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M Matzeu

Publications and source records attributed to M Matzeu.

At least 37 records · Page 2Linked to original sources
PubMed1969

Cesium chloride density gradient study of some modifications induced by ultraviolet radiation on the denatured DNA molecule of phage T2.

The behaviour of the modifications due to ultraviolet (UV) radiation on denatured phagic DNA has been investigated by looking at the changes of density in CsCl gradient, after irradiation with increasing doses of monochromatic light. The spectral range studied is 2300-2900 A, with a wavelength resolution Deltalambda = +/-20 A. The observed effect is a gradual shift toward higher densities as the UV absorbed dose increases. The experimental results show an exponential law and the analysis of the action spectra indicates that thymine is the main factor responsible for the observed effect. An evaluation of the quantum yield for the thymine-dimers formation gives a constant value of (18 +/- 3) x 10(-3) quanta(-1).

Bacteriophages↗
PubMedDate not supplied

[Epidemiology and diagnosis of tuberculosis].

Major epidemiological aspects of tuberculosis, a worldwide diffuse disease, are examined with regard to socio-economical consequences in different countries. These data are compared with the latest statistical informations collected in Italy. Although incidence and prevalence of tuberculosis in our country are constantly decreasing, the disease is still a problem both from the diagnostic and therapeutic point of view and from the social one, also in view of the diminished surveillance on the disease. Diagnostic aspects of tuberculosis are also discussed, and the present rarity of some clinical forms (miliary tbc, caseating pneumonia) is emphasized.

Antitubercular Agents↗