Xem 1-9 trên 9 kết quả Involving marine
  • As early as the middle of the 19th century, scientists were beginning to isolate and characterize organic compounds from nature. Modern studies of the nature of natural products, those compounds not involved in primary metabolic processes, began in the 1930s and 1940s. In the decades that followed, scientists began to focus on why organisms produce these compounds.

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  • The oceans cover over 70% of our planet's surface. Their physical, chemical and biological properties form the basis of the essential controls that facilitate life on Earth. Current concerns such as global climate change, pollution of the world's oceans, declining fish stocks, and the recovery of inorganic and organic chemicals and pharmaceuticals from the oceans call for greater knowledge of this complex medium. This volume brings together a number of experts in marine science and technology to provide a wide-ranging examination of some issues of major environmental impact....

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  • A compilation of the most important aerosol chemical processes involved in known scientific and technological disciplines, Aerosol Chemical Processes in the Environment serves as a handbook for aerosol chemistry. Aerosol science is interdisciplinary, interfacing with many environmental, biological and technological research fields. Aerosols and aerosol research play an important role in both basic and applied scientific and technological fields. Interdisciplinary cooperation is useful and necessary.

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  • Technological innovation prompted by the need to satisfy the changing needs of society, ever more effi ciently and economically, involves complex interactions between three basic systems: the production system, the economic system, and the ecosystem

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  • Seventy-five percent of the world’s poor live in rural areas and most are involved in agriculture. In the 21st century, agriculture remains fundamental to economic growth, poverty alleviation, and environmental sustainability. The World Bank’s Agriculture and Rural Development publication series presents recent analyses of issues that affect the role of agriculture, including livestock, fisheries, and forestry, as a source of economic development, rural livelihoods, and environmental services.

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  • Aluminum alloys also display high fatigue crack growth rate, as much as three times faster than in steel specimens when subjected to the same stress intensity (Czyryca et al 2006). Aluminum alloys are anodic to most other materials used in construction and therefore, susceptible to localized galvanic corrosion. They are also sensitive to stress corrosion cracking. Other concerns involve marine fouling since aluminum alloys cannot be coated with conventional Cu-based antifouling coatings. In summary, the U.S.

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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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  • 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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  • In 1996, 22,800 young hooded (blueback) seals were hunted and more than 100 charges were laid. Less than one per cent of licensed sealers were involved in this activity, which took place within a period of a few days. The matter went before the Courts and on December 14, 1999 the Newfoundland Court of Appeal struck down section 27 of the Marine Mammal Regulations, which makes it an offence to buy, sell, or trade blueback seal pelts. In 2000, to conform to the policy enacted as a result of the recommendations of the Malouf Report, licence conditions were imposed to...

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