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Biomedical subjects

J Smith

Publications and source records attributed to J Smith.

At least 1,297 records · Page 72Linked to original sources
PubMed1980

Recurrent subluxation and dislocation of the patella in association with athletic injuries.

Seventy-one patients with 81 operations for correction of patellar instability are reviewed. Follow-up was for at least five years. The various preoperative symptoms, signs, and radiographic findings are presented. Two types of patellar instability become clear. One type is usually bilateral and secondary to general ligamentous laxity. A second type, usually unilateral with distinct physical findings, is secondary to trauma. The operative technique and results of surgery and physical therapy are discussed. A new rational approach to the operative treatment of recurrent subluxation and dislocation of the patella is proposed. The operative procedure would depend on the Q angle. For a Q angle of less than 14 degrees, a proximal realignment is sufficient. For a Q angle greater than 14 degrees, a distal realignment would be necessary in addition.

Athletic Injuries↗
PubMed1979

The nature of the copper atoms of cytochrome c oxidase as studied by optical and x-ray absorption edge spectroscopy.

X-ray absorption edge spectroscopy has been used to study the copper of 1--2 mM cytochrome c oxidase in the resting oxidized, mixed-valence, and fully reduced states. A comparison was made of this protein with copper complexes and with natural and artificial copper proteins. Spectra were obtained with synchrotron radiation from the SPEAR storage ring using highly sensitive fluorescence detectors. Temperatures of -80 to -120 degrees C were employed further to improve the stability of the samples and to avoid the possibility of either auto- or photon-induced reduction of the materials, which might have occurred in previous studies. In order to characterize the valence states of the Cu and Fe components, the samples were monitored by infrared and visible spectroscopy before and after irradiation by the X-ray beam. The combination of the optical and X-ray absorption techniques has afforded a deconvolution of the four species of copper in the various states of cytochrome c oxidase and the tentative assignment of Cu alpha, the copper redox coupled to the heme alpha of cytochrome alpha, as a highly covalent type of copper and Cu alpha 3, the copper of cytochrome alpha 3, as a more ionic 'blue' type I copper. The implications of these findings upon the mechanism of action of cytochrome oxidase are briefly outlined.

Absorptiometry, Photon↗
PubMed1979

Ageing Britain: how long must workers continue to wait in hope?

Despite frequent demands for better trained care staff for the elderly, residential workers are still considered the poor relations of social workers. Author looks at the reasons for this low status and urges care staff radically to review the way they see their role.

Aged↗