High resolution x-ray lithographic studies of cells from chick embryo hearts dried by the CO2 cri... more High resolution x-ray lithographic studies of cells from chick embryo hearts dried by the CO2 critical point method have been made with soft x-ray radiation of different wavelengths. A marked difference in the relief replica in polymethyl methacrylate (PMMA) resulting from the differential absorption by the dried cells of carbon K~ radiation at 4.48 nm and broad band synchrotron radiation (SR) with h > 1.5 nm demonstrates the potential usefulness of the technique in making high resolution (~-10 nm) chemical identification of the constitutents which make up the various parts of the cell.
... which allows the BHA to be changed without tripping the casing, and Drilling with Casing®, wh... more ... which allows the BHA to be changed without tripping the casing, and Drilling with Casing®, which uses a fixed cutter drill shoe. ... Casing Drilling – Experience in Brazil JCR Plácido, SPE, F. Medeiros, H. Lucena, JCM Medeiros, VASR Costa, PRC Silva, and CC Gravina, Petrobras ...
High resolution x-ray lithographic studies of cells from chick embryo hearts dried by the CO2 cri... more High resolution x-ray lithographic studies of cells from chick embryo hearts dried by the CO2 critical point method have been made with soft x-ray radiation of different wavelengths. A marked difference in the relief replica in polymethyl methacrylate (PMMA) resulting from the differential absorption by the dried cells of carbon K~ radiation at 4.48 nm and broad band synchrotron radiation (SR) with h > 1.5 nm demonstrates the potential usefulness of the technique in making high resolution (~-10 nm) chemical identification of the constitutents which make up the various parts of the cell.
... which allows the BHA to be changed without tripping the casing, and Drilling with Casing®, wh... more ... which allows the BHA to be changed without tripping the casing, and Drilling with Casing®, which uses a fixed cutter drill shoe. ... Casing Drilling – Experience in Brazil JCR Plácido, SPE, F. Medeiros, H. Lucena, JCM Medeiros, VASR Costa, PRC Silva, and CC Gravina, Petrobras ...
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