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Showing 1 to 20 of 72 for “"hemolymph"”.
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Flight activity and hemolymph diacylglyceride concentrations in Heliothis zea (Boddie) (Lepidoptera:Noctuidae)
… to detect lipids in microgram (ug) quantities of hemolymph. The effect of age, diurnal rhythms, and flight activity on hemolymph 1,2-diacylglyceride concentrations in male and female Heliothis zea (Boddie) (Lepidoptera: Noctuidae) were quantitated. The HPTLC method involved a two-stage, one …
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Patterns of Hemolymph Pressure Related to Tracheal Tube Collapse in the Beetle Pterostichus commutabulis
… the intra-tracheal air and the surrounding hemolymph. To determine the relationship between hemolymph pressure and tracheal tube collapse in the ground beetle (Pterostichus commutabulis), we performed direct measurements of hemolymph pressure inside the beetle's prothorax while …
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Influence of flight activity and octopamine on hemolymph trehalose titers in Heliothis zea (Boddie) (Lepidoptera: Noctuidae)
Hemolymph trehalose concentrations of male and female Heliothis zea were quantitated by high performance thin-layer chromatography (HPTLC) at various ages and times of the day and related to flight activity. Effects of octopamine injection or stress on trehalose levels were also quantified. Flight …
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Application of insect freeze tolerant strategies to the freezing of bovine embryos
Hemolymph of Tipula trivittata larvae permits freeze tolerance of this insect due to its content of cryoprotectants and ice nucleating proteins. Spontaneous ice nucleation of the dialyzed hemolymph occurs between -5 C and -11 C up to dilutions of 1:1000. The objectives of this study were to …
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Histopathological, biological and molecular characteristics of the pathogenic Spiroplasma penaei isolated from the hemolymph of infected Pacific white shrimp, Penaeus vannamei
… mollicute, Spiroplasma penaei, isolated from the hemolymph of infected Pacific white shrimp, Penaeus vannamei, were investigated. The doubling times of a S. penaei were 6.13 h (2% NaCl) and 3.43 h (no salt) under aerobic conditions, and 6.63 h (2% NaCl) and 3.22 h (no salt) under anaerobic …
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Cold-acclimation of the wood cockroach <i>Cryptocercus punctulatus</i> (Scudder) (Dictyoptera: Cryptocercidae)
… In this species, as well as others, heat-labile hemolymph ice nucleating factors induce extracellular ice formation at a high subzero temperature (around -6°C), there is a seasonal accumulation of a cryoprotective substance (polyol) and internal ice is tolerated only during the winter. In …
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Structural and Physical Characterization of Insect Flow Systems
… characterize the physical properties of insect hemolymph, specifically the viscosity and density of hemolymph, using experimental measurements. Because insects are strongly affected by environmental temperature, this chapter also explores how hemolymph viscosity may be affected by temperature. …
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The mechanical linkage of abdominal movements and the respiratory system in beetles
… by simultaneously measuring abdominal movement, hemolymph pressure, CO2 emission, and deformation of tracheal tubes. This study revealed that pupae with low metabolic rates do indeed exhibit tracheal compression, which is coincident with abdominal pumping and pressure pulsation. However, more …
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A Comparative Electrophoretic Study of the TRIATOMA RUBIDA Complex (Hemiptera: Reduviidae: Triatominae)
… electrophoresis to differentiate proteins in the hemolymph.</p> <p>The following studies were conducted and results obtained: Laboratory-induced bleeding over a 4-week period markedly lowers the total protein of the bugs studied. Patterns obtained from chicken-fed and rabbit-fed bugs, although …
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Puparium Formation in the Fleshfly, Sarcophaga Bullata (P.). I. Effectsof Proteinaceous Factors Present in the Hemolymph and the Cns (Central Nervous System) of the Larva. Ii. Effects of X-Irradiation
Made available in DSpace on 2014-12-11T22:22:23Z (GMT). No. of bitstreams: 1 7412191.pdf: 4471042 bytes, checksum: d66a447bdb9b47e0788b43f8bde33d9e (MD5) Previous issue date: 1973
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Reducing post-bleeding mortality of horseshoe crabs (Limulus polyphemus) used in the biomedical industry
… into amebocyte maintenance in vitro. Hemolymph volume of L. polyphemus was estimated over a representative size range of adults. Hemolymph volume expressed as a percentage of wet body weight was 25 ± 2.2% (mean ± S.D.) for males and 25 ± 5.1% for females. Mortality associated with …
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Physiological Response of the Giant Acorn Barnacle, Balanus nubilus, to Air Exposure
… the effects of air emersion and anoxia on 1) hemolymph gas, pH and ion levels, 2) oxygen consumption rates (MO<sub>2</sub>; emersion only), and 3) respiratory behaviors (e.g., cirri beating). In the first experiment, we measured hemolymph pO<sub>2</sub>, pCO<sub>2</sub>, pH and ion …
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The physiological effects of elevated carbon dioxide, in the context of non-physical fish barriers, on unionid mussels
… elevated HCO3-, Ca2+, Na+ and decreased Cl- in hemolymph to regulate acid-base balance. Additionally, unionid mussels also showed evidence of stress in response to long-term and fluctuating exposures to elevated pCO2, as demonstrated by elevated glucose levels and decrease Mg2+ concentrations in …
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Mechanisms Underlying Variation in Insect Chill Tolerance: The Role of Ion and Water Transport
… early chill coma. A rapid influx of Na+ to the hemolymph suggests that Na+ first leaks from the tissues, and could drive migration of Na+ and water to the gut. Gryllus veletis (a more cold-tolerant species) may avoid or slow this Na+ leak by maintaining lower hemolymph Na+ content and lower …
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The regulation of motoneuron survival in the tobacco hornworm, Manduca sexta
… sexta moth. The cell loss is regulated both by hemolymph concentrations of a steroid hormone, 20-hydroxyecdysone, and in the case of the MN-12 motoneurons, by actions exerted by neighboring ganglia.
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Circadian Organization of the Neuroendocrine System of an Adult Insect, Rhodnius Prolixus (STÄL) (HEMIPTERA)
… present during this time and their levels in hemolymph and ovaries undergo synchronous daily variations that are likewise under clock control. Ovaries are the only adult tissue examined that both contained and released ecdysteroids. It is inferred that the ovaries generate the rhythm of …
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