Summary

The influence of various factors of plants production upon the quality of vegetables was determined.

Significant differences in the content of 9 mineral elements were found in 12 tested varieties of snap beans. Proper breeding can enhance the ability of accumulation of desired elements by snap bean varieties.

The effect of different forms of nitrogen, phosphorus and potassium upon the carotenoid content in the carrots were examined. Nitrates were found better than urea form of nitrogen; monocalcium and tricalcium phosphates were similar in action and potassium sulphate had here greater influence than the chloride form.

Experimental evidence, accumulated over a period of 3 years, is given that herbicides, recommended for particular kind of vegetables, do not decrease the nutritional values of the crop. Tomatoes, carrots, root parsley and onions were analysed for contents of dry matter, vitamin C, β-carotene and total acidity.

Effects of ‘Betokson’/β-naphtoxy acetic acid, with a wetting agent/ and ‘Ethrel’ upon the ripening of tomatoes on the vine were compared. Betokson increased more significantly the fruit set and the ripening rate of the fruits. Ethylene and ‘Ethrel’ were compared in their influencing the ripening of harvested green tomatoes. Ethylene was found slighty better, but the differences were not significant.

In a population of the social bee Melipona subnitida of about 200 hives, from Mossoró, Northeastern Brazil, 54 hives were sampled and studied electrophoretically as far as the alleles Est-3^S, Est-3^M and Est-3^F were concerned. Males are produced by eggs laid by workers (no more than 4 in the same day) and by the queen. It was estimated that 61.2% of the drones are sons of the queen and 38.8% are sons of the workers. With these values the effective number (Ne) was estimated in 395.80 which is 24% higher than in a model in which all males are sons of the queen.

Summary

The unusual occurrence of a fibrous histiocytoma of subcutaneous soft tissues, bones, and viscera is described in a newborn infant. The clinical and radiologie picture simulated a congenital fibromatosis, but histologic, electronmicroscopic and tissue culture studies indicated a malignant tumor with a bimodal cell population resembling immature fibroblasts and histiocytes. Although less mature and more uniform, it essentially parallels the findings in the adult malignant fibrous histiocytomas.