768
S U B J E C T I N D E X
Nucleolar satellite (Barr b o d y ) , 399
Nucleolus,
adrenaline and, 616
association o f chromosomes in, 411
3
H-cytidine and, 327
heterochromatin and, 432
irradiation of, 217, 328
during mitosis, 205, 207, 214, 216-17
omission of, in nucleic acid determinations, 332-3
3
H-thymidine and, 222, 3 2 5 - 6
Nucleoprotein,
in embryo extract, 34—5
and inducing agents, 549
inductive or infective action of, 59
measurement of, 8
synthesis of, 31
Nucleosides,
from glucose, 250
requirement for, 255
synthesis of, 254
in synthetic media, 117, 129
triphosphates and D N A synthesis, 320
Nucleotides,
in D N A , 319
and induction, 481
in S-period, 222
synthesis of, 255
Number,
of cells necessary for differentiation,
472
Nutritional depletion, 298
Nylon gauze,
for organ cultures, 78
O
Odontoblasts,
as mechanocytes, 146
Oesophagus,
citral and epithelium of, 661
perfusion methods for, 80
vitamin A and, 663, 6 7 0 - 1 , 673
Oestradiol,
and alkaline phosphatase, 627
and development o f syrinx, 621
and differentiation o f gonads, 619
and endometrium, 306
and genital tract, 617
and mammary gland, 6 3 3 - 5
and melanophores, 632
and mitotic spindle, 616-17
and N a / K , 26
and prostate, 629
and seminal vesicle, 627
as supplement to synthetic media, 122
and uptake o f glycine, 306, 308
and vagina, 627
Oestrogens,
on b o n e marrow, 616
on dental pulp, 616
o n epidermis, 616
on heart fibroblasts, 616
and m a m m a r y glands, 6 3 3 - 5 , 639
as mitotic poisons, 616-17
and prostate, 6 2 8 - 3 2
on spleen, 616
and tumours o f kidney, 633
and uterus, 627, 632-3
and vagina, 6 2 5 - 7 , 632
Oestrone,
and alkaline phosphatase, 627
and mammary gland function, 127
and mitotic spindle, 616
and precancerous changes, 630
and prostatic epithelium, 628-31
and seminal vesicle, 627
and testosterone, 629
and uterus, 627
and vagina, 129, 6 2 5 - 6
Olfactory epithelium, 148
Oligodendrocytes (oligodendroglia), 148
contractile activity of, 40
differentiation of, 173
as mechanocytes, 159
Oncotrephin, 228
Orchidectomy,
and prostatic carcinoma, 630
Organ culture,
on agar, 7 5 - 6 , 476
autolysis in, 298
behaviour o f cells in, 150, 170
o f blastoderms, 5 5 3 - 5
o f b r o w n fat, 265
o f cell aggregates, 507
and cell culture, compared, 4 8 2 - 3 ,
6 3 2 - 3
and chondrogenesis, 476, 597
and continuous variation, 482
definition of, 1, 20
development of, 6
and differentiation, 4 6 8 - 9 , 4 7 6 - 7
of embryonic organs, 70, 76
essential features of, 145
S U B J E C T I N D E X
Nucleolar satellite (Barr b o d y ) , 399
Nucleolus,
adrenaline and, 616
association o f chromosomes in, 411
3
H-cytidine and, 327
heterochromatin and, 432
irradiation of, 217, 328
during mitosis, 205, 207, 214, 216-17
omission of, in nucleic acid determinations, 332-3
3
H-thymidine and, 222, 3 2 5 - 6
Nucleoprotein,
in embryo extract, 34—5
and inducing agents, 549
inductive or infective action of, 59
measurement of, 8
synthesis of, 31
Nucleosides,
from glucose, 250
requirement for, 255
synthesis of, 254
in synthetic media, 117, 129
triphosphates and D N A synthesis, 320
Nucleotides,
in D N A , 319
and induction, 481
in S-period, 222
synthesis of, 255
Number,
of cells necessary for differentiation,
472
Nutritional depletion, 298
Nylon gauze,
for organ cultures, 78
O
Odontoblasts,
as mechanocytes, 146
Oesophagus,
citral and epithelium of, 661
perfusion methods for, 80
vitamin A and, 663, 6 7 0 - 1 , 673
Oestradiol,
and alkaline phosphatase, 627
and development o f syrinx, 621
and differentiation o f gonads, 619
and endometrium, 306
and genital tract, 617
and mammary gland, 6 3 3 - 5
and melanophores, 632
and mitotic spindle, 616-17
and N a / K , 26
and prostate, 629
and seminal vesicle, 627
as supplement to synthetic media, 122
and uptake o f glycine, 306, 308
and vagina, 627
Oestrogens,
on b o n e marrow, 616
on dental pulp, 616
o n epidermis, 616
on heart fibroblasts, 616
and m a m m a r y glands, 6 3 3 - 5 , 639
as mitotic poisons, 616-17
and prostate, 6 2 8 - 3 2
on spleen, 616
and tumours o f kidney, 633
and uterus, 627, 632-3
and vagina, 6 2 5 - 7 , 632
Oestrone,
and alkaline phosphatase, 627
and mammary gland function, 127
and mitotic spindle, 616
and precancerous changes, 630
and prostatic epithelium, 628-31
and seminal vesicle, 627
and testosterone, 629
and uterus, 627
and vagina, 129, 6 2 5 - 6
Olfactory epithelium, 148
Oligodendrocytes (oligodendroglia), 148
contractile activity of, 40
differentiation of, 173
as mechanocytes, 159
Oncotrephin, 228
Orchidectomy,
and prostatic carcinoma, 630
Organ culture,
on agar, 7 5 - 6 , 476
autolysis in, 298
behaviour o f cells in, 150, 170
o f blastoderms, 5 5 3 - 5
o f b r o w n fat, 265
o f cell aggregates, 507
and cell culture, compared, 4 8 2 - 3 ,
6 3 2 - 3
and chondrogenesis, 476, 597
and continuous variation, 482
definition of, 1, 20
development of, 6
and differentiation, 4 6 8 - 9 , 4 7 6 - 7
of embryonic organs, 70, 76
essential features of, 145