An autosampler/injector commutator for flow injection analysis (FIA) was constructed with electronic components of used equipments. The apparatus is controlled by commercially available multifunctional interface (PCL711B) connected to a personal computer, and the software was written in Visual Basic language. The system was applied to water analysis and it presented satisfactory results. The lo...

In the early morning hours of July 9, 2008, six adult family members were admitted to a hospital emergency department in Maryland with hallucinations, confusion, mydriasis, and tachycardia of approximately 3-4 hours duration. Approximately 4-5 hours earlier, all six family members had shared a meal of homemade stew and bread. Subsequent investigation by the Montgomery County Department of Healt...

Everyone who initially studies the harmonic oscillator is immediately barraged with examples of pendula and blocks with springs. If the only significance of the harmonic oscillator lay in these examples it would be pretty limiting. In physics, the harmonic oscillator is an extremely important problem, for a simple reason. Say, for example, you have a potential, V (x), for some system and you wa...

ABSTRACT Indole-3-acetic acid (IAA) is a phytohormone produced by many rhizobacterial species to mediate plant colonization while promoting growth. The colorimetric assay widely used analyze the bacterial IAA biosynthesis because it straightforward, cost-effective and fast technique. However, characterization of parts or fractions inoculant formulations rarely performed. This study aimed determ...

Plant growth chambers produce controlled environments, which are crucial in making reproducible observations in experimental plant biology research. Commercial plant growth chambers can provide precise controls of environmental parameters, such as temperature, humidity, and light cycle, and the capability via complex programming to regulate these environmental parameters. But they are expensive...