Results 101 to 110 of about 179 (132)
Effect of Allatectomy, Brain-Cauterization and Juvenoid Treatment on the Activity of some Cellular Enzymes of Schizodactylus Monstrosus Drury [PDF]
International Journal of Tropical Insect Science, 1982 Changes in the activities of general esterase, l-alanine:2-oxoglutarate aminotransferase (GPT), l-aspartate:2-oxoglutarate aminotransferase (GOT), acid and alkaline phosphatase after allatectomy, brain-cauterization and juvenoid treatment have been studied.
Sanjay Mandal +2 more
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Journal of Insect Physiology, 1986
Abstract Using an in vitro radiochemical assay, rates of juvenile hormone III biosynthesis/release by the corpora allata were determined in female larvae (1st–4th instars) of the cockroach, Diploptera punctata. Higher rates were observed principally in the latter half of the 1st–3rd stadia, whereas juvenile hormone release was undetectable in the ...
S S Tobe
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Abstract Using an in vitro radiochemical assay, rates of juvenile hormone III biosynthesis/release by the corpora allata were determined in female larvae (1st–4th instars) of the cockroach, Diploptera punctata. Higher rates were observed principally in the latter half of the 1st–3rd stadia, whereas juvenile hormone release was undetectable in the ...
S S Tobe
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Journal of Insect Physiology, 1965
Abstract The control of the corpora allata over lipid biosynthesis and turnover was studied in the American cockroach, Periplaneta americana (L.), by using 1- 14 C-acetate as a precursor. The labelled acetate was injected into allatectomized and control roaches and the time-curve of the appearance of label in lipid fractions was determined.
W E Robbins
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Abstract The control of the corpora allata over lipid biosynthesis and turnover was studied in the American cockroach, Periplaneta americana (L.), by using 1- 14 C-acetate as a precursor. The labelled acetate was injected into allatectomized and control roaches and the time-curve of the appearance of label in lipid fractions was determined.
W E Robbins
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Journal of Insect Physiology, 1987
Abstract The physiological control mechanisms of calling, pheromone production, and pheromone release in female gypsy moths were investigated. No involvement of the corpora allata was found since mean pheromone emission rates from females allatectomized as larvae (14.1 ng/h) were not significantly different from sham-operated (16.4 ng/h ...
J.D. Tang +3 more
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Abstract The physiological control mechanisms of calling, pheromone production, and pheromone release in female gypsy moths were investigated. No involvement of the corpora allata was found since mean pheromone emission rates from females allatectomized as larvae (14.1 ng/h) were not significantly different from sham-operated (16.4 ng/h ...
J.D. Tang +3 more
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Journal of Insect Physiology, 1971
Abstract The effect of allatectomy on the changes in fat body lipid metabolism during adult development of the male desert locust ( Schistocerca gregaria ) has been investigated. All the operations were carried out 4 days after adult emergence. Allatectomy had no appreciable effect on the specific activity of acetate incorporation into lipid, but ...
Walker, P., Bailey, E.
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Abstract The effect of allatectomy on the changes in fat body lipid metabolism during adult development of the male desert locust ( Schistocerca gregaria ) has been investigated. All the operations were carried out 4 days after adult emergence. Allatectomy had no appreciable effect on the specific activity of acetate incorporation into lipid, but ...
Walker, P., Bailey, E.
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Journal of Insect Physiology, 1981
Abstract A possible causal relationship between the switch-over from eupyrene to apyrene spermatogenesis and pupation in Lepidoptera was examined in Actias selene. Precocious pupation, 11 days earlier than in the controls, was induced by allatectomy on the first day of the penultimate larval instar.
G Benz
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Abstract A possible causal relationship between the switch-over from eupyrene to apyrene spermatogenesis and pupation in Lepidoptera was examined in Actias selene. Precocious pupation, 11 days earlier than in the controls, was induced by allatectomy on the first day of the penultimate larval instar.
G Benz
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General and Comparative Endocrinology, 1980
Abstract Allatetomy of female locusts at an early stage of oocyte maturation halts subsequent development of terminal oocytes, but this is not due to lack of vitellogenin in the hemolymph. The fat body ceases to secrete vitellogenin in vivo shortly after allatectomy.
Mark Pines +2 more
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Abstract Allatetomy of female locusts at an early stage of oocyte maturation halts subsequent development of terminal oocytes, but this is not due to lack of vitellogenin in the hemolymph. The fat body ceases to secrete vitellogenin in vivo shortly after allatectomy.
Mark Pines +2 more
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Journal of Insect Physiology, 1971
Abstract Allatectomy in the final instar larvae of Spodoptera littoralis resulted in miniature adults. Ablation of the corpora allata from the fifth instar larvae, however, led to premature pupation omitting the sixth instar. The pharate pupae obtained ecdysed into midget pupae that did not develop into adults. Mated with intact (unoperated) males,
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Abstract Allatectomy in the final instar larvae of Spodoptera littoralis resulted in miniature adults. Ablation of the corpora allata from the fifth instar larvae, however, led to premature pupation omitting the sixth instar. The pharate pupae obtained ecdysed into midget pupae that did not develop into adults. Mated with intact (unoperated) males,
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General and Comparative Endocrinology, 1978
Using a direct radiochemical assay, the effects of implantation of supernumerary corpora allata (CA), unilateral allatectomy, and ovariectomy on rates of juvenile hormone (JH) biosynthesis by the CA and on the duration of the gonotrophic cycle have been investigated during the first gonotrophic cycle of the viviparous cockroach Diploptera punctata ...
Stephen Tobe, Barbara Stay
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Using a direct radiochemical assay, the effects of implantation of supernumerary corpora allata (CA), unilateral allatectomy, and ovariectomy on rates of juvenile hormone (JH) biosynthesis by the CA and on the duration of the gonotrophic cycle have been investigated during the first gonotrophic cycle of the viviparous cockroach Diploptera punctata ...
Stephen Tobe, Barbara Stay
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Journal of Insect Physiology, 1979
Abstract End products of tryptophan metabolism in Carausius morosus are the ommochromes ommin and xanthommatin in the epidermis, and kynurenic acid in the faeces. During larval and adult life ommochromes and mainly kynurenic acid are formed. The concentration of kynurenic acid in the faeces of adult females is 2.5 times lower than in the larvae and ...
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Abstract End products of tryptophan metabolism in Carausius morosus are the ommochromes ommin and xanthommatin in the epidermis, and kynurenic acid in the faeces. During larval and adult life ommochromes and mainly kynurenic acid are formed. The concentration of kynurenic acid in the faeces of adult females is 2.5 times lower than in the larvae and ...
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