It is generally accepted that the hatching of mouse blastocysts is accompanied by regional dissolution of the zona pellucida by a trypsin-like proteinase synthesized in trophectoderm cells (Perona and Wassarman, 1986; Hogan et al., 1994), and trophectoderm cells protrude from the dissolved hole of the zona pellucida (Orsini and McLaren, 1967; McLaren, 1970; Niimura and Fujii, 1997). Then a slit...

Title of Dissertation: MECHANISMS UNDERLYING OUTBREAKS OF SPIDER MITES FOLLOWING APPLICATIONS OF IMIDACLOPRID. Adrianna Szczepaniec, Ph.D., 2009 Directed By: Professor Michael J. Raupp, Department of Entomology Imidacloprid is a widely used neonicotinoid insecticide with high efficacy and long residual activity, and it is frequently applied to manage insect pests in urban landscapes. Recent rep...

The use of non-destructive methods to detect egg hatching properties could increase efficiency in commercial hatcheries by saving space, reducing costs, and ensuring hatching quality. For this purpose, a hyperspectral imaging system was built to detect embryo development and vitality using spectral and morphological information of hatching eggs. A total of 150 green shell eggs were used, and hy...

Although it is well documented that hatching asynchrony in birds can lead to competitive and developmental hierarchies, potentially greatly affecting growth and survival of nestlings, hatching asynchrony may also precipitate modulations in neuroendocrine development or function. Here we examine sibling variation in adrenocortical function in postnatally developing, asynchronously hatching Ameri...

New impetus for considering the potential of spiders to control insect prey comes from foodweb models indicating that generalist predators can limit prey populations through the establishment of stable population equilibria between predators and associated prey (De Angelis et al., 1975; Tanner, 1975; Post & Travis, 1979). Spiders are generalist feeders (Riechert & Ĺuczak, 1982) that meet the cr...

background:   due to importance and fatal affect of red-back spiders, latrodectus hasselti , a f a unistic survey for presence of this spider in bandar abbas has been conducted. this animal is considerably the most medically importance spiders all over the world. methods: live adult spider specimens were collected from bandar abbas town using hand catch conventional method and transferred to th...

Geared to complement UML and to the specification of large software systems by non-mathematicians, spider diagrams are a visual language that generalizes the popular and intuitive Venn diagrams and Euler circles. The language design emphasized scalability and expressiveness while retaining intuitiveness. In this extended abstract we describe spider diagrams from a mathematical standpoint and sh...

A peptidomimetic compound containing leucine, tyrosine and malonic acid self-assembles through various noncovalent interactions to form spider silk-like fibers at ambient temperature. From the high-density liquid, a liquid-solid phase transition is initiated at 20 °C and solidification occurs upon contact with air. The fiber has comprehensive mechanical strength and optical properties similar t...

The envenomation syndrome of Redback spider bites, lactrodectism, is distinctive. However diagnosis can be difficult due to an atypical presentation. We describe the case of a 1 year old boy with irritability, diaphoresis and reduced oral intake, in whom a diagnosis was made of redback spider bite. Successful resolution of symptoms was achieved following treatment with antivenom. The symptoms a...

Nanobubble dynamics in the spider-spinning procedure is elucidated, and a theoretical model is established to show why spider drag-line silk protein assemblies have extraordinary strength and toughness. Suggested by the spider-spinning, a bubble electrospinning is investigated for mass production of nanofibers within diameters 20 nm. El Naschie’s E-infinity theory is a universal theory for nano...