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(I) ABRAMS (R).- Phosphorous metabolism 1952, 2, 335 edited by W.D. Me Elroy and BE, Class.

(Ibis) ALBAUM (H.G.) » UMBREIT (W.W.).- Differentiation

between ribose - 5 - phosphate and ribose - 5 - phosphate by means of the orcinol pentose reaction.

J.Biol. Cnem. 1947, 167, 369-370.

(2) ALDOUS-(T.6.) .SSTEMARTU (DK. Rs) Tereffect ofubira violet radiation upon enzymatic activity and viability of the yeast cell.

Can, Med: Se1.,1052,,307 961.

(3) ANDREASEN (A.A.), STIER (T.J.).- Anaerobic nutrition of Saccharomyces cerevisiae. J.Cell. Comp. physiol. 1953, 4I, 23.

(4) BACQ (Z.H.).- L'action indirecte du rayonnement X et ultra-violet, Exporiontia, IOST, 7, 2ET.

(5) BAK (B.V.).- Effect of drying on the ergosterol content of yeast.

Biokhimiya, 1939, 4, 93.

(6) BENZER (5.).- Resistance to ultraviolet light as an index to the reproduction of bacteriophase, Je. Bact+ 1952, 63e se

(7) BENZER (S.), JACOB (F.).- Etude du développement du bactériophage au moyen d'irradiation par la lumière ultra-violette.

Ann. Inst. Pasteur. 1953, 84, 166.

(8) BONNER (J.), SANDOVAL (A.), TANG (Y.W.), ZECHMEISTER (L).- Changes in Folyène Synthesis induced by mutation in a red yeast (Rhodotorula

rubra), Areh. Biochem, 1946, 10, II3.