Results 21 to 30 of about 1,711 (184)

Simple Generation of Suspensible Secondary Microplastic Reference Particles via Ultrasound Treatment

open access: yesFrontiers in Chemistry, 2020
In the environment the weathering of plastic debris is one of the main sources of secondary microplastic (MP). It is distinct from primary MP, as it is not intentionally engineered, and presents a highly heterogeneous analyte composed of plastic ...
Elisabeth von der Esch   +8 more
doaj   +1 more source

A record of volcanic eruptions over the past 2,200 years from Vostok firn cores, central East Antarctica

open access: yesFrontiers in Earth Science, 2023
Introduction: The products of volcanic eruptions found in the snow, firn and ice deposits of the polar ice sheets are precious sources of information on the volcanic forcing of the climate system in the recent or remote past.
Arina N. Veres   +6 more
doaj   +1 more source

Magnetic Bead-Based Colorimetric Immunoassay for Aflatoxin B1 Using Gold Nanoparticles

open access: yesSensors, 2014
A competitive colorimetric immunoassay for the detection of aflatoxin B1 (AFB) has been established using biofunctionalized magnetic beads (MBs) and gold nanoparticles (GNPs).
Xu Wang   +2 more
doaj   +1 more source

New Experimental Tools to Use Noble Gases as Artificial Tracers for Groundwater Flow

open access: yesFrontiers in Water, 2022
Labeling groundwater by injecting an artificial tracer is a standard and widely used method to study groundwater flow systems. Noble gases dissolved in groundwater are potentially ideal artificial tracers, as they are not subject to biogeochemical ...
Matthias S. Brennwald   +8 more
doaj   +1 more source

The technological development of drinking water treatment plants in the Czech Republic

open access: yesWater Policy, 2023
Several actors have an impact on the quality of drinking water, but ultimately drinking water treatment plants (DWTPs) play a decisive role in ensuring that water quality complies with public regulations.
Geir Inge Orderud   +6 more
doaj   +1 more source

Analysis of Benzo[a]pyrene in Vegetable Oils Using Molecularly Imprinted Solid Phase Extraction (MISPE) Coupled with Enzyme-Linked Immunosorbent Assay (ELISA)

open access: yesSensors, 2014
This paper describes the development of a molecularly imprinted polymer-based solid phase extraction (MISPE) method coupled with enzyme-linked immunosorbent assay (ELISA) for determination of the PAH benzo[a]pyrene (B[a]P) in vegetable oils.
Michael Pschenitza   +3 more
doaj   +1 more source

Thoughts on planning of Tianjin Zhangdaokou seismological observatory

open access: yes地震科学进展, 2020
This paper briefly introduces the history of Zhangdaokou seismological station and analyzes the present situation. The paper also suggests that the station needs to be replanned and renovated.
Boyang Wu   +5 more
doaj   +1 more source

HYDROCHEMISTRY OF THE TYRMA RIVER

open access: yesRegional problems, 2021
The spatial-temporal dynamics of the dissolved substances content in the Tyrma River water and in its tributaries have been studied by the author. It was found great differences in the values of mineralization and concentrations of HCO3-, Ca2+, Mg2+ and Fe, due to natural conditions of the territory.
openaire   +2 more sources

Anthropogenic pressure on the largest lakes of the River Tywa catchment

open access: yesLimnological Review, 2017
The largest lakes of the River Tywa basin i.e. Strzeszowskie, Dołgie, Swobnica and Dłużec (north-west Poland, West Pomeranian Lakeland) were studied in the period 2008–2013, usually in a six week cycle. The aim of the study was to determine the degree of
Kubiak Jacek   +3 more
doaj   +1 more source

High-Density Microalgae Cultivation in Open Thin-Layer Cascade Photobioreactors with Water Recycling

open access: yesApplied Sciences, 2020
(1) Background: Recycling of water and non-converted nutrients is considered to be a necessity for an economically viable production of microalgal biomass as a renewable feedstock.
Torben Schädler   +6 more
doaj   +1 more source

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