Results 11 to 20 of about 2,970,098 (199)

On the Redox Activity of Urban Aerosol Particles: Implications for Size Distribution and Relationships with Organic Aerosol Components

open access: yesAtmosphere, 2017
This article presents the distribution of the dithiothreitol-based (DTT) redox activity of water-soluble airborne particulate matter (PM) from two urban sites in the city of Thessaloniki, northern Greece in four size ranges (<0.49, 0.49–0.97, 0.97–3.0
Constantini Samara
doaj   +1 more source

Differences in the Efficiency of the Vertical Transfer of Windblown Sediment over Different Ploughed Surfaces during Wind Erosion Events

open access: yesLand, 2021
Airborne sediment fluxes were measured in southern Tunisia on two experimental plots tilled with a moldboard and a tiller plough, respectively, during five wind erosion events of different intensities. The sediment fluxes were sampled on both plots using
Mohamed Taieb Labiadh   +6 more
doaj   +1 more source

Concentration and Size Distribution of Fungi Aerosol over Oceans along a Cruise Path during the Fourth Chinese Arctic Research Expedition

open access: yesAtmosphere, 2013
Bioaerosol can act as nuclei and thus may play an important role in climate change. During the Fourth Chinese National Arctic Research Expedition (CHINARE 2010) from July to September 2010, the concentrations and size distributions of airborne fungi ...
Zheng Li   +6 more
doaj   +1 more source

Aggregate particle size interrelations and case study in concrete using white ordinary Portland cement

open access: yesInformador Técnico, 2020
The size distribution, the gradation and the type of aggregates are factors of great relevance for the design of mixtures in concrete and construction materials in general since these allow us to obtain information on the voids contents, module fineness,
Henry Colorado-Lopera   +2 more
doaj   +1 more source

Evolutionary Palaeoecological and Morphological Response of Globorotalia menardii to Environmental Stress Conditions Preceding the Tortonian–Messinian Boundary in the Mediterranean Basin

open access: yesJournal of Marine Science and Engineering, 2023
The Tortonian–Messinian transition is associated with important climatic and oceanographic changes in the Mediterranean Basin, which have shaped both the biotic and abiotic nature of this setting.
Evangelia Besiou   +5 more
doaj   +1 more source

Seasonal variability of aerosol concentration and size distribution in Cape Verde using a continuous aerosol optical spectrometer

open access: yesFrontiers in Environmental Science, 2014
One year of, almost continuous, measurements of aerosol optical properties and chemical composition were performed at the outskirts of Praia, Santiago Island, Cape Verde, within the framework of CV-DUST (Atmospheric aerosol in Cape Verde region: seasonal
Casimiro Adrião Pio   +8 more
doaj   +1 more source

Size-Segregated Characteristics of Carbonaceous Aerosols during the Monsoon and Non-Monsoon Seasons in Lhasa in the Tibetan Plateau

open access: yesAtmosphere, 2019
In this paper, we intensively collected atmospheric particulate matter (PM) with different diameters (size ranges: <0.49, 0.49–0.95, 0.95–1.5, 1.5–3.0, 3.0–7.2, and >7.2 μm) in Lhasa during the monsoon and non-monsoon ...
Nannan Wei   +7 more
doaj   +1 more source

Controlled Synthesis of Platinum and Silver Nanoparticles Using Multivalent Ligands

open access: yesNanomaterials, 2022
Here, the controlled formation of platinum nanoparticles (PtNPs) and silver nanoparticles (AgNPs) using amine-functionalized multivalent ligands are reported.
Suguna Perumal   +3 more
doaj   +1 more source

Development of a new hybrid approach combining AFM and SEM for the nanoparticle dimensional metrology

open access: yesBeilstein Journal of Nanotechnology, 2019
At this time, there is no instrument capable of measuring a nano-object along the three spatial dimensions with a controlled uncertainty. The combination of several instruments is thus necessary to metrologically characterize the dimensional properties ...
Loïc Crouzier   +9 more
doaj   +1 more source

Droplet Size Distribution in Sprays Based on Maximization of Entropy Generation

open access: yesEntropy, 2003
: The maximum entropy principle (MEP), which has been popular in the modeling of droplet size and velocity distribution in sprays, is, strictly speaking, only applicable for isolated systems in thermodynamic equilibrium; whereas the spray formation ...
Meishen Li, Xianguo Li
doaj   +1 more source

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