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Biomedical subjects

J Peter

Publications and source records attributed to J Peter.

102 records · Page 6Linked to original sources
PubMed1966

Activity of the human eccrine sweat gland during exercise in a hot humid environment before and after acclimatization.

1. Six unacclimatized African mine labourers were subjected to exercise for 4(1/2) hr in a hot humid environment (90 degrees - 93 degrees F wet-bulb/dry-bulb (W.B./D.B.); approximately 90% r.h.) 2. The patterns of glandular activity and the densities of active glands on the chest and back were assessed half-hourly from plastic impressions. Acclimatization increased and prolonged glandular activity. The increment in activity of the sweat glands on the back was greater than that on the chest. 4. There was no significant increase in the maximum number of active glands on either site after acclimatization. 5. Acclimatization greatly reduced the number of inactive glands, subsequent to the maximum count, on the back, but this was not observed on the chest. 6. The increased sweat rates with acclimatization were due mainly to increased glandular activity. 7. The decline in sweat rates and activity on prolonged exposure to hot humid environment was attributed to glandular fatigue. Other factors, such as increased body temperature, hydration of the skin and fatigue of the central nervous system, suggested by other investigators as possibly causing the decline in sweat rates, did not have support in this study.

Acclimatization↗
PubMedDate not supplied

Amebic abscess of the liver manifested by "hemoptysis": US, CT, and MRI findings.

Ultrasonographic (US), computed tomographic (CT), and magnetic resonance imaging (MRI) findings of a patient suffering from an amebic abscess of the liver complicated by a bronchohepatic fistula are presented. Subsequent to US, CT provided the specific diagnosis. Multiplanar MRI was valuable to directly visualize the secondary diaphragmatic rupture and the bronchohepatic fistula.

Bronchial Fistula↗
PubMedDate not supplied

Surface proteins of Staphylococcus aureus.

Crude cell walls of Staphylococcus aureus of potential immunologic or epidemiologic importance were prepared for study by mechanically disrupting whole cells and applying differential centrifugation. Cell-wall proteins were then released from the wall by lysostaphin digestion and analyzed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Distinct electrophoretic protein patterns were found for each of the 12 serologically distinct strains examined. There were two major groups of cell-wall proteins identified in the 45-57-kilodalton (kdal) and 100-190-kdal range, respectively. Proteins in the 45-57-kdal range appeared to represent protein A variants of different apparent molecular mass. Localization experiments with 125I labeling demonstrated the surface location of most of the proteins. These data suggest that selected surface-exposed proteins may be important in defining host immune responses to S. aureus infections.

Autoradiography↗
PubMedDate not supplied

Antimicrobial prophylaxis for fractured base of skull in children.

The details are reviewed of 50 children who were treated over a 10-year period with clinical signs of fractured base of skull. Two patients died early without signs of sepsis--due to the severity of their head injuries. Of the remainder, 23 received antibiotic prophylaxis and 25 did not. One patient from each of these groups developed pneumococcal meningitis, and they were successfully treated. Our results correlate well with those previously published, confirming the low incidence of infective complications with or without prophylaxis. The need to assemble a large enough series to make statistically significant conclusions regarding this infrequent condition is highlighted throughout the literature, which is reviewed here.

Cerebrospinal Fluid Otorrhea↗