Titlebook: Metal Metabolism in Aquatic Environments; William J. Langston,Maria Jo?o Bebianno Book 1998 Springer Science+Business Media Dordrecht 1998

精密

Determinants of trace metal concentrations in marine organisms,entrations in an array of marine organisms collected from numerous locations. However, it is evident that information concerning the factors that determine the metal burdens of these organisms is patchy, with certain groups more thoroughly investigated than others; for example, contrast the molluscs with macroalgae.

背帶

Influence of ecological factors on accumulation of metal mixtures,ents. Thus, the concurrent presence of two or more metallic contaminants in the organism often yields metal uptake that deviates from those currently observed for individual metals. If the effect is an enhancement of bioaccumulation, it is said to be synergistic. If the effect is a decrease of metal incorporation, it is said to be antagonistic.

暴露他抗議

The interactions between living organisms and metals in intertidal and subtidal sediments,ater interface. Benthic animals and rooted plants disrupt this simple structure by burrowing into the sediment or by growing roots. This affects the rates of transport of gases, solutes and particulate matter within the sediment and between the sediment and the overlying water.

統(tǒng)治人類

Mercury in aquatic ecosystems,y of Hg, increased bioavailability of Hg due to environmental changes caused by human activities, and efficient accumulation of Hg by organisms and certain natural materials, such as soil organic matter and fine-grained sediments. Moreover, Hg is a relatively volatile element, and this accounts, in large part, for its wide distribution.

說(shuō)不出

arthroscopy

Mechanisms of metal uptake,litated the evolution of life. One of the aspects that he focused on was the unique properties of water that enabled life to survive in this medium. These included its specific heat, latent heats of melting and evaporation, thermal conductivity, surface tension, expansion before freezing, and solven

largesse

The interactions between living organisms and metals in intertidal and subtidal sediments,absence of physical disturbances, the chemical structure is simple and consists of layers of gradually changing composition parallel to the sediment—water interface. Benthic animals and rooted plants disrupt this simple structure by burrowing into the sediment or by growing roots. This affects the r

重疊

Aspirin

Metal accumulation and impacts in phytoplankton,c systems. Phytoplankton are efficient accumulators of most reactive elements. Many inorganic compounds, including most metals, are involved in the oxidative and reductive reactions that comprise cellular metabolism. Some elements are required in small quantities but are toxic in larger quantities.

無(wú)聊的人

Mercury in aquatic ecosystems,ls, it is not known to perform any essential biochemical function (Bowen, 1966). Traces of Hg are ubiquitous in soils, natural waters, sediments, organisms and air (Jonasson and Boyle, 1972), and anomalously high Hg concentrations occur in many ecosystems owing to Hg pollution (a serious, widespread