Section 38J. In determining the net income subject to tax under this chapter, a business corporation may deduct, in addition to any other allowable deduction under this chapter, an amount equal to twenty-five per cent of the allowable deduction for any qualified research contribution, as defined in section one hundred and seventy (e)(4) of the Federal Internal Revenue Code as amended and in effect for the taxable year, to an educational organization, as therein defined, located in the commonwealth.