In this paper, a result of Albert, Atkinson, Handley, Holton, and Stromquist (Proposition 2.4 of [1]) which characterizes the optimal packing behavior of the pattern 1243 is generalized in two directions. The packing densities of layered patterns of type (1, α) and (1, 1, β) are computed. AMS Subject Classifications: 05A15, 05A16

The retinal pigment epithelium-specific 65 kDa protein is an isomerase encoded by the RPE65 gene (MIM 180069) that is responsible for an essential enzymatic step required for the function of the visual cycle. Mutations in the RPE65 gene cause not only subtype II of Leber congenital amaurosis (LCA) but also early-onset severe retinal dystrophy (EOSRD). This study aims to investigate a Chinese ca...

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2557 tives on racial and ethnic differences in health in late life. Washington, D.C.: National Academies Press, 2004:643-74. 3. HIV/AIDS surveillance report. Vol. 8. No. 2. Atlanta: Centers for Disease Control and Prevention, 1996:28. 4. HIV/AIDS surveillance report. Vol. 15. Atlanta: Centers for Disease Control and Prevention, 2003:12. 5. Jaffe H. Whatever happened to the U.S. AIDS epidemic? S...

References 1. European Carotid Surgery Trialists' Group: MRC European Carotid Surgery Trial: Interim results for symptomatic patients with severe (70-99%) or with mild (0-29%) carotid stenosis. Lancet 1991^37:1235-1243 2. North American Symptomatic Carotid Endarterectomy Trial Collaborators: Beneficial effect of carotid endarterectomy in symptomatic patients with high-grade carotid stenosis. N ...

We investigate the structure of the two permutation classes defined by the sets of forbidden patterns {1234, 2341} and {1243, 2314}. By considering how the Hasse graphs of permutations in these classes can be built from a sequence of rooted source graphs, we determine their algebraic generating functions. Our approach is similar to that of “adding a slice”, used previously to enumerate various ...

lial nitric oxide (NO) inhibits platelet aggregation, thrombogenesis, leukocyte adhesion, and proliferation of vascular smooth muscle cells. Endothelial dysfunction that is closely related with impaired NO actions may represent a early stage of vasculopathy leading to atherosclerotic cardiovascular disorders. Accordingly, chronic inhibition of NO synthesis by administration of high dosage of N-...