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Discontinuous respiration in insects. II. The direct measurement and significance of changes in tracheal gas composition during the respiratory cycle of silkworm pupae.
Experiments were conducted to determine (a) the partial pressure gradients driving oxygen into and carbon dioxide out of the tracheal system of silkworm pupae with discontinuous respiration and (b)Expand
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Histological analysis of the dynamics of growth of imaginal discs and histoblast nests during the larval development ofDrosophila melanogaster
Summary1.Histological analyses were made of imaginal discs and histoblasts during the larval development ofDrosophila melanogaster to determine the number of cells, the patterns of cell division andExpand
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DISCONTINUOUS RESPIRATION IN INSECTS: ROLE OF THE SPIRACLES
1. Experiments were conducted to examine the role of the spiracles in discontinuous respiration, to define the kinds of behavior that spiracles can show, and to clarify the manner in which trachealExpand
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Roles of oxygen and carbon dioxide in the control of spiracular function in Cecropia pupae.
In most insects spiracular valve movements are controlled by oxygen and carbon dioxide (Beckel and Schneiderman, 1957 ; Schneiderman, 1960 ; Levy and Schneiderman, 1966a, 1966b) . When theExpand
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Restoration of fertility in sterilized Drosophila eggs by transplantation of polar cytoplasm.
Abstract A technique for transplantation of cytoplasm between Drosophila eggs is described. Polar cytoplasm of newly laid eggs was first made ineffective for the determination of germ cells by UVExpand
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Discontinuous respiration in insects. IV. Changes in intratracheal pressure during the respiratory cycle of silkworm pupae.
Pupae of Hyalophora cecropia have no active respiratory movements except those of the spiracular valves, yet they have discontinuous respiration. Carbon dioxide is retained and released in burstsExpand
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Regulation and metamorphosis of the abdominal histoblasts ofDrosophila melanogaster
SummaryThe development of the adult abdomen ofDrosophila melanogaster was analyzed by histology, microcautery, and genetic strategies. Eight nests of diploid histoblasts were identified in the newlyExpand
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Discontinuous respiration in insects—V. Pressure and volume changes in the tracheal system of silkworm pupae
Abstract Previous studies have indicated that intratracheal barometric pressure is a significant parameter of respiration which may prove useful in the analysis of insect respiration in general andExpand
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CONTROL OF GROWTH AND DEVELOPMENT IN INSECTS.
REPORTS Fission-Track Ages and Track-Annealing Behavior of Some Micas: R. L. Fleischer et al. 349 Geomagneti Polarity Epochs: A . Cox, R. R. Doell, G. . Dalrymple . .. G.ib 35 High-Pressure MetallicExpand
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The development of the imaginal abdomen of Drosophila melanogaster.
Abstract The development of the imaginal Drosophila melanogaster was investigated by an analysis of clones of cells marked by somatic crossing-over. The results showed that each abdominal halfExpand
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