This proposal is about a project to study the biological activities of Artemia caused by ultrasound exposure. Ultrasound is employed clinically, for example, in medical diagnosis as a pulse-echo technique for obtaining information of tissue characteristics. It can also use the high-intensity-ultrasound to destroy the lump and pathogens of human tissues. In the other hand, the ultrasonic experiments of plant or insect tissues that contain gas in intercellular channels irradiate with megahertz frequencies of ultrasound, causing perturbation and destruction in nearby cells. Thus, the ultrasonic biological effect, in general, is destructive. However, ultrasound can be a noninvasive form of mechanical energy propagated in biologic organisms. This fact attracts our attention to identify the biologic mechanisms corresponding to the biological activation of Artemia induced by ultrasound exposure. To perform the above-mentioned research, the oscillation of the Artemia in response to the ultrasound radiation is simulated using Rayleigh-Plesset¡¦s bubble activation theory. The gas body activation theory is to calculate the resonant frequencies of the Artemia at different stages of its life. The calculated resonant frequency range of the Artemia cyst shape and the embryonic cuticle is about 0.222~0.226 MHz and 2.46~4.71 MHz. By using the above mentioned resonance frequency of the Artemia, the maximum relative growth rate was increasing 16%. It was found that the Artemia of activation and increasing the hatching rate appeared during irradiation.

Thesis (Ph. D.)--University of Missouri-Columbia, 2000. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.

This is the first study of the Upper Jurassic and Lower Cretaceous dinoflagellate cysts of the Kyuquot Group on Grassy Island, British Columbia. Thirty nine dinoflagellate cyst taxa were identified in 85 samples collected from the Upper Tithonian Kapoose and Berriasian to Middle Valanginian One Tree formations. Cyst recovery, concentrations and diversity are relatively high in the samples from of the Kapoose Formation, whereas samples from One Tree Formation had poor dinoflagellate cyst recovery. Four dinoflagellate cyst zones were identified. Three cyst zones (Cometodinium habibii-Endoscrinium campanula-Oligosphaeridium sp.-Pareodinia spp.- Gonyaulacysta jurassica zone; Cyst Type P zone; and Circulodinium spp.-Cyst Type P zone) correspond to the Buchia columbiana zone from of the Kapoose Formation and the fourth cyst zone (Cyst Type D-Cyst Type Q-Circulodinium spp.-Gonyaulacysta spp. zone) is identified from the One Tree Formation, where four Buchia zones are recognised. The change in the ratio of marine to terrestrial palynomorphs indicates that the basin went through progressive shallowing and/or the shore came closer to the site of deposition beginning in the Upper Tithonian and continuous through to the Valanginian. The zones resemble established Siberian dinoflagellate cyst zones of the same age. This correlation suggests that the two regions were a part of the Boreal Realm during the interval. / Graduate

No description available.

Thesis (doctoral)--Uppsala University, 1979. / Includes bibliographical references (p. 20-22).

Thesis (Ph. D.)--University of Missouri-Columbia, 2000. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.

We report a patient with Von Hippel-Lindau disease who presented with an intradural extramedullary hemangioblastoma as a primary manifestation. / Revisión por pares

The initial interaction of vesicle and the target membrane prior to their fusion is called vesicle tethering, a process mediated by an octameric protein complex called the exocyst. The exocyst connects vesicles and binds them to phosphatidylinositol 4, 5-biphosphate (PI (4,5) P2), located on the plasma membrane. The exocyst complex is located at the target site, helping to prepare the soluble N-ethylmaleimide-sensitive fusion protein attachment protein (SNAP) receptor (SNARE) for docking and subsequent release of vesicular contents after fusion. The importance of the exocyst in cellular processes is inevitable since it performs central roles in exocytosis thereby inducing SNARE-mediated membrane fusion. The study presented here is concentrated on the role of exocyst genes during the defense response in Glycine max (soybean) against the plant- parasitic nematode Heterodera glycines known as the soybean cyst nematode (SCN). Using developmental genomics analysis, G. max root cells that have been induced by H. glycines through their pathogenic activities to develop into nurse cells known as a syncytium have been isolated by laser capture microdissection (LCM). RNA isolated from these cells undergoing resistant reactions in two different G. max genotypes have been used in gene expression profiling experiments that have led to the identification of the genes employed in this analysis. The results demonstrate the involvement of exocyst components in the defense process that G. max has toward H. glycines. Related studies also show the involvement of RPM1-INTERACTING PROTEIN 4 (RIN4) functioning in this defense process.

No description available.

Master of Science / Department of Agronomy / William T. Schapaugh Jr / The soybean cyst nematode (Heterodera glycines) (SCN) is an important pathogen of soybean in the United States. Annual yield losses from SCN are estimated to be over $2 billion worldwide. However, SCN virulence or the ability of a nematode to grow on resistant soybean genotypes varies widely among SCN populations. Fortunately there are several genetic sources of resistance to decrease the virulence of the pathogen on soybean. The objectives of this research were to: 1) characterize the genetic diversity of soybean cyst nematode populations in Kansas, 2) determine the frequency of Kansas SCN populations virulent on PI88788, 3) determine which plant introductions used in the HG Type Test provide the best level resistance, and 4) compare the performance of commercial soybean cultivars to the plant introduction from which their SCN resistance was derived. Soil samples were collected from SCN-infested fields across the state. Each soil sample was taken to the greenhouse and planted to a susceptible soybean cultivar to increase SCN population. Following an SCN population increase, a HG Type Test was planted. H. glycines field populations were highly variable, not only in population densities, but also in their abilities to develop on soybean genotypes. Collected from a diverse range of environments, ten HG types were identified. About 50% of the H. glycines populations were virulent on PI 88788, and most of the populations were virulent on commercial SCN resistant lines which derived their resistance from PI 88788. The commercial lines tended to be more susceptible to SCN than the lines from which they derived their resistance, but few HG populations were virulent on PI 437654 or the commercial line that derived its resistance from PI 437654. These results suggest that sources other than PI 88788 should be used in the development of H. glycines resistant cultivars for Kansas. One possible source of resistance is PI 437654. Information about SCN diversity in Kansas will improve decisions regarding cultivar development and selection for SCN management.