The first retinal ganglion cell axons arriving at the embryonic mouse ventral diencephalon encounter an inverted V-shaped neuronal array defining the midline and posterior boundaries of the future optic chiasm. These neurons express L1, an immunoglobulin superfamily molecule known to promote retinal axon outgrowth, and CD44, a cell surface molecule that we find inhibits embryonic retinal axon g...

Abstract The working mechanism of suggested tunable bandstop filtered with asymmetrical multiple‐mode resonator equipped tree‐shape branches is described in this letter. Because the established degree freedom, filters’ (BSFs) centre frequencies may be modified based on design approach. Meanwhile, BSFs have small dimensions and abrupt roll‐off skirts for transition bands. A technology demonstrat...

results: the most important diseases to consider in the differential diagnosis of fphl include chronic telogen effluvium (cte), permanent alopecia after chemotherapy (pac), alopecia areata incognito (aai) and frontal fibrosing alopecia (ffa). this review describes criteria for distinguishing these conditions from fphl. conclusions: the only approved treatment for fphl, which is 2% topical minox...

Penetration and development of juveniles of tobacco cyst nematode (Globodera tabacum solanacearum) on a resistant (NC567) and a susceptible (K326) cultivar of flue-cured tobacco (Nicotiana tabacum L.) were determined in root zone chamber experiments. More vermiform juveniles developed into a swollen shape at 22, 27, and 31 degrees C than at 17 degrees C. Development of flask-shaped nematodes ap...

For a class of two-point boundary value problems we prove exact-ness of an S-shaped bifurcation curve. Our result applies to a problem from combustion theory, which involves nonlinearities like e au=(u+a) for a > 0. 1. Introduction We consider positive solutions of u 00 + f(u) = 0 on (?1; 1); u(?1) = u(1) = 0: (1.1) Here is a positive parameter, and we wish to describe all solutions of (1.1) fo...

The association of various personal, occupational, and environmental factors with climatic droplet keratopathy and pterygium was examined in a group of Australian Aborigines. Climatic droplet keratopathy was seen especially in aboriginal males who had worked as stockmen for more than 20 years. Although no definite association with a single causal factor could be made, there is circumstantial ev...

In this paper, a new architecture for metacomputing is proposed , designed to integrate heterogeneous resources of the Internet. The goals of this metacomputer are the orchestration of very large amounts of workstations and the integration of supercomputers into a pool of resources for distributed parallel computing. Based on a tree shaped logical interconnection topology, the system provides n...

plane and mulberry trees play a crucial role in purifying the polluted air in tehran as a majorcity. in this research, 13 main districts of tehran city were chosen as study area. 20 completely healthy planeand mulberry species were selected in similar ecological conditions and age range. the uptake of cd and pbwas determined using spectrophotometry, whereas the chlorophyll content was measured ...

We propose a novel algorithm for extracting dependencies from the derivations of a large fragment of CCG. Unlike earlier proposals, our dependency structures are always tree-shaped. We then use these dependency trees to compare the strong generative capacities of CCG and TAG and obtain surprising results: Both formalisms generate the same languages of derivation trees – but the mechanisms they ...

The fixation of CO₂ into living matter sustains all life on Earth, and embeds the biosphere within geochemistry. The six known chemical pathways used by extant organisms for this function are recognized to have overlaps, but their evolution is incompletely understood. Here we reconstruct the complete early evolutionary history of biological carbon-fixation, relating all modern pathways to a sin...