investigate the effects of temperature on the growth rate pine seedlings. Experiment 1 A batch of 60 pine seedlings (Batch I) was grown in a greenhouse under controlled temperatures. Ten plants were grown at each of six temperatures from 50 C to 300 C. These plants remained at their original temperatures 24 hours each day for two weeks. All other conditions were the same for all seedlings. The growth rates are shown in Table 1. Table 1. Growth rates for pine seedlings in Batch I Experiment II A
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Osmosis investigation Aim: To investigate how sugar concentration affects the mass or size of a potato and find out the sugar solution. Introduction: Osmosis is the movement of water molecules across a partially permeable membrane form a region of high water concentration to a region of low water concentration until the concentration on both sides is equal. This means that osmosis is like diffusion involving water molecules. Osmosis occurs across a partially permeable membrane‚ with holes
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the water diffused at a higher temperature. Temperature can also affect the rate of diffusion because a higher temperature will cause molecules to move faster and increase the rate of diffusion‚ allowing more pigment to pass through the membrane‚ in the 5 minutes given‚ giving a more pink/red color to the water surrounding the beetroot at a higher temperature‚ and at lower temperatures slowing down the molecules and making the rates of diffusion lower in colder temperatures‚ giving it a paler appearance
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been changed. The lab demonstrates the use of chemical molecular behavior to isolate a particular set of molecules. Caffeine had already existed in the leaf itself but needed to be separated from the other chemicals. Caffeine’s chemical structure is relatively similar to the nucleic acid purine in that they use nitrogen and is bicyclic but lacks an alkene‚ amine and an amide. Caffeine has a solubility of 67.0 g/100 mL in boiling water but tannins also boil in hot water to form catechin. Catechin cannot
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One can predict that the tube with the highest concentration of yeast will produce the most carbon dioxide and will have the fastest rate of alcoholic fermentation. Results Two separate experiments were conducted to determine the effect of yeast concentration and pH level on the rate of fermentation. The first experiment involved the placement of different concentrations of yeast‚ glucose‚ and distilled water in four different tubes. Pipette pumps were
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India Proposes Regulation of Energy Drinks‚ and Caffeine Introduction 1. Energy drinks are non-alcoholic beverages containing caffeine‚ guarana‚ glucuronolactone‚ taurine‚ ginseng‚ inositol‚ carnitine‚ B-vitamins etc. as main ingredients that act as stimulants. In recent years‚ a number of different energy drinks have been introduced in the Indian market to provide an energy boost or as dietary supplements. These drinks contain high levels of caffeine which stimulates the nervous system. 2. Energy
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higher the rate of reaction. Graph 5 further supports the original hypothesis‚ as it demonstrates the change the rate of reaction according increased volume of hydrogen peroxide‚ whereby the fastest rate of reaction occurred at the highest number of drops added to the solution.
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The effects of different wavelengths of light on the rate of photosynthesis Introduction This experiment was performed to investigate the effects of different wavelengths of light on the rate of photosynthesis. If a multiple colored film petri dishes are place under a 50 watt lamp‚ then the rate of photosynthesis will be greater for those with red‚ blue and clear film‚ than those with green and black film. We believed the petri dishes with the red‚ blue and clear film would produce the best
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Chapter 3 Research Design and Methodlogy This study is conducted in order to asses the effects of caffeine in the endurance of the atheletes. The focus of the assessment was on the caffeine on how it will work as a endurance enhancer to the athletes. In order to gather the necessary data‚ the researchers’ utilized the experimental method. According to Kendra Cherry‚ 2007‚ The experimental method involves manipulating one variable to determine if changes in one variable cause changes in another
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Quitting caffeine is something that I had been thinking since months ago‚ but I had never decided to do it until today. Really‚ today was not that bad. First‚ in the morning I had breakfast and I didn’t look to the coffee maker. At school‚ I felt weird about go to the cafeteria and don’t ask for a coffee as I used to do every day with my friends‚ but it wasn’t a big deal because instead I drank a juice. Today was a little hard for me because when I woke up in the morning I felt the smell of the
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