毛髮ノ強力及ビ伸展性ニ關スル研究 : 第2編諸種處置後ノ毛髮ノ強力及ビ伸展性ニ就テ

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The author observed the influence of various treatments upon the stress and elongation of a single normal hair by the same method as described in the previous paper. The results obtained by him were as follows: 1) The hairs were soaked in various fluids and the stress and the elongation percentage were measured 15, 30, 60, 120, 180, 480 and 1440 minutes respectively after the soaking and compared with those not treated. a) The stress and the elongation percentage of the hair, when soaked in distilled water or city water respectively at 37°, 55° and 100℃, became greater with time within three hours and thereafter became smaller with time. b) The stress and elongation percentage of the hairs, soaked in alcohol of 10, 30, 70 and 90% respectively, were greater than the normal untreated ones during the first 24 hours. The elongation percentage, however, became a little smaller after 24 hours. c) The stress and the elongation percentage of the hairs treated with chloroform or ether remained nearly unchanged for the first 24 hours. After that period, the former decreased but little, while the latter decreased a fair amount. d) The stress and the elongation percentage of the hair soaked in yellow vaseline, glycerine, liquid paraffin, or machine-oil remained nearly normal for the first 24 hours. Thereafter they decreased a fair amount. e) When the hair was treated with vegetable oil, such as olive oil, linseed oil, camellia oil or rape-seed oil, the stress and the elongation percentage were found to have increased, when tested at any period within the first 24 hours. Afterwards, the stress remained unchanged, while the elongation percentage decreased a little. f) The stress and the elongation percentage of the hair soaked in cod-liver oil remained unchanged during 24 hours. The stress seemed not to change at all, while the elongation percentage decreased a little. g) The stress and the elongation percentage of the hair treated with hairtonic, such as "Yohmotonic", "Kemmosui", "Vitaol", "Bijinkadzura" and "Petrol hahn", remained unchanged during 24 hours. After that period, the stress continued in nearly the same condition, while the elongation percentage decreased to a certain extent. h) The stress and the elongation percentage of the hair soaked in shampoo lotion such as "Modern Araiko" "Kao Shampoo", decreased little within and after 8 hours. i) The stress and the elongation percentage of the hair treated with laundry soap or toilet soap at 40℃, were nearly the same as the untreated ones within and after 8 hours. j) The treatment with hair-dye lotion such as "Nice", "Ruriba" caused a slight decrease of the stress within one hour. It caused a greater decrease after 24 hours, while it did not cause any notable change of the elongation percentage throughout the course of the observation. k) Those soaked in a 0.2N Solution of NaOH showed greater stress than the normal within 2 hours, but they showed a slightly smaller stress after 3 hours and a fairly smaller stress after 24 hours. Those soaked in a 0.2N Solution of KOH showed greater stress after 15 minutes lasting for 24 hours. As for the elongation percentage it was a little smallerr than the untreated one for 3 hours, but after 24 hours it decreased to a fair extent. 1) The stress of the hair soaked in a 0.2N solution of H_2SO_4 was greater than that of the normal one throughout the observation, while the elongation percentage was fairly small throughout the observation. m) The soaking in 0.2Mol solution of NaCl, KCl, LiCl, MgCl_2, CaCl_2 caused a decrease of the stress for the first 2 hours and an increase of it at the end of the 3rd hour. The value of the elongation percentage was nearly the same as that of the control, but some cases were a little lower than the control. 2) The hairs were put on a piece of ice in an ice-box and the stress and the elongation percentage were measured 15, 30, 60, 120, 180, 1440 minutes and 3 weeks after. The stress remined nearly the same as that of the control for 3 hours, and thereafter continued to decrease a little, even at the end of the 3rd week. The elongation percentage, on the contrary, was smaller than that of the control for 3 hours, while after 24 hours and even after 3 weeks it was much greater than that of the control. 3) The hairs were put in a drying oven at 120° and 150℃ respectively and the stress and the elongation percentage were measured after 15, 30, 60, 120 and 180 minutes. The stress value was nearly the same as that of the control, but decreased greatly after 6 hours. The elongation percentage showed a very low value from the beginning of the examination till the end. These changes were, of course, more notable at the higher temperature. 4) 15 minutes irradiation of ultraviolet-rays caused a slight decrease of the stress and 50 minutes irradiation caused a great decrease. As for the elongation percentage, it decreased considerably after 30 minutes irradiation. Those changes were more noticeable in the case of the irradiation of short waved ultraviolet-rays (carbon c) than in the case of long waved ultraviolet-rays (carbon A). 5) The irradiation of X-ray (stabilivolt, dose 120KV, 2mA, 204-205% H.E.D) caused a slight decrease of both the stress and the elongation percentage. The irradiation of X-ray (dose 160KV, 3mA, 205-210% H.E.D) caused a great decrease of the stress and a small decrease of the elongation percentage. 6) The friction of the hairs brought about by the rotation of bobbins under various conditions or of a glass tube, caused a decrease both of the stress and of the elongation percentage. The higher the friction effect, the greater decrease of the stress and the elongation percentage. The effect of the friction of the tested instruments, from the highest to the lowest, was arranged on the following scale: Oiled bobbin (camellia-oil), Glass tube, dried bobbin, bobbin covered with woollen cloch. 7) The hairs treated with a curling-iron which did not cause any colouring of the test paper showed greater stress than that of the control. The treatment with a curling iron which coloured a test paper a sepia tint caused much decrease of the stress. As for the elongation percentage, it was a little smaller than that of the control. 8) The hairs were put into ordinary dermatological preparations of varisus kinds, each for 24 hours, 3 days and 7 days, and then they were taken out and tested. The stress of those put into lanolinpasta, boric vaselin and rivanol-zincointment was greater, and that of those put into borzinc-ointment, trypaflavinointment, carbolzinc-liniment, was smaller than that of the control. The elongation percentage of those put into lanolinpasta, boricvaselin, rivanolzine ointment, was greater and that of those put into boriczinc ointment, tripaflavin ointment was nearly the same as that of the control, while that of those put into carbolzinc liniment was much lessened.
京都府立医科大学の論文

著者

笹木武雄
京都府立醫科大學

毛髮ノ強力及ビ伸展性ニ關スル研究 : 第2編諸種處置後ノ毛髮ノ強力及ビ伸展性ニ就テ

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毛髮ノ強力及ビ伸展性ニ關スル研究 : 第2編 諸種處置後ノ毛髮ノ強力及ビ伸展性ニ就テ

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毛髮ノ強力及ビ伸展性ニ關スル研究 : 第2編諸種處置後ノ毛髮ノ強力及ビ伸展性ニ就テ