QUES: Florey and Chain succeeded in purifying the first penicillin, penicillin G, in 1942, but it did not become widely available outside the Allied military before 1945. Later, Norman Heatley developed the back extraction technique for efficiently purifying penicillin in bulk. The chemical structure of penicillin was determined by Dorothy Crowfoot Hodgkin in 1945. Purified penicillin displayed potent antibacterial activity against a wide range of bacteria and had low toxicity in humans. Furthermore, its activity was not inhibited by biological constituents such as pus, unlike the synthetic sulfonamides. The discovery of such a powerful antibiotic was unprecedented, and the development of penicillin led to renewed interest in the search for antibiotic compounds with similar efficacy and safety. For their successful development of penicillin, which Fleming had accidentally discovered but could not develop himself, as a therapeutic drug, Ernst Chain and Howard Florey shared the 1945 Nobel Prize in Medicine with Fleming. Florey credited Dubos with pioneering the approach of deliberately and systematically searching for antibacterial compounds, which had led to the discovery of gramicidin and had revived Florey's research in penicillin.

Who discovered the chemical structure of bacteria?
What is the answer?
ANS: unanswerable
QUES: Nasser was informed of the BritishAmerican withdrawal via a news statement while aboard a plane returning to Cairo from Belgrade, and took great offense. Although ideas for nationalizing the Suez Canal were in the offing after the UK agreed to withdraw its military from Egypt in 1954 (the last British troops left on 13 June 1956), journalist Mohamed Hassanein Heikal asserts that Nasser made the final decision to nationalize the waterway between 19 and 20 July. Nasser himself would later state that he decided on 23 July, after studying the issue and deliberating with some of his advisers from the dissolved RCC, namely Boghdadi and technical specialist Mahmoud Younis, beginning on 21 July. The rest of the RCC's former members were informed of the decision on 24 July, while the bulk of the cabinet was unaware of the nationalization scheme until hours before Nasser publicly announced it. According to Ramadan, Nasser's decision to nationalize the canal was a solitary decision, taken without consultation.

How did Nasser react to the news the the US and UK had blocked construction of th Aswan Dam?
What is the answer?
ANS: took great offense
QUES: On one hand, this means that the Belgian political landscape, generally speaking, consists of only two components: the Dutch-speaking population represented by Dutch-language political parties, and the majority populations of Wallonia and Brussels, represented by their French-speaking parties. The Brussels region emerges as a third component. This specific dual form of federalism, with the special position of Brussels, consequently has a number of political issueseven minor onesthat are being fought out over the Dutch/French-language political division. With such issues, a final decision is possible only in the form of a compromise. This tendency gives this dual federalism model a number of traits that generally are ascribed to confederalism, and makes the future of Belgian federalism contentious.

What component is the Brussel Region?
What is the answer?
ANS:
third component