investigated the effect different salt concentrations have on the enzyme activity. Serial dilutions were performed to prepare a lactase solution as well as twenty percent‚ fifteen percent‚ and five percent concentrations of NaCl. Three different treatments of ortho-nitro-phenyl-galactoside‚ lactase‚ and perspective salt concentrations were prepared in cuvettes where the reaction would be observed and recorded from a spectrophotometer. Larger concentrations of salt adversely effect the reaction activity
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Research question “To what extend is one ecosystem more diverse than other one?” Hypothesis If ecosystem has more number of species and organisms within those species‚ it will have higher biodiversity. Justification of hypothesis According to formula for Simpson`s diversity index‚ D = N (N-1) / Σ n (n-1)‚ where N is total number of organisms‚ while n is sum of individuals within a specie‚ we can see that sum of all individuals and total number of organisms of particular species affect the biodiversity
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Experiment 5 – Percent Water in a Hydrated Salt Pre-Lab Hints 1. Note definition of deliquescent in the introduction. 2. See side notes for part A‚ as well as part 1 of Technique 15C (pg 27). 3. Mass of water in sample is the mass lost by heating (initial minus final). Water % is 100 times the g of water divided by the initial g of hydrate sample. 4. a. See step A1 in the procedure. b. A hot sample on the balance creates air currents and causes thermal expansion‚ both of which decrease
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Salt is a substance that prevents from osmosis taking place which leads to the seed not receiving any water uptake so it is not able to grow at all since there is no energy provided for its growth. Is a seed able to become tolerant of salt? Quinoa is known to have salt tolerance‚ but it is still shown in this experiment that the quinoa surrounded by distilled water still had much more growth than the quinoa placed with a high concentration of salt. The results were clear that
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Lab Report Procedure 6.1: Perform Benedict’s test for reducing sugars. Introduction: Benedict’s tests allows for the detection of the presence of reducing sugars. All monosaccharides are reducing sugars since all of them have active carbonyl group. Some disaccharides that are exposed to a carbonyl group are also reducing sugars but less reactive than monosaccharides. By mixing the sugar solution with Benedict’s solution and heating them‚ a redox reaction will occur. The copper (II) sulphate
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Lab Report Density Name: Period: Problem How do you calculate Density? What units did you use for volume‚ mass‚ and density? When the cubes are placed in water which one will sink 1st? What is the ranking of the cubes lightest (1) to heaviest (10)? Is it true that the cube with the most mass will have the most density? Hypothesis I think the 1st cube was aluminum I think the 2nd cube was steel I think the 3rd cube was brass I think the 4th cube was copper I think the 5th
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ABSTRACT On the past two weeks‚ I have done an experiment on hydrostatics‚ or is also known as fluid statics (fluid at rest) within the fluid mechanics field of study. This condition explains that in a stable condition‚ the fluid is at rest. The use of fluid in doing work is known as hydraulics‚ and the science of fluid in motion is known as fluid dynamics. INTRODUCTION The natural nature of fluids are they cannot remain stationary under the application of shear stress. However‚ fluid
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This lab experiment investigates the effect of listening to different types of music on one’s pulse. The experiment relates the circulatory system to the pulse as it measures how quickly the heart contracts and releases blood. Pulse is measured in beats per minute (bpm). One’s pulse is loudest near the heart‚ because there is more pressure closer to the heart. In contrast‚ one’s pulse is quieter the further away it is measured from the heart‚ because there is less pressure the further the distance
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chemistry lab report : reaction of alcohol CHEMISTRY LAB REPORT SK026 SEMESTER 2 SESSION 2011/2012 TITLE :REACTION OF ALCOHOL DATE : NAME : MATRIC NO : PARTNER : PRACTICUM : SUPERVISOR : Title : Reaction Of Alcohol Objectives : 1. To classify alcohol 2. To study the chemical properties of alcohols Introduction: Alcohol is a class of organic compound containing hydroxyl group‚ OH as the
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Title: Observation of Macroscopic Chemical Changes‚ Alice Kimbrell‚ Chemistry 101-DS01:74589‚ 5/31/2013. Purpose: In this lab‚ I will observe macroscopic changes that occur when mixing together certain chemicals and household cleaners. The mixing of the chemicals provided with each other and with acid/base indicators demonstrates how matter can change‚ and how chemistry can be seen with the naked eye. By mixing household cleaners with an acid/base indicator I hope to demonstrate how these
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