcohol). The transformation rate followed pseudo first order kinetics, with increasing half-life (t1/2) in the order of toluene (t1/2 = 4.6 min), chlorobenzene (t1/2 = 14.0 min), dichloromethane (t1/2 = 27.9 min) and benzyl alcoho...


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