[Niobium powder--a new x-ray contrast medium for tracheobronchography]. / Niobpulver als neues Röntgenkontrastmittel für die Tracheobronchographie.

In inhalation tracheobronchography with niobium powder in rabbits and a volunteer (physician), excellent contour bronchograms with detailed imaging of the structure of the mucosa were obtained. With methodically proper application the niobium particles of 20-40 microns do not penetrate into the alveoli and are quickly (within 1-5 days) eliminated from the bronchi. Investigations with mice have shown, that niobium powder is insoluble, does not irritate tissues and is not resorbed. It is also nontoxic.

[Correction of the T immunological system deficit in experimental and clinical tuberculosis]. / Corectarea deficitului sistemului imunitar T în tuberculoza experimentala si clinica.

Thymus grafts, in semi-permeable chambers, from 7-10 day old white rats to guinea-pigs infected with M. tuberculosis, or to white rats that had underwent thymectomy and had been infected, is accompanied by a considerable decrease in the severity of the tuberculous process. A similar effect is obtained by the subcutaneous injection of a thymus preparation called Timalin. The addition to etiotropic therapy of the immunostimulant Levamisole in amounts of 2,5 mg/kg of body weight in white rats, and of 25 mg/kg of body weight in guinea-pigs, three times during a decade significantly enhanced the effect of the conventional therapy. Levamisole, when included in the complex therapy of tuberculosis patients (three times during a decade), accelerated the detoxification process, and the recovery of recent destructive lesions in the lung. In animals and in patients Levamisole increases the low activity of the T-lymphocytes immune system, as is indicated by data obtained with the leucocyte migration inhibition test, and with the rosette-formation test.