Prefix divide by Pico- Nano- milli- 0.000‚000‚000‚001 0.000‚000‚001 0.001 centi- 0.01 deci- 0.1 deka- 10 hecto- 100 Kilo- 1‚000 Mega 1 kcal = 1000 cal 1 Cal= 1 kcal 1 cal = 4.184 1‚000‚000 • Neutral atoms contain the same number of electrons and protons. • Components of a mixture can be separated (purified) by physical means. • Physical changes alter a substance without any changes to the chemical composition. • Chemical change involves breaking
Free Atom Electron Chemical bond
Humans need few things for survival: water‚ shelter‚ and food. So why is it that our food‚ something we need to survive‚ has grown so detached from us? Research has shown what we should eat and how much‚ with the illustration of the food pyramid to make it easy. More meats and grains and less fats and oils to stay healthy. Eat right‚ exercise‚ watch portion sizes‚ and all will be well with your body. What Americans do not think about is where their food comes from. Why are there oranges in
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Solar Panel The world’s energy demands increase year after year‚ while its resources are consistently being depleted in order to sustain these energy demands. These limited resources will one day be no more. A dependable source of renewable energy must be found. Currently solar energy is not efficient enough to sustain the population. However‚ the technology is constantly advancing‚ and solar energy could one day be that source. The solar cell’s roots can be traced all the way back
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Biotechnology Advances 27 (2009) 474–488 Contents lists available at ScienceDirect Biotechnology Advances j o u r n a l h o m e p a g e : w w w. e l s ev i e r. c o m / l o c a t e / b i o t e c h a d v Research review paper Transgenic plants for enhanced biodegradation and phytoremediation of organic xenobiotics P.C. Abhilash‚ Sarah Jamil‚ Nandita Singh ⁎ Eco-Auditing Group‚ National Botanical Research Institute‚ Council of Scientific & Industrial Research‚ Rana Pratap Marg‚ Lucknow
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Effects of curing condition of solution cast Nafion® membranes on PEMFC performance Korean J. Chem. Eng.26(3)‚ 679-684 (2009) Thickness of membrane ~ 50µm There are some disadvantages of the solution casting method that the cold cast films are generally mechanically weak‚ susceptible to crack formation and soluble in many polar solvents‚ especially in water at room temperature. Generally‚ the annealed films undergo morphological changes when heated above the glass transition temperature (Tg=109oC
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Clostridium Difficile (C.diff) Clostridium Difficile (C.Diff) Clostridium Difficle is a nosocomial infection acquired mostly in hospitals. In 2005 it was consider the most precarious infection to bombard North American in a decade. Armed with knowledge about the infection‚ transmission‚ environmental factors‚ alternative treatments‚ prevention and ways to control C.diff healthcare workers can better be prepared to help fight the spread of this deadly infection. A C.Diff‚ its transmission
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Food wastage is a problem faced by every developing and developed country around the world. According to a book by Tristram Stuart‚Waste: Uncovering the Global Food Scandal(Penguin‚ 2009)‚ approximately 40 million tonnes of food are wasted by US households‚ retailers and food services each year. This is sufficient to feed the nearly one billion malnourished people in the world. Yet in spite of this trend‚ peope continue to waste food at an alarming rate. Currently‚ a third of food produced around
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International Journal of Global Logistics & Supply Chain Management. Vol. 1‚ No. 2‚ 1 November 2006‚ 90 – 97. Supply Chain Management in the Petroleum Industry: Challenges and Opportunities RAED HUSSAIN Department of Quantitative Methods & Information Systems‚ Kuwait University‚ Kuwait TIRAVAT ASSAVAPOKEE Department of Industrial Engineering‚ University of Houston‚ Texas‚ U.S.A. BASHEER KHUMAWALA Department of Decision and Information Sciences‚ University of Houston‚ Texas‚ U.S.A.
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Cleaning‚ Disinfection‚ and Sterilization of Medical Equipment Cleaning‚ Disinfection‚ and Sterilization of Medical Equipment Introduction Medical equipments and surgical instruments are examples of devices that are essential to the care of patients; however‚ because they typically are designed for reuse‚ they also can transmit pathogens if any of the steps involved in reprocessing‚ cleaning‚ disinfection‚ or sterilization are inadequate or experience failures. Because the vast majority of pathogens
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PRODUCTION OF GRAPHENE IN SPAIN What is Graphene? Graphene is just a one atom thick layer basically an allotrope of carbon in the structure of the sp2 bonded atoms with a molecular bond length of 0.142 nanometers and interplanar spacing of 0.335 nanometers. This makes it as the thinnest compound known to man. It is transparent and flexible and has unique features such as a best conductor of electricity beating silver and copper studies have shown electron mobility Graphene at values
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