Interaction of nanoplastics with extracellular polymeric substances (EPS) in the aquatic environment: A special reference to eco-corona formation and associated impacts

2021 ◽  
pp. 117319
Author(s):  
Muhammad Junaid ◽  
Jun Wang
Keyword(s):  
Special Reference ◽  
Aquatic Environment ◽  
Extracellular Polymeric Substances ◽  
Corona Formation

Interaction between Enrofloxacin and the Extracellular Polymeric Substances from Platymonas Subcordiformis

2014 ◽  
Vol 1015 ◽  
pp. 531-535
Author(s):  
Li Yun Ge ◽  
Shu Juan Li ◽  
Chang Rong Zhao ◽  
Huan Huan Deng
Keyword(s):  
Fluorescence Spectroscopy ◽  
Fluorescence Intensity ◽  
Aquatic Environment ◽  
Marine Algae ◽  
Extracellular Polymeric Substances ◽  
Platymonas Subcordiformis ◽  
Excitation Emission Matrix ◽  
Quinolone Antibiotics

Extracellular polymeric substances (EPS) in marine algae-Platymonas subcordiformisaffected by enrofloxacin (ENR), the typical quinolone antibiotics released to the environment through different ways, was studied. A 3-dimension EEM (excitation –emission matrix) fluorescence spectroscopy was used to examine the interaction between EPS and ENR, and the fluorescent peaks A and B were detected, whose fluorescence intensity remarkably decreased with the increased ENR concentration. It was demonstrated that the interaction of EPS with ENR well fitted the modified Stern-Volmer. It was concluded that the presence of EPS in marine algae affected the transport and transform of antibiotics in aquatic environment.

Studies on reflexion of light from silvery surfaces of fishes, with special reference to the bleak, Alburnus alburnus

1965 ◽  
Vol 45 (3) ◽  
pp. 683-703 ◽  
Author(s):  
E. J. Denton ◽  
J. A. C. Nicol
Keyword(s):  
Special Reference ◽  
Aquatic Environment ◽  
The Body ◽  
Natural Light ◽  
Light Conditions ◽  
Trachurus Trachurus ◽  
Reflecting Surfaces ◽  
Bleak Alburnus Alburnus ◽  
Different Parts

The problem of how a fish can make itself invisible in the natural light-conditions in an aquatic environment is discussed with particular reference to the silvery surfaces of fish.In fish which we have examined, the silvery surfaces are of two types: (1) an argenteum which consists of long thin crystals of guanine whose reflecting surfaces are approximately parallel with the surface of the fish; (2) layers of guanine crystals lying either on the inner surfaces of the scales or in the subdermis—these crystals are not, in general, orientated with their reflecting surfaces parallel with the surfaces of the fish, and are much broader than those of the argenteum.Methods are described by which the orientation of the crystal planes with respect to the planes of the scales on which they lie can be determined.The orientation of the crystals of type 2 in different parts of the body is described for the horse mackerel, Trachurus trachurus (L.), and for the bleak, Alburnus alburnus (L.).For the bleak it is shown that although the planes of the crystals are often very much inclined with respect to the planes of the scales, the long axes of the crystals are always approximately parallel with the planes of scales. The inclination of the crystals, therefore, is away from the scales across their short axes.Measurements of the light transmitted by silvery scales of the bleak show that they reflect light strongly when this falls obliquely on the crystals which they contain and that they are most transparent to light which strikes the scales in a direction perpendicular to the reflecting planes of the crystals.

scholarly journals A Review of Riverbed Extraction and its Effects on Aquatic Environment with Special Reference to Tinau River, Nepal

2012 ◽  
Vol 11 ◽  
pp. 49-56 ◽  
Author(s):  
Khet Raj Dahal ◽  
Subodh Sharma ◽  
Chhatra Mani Sharma
Keyword(s):  
Literature Review ◽  
Special Reference ◽  
Ground Water ◽  
Aquatic Environment ◽  
Hydraulic Structures ◽  
River Morphology ◽  
Climatic Data ◽  
River Catchment ◽  
Natural Rivers ◽  
Over Time

Rivers not only maintain the ecological balance but also generate resources. Fishes and riverbed materials such as sand, cobble, pebble, boulders, etc. are the sources of income from natural rivers; and these are the important resources in the construction industry.There exist very few studies on the effects of riverbed extraction in the rivers like Tinau. The lack of generic hydrological and climatic data in the river catchment leads to the lack of knowhow regarding the hydrological behavior of the river basin and its consequences over time. This study is the outcome of the literature review on riverbed extraction and its effects on the aquatic environment particularly in the Tinau River. Riverbed extraction can cause many effects on the environment. But this paper mainly focuses on the effects of riverbed extraction on the hydraulic structures, ground water, river morphology, cost externalization, fish species and fisheries for livelihood.DOI: http://dx.doi.org/10.3126/hn.v11i0.7163 Hydro Nepal Vol.11 2011 pp.49-56

Transformations that affect fate, form and bioavailability of inorganic nanoparticles in aquatic sediments

2015 ◽  
Vol 12 (6) ◽  
pp. 627 ◽  
Author(s):  
Richard Kynaston Cross ◽  
Charles Tyler ◽  
Tamara S Galloway
Keyword(s):  
Aquatic Environment ◽  
Extracellular Polymeric Substances ◽  
Inorganic Nanoparticles ◽  
Engineered Nanomaterials ◽  
Future Research ◽  
Aquatic Sediments ◽  
Research Areas ◽  
Engineered Nanomaterial ◽  
State Of Research ◽  
Prospective Risk

Environmental context Engineered nanomaterials are increasingly being used and their release to the aquatic environment poses potential risk. We review the research on transformations of engineered nanomaterial in the aquatic sediment environments, and consider the implications of their release. The key factors defining the fate of engineered nanomaterials in aqueous and sediment systems are identified. Abstract Inorganic nanoparticles are at risk of release into the aquatic environment owing to their function, use and methods of disposal. Aquatic sediments are predicted to be a large potential sink for such engineered nanomaterial (ENM) emissions. On entering water bodies, ENMs undergo a range of transformations dependent on the physicochemical nature of the immediate environment, as they pass from the surface waters to sediments and into sediment-dwelling organisms. This review assesses the current state of research on transformations of metal-based ENMs in the aquatic environment, and considers the implications of these transformations for the fate and persistence of ENMs and their bioavailability to organisms within the benthos. We identify the following factors of key importance in the fate pathways of ENMs in aqueous systems: (1) extracellular polymeric substances, prevalent in many aquatic systems, create the potential for temporal fluxes of ENMs to the benthos, currently unaccounted for in predictive models. (2) Weak secondary deposition onto sediment grains may dominate sediment–ENM interactions for larger aggregates >500nm, potentially granting dynamic long-term mobility of ENMs within sediments. (3) Sulfurisation, aggregation and reduction in the presence of humic acid is likely to limit the presence of dissolved ions from soluble ENMs within sediments. (4) Key benthic species are identified based on their ecosystem functionality and potential for ENM exposure. On the basis of these findings, we recommend future research areas which will support prospective risk assessment by enhancing our knowledge of the transformations ENMs undergo and the likely effects these will have.

Interplay between extracellular polymeric substances (EPS) from a marine diatom and model nanoplastic through eco-corona formation

2020 ◽  
Vol 725 ◽  
pp. 138457 ◽  
Author(s):  
Giacomo Grassi ◽  
Edi Gabellieri ◽  
Patrizia Cioni ◽  
Eugenio Paccagnini ◽  
Claudia Faleri ◽  
...  
Keyword(s):  
Extracellular Polymeric Substances ◽  
Marine Diatom ◽  
Corona Formation

Electron Microscopy in the Study of Natural Phytoplankton Assemblages

1985 ◽  
Vol 43 ◽  
pp. 620-623
Author(s):  
Linda Sicko-Goad
Keyword(s):  
Electron Microscopy ◽  
Aquatic Environment ◽  
Size Range ◽  
Physical Parameters ◽  
Specific Information ◽  
Phytoplankton Assemblages ◽  
Phytoplankton Productivity ◽  
Ecosystem Effects ◽  
Time Of Year ◽  
Species Specific

Although the use of electron microscopy and its varied methodologies is not usually associated with ecological studies, the types of species specific information that can be generated by these techniques are often quite useful in predicting long-term ecosystem effects. The utility of these techniques is especially apparent when one considers both the size range of particles found in the aquatic environment and the complexity of the phytoplankton assemblages.The size range and character of organisms found in the aquatic environment are dependent upon a variety of physical parameters that include sampling depth, location, and time of year. In the winter months, all the Laurentian Great Lakes are uniformly mixed and homothermous in the range of 1.1 to 1.7°C. During this time phytoplankton productivity is quite low.

Lycopene alleviates sulfamethoxazole-induced hepatotoxicity in grass carp (Ctenopharyngodon idellus) via suppression of oxidative stress, inflammation and apoptosis

2020 ◽  
Vol 11 (10) ◽  
pp. 8547-8559
Author(s):  
Hongjing Zhao ◽  
Yu Wang ◽  
Mengyao Mu ◽  
Menghao Guo ◽  
Hongxian Yu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Secondary Metabolites ◽  
Human Health ◽  
Grass Carp ◽  
Aquatic Environment ◽  
Ctenopharyngodon Idellus

Antibiotics are used worldwide to treat diseases in humans and other animals; most of them and their secondary metabolites are discharged into the aquatic environment, posing a serious threat to human health.

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