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P Joyce

Publications and source records attributed to P Joyce.

45 records · Page 3Linked to original sources
PubMed1979

Sex differences in the association of cerebral hemispheric specialization of spatial function with conservation task performance.

The association of locus of cerebral hemispheric specialization of spatial function with identity and equivalence conservation judgments was tested in a group of 4- to 6-year-old right-handed children (N = 31). Separate multiple regression analyses for males and females revealed that locus of specialization of spatial function was irrelevant for performance on the equivalence conservation task but was a significant factor in male identity conservation performance. Whereas right hemisphere specialization was advantageous for males, it was of no significant import for females. Results are discussed in the light of previous research on the use of differing cognitive stratergies by males and females in problem-solving situations.

Child↗
PubMed1978

The accuracy of predicting histologic grades of supratentorial astrocytomas on the basis of computerized tomography and cerebral angiography.

This report concerns a group of 49 patients who had been diagnosed as having gliomas on the basis of CT scans plus angiograms and for whom histologic proof was available. Ninety percent were found to be gliomas, 4% were metastases, and histology was unclear in the rest. Combining the CT criteria of inhomogeneous enhancement and surrounding edema with one or more of three angiographic signs (early venous drainage, stain, abnormal vessels) allowed a more confident diagnosis of glioblastoma.

Astrocytoma↗
PubMed1973

Characterization of alternative molecular forms of xanthine oxidase in the mouse.

1. Two major forms of xanthine oxidase are demonstrated for the mouse. On polyacrylamide-gel electrophoresis the duodenal form migrates faster towards the anode than that of the liver. Both forms also differ in their (NH(4))(2)SO(4) precipitation patterns and sucrose-density-gradient molecular-weight determinations. 2. The liver form is fully converted into the duodenal form by incubation at 37 degrees C with 2.5mg of crude trypsin/ml for 1(1/2)h, without loss of activity. The trypsin-treated liver form behaves like the normal duodenal form as characterized by electrophoresis, (NH(4))(2)SO(4) precipitation patterns, and sucrose-density-gradient molecular-weight determinations. 3. Partial conversion is also brought about by purified trypsin and chymotrypsin, but not with beta-carboxypeptidase or lipase. The conversion is inhibited by soya-bean trypsin inhibitor. 4. In embryo mice the duodenal form is similar to the liver form on electrophoresis. 5. These studies indicate, as might be expected, that the duodenal form is a modified version of the liver enzyme, probably caused by proteolytic alteration.

Animals↗
PubMedDate not supplied

Basket removal of intraatrial catheter after liver transplantation: technical note.

A fragment of an intravenous catheter, lodged in the right atrium of a patient after a recent liver transplant, was removed percutaneously. Extra care is needed in such patients if the transfemoral approach is used. Reasons for the additional precautions are discussed and a case history is provided.

Cardiac Catheterization↗