Abstract: Operations on a sequence of digital images can be performed by causing an operation associated with the currently-active tool to be performed on each digital image that corresponds to a representation in a user-selected range of digital images. The operation is performed in response to the user input selecting the range.

Abstract: Disclosed herein is a method and graphical user interface (GUI) for navigating within the contents of a computer file, and specifically within a large non-paginated graphical file. A first portion of the file is displayed at a first magnification. Thereafter, an option is selected to display a second portion of the contents of the file (preferably the entire file) at a second lower magnification. An area is defined within the displayed second portion that highlights the first portion. This area is moveable, preferably by clicking and dragging the area using a mouse pointer, to a new (third location) on the file. Thereafter, the method allows the third portion to be automatically or manually magnified as was the first portion.

Abstract: Avidin and streptavidin modified water-soluble polymers are provided, such modified polymers being exemplified by, but not limited to, water-soluble polyacrylamides being substituted by multiple substituents of avidin or streptavidin. The avidin and streptavidin modified polymers provided, may be stored, and later used to bind biotinylated antibiodies, biotinylated toxins, or biotinylated isotope-labelled proteins, thus producing homo- or heteroconjugates of known composition. A process for the preparation of certain of the avidin or streptavidin modified polymers and conjugates thereof is also provided.