Abstract: A method for marking a liquid petroleum hydrocarbon. The method comprises adding to the liquid petroleum hydrocarbon at least one substituted anthraquinone dye having formula (I) wherein R1 and R2 independently are hydrogen, hydroxy, OR11, amino or NR11R12; R3 and R5 independently are alkyl, aryl, aralkyl, heteroalkyl or heterocyclic; R4 and R6 independently are hydrogen or alkyl; R7, R8, R9 and R10 independently are cyano, nitro or hydrogen, provided that at least two of R7, R8, R9 and R10 are cyano or nitro; R11 is alkyl, aryl, aralkyl, heteroalkyl, heterocyclic or alkanoyl; R12 is hydrogen or alkyl; and wherein the substituted anthraquinone dye(s) has an absorption maximum in the range from 690 nm to 1000 nm.

Abstract: A method for marking a liquid petroleum hydrocarbon.

Abstract: A method for marking a liquid petroleum hydrocarbon. The method comprises adding to the liquid petroleum hydrocarbon: (i) at least one anthraquinone dye having an absorption maximum in the range from 710 nm to 850 nm selected from the group consisting of 1,4,5,8-tetrasubstituted anthraquinones and anthraquinone dimers; and (ii) at least one visible dye having an absorption maximum in the range from 500 nm to 700 nm.

Abstract: The invention relates to the use of a sulphated ion exchanger to selectively remove lipoproteins from blood plasma or serum. Although the attraction between sulphate groups and proteins has long been recognized it has now unexpectedly been found that cationic ion exchangers whose ion exchange capacity is provided by sulphate groups bind lipoproteins selectively in presence of other plasma or serum proteins and ions when they are equilibrated with solutions containing divalent cations and the same cation is added to the plasma or serum. Types of ion exchanger matrices and applications of the utlity are discussed.

Abstract: Improving the adhesion of a gelatin coating to a styrene homopolymer or copolymer film by solvent treating and corona discharge treating the film prior to coating with a gelatin layer in the production of a coated photobase.

Abstract: Anti-static photographic films comprise a self-supporting synthetic plastics film base, such as a polyethylene terephthalate film, having superimposed on at least one side a gelatin-containing subbing layer and a radiation-sensitive layer superimposed on the gelatin layer, in which an anti-static material is included in the gelatin-containing subbing layer or being interposed as a layer between the gelatin-containing subbing layer and the radiation-sensitive layer, said anti-static material comprising a polymer or copolymer containing repeating units of the formula: ##STR1## wherein R represents hydrogen or methyl, R.sup.1 represents methyl or ethyl, R.sup.2 and R.sup.3 each independently represent methyl or ethyl or R.sup.2 and R.sup.3 taken together represent --CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 -- or --(CH.sub.2).sub.n -- where n represents 4, 5 or 6, A represents an alkylene or substituted alkylene group and X.sup.