📘 ❞ Radioactivity in the Environment Radioactivity in the Terrestrial Environment ❝ كتاب ــ George Shaw اصدار 2007
Biology Books - 📖 ❞ كتاب Radioactivity in the Environment Radioactivity in the Terrestrial Environment ❝ ــ George Shaw 📖
█ _ George Shaw 2007 حصريا كتاب Radioactivity in the Environment Terrestrial 2024 Environment: نبذه عن الكتاب: Until relatively recently environment was taken for granted as satisfier of all mankind’s needs, providing food, mineral and biological resources a seemingly limitless facility for the disposal waste materials Today, it is increasingly evident that capacity natural systems to absorb wastes contaminants modern human existence limited These limits are both quantitative qualitative Some our naturally occurring and even essential substances, such CO2, but being produced ever increasing quantities which simply overload biogeochemical systems maintain steady state chemical compositions atmosphere, hydrosphere lithosphere Other substances are produced small quantities potentially so detrimental their presence environment, even at low levels, sufficient cause concern Prominent among this latter category radionuclides, some which natural components but many present largely result man’s activities Widespread, level contamination from anthropogenic sources can be traced back least Roman times, approximately 2000 years before present, when lead and silver mining smelting were carried out several major sites across Europe (Rosman et al , 1997) The environmental record lead deposition particularly revealing In northern Scandinavia, instance, Brannvall et (1999) have detected from the period also shown beginnings increase concentrations lake sediments can be 900 AD Biology Books مجاناً PDF اونلاين Biologically Biology science concerned with study life, its various forms function, how these organisms interact each other surrounding word biology Greek made up two words: bio (βίος) meaning life And loggia ( λογία) means or Biology: similarity vegetation animal cover on edges African American states, same fossil Branches biology Biology an ancient thousands old began nineteenth century This has multiple branches Among them are: Anatomy Botany Biochemia Biogeography Biofisia Cytology cell science Ecology science Development Embryology embryology Genetics genetics Histology histology Anthropology anthropology Microbiology bacteriology Molecular Biology Physiology functions organs Taxonemia taxonomy Virology virology Zoology zoology
كتاب
Radioactivity in the Environment Radioactivity in the Terrestrial Environment
ــ George Shaw
صدر 2007م
كتاب
Radioactivity in the Environment Radioactivity in the Terrestrial Environment
ــ George Shaw
صدر 2007منبذه عن الكتاب:
Until relatively recently the environment was taken for granted as the satisfier of all mankind’s
needs, providing food, mineral and biological resources and a seemingly limitless facility for
the disposal of waste materials. Today, it is increasingly evident that the capacity of natural
systems to absorb the wastes and contaminants of modern human existence is limited. These
limits are both quantitative and qualitative. Some of our wastes are naturally occurring and
even essential substances, such as CO2, but are being produced in ever increasing quantities
which simply overload the capacity of biogeochemical systems to maintain the steady state
chemical compositions of the atmosphere, hydrosphere and lithosphere. Other substances are
produced in small quantities but are potentially so detrimental that their presence in the environment, even at low levels, is sufficient to cause concern. Prominent among this latter
category are radionuclides, some of which are natural components of the environment but
many of which are present largely as a result of man’s activities.
Widespread, low-level contamination of the environment from anthropogenic sources can
be traced back at least to Roman times, approximately 2000 years before present, when lead
and silver mining and smelting were carried out at several major sites across Europe (Rosman
et al., 1997). The environmental record for lead deposition is particularly revealing. In northern Scandinavia, for instance, Brannvall et al. (1999) have detected the presence of lead from
the Roman period but have also shown the beginnings of a steady increase in lead concentrations in lake sediments which can be traced back to 900 AD.
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