Abstract: The invention concerns novel cross-linked poly(N,N-dialkylallyl)ammonium polymer materials containing quaternary propylammonium structural units which are effective in lowering elevated plasma levels of low density lipoproteins and lipoid components thereof, such as cholesterol, and which are of value in the treatment of conditions in which such elevated plasma levels are associated, for example, various vascular diseases. The invention also provides methods for the manufacture of the polymer materials and various intermediates for use in such manufacture.

Abstract: The invention relates to compositions for cleaning a wide range of soil types from dirty articles, such as metal, ceramic or glass substrates. A first class of solvent compositions used for cleaning is an oxidative stable mixture of non-polar aromatic hydrocarbons (p-cymene) and an organic polar component (2-ethylhexanol) for cleaning of low and intermediate polar soils. Alternately, water and surfactant is added to the mixture to form a water-in-oil emulsion for cleaning high polarity soils. A second class of solvent compositions used for cleaning dirty articles is a hydrogenated or dehydrogenated analogue of a terpene compound. The solvent composition is used in a process wherein a dirty article is contacted with the solvent under conditions that result in cleaning the soil type from the article. Residual solvent contamination is removed from the article surface by contacting the contaminated article at an elevated temperature with an aqueous medium and/or a low-boiling solvent.

Abstract: The invention concerns novel cross-linked poly(N,N-dialkylallyl)ammonium polymer materials containing quaternary propylammonium structural units which are effective in lowering elevated plasma levels of low density lipoproteins and lipoid components thereof, such as cholesterol, and which are of value in the treatment of conditions in which such elevated plasma levels are associated, for example, various vascular diseases. The invention also provides methods for the manufacture of the polymer materials and various intermediates for use in such manufacture.

Abstract: The invention relates to methods and compositions for cleaning a wide range of soil types from dirty articles, such as metal, ceramic or glass substrates. A first class of solvent compositions used for cleaning is an oxidative stable mixture of non-polar aromatic hydrocarbons and an organic polar component for cleaning of low and intermediate polar soils. Alternately, water and surfactant is added to the mixture to form a water-in-oil emulsion for cleaning high polarity soils. A second class of solvent compositions used for cleaning dirty articles is a hydrogenated or dehydrogenated analogue of a terpene compound. The solvent composition is used in a process wherein a dirty article is contacted with the solvent under conditions that result in cleaning the soil type from the article. Residual solvent contamination is removed from the article surface by contacting the contaminated article at an elevated temperature with an aqueous medium and/or a low-boiling solvent.

Abstract: The invention is a rotary joint for singlemode optical fibers, having a fixed and a rotating part to permit the transmission of optical signals across a rotational interface (such as a winch or turret) with minimal insertion loss and, in particular, low reflections (good return loss). There is no need of conversion to electrical signals; the device is passive. It may be use an oil of refractive index matched to that of the glass fibers and to that of fiber tapers or lenses used to expand the beam emitted from one fiber and contract it for transmission into the other fiber. The device is bidirectional. By use foil, through precision techniques for building and mounting the optical and mechanical components, and by use of advanced bearings, both the insertion loss and unwanted reflections (return loss) can be minimized, thereby making it suitable for use with singlemode fiber.