[WORLD SCIENTIFIC The Joint Conferences of 2015 International Conference on Computer Science and Engineering Technology (CSET2015) and 2015 International Conference on Medical Science and Biological Engineering (MSBE2015) - Hong Kong (30 – 31 May 2015)] Computer Science and Engineering Technology (CSET2015), Medical Science and Biological Engineering (MSBE2015) - Conductive Polyaniline/Cellulose Nanocrystals Composite for Ammonia Gas Detection