[Method for determination of creatine in minced meat].

A rather version of picrate method for determination of creatine in minced meat is proposed. It is suitable for application in laboratories of meat-processing plants.

[Jaffe color test-based microtechnique for determination of milk lactose].

The picric acid reaction (Jaffe test) that is widely used in clinical biochemical practice to determine creatinine has proven to be suitable for the assay of lactose in milk samples. The reaction conditions (picric acid concentration, sample heating time, etc.) were examined to optimize this method.

[Urea as an indicator of anthropogenic pollution of water of swimming pools].

The sports swimming pools of Volgograd were examined for the levels of urea. All the study swimming pools were found to have a level of urea in the range of 28-80 micromol/l; which is about 10-15 times higher that its background level in the natural water reservoirs. Analysis of urea in the water of a swimming pool is proposed as a sensitive and simple test for fresh man-made water pollution.