http://chemkeys.com/en freedom to learn Fri, 26 Feb 2010 13:30:08 +0000 http://backend.userland.com/rss092 en Abstract Acids and bases are chemical compounds always present in our daily life. They are important raw materials in manufacturing industries and are necessary for the control of various industrial processes. They participate actively in living organisms’ metabolism and, if improperly disposable they can alter the environmental conditions necessary to the ... http://chemkeys.com/en/2010/02/26/basic-analytical-chemistry-acid-base-concepts-and-the-ph-scale/ convert.exe (v. 4.08 - 0,57 MB) This program is designed to run on Windows and allows the conversion of data between different units. It is an executable program, easy to use, developed by Josh Madison and can be used freely (freeware). josh@joshmadison.com In English http://chemkeys.com/en/2010/02/12/conversion-of-units/ Abstract The Brazilian Society of Soil Science launched, in 2009, during the XXXII CBCS meeting, in Fortaleza, the book "Chemistry and Mineralogy of Soil" in two volumes (Part I - Basics, Part II - Applications), totaling 1380 pages. This book covers a large gap for the lack of basic teaching materials ... http://chemkeys.com/en/2009/11/24/chemistry-and-mineralogy-of-soil/ Abstract The Chemical and physical phenomena and the principles applied in qualitative analysis to identify ions in aqueous solution are the same ones used in quantitative analysis of different samples and are still used in many official reference methods, including instrumental methods or procedures. This shows the importance of knowledge of ... http://chemkeys.com/en/2009/11/12/basic-analytical-chemistry-applications-of-the-fundamentals-of-qualitative-analysis/ Abstract Obeying the fundamental law of nature that says, "a physical or chemical system always tends to cause an irreversible change from some state of initial non-equilibrium to a final equilibrium”, chemical reactions can be defined as processes in which different substances interact with each other, with a rearrangement of atoms ... http://chemkeys.com/en/2009/09/23/basic-analytical-chemistry-ionic-equilibrium-in-aqueous-solution/ Abstract Download In today's globalization, the competitiveness of each nation appears, increasingly, linked to the creation of a strong and cohesive Science, Technology and Innovation system (S,T&I), that allows cooperative actions and encourages technology transfer. In the Brazilian context, the government has been carrying on efforts towards strengthening the innovative activities in ... http://chemkeys.com/en/2009/09/22/technology-transfer-structuring-and-management-strategies-of-technological-innovation-centers/ Abstract The content of Inorganic Qualitative Analytical Chemistry usually used by Brazilian Higher Education Institutions (HEIs) covers the theory of chemical equilibrium in aqueous solution and, in the laboratory, the separation and identification of cations and anions in solution or solid samples, using classical methods. As there are still opinions both ... http://chemkeys.com/en/2009/09/12/basic-analytical-chemistry-the-role-of-analytical-chemistry-in-the-formation-of-classical-chemist/ Abstract History shows that nothing is totally new and therefore the old should not be discarded, but known so that new knowledge can be constructed. Thus, when interviewed by Rudy M. Baum, Henry Taube, Nobel Prize in Chemistry in 1983, said that the disappearance of qualitative analysis from the curriculum of ... http://chemkeys.com/en/2009/09/12/basic-analytical-chemistry-a-historical-overview-of-classical-qualitative-analysis/ Download There is substantial evidence of the complexity of selenium speciation in living organisms and of the importance of the selective determination of the particular species of this element in order to understand its metabolism and biological significance in clinical chemistry, biology, toxicology, and nutrition. The state-of-the-art of analytical techniques available for ... http://chemkeys.com/en/2009/08/13/species-selective-determination-of-selenium-compounds-in-biological-materials-2-ing/ The programs presented here are divided into two groups: the interactive and non-interactive. The interactive ones do not require any special format for data entry. The data are requested on the screen as the program needs them. The non-interactive programs are a little bit different. It requires data files written ... http://chemkeys.com/en/2009/08/07/tutorials-and-computer-programs/