of molecular weight on the rate of diffusion was measured using two tests namely: the glass tube test and the agar-water test. The set-up of the glass tube test used two cotton balls of the same size. One cotton ball is moistened with hydrochloric acid (HCl) and the other one is moistened with ammonium hydroxide (NH4OH). The two cotton balls were inserted in both ends of the glass tube. NH4OH which has a lighter molecular weight (35.0459 g/mole) diffused with a faster rate (dave=20.25cm) as compared
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imagination and your feelings run wild? The Gospel of Luke tells us what we should do when people hurt us: “But I tell you who hear me: Love your enemies‚ do good to those who hate you‚ bless those who curse you‚ pray for those who mistreat you.”1 Does God know what he is saying? Is he actually telling us to love the people who hate us and pray from them? God is asking us to pray for the people that persecute us. Before I took hold of my life I would always pray in vain. I would make superficial
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The Effect of Molecular Weight on the Diffusion Rate of Substances Jesselyn P. Rodriguez Group 4 Section X-2L August 13‚ 2013 ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- ABSTRACT The effect of molecular weight on the rate of diffusion of substances is tested using two tests: the glass tube test and the agar-water gel test. In the glass tube test‚ two cotton balls were soaked
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life as we know it on this planet‚ and according to Campbell et al. (1999)‚ water is the major constituent of cells. Reactions vital to life occur under aqueous conditions in the body and cells of all organisms‚ and the concentrations of reactants necessary for these reactions depend upon the amount of water present (Pough et al. 2004). By the process of osmosis‚ water moves from areas of lower to areas higher concentration across a water- permeable membrane‚ like a cell membrane (Nybakken and
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The affect of temperature on the rate of movement of woodlice Aim: The aim of this experiment is to establish whether a change in temperature affects the rate in which woodlouse move. I measured the rate by timing the woodlouse to move a set distance of 20cm‚ and altered the surrounding temperature by submerging a clear tube in water with different temperatures controlled by a water bath. Research: It is to be believed there over 3000 different species of woodlice‚ a total of 42 species
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An application such as “PollEv” (http://www.polleverywhere.com/app) would be used for immediate feedback. It allows users to answer questions and vote throughout the session with immediate results sent to the presenter in an appropriate graph which can optionally be added directly into the slides to show the audience trends. Examples of questions are attached in appendix 2. The questions would be asked at the beginning of each new section in the presentation to gauge audience base understanding and
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The Lipid Barrier of the Cell Membrane‚ and Cell Membrane Transport Proteins The structure of the membrane covering the outside of every cell of the body is discussed in Chapter 2 and illustrated in Figures 2–3 and 4–2.This membrane consists almost entirely of a lipid bilayer‚ but it also contains large numbers of protein molecules in the lipid‚ many of which penetrate all the way through the membrane‚ as shown in Figure 4–2. The lipid bilayer is not miscible with either the extracellular
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Osmosis is the diffusion of a solvent across a selectively permeable membrane that occurs in response to differences in solute concentrations (Allen and Harper 2014).Osmosis can fall under the category of passive transport which does not require energy. With osmosis being a type of diffusion it is viewed as molecules moving from a high concentration to a low concentration. To further explain if there is a low water concentration‚ high amounts of solutes will be present. Water will most likely move
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communities water to water his bean field. When the people found out that Joe was “stealing” the water they were upset‚ mad‚ and wanted him to stop. This just goes to show that no matter what you do‚ you can’t please everybody. Society affects peoples behaviors in many different ways. This movie takes place in New Mexico during the 1980’s. During this time New Mexico had already established five out of the six types of societies. These societies include: Foraging‚ Pastoral‚ Horticultural‚ Agrarian
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enter the small intestine through a small duct‚ or passageway. In cystic fibrosis (CF)‚ the ducts in the pan- creas become clogged with thick‚ sticky mucus. This mucus blocks the enzymes from reaching food in the small intestine. This can lead to poor digestion and absorption of food‚ as well as problems with weight gain. Fortunately‚ pancreatic enzyme replacements or “enzymes” are available to help people with CF digest and absorb their food. What Are Enzymes And How Do They Work? Pancreatic
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