Sousa W de O, Dantas B M, Lipsztein J L
Instituto de Radioproteção e Dosimetria-Comissão Nacional de Energia Nuclear, Av. Salvador Allende s/n, Via 9, Recreio, CEP 22780-160, Rio de Janeiro, RJ, Brazil.
Radiat Prot Dosimetry. 2003;105(1-4):487-90. doi: 10.1093/oxfordjournals.rpd.a006287.
Potassium is an essential element for human metabolism. It is present in all living cells, predominantly in the skeletal muscle tissue. The energy of the 40K photon and its uniform distribution within the human body allow its in vivo measurement. Subjects of both sexes were monitored at the whole-body counter of the IRD facility for the evaluation of 40K body burden, being divided into two groups: (1) subjects who do not exercise routinely, and (2) subjects who do exercise routinely. The average values found for potassium mass and potassium concentration in group 1 were 99 +/- 17 g of K and 1.3 +/- 0.2 g of K kg(-1) of body mass, respectively, and in group 2 the average values found for potassium mass and potassium concentration were 118 +/- 33 g of K and 1.6 +/- 0.2 g of K kg(-1) of body mass, respectively. The comparison between average values for potassium mass and concentration shows a significant statistical difference.
钾是人体新陈代谢所必需的元素。它存在于所有活细胞中，主要存在于骨骼肌组织中。40K光子的能量及其在人体内的均匀分布使其能够在体内进行测量。在IRD设施的全身计数器上对两性受试者进行监测，以评估40K身体负荷，受试者被分为两组：（1）不经常锻炼的受试者，（2）经常锻炼的受试者。第1组中钾质量和钾浓度的平均值分别为99±17g钾和1.3±0.2g钾/千克体重，第2组中钾质量和钾浓度的平均值分别为118±33g钾和1.6±0.2g钾/千克体重。钾质量和浓度平均值之间的比较显示出显著的统计学差异。
