Abstract: The invention provides American chestnut leaf compositions comprising oxalate oxidase. The compositions reduce oxalate levels in dietary sources of oxalate and are useful in reducing oxalate levels and reducing stone disease in patients. The invention provides methods of extracting and purifying oxalate oxidase from American chestnut leaf. The invention provides methods of extracting oxalate from biological samples.

Abstract: The present invention is directed to a method for disinfecting or sterilizing food, particularly, fresh produce, fruits and vegetables, by applying antimicrobial polypeptides (AMP). The AMP used in the present invention consists of from 13 to 20 amino acids and has an amphipathic alpha helix structure, wherein 3 or more of the amino acids form a positively charged domain extending axially along the alpha helix.

Abstract: A cement-bonded particle board with finer particles concentrated at the surfaces of the board and coarser particles concentrated within the board is formed by spreading the particulate material onto a moving carrier (50), the particulate material initially being projected in a first generally horizontal direction above the carrier and allowed to fall gravitationally without interacting with any fixed surface, whilst the falling particles are subjected to a through-flow of air [B] immediately above the carrier in a second direction opposite to that in which the particles are initially projected, the coarser particles being projected preferentially in said first direction and the finer particles being carried preferentially in said second direction by the airstream [B] to effect a second stage of separation.