How do you create references for journal articles in APA format? If you need to write a psychology paper, then you are going to probably need to reference a number of different journal articles. Such articles summarize the results of studies and experiments conducted by researchers on an enormous range of topics.
The problem that second generation biofuel processes are addressing is to extract useful feedstocks from this woody or fibrous biomass, where the useful sugars are locked in by lignin, hemicellulose and cellulose. All plants contain lignin, hemicellulose and cellulose.
Biofuel in the United States. The United States produces mainly biodiesel and ethanol fuel, which uses corn as the main feedstock. In 2005 the US overtook Brazil as the world's largest ethanol producer. In 2006 the US produced 4.855 billion US gallons (18.38Ã10^6 m3) of ethanol.