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After the fall break they cancelled classes for the first time even in the elite schools with specialized learning of foreign languages , physics and mathematics . The scheme also includes the supply of border boats , pipelines manufactured by the Rustam metallurgy plant , and Georgian sugar , " the diplomat said . Individual brain cells segregate into specialized areas by expressing a wide spectrum of specific housekeeping proteins , enzymes , transporters , and receptors . Background Material - The Molecular Expressions Microscopy Primer provides an advanced series of tutorials about the basics of optical microscopy , photomicrography , digital imaging , and specialized techniques in microscopy . In addition , scientific images now commonly appear in calendars and postcards designed both for commercial and consumer distribution as well as a wide variety of non-scientific periodicals offered for sale to the general public . As such , the use of these photomicrographs ( or digital images ) is regulated by the copyright owners and protected by United States Copyright Law . Together with the scientists and programmers at Molecular Expressions , Nikon microscopists and engineers are providing the latest state-of-the-art information in microscope optics and imaging technology including specialized techniques such as fluorescence , differential interference contrast ( DIC ) , phase contrast , reflected light microscopy , and microscopy of living cells . Bibliography - All of the reference materials used in preparing the Molecular Expressions Optical Microscopy Primer are cited in this section along with other books about electron and scanning probe microscopy , photomicrography , highly specialized microscopy techniques , and older books dealing with the history of microscopy and microscopy in the early twentieth century . The image is sequentially scanned in narrow strips and combined to produce the final signal .