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
Premium Osmosis Chemistry Concentration
Concentration The Problem In many colleges over 8% of the students report problems concentrating on their studies. Most of these students blame outside distractions for their problems. Many research studies manipulating noise levels and distractions have found that such disturbances may increase‚ decrease‚ or not even affect concentration. These researchers have therefore concluded that distracters don’t cause concentration problems directly. It is the way the distracters are interpreted
Premium Dartmouth College Study skills Attention
Based off the results from this lab the student was able to determine and have an overall better understanding of the variables that affect the rate of photosynthesis in a plant. The first variable the student tested in the lab was 30cm of light with CO2 present. The student started this trial with all 10-leaf disks and timed how many leaf disks came up every minute for 15 minutes. One minute into the trial and the student recorded that no leaf disks had yet to rise to the top of the solution. At
Premium Photosynthesis Plant Carbon dioxide
Biofuel from Sago Pith Residue (Sago Hampas) Professors: Student: Student ID: Guo-Jane‚ Tsai Yeuk-Chuen‚ Liu Norhayati Othman 10132067 May 22‚ 2013 1 Outline 1. Introduction 2. Glucose Recovery from Sago Hampas by Three Cycles Hydrolysis for Bioethanol Production. of 3. Conversion of Sago Hampas into Fermentable Sugars Performed Using Cellulolytic Enzymes. 4. Conversion of Fermentable Sugars from Sago Hampas Using UPM2 to Acetone- Butanol- Ethanol (ABE) by Clostridium acetobutylicum
Premium Starch Enzyme Glucose
I. Background of the Study: Official figures show that plastics make up around 25% of the garbage that metro manila churns out‚ while an independent survey conducted by Eco waste Coalition and Greenpeace on the composition of discards on manila bay in 2006 found that 51% were plastic bags‚19% sachets and junk food wrappers‚ 5% Styrofoam‚ 1% hard plastics‚10% rubber‚ 13% biodegradable wastes (Cayetano‚ 2008;www.senatorpiacayetano.com/psc/pressreleasedetails.php?recordID=175) Biodegradable plastics
Premium
Description To investigate the effect on caffeine on heart rate of water fleas and to understand the risk of high level consumption of caffeine to the health of the human circulatory system and nervous system. Preview Diagram 1: Chemical structure of caffeine Image source: http://ismaastricht.wikispaces.com/file/list The images above show the chemical structure of caffeine which has a chemical formula of C8H10N4O2. Caffeine was named by the International Union of Pure and Applied Chemistry
Free Caffeine
In the experiment‚ as the size of the cube decreased‚ the absorption rate increased‚ showing that the smaller cells absorbed more sodium hydroxide than bigger cells. The smaller cells were able to absorb more sodium hydroxide as they have a bigger surface area to volume ratio causing them to act more efficiently than the bigger cells. The smallest cell had a ratio of 1:12 while the biggest cell had a ratio of 1:2‚ leaving a gap of 5:12 causing the bigger cell to act less efficient in absorbing the
Premium Chemistry Concentration Solution
Investigating the Effect of Lipase Concentration on the Breakdown of Fat in Milk INTRODUCTION: Enzymes are proteins which can catalyse chemical reactions without changing themselves. The enzyme lipase breaks down the fat in dairy products such as full-cream milk for people who are lactose intolerant. Lipase acts on its specific substrate‚ lipids produces fatty acids. If enzyme concentration increases‚ random collisions between the substrates and active sites of enzyme increase due to the increasing
Premium Chemistry Enzyme Fat
Effect of Chemicals on Daphnia Heart Rate Background: In the world today‚ there are many chemicals that people use to fix or help with issues within their own bodies. Some of these chemicals may include things like caffeine‚ nicotine‚ and alcohol. These supplements can have substantial effects on other things within the body like the brain‚ liver‚ and especially the heart. For example‚ many chemicals like caffeine‚ nicotine‚ aspirin‚ and sleep aid all have effects on the body which can cause your
Premium Addiction Drug addiction Hypertension
Aim: To investigate the effect of hydrogen peroxide concentration on enzyme catalase Indroduction: Enzymes are proteins. They function as biological catalysts. They lower the energy barrier of a reaction so that the reaction can take place at body temperature. Also‚ they can speed up Metabolic reactions without being changed or used up. During a reaction‚ an enzyme molecule combines temporarily with the substrate. When the reaction is complete‚ the enzyme molecules returns to its original dorm
Premium Enzyme Oxygen Catalase