Results 121 to 130 of about 351 (146)
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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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The effect of allatectomy on the blood trehalose in the female housefly, Musca domestica L
Comparative Biochemistry and Physiology Part A: Physiology, 1973Abstract 1. 1. After allatectomy, the blood trehalose concentration in the female housefly increased steadily from 33 μg/μl of blood on the first day to 48·6 μg/μl on the fourth day. 2. 2. In the sham-operated flies blood trehalose concentration fluctuated considerably and was lower. 3. 3.
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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.
Hugh E. Vroman +2 more
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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.
Hugh E. Vroman +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. Kikukawa, 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. Kikukawa, S.S. Tobe
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Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1977
1. Kinetic properties of adult Phormia fat body glycogen synthetase were studied and compared to other animals. The KM for UDPG is 2.82 mM, decreasing to 0.58 mM in the presence of G-6-P. 2. The specific activity of fat body glycogen synthetase shows a reduction of 30% within 2 days after allatectomy. 3.
A C, Chen, S, Friedman
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1. Kinetic properties of adult Phormia fat body glycogen synthetase were studied and compared to other animals. The KM for UDPG is 2.82 mM, decreasing to 0.58 mM in the presence of G-6-P. 2. The specific activity of fat body glycogen synthetase shows a reduction of 30% within 2 days after allatectomy. 3.
A C, Chen, S, Friedman
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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, 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.
M, Pines +3 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.
M, Pines +3 more
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Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie, 1989
To continuously monitor ovipositor movements a new actograph was devised; it was composed of a radioelement glued at the ventral tip of the ovipositor, a scintillation probe to detect ovipositor movements and a microcomputer to store and process data. Immature and mature virgin females were able to perform ovipositor movements.
M, Renucci +3 more
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To continuously monitor ovipositor movements a new actograph was devised; it was composed of a radioelement glued at the ventral tip of the ovipositor, a scintillation probe to detect ovipositor movements and a microcomputer to store and process data. Immature and mature virgin females were able to perform ovipositor movements.
M, Renucci +3 more
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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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Archives of Insect Biochemistry and Physiology, 1997
In last instar larvae of Gryllus bimaculatus, the prothoracic glands as well as the ovary and the abdominal integument synthesize and release ecdysteroids. Ovariectomy of day (d) 1 penultimate instar larvae extended the last larval stadium from 8 to 12 days (at 27°C).
Klaus H. Hoffmann, Brigitte Gerstenlauer
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In last instar larvae of Gryllus bimaculatus, the prothoracic glands as well as the ovary and the abdominal integument synthesize and release ecdysteroids. Ovariectomy of day (d) 1 penultimate instar larvae extended the last larval stadium from 8 to 12 days (at 27°C).
Klaus H. Hoffmann, Brigitte Gerstenlauer
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