CHEMISTRY

Hydroxyapatite - from dental care to cancer treatment

By Nicola Stanislawska & Maria Rutkowska

Do you ever wonder what is inside the toothpaste you use? Its contents are carefully selected to contain diverse types of ingredients that assist in the upkeep of your dental health. An example is fluoride - a naturally occurring mineral that keeps teeth strong, suppressing acid production and promoting remineralization in places where cavities are just beginning to form. But have you heard of hydroxyapatite?  

 

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A study into the relationship between starch concentration provided to bacteria and their enegry production in a Microbial Fuel Cell

By Karla Delgado

Microbial Fuel Cells produce electric energy from oxidation reactions done by microbes, including glucose oxidation. Although these are very effective and a renewable way of producing energy, it is still under research which ways can be used to maximize its production of energy. It was hypothesized that, as starch is a glucose polymer, if increasing starch concentration, energy production could be maximized. A Microbial Fuel Cell was built and varying concentrations of starch were used to feed the bacteria. The results were that, as predicted, there was a growing tendency. However, a plateau was reached. It was concluded that increasing starch concentration is an effective way of increasing the production of energy in a Microbial Fuel Cell, but a better design of the salt bridge, and a further study of the enzymatic activities outside and inside the bacteria, would give us a better view of what could be done in order to produce a higher voltage before the plateau is reached.

 

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Environmental chemistry for everyone through the Microbial Fuel Cell

By Perla Marysol Peña Reséndiz

The current energy demand has become a crisis whereby nations encourage the use of sustainable energy. Most of the technological systems that are proposed are only suitable, in terms of maintenance, for developed countries; on the other hand, for nations in inferior positions, this option does not exist, hence the importance of promoting renewable energies based on organic matter, which we produce every day; in this way, we foment the fight against the energy crisis. The usefulness of Organic Ingredients from plants is investigated for the functioning of a Microbial Fuel Cell, taking advantage of organic waste, and simultaneously demonstrating that anyone is capable to benefit the planet with the study and application of Environmental Chemistry.

 

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