Abstract: Method of tracking a plurality of objects comprising: focusing an image of the objects on an imaging element using an optical system; capturing the image of the objects using an imaging element comprising a plurality of pixels; measuring at least one characteristic of the objects from the captured image using an image processor; wherein the field of view is set be the widest field of view for which the image processor is able to measure the at least one characteristic.

Abstract: A method of purifying amyloid fibrils comprises treating a sample containing the fibris with a protease, detergent, chemical denatuarant or chaotrope. The amyloid fibrils may then be collected from the treated sample. The treatment is preferably carried out under conditions which allow digestion, degradation or denaturation of amorphous aggregates and soluble precursors in the sample but which do not digest, degrade or denature the amyloid fibrils. A homogonous preparation of amyloid fibrils is provided in which fibrils comprise at least 80% by weight of protein in the sample.

Abstract: Bioactive peptides are modified to have an increased solubility or reduced tendency to aggregate compared to the wild type modified peptide. In particular modified human calcitonin comprises a peptide having at least 70% identity to SEQ ID NO: 1 and being modified such that the tendency of the modified peptide to aggregate is reduced compared to unmodified human calcitonin.