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Biomedical subjects

R Otto

Publications and source records attributed to R Otto.

At least 127 records · Page 7Linked to original sources
PubMed1976

[The place of xerography combined with routine conventional mammography (author's transl)].

Xeroradiography is a valuable supplement to conventional mammography, especially in cases with dense glandular structure. In our patient material this new procedure was necessary for clarification of findings on conventional mammography in 16% of cases and improved diagnostic yield. Indirect and direct signs of carcinoma were more easely recognized with xeroradiography, since more detail is visualized because of greater latitude and edge contrast enhancement. Moreover the area visualized is considerably greater. The soft tissue structures can be seen to the level of the thoracic wall. Viewing the films is less tiring than reviewing conventional mammography films. A relatively greater exposure latitude and short exposure times are further advantages of this method.

Adenoma↗
PubMed1975

Oxidation of methanol, formaldehyde and formate by catalase purified from methanol-grown Hansenula polymorpha.

Catalase has been partially purified from cell-free extracts of methanol-grown Hansenula polymorpha and its peroxidative properties were studied. It was shown that the enzyme is capable of oxidizing methanol, formaldehyde and formate in the presence of hydrogen peroxide. The physiological significance of these reactions in the transduction of energy from the oxidation of methanol in yeasts is discussed.

Ascomycota↗
PubMed1975

[Pulmonary echinococcus cysticus].

A 23-year-old Spanish male presenting with hemoptysis, fever and radiologic signs of lung tumor was found to have hydatid disease of the lung with rupture into the bronchial system. Diagnosis was possible only by demonstration of scoleces in the sputum. The cyst was totally enucleated by surgery. The epidemiology, diagnosis and treatment of this quite rare disease are briefly reviewed with special reference to immunology, radiology and cytology.

Adult↗
PubMed1975

Correction of transposition of the great vessels with previous Baffes procedure.

Twenty-four patients with transposition of the great vessels who underwent a Baffes procedure in infancy were totally corrected by a modified Mustard procedure. There were three postoperative deaths and one major complication. All survivors have been followed from 2 to 8 yr and have done well except for one patient who required a tricuspid valve replacement because of tricuspid insufficiency. It is our conclusion that this group of patients can be corrected with a relatively low mortality and a favorable outcome.

Adolescent↗
PubMed1975

[A comparison of xero-tomography of the lung hilum with conventional tomography (author's transl)].

Because of its particular photoelectric properties, xero-tomography is particularly suited for the investigation of abnormalities in the hilar regions. It is superior to conventional tomography because of the improved edge contrast, which emphasises details of relatively non-opaque structures, and because of its high exposure latitude. This justifies its use despite the higher radiation dose that is necessary. The demonstration of relatively dense and of more transradient tissues on the same picture by xero-tomography, and the ability to read it by ordinary light, makes it less tiring to interpret than the translucencies of conventional radiographs.

Adult↗
PubMed1975

[Normal antistreptolysin titres and demonstration of rheumatoid factors in rhesus monkeys (Macaca mulatta) (author's transl)].

Rhesus monkeys are often used as experimental animals. Many clinical and biochemical parameters are known but there are only few papers dealing with the normal values of antistreptolysin O (ASL). Informations about antistreptococcal antibodies are necessary in order to follow the course of immunization and infection experiments. When non-absorbed sera were used, the mean value of antistreptolysin O in clinically healthy rhesus monkeys (Macacus rhesus) amounted to 178 +/- 52 ASU. After absorption with dextran sulphate, the mean value was 90 +/- 20 ASU. Absorption with dextransulphate is a necessary prerequisite to exact determinations of antistreptolysin titres because it removes unspecific inhibitors of streptolysin O. In the sera of rhesus monkey more inhibitors were present than in human sera. On an average, in monkeys 55% of the material reacting with streptolysin O was an inhibitor, compared with about 40% in human sera. As a result of common infections with streptolysin O-producing streptococcal groups C and G antistreptolysin titres can frequently be seen to increase above the average normal value. Using non-absorbed and dextran sulphate absorbed sera, respectively 350 and 200 ASU must be regarded as the normal upper limits for serum antistreptolysin-titres.

Animals↗