Journal ArticleDOI
Lysis of erythrocytes by silicate minerals
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In vitro studies of the destruction (lysis) of bovine red blood cells (erythrocytes) by some silicate minerals showed the reaction to be complete in less than 1 hr and very destructive to the cell membrane.Abstract:
In vitro studies of the destruction (lysis) of bovine red blood cells (erythrocytes) by some silicate minerals showed the reaction to be complete in less than 1 hr and very destructive to the cell membrane. The activity as lysing agents was found to be in the order smectites > silica > palygorskite -~ sepiolite > chrysotile > kaolinite. Different compositions (Fe, A1, Mg, Li, vacancy) of the octahedral sheet of the smectite and fibrous clay minerals did not appreciably alter their hemolytic activity. The most active particle size range for kaolinite and montmoriUonite was 0.2-2 ~m. Structural folding of palygorskite reduced lysis suggesting that edge surfaces and silanol groups are important in this process. Aluminum oxides and hydroxides caused no lysis, and coatings of positively charged aluminum-hydroxy polymers on montmorillonite, silica, palygorskite, and kaolinite significantly reduced lysis.read more
Citations
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Journal ArticleDOI
Properties and applications of palygorskite-sepiolite clays
TL;DR: In this article, a revision of the principal characteristics of commercial palygorskite-sepiolite clays is presented, and potential uses are suggested according to these data.
Journal ArticleDOI
Fibrous clays based bionanocomposites
Eduardo Ruiz-Hitzky,Margarita Darder,Francisco M. Fernandes,Bernd Wicklein,Ana C. S. Alcântara,Pilar Aranda +5 more
TL;DR: In this article, the authors introduce recent results from sepiolite and palygorskite-based bionanocomposites showing the interest of these silicates compared to lamellar clays for diverse applications such as bioplastics and membranes, uses in biomedicine as drug delivery systems and adjuvants of vaccines as well as in tissue engineering.
Book ChapterDOI
Chapter 11.5 Clays and Human Health
TL;DR: In the lung, clay minerals can cause diverse pathologies such as cancer, mesothelioma, or pneumoconiosis, but the toxicity of these minerals is generally related to the presence of quartz or asbestos from mining operations.
Book ChapterDOI
Clays, Drugs, and Human Health
TL;DR: Inside the lung, clay minerals can cause diverse pathologies such as cancer, mesothelioma, or pneumoconiosis, but the toxicity of these minerals is generally related to both the presence of quartz or asbestos from mining works, or with the geological conditions of formation.
References
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Journal ArticleDOI
The preparation and chemical characteristics of hemoglobin-free ghosts of human erythrocytes
TL;DR: The effects of the ionic strength and pH of the hemolyzing solution on the hemoglobin content of human erythrocyte ghosts were studied in phosphate buffers and suggest an electrophysical interaction of hemoglobin with membrane constituents.
Book ChapterDOI
Chemical Identification of Surface Groups
TL;DR: The surface properties of a surface are influenced by the surface groups and the knowledge of their existence and of their chemistry are important for many technological processes as mentioned in this paper, which is why it is important to have knowledge of these surface groups.
Book
Textbook Of Biochemistry
Edward S. West,Wilbert R. Todd +1 more
TL;DR: Textbook of biochemistry , Textbook ofBiochemistry , مرکز فناوری اطلاعات و اصاع رسانی, کδاوρزی