Students examine a demonstration size model of DNA or an alpha helix, and use their fingers to identify which atoms / base pairs are particularly involved in hydrogen bonding within the molecule, causing the helical structure. Students then discuss how the increased UV light because of ozone deple...
Define the term "chromatography" as it has been used in the separation of a mixture. Describe how linear accelerators work. How is the basic principle of separation processes used in everyday life? How can TLC (thin-layer chromatography) and column chromatography be us...
Evaporation may be explained by considering the attractive forces involved and the kinetic energy needed to overcome these forces. This process is the opposite of condensation. For a molecule to be converted to gas from a liquid it must have enough energy to overcome its attractive forces. In ...
It's a hydrocarbon molecule that gives gasoline the ability to resist detonating prematurely in the engine, which causes engine knocking or pinging during combustion. An octane rating measures the amount of the molecule that is in everyday gasoline. The higher the octane number, the greater the ...
Physicalistic idealism is notanimismor vitalism. Its advocates no more believe that a rock is a unified subject of experience than does, say, an eliminative materialist like Daniel Dennett. In common with every other naturalistic theory, the physicalistic idealist still has a lot of work to do...
The Van't Hoff Factor (i) is a very important constant used widely in determining the colligative properties (boiling point elevation, freezing point depression, osmotic pressure) of different solutions. For most calculations, the theoretical value of the Van't Hoff f...
Sammy Woodhouse, who was abused as a teenager by the Rotherham ringleader Arshid “Mad Ash†Hussain and has waived her right to anonymity, said abuse was underway “all over the countryâ€. “It’s an issue for every town and city, more people...
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(R2) were evaluated from the slope of plots by linear regression analysis. For the Korsmeyer–Peppas model, the fraction of drug remaining at time t was determined for every time interval log (Mt/M∞) and plotted against the log of time t. The slope of the line was taken as the value...