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  • cotton
  • This layer is usually topped with a small layer of sand or with cotton or glass wool to protect the shape of the organic layer from the velocity of newly added eluent. (wikipedia.org)
  • method
  • A number of enhancements can be made to the basic method of thin-layer chromatography to automate the different steps, to increase the resolution achieved and to allow more accurate quantitative measurements. (wikipedia.org)
  • sample
  • The vitreous humour from the eye may be used, as the fibrous layer of the eyeball and the eye socket of the skull protects the sample from trauma and adulteration. (wikipedia.org)
  • Department
  • Each TLC batch is chemically and physically controlled by our Quality Control department to ensure lot-to-lot and layer-to-layer reproducibility. (silicycle.com)
  • analytical
  • SWV analysis has been used recently in the development of a voltammetric catechol sensor, in the analysis of a large number of pharmaceuticals, and in the development and construction of a 2,4,6-TNT and 2,4-DNT sensor In addition to being utilized in independent analyses, SWV has also been coupled with other analytical techniques, including but not limited to thin-layer chromatography (TLC) and high-pressure liquid chromatography. (wikipedia.org)
  • Niebla
  • with consalazinic acid, sabrosin derivative), and by its relatively thin cortex, 25-50 µm thick, in contrast to 45-75 µm thick in Niebla josecuervoi, which also differs by the cylindrical-prismatic branches. (wikipedia.org)
  • The entire sample was analyzed by thin-layer chromatography from which 55 grams of Niebla caespitosa were later submitted (14 Nov 1985) to the National Cancer Institute (NCI) Natural Products Branch, among 63 other lichen samples, 59 of which were from Oregon. (wikipedia.org)
  • found
  • The shapes of chromatographic columns, originally vertical tubes an inch or so (2 - 3 cm) in diameter, became longer and thinner when it was found that this increased the efficiency of separation. (encyclopedia.com)
  • When looking at a closed system, there is usually a continuous ground electrode found through the top layer made usually of indium tin oxide (ITO). (wikipedia.org)
  • plates
  • The triterpenes of V. ligulata, commonly referred to as T1 and T2 by their Rf values on thin-layer chromatography plates, have formulas of C30H50O2 (T1) and C30H50OO (T2) as determined by mass spectrometry of a sample of V. reptilioderma. (wikipedia.org)
  • liquid
  • The basic principle of chromatography is that different compounds will stick to a solid surface or dissolve in a film of liquid to different degrees. (encyclopedia.com)
  • In the mid-1970s, interest in liquid mobile phases for column chromatography resurfaced when it was discovered that the efficiency of separation could be vastly improved by pumping the liquid through a short packed column under pressure, rather than allowing it to flow slowly down a vertical column by gravity alone. (encyclopedia.com)
  • common
  • Black dot like pycnidia are common and conspicuous along the branch margins, on the cortical ridges, and at the branch tips, undoubtedly due to the relatively thin cortex. (wikipedia.org)
  • surface
  • We achieve narrow-linewidth visible-frequency lasing at room temperature by leveraging surface plasmons propagating in an open Fabry-Perot cavity formed by a flat metal surface coated with a subwavelength-thick layer of optically pumped gain medium and orthogonally bound by a pair of flat metal sidewalls. (cloudfront.net)
  • A hydrophobic layer is applied to the top layer of the system to decrease the surface energy where the droplet will actually we be in contact with. (wikipedia.org)