Suppose a broth has 436 million bacteria per milliliter. A serial dilution is made using three bottles of 99 milliliters each. 1 mL is transferred from the sample to the first bottle; 1 mL is transferred from the first bottle to the second; and then 1 mL is transferred from […]

A 50-year-old man is hospitalized because of sever congestive heart failure. He has edema of the lower extremities. His exertional tolerance is limited by dyspnea and weakness. On the day of admission the following physical and laboratory values are found:Weight = 80 kg*Blood pressure = 110/85 mm Hg*Heart rate = […]

1. What is the significance of Rf (relative to front) values? Whatinformation can be deduced about the molecules separated by paper chromatography,assuming that you know nothing about each molecule except where it was extracted from? 2. Based on your results, what are the optimum wavelengths of light for absorptionby each […]

1. In the mid-seventeenth century, Dutch scientist Jan Baptista van Helmont struggled to understand where plants get the material that allows them to grow larger. He planted a willow tree of a given weight in a ?xed quantity of soil and then, ?ve years later, weighed both the willow and […]