|ABSTRACT | | | |A solar cell is a semiconductor device | | | |that converts solar energy into | | | |electricity by the photovoltaic effect‚ | | | |representing the fundamental power | | | |conversion unit of a photovoltaic system| | | |‚works under the principle of a P-N | | | |junction that absorbs light ‚ releases | | | |electrons and holes ‚ creating a voltage| | | |in the cell ‚ which is then applied to | | | |load; being environmentally
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Stem Cell Stem cell therapy and stem cell research have been a hot topic over the last several years‚ giving rise to much debate. Many of us may have a general understanding of the controversy‚ but we are unaware of the specific issues surrounding stem cell therapy and its research. Stem cell therapy and stem cell research have been a hot topic over the last several years‚ giving rise to much debate. Many of us may have a general understanding of the controversy‚ but we may be unaware of
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at http://www.jbr.gr Indexed in: WoS (Web of Science‚ ISI Thomson)‚ SCOPUS‚ CAS (Chemical Abstracts Service) and DOAJ (Directory of Open Access Journals) Mesenchymal cells isolation from Wharton’s jelly‚ in perspective to clinical applications Iro KOLIAKOS 1*‚ Nikos TSAGIAS 2 and Vassilis KARAGIANNIS 2 1 2 Stem Cells Bank‚ National Research Foundation‚ Athens‚ Greece C Gynecology Clinic‚ Hyppokrateion Hospital‚ Medical School‚ Aristotle University of Thessaloniki‚ Greece Received: 16
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Summary: Argumentative essay on the topic of drinking on campus. Compares the consequences versus the benefits of alcohol consumption by college students. Drinking on campus is a problem that affects most college students‚ either directly or indirectly. I‚ for one‚ am against drinking on campus. As a student of Stevens Institute of Technology‚ I can say that drinking on campus is as rampant as a fire in a toothpick factory. Several friends of mine at colleges around the country tell me that their
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ALCOHOLS Alcohols are compounds in which one or more hydrogen atoms in an alkane have been replaced by an -OH group. For the purposes of UK A level‚ we will only look at compounds containing one -OH group. For example: Primary alcohols In a primary (1°) alcohol‚ the carbon which carries the -OH group is only attached to one alkyl group Some examples of primary alcohols include: Secondary alcohols In a secondary (2°) alcohol‚ the carbon with the -OH group attached is joined directly to
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Conversion of Alcohols to Alkyl Halides Title: Conversion of Alcohols to Alkyl Halides Abstract: In this experiment the conversion of alcohols to alkyl halides are investigated through reflux and simple distillation. These are common procedures used to separate substances. After the reflux and distillation is complete 13C NMR and IR spectrum is used to identify the product or products for each reaction: 1a‚ 1b‚ and 2. Every individual in the group was assigned either 1a (1-propanol) or 1b (2-pentanol)
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Comparing the enthalpy changes of combustion of different alcohols Aim In this experiment I will investigate the enthalpy changes of combustion. In particular I will be investigating the enthalpy change of combustion for different alcohols. I hope to investigate some of the homologous series alcohols‚ as well as a few structural isomers of these alcohols. Background & theory Enthalpy cannot be measured. What we can actually measure is the enthalpy change from the reactants to the products.
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Lobbying in Alcohol industry in EU 1. Alcohol industry in EU The economic role of the alcoholic drinks industry is considerable in many European countries. Alcohol excise duties in the EU15 countries amounted to €25 billion in 2001‚ excluding sales taxes and other taxes paid within the supply chain – although €1.5 billion is given back to the supply chain through the Common Agricultural Policy. Due to the relative inelasticity of the demand for alcohol‚ the average tax rates are a
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so did the use and abuse of drugs and alcohol. The invention of the automobile increased the dangers of the abuse and use of these drugs. Each year in the United States and Canada‚ alcohol abuse is the cause of 100‚000 deaths. Alcohol is also the drug that children ages 12 to 17 most commonly abuse. Teenagers become eligible to obtain their drivers license during these years‚ alcohol abuse is the leading cause of teenage deaths. People who abuse alcohol are more likely to abuse other drugs as
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to failure in the future. Although many of us listened and didn’t drink from a young age and waited till it was legal some of us didn’t. Alcohol is a drug. Every day more than‚ 4‚750 American kids at the age of 15 or younger take their first sip of alcohol. Kids who start drinking before the age of 15 or more likely to become an alcoholic or an abuser of alcohol. When teenagers start to drink it usually has to do with low self-esteem or they think that it will make them feel happier with all the stress
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