The results of long-term studies the distribution and composition hydrocarbons (HCs) in suspended particulate matter bottom sediments Norwegian Barents Seas during cruises research vessel Akademik Mstislav Keldysh 2016–2020 are presented. An increase HCs concentrations surface water from an average 2.8–8.3 (2016–2017) to 20–23 μg/L (2019–2020) was detected, which due climate change. In sediment...

Abstract The focus of this study is the assessment total suspended particles (TSP) and particulate matter (PM) with various aerodynamic diameters in ambient air Guayaquil, a city Ecuador that features tropical climate. urban annual mean concentrations TSP (Total Suspended Particles), particle such as: PM 10 , 2.5 1 are 31 ± 14 µg m −3 21 9 7 2 respectively. Air mass studies reveal receives clea...

Optical-biogeochemical relationships of particulate and dissolved organic matter are presented in support of remote sensing of the Baltic Sea pelagic. This system exhibits strong seasonality in phytoplankton community composition and wide gradients of chromophoric dissolved organic matter (CDOM), properties which are poorly handled by existing remote sensing algorithms. Absorption and scatterin...

With the change of installation position radiant panel, indoor air distribution formed by attached jet supply will also change, which affect diffusion particulate matter. Through numerical simulation, influence on aerosol particles released human body is studied. It found that within 0 ~ 300s, 97.2% 98.5% are captured wall, and only a small part fine exists in form suspended solids. The final p...

In recent decades, the Canada Basin of the Arctic Ocean has experienced rapidly decreasing summer sea ice coverage and freshening of surface waters. It is unclear how these changes translate to deeper waters, particularly as our baseline understanding of organic carbon cycling in the deep basin is quite limited. In this study, we describe full-depth profiles of the abundance, distribution and c...

in order to understand the importance of particle size and agglomeration for nano-eco-toxicological studies in aquatic environments, the acute toxicity of two different types (suspended powder and colloidal) of silver nanoparticles (agnps) were studied in alevin and juvenilerainbow trout. fish were exposed to each type of agnps at nominal concentrations of 0.032, 0.1, 0.32, 1, 3.2, 10, 32, and ...

This study assessed the characteristics of and changes in the suspended particles and the associated bacteria in an unchlorinated drinking water distribution system and its reservoirs with different water sources. The results show that particle-associated bacteria (PAB) were present at a level of 0.8-4.5 × 10(3) cells ml(-1) with a biological activity of 0.01-0.04 ng l(-1) ATP. Different PAB co...

PURPOSE To evaluate the size and shape of commercially available polyvinyl alcohol (PVA) particles and to determine whether they change in size when suspended in nonionic contrast and in a solution of nonionic contrast and absolute alcohol. METHODS The two-dimensional area and the long and short axis of PVA particles from several different vendors were measured using a light microscope attach...