The finding of a STIC lesion is not routinely noted in pathology reports however, possibly because of the lack of serial sectioning of tubes and ovaries in the general population, when no germline mutation is present. Detailed Vehicle Recall Notices and Technical Service Bulletins (TSBs) from ALLDATAdiy.com. Serial Block-Face Imaging; EBIC; EBSD; EDS/EDX; Products. Enables cross sectioning within minutes. JEOL F2 and Gatan: The new world for in-situ applications. Research > Soft Lithography and Unconventional Nanofabrication. Unconventional Nanofabrication. Nanofabrication is the process of making nanostructures that have arbitrary patterns with interesting physical properties. While we have pioneered many unconventional nanofabrication techniques in the past (Figure 1) – including soft- lithographic methods based on elastomeric stamps (micro- contact printing) or stencils (dry resist and lift- off with PDMS membranes), original photolithoghraphic methods based on arrays microlenses obtained by reflowing polymeric posts or by using polystyrene microspheres (microlens lithography), and methods based on thin sectioning of vertical structures to prepare thin layers of materials with controlled lateral dimensions as small as one nanometer (nanoskiving) – we have focused, in the last few years, on the development of unconventional nanofabrication approaches for the design, preparation, and screening of optical metamaterials. The limitations of conventional approaches have limited the efficiency of exploratory research in this field, to the point that fabrication has been the limiting step for innovation.
For instance, serial techniques such as focused ion beam (FIB), or electron beam lithography (EBL) provide ultra- high resolution, but are inefficient when one needs to prepare many samples in a short amount of time. These techniques, therefore, only permit one to fabricate specific targeted sample geometries for which the properties are typically predicted beforehand. A further, and very important, limitation that is worth noting is that access to such fabrication equipment can be extremely limited, or non- existent at some research institutions. Based on those premises, we seek to develop low- cost, fast, parallel, high- resolution unconventional fabrication techniques that allow for greater flexibility in patterning at resolutions relevant to optical applications (in either the visible, or the NIR to MIR range). Our current efforts are centered on two techniques: - Shadow sphere lithography (SSL)- Microlens lithography (. In SSL, the controlled angled PVD through a universal colloidal mask allows us to generate a nanoscale pattern with very high fidelity and very high resolution (see Figure 2). SSL allows us to perform high- throughput fabrication of complex metamaterial structures with sufficient quality for optical applications, and allows us to fabricate multimaterial nanostructures in a single pump- down cycle of the electron beam evaporator, by simply changing the materials and adjusting the angles of evaporation without having to remove the sample from the chamber. The ease of use of the method and the natural polycristallinity of the self- assembled colloidal masks provide both a fast iteration between designs, and a natural opportunity for discovery. Following the same principles, we are currently working on extending this technique to the fabrication of metamaterials with lattices that are different from a simple hexagonally close- packed arrangement. Microlens Lithography. Some years ago, we developed microsphere lithography as a technique in which the image of a microscopic mask is reproduced by projection photolithography by an array of microlenses. In this process, the projection is done at a reduction factor of c. Every microlens in the array projects an identical image of the mask, and the iteration from sample to sample can be done in a matter of minutes, with the limitation for the fabrication of a new structure being limited by the fabrication of a mask, which can be easily accomplished on a commercial laser cutter. We are now developing and optimizing methods to produce non- periodic plasmonic arrays of nanostructures by microlens lithography. SIU SOM Histology INTROINTRODUCTIONMost fresh tissue specimens are colorless and squishy. Fixation stabilizes and preserves the tissue. Sectioning (slicing) provides the very thin. Staining provides visual contrast and may help. Most basic histology texts offer a minimal account of basic histological. EMBEDDING and SECTIONINGAfter fixation, tissue specimens are routinely embedded. To embed a tissue sample, tissue water is replaced first. Sectioning is the production of very thin slices from a tissue sample. Sectioning necessarily reduces the specimen to a two- dimensional. Yet other common artifacts are scratches and . NOTE that all stain color. Hematoxylinis. a basic stain with deep purple or blue color. Some cell structures do not stain well with aqueous dyes and so routinely. Trichrome stain. Trichrome. For more on special stains, see the presentation at Web. Path. Comments and questions: dgking@siu. SIUC / School. of Medicine / Anatomy / David. Kinghttp: //www. siumed. Last updated: 1. April 2. 01. 0 / dgk.
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