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КРОК / KROK
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The researcher while conducting the qualitative analysis that involves sulfates precipitation of the third analytical group cations ($Ca^{2+$, $Sr^{2+$, $Ba^{2+$) has to reduce solubility of sulfates. What substance should he use for this purpose?
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Для яких систем характерна седиментація?
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Serology is the leading method of syphilis diagnostics. What test is used to diagnose this disease?
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During examination it appeared that the patient's sclera and oral mucosa are icteric. What biochemical blood value can be expected to be increased?
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What cations belong to the IV analytical group according to the acid-base classification?
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Essential oils are used both in pharmaceutical and cosmetic industry. To extract essential oils from herbal raw material the following technology is used:
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How many stereoisomeric aldohexoses exist?
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During the analysis of the cations that belong to the fourth analytical group (acid-base classification), their processing with a group reagent makes it possible not only to separate, but also to identify the following ions:
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On X-ray examination of the 59-year-old patient, in the lower lobe of the right lung there was detected a distinct shadow, differential for tumor. It was pre-determined that the tumor is benign. Which of the following features characterizes the tumor as benign?
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The student is studying a plant organ with radial symmetry, unlimited growth and positive geotropism. It provides nourishment, vegetative reproduction and plant fastening in the soil. Which of the following is described?
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