Aquatic organisms

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  • Fish are aquatic vertebrates with fins for appendages. They "breathe" by means of gills. Fish make up the largest of the vertebrate groups with over 20,000 species. They can be found in a great variety of lakes, streams, oceans and estuaries. Fish are divided into two groups based on the composition of their skeletons. The sharks, skates and rays are cartilaginous fish. Their skeletons are made of cartilage, the same flexible material in your ear lobes and nose. The majority of fish have skeletons made of bone and are called bony fish....

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  • The National Council on Radiation Protection and Measurements (NCRP) was requested by the US Department of Energy (DOE) to review the literature on the effects of radiation on aquatic organisms and develop a document that reviews the present understanding of such effects and provides guidance for a standard for the protection of populations of aquatic organisms.

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  • Pesticides in the Hydrologic System is a series of comprehensive reviews and analyses of our current knowledge and understanding of pesticides in the water resources of the United States and of the principal factors that influence contamination and transport. The series is presented according to major components of the hydrologic system—the atmosphere, surface water, bed sediments and aquatic organisms, and ground water.

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  • (bq) part 2 book “environmental toxicity of nanomaterials” has contents: nanotoxicity on human and plant pathogenic microbes and aquatic organisms, in vitro and in vivo nanotoxicity evaluation in plants, phytochemicals and their functionalized nanoparticles as quorum sensing inhibitor and chemotherapeutic agen,… and other contents.

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  • To determine the potential biochemical effects of heavy metal pollution on aquatic organisms, pleopodal eggs and stage-1 juveniles of the freshwater crayfish, Astacus leptodactylus (Eschscholtz, 1823), was exposed to a non-essential (Cd) and an essential (Cu) metal, either singly or in combination.

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  • Much new material has been added to this second edition. Besides a totally new chapter on radionuclides, the text has been reorganized and updated with separate chapters on metals, light nonaqueous phase liquids (LNAPLs), dense nonaqueous phase liquids (DNAPLs), and biodegradation. Also, some end-of-chapter exercises have been added. The dictionary of inorganic pollutants has been enlarged and some important organic pollutants added.

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  • The long-term approach to achieving protection is “ecological separation.” A true ecological separation is defined as no inter-basin transfer of aquatic organisms via the Chicago Waterway System at any time – 100% effectiveness. Ecological separation prohibits the movement or interbasin transfer of aquatic organisms between the Mississippi and Great Lakes basins via the CWS. Once established, the impacts of invasive species on ecosystem health are permanent and irreversible.

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  • Aquatic scientists have always been intrigued with concepts of scale. This interest perhaps stems from the nature of ßuid dynamics in oceans and lakes — energy cascades from spatial scales of kilometers down to viscous scales at centimeters or less. Turbulent processes affect not only an organism’s perception of, and response to, the physical environment, but also the interaction between species, both within and across trophic levels.

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  • The results showed that the model not only treated organic matter well but also removed nearly completely both nitrogen and phosphorus. For loading rate of 0.75 kgCOD/m3 /day, treatment efficiencies of COD, NH4 + -N, TN, TP of the model were the highest as 91.02, 96.82, 84.08, 86.66 %, respectively and output values of these parameters were within the limits of QCVN 11:2008/BTNMT, column A.

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  • Aquaculture, also known as aquafarming, is the farming of aquatic organisms such as fish, crustaceans, molluscs and aquatic plants.[1][2] Aquaculture involves cultivating freshwater and saltwater populations under controlled conditions, and can be contrasted with commercial fishing, which is the harvesting of wild fish.[3] Mariculture refers to aquaculture practiced in marine environments and in underwater habitats.

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  • This book stems from the author’s experience with a variety of problems on the fate, distribution, and toxicity of organic compounds in the aquatic environment. It became increasingly clear that the procedures for investigating these problems crossed the traditional boundaries of organic and analytical chemistry, microbiology, and biology, and after many years this resulted in the idea of selecting the relevant aspects of these and writing the present book

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  • Another study conducted in a kaolin refinery industry produces hazardous by-product such as Al, Fe, and Zn. In kaolin processing, sulphuric acid is used to improve the whitening (Jordao et al., 2002) is discharged to the river waters. This will influence the well being of aquatic organisms that adapted well at close to neutral pH. Also, in order not to affect the colour and whiteness of paper, impurities such as iron oxides is needed to be removed. This can be made through the reduction of Fe(III) to Fe(II) with metallic Zn. Therefore, Zn, Fe, Al are usually present in the discharge....

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  • Yadav et al. (2007) studied on fertilizer industrial discharge showed that some components in the discharge may interact with each other and produce toxic to aquatic organisms. For instance, the interaction between dissolved oxygen and ammonia changed the respiratory physiology in fresh water fish. In addition, results showed that the toxicity of the effluent in fish depends on concentration and duration of exposure.

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  • Dietary Metals Exposure and Toxicity to Aquatic Organisms: Implications for Ecological Risk Assessment - Ảnh hưởng của ô nhiễm yếu tố dấu vết trên các hệ sinh thái ven biển và cửa sông nhận được sự chú ý đáng kể trong 50 đến 60 năm qua. 1 Đánh giá rủi ro khuôn khổ cung cấp một phương tiện để xác định số lượng những ảnh hưởng này, và phát triển các lựa chọn thay thế quản lý để đối phó với ô nhiễm yếu tố lịch sử và liên tục theo dõi. Định lượng nguy cơ của kim loại cho các hệ thống thủy sản bây giờ...

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  • Picocyanobacteria are a diverse and widespread group of photosynthetic prokaryotes and belong to the main group of primary producers (Castenholz & Waterbury. 1989; Rippka, 1988). Picoeukaryotes, meanwhile, are a diverse group that is widely distributed in the marine environment, and they have a fundamental role in aquatic ecosystems because of their high productivity. Like bacteria, marine viruses are thought to play important roles in global and small-scale biogeochemical cycling.

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  • The house is 17.0 m long and 8.2 m wide, with a height of 3.4 m from the ground to the crest of the roof. The floor area is 127 m2 ; the enclosed volume is 310 m3 . The floor plan consists of three bedrooms, two bathrooms and a combined family, kitchen, dining and living area. The subfloor is plywood; 17 % of the floor area is resilient vinyl flooring; 72 % of the floor area is carpeted. The house is unfurnished with the exception of preinstalled kitchen and bath cabinetry and the monitoring equipment (described below)...

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  • CHAPTER 6 The Effects of Gold on Plants and Animals Lethal and sublethal effects of Au0, Au+, and Au+3 are summarized for aquatic organisms and laboratory mammals. Gold accumulations from solution are documented for microorganisms and other living resources under various physicochemical conditions. 6.1 AQUATIC ORGANISMS This section summarizes lethal and sublethal effects of Au+ and Au+3 on aquatic microorganisms, plants, fishes, and amphibians. 6.1.1 Monovalent Gold Monovalent gold is toxic to aquatic biota at comparatively elevated concentrations of 7.

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  • Mining wastes can cause significant ecological destruction. Often, solid mine wastes are dumped into streams, destroying habitat and causing siltation and heavy metal and other contamination. Even when such wastes are stored out of water channels, trace materials can leach into surface waters and infiltrate into local groundwater. Fine- grained tailings can wash into local waterways and degrade streams by covering and filling coarser-grained substrates.

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  • Bioremediation, the use of microorganisms, by virtue of their bioconcentrating and metabolic properties, to degrade, sequester, or remove environmental contaminants, has about a 45-year history. Such uses of microorganisms for this purpose now involve freshwater, marine, and terrestrial environments. Bioremediation is a multidisciplinary area of knowledge and expertise that involves basic and applied science. Microbiologists, chemists, toxicologists, environmental engineers, molecular biologists, and ecologists have made major contributions to this subject....

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  • Science is occurring all around you, and the opening photo of each chapter will preview the science you will be learning about. The Chapter Preview will give you an idea of what you will be learning about, and you can try the Launch Lab to help get your brain headed in the right direction. The Foldables exercise is a fun way to keep you organized.

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