in recent years, biosurfactants due to wide applications in chemical, petroleum, food andpharmaceutical industries, have been widely considered by researchers. biosurfactants are produced by aseries of microorganisms, so it is important to screen culture medium and operating conditions in miniaturized bioreactors prior to scaling up to large bioreactors.in this study, using a kind of miniaturiz...

Proof of concept was obtained that Fe(0) can stoichiometrically reduce nitrate to ammonium and that cathodic hydrogen [produced during anaerobic Fe(0) corrosion by water] can sustain microbial denitrification to reduce nitrate to more innocuous products (i.e., N2O and N2). Autotrophic, denitrifying growth on Fe(0) was proven through the use of a dual-flask apparatus. Cathodic H2 from a flask co...

The following procedure is an adaptation of the precipitation and digestion procedures described by Man, Smirnow, Gildea, and Peters (1) and Riggs and Man (2) to distillation in the Chaney apparatus (3) as modified by Riggs’ and application of photoelectric micro calorimetry to the quantitative assay of iodate instead of the usual starch-iodine titration. This procedure permits satisfactory ana...

In this paper, we present Flask, a new programming language for sensor networks that is focused on providing an easy-to-use dataflow programming model. In Flask, programmers build applications by composing chains of operators into a dataflow graph that may reside on individual nodes or span multiple nodes in the network. To compose dataflow graphs across sensor nodes, Flask supports a lean, gen...