Essays about: "volatile substances"

Showing result 26 - 28 of 28 essays containing the words volatile substances.

  1. 26. Mechanism of zeolite activity in biogas co-digestion

    University essay from Institutionen för fysik, kemi och biologi

    Author : Anna Hansson; [2011]
    Keywords : Anaerobic digestion; methane; zeolites; clinoptilolite; slaughterhouse waste;

    Abstract : Biogas is a source of renewable energy and is produced at anaerobic conditions. The gas consists mainly of methane (55-70 %) and carbon dioxide (30-45 %). Biogas can be used as vehicle fuel after the gas has been upgraded to a methane content of approximately 97 %. There are several companies in Sweden producing biogas. READ MORE

  3. 27. Pepparmyntans bioaktiva ämnen - hur påverkar de människors hälsa?

    University essay from SLU/Dept. of Food Science

    Author : Anton Pallin; [2010]
    Keywords : pepparmynta; örtte; antioxidanter; luteolin; mentol; menton;

    Abstract : Since early civilization, herbal tea has been used as remedies for an abundance of different diseases. Among these herbal remedies, peppermint (Mentha piperita) was used for its effect on bowel related ailments. Even though peppermint was not described until late 17th century, it has been used since 1000 years before Christ by the Egyptians. READ MORE

  4. 28.   Impact of vehicle exhaust emitted by the combustion of biofuels on human health

    University essay from Sektionen för ekonomi och teknik (SET)

    Author : Luiza Panosyan; [2010]
    Keywords : exhaust; emission; biofuel;

    Abstract :   Introduction: Significant changes in the global ecosystem, together with a potential shortfall in oil resources, have stimulated intense interest in the development of other sources of energy, and most particularly biofuels since these are basically considered to be less harmful to human health than petroleum-based fuels. However, information about the impact of biofuel-derived vehicle emissions on human health is limited and incomplete. READ MORE