Unknown sample: Rf = 2.45 3.00 = 0.82 Discussion: Silica gel is a form of silicon dioxide (silica). The silicon atoms are joined via oxygen atoms in a giant covalent structure. However‚ at the surface of the silica gel‚ the silicon atoms are attached to -OH groups. So‚ at the surface of the silica gel you have Si-O-H bonds instead of Si-O-Si bonds. The diagram shows a small part of the silica surface. [pic] The surface of the silica gel is very polar and‚ because of the -OH groups‚ can form hydrogen
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innovations‚ and Samsung Corning is no exception. The company‚ a joint venture between Samsung and Corning of the U.S.‚ is a leader in core electronic materials and manufactures differentiated products for fl at panel displays. We produce high-defi nition PDP fi lters‚ ITO targets and ultra-slim CRT glass‚ and are constantly developing next generation materials and components. These state-of-the-art products are only the most visible innovations. Samsung Corning extends the art of innovation
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variation of fill weight. (with a liquid‚cV< 1% possible) . 2. Patient safety compliance/consumer preference Softgel capsule shel soft/flexible; popular dosage form‚ due to ; Ease of swallowing Absence of taste Convenience (portable‚ robust) Soft gels capsules can be formulated to be taken in different ways; Chewable or lozenges Twist-offs (with a tag allows access to contents) 3. Increased Bioavailability Dissolution of drug from solid state (i.e formulated as an ordinary tab/cap) can be rate
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Abstract In order to experiment with distinct components of a mixture‚ they must be first separated so they can be observed individually. This is accomplished in this lab by the technique called thin layer chromatography (TLC). TLC involves a stationary phase‚ which the TLC plates as well as a mobile phase‚ which could be one of two solvents used: ethanol-acetone for TLC. Dyes in a sample separate consequently because of their unique polarities. As a result‚ nonpolar substances travel further
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Colon Cancer Scenario Introduction: Gel electrophoresis is an important molecular biology tool: it enables us to study DNA. It can be used to determine the sequence of nitrogen bases‚ the size of an insertion or deletion‚ or the presence of a point mutation; it can also be used to distinguish between variable sized alleles at a single locus and to assess the quality and quantity of DNA present in a sample. Gel electrophoresis is a method of separating chemical compounds and molecules by their size
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Paints and Coatings Market - Global Industry Analysis and Forecast to 2020 Paints and Coatings Market - Global Industry Analysis and Forecast to 2020 Paint is any liquid‚ liquefiable‚ or mastic composition which when applied to any object in a thin layer‚ turns or convert to solid film. Paints are commonly used to protect‚ color and to provide texture to the objects. Paints are available in many colors and types such as watercolor or artificial. Coating is referred to a covering which
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