Synopsis The purpose of this experiment was for students to prepare some simple organic compound and to purify the compound by recrystallisation. This experiment allowed the students to conduct the synthesis of aspirin‚ acquire the skills of recrystallisation using normal filtration and reinforce the technique of the melting point determination. The method used to synthesize aspirin was esterification by reacting salicylic acid with acetic anhydride with the presence of dehydrating agent‚ conc
Free Aspirin Carboxylic acid Salicylic acid
1. This place has attracted visitors from around the Mediterranean basin for thousands of years. In the Bible‚ it was the place of refuge for King David. It was one of the world’s first health resorts - for Herod the Great. It had been the supplier of a wide variety of products‚ from asphalt for Egyptian mummification to potash for fertilizers. Which place are we talking about? 2. What was formed primarily as a result of defeat of West Germany by Yugoslavia (0–1) in a 1962 World Cup football quarter-final
Premium Primetime Emmy Award Emmy Award Nobel Prize
8. Li J.; Jin Z. Z. Coordination Chemistry Reviews Accepted proof‚ 2009. 9. Hoffmann‚ M.R.; Martin‚ S.T.; Choi‚ W.Y.; Bahnemann‚ D.W. Chem. Rev. 1995‚ 95‚ 69. 10. Mills‚ A.; Davies‚ R.H.; Worsley‚ D. Chem. Soc. Rev. 1993‚ 22‚ 417. 11. Linsebigler‚ A.L.; Lu‚ G.Q.; Yates‚ J.T. Chem. Rev. 1995‚ 95‚ 735. 14. Litter‚ M.I.; Navio‚ J.A. J. Photochem. Photobiol. A: Chem. 1994‚ 84‚183. 15. Martin‚ S.T.; Morrison‚ C.L.; Hoffmann‚ M.R. J. Phys. Chem. 1994‚ 98‚13695. 17. Cao‚ Y.A.; Yang‚ W.S.; Zhang‚ W.F.;
Premium Stem cell Semiconductor Catalysis
to this connection languages also come in contact. Connection among languages causes code switching phenomenon. Code switching refers here to “the alternate use of two [or more] languages within the same utterance or during the same conversation” (Hoffmann 1991: 110). The term intra-sentential is used to refer to switching within the sentence‚ in contrast with the term inter-sentential used for switches between sentences as the relevant unit for analysis. Objectives of the study are:To analyze the
Premium English language Lingua franca Sociolinguistics
to compete with some foreign towns for this Audi investment. Officially Göncz Árpád the then President of the Hungarian Republic opened the plant together with the major of Győr Balogh József and the management of Audi was represented by Jürgen D. Hoffmann the former board president of the Volkswagen group. The success story since then continued. The main aim of the Hungarian Factory to create engine for several Audi and other models but since then the business Activity have widened and in 2011 the
Premium Audi
five hundred years‚ Syphilis has been the most deadly and most common of sexually transmitted diseases until the discovery of the acquired immunodeficiency syndrome (AIDS). Syphilis has been traced back to times as early as 1905‚ when Schauddin and Hoffmann drew attention to the pathogenic agent. The incidence rose heavily during World War II‚ but dropped after with the introduction of penicillin. The lowest levels of incidence were during the 1950s. During the 1970s the numbers of the infected males
Premium Syphilis Gonorrhea Sexually transmitted disease
and R.L. Mancinelli. (2001). Life in extreme environments. Nature 409:1092-1101. Santos‚ A.‚ M. San Mauro‚ A. Sanchez‚ J.M. Torres‚ and D. Marquina. 2003. The antimicrobial properties of different strains of Lactobacillus spp Weirich‚ A.‚ and G.F. Hoffmann. 2005. Ernst Moro (1874-1951) – a great pediatric career started at the rise of university – based pediatric research but was curtailed in the shadows of Nazi laws
Premium Bacteria Lactobacillus
EYEWITNESS TESTIMONY: Do the findings from research on eyewitness testimony suggest that eyewitness testimony should not be admitted in court? An eyewitness testimony is a report made by a person who observed an event. Police‚ prosecutors‚ juries and judges in court generally believe‚ trust and accept eyewitness testimony‚ especially if no other evidence (objects‚ documentary and/or physical evidence) is available and if the eyewitness has no reason nor motivation
Premium Psychology Critical thinking Testimony
Case note on Bruton v London & Quadrant Housing Trust [2000] 1 AC 406 Introduction In essence‚ “leases” are created between landlords and tenants as contracts to grant exclusive possession of the land for a defined period of time‚ in exchange of rent from tenant. Leases give contractual interests to tenants‚ while at the same time creates proprietary interests in the land by granting exclusive possession‚ which elevates a tenancy into an “estate/interest in land”. It can therefore be understood
Premium Contract Management Employment
One of the most significant current discussions in sustainable aviation is alternative fuel for airplane‚ which is a serious argument; however‚ big question is that efforts to produce a more sustainable fuel to power aircraft are technically and ethically feasible. This paper going to investigate and show there is no alternative fuel to power aircraft in this time. The fuel using by airplane is fossil fuel‚ which is Jet A1 by burning this fuel there are impact on the global warming the researcher
Premium Petroleum Coal Methane