3.0 Introduction The methodology involves five main steps; the collection of hair samples‚ the distribution of questionnaires‚ the washing of samples‚ the digestion of the samples‚ and the analysis of metal contents in the hair. 3.1 Materials and reagents used during the experiment The apparatus and chemicals that were used in the previously mentioned experimental steps are summarised in table 3.0. Steps Materials Reagents Collection of hair samples 1. Stainless Steel Scissors 2. Plastic bags
Premium Erlenmeyer flask Laboratory glassware Solvent
EWB-UK Workshop Guide Make your own Bio-Plastic Description A workshop focusing on the problems of plastics made by fossil fuels and a look into making your own bio-plastic. At a glance Total time: 1 hour Learning Styles: Visual‚ auditory‚ practical‚ participatory‚ teamwork Objectives: To learn about the challenges facing fossil fuel plastics and how to make your own bio-plastic Audience: Anyone Max/Min no. of participants: N/A (Dependant on amount of materials) Timetable
Premium Petroleum Starch
I believe that the reason the cell appeared smaller after being exposed to starch solution was because water molecules move out of the cell because the concentration of water inside the cell was greater than outside the cell. I believe this for a few different reasons. We were given 3 different explanations to explain why the cells appear smaller after being exposed to sugar water. These include: That the sugar molecules are not able to enter the cell‚ but the sugar molecules push on the cell membrane
Premium Starch Chemistry Water
BIO 219 Group 1 Section 66 October 19‚ 2012 The extraction of purified DNA from A. fischeri by restriction digestion using Sal I enzyme and pGEM for shotgun cloning Introduction: The ultimate goal of this experiment is to isolate the lux operon‚ a targeted piece of DNA that causes bioluminescence‚ from Aliivibrio fischeri and insert it into the DNA of Escherichia coli in order to make it glow. A. fischeri is a gram-negative bacteria which participates in a symbiotic relationship with
Premium DNA Escherichia coli Bacteria
Lab : Iodine-starch Clock Reaction Pre-lab: Before the lab was conducted‚ the concentration of the Iodate ions to be in the mixture made by dissolving specific volumes of solution A with a constant concentration and water was calculated using the dissolution formula: C1V1 = C2V2 Sample Calculation 1: Concentration of the Iodate ions: For mixture 1: C2 = C1V1/ V2 = (0.020mol/L) x (0.003L)/(0.01L) = 0.006mol/L The same calculations were used in the calculating of the
Premium Solution Time Chemistry
Digestion Self-design Practical: The effect of pH on enzyme activity Rationale Amylase is an enzyme involved in the digestion system which catalyses the breakdown of starch into sugars. It is not only present in human saliva but also in the pancreas‚ where it hydrolyses dietary starch into disaccharides and trisaccharides which are converted by other enzymes to glucose to supply the body with energy. pH has an effect on the activity of all enzymes‚ including amylase. As the pH level increases
Free PH
catalysts work best at optimum temperatures and pH’s. The temperature and pH at which the reaction occurs the quickest is the ideal condition for the enzymatic reaction. Alpha amylase converts starch into glucose and when starch is combined with I2KI indicator a dark purple solution forms. As the enzyme breaks down the starch the absorbency will decrease. The absorbency is measured through the spectrophotometer which reads the transmittance of the wavelengths that pass through the solution. In order
Premium Enzyme Chemical reaction Catalysis
Digestive system 6.1.1 explain why digestion of large food molecules is essential * Large food molecules are polymers‚ broken down into monomers in order to be absorbed into the blood * Humans eat substances by other organsims‚ many which are not suitable for human tissues therefore they must be broken down and reassembled in a form that is suitable * Many molecules in foods are too large to be absorbed by the villi in the small intestine‚ the large molecules have to be broken down
Premium Digestion Digestive system Small intestine
Polymers can be made out of starch which is composed of long chains of glucose molecules. This study focuses mainly on making biodegradable plastics‚ which is certainly safer than non-biodegradable plastics‚ from potato starch. Biodegradable plastics made from raw materials are completely reusable and can be composted easily. Potato starch contains minimal protein and fat. Potato starch is a Polymer made of long chains of glucose units joined together. Potato starch contains two polymers: Amylopectin
Premium Starch Plastic Sodium hydroxide
BIOS140 iLab #6: Digestion and Nutrition Worksheet Name: Complete the following questions and submit your report. This document contains 3 pages. The total lab is worth 35 points. 1. Observe the following model of the digestive system. Label all of the major organs. 2. There are many online tools that allow you to calculate your BMI. Use one of these tools to calculate your BMI. BMI Values Fill in Your Information Underweight Less than 18.5 Normal weight 18.5–24.9 Overweight 25–29.9 Obese
Premium Nutrition Obesity