An oil and fat composition is provided which can reduce cooked odors without using an additive such as emulsifier. The present invention utilizes the instruction allocation logic of a microprocessor to allow additional buffer entries, above those called for in the specification to be provided. The terminals are respectively received in the receiving chambers of the housing. The semi-permeable membrane is non-ionic, and has a molecular weight cut-off large enough to pass the strong acid, and preferably much larger. The benzophenone derivatives have an inhibition activity of microtubule formation and can be used to treat a normal proliferative state of a malignant tumor by killing the actively proliferating cells.