... still not generally sanctioned by the scientific community because of a lack of reliable, reproducible data. It would be ten more years before chromatography was widely accepted as a useful analytical method. In 1941, Brockman developed a system to standardize the chromatographic activity of alumina as a stationary phase. This enabled scientists to obtain reproducible results and was a catalyst for further ... A pair of biochemists, A.J.P Martin and R.L.M. Synge, investigated the utility of the technique as a way to improve amino acid separations. In 1941, they developed a liquid-liquid ...

• Word Count: 2140
• Approx Pages: 9
• Has Bibliography
• Grade Level: Undergraduate

... in two ways, the first being ordinary cell division (mitosis), by which the body grows (Yang 182). In this method, one cell becomes two cells, which have the exact same number and type of chromosomes as the parent cell. The second method of cell division occurs in the ovaries and testicles (meiosis) and consists of one cell splitting into two, with the ... areas in sleep records of DS children and also noted extensive monorhythmic 4/sec waves chiefly frontal and parietal in the waking state. Prominent occipital high voltage 1-2/sec waves with a sharp component in the terminal stage were...

• Word Count: 3980
• Approx Pages: 16
• Has Bibliography
• Grade Level: Undergraduate