The antioxidant capacity of Bifurcaria bifurcata extracts from the Peniche coast was evaluated by the analysis of the total polyphenol content (TPC)‚ by the DPPH free radical scavenging activity and by Oxygen Radical Absorbance Capacity (ORAC). The results are expressed in Table 1. The methanolic fraction was more potent than the dichloromethane fraction‚ with an EC50 of 58.82µg/mL (50.65 – 68.31)‚ which was very similar with the standards‚ ascorbic acid and BHT‚ that exhibited an EC50 of 22.43µg/mL
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Date:23.11.12 In this practical‚ you will be assessed on Design‚ Data Processing & Presentation and Conclusion & Evaluation – Read the checklist of the criteria for guidance. Introduction: It is Saturday afternoon. You brew yourself a cup of coffee and are just about to pour cold milk into the coffee. The doorbell rings and you realize immediately that your friend needs your help for a few minutes this afternoon. If you want to have your coffee as warm as possible after you helped your
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Science in the Big City: Exploring Career Opportunities in the Natural and Physical Sciences New York City May 13-18‚ 2014 Students in the Natural Sciences at the University of Houston-Downtown are generally accomplished and motivated students with strong interests in science. However‚ students typically have a very limited perception of the science careers available to them outside of medicine. To educate students as to the array of potential careers available in the sciences (not medicine)
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Cover page Course Code & Name: Engineering Science Title: Oscillations of a pendulum with a yielding support Instructor: Mr. Imran khan Cohort: Full Time Student Name & ID: Kyle Rigsby 68891 Date: 11/19/2014 Title page Oscillations of a pendulum with a yielding support Abstract Intent: The goal was to investigate the time taken for the pendulum to oscillate for a time period. Results: Table of Content Objectives i) Tie the end of a thread to a hole in the end of
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DCP CE lab report for thermal physics Jeff Raw data collection: temperature (K)±1K | length (cm)±0.05cm | diameter(cm) ±0.05cm | volume(cm^3) | uncertainty for volume | 342 | 7.3 | 0.28 | 0.449271 | 0.163531 | 338 | 7.0 | 0.28 | 0.430808 | 0.156937 | 336 | 6.7 | 0.28 | 0.412345 | 0.150343 | 334 | 6.3 | 0.28 | 0.387727 | 0.141551 | 331 | 6.1 | 0.28 | 0.375418 | 0.137155 | 329 | 5.9 | 0.28 | 0.36311 | 0.132759 | 326 | 5.5 | 0.28 | 0.338492 | 0.123967 | 325 | 5.4 |
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The moment of inertia is a measure of an object’s resistance to changes in its rotation. It must be very specific to the chosen axis of rotation. Also‚ it is specific to the mass and shape of the object‚ including the way that is mass is distributed in the object. Moment of inertia is usually quantified in kgm2. An object’s where the mass is concentrated very close to the center of axis of rotation will be easier to spin than an object of identical mass with the mass concentrated far from the axis
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shown in Fig. 1 the main fixed scale in the vernier caliper has 1 mm gradations while th sliding scale (vernier scale) has 0.05 mm gradations. The smallest division of vernier scale is called the least count of vernier caliper. It may be different for different vernier calipers (and other measuring instruments). In order to measure length‚ put an object between the jaws and close the jaws gently. Fix the object with the fixing screw. (Fig
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Experiment 5: Relative Density Patrick Erlo Reyes‚ Joseph Winfred Sajul‚ La Reyna Roshele Salenga‚ Luisito Jeremiah Samonte‚ Christine Bernadette Sanchez Department of Biology College of Science‚ University of Santo Tomas España‚ Manila‚ Philippines Abstract This experiment is concerned with the densities of objects. The first activity is determining the density of a cylinder through displacement method and by weighing. The second activity is finding the density of a bone and determining it whether
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Laboratory simulation: Refraction Name:______SummerAbdullah______________________________ Class:______12G________ Learning goals Familiarize with simulations of physical processes. Log raw data and plot graphs. Partially familiarize with the scientific method (phenomenon‚ prediction‚ experiment‚ and conclusion). Derive the dependence of the angle of refraction on the angle of incidence and the index of refraction. Simulation used “Refraction of light” (“bending-light_el.jar”): http://phet
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1. Shell and Tube Heat Exchanger – Working Principle The shell and tube heat exchanger comprises of two major things as its name state "Shell and Tube". The shell is a major vassel with quantities of tube inside it (Jalmood‚ n.d). Shell and tube heat exchangers are helpful for pressurized application. Heat is exchanged between the liquid in the tubes and the liquid inside the shell. Configuration of the tube pack is such that‚ all the section sides of the tube could be joined with a typical header
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