Kristina Johnson SCI-101 Introduction to the Sciences November 30‚ 2014 Bisphenol A Bisphenol A‚ otherwise known as BPA‚ is a carbon based synthetic compound belonging to the group of diphenylmethane derivatives and bisphenols. The chemical formula for BPA is (CH3)2C(C6H4OH)2. BPA was first synthesized in 1891‚ and was recognized as a synthetic estrogen in the 1930s. The Food and Drug Administration (FDA) approved the use of BPA in 1960 to manufacture certain plastics and epoxy resins. This chemical
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Mining is the process of digging beneath surface of the earth and extracting minerals and other useful geological materials. There are two main categories that mines fall into; surface mines and underground mines. Surface mines are effective at extracting minerals and geological materials that are close to the surface of the earth while underground mines are designed to extract minerals and geological materials that are deep beneath the surface of the earth. One of the most common materials that
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of the Ratio of Surface Area to Volume on Transformation Efficiency in Escherichia coli K-12 Eliana Pouchard‚ Steve Teng‚ and Cameron Wong Department of Microbiology & Immunology‚ UBC In the process of transformation‚ bact eria take up DNA fr om the environment through their cell wall. To induce competence in the cells‚ the DNA for uptake must first attach to the cell surface prio r to passing throug h the membrane. Previous studies on the effect of surface area on transformation
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Surface Tension Steven Brignol Dr. Payne September 15 Introduction: Water’s ability to stick to itself is surface tension. In this lab we were able to measure and detect surface tension by dropping water‚ drop by drop‚ onto a penny. The quantity of droplets that fit on the penny was impressive. Hypothesis: The detergent will thicken the water making a tighter surface tension. Prediction: If soap increased the surface tension‚ then expansion will happen. Materials: (1) Pipette (2) Water
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12. Provide a description of a cell surface specialization. A cell surface specialization can be defined as an extension of the cell surface which performs a specific function for a larger organ or tissue. Examples of cell surface specializations include microvilli‚ cilia‚ stereocilia‚ and goblet cells. Microvilli can be described as tiny finger-like folds made of microfilaments in the cell membrane‚ and functions to increase surface area for absorption. Cilia are longer‚ more hair-like projections
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The Aspire of Importing and Exporting _______________ gave this class a chance to help them figure out which floor matting will help a cargo box stop from moving. One factor that is used is friction. Friction happens when two surfaces rub against each other and may cause heat. Also there are four types of friction which are static‚ sliding‚ rolling‚ and fluid friction. The company needs the class to find out what type of flooring is best to use to stop a cargo box from moving. They have game
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A Child Called It: Book Summary "A Child Called "It" is David Pelzer’s tale of abuse and neglect as a young child. David begins his story talking about the physical hits he is taking from his mother while doing dishes and trying to find out where he can find some food. After finishing the dishes he is rewarded with the leftovers from one of his brother’s cereal bowls. When he arrives at school he finds social workers there who have to interview him‚ and he is removed from his home. He has been
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Carp Bait - Part Four Fishing with surface baits is both an exciting and very productive method for catching carp. On many waters‚ it’s often an under-used tactic‚ which is a big mistake‚ because some of this country’s biggest and most sought-after carp are often caught on surface baits at this time of the year. Even if the lake that you are targeting has been hammered on floaters and the carp are starting to wise up to the approach‚ often a change to an alternative floating hook bait is all that
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Caitlyn Dube 14 February 2012 A Girl Called "Genius" Adeline Yen Mah captures the story of her youth in the novel Chinese Cinderella. Adeline’s childhood was filled with rejection by her family‚ but in school she found a place of refuge and people who would respect her. The abuse she has received from her family caused her pain every day‚ but it also helped her to learn how to rely on herself. This novel is about a young girl named Adeline‚ mistreated through her
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A symbol is defined as an occurring object that stands for something. In “A Child Called It” By David Pelzer‚ many symbols are shown throughout the book. The symbols used in the book are things that David’s mother used to hurt him physically and mentally‚ but the biggest symbol of all was food‚ and how it symbolizes David’s reward from his mother. Food was one of David’s main priorities in his childhood because of the lack of food he was given. David would have to get all of his chores done fast
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