Borisov I M
Vopr Pitan. 1977 Nov-Dec(6):43-6.
In 227 students of the Institute for Physical Culture examined in the winter-spring and summer-fall seasons of the year, the passage of N1-methylnicotinamide (MNA) with urine per hour on an empty stomach amounted to 245 +/- 15.9 and 311 +/- 14.6 microgram/hour (the difference according to seasons in significant). These figues point to the dependence of the MNA excretion with uridine on the quantity of the niacin equivalents supplied together with the food. The content of such equivalentsin the rations of students-sprotrsmen (7-9.5 mg per 1000 calories per day) proved insufficient to maintain the MNA passage with urine at a level accepted as a standard allowance of niacin for the organism, i. e. 400-500 microgram/hour. Furthermore, the author shows changes in the niacin allowances of the student's organism, engaged in different kinds of sporting activities and also depending upon the sporting qualification of the examinees the work performed by them, the periods of training, and conditions of their every-day life.
在该体育学院的227名学生中，于冬春和夏秋季节进行检查，空腹时每小时尿中N1-甲基烟酰胺（MNA）的排出量分别为245±15.9和311±14.6微克/小时（季节差异显著）。这些数据表明，尿中MNA的排泄量取决于食物中所提供的烟酸当量的数量。学生运动员（每天每1000卡路里7-9.5毫克）饮食中此类当量的含量被证明不足以将尿中MNA的排出量维持在被视为机体烟酸标准摄入量的水平，即400-500微克/小时。此外，作者还展示了从事不同体育活动的学生机体烟酸摄入量的变化情况，以及还取决于受检者的运动资格、他们所从事的工作、训练周期以及日常生活条件。
