Juvenile Hormone
Mostrando 13-24 de 131 artigos, teses e dissertações.
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13. Biologia molecular de genes envolvidos no metabolismo do hormônio juvenil em Apis mellifera / Molecular biology of genes involved in Apis mellifera Juvenile Hormone metabolism
O Hormônio Juvenil (HJ) é um sesquiterpenóide que participa de diversas funções do ciclo de vida de insetos. Em Apis mellifera o HJ está envolvido também com o processo de diferenciação de castas e polietismo etário. Neste trabalho, genes participantes da degradação e das vias de síntese do HJ nos corpora allata (CA) foram identificados a partir
Publicado em: 2008
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14. Termorregulação colonial e energética individual em abelhas sem ferrão Melipona quadrifasciata Lepeletier (Hymenoptera, Apidae, Meliponini) / Colonial thermoregulation and energetics in stingless bees Melipona quadrifasciata Lepeletier (Hymenoptera, Apidae, Meliponini).
In eusocial insects, such as stingless bees, the control of nest conditions and maintenance of the colonial microclimate are important to brood incubation, development of eggs, larvae and pupae, and survival of the colony. One of the main thermoregulatory mechanisms to control nest temperature is the microhabitat selection to build the nest, such as tree hol
Publicado em: 2008
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15. Identification of differentially expressed genes in queen and worker castes of Melipona quadrifasciata / Identificação de genes diferencialmente expressos nas castas da rainha e operaria de Melipona quadrifasciata
Caste polyphenism is a multifaceted phenomenon, most evident in the marked differences in reproductive capacity and longevity between queens and workers. In the present study, the stingless bee Melipona quadrifasciata anthidioides was chosen to investigate differences in gene expression between newly emerged adult queens and workers. This study has focused o
Publicado em: 2005
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16. Protein content and electrophoretic profile of fat body and ovary extracts from workers of Melipona quadrifasciata anthidioides (Hymenoptera, Meliponini)
Workers of Melipona quadrifasciata anthidioides (Lepeletier, 1836) develop their ovaries and lay eggs, therefore the production of vitellogenin is expected. In electrophoretic profiles only fat body extracts from nurse workers and ovary extracts from newly-emerged workers show protein with molecular mass similar to vitellogenin. However, an increase in the p
Iheringia. Série Zoologia. Publicado em: 30/12/2004
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17. Haemolymph electrophoretic pattern of Ascia monuste orseis larvae (Lepidoptera: pieridae) parasitized by Cotesia glomerata (Hymenoptera: braconidae)
Cotesia glomerata is a natural enemy of the vegetable plague Ascia monuste orseis and preferably parasites 2nd, 3rd and 4th instar larvae. Parasitism effects on the haemolymph protein profile of Ascia monuste orseis larvae from the 2nd to 7th days were analyzed both qualitatively and quantitatively by SDS-PAGE and Coomassie-Blue binding methods. Quantitative
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2003
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18. Insect juvenile hormone: from "status quo" to high society
Juvenile hormone (JH) exerts pleiotropic functions during insect life cycles. The regulation of JH biosynthesis by neuropeptides and biogenic amines, as well as the transport of JH by specific binding proteins is now well understood. In contrast, comprehending its mode of action on target organs is still hampered by the difficulties in isolating specific rec
Brazilian Journal of Medical and Biological Research. Publicado em: 2000-02
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19. Juvenile Hormone Induction of Esterases: A Mechanism for the Regulation of Juvenile Hormone Titer
Within a few hours after injection of juvenile hormone into Hyalophora gloveri pupae, several fast-migrating carboxylesterases (EC 3.1.1.1) that are sensitive to diisopropylfluorophosphate appear in the hemolymph. Treatment of the pupae with puromycin or actinomycin D prevents the appearance of these hemolymph enzymes, suggesting de novo synthesis of the car
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20. The effect of ovary implants on juvenile hormone production by corpora allata of male Diploptera punctata
In the cockroach Diploptera punctata, vitellogenic basal oocytes stimulate juvenile hormone production by the corpora allata. Experiments with males were designed to determine whether oocytes must grow vitellogenically in order to stimulate juvenile hormone production. Two ovarioles with vitellogenic basal oocytes were implanted into unoperated and sham-oper
University of Arizona Library.
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21. Normalization of growth hormone hyperresponse to exercise in juvenile diabetics after “normalization” of blood sugar
The serum-growth hormone response to exercise is greater and occurs earlier in juvenile diabetics than in nondiabetics. A simple exercise test has been devised which unequivocally reveals the growth hormone hypersecretion of juvenile diabetics. Using this procedure we have shown that after a period of exceedingly strict metabolic control of the diabetes, com
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22. Mating experience and juvenile hormone enhance sexual signaling and mating in male Caribbean fruit flies
Young mated male Caribbean fruit flies [Anastrepha suspensa (Loew)] have greater sexual prowess than their virgin counterparts. After mating for the first time, 6- to 7-day-old males released twice as much sex pheromone and acquired another mate in less than half the time required by virgin males of the same age. Mass spectroscopic analysis of extracts of he
The National Academy of Sciences.
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23. Insecticidal properties of genetically engineered baculoviruses expressing an insect juvenile hormone esterase gene.
Exploring the possibility of enhancing the properties of baculoviruses as biological control agents of insect pests, we tested the effect of expressing an insect gene (jhe) encoding juvenile hormone esterase. Juvenile hormone esterase inactivates juvenile hormone, which regulates the outcome of an insect molt. A cDNA encoding the juvenile hormone esterase of
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24. The Juvenile Hormone Binding Protein in the Hemolymph of Manduca sexta Johannson (Lepidoptera: Sphingidae)
C18:juvenile hormone is quite soluble in water, yielding a monomeric solution greater than 10-5 M. In vivo injection or addition of aqueous juvenile hormone to the hemolymph in vitro shows the complexation of juvenile hormone to a protein, as demonstrated by gel permeation chromatography and disc-gel electrophoresis. The protein has an apparent molecular wei