Index 



273 



Tunicin, 62 



Tumbull's blue, 33, 38 



Tween method for esterases, 203 



Tyrosine, 113, 114, 120, 123 



Ultraviolet spectrography, 8 



Unsaturated fatty acids, 101 

 auto-oxidation of, 101, 105 

 Schiff reaction of, 109, 110 



Unsaturated substrates for lipase, 204 



Urea, 117 



Urease, 219 



Uric acid, 34, 118 



Validity of methods, verification of, 

 17 



Vitamin A, 12 

 Vitamin D, 100 



Waxes, 92 

 Whipple's disease, 63 



Xanthoprotein reaction, 114 

 Xanthydrol, 117 

 X-ray spectrography, 8 



Yeast nucleic acid, 52 



Zinc, 42 



Zinc-leuco method for peroxidase, 



164 

 Zymohexase, 197 



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