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  • 1
    ISSN: 1569-8041
    Keywords: Hodgkin's disease ; immunohistochemistry ; in situ hybridization ; liver transplantation ; post-transplant lymphoproliferative disorder
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Here we describe the case of a 14-year-old boy who underwent livertransplantation for post-Kasai biliary atresia when aged 4. Antirejectiontreatment consisted of prednisone and cyclosporine. At the age of 11 years thepatient developed left cervical lymphadenopathy; the biopsy showed classicalHodgkin's disease(HD) of the mixed cellularity (MC) type. Neoplastic cellsexpressed CD30 and CD15, and were negative for CD45, CD20, CD3, CD43, andCD79a. Furthermore, they carried the EBV-related products LMP1 and EBER1/2.Treatment consisted of three cycles of adriamycin, bleomycin, vinblastine andDTIC (ABVD), followed by radiotherapy (2,000 cGys) on involved fields. Atpresent, 42 months after the diagnosis of HD, the patient is still in completeremission. This is, to the best of our knowledge, the first reported case ofclassical HD following liver transplantation. The positivity of neoplasticcells for LMP1 and EBER1/2 indicates a possible role for immunosuppression inthe development of the tumor, and whether a reduction in immunosuppressionmight have influenced the course of the disease is open to question.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-1536
    Keywords: Key words Flocculation and stabilization ; zetapotential ; colloidal silica ; poly(diallyl-dimethyl-ammonium chloride) ; copolymers of diallyl-dimethyl-ammonium chloride and N-methyl-N-vinylacetamide ; photon correlation spectrometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  The stabilization and flocculation behavior of colloidal silica-particles with cationic polyelectrolytes (PE) is investigated. The zetapotentials, diffusion coefficients and flocculation rate constants of silica particles have been measured as a function of the adsorbed amount of cationic polyelectrolytes poly(diallyl-dimethyl-ammoniumchloride) (PDADMAC) of different molar masses and of statistic copolymers of DADMAC and N-methyl-N-vinyl-acetamide (NMVA) of various compositions at different salt concentrations and pH-values. Very fast flocculation due to van der Waals attraction occurs if the zetapotential is small. At low ionic strength this condition occurs just below the plateau of the adsorption isotherms where the surface charges are screened by adsorbed polycations. Additionally with high molecular polycations slow mosaic flocculation is observed at lower PE concentrations. At high ionic strength fast flocculation takes place at low macroion concentration due to the screening of the surface charges by adsorbed polycations and salt ions. At medium concentrations of polycations below plateau adorption slow bridging flocculation is observed. At plateau adsorption the suspensions become stabilized up to high ionic strength. At low salt concentration charge reversal at full coverage with polycations results in electrostatic repulsion. At high ionic strength the particles are stabilized sterically due to the osmotic repulsion of the long adsorbed PE tails. Therefore macroions of high molar mass are necessary to stabilize the suspension at high ionic strength.
    Type of Medium: Electronic Resource
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