Abstract: A composite membrane comprising: (a) a porous support; (b) optionally a gutter layer; (c) a polyimide discriminating layer; and (d) a protective layer comprising dialkylsiloxane groups and having an average thickness of 825 to 2,000 nm; wherein the polyimide discriminating layer comprises 2,4,6-trimethyl-1,3-phenylene groups, each such group independently having an atom or substituent other than H at the 5-position.

Abstract: A composite gas membrane comprising: a) a porous support; b) an activated gutter layer; c) a discriminating layer located on the gutter layer; and d) optionally a protective layer on the discriminating layer; wherein the said layers remain in place when a peeling force of 2.5 N/1.5 cm is applied to the outermost of said layers.

Abstract: A composite membrane comprising: a) a porous support; b) a gutter layer, a portion of which is present within the support and a portion of which is outside of the support; and c) a discriminating layer on the gutter layer; wherein: (i) the portion of the gutter layer outside of the support has an average thickness (GLe) of 10 nm to 900 nm; and (ii) the portion of the gutter layer present within the support has an average thickness (GLi) of 10% to 350% of GLe.

Abstract: A process for preparing a composite membrane comprising the steps: a) applying a radiation-curable composition to a porous support; b) irradiating the composition and thereby forming a gutter layer of cured polymer; and c) forming a discriminating layer on the gutter layer; wherein the radiation-curable composition comprises a partially crosslinked, radiation-curable polymer comprising epoxy groups and siloxane groups, a photoinitiator and is substantially free from mono-epoxy compounds. Composite membranes and gas separation cartridges are also claimed.

Abstract: A composite membrane comprising: a. a porous support; b. a polymeric layer comprising dialkylsiloxane groups and a metal, the polymeric layer being present on the porous support; c. a discriminating layer present on the polymeric layer; and d. optionally a protective layer present on the discriminating layer wherein the polymeric layer has a molar ratio of metal:silicon of at least 0.0005.

Abstract: A process for preparing a composite membrane comprising the steps of: a) applying a radiation-curable composition to a porous support; b) irradiating the composition and thereby forming a layer of cured polymer of thickness 20 to 400 nm on the support; c) forming a discriminating layer on the layer of cured polymer; and d) optionally forming a protective layer on the discriminating layer; wherein the radiation-curable composition comprises a partially crosslinked, radiation-curable polymer comprises dialkylsiloxane groups. Composite membranes are also claimed.

Abstract: A composite gas membrane comprising: a) a porous support; b) an activated gutter layer; c) a discriminating layer located on the gutter layer; and d) optionally a protective layer on the discriminating layer; wherein the said layers remain in place when a peeling force of 2.5 N/1.5 cm is applied to the outermost of said layers.

Abstract: A composite membrane comprising: a) a porous support; b) a gutter layer, a portion of which is present within the support and a portion of which is outside of the support; and c) a discriminating layer on the gutter layer; wherein: (i) the portion of the gutter layer outside of the support has an average thickness (GLe) of 10 nm to 900 nm; and (ii) the portion of the gutter layer present within the support has an average thickness (GLi) of 10% to 350% of GLe.

Abstract: A process for preparing a composite membrane comprising the steps: a)applying a radiation-curable composition to a porous support; b)irradiating the composition and thereby forming a gutter layer of cured polymer; and c)forming a discriminating layer on the gutter layer; wherein the radiation-curable composition comprises a partially crosslinked, radiation-curable polymer comprising epoxy groups and siloxane groups, a photoinitiator and is substantially free from mono-epoxy compounds. Composite membranes and gas separation cartridges are also claimed.

Abstract: A composite membrane comprising: a.a porous support; b.a polymeric layer comprising dialkylsiloxane groups and a metal, the polymeric layer being present on the porous support; c.a discriminating layer present on the polymeric layer; and d.optionally a protective layer present on the discriminating layer whereinthe polymeric layer has a molar ratio of metal:silicon of at least 0.0005.

Abstract: A process for preparing a composite membrane comprising the steps of: a) applying a radiation-curable composition to a porous support; b) irradiating the composition and thereby forming a layer of cured polymer of thickness 20 to 400 nm on the support; c) forming a discriminating layer on the layer of cured polymer; and d) optionally forming a protective layer on the discriminating layer; wherein the radiation-curable composition comprises a partially crosslinked, radiation-curable polymer comprises dialkylsiloxane groups. Composite membranes are also claimed.

Abstract: A photographic paper comprising an outer-most layer comprising a hydrophilic colloid binder and colloidal silica, wherein: (i) the weight ratio of colloidal silica to hydrophilic colloid binder in said layer is 0.3:1 to 3:1; and (ii) the colloidal silica has a mean particle size of 2 to 10 nm. The photographic papers have low stickiness rendering them suitable for storage before use and also after use in album-books where the photographic papers are in face-to-face contact.

Abstract: The invention relates to nucleic acid molecules encoding (poly)peptides having chemotaxis inhibiting (poly)peptides CHIPS activity, to recombinant vectors harboring such molecules, and the host cells carrying the vectors. The invention further relates to methods for preparing recombinant (poly)peptides having CHIPS activity and to the use of such recombinant (poly)peptides having CHIPS activity for diagnosis, prophylaxis and treatment, such as the treatment of inflammation reactions and HIV. In addition, the invention provides therapeutic and diagnostic compositions comprising as the active ingredient the (poly)peptide having CHIPS activity.