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The daily variation of serum levels of prostate-specific antigen (PSA) and prostatic acid phosphatase (PAP) was investigated simultaneously in 10 patients with osseous metastatic prostatic cancer, 10 patients with benign prostatic hyperplasia, and 10 volunteers without prostatic disease. Duplicate serum samples were obtained from all patients on the same(More)
Cross-sections and angular distributions for hadronic and lepton pair final states in e + e − collisions at a centre-of-mass energy near 189 GeV, measured with the OPAL detector at LEP, are presented and compared with the predictions of the Standard Model. The results are used to measure the energy dependence of the electromagnetic coupling constant α em ,(More)
Photosensitization of erythrocytes in the presence of hematoporphyrin derivative causes cross-linking of membrane proteins. This cross-linking is associated with partial lysis of the cells and an increased susceptibility to heat-induced membrane fragmentation. The effect of photosensitization on the organization of erythrocyte band 3 was monitored using the(More)
Invasion of human erythrocytes by Plasmodium falciparum is inhibited by chymostatin. This suggests that digestion of erythrocyte surface proteins by a protease with chymotrypsin-like activity may be involved in the invasion process. We find that treatment of intact erythrocytes with chymotrypsin cleaves the integral membrane protein, band 3, generating a(More)
Human erythrocyte band 3 was covalently labeled within the integral membrane domain by incubating intact erythrocytes with the phosphorescent probe eosinyl-5-maleimide. The rotational diffusion of band 3 in membranes prepared from these labeled cells was measured using the technique of time-resolved phosphorescence anisotropy. Three rotational correlation(More)
Production of events with hadronic and leptonic final states has been measured in e + e − collisions at centre-of-mass energies of 130–172 GeV, using the OPAL detector at LEP. Cross-sections and leptonic forward-backward asymmetries are presented, both including and excluding the dominant production of radiative Zγ events, and compared to Standard Model(More)
A search for pair produced scalar fermions with couplings that violate R-parity has been performed using a data sample corresponding to an integrated luminosity of 56 pb −1 at a centre-of-mass energy of √ s = 183 GeV collected with the OPAL detector at LEP. An important consequence of R-parity breaking interactions is that the lightest supersymmet-ric(More)
Measurements of time-resolved phosphorescence anisotropy were used to monitor the rotational diffusion of eosin-labeled band 3 in membranes of the elliptocytic erythrocytes of alpacas and camels. The rotational freedom of camelid band 3 was more restricted than for human band 3. Removal of the peripheral membrane proteins from human erythrocyte membranes,(More)
We have searched for decays of the τ lepton into seven or more charged particles, using data collected with the OPAL detector from 1990 to 1995 in e + e − collisions at √ s ≈ M Z. No candidate events were found and an upper limit on the branching ratio for τ decays into seven charged particles of 1.8 × 10 −5 at the 95% confidence level was determined.