Relative to front (Rf) is a measure of how far the mobile phase in a thin-layer chromatograph will move up the stationary phase. Generally, in TLC, the less polar molecule will move further on the plate as usually plates with a polar coating are used....
Colloidal solutions contain a mixture of substances in different phases where particles of one kind are dispersed in another medium. There are different kinds of colloidal solutions. The particles have size in nanometer range and due to very smalls size and weight, they keep on floating in the...
I seldom appreciate the image quality produced with a 2x extender in the optical path, but the EF 300mm F2.8 IS II lens was one of the best with-2x performers, and the RF 100-300mm lens performs similarly (with slightly more but easily correctable lateral CA). Creating high-grade ...
Significant foreground obstructions mean limited openings for shooting in this location, and I couldn't move any further away from this great blue heron. The Canon RF 600mm F4 L IS USM Lens is my usual choice for the selected location. While that lens has a 1-stop aperture advantage, it...
1Vol. 22: 83-100, 1995 DISEASES OF AQUATIC ORGANISMS Dis aquat O r g Published June 15 Tropical reef-fish disease outbreaks and mass mortalities in Florida, USA: what is the role of dietary biological toxins? Jan H. Landsberg Florida Marine Research Institute, Florida Department of ...
What would happen if you carried out a TLC separation of acetaminophen and phenacetin in a normal phase and reverse phase TLC system? Explain which should have a higher Rf value for each type of ... Write out the most important difference ...
Why does sugar dissolve but not dissociate in water even though it is a polar molecule? Explain very briefly why the boiling point of H2O is higher than that of H2. What is the definition of chirality? What are coordination complexes and how do they form?
Why does higher temperature weaken bonds? What is the definition of surface tension? What causes it? Why does a solute dissolve only to a particular extent in water? Explain in terms of intermolecular attractions why soaps and detergents dissolve in water. Why...
What are the steps involved in a synthesis? During synthesis of asprin if the observed melting point is higher than theoretical, what does it mean? Describe two potential hazards when storing dangerous chemical and identify a proper method of preventing a ...
coli HlyA does not need calcium in the medium for its activity towards artificial lipid bilayer membranes, even in the case of HlyA produced in calcium-depleted medium [74]. Similarly, it was noted that the pores formed by Bordetella adenylate cyclase toxin (ACT) in asolectin lipid bilayers...