Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 94 for “"venom"”.
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Behavioral and Physiological Ecology of Scorpion Venom Expenditure: Stinging, Spraying, and Venom Regeneration
… I reviewed the functional aspects of venom from a behavioral perspective to develop a comprehensive understanding of the behavioral ecology of venom. To explore the behavioral and physiological ecology of venom expenditure by scorpions, I conducted four studies of the medically …
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Ontogeny of Venom Use and Venom Composition in the Western Widow Spider Latrodectus Hesperus
<p>I investigated the behavioral ecology of venom and venom use by the western widow spider (Latrodectus hesperus), emphasizing the role of ontogeny. In an introductory paper, I reviewed existing definitions of venom and poison, and refined these by adding a third category of toxic biological …
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Notes of Venom and Vengeance
<p>In this new adult epic fantasy, the land is either poisoned or poisonous, the Gods don’t listen, and the Silvan High Fae have vanished into the mists of time. In the Silgan Empire in the city of Fall’s End, humans run the Kingdom while Low Fae like Madrigal struggle to make ends meet in the …
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Antigenic properties of snake venom cardiotoxins
In this dissertation an innitial investigation was made to lo~ate antigenic determinants of cardiotoxin vll 1 from N.nivea with a future view of applying the knowledge obtained in the design of synthetic vaccines. The conformation and surface properties of this toxin differs from that of proteins …
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Vascular Effects of PHYSALIA PHYSALIS Venom
… of Physalia physalis (Portuguese Man-of-War) venom on vascular smooth muscle and elucidate its mode of action. We utilized the in vivo approach by functionally isolating the skeletal muscle vasculature of the dog's hind leg, and the in vitro approach by studying rabbit arterial ring …
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Hv1 novel peptide inhibitor extracted from tarantula venom
… interaction between GsAF-I, a peptide from the venom of the tarantula Grammostola rosea, and human voltage-gated proton (Hv1) channels, critical in pH regulation and cellular signaling. Utilizing patch clamp techniques on genetically modified Chinese Hamster Ovary cells expressing human Hv1, the …
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Crotalus Snake Venom Preconditioning to Prevent Surgical Brain Injury
… that preconditioning with Crotalus rattlesnake venom, known for its hemorrhagic and inflammatory effects, mitigates some harmful effects of SBI. We have identified two proteins of interest in Crotalus venom: snake venom metalloproteinase (SVMP), an enzyme with hemorrhagic effects, and …
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Toxin-like proteins in the venom of Drosophila parasitoids
… differences are largely unknown. Some of their venom proteins have been shown to be important in suppressing host defense. Here, we report that Ganaspis brasiliensis, a parasitoid of D. suzukii survives well on Drosophila yakuba, a host species with a strong cellular immunity, and infected flies …
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Purification and properties of Bungarus fasciatus venom NAD glycohydrolase
… glycohydrolase (NADase) from Bungarus fasciatus venom was purified over 1000-fold to electrophoretic homogeneity through a 3-step procedure which included affinity chromatography on Cibacron Blue agarose. The enzyme exhibited a broad pH profile with the optimum range between 7-8. Studies on the …
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Venom Yield, Regeneration, and Composition in the Centipede Scolopendra Polymorpha
… regeneration, and composition of centipede venom. In the first of three empirical studies, I investigated how size influenced venom volume yield and protein concentration in <em>Scolopendra polymorpha </em>and <em>S. subspinipes</em>. I also examined additional potential influences on yield …
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A Homoeopathic drug proving of the venom of Bitis arietans arietans
Dissertation submitted in partial compliance with the requirements for the Master's Degree in Technology: Homoeopathy, Technikon Natal, Durban, South Africa, 1999.
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Venom Expenditure by Viperid and Elapid Snakes: Mechanisms, Adaptation, and Application
… I examined some of the factors that influence venom expenditure by viperid and elapid snakes in both predatory and defensive contexts. I also considered the consequences of venom delivery into human snakebite victims. In the first of four experiments, In the first experiment, I explored whether …
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The Effect of Diet on Venom Gene Expression in Tetragnatha versicolor
… insect species also differentially express venom genes. First, I determined whether two populations of T. versicolor were eating different prey species by measuring the [delta]15N values of T. versicolor from each site. The results of this analysis were that the [delta]15N values for the two …
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The identification and characterisation of antimicrobial peptides from snake and scorpion venom.
… action, and selectivity to prokaryotic membranes.Venoms are an under exploited source of AMPs, in this thesis AMPs have been identified, biologically characterised and their mechanism investigated. From snake venom two novel AMPs (6-7KDa) along with four potential phospholipase A2 (PLA2) proteins …
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The Relationship of Structure and Immunogenicity of the Bee-Venom Peptide Melittin
<p>Melittin, a bee-venom peptide of 26 amino acids, has well-known amphiphilic properties. These properties result in a number of interesting biophysical behaviors and defined quaternary structures; knowledge of these activities has been exploited to understand the relationship of structure and …
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Study of prothrombin activation by taipan snake venom using light beating spectroscopy
… and its activation kinetics via Taipan Snake Venom, micellar phospholipid and Ca++. The correlation times fCc) on the samples of human prothrombin, which were prepared by membrance filtering techniques, were measured as a function of scattering angle to determine the particle size uniformity. …
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Molecular Mechanisms of Physalia Physalis Venom Modulation of Cardiac and Vascular Functions
… man-of-war <em>(Physalia physalis)</em>venom has profound effects on the cardiovascular system of man and animals. The venom produces vascular relaxation in norepinephrine precontracted, intact rabbit femoral arterial rings by stimulating vasodilatory prostaglandin synthesis in the …
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Mast Cell Histamine Release Induced by Portuguese Man-of-War (Physalia) Venom
… the general mechanism whereby nematocyst venom causes the direct release of histamine from isolated mast cells. It attempts to compare this effect, histamine release, with other studies using whole tissue extracts and/or whole animals. Crude peritoneal mast cells were obtained from male …
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Effects of Portuguese Man-of-War (PHYSALIA PHYSALIS) Venom on Isolated Rabbit Atria
<p>The cardiac effects of Portuguese man-of-war venom were studied using isolated atria from rabbits. Venom added (7.1 µg protein/ml) to the bath solution stimulates heart rate 120% (P < 0.01) and increases contraction amplitude 308% (P < 0.001). Both effects are dependent on bath concentrations of …
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