Low-cost, low-bandwidth online meetings between farmers and scientists

This paper presents aspects of a nine year research activity into the use of low-cost, low-bandwidth Information and Communications Technology (ICT) to support online meetings between farmers and scientists in rural Australia. It discusses the use of Microsoft NetMeeting" (NM) to support these meetings, and describes the social and technical conditions under which these tools are likely to be useful and used

Use of Unionized Ammonia to Control Zooplankton Grazers in Cultures of Scenedesmus sp.

An experiment was conducted to limit Scenedesmus sp. grazers, as they continue to reduce biofuel yields. 2.5 L cultures of Scenedesmus sp. with zooplankton were inoculated in photobioreactors with 640 mg/L urea. 500 mg/L spike of NH4Cl was used on day zero to test use of free ammonia to control grazers. Cell counts performed with hemocytometer and Gridded Sedgewick Rafter 1 mm2. Ammonia was measured using ion chromatography. Urea may impact zooplankton by day 8 out of 14, with 24-48 hour lag time after accumulating free ammonia. This was confirmed by NH4Cl spike