Milligrams of agent

A. Dose. The dose is the quantity of the compound received by the subject. It is usually expressed as milligrams of agent per kilogram of subject body weight (mg/kg). 

The thickness of the absorbent on the TLC plates could be between 0.2mm to 2mm or more. In preparative work, the thicker plates are used and hundreds of milligrams of mixtures can be purified conveniently and quickly. The spots or areas are easily scraped off the plates and the desired substances extracted from the absorbent with the required solvent. For preparative TLC, non destructive methods for visualising spots and fractions are required. As such, the use of UV light is very useful. If substances are not UV active, then a small section of the plate (usually the right or left edge of the plate) is sprayed with a visualising agent while the remainder of the plate is kept covered. 

Volatility is the weight of vapor present in a unit volume of air, under equilibrium conditions, at a specified temperature. It is a measure of how much material (agent) evaporates under given conditions. The volatility depends on vapor pressure. It varies directly with temperature. We express volatility as milligrams of vapor per cubic meter (mg/m3). Calculate it numerically by an equation derived from the perfect gas law. This equation follows ... 

Potassium iodine tablets can be used to reduce radioactive iodine exposure to the thyroid gland. According to the National Council of Radiation Protection and Measurement (NCRP), taking 130 milligrams of potassium iodine at or before exposure to radioactive iodine effectively blocks nearly 100% of radioactive iodine from reaching the thyroid (1977). See Table 3.3 for a summary of antidotes for various chemical and biological agents. 

The experience of the experimental subjects was certainly more like mystical experience than that of the controls, who had the same expectation and suggestion from the preparation and setting. The most striking difference between the experimentals and the controls was the ingestion of thirty milligrams of psilocybin, which it was concluded was the facilitating agent responsible for the difference in phenomena... 

Insofar as it is a liquid-liquid distribution process, paper chromatography is limited by the distribution coefficients of the solutes to be separated and, to an uncertain extent, by the size of the solute molecules.211 Another limitation, as previously mentioned, is the sensitivity of the agents used for detecting the spots. By means of radioautography, a small fraction of a microgram is detectable. On the other hand, unless special techniques are used, a maximum of only 0.5 to 1 milligram of material may be resolved on a paper strip. 

Chodosh S, Lakshminarayan S, Swarz H, Breisch S. Efficacy and safety of a 10-day course of 400 or 600 milligrams of grepafloxacin once daily for treatment of acute bacterial exacerbations of chronic bronchitis comparison with a 10-day conrse of 500 milligrams of ciprofloxacin twice daily. Antimicrob Agents Chemother 1998 42(l) 114-20. 

Lee LJ, Hafkin B, Lee ID, Hoh J, Dix R. Effects of food and sucralfate on a single oral dose of 500 milligrams of levofloxacin in healthy subjects. Antimicrob Agents Chemother 1997 41(10) 2196-200. 

Crystalline antibiotic, moderately hygroscopic. Dec 214-2 IT. [ojff +285-310 (c = 0.7). Freely sol in water, in isotonic sodium chloride soln, and in dextrose solns. Sol in methanol, ethanol, glycerol. pH of 3% aq soln 5.0 to 7.5. Solutions stored at refrigerator temps remain stable for several days. They are rapidly inactivated by acids, alkali hydroxides, and by oxidizing agents. One milligram of benzyl penicillin potassium is equivalent to 1595 units. One international Or U.S.P. penicillin unit is equivalent to 0.6 micrograms of benzylpenicillin sodium. 

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