Bioresorbable grafts and bioresorbable implants for use in tissue regeneration; bioresorbable grafts and bioresorbable implants for use in surgery; medical plasters; medical and wound dressings; grafts, implants, plasters and dressings for use in burn and wound care; grafts, implants, plasters and dressings for use in chronic or acute wound care; grafts, implants, plasters and dressings for use in soft tissue repair