Temperature dependence of the photoluminescence from ensembles of amorphous silicon nanoparticles with various average sizes.

Amorphous SiO(x) thin films with three different oxygen contents (x = 1.3, 1.5, and 1.

An IgA, IgG and IgM-containing human immunoglobulin for oral administration to high-risk bottle-fed newborns. I. Immunochemical characterisation and antibody activity.

Antibodies to a wide spectrum of infectious agents belonging to the IgA, IgM and IgG isotypes are thought to be one of the protective factors in human milk. Cow milk-fed newborns are at an increased risk of infections as well as of allergic diseases and of necrotising enterocolitis. A reasonable approach would be to add to the milk formula fed to them the immunoglobulins present in human milk.

Variable region-connected, dimeric fraction of intravenous immunoglobulin enriched in natural autoantibodies.

The beneficial effect of intravenous immunoglobulin (IVIg) therapy in patients with autoimmune diseases is at least partially dependent on the content in IVIg of antibodies capable of interacting with variable regions (idiotypes) of autoantibodies. In the present study, we have evaluated the antibody activity to a panel of self and environmental antigens of IVIg preparations and their dimer-enriched fractions. Dimers were either obtained by affinity chromatography of IVIg on Sepharose-bound F(ab')2 fragments of IVIg or by size exclusion gel filtration chromatography of IVIg.

IgG subclasses distribution in immunoglobulin preparations for intravenous use.

The levels of IgG subclasses were determined, by radial immunodiffusion using monoclonal antibodies, in 16 production batches of two human immunoglobulin preparations for intravenous use--Immunovenin and Immunovenin-intact. While the partially degraded preparation--Immunovenin contained exclusively IgG1, the subclass distribution in Immunovenin-intact was close to that observed in normal human serum.