Selenium

PrefaceChapter I. History ReferencesChapter 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 ReferencesChapter 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 ReferencesChapter 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 ReferencesChapter 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 ReferencesChapter 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 ReferencesChapter 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 ReferencesChapter 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 ReferencesChapter 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 ReferencesChapter VII. Selenium in Nutrition Selenium in Livestock Nutrition Selenium in Laboratory Animal Nutrition Selenium in Chick Nutrition Selenium in Human Nutrition Proposed Experimentation ReferencesChapter 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 ReferencesChapter 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 ReferencesChapter 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 ReferencesAuthor IndexSubject Index