Micro-dimension

One of the most widely used chemical plants is certainly the exhaust pipe section of an automobile. The exhaust pipe system of automobiles shows all features of a chemical plant, as it consists of a catalytic reactor, supply pipes for the gases, heaters and control equipment such as the lambda sensor. The catalyst carriers of an exhaust pipe are not called micro structured reactors but, considering their micro dimensions, they actually belong to this group of reactors. 

Internal medicine, urology, gynecology, otolaryngology, maxillofacial and plastic surgery could be potential users of this designed nanocellulose. For this reason, hollow cellulose tubes with different inside diameter and different wall thickness have been prepared in micro-dimensions. Figure 14 shows a collection of BASYC tubes. Foils, patches, and other shapes are possible, too. 

The macro-micro dimension organises the space according to the scale of tourism being considered, with the macro pole referring to studies of large systems and whole regions. By way of contrast, the micro scale applies to sites as well as to more individual and small group analyses. 

Implicit in the above is the notation that current-voltage curves measured at macroelectrodes for all but fast voltage scan rates are characterized by a mass transport limited current plateau rather than a current peak as in linear sweep voltammetry at a planar electrode of larger than micro dimensions. 

MALDI in Micro Dimensions Instruments and Mechanistic Differences 1137... 

An important aspect of nanotechnology is the vastly increased ratio of surface area to volume present in many nanoscale materials, which makes possible new quantum mechanical effects. One example is the quanmm size effect where the electronic properties of solids are altered with great reductions in particle size. Nanoparticles, for example, take advantage of their dramatically increased surface area to volume ratio. Their optical properties, for example, fluorescence, become a function of the particle diameter. This effect does not come into play by going from macro to micro dimensions. However, it becomes pronounced, when the nanometer size range is reached. 

---