Laboratories used for research, design or experimentation, provided that no materials or products shall be manufactured, processed or fabricated for sale or distribution. The foregoing shall not prohibit processing or fabricating incidental to product research. No use or structure shall be permitted under this subsection unless the Planning Board expressly finds that the operation thereof will not result in dust, smoke, fumes, gas, offensive or noxious odors or other atmospheric effluent, and that the noise at the boundary of such lot shall not exceed in intensity and frequency the noise of street traffic at the adjoining street or streets, and that such use will not result in glare observable from such street or produce vibrations noticeable beyond the lot lines or pose a threat of fire, explosion or radiation. The use shall comply with the bulk requirements of the B-A Zone as contained in the Schedule of Regulations.