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Biomedical subjects

M F Guimarães

Publications and source records attributed to M F Guimarães.

4 recordsLinked to original sources
PubMed1996

Culture of the astaxanthinogenic yeast Phaffia rhodozyma in low-cost media.

Growth of the yeast Phaffia rhodozyma was carried out in a simplified medium based on less expensive nutrient sources, such as diluted sugar cane juice, urea, and sodium phosphate. The usual content of the astaxanthin, an oxygenated pink carotenoid useful for fish flesh staining, was improved along with with good cell yields (respective values of > 1300 micrograms/g cells and > 5 g cells/L were observed). Yeast invertase and urease must therefore play an important role in the implementation of low-cost culture media.

Carbon↗
PubMed1987

Haemostatic and antialgic effects of the 25 MV photon beam concentrated dose in the treatment of carcinoma of the cervix.

The authors present the results of a preliminary study on the use of a concentrated dose of 13 Gy in 48 hours in the treatment of cancer of the cervix, especially for haemostatic and antialgic purposes and mostly as a first part of a split course of radiotherapy. In 13 patients with early stages of the disease, the method was used as an emergency treatment with good response in 84.6% of the cases without serious complications. In 43 patients with advanced disease, the concentrated dose was generally repeated for palliation and relieved symptoms in about 72% of the cases but with complications in 16.3%. The authors recommend this method only when absolutely necessary to stop severe haemorrhage and suggest that patients with good response to the first flash course should continue treatment with conventional fractionation, bearing in mind the tolerance of the normal tissues.

Adult↗