1,721,486 research outputs found
The interaction of the polyene antibiotic lucensomycin with cholesterol in erythrocyte membranes and in model systems. II. Cooperative effects in erythrocyte membranes.
No full textFluorometric titration curves of erythrocyte membranes with increasing lucensomycin have a sigmoid shape. This behavior, which was not present when colloidal cholesterol suspensions were used, is, however, not peculiar to the membrane structure, being also present in cholesterol-containing phospholipid micelles. Addition of acetic acid induced or increased sigmoidicity. This behavior can either be due to a true cooperativity in binding or to different fluorescence yields of the various lucensomycin-membrane complexes. The latter hypothesis appears to be slightly favored
RECURRENT ARTERIOVENOUS MALFORMATION IN AN ADULT; CASE ILLUSTRATION
No full textWe present the case of an adult with a cerebral arteriovenous malformation (AVM) that recurred 6 years after complete surgical extirpation. This 24-year-old man underwent surgery for a Spetzler-Martin Grade I AVM located in the right posterotemporal region, which was discovered during investigation of complex partial seizures
SPONTANEOUS OCCLUSION OF SUPRACLINOID ANEURYSM AFTER CREATION OF EXTRA-INTRACRANIAL BYPASSES USING LONG GRAFTS: REPORT OF TWO CASES
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Spontaneous occlusion of a supraclinoid aneurysm after extra-intracranial by-pass using a long graft: report 2 cases
No full textCerebellar mutism after posterior cranial fossa surgery.
No full textMutism is a rare sequel of PCF tumor removal. Three patients aged 5 to 20 years old with mutism after posterior fossa surgery are presented. Suboccipital craniectomy was performed in all patients with grossly total removal of a medulloblastoma. The mutism that may occur after an operation for a PCF lesion has been explained in functional and/or organic terms. To date, 24 similar cases of mutism following cerebellar operations have been reported in the literature. We review the features of the syndrome in the light of the published cases and speculate on the underlying physiopathology. The absence of long tract or other brain stem signs, together with a presence of dysarthria during the recovery of speech, suggested a organic cerebellar cause of the mutism
Spontaneous regression of a thoracic calcified disc herniation in a young female: A case report and literature review
No full text[No abstract available
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