Aspirin originally was derived by boiling the bark of the white willow tree. Although the salicin in willow bark has analgesic properties, purified salicylic acid was bitter and irritating when taken orally. Salicylic acid was neutralized with sodium to produce sodium salicylate, which was better-tasting but still irritated the stomach. Salicylic acid could be modified to produce phenylsalicylate, which was better tasting and less irritating, but released the toxic substance phenol when metabolized. By law, all drugs sold in the United States must meet purity standards set by the Food and Drug Administration, so all aspirin is essentially the same.
ABTS is mixed with potassium persulphate to generate the free radical and Nitrites were produced when sodium nitoprusside were mixed with distilled water. The three herbal tea extracts were also able to reduce the blue color of ABTS solution into neutral color with their scavenging activity (51.63 to 81.62%) for R canina , (28.42 to 66.91) T pratense and( 43.85 to77.82%) of M alba. R canina in nitric oxide assay also showed strong radical scavenging activity to reduce the production of nitrates as compared to other two extracts ranging from R canina (48.09 to 80.03 %) T pratense (35.45 to 68.70%) and (38.25 to 72.39±%) for M alba .Lipid peroxidation is an mechanism to damage cellular injury and used as indicator of oxidative stress(Esterbaur et al., 1991).Poly unsaturated fatty acids are damaged by free radicals and create a process of chain reaction which is divided into three phases namely initiation propagation and finally termination (Suresh and Annam,2013)..In general the examined extract of R canina expressed strong antioxidant activity to stop damage of lipids. The largest inhibitory activity again was exhibited by Aqueous extract of R canina with IC50 values(62.65µg/ml) followed by M alba (92.10µg/ml) and least inhibitory activity was showed by T pratense (119.51µg/ml).BHT was used as positive control in all the in
It protects bones, boosts the immune system, keeps the mind young, and aids in weight loss. If people do not like a certain flavor there are many others to choose from, each containing a different substance that will lead to a health advantage. As more discoveries are made about how tea helps health it may begin being used as a medicine. For starters, what is tea? Tea is one of the most ancient and popular beverages consumed around the world.
Coffee and tea are similar in a few ways: a majority of people enjoy drinking them, they have health benefits, and they are made from parts of trees. There are a few different types of coffee and tea. The main types of coffee are single-estate, single-origin, and blends. Single-estate is when the coffee comes from one growing estate and is able to boast of consistent standards and flavor. Single-origin is when the bean of beans is from
Magic marker inks are often mixtures of several compounds. Paper chromatography is a common method of separating various components of a mixture. After separation, you can observe the different colors that make up a particular color of magic marker ink. You can also calculate a ratio Rf, which compares how far each compound traveled to how far each solvent (substance that dissolves another substance) traveled during the experiment. Rf = Ds/Df Ds = Distance traveled by the compound Df = Distance traveled by the solvent Materials: coffee filter, tape, isopropyl alcohol (rubbing alcohol), water, 3 different color magic markers (not permanent); 3 identical tall, narrow drinking glasses; metric ruler, 3 pencils Pre-lab Questions: List one extensive and one intensive property of marker ink.
b. tap water-homogeneous c. blood-heterogeneous d. house paint-homogeneous 3.In a solution, which component is considered the solvent? Which is the solute? The primary ingredient in a solution is called the solvent, and the other ingredients are the solutes and are said to be dissolved in the solvent. 4.Name the solvent and solute(s) in the following solutions a. carbonated water b. apple juice c. coffee d. salt water 5.Does a solution have to involve a liquid? Explain your answer.
Comparing the Solubility of Salt, Sugar, and Powdered Kool-Aid in Water Which substance is more soluble in water: salt, sugar, or Kool-Aid? If salt, sugar, and Kool-Aid are all added to the same amount of water until the mixture is saturated, then we predict that the Kool-Aid will be the most soluble, because it is designed to dissolve in water and the particles are more fine-grained. Manipulated Variables type of solute added (salt, sugar, Kool-Aid) Responding Variable how many teaspoons of solute it takes for water to become saturated Controlled Variables size of beaker volume of water size of teaspoon (5 ml) room temperature water temperature Materials 5 ml teaspoon stir stick beaker 200 ml of cold tap water granulated
GOOD DAY PEOPLE MY NAME IS LATOYA MCCORMACK AND Today I'd like to give you some of the facts about caffeine and its effects on your body. It may not cause you to change your coffee consumption or your “Red Bull” intake but at least you'll be better informed about what you are putting into your body. Now I'm going to talk about the beneficial effects of caffeine, the negative effects and discuss what are considered safe levels of caffeine consumption. Caffeine does help you wake up and feel more alert, it has been shown to increase attention spans and elevates mood. This is a beneficial effect for people who are driving long distances and for people who are doing tedious work.
TEA EXTRACTION Esthephanie Peralta October, 7 CHEM 2583-04 The purpose of this lab is to extract caffeine from a tea bag. Structures Compounds used for the experiment Reference The Merck Index Online structures from Chemsketch Caffeine Calcium Chloride CaCl2 CCl2H2 M.P. 230C Sodium Carbonate Dichloromethane CNa2O3 C8H10N4O2 Data Table 1.1 |Density | Weighs (g) | |Side arm flask (empty) + nipples |38.206g | |Side arm flask + residue |38.230g | |Clean finger |10.218g | |Finger + product |10.219g | Table 1.2 | |Caffeine Content (Mg ) | |Tea, black fermented |40-75 mg | |Tea recovered |24.0 mg | Experimental Procedure 1. In a 50ml beaker add 2g of Sodium Carbonate and add 15ml of H2O. Grab second beaker and add 10 ml of water.
These include herbs, nutritional substances, and a certain diet. Herbal remedies can be drank in teas or bought in a capsule form. Some familiar herbs believed to help ADHD are alfalfa, catnip, ginger root, hops, kelp, lavender, rosemary, and ginseng. Unfortunately while these herbs do have a calming affect they are hard to control and can only help for a short time. (Natural treatments for ADHD, 251-256) Some people choose to use nutritional substances to manage their ADHD.