[Ascorbate index -- an indicator of the level of ascorbic acid and nitrates in plant products].

A simple method to determine potential danger of nitrates by ascorbic acid containing in plant products is designed. The ascorbatic index (content of ascorbic acid/content of nitrates) is calculated for some products. The higher is the value of the index, the more potent is the action of the ascorbic acid and the less harmful is the effect of nitrates in the plant to human body.

[Nitrite concentration in the saliva].

320 persons were tested on the nitrate content in saliva. In experiments were accounted the profession, age, sex, particularities of nourishment, drinking water, habits, diseases, taking medicines, vitamins, contact with toxic substances and so on (29 parameters). The average level of nitrates in saliva of estonians is 4.

[Excretion of nitrates with saliva and urine and nitrite excretion with saliva in patients with chronic gastritis and duodenal ulcer].

The study assessed excretion of nitrates in urine and saliva and that of nitrites with saliva of patients suffering gastric and duodenal ulcer. In both study groups, a positive correlation was established between nitrate concentration in saliva, on the one hand, and that in urine, and nitrite level in urine, on the other. The groups failed to show a difference in nitrate concentrations in either urine or saliva.