| 5-hydroxytryptamine: a second diuretic hormone in rhodnius prolixus. | bioassays of 5-hydroxytryptamine (5-ht) in fifth-instar rhodnius prolixus haemolymph using calliphora salivary glands indicate that: (1) biologically active 5-ht is present, (2) in unfed animals there is not enough 5-ht to stimulate malpighian tubule fluid secretion, and (3) there is enough 5-ht soon after the initiation of feeding to stimulate rapid tubule secretion. the 5-ht receptor antagonists ketanserin and spiperone reversibly and selectively inhibit 5-ht-induced fluid secretion, indicatin ... | 1991 | 2051136 |
| effects of proallatotoxins (precocenes) on the development and reproduction of rhodnius prolixus: some data. | proallatotoxins, and particularly precocenes, are exceptionally promising models for studying rhodnius prolixus physiology and for comparison with other natural compounds with antihormonal activities. effects of precocenes on feeding, development and reproduction of r. prolixus are being detailed. the precocenes reveal significant effects on feeding, moulting cycle (inducing precocious metamorphosis and ecdysial stasis), and reproduction of these insects. the mechanism of action of proallatotoxi ... | 1991 | 1841983 |
| binding sites for igg-fc in hemocyte adherent cells of hematophagous bugs (rhodnius prolixus). | | 2006 | 2152199 |
| short- and long-term effects of azadirachtin a on development and egg production of rhodnius prolixus. | azadirachtin a was given through a blood meal to 4th-instar larvae and to adult females of rhodnius prolixus. development (ecdysis) and egg production were inhibited in a dose-dependent manner. long-term experiments with subsequent four feedings on azadirachtin-free blood were performed with 4th-instar larvae and with adult females. only in the low-dose azadirachtin larval groups (0.01 and 0.1 microgram/ml of blood), development was partially restored; after a single 1.0 microgram/ml treatment a ... | 2015 | 2215221 |
| the biochemical basis of tolerance to malathion in rhodnius prolixus. | 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 enzyme of t. infestans. 4. r. prolixus showed more activity of gsh-s-transferases against dcnb than t. infestans. 5. the in vitro degradation of ... | 1990 | 1703470 |
| sex differences in the profiles of prothoracic gland synthetic activity and of hemolymph ecdysteroid titers during development in the last larval instar of rhodnius prolixus (hemiptera). | the synthesis of ecdysteroids by prothoracic glands (pgs) of rhodnius prolixus was measured in vitro by radioimmunoassay in both male and female larvae following initiation of development in the last larval instar by a blood meal. neither ecdysteroid synthesis nor hemolymph titer differ between the sexes during the first few days following a blood meal. however, on day 4 the pgs of female larvae commence a surge of increased synthesis, while in males this surge does not commence until day 5. thi ... | 1989 | 2583469 |
| a subpopulation of dorsal unpaired median neurons in the blood-feeding insect rhodnius prolixus displays serotonin-like immunoreactivity. | we describe, for the first time in insects, the presence of serotonin-like immunoreactive dorsal unpaired median (dum) neurons. in unfed, untreated rhodnius prolixus, the cell bodies of these dum neurons displayed only faint serotonin-like immunofluorescence without any detectable fluorescence in the axons. there was, however, an extensive serotonin-like immunoreactive peripheral complex. we have enhanced the immunostaining of the cell bodies and axons of these dum neurons by using 5,7-dihydroxy ... | 1989 | 2681279 |
| developmental and diurnal changes in ecdysteroid biosynthesis by prothoracic glands of rhodnius prolixus (hemiptera) in vitro during the last larval instar. | the synthesis of ecdysteroids by prothoracic glands (pgs) of male last instar larvae of rhodnius prolixus was measured in vitro by radioimmunoassay throughout the course of larval-adult development. large and systematic changes in relative rates of synthesis occur during development. two bursts of elevated synthetic activity were found. the first commences as soon as development is initiated by a blood meal and lasts approximately 1 day. the second commences 4 days later and increases progressiv ... | 1989 | 2663631 |
| pattern and composition of ionic currents around ovarioles of the hemipteran, rhodnius prolixus (stahl). | two-dimensional vibrating probe analysis of extracellular currents around rhodnius prolixus ovarioles correlated with an earlier one-dimensional analysis but revealed asymmetrical circumferential current patterns and large tangential currents. na+, k+, and ca+2 have been tentatively identified as the major ions involved in these currents, with na+ being the major ion involved in current efflux. | 1989 | 29300571 |
| the development of microtubular arrays in the germ tissue of an insect telotrophic ovary. | the microtubular arrays characteristic of the trophic core and cords of the adult rhodnius prolixus ovary develop prior and during the larval--adult transformation. development of the microtubules was revealed by immunocytochemistry, electron microscopy and polyacrylamide electrophoresis and western blot analysis. microtubular arrays were first detected in the trophic cords and presumptive trophic core 6 days before the adult molt. cord microtubules increase in length and numbers as the trophic ... | 1989 | 2672416 |
| a novel receptor capable of monitoring applied pressure in the abdomen of an insect. | a pair of receptors, responding tonically to pressure applied internally, occurs on the ventral body wall of abdominal segments two to five in the adult of the blood-feeding insect, rhodnius prolixus. these receptors are located in a region of the body wall subject to forces directly related to the size and movement of the stomach, an enlarged region of the midgut which stores the blood meal, and are therefore well suited for monitoring the degree of distension there. the initiation of many endo ... | 1988 | 17820895 |
| a relationship between the inhibition of heparan sulfate and chondroitin sulfate synthesis and the inhibition of molting by selenate in the hemipteran rhodnius prolixus. | the insect rhodnius prolixus synthesizes heparan sulfate and chondroitin sulfate after a blood meal containing [35s]-inorganic sulfate. a 40 to 80% inhibition of heparan sulfate synthesis was obtained when the meal was supplemented with 10(-5) and 10(-4) m sodium selenate respectively. likewise an inhibition of the molting in the order of 30 to 60% was observed when the insects were fed with blood containing 10(-5) and 10(-4) m selenate respectively. the insects after a subsequent meal without s ... | 1987 | 2956948 |
| short- and long-term effects of proallatotoxin (ethoxyprecocene ii) on rhodnius prolixus females. | oogenesis and oviposition can be inhibited in female of rhodnius prolixus by means of short-term experiment (first reproductive cycle) of a single dose of ethoxyprecocene ii given by ingestion. the inhibition is dose-dependent as measured by oocyte growth, egg maturation and egg deposition. in a long-term experiment (second and third reproductive cycles) egg production and oogenesis can be partially or totally re-established by subsequent blood meals without ethoxyprecocene ii. these findings su ... | 2006 | 3333534 |
| the roles of haemolymphatic lipoproteins in the oogenesis of rhodnius prolixus. | the fates of purified 32p-vitellin and 32p-lipophorin were followed in vitellogenic females of rhodnius prolixus. while the radioactivity from 32p-vitellin 6 hours after injection was found almost exclusively in the ovary, the radioactivity from injected 32p-lipophorin was found distributed among several organs. in the ovary, the radioactivity from 32p-vitellin was associated with the contents of the yolk granules. 32p-lipophorin delivered a great amount of radioactive phospholipids to the ovary ... | 1987 | 3334405 |
| effects of precocene and azadirachtin in rhodnius prolixus: some data on development and reproduction. | the results presented in this paper clearly indicate that precocene and azadirachtin are effective inhibitors of moulting and reproduction in the hemipteran rhodnius prolixus. the time of application is important and only applications of these substances early in the intermoulting period cause their effects in nymphs. the inhibition of moulting is fully reversed by ecdysone therapy. precocene and azadirachtin also affected drastically the oogenesis and egg deposition in this insect. precocene-in ... | 1987 | 3334403 |
| inputs to the hormonal control of egg development in rhodnius prolixus. | this paper re-examines existing data on the environmental inputs governing egg production in rhodnius prolixus. feeding has a direct effect on egg production such that the product of the unfed weight of the female times the weight of the blood meal is a good predictor of the number of eggs produced. mating modifies this input, so that mated females produce more eggs. egg production is governed by the corpus allatum, and indirect evidence suggests that the number of eggs producted by a female is ... | 1987 | 3334399 |
| demonstration of a proallatotoxin-sensitive period in 4th-instar nymphs of rhodnius prolixus. | 1. topical application of the proallatotoxin ethoxyprecocene ii (60 micrograms/nymph) to 4th-instar nymphs of rhodnius prolixus at various times before and after a blood meal induced precocious metamorphosis. 2. the highest percentage of adultoids was obtained when proallatotoxin was applied prior to feeding or up to day 3 after the blood meal. 3. the proallatotoxin-sensitive period ended 4 days after feeding just before the maximum peak of ecdysteroid concentration in the hemolymph. 4. the sign ... | 1987 | 3318976 |
| induction of rhythmic modulation of haemolymph ecdysteroids in the insect rhodnius prolixus by treatments which elicit rhythmic ecdysis. | the titer of moulting hormones (ecdysteroids) in fifth instar male rhodnius displays a gradual decline throughout the week preceding ecdysis when animals are maintained in constant light (ll). multiple sampling of haemolymph from the same animal reveals a constant rate of decline with no increases in titer observed. however, 20-hydroxyecdysone (20he) provokes increases in the titer of ecdysteroids which occur between 18 and 27 hr after injection. multiple injections of 20he provoke regular chang ... | 1986 | 3557060 |
| salivary apyrase of rhodnius prolixus. kinetics and purification. | the salivary apyrase activity of the blood-sucking bug rhodnius prolixus was found to reside in a true apyrase (atp diphosphohydrolase, ec 3.6.1.5) enzyme. the crude saliva was devoid of 5'-nucleotidase, inorganic pyrophosphatase, phosphatase and adenylate kinase activities. atp hydrolysis proceeded directly to amp and pi without significant accumulation of adp. km values for atp and adp hydrolysis were 229 and 291 microm respectively. ki values for atp and adp inhibition of adp and atp hydrolys ... | 1986 | 3010945 |
| nurse cell-oocyte interaction: a new f-actin mesh associated with the microtubule-rich core of an insect ovariole. | fluorescent staining of rhodnius prolixus ovarioles with rhodaminylphalloidin revealed an elaborate interconnecting meshwork of f-actin encasing the microtubule rich core. the thick actin struts have branches extending partially into the nurse cell lobes extending from the syncytical core. basally the network ends at the nurse cell-pre-follicular interface and does not extend into the trophic cords. light microscopy, tem and sem show the dense fibrous struts have numerous branch points creating ... | 1986 | 18620180 |
| experimental analysis of rhodnius prolixus (insecta, hemiptera) embryogenesis. | | 1986 | 3749156 |
| efficacy of ivermectin against the bloodsucking insect, rhodnius prolixus (hemiptera, triatominae). | ivermectin (0.2 mg/kg body weight) caused a high mortality in nymphs and adults of rhodnius prolixus following a single meal in mice sub-cutaneously injected with the drug. this effect was more evident in nymphs of 1st-and 2nd-instar than in older nymphs and adults. third-instar nymphs presented a high mortality when fed on mice treated with ivermectin 24 and 48 hours previously, while mortality was significantly reduced in nymphs fed on mice treated 72 hours before. surviving 3rd-instar nymphs ... | 2006 | 3915765 |
| [the teratogenic and toxic effect of unsaturated short-chain fatty acids in rhodnius prolixus]. | the teratogenic role of two short-chain unsaturated fatty acids, octinoic acid and undecylenic acid on the hemimetabolic metamorphosis of the insect rhodnius prolixus (hemipter) is studied. the acids penetrate through the cuticle of the abdomen and tarsi, independently of the amount of distention. the effects are registered equally in satiated or hungry insects, in those treated topically or in those where the treatment was applied to the support paper. the acids apparently do not affect the for ... | 2006 | 3915763 |
| circadian control of a daily rhythm in hemolymph ecdysteroid titer in the insect rhodnius prolixus (hemiptera). | the hemolymph levels of the insect molting hormone (ecdysteroid) during the week preceding ecdysis in fifth-instar male rhodnius prolixus have been determined using a radioimmunoassay. when animals are kept on light-dark cycles, the titer displays massive daily increases and decreases producing a daily rhythm. this rhythm is maintained with a period of approximately 24 hr in continuous darkness. the free-running period of the rhythm was determined at 24 and 28 degrees and found to be temperature ... | 1985 | 4043725 |
| variations during the gonotrophic cycle in the titer of the myotropic ovulation hormone and the response of the ovarian muscles in rhodnius prolixus. | the response of the ovarian muscles to a standard preparation of the myotropic ovulation factor from identified neurosecretory cells in the brain of rhodnius prolixus increases after feeding in both virgin and mated females. this increase is unaffected by removal of the neurosecretory cells and by increases imposed on the resting tension of the ovaries used in the bioassay. the hemolymph titer of the myotropic activity as determined by bioassay exhibits a peak after feeding in both mated and vir ... | 1985 | 3891505 |
| glial cell contacts in insects: effects of feeding on intercellular junctions. | the intercellular junctions associated with the modified glial cells of the perineurium have been examined in the ganglia and main abdominal nerves of the blood-sucking bug rhodnius prolixus, both before and and after feeding, by means of freeze-fracture and tracer studies. it was found that the pleated septate junctions found in the main abdominal nerve have many fewer septa than those found in the ganglion. these junctions appear to provide the flexibility needed for the movement of cells whic ... | 1985 | 18620150 |
| [morphogenetic effects of precocene ii on nymphs of rhodnius prolixus (stal, 1859) (hemiptera-triatominae)]. | the morphogenetic effects of precocene ii in nymphs of 1st-, 2nd-, 3rd-, and 4th-instar of rhodnius prolixus were studied. a high number of insects underwent precocious metamorphosis by topical treatment (10-30 micrograms/insect) or adding the drug to the blood meal (25 micrograms/ml of blood). adultoids of 4th- and 5th-instar, obtained by both treatments of 3rd- and 4th-instar, respectively, had mainly fully adult abdominal cuticle, ocelli, three segmented tarsi, rudimentary wings containing ad ... | 2015 | 6398392 |
| serotonin modulation of the release of sequestered [3h]serotonin from nerve terminals in an insect neurohemal organ in vitro. | exogenous tritiated serotonin ([3h]5-ht) is taken up by and released from serotonin-containing fibers within abdominal nerves of rhodnius prolixus during in vitro incubations. sequestered [3h]5-ht behaves as expected of an endogenous neurosecretory product in this system. release is ca2+-dependent during both k+-induced and physiologically induced secretory episodes. the kinetics of the release of sequestered label parallels the kinetics of release of endogenous neurohormones. preloaded preparat ... | 1984 | 6380644 |
| cytological evidence for serotonin-containing fibers in an abdominal neurohemal organ in a hemipteran. | the abdominal neurohemal organs of the hemipteran rhodnius prolixus contain an extensive serotonin containing arborization. endogenous serotonin within fibers and terminals in the neurohemal area were detected with histochemical and immunocytological techniques. the abdominal nerves which contain the neurohemal organs selectively sequester exogenous serotonin. serotonin and its metabolites are biochemically detected within the mesothoracic ganglion, which is a known source of projections into th ... | 1984 | 6380643 |
| cytophysiological correlations between prothoracic gland activity and hemolymph ecdysteroid concentrations in rhodnius prolixus during the fifth larval instar: further studies in normal and decapitated larvae. | hemolymph ecdysteroid titers in fifth instar larvae of rhodnius prolixus were determined by radioimmunoassay, and their prothoracic glands were excised and examined by electron microscopy. during the last larval instar, the titer of ecdysteroid increased between the head-critical period until day 13, at which time the peak titer was 3100 pg 20-hydroxyecdysone equivalents/microliter. the activation of secretory cells at the time of the second period of prothoracicotropic hormone release was corre ... | 1984 | 6370785 |
| [action of altozar, altozide sr-10 and derivatives of farnesylic and 3,11-dimethyl-2-dodecenoic acids on rhodnius prolixus stal. bugs]. | | 2012 | 6355802 |
| diphosphoglycerate rather than atp as a physiological phagostimulant factor for rhodnius prolixus. | | 1983 | 6339262 |
| [effect of the desiccant dry-die-67 on rhodnius prolixus stal. bugs]. | | 2009 | 6341798 |
| ovarian motility in mated rhodnius prolixus requires an intact cerebral neurosecretory system. | | 1982 | 7129081 |
| diphosphoglycerate and phytic acid as feeding stimulants for the blood-feeding bug rhodnius prolixus. | 1. the compounds 2,3-diphosphoglycerate (dpg), phytic acid (pa) and adenosine triphosphate (atp) were tested as gorging stimulants for rhodnius prolixus. all three are potent phagostimulants, with ed50 values less than 10 microm; in contrast, only atp stimulates the black fly simulium venustum, with an ed50 of 13 microm. 2. equimolar mixtures of dpg and atp showed pronounced synergism, causing 75% of test r. prolixus to gorge at a dose of 0.3 microm. 3. the response to dpg and pa supports the hy ... | 1982 | 6124351 |
| effects of ecdysone on the metamorphosis and ecdysis prevention induced by precocene ii in rhodnius prolixus. | | 1981 | 7026357 |
| platelet antiaggregating activity in the salivary secretion of the blood sucking bug rhodnius prolixus. | | 1981 | 7016577 |
| development of nurse cell-oocyte interactions in the insect telotrophic ovary (rhodnius prolixus). | the establishment of reorganization of intercellular bridges during larval-adult ovarian differentiation is the basis of the syncytial nature of the adult hemipteran telotrophic ovary. the formation, in the late differentiation phase, of groups of closely arranged nurse cell nuclei occupying a common cytoplasm results from membrane fusions. oocyte-oocyte intercellular bridge systems later are modified to form the trophic cords. the trophic core, which undergoes a restructuring during the late di ... | 1981 | 7031984 |
| [action of baytex on the eggs of rhodnius prolixus stal. bugs]. | | 2013 | 7010109 |
| [effect of the knockdown caused by the gamma isomer of hexachlorocyclohexane on the feeding, copulation and fertility capacity of rhodnius prolixus stal. bugs]. | | 2013 | 6163070 |
| effects of a mammalian cholesterol biosynthesis inhibitor on adipocyte ultrastructure and metamorphosis in rhodnius prolixus (hemiptera). | a potent inhibitor of cholesterol biosynthesis in rodents [bmva; 5-(4-biphenylyl)-3-methylvaleric acid] inhibits metamorphosis of 4th stage larvae of the blood-sucking bug rhodnius prolixus. | 1980 | 6998718 |
| electrical activity of neurosecretory axons from the brain of rhodnius prolixus: relation of changes in the pattern of activity to endocrine events during the moulting cycle. | ongoing electrical activity was recorded from the axons of neurosecretory cells from the brain of 5th instar rhodnius prolixus throughout the moulting cycle. dramatic changes in both the frequency and pattern of electrical activity occur at specific times during the cycle, enabling the timing of release of neurohormones from the brain to be inferred. the level of transport of stainable secretion appears to be closely coupled to the electrical activity at all times. activity is low in unfed rhodn ... | 1980 | 7378760 |
| the development of the female accessory gland in the insect rhodnius prolixus. | the specialized cell types and two distinct regions of the adult rhodnius prolixus cement gland develop from a simple pseudostratified epithelial tube during the 20-22 days of the fifth stadium. feeding initiates the first phase, proliferation. cells round up and divide tangentially to the lumen. following the proliferation phase, differentiative mitoses occur and differentiation, resulting in secretory units (consisting of a ductule, gland cell and cuticular lining), ensues in the distal region ... | 1980 | 7010677 |
| development and cellular differentiation of an insect telotrophic ovary (rhodnius prolixus). | differentiation events accompanying the larval-adult ovarian transformation in rhodnius prolixus can be divided into three phases: proliferative phase (unfed to 3 days post-feed or dpf), early differentiation phase (9-15 dpf) and late differentiation phase (16 dpf to moult at 21 dpf). ovarioles remain morphologically larval until feeding initiates development. the unfed ovariole contains germ cells surrounding a central trophic core region with the 'germarial lumen' occupying the basal region of ... | 1980 | 7010676 |
| the ultrastructure of the female accessory gland, the cement gland, in the insect rhodnius prolixus. | the cement gland of rhodnius prolixus is an epidermally derived tubular gland consisting of a distal synthetic region and a proximal muscular duct region. the synthetic region consists of numerous secretory units joined to a central chitinous duct via cuticular ductules. proteinaceous secretion, synthesized by the goblet-shaped secretory cell, passess through the delicate cuticular lattice of a ductule-end apparatus and out through fine ductules to the central duct. secretory cells are rich in r ... | 1980 | 7001676 |
| effect of diet viscosity on the operation of the pharyngeal pump in the blood-feeding bug rhodnius prolixus. | 1. the rate of pumping and total number of pump strokes was recorded whilst rhodnius prolixus fed on measured amounts of artificial diets. 2. increasing the viscosity of the diet caused a decline in both the frequency with which the pharyngeal pump operates and the average stroke volume of the pump. 3. in 5th-instar rhodnius, the stroke volume tends toward a maximum value of about 60 nl at viscosities lower than about 3 cp. 4. feeding rates (volume per unit time) agree with poiseuille's law at h ... | 1979 | 11799696 |
| an unusual cell surface modification: a double plasma membrane. | the occurrence of an unusual double plasma membrane structure is reported; it has been studied in conventional thin sections, after lanthanum-impregnation and with freeze-fracturing. this modification of the plasmalemma is found where the luminal cell membrane (i membrane) of gut microvilli in the haematophagous insect, rhodnius prolixus, is surrounded by a second, outer membrane (o membrane), the 2 separated from one another by a highly regular i-o space of about 10 nm. lanthanum impregnation r ... | 1979 | 528589 |
| changes in hormone activity of single neurosecretory cell bodies during a physiological secretion cycle. | single neurosecretory cell bodies were dissected from the ventral ganglionic mass of rhodnius prolixus, lysed in distilled water, and bioassayed for diuretic hormone (dh) activity on isolated malpighian tubules. dh was found in a least 10 somata within the ganglion; electron micrographs of isolated cells show a large population of elementary neurosecretory granules. quantitative measures of hormone activity were made by bioassaying somata from unfed 5th instar larvae, and at the following times ... | 1979 | 421131 |
| ecdysone, juvenile hormone and oögenesis in rhodnius prolixus. | | 1979 | 387882 |
| purification and characterization of a sulfhydryl-dependent protease from rhodnius prolixus midgut. | | 1978 | 28087 |
| the action of juvenile hormone on follicle cells of rhodnius prolixus in vitro: the effect of colchicine and cytochalasin b. | | 1977 | 892420 |
| high-molecular-weight forms of diuretic hormone from rhodnius prolixus [proceedings]. | | 1977 | 913782 |
| some lipid classes in the fat-body of rhodnius prolixus. | | 1977 | 614757 |
| sequence of ultrastructural changes induced by activation in the posterior neurosecretory cells in the brain of rhodnius prolixus with special reference to the role of lysosomes. | the posterior neurosecretory cell (pnc) group in the brain of rhodnius prolixus is composed of five ultrastructurally identical cells. the pnc were examined in the unfed fifth instar and at seven stages (from 15 min to 14 days) after activation was initiated by feeding. each stage examined revealed successive changes in morphology which can be related to the synthesis, maturation, storage and transport of neurosecretory material. it is suggested, in particular, that the lysosomal system (dense b ... | 1977 | 337573 |
| control of protease secretion in the intestine of fifth instar larvae of rhodnius prolixus. | | 1977 | 323372 |
| the inheritance of radiation induced semi-sterility in rhodnius prolixus. | eggs from crosses of 40 adult male r. prolixus irradiated with 6k rad gamma-rays with normal females had a mean fertility of 23.9%, only 2 crosses being completely sterile. the 86 f1 progeny of both sexes, when outcrossed with normal mates, had a mean egg fertility of 12.6;, and 43 of these matings were completely sterile. twenty-eight "f2" bugs reared from f1 x normal crosses were mated with normal partners and had a mean fertility of 44.6%, 6 of them being fully fertile, a reversal towards nor ... | 1976 | 793795 |
| ecdysterone-induced mortality and inhibition of feeding in diapausing rhodnius prolixus stal. | | 1976 | 782905 |
| further studies on potencies of nucleotides as gorging stimuli during feeding in rhodnius prolixus. | | 1976 | 781143 |
| distribution of lipid in the lamellate endocuticle of rhodnius prolixus (hemiptera). | the lamellate appearance of the cuticle in the abdomen of the rhodnius larva conforms to the conception of bouligand in being an optical artifact which results from the spiral arrangement of successive layers of oriented fibrils. but superimposed on this structure is an actual lamination of bound lipid with the same spacing. the relation of the lipid layers to the optical lamination changes with the aspect from which the system is viewed. there must therefore be a cyclical secretion of lipid by ... | 1975 | 1107337 |
| differences in the concentration of free amino acids in the haemolymph of adult male and female rhodnius prolixus. | | 1975 | 1183193 |
| the role of adenosine 3':5'-cyclic monophosphate in relation to the diuretic hormone of rhodnius prolixus. | | 1975 | 171312 |
| two actions of juvenile hormone on the follicle cells of rhodnius prolixus stal. | | 1975 | 1098753 |
| insect peripheral nerves: accessibility of neurohaemal regions to lanthanum. | during incubation in vivo, exogenously applied ionic lanthanum comes to surround the numerous neurosecretory terminals which are found lying within or immediately beneath the acellular neural lamella ensheathing the nerves from fifth instar and adult specimens of rhodnius prolixus. the lanthanum does not penetrate beyond the cellular perineurium, which completely surrounds the non-neurosecretory axons in these nerves and constitutes a form of 'blood-brain barrier'. in some cases, however, lantha ... | 1975 | 1141392 |
| feeding in rhodnius prolixus: increasing sensitivity to atp during prolonged food deprivation. | | 1975 | 1095659 |
| [morphogenic discontinuities in epidermal cell populations of arthropods, rhodnius prolixus stål, periplaneta americana l, studied by scanning electron microscope]. | several populations of arthropodian epidermal cells show modifications of polar and structural pattern features. modifications may be gradual or the opposite, localised in distant or adjacent regions. morphogenetical discontinuities are defined where adjacent regions present a modification pattern without intermediate types. | 1975 | 807372 |
| [comparison of the effects of ecdysone and ecdysterone on moulting in the insect rhodnius prolixus (stål) (hemiptera ruduviidae)]. | the allatectomy in the 4th instar larvae of rhodnius prolixus stops moulting in 93 per cent of the cases. a different type of moulting results in these larvae after the injection of ecdysone or ecdysterone. the ecdysterone induced a rapid apolysis with a new adultoid cuticle tending towards larval but with the ecdysone, apolysis occurred at normal times and the cuticle secreted was strongly adultoid. | 1975 | 807349 |
| [feeding of rhodnius prolixus in the laboratory]. | | 1975 | 829020 |
| [toxicity of the preparation drayon for the bug rhodnius prolixus stal (order hemiptera, family triatomidae)]. | | 2009 | 803609 |
| proceedings: limited survival of trypanosoma (schizotrypanum) dionisii in rhodnius prolixus. | | 1975 | 766324 |
| ultrastructure of neurosecretory cells in the pars intercerebralis of rhodnius prolixus (hemiptera). | six neuron types are distinguished in the pars intercerebralis of the starved fifth instar of rhodnius prolixus. all neuron types contain electron dense secretory granules derived from golgi complexes which are of characteristic size and morphology in each type. the neuron types are not thought to represent stages in a secretory cycle. the variety of neuron types described is related to that revealed by staining sections of the same cells with paraldehyde fuchsin. active synthesis of neurosecret ... | 1975 | 47198 |
| partial characterization of a proposed antigonadotropin from the ovaries of the insect rhodnius prolixus stål. | | 1974 | 4476672 |
| the response of the follicle cells of rhodnius prolixus to juvenile hormone and antigonadotropin in vitro. | | 1974 | 4611604 |
| isolation and purification of the diuretic hormone from rhodnius prolixus. | | 1974 | 4606696 |
| changes in the concentration of free amino acids in the haemolymph of rhodnius prolixus during the fifth instar. | | 1974 | 4833119 |
| [natural and experimental variations in blood proteins in the female rhodnius prolixus (stal) reduviid hemipterous insect]. | | 1974 | 4592655 |
| [blockade of egg laying and egg feritily of rhodnius prolixus influenced by cholretetracycline]. | | 1974 | 4618619 |
| the ultrastructure of neurons with both a motor and a neurosecretory function in the insect, rhodnius prolixus. | | 1973 | 4273271 |
| the germfree culture of three species of triatominae: triatoma protracta (uhler), triatoma rubida (uhler) and rhodnius prolixus stål. | | 1973 | 4586544 |
| the effect of the persistence of juvenile hormone mimics on their activity on rhodnius prolixus. | | 1973 | 4581430 |
| the timing of meiosis and dna synthesis during spermatogenesis in the triatomine rhodnius prolixus stal. | | 1973 | 4593650 |
| a cytological study of the ovary of rhodnius prolixus. cytoarchitecture and development of the trophic chamber. | | 1972 | 4560671 |
| a cytological study of the ovary of rhodnius prolixus. ii. oocyte differentiation. | | 1972 | 4558545 |
| a cytological study of the ovary of rhodnius prolixus. i. the ontogeny of the follicular epithelium. | | 1972 | 4552847 |
| a comparison between the dermal glands in two insects rhodnius prolixus (hemiptera) and calpodes ethlius (lepidoptera). | | 1972 | 4111713 |
| [sensitivity of rhodnius prolixus stal bugs to dieldrin, phenthion and malathion]. | | 2017 | 4555672 |
| tapinoma melanocephalum as an inhibitor of rhodnius prolixus populations. | | 1971 | 5005142 |
| the control of protease synthesis in the intestine of adults of rhodnius prolixus. | | 1971 | 4937554 |
| dynamics of the neurosecretory system in the brain of an insect, rhodnius prolixus, during growth and molting. | | 1971 | 4104369 |
| feeding in rhodnius prolixus: mouthpart activity and salivation, and their correlation with chanees of electrical resistance. | | 1971 | 4928384 |
| some effects of juvenile hormone mimics on aedes aegypta and rhodnius prolixus. | | 1971 | 4398587 |
| [preliminary research on sterilization of rhodnius prolixus by tarsal contact on surfaces treated with metepa (oxide of tris-(2-methyl-aziridinyl) phosphate)]. | | 1970 | 5002288 |
| effects of sub-lethal high temperature on an insect, rhodnius prolixus (stål.). v. a possible mechanism of the inhibition of reproduction. | | 1970 | 5483398 |
| effects of sub-lethal high temperature on an insect, rhodnius prolixus (stål.). iv. egg formation, oviposition and sterility. | | 1970 | 5483397 |
| injury metabolism in an insect, rhodnius prolixus. | | 1970 | 5433723 |
| the effects of vinblastine sulfate on the microtubular organization of the ovary of rhodnius prolixus. | | 1970 | 5466483 |
| [study in vivo of action of cerebral tissue homogenate on the rectum of rhodnius prolixus (hemiptera) stael]. | | 1970 | 4988314 |
| [experimental study of neuroendocrine control of diuresis in rhodnius prolixus (hemiptera stael)]. | | 1970 | 4988156 |
| the effects of nutrient and non-nutrient diets on the fat body cell nuclei and nucleoli of starved nymphs of rhodnius prolixus (hemiptera). | | 1970 | 5448821 |
| haemocytes in the repair of wounds in an insect (rhodnius prolixus). | | 1970 | 5442853 |
| effects of sub-lethal high temperature on the composition of the larval fat body in rhodnius prolixus. | | 1970 | 5438074 |