Abstract: In the application, the change in the magnetic state of the haemoglobin caused by the malarial infection is exploited by detecting suitable properties of haemozoin which are dependent on the application of a magnetic field. FIG. 1 shows apparatus, shown generally at (10), for performing magneto-optical detection using photo-acoustic techniques. The apparatus (10) comprises a light source (12), producing a beam of optical radiation (14) which passes through a polarizer (16), a variable LC retarder (0 or 180° retardance) (18), and a (chopper 20), before impinging on a sample (22) held in a sample holder (24). The sample is in direct contact with an acoustic detector (26). The apparatus (10) further comprises an electromagnet (28), and a Gauss meter (30) can be utilized to measure the applied magnetic field strength.

Abstract: In the application, the change in the magnetic state of the haemoglobin caused by the malarial infection is exploited by detecting suitable properties of haemozoin which are dependent on the application of a magnetic field. FIG. 1 shows apparatus, shown generally at (10), for performing magneto-optical detection using photo-acoustic techniques. The apparatus (10) comprises a light source (12), producing a beam of optical radiation (14) which passes through a polariser (16), a variable LC retarder (0 or 180° retardance) (18), and a (chopper 20), before impinging on a sample (22) held in a sample holder (24). The sample is in direct contact with an acoustic detector (26). The apparatus (10) further comprises an electromagnet (28), and a Gauss meter (30) can be utilised to measure the applied magnetic field strength.

Abstract: A water-soluble photoluminescent compound including a symmetrical skeletal structure of the formula (A) in which x may represent any integer, and in which the phenyl rings may be substituted, is disclosed. A protein detector comprising such a compound and a method of measuring the total dissolved protein content of a fluid sample are also disclosed.

Abstract: Pendant groups in the alpha-amino acid monomer residues comprising a polypeptide molecule are selectively modified by applying an electric potential across an electrochemical cell containing the polypeptide.