Results 31 to 40 of about 793,586 (304)

Tuning electronic structure of the carbon skeleton to accelerate electron transfer for promoting the capture of gold

open access: yesEnvironment International, 2023
The efficient and selective recovery of gold from secondary sources is key to sustainable development. However, the complexity of the recovery environment can significantly complicate the compositions of utilized sorbents. Here, we report a straw-derived
Dewei Li   +10 more
doaj   +1 more source

The Failure of Agency-Forcing: The Regulation of Airborne Carcinogens Under Section 112 of the Clean Air Act [PDF]

open access: yes, 1985
Professor Graham analyzes section 112 of the Clean Air Act, a provision intended by Congress to achieve ambitious regulatory ends by constraining agency discretion.
Graham, John D.
core   +2 more sources

Quantitative Microbial Risk Assessment of Urban Wastewater Pertaining to Irrigation of Agricultural Products in Qom, Iran, in 2020

open access: yesJournal of Environmental Health and Sustainable Development, 2023
Introduction: The present study aims to evaluate adverse health effects caused by the use of wastewater for the irrigation of fields in Qom province, Iran.
Ahmad Reza Yari   +2 more
doaj  

Oxidative 1,2-carboamination of alkenes with alkyl nitriles and amines toward γ-amino alkyl nitriles

open access: yesNature Communications, 2017
Difunctionalization of readily available alkenes is a powerful method to quickly build molecular complexity. Here the authors report a three-component, oxidative carboamination between alkenes, alkyl nitriles and amines, producingγ-amino alkyl nitriles.
Yan-Yun Liu   +4 more
doaj   +1 more source

Morphology Adjustment and Optimization of CuS as Enzyme Mimics for the High Efficient Colorimetric Determination of Cr(VI) in Water

open access: yesNanomaterials, 2022
Metal sulfide is often utilized as a catalyzed material to form colorimetric response system for some heavy metal detection. While the aggregation effect and conventional morphology limited the catalyzed efficiency.
Xinman Tu   +3 more
doaj   +1 more source

Spectral pollution

open access: yesIMA Journal of Numerical Analysis, 2004
We discuss the problems arising when computing eigenvalues of self-adjoint operators which lie in a gap between two parts of the essential spectrum. Spectral pollution, i.e. the apparent existence of eigenvalues in numerical computations, when no such eigenvalues actually exist, is commonplace in problems arising in applied mathematics.
Davies, E B, Plum, M
openaire   +3 more sources

Marine Pollution [PDF]

open access: yesScience, 1971
In the editorial, "Marine pollution" (8 January 1971, page 21), the value given for the concentration of mercury found in tuna (paragraph 2, line 10, 0.5 x 10-6 part per billion) is incorrect. The correct value is 500 parts per billion.
openaire   +3 more sources

Non-parametric regression analysis of diuron and gabapentin degradation in Lake Constance water by ozonation and their toxicity assessment [PDF]

open access: yes, 2019
Ozone possesses high selectivity in the oxidation of organic pollutants. It actively reacts with electron donating participants which contain π bonds and non-protonated amines groups.
Goswami, Anuradha   +2 more
core   +1 more source

Enhancing the Mn-Removal Efficiency of Acid-Mine Bacterial Consortium: Performance Optimization and Mechanism Study

open access: yesMicroorganisms, 2023
In this study, an acclimated manganese-oxidizing bacteria (MnOB) consortium, QBS-1, was enriched in an acid mine area; then, it was used to eliminate Mn(Ⅱ) in different types of wastewater.
Dongmei Hou   +4 more
doaj   +1 more source

Polluting Politics [PDF]

open access: yesSSRN Electronic Journal, 2015
This paper estimates the causal impact of party affiliation (Republican or Democrat) of U.S. governors on pollution. Using a regression discontinuity design, gubernatorial election data, and air quality data from U.S. Environmental Protection Agency (EPA), we find that pollution is lower under Democratic governors.
Louis-Philippe Beland, Vincent Boucher
openaire   +2 more sources

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