The effect of Lead ions on amylase activity Aim What is the effect of Lead ions on the enzyme Amylase. And does it have an inhibitory effect‚ which causes the substrate‚ in this case starch to be blocked from the reaction process in the enzyme catalyst. Also is the effect reversible or irreversible‚ which is put on the amylase. Method Apparatus and substances required Test tube holder 2% starch solution 6 boiling tubes labelled 1 to 6 1% lead nitrate solution 6 test tubes labelled A to E‚
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Substance abuse could become an addiction when the continued use of a substance becomes compulsive and interferes with the users ordinary responsibilities. It does not only affect those who are addicted‚ but it affects all the members of the family unit. One out of four families will experience problems related to the effects of substance abuse (Mordey‚ 2012). Substance abuse is a family disease that is capable of disrupting family life‚ causing negative effects that can last for a lifetime. The
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Soapy water What affect does adding soap to water have on surface tension? Research: "Soaps and detergents include surfactants‚ that reduce the surface tension of the liquid. This allows the liquid to have a good contact with the material and to remove the dirt from it efficiently." (Kibron.com) "Hydrogen bonding between water molecules leads to many interesting consequences at the visible‚ macroscopic level. For example: the boiling point of water‚ its surface tension‚ and it’s ability to
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Water and Life on Mars Mars perhaps first caught public interest in the late 1870s‚ when Italian astronomer Giovanni Schiaparelli reported using a telescope to observe canali‚ or channels‚ on Mars. By the turn of the century‚ popular songs told of sending messages between Earth and Mars by means of huge signal mirrors. On a darker side‚ H.G. Wells’ 1898 novel The War of the Worlds portrayed an invasion of Earth by technologically superior Martians desperate for water. (1) In the early 1900s
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4/20/16 Chemistry- Water Polarity Mrs. Jenny Polarity: The intermolecular forces between the slightly positively- charged end of one molecule to the negative end of another of the same molecule. Polarity simply means that the molecule has both a negatively and positively charged end. The polarity of water is important because it is responsible for dissolving other polar molecules like ionic compounds (such as salt) and sugars. To form ions‚ ionic compounds must be dissolved in water. This is important
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Substance Abuse is the number one health problem in the United States according to the Robert Wood Johnson Foundation (Worley‚ Conners‚ Crone‚ Williams and Bokony‚ 105). Research from the National Survey of Drug Use and Health reports that 3% of pregnant women used illicit drugs and 3% reported binging on alcohol and after giving birth these numbers increased to 9% and 15% respectively (105). Substance Abuse has plagued human society from time in memorial. Humans have used intoxicants for reasons
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H&M has decided to enter Latvian clothes market. Which strategies and action parameters should company use in connection with the entry into the Latvian market? Anna Atgāze 0 International Marketing and Sales 4th semester 2012 4mfe0212 Final Thesis H&M has decided to enter Latvian clothes market. Which strategies and action parameters should company use in connection with the entry into the Latvian market? Author: Anna Atgāze Supervisor: Morten Friis Frederiksen Delivery date: 1.06.2012 1
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they get the chance to grow physically‚ socially and cognitively but also easily affected by risky behaviours such as misuse of substance. According to Clark and Thatcher (2008) ‚ adolescence is the “developmental period of highest risk for the onset of problematic alcohol and other drug” . Substance abuse refers to the harmful or hazardous use of psychoactive substances‚ including alcohol and illicit drugs‚ which can lead to addiction and is likely to continue into adulthood. (World Health Organization
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Complexometric Determination of Water Hardness by EDTA Titration Bonnie Abella Dr. Asmita Kane Budruk 2/09/2014 Abstract: the complexometric EDTA titration was used to determine the salt substance in the water. This technique for the unknown sample 154 produced a water hardness of 8.43 x105=mg/L CaCO3 from the collected data which corresponds to the typical value from the city of Tempe. Introduction When the water from the rain collects impurities by dissolving the
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Lillebaelt Academy of Professional Higher Education MM 226 Organisation Communication Semester I‚ October 2012 SEMESTER PROJECT – H&M Stoian Ioan Stefan Soc. Reg. Nr. 300693-3397 Keystrokes: 21.663 Teachers: Casper Christensen Mary.M.I Sønderlund 1 Table of Contents Executive summary ........................................................................................ 3 1.0 Introduction .....................................................................................
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