Growth Pattern and Environment: Differences in Growth of the Hard Tissues of the Heads of Wistar Rats Reared in Extremes of Litter-size |
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Page 65
... similar till day 25 , when the extremes of litter size were imposed . At day 30 , the day of changing over , the rats which had been in large litters were significantly smaller than those till then in small litters . On day 37 , the ...
... similar till day 25 , when the extremes of litter size were imposed . At day 30 , the day of changing over , the rats which had been in large litters were significantly smaller than those till then in small litters . On day 37 , the ...
Page 78
... similar experiment has come to our knowledge . The work of Widdowson and McCance ( 1963 ) resembles it in that an attempt was made to see what effect imposition of underfeeding had on ability to recover , when the time and extent of ...
... similar experiment has come to our knowledge . The work of Widdowson and McCance ( 1963 ) resembles it in that an attempt was made to see what effect imposition of underfeeding had on ability to recover , when the time and extent of ...
Page 91
... similar though it is apparent from the tables that this is a rough approximation . It is interesting to observe the real longitudinal increments of stages 1 to 2 at last ! There is no reason to assume that there is a marked difference ...
... similar though it is apparent from the tables that this is a rough approximation . It is interesting to observe the real longitudinal increments of stages 1 to 2 at last ! There is no reason to assume that there is a marked difference ...
Contents
GENERAL INTRODUCTION | 1 |
EXPERIMENT | 4 |
THE NATURE OF THE EXPERIMENTS | 9 |
5 other sections not shown
Common terms and phrases
adrenal glands angle animals behaviour birth body length body weight cages catch-up cephalometric x-rays cephalostat changes chapter compared correlation cranial base cranial capacity cranial vault cranium DATA LOCATION EXPERIMENT day after conception dental dimensions discussed effect environment environmental even-numbered rats experimental conditions experimental groups factors figs film formalin genetic Graph Means growth pattern histological hypothalamus incisor Incr increments indicated inter-group differences investigation large litters large-litter rats larger lead acetate less litter-size Log-Log Graph longitudinal studies M₁ mandible measurements mesio-distal method midsagittal plane molar segment Morphogenesis mother normal observations obtained occurred odd-numbered rats plane of nutrition points possible post-conception previous experiment Quantity random number records reduced relationship relative samples seen showed significant difference significantly small litters small-litter rats smaller sphenoid bone stage 9 standard deviations Student's t-test Table Longit tail taken undernutrition University of Nymegen variation weaning Widdowson and McCance Wistar rats x-ray pictures