A frame assembly for security screens having at least two parts, including first and second parts, which together form a recess, a retaining means for retaining an edge of a generally planar member within the recess and urging means for increasing gripping force applied to the generally planar member within the recess.

A process for producing a composition containing bovine insulin-like growth factor 1 which comprises bringing milk or milk-derived material into contact with a cation exchanger and eluting the adsorbed bovine insulin-like growth factor 1. As the growth factor 1 can reinforce bones, the composition containing amply the same is useful as the material of food, drink, drug, feed and so forth effective in preventing or treating various osteoarticular diseases, particularly osteoporosis.

An antigen or group of antigens for preventing or reducing ectoparasite infection or disease in an animal is described. The antigen(s) is such that when the animal is immunised with the antigen(s), immunity of the animal to the ectoparasite is boosted by natural challenge of the animal with the ectoparasite. Also described is a vaccine composition for prevention or reduction of ectoparasite infection or disease in an animal. The composition includes a prophylactically effective amount of an antigen or group of antigens against an ectoparasite, an adjuvant and a cytokine.

A process for destroying the organic portion of a waste material is provided. The method utilizes a molten salt solution, and the destruction is achieved by contacting the waste with the molten salt. Apparatus for performing this process is also provided, and includes a molten salt bath, and several means for achieving the necessary contacting. A process utilizing a blend of alkaline and nitrate for destroying the organic portion of solid waste material is also provided, along with an apparatus for performing the same.

An article grading system for sorting objects, for example apples, into boxes containing apples of substantially the same size. The system optimises the packing process so that the value of the boxes packed from a given lot of apples is maximised. The system is provided with information relating to the price distribution of apples of various sizes and, using this as well as other information, decides at which box each individual apple should be off-loaded. The system works on-line wherein fruit are delivered to the system via a conveyor (7) on which are mounted a plurality of 'cups', each of which may hold one apple. A local area network (15) of personal computers controls the operation of the system including accepting for input the weights or sizes of each individual piece of fruit via weighing or optical recognition stations and controlling the ejection of each individual piece of fruit at positions along the conveyor (7) corresponding to respective boxes being packed depending on the solution determined by the optimising algorithm which is also implemented on a personal computer linked to the local area network.