Agar (малайск.; synonym: an agar-agar) – received from some seaweed (for example, from Ahnfeltia plicata laver) the material forming dense gel (jelly) in aqueous solutions. The agar is applied to preparation of mediums in microbiology. Also it is used in food, pharmaceutical and other industries.

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According to WHO researches the daily half-hour conversation by the mobile phone increases probability of development of a tumor of a brain by 40%.