Duration of the several mitotic stages in the dividing root-tip cells of the common onion:
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| Main Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
Washington, DC
Carnegie Institution
1919
|
| Series: | Publication
265 Paper of the Station for Experimental Evolution at Cold Spring Harbor, New York 30 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Physical Description: | 48 S. graph. Darst. |
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MARC
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| 245 | 1 | 0 | |a Duration of the several mitotic stages in the dividing root-tip cells of the common onion |c by Harry Hamilton Laughlin |
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|---|---|
| adam_text | DURATION OF THE SEYEEAL MITOTIC STAGES IN
THE DIVIDING ROOT-TIP CELLS OF THE
COMMON ONION
BY
HARRY HAMILTON LAUGH LIN, Sc D
Eugenics Record Office, Carnegie Institution of Washington
Carnegte/Bnoh
Bepositum i
^gjIIOS OOI1J
VALKEMB J RG (L
PUBLISHED BY THE CAHNEGIE INSTITUTION OF WASHINGTON
WASHINGTON, 1919
CONTENTS
Page
Summary chart Frontispiece
Index to charts, diagrams, and tables 4
roof of principle: Hypothetical case 6
Applicability of plan 7
Stage index 9
Mitotic stage duration and time-complex found in dividing root-tip cells of the onion 9
Formula for determining the average relative duration of a given mitotic stage 9
Procession index 11
Mitotic synchronization in homologous tissue-samples 13
Cautions in method 13
Adequacy of the procession index 14
Formula for the average absolute duration of a given mitotic stage 15
Measure of accuracy 16
Preliminary experiments 18
Average relative durations of the several mitotic stages: Preliminary experiments 18
Probable errors 19
Other sources of possible error 21
Average absolute durations of the several mitotic stages: Preliminary experiments 22
Experiments to determine the effects of temperature increments upon the several
mitotic stages 24
The velocity of chemical reactions: Response to temperature differences 24
Material for the experiments 25
Apparatus: Thermostat 26
Sampling and counting 27
Further development of the statistical method 29
a Probable errors 29
b Procession index 30
c Coefficient of mitotic homogeneity 30
Further analysis of the dynamics of mitosis by the stage-timing method 30
a Quantitative increase in data 30
6 Effects of agents other than temperature 31
c Possible mitotic models 31
d Cell-division in development 31
e Relation of mitosis to other activities 31
Results and discussion 31
A Rhythm in mitosis 32
(a) General 32
(b) Ward s work 33
(c) Additional evidence 33
(d) Summary of evidence of mitotic periodicity 34
B Heat factor in growth _ 35
(а) General 35
(б) Phenology 35
C Nature of the complex in growth and mitosis 36
D Physico-chemical aspect 37
(а) Individuality in velocity reactions of the several mitotic stages to the
same temperature changes 37
(б) van t Hoff s law ^ 39
(c) Isolation of factors, - - -r:: ;7 40
Elimination by comparative experimental evidence 40
A single index for two factors 41
4 CONTENTS
Results and discussion—continued Page
(d) Difference between, physiological and purely chemical temperature-
velocity reactions i 42
Physiological processes 42
Growth or permanent bulk increase 42
Mitosis 43
(e) The reactions of definite mitotic stages 44
General survey 44
The movement of chromosomes 45
The peculiar reaction of mitotic stage No 6 : Jj 45
Summary 46
References 47
Charts, Diagrams, and Tables measuring the relative and absolute durations of the several
mitotic stages, and determining the relation between temperature and velocity of each
definitely marked stage of the mitotic cycle (All but the frontispiece in serial order
following page 48 )
Summary chart, Frontispiece
First series: Principles
1 Method chart
2 Properties of four condition-complexes
3 Principles and formulas
Second series: Preliminary study—Based upon 13,000 cell-counts distributed among
11 stages, through 13 observation-instants (from 10 a m to 12 noon),
at approximately 18° C jj
4 Stage index table I
5 Graphs showing mitotic and stage indices
6 Procession index table 1 S
7 Graphs showing orderly succession of procession indices:
Third series: Final study—Based-; upon 55,000 cell-counts distributed among 11
stages, through 19 observation-instants (from 10 a m to 1pm ),
one-third at 10° C , one-third at 20° C , and one-third at 30° C
A Average relative durations of the several mitotic stages
8 Stage index table 10° C
9 Stage index table 20° C
10 Stage index table 30° C ;
11 Graphs showing mitotic indices at 10° C , 20° C , and 30° C
B Average absolute durations of the several mitotic stages -
12 Procession index table 10° C
13 Procession index table 20° C
1 14 Procession index table 30° C
15 Table: Summary and comparison by stages and temperatures;
16 Comparison at 10° C , 20° C , and 30° C of average relative durations
17 Comparison at 10° C , 20° C , and 30° C of average absolute durations
18 Graphs showing comparative average absolute durations at 10° C , 20° C ,
and 30° C
Table: Qio values (on page 38 of text)
|
| adam_txt |
DURATION OF THE SEYEEAL MITOTIC STAGES IN
THE DIVIDING ROOT-TIP CELLS OF THE
COMMON ONION
BY
HARRY HAMILTON LAUGH LIN, Sc D
Eugenics Record Office, Carnegie Institution of Washington
Carnegte/Bnoh'
Bepositum i
^gjIIOS OOI1J
VALKEMB'J RG (L
PUBLISHED BY THE CAHNEGIE INSTITUTION OF WASHINGTON
WASHINGTON, 1919
CONTENTS
Page
Summary chart Frontispiece
Index to charts, diagrams, and tables 4
roof of principle: Hypothetical case 6
Applicability of plan 7
Stage index 9
Mitotic stage duration and time-complex found in dividing root-tip cells of the onion 9
Formula for determining the average relative duration of a given mitotic stage 9
Procession index 11
Mitotic synchronization in homologous tissue-samples 13
Cautions in method 13
Adequacy of the procession index 14
Formula for the average absolute duration of a given mitotic stage 15
Measure of accuracy 16
Preliminary experiments 18
Average relative durations of the several mitotic stages: Preliminary experiments 18
Probable errors 19
Other sources of possible error 21
Average absolute durations of the several mitotic stages: Preliminary experiments 22
Experiments to determine the effects of temperature increments upon the several
mitotic stages 24
The velocity of chemical reactions: Response to temperature differences 24
Material for the experiments 25
Apparatus: Thermostat 26
Sampling and counting 27
Further development of the statistical method 29
a Probable errors 29
b Procession index 30
c Coefficient of mitotic homogeneity 30
Further analysis of the dynamics of mitosis by the stage-timing method 30
a Quantitative increase in data 30
' 6 Effects of agents other than temperature 31
c Possible mitotic models 31
d Cell-division in development 31
e Relation of mitosis to other activities 31
Results and discussion 31
A Rhythm in mitosis 32
(a) General 32
(b) Ward's work 33
(c) Additional evidence 33
(d) Summary of evidence of mitotic periodicity 34
B Heat factor in growth _ 35
(а) General 35
(б) Phenology 35
C Nature of the complex in growth and mitosis 36
D Physico-chemical aspect 37
(а) Individuality in velocity reactions of the several mitotic stages to the
same temperature changes 37
(б) van't Hoff's law ^ \ 39
(c) Isolation of factors, - - -r::' ';7 40
Elimination by comparative experimental evidence 40
A single index for two factors 41
4 CONTENTS
Results and discussion—continued Page
(d) Difference between, physiological and purely chemical temperature-
velocity reactions i 42
Physiological processes 42
Growth or permanent bulk increase 42
Mitosis 43
(e) The reactions of definite mitotic stages 44
General survey 44
The movement of chromosomes 45
The peculiar reaction of mitotic stage No 6 : Jj 45
Summary 46
References 47
Charts, Diagrams, and Tables measuring the relative and absolute durations of the several
mitotic stages, and determining the relation between temperature and velocity of each
definitely marked stage of the mitotic cycle (All but the frontispiece in serial order
following page 48 )
Summary chart, Frontispiece
First series: Principles
1 Method chart
2 Properties of four condition-complexes
3 Principles and formulas
Second series: Preliminary study—Based upon 13,000 cell-counts distributed among
11 stages, through 13 observation-instants (from 10 a m to 12 noon),
at approximately 18° C jj
4 Stage index table 'I
5 Graphs showing mitotic and stage indices
6 Procession index table 1 S
7 Graphs showing orderly succession of procession indices:
Third series: Final study—Based-; upon 55,000 cell-counts distributed among 11
stages, through 19 observation-instants (from 10 a m to 1pm ),
one-third at 10° C , one-third at 20° C , and one-third at 30° C
A Average relative durations of the several mitotic stages
8 Stage index table 10° C
9 Stage index table 20° C
10 Stage index table 30° C ;
11 Graphs showing mitotic indices at 10° C , 20° C , and 30° C
B Average absolute durations of the several mitotic stages -
12 Procession index table 10° C
13 Procession index table 20° C
1 14 Procession index table 30° C
15 Table: Summary and comparison by stages and temperatures;
16 Comparison at 10° C , 20° C , and 30° C of average relative durations
17 Comparison at 10° C , 20° C , and 30° C of average absolute durations
18 Graphs showing comparative average absolute durations at 10° C , 20° C ,
and 30° C
Table: Qio values (on page 38 of text) |
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| series2 | Publication Paper of the Station for Experimental Evolution at Cold Spring Harbor, New York |
| spelling | Laughlin, Harry Hamilton Verfasser aut Duration of the several mitotic stages in the dividing root-tip cells of the common onion by Harry Hamilton Laughlin Washington, DC Carnegie Institution 1919 48 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier Publication 265 Paper of the Station for Experimental Evolution at Cold Spring Harbor, New York 30 Karyokinesis Onions Carnegie Institution <Washington, DC> Publication 265 (DE-604)BV035415500 265 HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=015743105&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Laughlin, Harry Hamilton Duration of the several mitotic stages in the dividing root-tip cells of the common onion Karyokinesis Onions |
| title | Duration of the several mitotic stages in the dividing root-tip cells of the common onion |
| title_auth | Duration of the several mitotic stages in the dividing root-tip cells of the common onion |
| title_exact_search | Duration of the several mitotic stages in the dividing root-tip cells of the common onion |
| title_exact_search_txtP | Duration of the several mitotic stages in the dividing root-tip cells of the common onion |
| title_full | Duration of the several mitotic stages in the dividing root-tip cells of the common onion by Harry Hamilton Laughlin |
| title_fullStr | Duration of the several mitotic stages in the dividing root-tip cells of the common onion by Harry Hamilton Laughlin |
| title_full_unstemmed | Duration of the several mitotic stages in the dividing root-tip cells of the common onion by Harry Hamilton Laughlin |
| title_short | Duration of the several mitotic stages in the dividing root-tip cells of the common onion |
| title_sort | duration of the several mitotic stages in the dividing root tip cells of the common onion |
| topic | Karyokinesis Onions |
| topic_facet | Karyokinesis Onions |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=015743105&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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