The following sentences are from a draft of an essay about chemist Alice Ball. To ensure that the paragraph logically builds its claim that Ball's work solved a major clinical hurdle in treating Hansen's disease, in what order should the sentences be placed?
- 1For decades, physicians struggled to treat Hansen’s disease because chaulmoogra oil, the only known remedy, was insoluble in water and could not be effectively absorbed by the human body when applied topically or injected.
- 2In 1915, chemist Alice Ball overcame this obstacle by successfully isolating the active ethyl esters from the oil, converting it into a water-soluble, injectable form.
- 3This breakthrough development allowed the medicine to circulate through the bloodstream, leading to the first successful treatment of patients and the eventual release of dozens of individuals from isolation facilities.
- 4By rendering the stubborn oil easily absorbable, Ball's chemical technique transformed what was once a highly painful, ineffective treatment into a viable cure.
Cevap
The sentences should be ordered: first the description of the insolubility of chaulmoogra oil, followed by Alice Ball's chemical isolation of ethyl esters to overcome the obstacle, then the clinical evidence of patients being successfully treated, and finally the summary of how this technique transformed the treatment into a viable cure.
The correct order establishes a clear problem-solution-evidence-conclusion structure. First, the paragraph introduces the medical obstacle of insoluble oil. Second, it explains how Alice Ball's chemical isolation of ethyl esters solved 'this obstacle'. Third, it provides concrete evidence of success by detailing how the new formulation successfully cured patients. Finally, it concludes by summarizing the broader historical significance of her technique.
Adım Adım Çözüm
Anahtar Kavram
Supporting Claims with Evidence and Details