Results 141 to 150 of about 2,970 (183)

Neuropeptides in the regulation of Rhodnius prolixus physiology

Journal of Insect Physiology, 2017
In the kissing bug Rhodnius prolixus, events such as diuresis, antidiuresis, development and reproduction are triggered by blood feeding. Hence, these events can be accurately timed, facilitating physiological experiments. This, combined with its relatively big size, makes R. prolixus an excellent model in insect neuroendocrinological studies.
openaire   +2 more sources

The biological activity of diuretic factors in Rhodnius prolixus

Peptides, 2002
The rapid post-feeding diuresis of Rhodnius prolixus is under neurohormonal control and involves the integrated activity of the crop, Malpighian tubules and hindgut. One of the factors which is involved in this rapid diuresis is serotonin, however a peptide(s) is also considered to be involved.
V A, Te Brugge, D A, Schooley, I, Orchard   +2 more
openaire   +2 more sources

Hydrocarbons of Rhodnius prolixus, a Chagas disease vector

Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, 2001
The surface hydrocarbons of the blood-sucking insect, Rhodnius prolixus, a major Chagas disease vector in Venezuela, Colombia and Central America, were characterized by capillary gas chromatography coupled to mass spectrometry (CGC-MS). A total of 54 single or multicomponent peaks of saturated, straight-chain and methyl-branched hydrocarbons were ...
P, Juárez, G J, Blomquist, C J, Schofield   +2 more
openaire   +2 more sources

On the biosynthesis of Rhodnius prolixus heme-binding protein

Insect Biochemistry and Molecular Biology, 2002
The biosynthesis of Rhodnius prolixus heme-binding protein (RHBP), which is present in the hemolymph and oocytes of Rhodnius prolixus, was investigated. Fat bodies of female insects incubated in vitro with 14C-leucine were able to synthesize and secrete 14C-RHBP to the culture medium.
G O, Paiva-Silva, M H F, Sorgine, C E, Benedetti, R, Meneghini, I C, Almeida, E A, Machado, M, Dansa-Petretski, G, Yepiz-Plascencia, J H, Law, P L, Oliveira, H, Masuda   +10 more
openaire   +2 more sources

Molecular characterization of Rhodnius prolixus' embryonic cuticle

Insect Biochemistry and Molecular Biology, 2014
The embryonic cuticle (EC) of Rhodnius prolixus envelopes the entire body of the embryo during hatching and provides physical protection, allowing the embryo to pass through a narrow chorionic border. Most of the knowledge about the EC of insects is derived from studies on ultrastructure and secretion processes during embryonic development, and little ...
Paula S, Souza-Ferreira, Mônica F, Moreira, Geórgia C, Atella, Ana Lúcia, Oliveira-Carvalho, Roberto, Eizemberg, David, Majerowicz, Ana C A, Melo, Russolina B, Zingali, Hatisaburo, Masuda   +8 more
openaire   +2 more sources

Ecdysone, juvenile hormone and oögenesis in Rhodnius prolixus

Journal of Insect Physiology, 1979
Oviposition and oogenesis can be inhibited in female Rhodnius prolixus by ecdysone given by the digestive tract. The inhibition is dose-dependent, and doses higher than 4.0 ng ecdysone/mg body weight drastically reduce the size and shape of the whole ovaries.
M L, Garcia, R P, Mello, E S, Garcia
openaire   +2 more sources

The biochemical basis of tolerance to malathion in Rhodnius prolixus

Comparative Biochemistry and Physiology Part C: Comparative Pharmacology, 1990
1. LC50 of malathion, fenitrothion and lindane were determined in R. prolixus and T. infestans. R. prolixus was shown to be tolerant to malathion. 2. The penetration rate of (14C)-malathion into R. prolixus and T. infestans was similar. 3. Acetylcholinesterase from R. prolixus heads was 3.3-fold less sensitive to inhibition by malaoxon than the similar
M I, Picollo de Villar, A, Fontan, E, Wood, E, Zerba   +3 more
openaire   +2 more sources

The Later Embryology of Rhodnius prolixus

Journal of Cell Science, 1936
ABSTRACT The development of the external features of the embryo from the time at which the germ-layers are laid down until hatching is described. The fate of the embryonic membrane is followed, and the formation of a ‘cuticular’ layer round the whole embryo produced by the glands which result from the modification of the first abdominal ...
openaire   +1 more source

Insulin-like immunoreactivity and molting in Rhodnius prolixus

General and Comparative Endocrinology, 1992
Two prominent cells were observed when fifth stage Rhodnius female larval brains were stained with anti-insulin serum. The staining intensity of these cells varied during the instar, being lowest on Day 1 and Days 5 and 6 after feeding. Injection of anti-insulin serum into 5th stage larvae immediately after feeding and on Days 4 and 5 in females and on
V M, Sevala, V L, Sevala, B G, Loughton, K G, Davey   +3 more
openaire   +2 more sources

Synthesis of vitellogenin by the follicle cells of Rhodnius prolixus

Insect Biochemistry and Molecular Biology, 2000
The synthesis and secretion of vitellogenin by the ovary of Rhodnius prolixus was investigated. Using whole ovary or epithelial cells isolated from follicles of different sizes, it is shown that the follicle cells are a site of synthesis for this protein in the ovary.
A C, Melo, D, Valle, E A, Machado, A P, Salerno, G O, Paiva-Silva, N L, Cunha E Silva, W, de Souza, H, Masuda   +7 more
openaire   +2 more sources