1 If a person is diagnosed with diabetes, then the physician may recommend regular HbA1c tests in the future. 2  Depending on the type of diabetes, the patient may need to undergo the HbA1c normal range test after every 3 to 6 months.ed blood cells typically live for approximately 120 days in the bloodstream. This allows an HbA1c range test to determine the levels of sugar occurring in the body for over the past 3 months. As compared to regular monitoring of glucose carried out at home, an HbA1c range test is more reliable and relatively better.
African-American chemist Percy Julian was a pioneer in the chemical synthesis of medicinal drugs such as cortisone, steroids and birth control pills.
Chemistry and plants Percy Julian practiced natural products chemistry, which is the process of separating chemicals from plants, figuring out their molecular structure, and making them in the laboratory. Plant Medicines Â©2006 WGBH Educational Foundation. All rights reserved.uinine and quinidine are both extracts from cinchona bark. Both are still used against malaria parasites. use: Treatment for malaria 10,000 tons of cinchona bark is harvested annually to make drugs to treat malaria.