Brian Toohey Biology Mrs. Heimforth 12/06/10 Diffuse the Osmosis Section 2: Introduction Step 1: The scientific concept of this lab was to see how osmosis transferred the substance through the cells to reach equilibrium. Step 2: My hypothesis was that the bag with 60% sucrose then it would be heavier than the bag with tap water or 30% sucrose. I thought this because I thought that there would be more of a substance change in 60% sucrose. Section 3: Methods First get 3 pieces of the same
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Natural Dyes from Plants in Producing Colored Paste Abstract: Paste is a type of glue made from starch or dextrin‚ a starch product. This investigatory project shows that we can produce our own colored paste without spending much time and money and by performing simple steps. That’s why this Science Investigatory Project can help students save their money instead of spending it in buying expensive and commercialized colored glue. In addition‚ this colored paste can be an additional source of
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of dollars. Most of these resources‚ however‚ did not go into the theory of designing a bomb‚ as design was a relatively small part of the budget; rather‚ the money and manpower were needed to produce weapons-grade plutonium and uranium. Gaseous diffusion was‚ at the time‚ the most efficient way of separating the 235 U and 92 238 U isotopes.1 92 The question of why scientists entertained the idea of a uranium bomb at all is an intriguing one. Bohr had already demonstrated that uranium‚ when undergoing
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The purpose of this lab was to observe how molarity concentration affects diffusion.The lab was primarily based on osmosis and diffusion. Diffusion is when the movement of molecules from a high concentration that go to a low concentration to a high concentration to eventually reach an equilibrium. Osmosis is when water will diffuse from high water concentration to low water concentration to reach equilibrium. When the solutions are different the lower concentration solute is hypotonic while the higher
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Purpose: To determine the reaction order with respect to crystal violet dye. Procedure: Turn on a Spectronic 20 and warm it up for at least 15 minutes. Be sure the wavelength is set to 540nm. When the instrument has warmed up‚ use a clean small test tube from the drawer filled 2/3 with the first NaOH solution that is planned to use‚ as a blank set 0% and 100% transmittance. Take a %T reading every minute for at least 15 minutes so it may be convenient to wait until the room clock’s second
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The Effect of Molecular Weight on the Diffusion Rate in Substances Nadjah B. Hadji Amer Gladys A. Oliveros Rochelle R. Yaῆez Jan Remon B. Caliguid Group 2- Sec. W78-1 August 14‚ 2013 A scientific paper submitted in partial fulfilment of requirements in Biology 101.1 under Prof. Kimverly Hazel Coronel‚ 1st sem‚ 2013-2014 ABSTRACT The effect of molecular weight on the rate of diffusion was assessed using the agar-water gel test. The agar-water gel set up was composed of a six petri
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observers are more likely to take action if there are few or no other witnesses. Bystander effect has been a problem for a long time. There have been many cases where this has been proven to be true. These variables include: ambiguity‚ cohesiveness and diffusion of responsibility. A person’s life could change within a blink of an eye. It is absolutely horrifying to be aware that people will not help a person in need if there are others
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permeable membrane through a process of diffusion. The movement of a solute through this membrane is called dialysis . Diffusion is a form of passive transport. It is the movement of molecules from areas of higher concentration to those of lower concentration‚ until there is an even concentration. This movement is random because it is a result of kinetic energy. Diffusion is a slow process‚ but there are many factors that will affect it’s rate. The rate of diffusion will vary depending on the size of
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subject been chosen........................................................................... 7 2.2 Why cotton fibers & reactive dyes been used…...............................................7 2.3 Why time is necessary for dyeing cotton fabric with reactive dye....................7 2.4 Effect of time for dyeing cotton fabric with reactive dye………………..……7 2.5 What is organic cotton and how is it grown……………………………….......8 2.6 Why does the industry want to use organic cotton………………
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November 26‚ 2012 Basic Sciences 1 – News Essay New Surgical Technology: Adoption or Diffusion? This article raised an interesting subject: surgeons and patients seeking improved treatment often forget that a new technique is not necessarily a better one. Human body with its health problems remains the same but the surgical technology is always moving towards progress. People develop new surgical tools and new surgical procedures constantly. However‚ do we carefully test all these new tools
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