Physical characterization of the hair of Mexican women.

Hairs collected from 257 Mexican women, residing in Mexico City, were characterized by instrumental measurements for comparison to more-commonly reported Caucasian, Asian and African hairs. Subjects were subdivided into five age groups and their hairs were characterized by fibre dimension, shape and tensile strength. Results show that Mexican hair appears to be intermediate of Asian and Caucasian hair in diameter and cross-sectional ellipticity. Such findings seem in line with the early and late ethnic origins of Mexican people. Results also illustrate and confirm the large intra- and inter-individual variability within any single hair property. Unexpectedly high levels of hair tensile damage were sometimes encountered.

Des cheveux prélevés sur 257 mexicaines, résidant dans la ville de Mexico, ont été mesurés et comparés avec des cheveux caucasiens, asiatiques et africains, généralement mieux connus. Les sujets ont été répartis en 5 catégories d'âge et leurs cheveux caractérisés selon la dimension de la fibre, leur forme et leur résistance mécanique. Les résultats montrent que les cheveux mexicains se situent, en termes de diamètre et d'ellipticité, entre les asiatiques et les caucasiens. Cela semble en cohérence avec les origines ethniques récentes et anciennes du peuple mexicain. Les résultats illustrent aussi et confirment la grande diversité intra et inter individu pour toutes les propriétés du cheveu. Des cheveux anormalement fragiles lorsque soumis à un test de tension ont parfois été rencontrés.

[Clinical and experimental grounds for the method of spontaneous respiration with difficult exhalation (lung inflation) in children]. / K klinicheskomu i eksperimental'nomu obosnovaniiu metodiki spontannogo dykhaniia s zatrudnennym vykhodom (razduvaniia legkikh) u detei

Three methods of inducing difficulty in breathing out in spontaneous ventilation are described: by means of a valve attached to an intubation tube (I), with a polyethylene sac secured hermetically on patient's head and connected to a source of oxygen (2), and also with the help of a low-pressure chamber for patient's body (3). Experiments and clinical observations (40 therapeutic seances in 23 children aged from 1 day to 7 years) have evidenced that this method is mostly more advantageous than artificial ventilation, it is highly efficient in treatment of aspiration pneumonia and pulmonary edema, also it may be used with prophylactic purposes following aspiration, artificial ventilation, in the immediate postoperative period, and after hyperbaric oxygenation.

[Effect of E. coli endotoxin on the amount of 2,3-diphosphoglycerate in rabbits]. / Vliianie na endotoksin ot E. coli vurkhu kolichestvoto na 2,3-difos-foglitserata pri zaitsi.

Fifteen rabbits were injected i/p with an endotoxin at the rate of 6 mg each. Studied were the amounts of 2,3-diphosphoglycerate (DPG), hemoglobin, and erythrocytes in the blood 1, 2, 2.5, and 3 hours following treatment. A clearly manifested lowering trend was observed with the level of hemoglobin up to the 3rd hr. The changes concerning DPG and the erythrocytes also consisted in lowering their values, which was more strongly expressed with DPG than with Hb, reaching its lowest values 2.5 hours following treatment. From that moment on a rise was noted with the values of DPG and erythrocytes. The changes that set in with the latter had no effect on the DPG/Hb coefficient, their being a lowering of its values up to the 2nd hour, whereas from the 2nd to the 3rd hour there followed a rise. The rise of the DPG and the DPG/Hb values after the 2.5 and the two hours respectively, was referred to as a compensatory mechanism through which the body lowered the level of hypoxia, developing under the effect of the E. coli endotoxin.