[The carcinogenic activity of N-nitrosodipropylamine administered perorally to C57Bl mice]. / Kantserogennaia aktivnost' N-nitrozodipropilamina pri peroral'nom vvedenii mysham linii C57Bl.

187 female and male C57B1 mice received N-nitrosodipropylamine (NDPA) twice a week for 50 weeks by intragastric intubation. The total dose of NDPA administered to groups I and II was 3 mg or 1 mg per mouse. The main kinds of tumours in these groups were tumours of esophagus, forestomach, lungs, and lymphomas. The incidence of pulmonary adenomas and forestomach papillomas was more frequent in the group which received a higher dose of carcinogen.

[Effects of light-activated hematoporphyrin derivative on nucleotides and experimental tumors]. / Vozdeistvie aktivirovannogo svetom proizvodnogo gematoporfirina na nukleotidy i éksperimental'nye opukholi.

The data on the photodamage of biomolecules and experimental tumours by a hematoporphyrin derivative activated with laser radiation are presented. Inhibition of the tumour growth and prolongation of the life-span of treated tumour-bearing animals are observed.

[Anisotropy of SHF-energy absorption in cancerous and normal animal tissues]. / Ob anizotropii pogloshcheniia SVCh-énergii v nekotorykh opukholevykh i normal'nykh tkaniakh zhivotnykh.

The angular distribution of the microwave absorption in normal and tumor (PC-1, Sa-45) tissues in the plane perpendicular or parallel to the body maximum size vector ----1 was investigated. The mechanism of microwave section induction by means of a "strong-radiation" slot was used to measure the angular distribution of microwave power. All types of tumor with the anisotropy factor K = 2 divided by 2.2 were shown to be characterised by a strong long-term anisotropy of absorption at ----E parallel 1 (where ----E--vector of electric field). In normal tissue anisotropy levels were lower (liver--K = 1.2; subcutaneous fat--K = 1.4).