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
Premium Chemistry Acid Oxygen
Separating a Mixture Aim: To separate the components of a mixture of sand and salt. To carry out a gravimetric analysis to calculate the percentage of both components. Equipment: * Electronic Scale | * Evaporating Basin | * Beaker | * Bunsen Burner | * Glass Stirring Rod | * Filter Funnel | * Wire Gauze Mat | * Filter Paper | * Heat Resistant Mat | * Conical Flask | * Safety Glasses | * Tripod | * Matches | Tongs | Risk Assessment:
Premium Water Distillation Liquid
Radiator fluid Coolant Radiator fluid is an essential unit of the auto since it shields the motor from the solidifying harm. At the point when the water gets changed over into ice‚ it represents an issue for the auto. Liquid catalyst is really the warmth exchange liquid which is utilized to ensure the solidifying. In both the sunlight based water radiators and the HVAC chillers it is utilized. Concoction are added to the water keeping in mind the end goal to keep the solidifying. Liquid catalyst
Premium Water Temperature Oxygen
Mincemeat Use mincemeat as a condiment or in mincemeat pie. INGREDIENTS | YIELD: 5 CUPS 2½ pounds pears 1 tart green apple 1 lemon 1 orange 1 cup golden raisins ½ cup dried cranberries or currants ½ cup light brown sugar‚ firmly packed 1 teaspoon ground cinnamon ½ teaspoon ground ginger ¼ teaspoon ground cloves ¼ teaspoon ground nutmeg Pinch salt ½ cup walnuts or pecans‚ chopped and toasted ½ cup brandy or cognac Mincemeat Seasoning Seasoning is an arbitrary thing. You’ll
Premium Water Chemistry Milk
In this experiment‚ we used methyl benzoate from the last experiment with HNO3 and H2SO4 to synthesize methyl 3-nitrobenzoate. First we added methyl benzoate to 12 mL cooled conc. Sulfuric acid in a flask. In a separate flask‚ we made a solution of 4 mL conc. Sulfuric acid and 4 mL nitric acid and then added dropwise to the solution of methyl benzoate in an ice bath on a stir plate while maintaining the temperature of reaction between 5-15 °C. After the addition was complete we took the flask out
Premium Water Chemistry Acetic acid
Separation of a Mixture Do-Your-Own-Lab What you will need to do: 1. Create a flow chart for the separation of your unknown mixture – BERFORE doing lab 2. Create data table – BEFORE doing lab 3. Do lab 4. Analyze data – calculate percent composition of your unknown mixture = 15 points = 30% 5. Write a complete lab report = 35 points = 70% 1. A flow chart is often used to illustrate the steps involved in the separation of a mixture. Flow charts are constructed BEFORE
Premium Separation process Mixture Distillation
Separation Lab Purpose: This lab was based on the separation of the components of a mixture. A mixture can be defined as a physical combination of two or more pure substances. Separation techniques are used to separate components that are not chemically combined. All of these techniques involve changes in the physical state of a chemical compound rather than chemical changes. Sea sand‚ table salt‚ and two other unknown substances will be separated using the separation techniques in order to demonstrate
Premium Separation process Mixture Distillation
Trigonella foenum-graecum‚ generally known as Fenugreek is a species that belongs to the family Fabaceae. Fenugreek has a extensive history dating around 4000 B.C and is located around the Mediterranean region and Asia. The usage of Fenugreek is expansive‚ the Egyptians consumed fenugreek for nutrition and used it to embalm their dead. The Jews combined fenugreek with boiling oil during war‚ with the belief that fenugreek would repel the Romans and make them lose their footing. African and Middle
Premium Solvent Ethanol Distillation
Chromatographic Separation of Fluorene and Fluorenone Abstract: A mixture of Fluorene (1) and Fluorenone (2) was separated by column chromatography. Chemical Equation: Fluorene (1) Fluorenone (2) Mp 114C mp 83C MW 166.22 MW 180.21 Introduction: Column chromatography was invented by Tswett in 1906 so that his study of the chemistry of chlorophyll could be facilitated. Tswett made significant advances in the method and demonstrated its applicability to the separation
Premium Chromatography Separation process Mixture
Student number: 658184 Due Date: 19th Sept 2012 Paracetamol: Preparation‚ Purification and Analysis 1.1 Introduction Paracetamol (N- (4- hydroxyphenyl) ethanamide) or acetaminophen is a widely used analgesic (pain reliever) and antipyretic (fever reducer). It is a relatively safe drug though toxicity has been observed with very high doses.1 according to the British Pharmacopeia (BP) 111 paracetamol should contain between 95.0%- 105.0% of the stated product.2 It can be synthesised by reacting 4-aminophenol
Premium Acetic acid Acetic anhydride Laboratory glassware