Selenium

Selenium: Geobotany, Biochemistry, Toxicity, and Nutrition focuses on the properties, characteristics, reactions, applications, chemistry, and transformations of selenium.
The book first offers information on the geological distribution of selenium, including the formation of seleniferous soils, chemical forms of selenium in soils, selenium in water, selenium on the sea floor and in sea water, and geobotany. The text then takes a look at selenium indicator in plants and accumulation of selenium by plants. Discussions focus on selenium accumulations in indicator plants; selenium accumulation in farm crops and native grasses; factors that influence selenium accumulation in plants; and identification of indicators by germination tests.
The manuscript elaborates on selenium poisoning in animals and prevention and control of selenium poisoning. Acute selenium poisoning, chronic selenium poisoning by inorganic selenium, and recognition of poisonous range plants are also discussed. The text also examines selenium in nutrition and the chemistry of selenium.
The publication is a valuable source of data for readers interested in the study of selenium.

Inhalt
Preface
Chapter I. History

References

Chapter II. Geological Distribution of Selenium

Origin of Selenium

Stratigraphic Principles

Seleniferous Rocks and Minerals

The Formation of Seleniferous Soils

Chemical Forms of Selenium in Soils

Selenium Content of Soils

Selenium in Soils of Other Countries

Selenium in Water

Selenium on the Sea Floor and in Sea Water

Geobotany

References

Chapter III. Selenium Indicator Plants

Genus Astragalus

Astragalus L. Milk Vetch

Key to Seleniferous Species of Astragalus

Nonindicator Species of Astragalus

Section Xylorhiza of Machaeranthera

Section Xylorhiza of Machaeranthera, Woody Aster

Section Oonopsis of Haplopappus

Section Oonopsis of Haplopappus, Goldenweed

Genus Stanleya

Stanleya Prince's Plume

Secondary Selenium Absorbers

Identification of Indicators by Germination Tests

Selenium Effect on Primary Indicators

Physiological Differentiation in Astragalus

Herbarium Collections of Astragalus

References

Chapter IV.Accumulation of Selenium by Plants

Selenium-Accumulating Capacity of Plants

Selenium Accumulation in Indicator Plants

Selenium Accumulation in Farm Crops

Selenium Accumulation in Native Grasses

Comparative Selenium Accumulation by Plants

Factors that Influence Selenium Accumulation in Plants

Toxic Effects of Selenium on Plants

Chemical Forms of Selenium in the Plant

References

Chapter V. Selenium Poisoning in Animals

Livestock

Acute Selenium Poisoning

Chronic Selenium Poisoning

Chronic Poisoning of the Blind-Staggers Type

Chronic Poisoning of the Alkali-Disease Type

Chronic Selenium Poisoning by Inorganic Selenium

Laboratory Animals

Acute Selenium Poisoning

Subacute and Chronic Selenium Poisoning

The Effect of Selenium on Reproduction and Congenital

Malformations

Insects and Mites

Other Animals

References

Chapter VI. Prevention and Control of Seleniuis Poisoning

Mapping of Seleniferous Areas

Recognition of Poisonous Range Plants

Land Management

Tolerance Limits

Selection of Animals

Grazing Control

Trailing Livestock

Use of Herbicides

Irrigation

Selection of Crops

Crops for Industrial Use

References

Chapter IV. Accumulation OF Selenium by Plants

Selenium-Accumulating Capacity of Plants

Selenium Accumulation in Indicator Plants

Selenium Accumulation in Farm Crops

Selenium Accumulation in Native Grasses

Comparative Selenium Accumulation by Plants

Factors that Influence Selenium Accumulation in Plants

Toxic Effects of Selenium on Plants

Chemical Forms of Selenium in the Plant

References

Chapter V. Selenium Poisoning in Animals

Livestock

Acute Selenium Poisoning

Chronic Selenium Poisoning

Chronic Poisoning of the Blind-Staggers Type

Chronic Poisoning of the Alkali-Disease Type

Chronic Selenium Poisoning by Inorganic Selenium

Laboratory Animals

Acute Selenium Poisoning

Subacute and Chronic Selenium Poisoning

The Effect of Selenium on Reproduction and Congenital

Malformations

Insects and Mites

Other Animals

References

Chapter VI. Prevention and Control of Seleniuis Poisoning

Mapping of Seleniferous Areas

Recognition of Poisonous Range Plants

Land Management

Tolerance Limits

Selection of Animals

Grazing Control

Trailing Livestock

Use of Herbicides

Irrigation

Selection of Crops

Crops for Industrial Use

References

Chapter VII. Selenium in Nutrition

Selenium in Livestock Nutrition

Selenium in Laboratory Animal Nutrition

Selenium in Chick Nutrition

Selenium in Human Nutrition

Proposed Experimentation

References

Chapter VIII. Selenium in Relation to Public Health

Selenium in Local Foods

Survey of Health of Rural Populations

Some Cases of Human Poisoning

Human Chronic Selenosis in Colombia, South America

Dental Caries

Public Health Hazards in Nonseleniferous Areas

Selenium as an Industrial Hazard

References

Chapter IX. Chemistry of Selenium

Physical and Chemical Properties of Selenium

Inorganic Selenium Compounds

Preparation of Sodium or Potassium Selenite

Preparation of Potassium Selenate

Radiochemistry of Selenium

Organoselenium Compounds

Methods of Determination

Reagents

General Method

Determination of Selenium in Various Materials

Estimation of Water-Soluble Selenate, Selenite, and Organic Selenium

Micro Methods for Determination of Selenium .

Use of Selenium Compounds

References

Chapter X. BIochemistry Of Selenium

Metabolic Antagonists of Selenium Compounds

Effects of Selenium Compounds on Cell Growth and Ce

Division

Reduction of Selenium Compounds

Biological Selenium Activation and Transmethylation

The Effect of Selenium Compounds on Enzyme Systems

Biosynthesis of Organic Selenium Compounds

References

Author Index

Subject Index

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