Microdensitometer
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Niveis energeticos e transições atomicas no Kr V1, ArV e Xe VII
In this thesis we studied the atomic emission spectra of five times ionized kripton (KrVI), four time ionized argon (ArV) and six time ionized xenon (XeVII). We used two theta-pinchs (Technological Institute of Lund -Sweden and Unicamp-Brazil) and a tube of capilar discharge (CIOp-Argentina) as a ligth sources. In the theta-pinch at Unicamp, several improvem
Publicado em: 1994
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2. Devolopment of hardware and software to operate a microdensitometer / Desenvolvimento de hardware e software para viabilizar a operação de um microdensitômetro
O presente trabalho foi desenvolvido para viabilizar a operação do microdensitômetro Optronics P-1000 através de um microcomputador tipo IBM-PC. Assim, desenvolveu-se uma interface (hardware), bem como todo o software necessário para operar o equipamento e fazer a aquisição dos dados digitalizados. Este software, permite, também, a visualização int
Publicado em: 1992
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3. Experimental determination of radiation dose distribution in an heterogeneous medium, irradiated with clinical beams of x and gamma rays / Determinação experimental da distribuição de dose de radiação em meio heterôgenio, irradiado por raios-x e gama radioterápicos
An experimental study of the perturbation caused by a cylindrical inhomogeneity of aluminium on dose distribution in a water phantom, irradiated by high energy photons used in radiation therapy, was performed, employing radiographic film as dosimeter. With these materials we intended to simulate the interface between bone and muscular tissue. The film was pl
Publicado em: 1989
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4. Towards an automated procedure for the quantitative cytological screening of cervical neoplasms.
Integrating microdensitometry has been used to quantify the glycoprotein, epithelial membrane antigen (EMA), which is frequently expressed on the cytoplasmic membrane of neoplastic cells of the cervix uteri. The technique was able to identify and quantify the antigen over a wide concentration range and could also be semi-automated using a microcomputer inter
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5. Computer assisted microdensitometric analysis of footprinting autoradiographic DATA.
A system comprised of a linear scanning microdensitometer interfaced to a personal computer has been developed to facilitate analysis of ligand-DNA footprinting autoradiograms. The system, which can be used to record density and sequence information from autoradiographic films, enables the user to relate the area under an autoradiographic band to the concent
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6. Cytoarchitectonic mapping by microdensitometry.
Functional differences among various portions of the cerebral cortex are often correlated with differing cortical layering patterns. Convenient, accurate techniques for scoring layering should therefore prove useful in electrophysiological as well as anatomical investigations. We report the application of a computer-controlled scanning microdensitometer as a
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7. The 65-kDa carrot microtubule-associated protein forms regularly arranged filamentous cross-bridges between microtubules
In plants, cortical microtubules (MTs) occur in characteristically parallel groups maintained up to one microtubule diameter apart by fine filamentous cross-bridges. However, none of the plant microtubule-associated proteins (MAPs) so far purified accounts for the observed separation between MTs in cells. We previously isolated from carrot cytoskeletons a MA
The National Academy of Sciences.
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8. Effects of intensified insulin treatment on retinal vessels in diabetic patients.
Forty-five diabetic patients were randomly assigned to treatment with continuous subcutaneous insulin infusion (CSII), multiple injections (MI), and conventional insulin treatment (CIT). They were prospectively followed up for one year. A computerised scanning microdensitometer was applied on fundus photographs of retinal vessels, and we studied changes in c
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9. Formation and Ultrastructure of Extra Membranes in Escherichia coli
A temperature-sensitive strain of Escherichia coli (strain 0111a1) was shown to accumulate membranous structures at 40 C. These “extra membranes” appeared as vesicles or whorls (or both), depending on the time of growth at 40 C. After 2 hr of growth at 40 C, only vesicles were observed in E. coli 0111a1 cells; both vesicles and whorls were apparent after