Caffeine effect on Daphnia’s heart rate Prepared for: Androniki Kloni By: Maria Mitsi October 6‚ 2013 Abstract Caffeine is a bitter‚ white crystalline xanthine alkaloid and a stimulant drug. Caffeine is found in varying quantities in the seeds‚ leaves‚ and fruit of some plants‚ where it acts as a natural pesticide that paralyzes and kills certain insects feeding on the plants‚ as well as enhancing the reward memory of pollinators. An experiment was held‚ on an aquatic
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Materials 1. Different types of paper (printer paper‚ construction paper‚ oaktag‚ tissue paper‚ newspaper‚ etc.) 2. Scissors Directions 1. Choose a type of paper airplane to make. Suggestions are attached to this worksheet. You can also try to make your own! 2. Fly your paper airplanes. 3. Compare the flights of different types of airplanes and different types of papers. Questions 1. Why do some airplanes fly better than others? 2. How do the different papers effect the flight? Are
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enhance the importance of non-traditional security threats. So‚ the securitization of non-traditional security threats compel us to understand Pakistan’s internal dynamics‚ challenges and threats which are directly linked with the spill over effects of the two Afghan wars and partly linked with the issues of mismanagement. Today‚ Pakistan’s internal challenges are terrorism‚ extremism‚ economic woes‚ energy crises‚ unstable political situation‚ ethnicity‚ sectarianism‚ drug mafia and geographic vulnerabilities
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How to make a kaleidoscope HYPERLINK "http://cdn.instructables.com/F69/YSQE/FOHU3OC2/F69YSQEFOHU3OC2.LARGE.jpg" HYPERLINK "http://cdn.instructables.com/F16/VUFB/FORZTL56/F16VUFBFORZTL56.LARGE.jpg" HYPERLINK "http://cdn.instructables.com/FVO/3MJ2/FORZTL55/FVO3MJ2FORZTL55.LARGE.jpg" Step 1: Gather materials HYPERLINK "http://cdn.instructables.com/FYU/XZ3D/FOHU3OCP/FYUXZ3DFOHU3OCP.LARGE.jpg" HYPERLINK "http://cdn.instructables.com/F8P/TJ43/FOHU3OC3/F8PTJ43FOHU3OC3.LARGE
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Introduction Imagine moving to Florida. The first thought that probably forms in your brain is the perfect place - palm trees and sunshine‚ and maybe even some tangerines. Well that is not how the main character‚ Paul Fisher‚ experiences it at all. The protagonist in the novel Tangerine by Edward Bloor has an entirely different experience. Whether it is the bad weather‚ his school‚ or his big-bad brother‚ he definitely isn’t living a paradise. This companion book jumps into Paul Fisher’s complicated
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fabrica? La política de la empresa ha sido históricamente vender juguetes de menos de 5$ aunque desde hace años tienen varios ejemplos de productos de 10-14$ que han tenido éxito. Rechazo de la "vieja guardia". Empresa y entorno competitivo: - Fisher-Price (FP) tiene en 1970 aproximadamente el 2‚0 % de un mercado de unos 1‚5$ billones (Ventas=$30Mill‚ Mercado=$1.500Mill (estimando el mercado “al por mayor” en la mitad de $3.000Mill que es el limite superior en el cálculo de 1968) - El mercado
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words. "Imagine" was released in 1970. The late 60’s was the time of the Vietnam War and also the time when the peace movement was at its peak. Anti-war demonstrations were a common sight on every street corner. Anti-communist sentiments were at an all time high following the war. The countless lives lost by both sides made plenty realize the fruitlessness of war and prompted them to spread the message of love‚ unity and peace. Due to ubiquitous demonstrations all over the world‚ there was social
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What Affects the Rate of Evaporation? Aim * To find out if changes in temperature‚ draught and surface area of water open to air affects the rate of evaporation through the water. * To safely check if these variables change the rate of evaporation * To complete all the experiments in the short period given Prediction * I believe that a raise in temperature will speed up the rate of evaporation in the water * I believe that a larger surface area will speed up the rate of evaporation
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How light intensity effects the Rate of photo synthesis. Aim The aim of my experiment is to find out how light intensity affects the rate of photosynthesis. Prediction I predict that as the light intensity increases that the rate of photosynthesis will increase in proportion‚ so for example if you increase the light intensity from 10cm away to 20 cm away form a stationary plant. There for the rate of photosynthesis will decrease proportionally with the distance of the light from the plant (in
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The Effect of Visual Stimuli on Heart Rate HL Biology James Kosiol Focus Question What is the effect of a timed visual stimuli (45 seconds)‚ in the form of flashing coloured lights (White 0/s (control)‚ White and Black 1/s‚ Blue 2/s‚ Red 3/s‚ Green 4/s and Multicoloured 5/s) on the heart rate of the viewer? Table of Contents 1.Design 1.1 Defining the Problem Focus Question What is the effect of a timed visual stimuli (45 seconds)‚ in the form of flashing coloured
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