INTRODUCTION COSMETICS What is a cosmetic? The literal meaning of cosmetics as defined by The Oxford English Dictionary is “Having power to adorn‚ embellish or beautify (esp. the complexion)”. What we learn from this definition is that: cosmetics are superficial rather than therapeutic agents. Their work is to beautify‚ promote attractiveness‚ cleanse‚ or alter the appearance without affecting the body’s structure. Cosmetics include a huge range of products such as Lotions Skin creams Face
Premium Human skin color Cosmetics Human skin
Chemistry 1: PROBLEM SET SY 2012/2013 CLASS #: _______________ NAME_________________________________________ SECTION: ______________________ Stoichiometry II - Mole Calculations/ Limiting and Excess Reagent – Lecture Notes 1. Given the balanced equation N2(g) + 3H2(g) 2NH3(g) How many moles of ammonia are produced when 0.60 mol of nitrogen reacts with hydrogen? 2. Given the equation: SiO2 + HF SiF4 + H2O a. Calculate the number of moles HF that would completely react with 2.5 moles of
Premium Chlorine Sodium Stoichiometry
Aloe (Aloe vera) is a major and traditional medicinal plant under family of Liliaceae. Aloe consumed externally and internally as well. It is used externally to treat several skin burn conditions‚ sunburn and poison oak‚ infections‚ and eczema. It is confirm that juice from Aloe vera ease pain and decrease inflammation. It has antiseptic and antibiotic properties in treating cuts and abrasions. Aloe juice used to treat people with ulcerative colitis‚ an inflammatory bowel disease. Moreover it acts
Premium Amino acid Inflammation Prostaglandin
Enzymes and their importance in plants and animals (25 marks) Enzymes are biological catalysts‚ which accelerate the speed of chemical reactions in the body without being used up or changed in the process. Animals and plants contain enzymes which help break down fats‚ carbohydrates and proteins into smaller molecules the cells can use to get energy and carry out the processes that allow the plant or animal to survive. Without enzymes‚ most physiological processes would not take place. Hundreds of
Premium Photosynthesis Enzyme Glucose
pH MEASUREMENT AND BUFFER PREPARATION ! ! 2A—Pharmacy‚ Faculty of Pharmacy‚ University of Santo Tomas Canare‚ Ann Shery; Caraos‚ Aeraille Diane; Carillo‚ Pauline Mari; Carreon‚ Leslie Ann; Co‚ Alexandra Kay !! !! ABSTRACT. The regulation of internal pH is a physiological function of major importance for all organisms. The quantity pH is intended to be a measure of the activity of hydrogen ions in solution. Buffers‚ on the other hand‚ are solutions containing a substantial concentration of both
Free PH PH indicator
Am J Obstet Gyneco. 2009; 200:329‚ e321–328. 12. Pantoja M‚ Medeiros T‚ Baccarin MC‚ Morais SS‚ Bahamondes L‚ Fernandes AM. Variations in body mass index of users of depot-medroxyprogesterone acetate as a contraceptive. Contraception. 2010; 81:107–111. [PubMed: 20103446] 13. Burke GL‚ Bild DE‚ Hilner JE‚ Folsom AR‚ Wagenknecht LE‚ Sidney S. Differences in weight gain in relation to race‚ gender‚ age and education in young adults: the CARDIA Study
Premium Pregnancy Birth control Childbirth
HPTLC and 0.05g of the crystallised product above was placed into a sample vial which contained 1cm3 of ethyl acetate solvent shaken and dissolved. This sample of synthesised solution and a further two other solutions of pure paracetamol and 4- aminophenol solution sample were separately loaded by capillary action in different positions. These were then placed in a jar containing ethyl acetate (2cm3) and the results were visualized under the UV
Premium Acetic acid Acetic anhydride Laboratory glassware
base. Buffers usually consist of a weak acid and its conjugate base‚ in relatively equal and "large" quantities. A buffer system can be made by mixing a soluble compound that contains the conjugate base with a solution of the acid such as sodium acetate with acetic acid or ammonia with ammonium chloride. The buffer capacity refers to the maximum amount of either strong acid or strong base that can be added before a significant change in the pH will occur. This is simply a matter of stoichiometry
Free PH Buffer solution Acid dissociation constant
Jacobsen’s Method of Epoxidation of an Alkene | | Abstract Various types of reactions were completed to first create and then use Jacobsen’s catalyst in the asymmetric epoxidation of an unknown alkene with bleach in the laboratory. The chiral epoxide synthesized was then characterized with GC/MS and NMR. With this information the unknown alkene was able to be identified as 4-chlorostyrene. Introduction Organisms have evolved with mechanisms that use specific enantiomers of molecules
Premium Acetic acid Stoichiometry Solvent
that the composition of the substrate which has the highest cellulose pellicle yield was using the ratio of CSL medium to coconut water at was 4:1(v/v). To the above medium‚ supplements consisted of sucrose (5%)‚ corn steep liquor (4%)‚ and ammonium acetate (3.75%). In fact‚ 7% sucrose gave the best yield; followed by 5% sucrose but the contribution of adding 7% sucrose is lower than that of 5%. The pH of medium was adjusted to initial pH 4.0‚ and incubated at 30℃ for 10 days; highest yield of cellulose
Premium Acetic acid Coconut Acid