348 PRINCIPLES OF BIOLOGICAL MICROTECHNIQUE 



collodion 



as embedding medium, 75, 96 

 as model for acidic tissue-com- 

 ponents, 193 

 dyeing of, 239, 323 

 colorants, 296 

 colouring agents, 296 

 compatibility of fixatives, 96, 99, 

 104, 109, 118, 124, 133, 138, 



150 

 Congo red, 166, 183, 230 

 Congo rubin, 183, 199, 260 

 Conn, 165 

 Cooperstein, 292 

 coriphosphine, 310 

 Cornil, 244 

 Corti, 100, 106, 135 

 cotton, 188 

 cotton blue, 236 

 cotton, dyeing of, 199, 201, 223 



pore-size in, 238 

 creosote, 143, 146 

 cricket, 72 

 Criegee, 62 

 crimson lake, 207 

 crystal violet, 168, 170, 171, 190, 



224, 251 

 cyanine, 244 

 cyclohexane-diol, 61 

 cyclohexene, 61 

 cysteine, 44, 48, 49, 52, 57, 63 

 cytochrome C, 292 

 cytoskeleton, 31 



Dactylopius cacti, 176 



dahlia, 165, 170, 171, 190, 224, 251 



dark-ground microscopy, 70 



dehydrogenase, 293 



denaturation, 45, 46, 93 



density of tissue-constituents, 



effects on dyeing, 231 

 density (optical), 161 

 diamine blue 2B, 236, 278, 281, 



285, 290 

 diammine, 53 

 diatoms, 245 

 dichroism, 258 

 diethylene glycol stearate, 79 

 Dietrich, 129 



differentiation of mordant dyes, 



220 

 diffusion of dyes, 322 

 digestibility of fixed proteins, 55 

 'direct cotton' dyes, 235 

 disazo dyes, 183, 184, 276, 277 

 DNA-ase, 232 

 DNA, Feulgen's test for, 309 



see nucleic acids 

 Durchtrankungsf arbung, 1 97 

 dye-excluders, 240 

 dyeing of cartilage, 243, 244 



of cellulose, 188, 199 



of chromosomes, 194, 220, 225, 

 232, 280 



of cotton, 199 



of mitochondria, 202, 218, 219, 



241, 279, 281, 292, 295 



of nucleic acids, 192, 204, 219, 

 230, 242, 246, 251, 254, 258, 

 266, 291, 302 



of nucleoprotein (chromatin), see 

 nucleoproteins 



of nucleus of amoebae, 273 



of red blood-corpuscles, 229, 



242, 265 



dyes, absorption of light by, 160 



adjective, 208 



azoic, 307 



cataphoresis of, 321 



definition of, 312 



differential action of, 228 



diffusion of, 322 



direct attachment to tissues, 187 



'direct cotton', 235 



effect of alkalinity and acidity on 

 their action, 323 



effect of fixatives on their action, 

 92, 95, 98, 104, 109, 117, 124, 

 132, 137, 202, 325 



electrophoresis of, 321 



experiments on (practical de- 

 tails), 321 



flocculation of, 277, 290 



fluorescent, 278 



for blood, 262 



indirect attachment to tissues, 

 207 



'levelling', 235 



