| Draper, John | <person> English chemist, 1811-1882. See: Draper's law. (05 Mar 2000) |
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| Draper's law | A chemical change is produced in a photochemical substance only by those light rays that are absorbed by that substance. (05 Mar 2000) |
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| Abernethy, John | <person> British surgeon and anatomist, 1764-1831. See: Abernethy's fascia. (05 Mar 2000) |
| Baker, john Randal | <person> English zoologist, *1900. See: Baker's pyridine extraction, Baker's acid haematein. (05 Mar 2000) |
| Baldy, John | <person> U.S. Gynecologist, 1860-1934. See: Baldy's operation. (05 Mar 2000) |
| Barlow, John | <person> 20th century South African cardiologist. See: Barlow syndrome. (05 Mar 2000) |
| Barton, John Rhea | <person> U.S. Surgeon, 1794-1871. See: Barton's bandage, Barton's forceps, Barton's fracture. (05 Mar 2000) |
| Beckwith, John Beckwith | <person> U.S. Pathologist, *1933. See: Beckwith-Wiedemann syndrome. (05 Mar 2000) |
| Bell, John | <person> Scottish surgeon and anatomist, 1763-1820. See: Bell's muscle. (05 Mar 2000) |
| Bittner, John | <person> U.S. Oncologist, 1904-1961. See: Bittner agent, Bittner's milk factor. (05 Mar 2000) |
| Bowen, John | <person> U.S. Dermatologist, 1857-1941. See: Bowen's disease, Bowen's precancerous dermatosis, bowenoid papulosis, Bowenoid cells. (05 Mar 2000) |
| Braxton Hicks, John | <person> British gynecologist, 1823-1897. See: Braxton Hicks contraction, Braxton Hicks sign, Braxton Hicks version. (05 Mar 2000) |
| Browne, Sir Denis John | <person> British surgeon, *1892. See: Denis Browne's pouch, Denis Browne splint. (05 Mar 2000) |
| Caffey, John Patrick | <person> U.S. Physician, radiologist, and peditrician, the "the father of paediatric radiology", 1895-1978. See: Caffey's disease, Caffey's syndrome, Caffey-Kempe syndrome, Caffey-Silverman syndrome. (05 Mar 2000) |
| Callahan, John | <person> U.S. Endodontist, 1853-1918. See: Callahan's method. (05 Mar 2000) |
| Gaddum, John | <person> English biochemist, *1900. See: Gaddum and Schild test. (05 Mar 2000) |