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The early retinal genes dachshund (dac), eyes absent (eya) and sine oculis (so) are key regulators of adult eye development in Drosophila. Expression data implicate homologs of all three transcription factor genes in vertebrate eye development. However, functional confirmation has thus far only been reported for so homologs. We therefore investigated(More)
The evolution of larval head morphology in holometabolous insects is characterized by reduction of antennal appendages and the visual system components. Little insight has been gained into molecular developmental changes underlying this morphological diversification. Here we compare the expression of the segment polarity gene wingless (wg) in the pregnathal(More)
The Pax6 genes eyeless (ey) and twin of eyeless (toy) are upstream regulators in the retinal determination gene network (RDGN), which instructs the formation of the adult eye primordium in Drosophila. Most animals possess a singleton Pax6 ortholog, but the dependence of eye development on Pax6 is widely conserved. A rare exception is given by the larval(More)
Tribolium castaneum is a member of the most species-rich eukaryotic order, a powerful model organism for the study of generalized insect development, and an important pest of stored agricultural products. We describe its genome sequence here. This omnivorous beetle has evolved the ability to interact with a diverse chemical environment, as shown by large(More)
Swine influenza virus (SIV) has a strong tropism for pig respiratory mucosa, which consists of a mucus layer, epithelium, basement membrane and lamina propria. Sialic acids present on the epithelial surface have long been considered to be determinants of influenza virus tropism. However, mucus which is also rich in sialic acids may serve as the first(More)
A portable electrochemical sensor has been developed for determination of tricresyl phosphate (TCP) in gas phase. An alkaline catalyst column was used in an automatic TCP sampling system where gasified TCP was hydrolysed to cresol, making it electrochemically detectable. Hydrolysates were then detected in the flow injection analysis (FIA). Amperometric(More)
Colorectal cancer is the third most common type of cancer worldwide. However, this disease can be prevented by detection and removal of precursor adenomatous polyps during optical colonoscopy (OC). During OC, the endoscopist looks for colon polyps. While hyperplastic polyps are benign lesions, adenomatous polyps are likely to become cancerous. Hence, it is(More)
Coatings prepared from nanosized powders were obtained by spraying ethanol-based colloidal solutions into a plasma plume. The powders investigated included 40 nm γ-Al 2 O 3 , 75 nm 8 wt% Y 2 O 3-ZrO 2 , and 750 nm 25 wt% CeO 2-ZrO 2. Spray distances from approximately 50 to 63 mm were required to achieve significant coating deposition. As observed in the(More)
We introduce Erosion Band Signatures (EBS), which are a codification of the spatial coherence of features extracted from a region. This coherence is often lost in traditional global and local feature extraction methods, thereby diminishing a feature’s discriminative strength. The erosion band signature is generated through iterative erosions of the region(More)