In the present work I determined lactic acid content of milk sam-ples, taken from both breasts of 200 lactating mothers, by T s u k a z a-ki's
11) micro method, and obtained the following results:-
1. Lactic acid content of the Arakawa-positive milk showed an average of 8.7mgrms. % and the Arakawa-negative milk an average of 13.7 mgrms. %, while that of all the milk samples showed an aver-age of 12.2mgrms. % (Cf. Table 10). The average of the values of Arakawa-negative milk is larger by about 57% than that of Arakawa-positive milk (Cf. Table 10). Generally speaking, the more remarka-ble the degree of negativity is, the larger is the lactic acid content (Cf. Tables 10 and 11).
2. As stated above, Arakawa-negative milk is generally abun-dant in lactic acid, while Arakawa-positive milk is generally poor in it. Now, in mothers with different A r a k a w a's reaction on both breasts-, for instance, in mothers with Arakawa-positive milk on the right and with Arakawa-negative milk on the left-, the same rule applies. But in such mothers an average of the lactic acid content on the positive side (10.2mgrms. %) is larger than that in mothers with milk of the same positivity on both breasts (7.9 mgrms. %), as has been shown in Table 12 A. And in mothers with completely Araka-wa-negative milk on only one breast, aiaverage of the lactic acid con-tent of that negativity (14.5mgrms. %) is slightly lower than that in mothers with milk of the same negativity on both breasts (15.2mgrms. %), as has been shown in Table 12 B.
3. In mothers with very different reaction on different breasts, the general rule between lactic acid content of milk sample and Arakawa's reaction applies generally (Cf. Table 13 A and B). But in such mothers, an average of the lactic acid content of the Arakawa-positive side (11.6mgrms. %) is remarkably higher than that of mothers with the same positivity on both breasts (7.9mgrms. %), and slightly higher than that of mothers with the same positivity on only one breast (10.2mgrms. %), as has been shown in Tables 12 A and 13 A. And in such mothers, an average of the lactic acid content of the com-pletely Arakawa-negative side (14.8mgrms. %) is slightly lower than that of mothers with the same negativity on both breasts (15.2mgrms. %), and almost the same as that of mothers with the same negativity on only one breast (14.5mgrms. %), as Table 13 A and B show.
4. Among cases of the same intensity of Arakawa's reaction, lactating mothers with vitamin B intake showed generally a lower value of lactic acid content of milk than those without it (Cf. Table 10 of Part 1 and Table 6 of Part 2).
5. Lactic acid content both of Arakawa-positive and -negative milks showed a slight increase as the age of mothers advanced (Cf. Table 7).
6. Lactic acid content both of Arakawa-positive and -negative milks showed the highest value in the 1st month of the delivery. From the 2nd month of lactation the content decreased somewhat suddenly both in Arakawa-positive and -negative milks. Then it kept almost constant up to the 12th month of lactation, and then it increased again, especially so in Arakawa-positive milks, though it did not attain so high a value as within the 1st month of the delivery (Cf. Table 8).
7. An average of the values of lactic acid content both of Ara-kawa-positive and -negative milks was higher in the group of infants, subsidiarily breast-fed, than in the group of infants exclusively breast-fed, especially so in ones nursed with Arakawa-positive milk (Cf. Table 9).
8. An average of the value of lactic acid content of both Araka-wa-positive and -negative milks was larger in spring and summer than in autumn and winter, and the highest in summer. The fluctuation range between the maximum and the minimum values of both Araka-wa-positive and -negative milks was wider in spring and summer than in autumn and winter. It was the widest in summer (Cf. Table 14).
抄録全体を表示