Concentration homeostasis and elements in hair and dried serum observed by X-ray fluorescence analysis using synchrotron radiation.

摘要: Elemental concentrations in hair and dried serum have been evaluated by X-ray fluorescence analysis using relative concentration independent of specimen thickness. Dried samples from 5 male female subjects given two-week Ca supplementation showed the same for Ca, each other elements Cl, K, S P under renal control parathyroid hormone (PTH). Hair these 50 randomly-selected females aged between 30 80. It was found that element has two distinct levels hair. The content an growing must be equal to inflow into hair-making cells serum. Using this principle, can attributed gating closing ion channels cell membranes as functions standard concentrations. Especially, difference [Ca] [Sr] shows whether are or closing. lower level _H is normal 1/2 [Ca]; only on protein incorporated steady-state growth. Store-operated channel occurs so maintain . higher seen cases calcium deficiency, implicated disease states. Prolonged deficiency causes a with PTH-operated induces ^{2+} form upper deteriorate such excretion excess metals hepatocytes. provides new diagnostic tool based channels.