Intestinal Absorption of Metal Ions, Trace Elements and Radionuclides PDF Download
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Author: S. C. Skoryna
Publisher: Elsevier
ISBN: 1483160041
Category : Medical
Languages : en
Pages : 466
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Book Description
Intestinal Absorption of Metal Ions, Trace Elements, and Radionuclides focuses on the transport of metal ions across biological membranes. The selection first discusses fundamental considerations of ion transport across biological membranes, including passage of ions through the pores of gels or membranes; mobilities of organic and inorganic ions in water; and complexing of alkali metal ions. The text then focuses on ion transport across membranes of high ionic selectivity and transmissivity and their uses in model studies; model systems for transcellular active transport; and detection and implications of active salt transport across biological membranes. The book takes a look at the intestinal absorption of sodium, calcium, and potassium, including sodium and potassium transport in the intestines; use of radioisotopes to assess intestinal flux of calcium in humans; and calcium and structure of cell membranes. The intestinal absorption of zinc, cobalt, and strontium and absorption of copper from the gastrointestinal tract are underscored. The selection is a recommendable source of data for readers interested in the transport of metal ions across biological membranes.
Author: S. C. Skoryna
Publisher: Elsevier
ISBN: 1483160041
Category : Medical
Languages : en
Pages : 466
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Book Description
Intestinal Absorption of Metal Ions, Trace Elements, and Radionuclides focuses on the transport of metal ions across biological membranes. The selection first discusses fundamental considerations of ion transport across biological membranes, including passage of ions through the pores of gels or membranes; mobilities of organic and inorganic ions in water; and complexing of alkali metal ions. The text then focuses on ion transport across membranes of high ionic selectivity and transmissivity and their uses in model studies; model systems for transcellular active transport; and detection and implications of active salt transport across biological membranes. The book takes a look at the intestinal absorption of sodium, calcium, and potassium, including sodium and potassium transport in the intestines; use of radioisotopes to assess intestinal flux of calcium in humans; and calcium and structure of cell membranes. The intestinal absorption of zinc, cobalt, and strontium and absorption of copper from the gastrointestinal tract are underscored. The selection is a recommendable source of data for readers interested in the transport of metal ions across biological membranes.
Author: H. DeWayne Ashmead
Publisher: Charles C. Thomas Publisher
ISBN:
Category : Medical
Languages : en
Pages : 272
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Book Description
Author:
Publisher: Springer Science & Business Media
ISBN: 3642695051
Category : Medical
Languages : en
Pages : 719
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Book Description
The intestine, particularly the small bowel, represents a large surface (in the adult 2 human approximately 200m ) through which the body is exposed to its environment. A vigorous substrate exchange takes place across this large surface: nutrients and xenobiotics are absorbed from the lumen into the bloodstream or the lymph, and simultaneously, the same types of substrate pass back into the lumen. The luminal surface of the intestine is lined with a "leaky" epithelium, thus the passage of the substrates, in either direction, proceeds via both transcellular and intercellular routes. Simple and carrier-mediated diffusion, active transport, pinocytosis, phagocytosis and persorption are all involved in this passage across the intestinal wall. The term "intestinal permeation" refers to the process of passage of various substances across the gut wall, either from the lumen into the blood or lymph, or in the opposite direction. "Permeability" is the condition of the gut which governs the rate of this complex two-way passage. The pharmacologist's interest in the problem of intestinal permeation is twofold: on the one hand, this process determines thebioavailability of drugs and contributes significantly to the pharmacokinetics and toxicokinetics of xeno biotics; on the other hand, the pharmacodynamic effects of many drugs are manifested in a significant alteration of the physiological process of intestinal permeation.
Author: F.C.M. Driessens
Publisher: CRC Press
ISBN: 9780849352805
Category : Medical
Languages : en
Pages : 448
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Book Description
This book provides a comprehensive analysis of biominerals, in particular phosphates and carbonates of calcium. The book begins with a discussion of the theories of solid state chemistry and thermodynamics of ionic solid solutions and applies these theories to show how physiological constituents like sodium, magnesium, carbonate, chloride, fluoride, lead, or strontium influence the formation, stability, and solubility of calcium phosphates. The results of this discussion are then applied to a critical evaluation of data regarding minerals in bone, dentin, and tooth enamel, their formation during growth and turn-over, their stability under physiological conditions and their breakdown under pathological conditions. These principles are also applied to pathological calcifications such as renal calculi, arterial wall calcifications, chondrocalcinosis, dental calculus and salivary stones. A similar approach is used as the authors discuss carbonations such as calcite, dolomite, and aragonite. The book also includes an extensive analysis of the advantageous effects of magnesium supplementation. The wealth of knowledge in this extensive treatise of biominerals is valuable to medical, dental and ecological biologists, as well as scientists and clinicians in the fields of osteoporosis, bone diseases, caries, renal stone disease, parodontology and nutrition.
Author: B. Venugopal
Publisher: Springer Science & Business Media
ISBN: 1468429523
Category : Medical
Languages : en
Pages : 245
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Book Description
Our purpose is to provide understanding for appropriate use of metals in a technical society. Knowledge of metal toxicity is needed for the preven tion, prediction, diagnosis, and therapy of adverse reactions from excess metals in mammals. Metal Toxicity in Mammals is presented in two volumes. Volume 1, Physiologic and Chemical Basis for Metal Toxic ity, provides the basis for understanding the toxic actions of metals recorded in Volume 2, Chemical Toxicity of Metals and Metalloids. The details and bases for many concepts summarized in Volume I are given, with appropriate references, in Volume 2. Thus, references for specific items in Volume 2 are not generally given in Volume 1. The authors reviewed the known toxicity of several heavy metals in anticipation of their use as multinutrient markers for NASA. As more and more metals were considered, the need for a complete review became obvious. This treatise supplants onerous searches of metal-toxicity litera ture up to 1975 and reviews the toxicity of all the metals of the periodic table on the basis of available relevant data. Books on pharmacological, nutritional, medical, veterinary, or industrial toxicity contain information about selected metals. More complete data about metals of public concern, such as mercury, lead, and cadmium, may be found in numerous books and reviews. The reader should refer to general texts and basic reference works, when specific references are not given, for general information.
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 730
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Book Description
Author: U. Lüttge
Publisher: Springer Science & Business Media
ISBN: 3642662277
Category : Science
Languages : en
Pages : 434
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Book Description
As plant physiology increased steadily in the latter half of the 19th century, problems of absorption and transport of water and of mineral nutrients and problems of the passage of metabolites from one cell to another were investigated, especially in Germany. JUSTUS VON LIEBIG, who was born in Darmstadt in 1803, founded agricultural chemistry and developed the techniques of mineral nutrition in agricul ture during the 70 years of his life. The discovery of plasmolysis by NAGEL! (1851), the investigation of permeability problems of artificial membranes by TRAUBE (1867) and the classical work on osmosis by PFEFFER (1877) laid the foundations for our understanding of soluble substances and osmosis in cell growth and cell mechanisms. Since living membranes were responsible for controlling both water movement and the substances in solution, "permeability" became a major topic for investigation and speculation. The problems then discussed under that heading included passive permeation by diffusion, Donnan equilibrium adjustments, active transport processes and antagonism between ions. In that era, when organelle isolation by differential centrifugation was unknown and the electron microscope had not been invented, the number of cell membranes, their thickness and their composition, were matters for conjecture. The nature of cell surface membranes was deduced with remarkable accuracy from the reactions of cells to substances in solution. In 1895, OVERTON, in U. S. A. , published the hypothesis that membranes were probably lipid in nature because of the greater penetration by substances with higher fat solubility.
Author:
Publisher:
ISBN:
Category : Environmental health
Languages : en
Pages : 1044
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309029325
Category : Nature
Languages : en
Pages : 428
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Book Description
The most recent volume in the Drinking Water and Health series contains the results of a two-part study on the toxicity of drinking water contaminants. The first part examines current practices in risk assessment, identifies new noncancerous toxic responses to chemicals found in drinking water, and discusses the use of pharmacokinetic data to estimate the delivered dose and response. The second part of the book provides risk assessments for 14 specific compounds, 9 presented here for the first time.
Author: United States. Environmental Protection Agency. Library Systems Branch
Publisher:
ISBN:
Category : Environmental protection
Languages : en
Pages : 702
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Book Description
