Steven W. Keller

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Monolayer and multilayer thin films consisting of anionic R-zirconium phosphate (R-ZrP) sheets and polycations (poly(allylamine hydrochloride) (PAH), cytochrome c) were characterized by transmission electron microscopy (TEM), ellipsometry, UV-visible absorbance spectroscopy, reflectance FT-IR, XPS, and X-ray diffraction. Titration and powder X-ray(More)
A morphometric study of argyrophilic Amine Precursor Uptake and Decarboxylase (APUD) cells in airways and intestine of guinea pigs after hypothalamic lesions is reported. APUD cell densities are expressed as APUD cell number/mm of airway or gut perimeter length and as APUD cell/100 epithelial cells. The latter ratio is useful to distinguish generalized(More)
Amine Precursor Uptake and Decarboxylase (APUD) cells have been studied quantitatively to determine their normal distribution in the airways, ileum and cecum of adult guinea pigs utilizing tissues fixed in either Bouin’s or Ito and Karnovsky’s fixative. Cells were detected by four histochemical stains: Grimelius, en-block silver, lead-hematoxylin-en block(More)
Non-small-cell lung cancer (NSCLC) has one of the highest death rates among the various forms of cancer. In attempts to improve on this unsatisfactory outcome, different radiation schedules and chemotherapy agents have been examined in phase II or III studies. These have led to modest improvements in local control and survival, but combined therapies are(More)
Solid-state compounds have historically been prepared through high-temperature solid-solid reactions. New mechanistic understanding of these reactions suggests possible routes to metastable compositions and structures as well as to thermodynamically stable, low-temperature phases that decompose at higher temperatures. Intermediate-temperature synthetic(More)
Compensatory growth is mediated by multiple cell types that interact during organ repair. To elucidate the relationship between stem/progenitor cells that proliferate or differentiate and somatic cells of the lung, we used a novel organotypic ex vivo pneumoexplant system. Applying this technique, we identified a sustained culture of repopulating adult(More)
The synthesis and crystal structure of Cu(6)(4,7-phenanthroline)(8)(MeCN)(4)(6+) a novel Cu(i)-molecular hexamer is described in which the metal cations and phenanthroline molecules self-assemble into a dimer of shallow triangular-shaped bowls, within which are located large spherical polyoxometalate anions PM(12)O(40)(3-)(M = Mo or W).