170 documents found, page 1 of 17

Changes in seabed mining

• The present chapter provides an update to chapter 23 of the first World Ocean Assessment (United Nations, 2017a) in terms of shallow-water aggregate, placer deposits, ironsand deposits and phosphorite deposits. It focuses on exploration licences for deepwater seabed mineral resources, the number of which has increased significantly since the first Assessment. • New technologies to reduce impacts on the marine...

Editorial: Emerging topics in coastal and transitional ecosystems: science, lit...

Marine coastal and transitional ecosystems are facing increasing impacts, and often reflect the most immediate effects of environmental change, habitat destruction, and biodiversity loss. With over half of the population currently living in coastal areas, these areas are of interest for multiple uses and resources, as well as subjected to multiple stressors and associated impacts derived from local and upstream...

Influence of particle size on ecotoxicity of low-density polyethylene microplas...

This study investigated the ecotoxicological effects of differently sized (4–6 µm and 20–25 µm) low-density polyethylene (LDPE) microplastics (MPs), with and without adsorbed benzo-a-pyrene (BaP), in clam <i>Scrobicularia plana</i>. Biomarkers of oxidative stress (superoxide dismutase—SOD; catalase—CAT), biotransformation (glutathione-S-transferases—GST), oxidative damage (lipid peroxidation—LPO) and neurotoxic...

Correction to: Characterization of a fatty acid-binding protein from the Pacifi...

Nanoplastics impact on marine biota: a review

Emerging contaminants, such as nanoplastics, are gaining a vast interest within the scientific community. Most of the plastic debris found in the marine environment originates from land-based sources, and once in the marine environment, plastic can be degraded into smaller fragments. Nanoplastics are considered to fall within the definition of other nanoparticles (1 to 100 nm in size) and may be divided into pr...

Characterization of a fatty acid-binding protein from the Pacific oyster (Crass...

Pharmaceuticals and their metabolites constitute a class of xenobiotics commonly found in aquatic environments which may cause toxic effects in aquatic organisms. Several different lipophilic molecules, including some pharmaceuticals, can bind to fatty acid-binding proteins (FABPs), a group of evolutionarily related cytoplasmic proteins that belong to the intracellular lipid-binding protein (iLBP) family. An oy...

Are litter, plastic and microplastic quantities increasing in the ocean?

Whilst both plastic production and inputs at sea have increased since the 1950s, several modelling studies predict a further increase in the coming years in these respective quantities. We compiled scientific literature on trends in marine litter, consisting largely of plastic and microplastics in the ocean, understanding that monitoring programs or assessments for these aspects are varied, frequently focusing ...

Perfluorooctane sulfonic acid (PFOS) adsorbed to polyethylene microplastics: ac...

Microplastics are widespread in the marine environment, whereby organisms’ uptake these tiny particles, presenting adverse biological responses. Plastic debris also act as a vector of many contaminants which intensify their effects to marine organisms that depend on type, size, shape and chemical properties. This study aimed to assess the accumulation and potential toxicity of different sizes of microplastics w...

Effects of the UV filter, oxybenzone, adsorbed to microplastics in the clam Scr...

Microplastics (MPs) lipophilic nature and widespread distribution raises concerns due to their increasing presence in the marine environment and their ability to adsorb organic contaminants, as being potential vehicles for transport and potential source of accumulation of organic contaminants by marine organisms. The organic UV-filter, oxybenzone (BP-3) is a constituent of sunscreens and personal care products,...

Effects of mixtures of anticancer drugs in the benthic polychaete Nereis divers...

Made available in DSpace on 2019-10-06T16:36:25Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-09-01; Chartered Institute of Management Accountants; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); The increasing consumption of anticancer drugs through single and/or combinatory chemotherapy worldwide raised concern regarding their toxicity burden in coastal zones. The toxicity of a ...