American chemist Dr. Daniel Nocera has devoted his career to finding this alternative energy source using photosynthesis as his inspiration. Photosynthesis‚ the conversion of solar energy into chemical energy stored in the bonds of glucose‚ is arguably one of the most important chemical reactions on earth. The maintenance of life on earth‚ our food‚ oxygen‚ and fossil fuels depend upon photosynthesis. In this process water and carbon dioxide are converted to oxygen and glucose using energy from the sun
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Courtney S. 4th Period SINKERS and FLOATERS Purpose:The purpose of this investigation is to provide an overview of photosynthesis and to design and conduct an experiment to test the factors that affect the rate of photosynthesis. Hypothesis:If 10 leaf discs are placed into 2 plungers and placed under a lamp the CO2 rate will speed up the process of photosynthesis. Materials: -Fluorescent lamp - Hole punch - 1 Sharpie marker -20 leaf discs -Syringes -12 mL cups Data Table Start 2 4 6 8
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Abstract Stomata is important to plants because of their role in gas exchange and photosynthesis. Clear nail polish and clear plastic tape were used to make leaf impressions of A. floridanum. Once impressions were completed‚ compound microscopes were used to count the total number of stomata per slide. The counts of stomata were used to find stomatal densities‚ along with the open/closed ratios of stomata. Stomatal density and open/close ratio of stomata did not differ between the two locations
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Introduction Carotenoids are natural pigments that exist in nature among both photosynthetic and non-photosynthetic organism. They serve many significant functions some of which are light harvesting and photoprotection in plants‚ promoting reproduction and survival in animals and providing substrates for biosynthesis of hormones and signalling molecules. In particular this essay will explore how the structure of rhodopin glucoside determines its function in light harvesting system LH2 of a purple
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Title: Redox Reactions Research Question: Is it possible to determine if a redox reaction took place by using only the equation? Hypothesis: Yes‚ I believe it is possible to determine if this reaction took place by using the oxidation numbers in the equation. Variables: 1. I cleaned the reaction surface to limit contamination 2. I held the chemicals at approximately a 90 degree angle for consistency Introduction: Redox reactions occur when both oxidation and reduction take place. All atoms
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Lab report Aim : To check the presence of starch in the leaves Hypothesis : the presence of starch can be detected if the specimen turns black blue after iodine solution. Materials : 1) Green leaves 2) Wire gauze 3) Iodine solution 4) Forceps 5) Specula 6) Bunsen’s burner 7) Test tube 8) Water 9) Tile 10) tripod stand 11) glass 12) slide 13) dropper 14) water 15) water bath Procedure: collect dark green leaves (as leaves contain starch) take a water bath and let it heat
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Survival and Leaf Growth of Radishes and Collards in Intraspecific and Interspecific Settings Abstract The purpose of the experiment was to observe how density and competition among individuals of the same species and of different species affects the growth of leaves and survival of collards and radishes. The experiment was carried out in the Greenhouse at the University of South Carolina‚ and utilized set up with six groups with four pots per group. The pots consisted of low density radishes‚ low
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Internal Assessment Coversheet and Self-Assessment Session: Student Name: SL/HL Candidate Number: Investigation title: Investigating a factor that affects stomata density in leaves Syllabus topic(s): Teacher’s Instructions and help given: Candidate declaration: “I confirm that this work is my own work and is the final version. I have acknowledged each use of the words or ideas of another person‚ whether written‚ oral or visual.” Signed: Escalante Date: 15/09/14
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located. In this study‚ we are using beets to study these cellular structures. Beet is a plant whose cells contain a characteristic red pigment‚ called betacyanin. It is located in the vacuole‚ which is surrounded by the tonoplast membrane (Biology 107 Lab Manual 2010-2011). In order for the betacyanin to remain inside the cell‚ the membrane must stays intact; otherwise betacyanin will leak out of the vacuole‚ causing a red color in the surrounding area. The objective of this study was to observe how
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NATIONAL UNIVERSITY OF RWANDA FACULTY OF APPLIED SCIENCES DEPARTMENT OF COMPUTER SCIENCE BACC IV ACADEMIC YEAR: 2012-2013 CHAPTER 1. TOPIC: DESIGN AND IMPLEMENTATION OF AN ONLINE COMPUTER LABS MONITORING SYSTEM CASE STUDY: NATIONAL UNIVERSITY OF RWANDA ICT CENTER/Helpdesk Unit
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