A major question in development is how different specialized cell types arise from a common progenitor. In the adult Drosophila compound eye, color discrimination is achieved by UV-, blue- and green-sensitive photoreceptors (PRs). These different PR subsets arise from neuronal precursors called R7 and R8 cells. Recent studies have demonstrated that R7-based UV-sensitive PRs require the repressi...

sunflower has many dry forage yields and is richer than corn in inorganic matter, protein and calcium. therefore, use of this forage in livestock diets can be valuable for elimination of food poverty. in order to determine the best harvest stage for sunflower silage, an experiment was conducted in 2007-2008 at agricultural faculty of shahid chamran university of ahvaz. a randomized complete blo...

redicting how materials behave under stress is difficult, especially when only a small specimen or thin film is available for testing. One technique involves using an “indentor” to poke a probe into the material while accurately measuring the penetration depth and the force exerted. But analytical methods for inferring mechanical properties from such measurements are generally not reliable; and...

Many developmental processes are regulated by intercellular signaling mechanisms that employ the activation of receptor tyrosine kinases. One model system that has been particular useful in determining the role of receptor tyrosine kinase-mediated signaling processes in cell fate determination is the developing Drosophila eye. The specification of the R7 photoreceptor cell in each ommatidium of...

We make several observations relating the Lie algebra g2⊂so(7), associative 3-planes, and so(4) subalgebras. Some are likely well-known but not easy to find in literature, while other results new. show that an element X∈g2 cannot have rank 2, if it has 4 then its kernel is subspace. prove a canonical form theorem for elements of g2. Given 3-plane P R7, we construct subalgebra Θ(P) so(7)=Λ2(R7) ...

Abstract Bananas were examined starting from ripening stage R2 (green) to R7 (overripe), identify suitable non-invasive, real time in-situ technologies separate the stages: (1) Chlorophyll degradation, measured by DA meter, decreased ca. 2.1 (R2) 0.2 IAD units (R7), i.e. tenfold decline. (2) Colour CIE-Lab a values dramatically increased as indication of chlorophyll breakdown and enable differe...

BACKGROUND During menopause, the decrease of estrogenic secretion induces the disruption of skin functioning, thus causing the decline in skin elasticity characteristic of skin aging. The purpose of this study was to evaluate in postmenopausal women the effect of daily consumption and/or application of argan oil on skin elasticity. MATERIALS AND METHODS Sixty postmenopausal women consumed but...