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Water purification with brewer's yeast

18.08.2019

Brewer's yeast and other beer waste can reduce nitrate levels in Spanish waters by up to 40%. This conclusion was made by scientists from the Spanish Center for Advanced Studies Blanes (CEAB-CSIC).

Beer production waste contains microorganisms that process nitrates into molecular nitrogen.

Nitrates are a serious pollutant of European rivers: because of them, the level of oxygen in the water decreases, which affects the underwater flora and fauna. So far, there is no technology that would allow removing nitrates from water at water treatment plants.

Scientists are already testing the effectiveness of their method in several ponds and dams in Barcelona. If this cleaning method proves effective, it will be used in other regions of Spain, especially where agriculture is developed - the main source of nitrates.

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Bear self-treatment 21.06.2017

Zoologists have long noticed that bears often peel the bark from trees and lick a thin layer of cambium from under it - this is the name of the educational tissue up to 1 centimeter thick, from which all other tree cells develop.

Some scientists believe that such unusual behavior of predators helps them get additional food, but according to Russian researchers, this hypothesis is incorrect. The nutritional value of cambium, according to them, is many times less than the energy costs for its extraction.

In order to understand the true reasons for this unusual behavior of predators, scientists collected samples of damaged trees in Primorsky Krai and on Sakhalin Island. In these places, bears most often peel off white-bark firs, and therefore the study focused on these trees.

The scientists analyzed the chemical composition of the cambium from damaged trees using mass spectrometry. It turned out that these samples contain many different antioxidants, as well as probiotics.

Therefore, according to scientists, bears “extract” cambium primarily to maintain a balanced composition of their own microflora and as a biologically active food supplement.

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