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Potassium is the most abundant intracellular cation and about 98% of the body's potassium is found inside cells, with the remainder in the extracellular fluid including the blood. Membrane potential is maintained principally by the concentration gradient and membrane permeability to potassium with some contribution from the Na+/K+ pump .
Between 1% and 15% of people globally are affected by renal calculi at some point in their lives. [8] [11] In 2015, 22.1 million cases occurred, [5] resulting in about 16,100 deaths. [6] They have become more common in the Western world since the 1970s. [8] [12] Generally, more men are affected than women.
In 2002, there were about 57 million deaths. In 2005, according to the World Health Organization (WHO) using the International Classification of Diseases (ICD), about 58 million people died. [1] In 2010, according to the Institute for Health Metrics and Evaluation, 52.8 million people died. [2]
This page lists radioactive nuclides by their half-life.
An estimated 800 million children have blood lead levels over 5 μg/dL in low- and middle-income nations, though comprehensive public health data remains inadequate. [14] Thousands of American communities may have higher lead burdens than those seen during the peak of the Flint water crisis. [15] Those who are poor are at greater risk. [2]
Potassium alum, potash alum, or potassium aluminium sulfate is a chemical compound first mentioned under various Sanskrit names in Ayurvedic medicinal texts such as charak samhita, sushrut samhita, and ashtang hridaya; is chemically defined as the double sulfate of potassium and aluminium, with chemical formula KAl(SO 4) 2.
These compounds are over 200 times more electrically conductive than pure graphite, suggesting that the valence electron of the alkali metal is transferred to the graphite layers (e.g. M + C − 8). [65] Upon heating of KC 8, the elimination of potassium atoms results in the conversion in sequence to KC 24, KC 36, KC 48 and finally KC 60.
8-inch floppy disk, inserted in drive, (3½-inch floppy diskette, in front, shown for scale) 3½-inch, high-density floppy diskettes with adhesive labels affixed The first commercial floppy disks, developed in the late 1960s, were 8 inches (203.2 mm) in diameter; [4] [5] they became commercially available in 1971 as a component of IBM products and both drives and disks were then sold ...