IMPACTS OF OZONE Introduction Ozone is a gas that occurs naturally in our atmosphere. Most of it is concentrated in the ozone layer[->0]‚ a region located in the stratosphere several miles above the surface of the Earth. Although ozone represents only a small fraction of the gas present in the atmosphere‚ it plays a vital role by shielding humans and other life from harmful ultraviolet light from the Sun. Human activities in the last several decades have produced chemicals‚ such as chlorofluorocarbons
Premium Ozone Oxygen Ozone depletion
Column and thin layer chromatography of plant pigments CHEMISTRY 201L EXPT 04 PAGE 01 - 12 Noel Angelo P. Kalacas*‚ Hanna Mae Laluces‚ Ina Bianca Lanuza Department of Chemistry‚ College of Science *Corresponding author; e-mail: knight_BeNcH66@yahoo.com Abstract Chromatography is a powerful technique for separating and/or identifying the components in a mixture. There are different types of chromatography and each has its own strengths and weaknesses. In this experiment‚ pigments of the
Free Chromatography Thin layer chromatography
flavors of fruit and flowers is the ester. Although the ester composes most of the scents it is not totally responsible for all scents. Beside the ester functional group an essential oil can also possess complex mixtures of hydrocarbons‚ alcohols‚ and carbonyl groups. These compounds usually belong to one of two groups of natural products called terpenes or phenylpropanoids. Investigation of the essential oils in the nineteenth century found that many of the pleasant odors we obtain from nature contained
Premium Distillation Water
Individual Discussion Spectroscopy Dry Lab Lab Section M5 - Group 6 January 24‚ 2015 Discussion In this laboratory assignment‚ the spectroscopy data and molecular formula were given for 3 unknowns. An effort was made to conclusively identify these unknown samples using only the spectroscopy data‚ specifically 1H-NMR‚ 13C-NMR‚ and IR spectroscopy. Although mass spectrometry was given for the samples as well‚ its use was suggested only for confirmation‚ not identification‚ of the unknowns
Premium Chemistry Chemical substance Chemical compound
BIO 2924 – Unit III Microbial Metabolism Chapter 8 and 9.3 I. Enzymes: - Chapter 8 A. Definition B. Characteristics C. Structure 1. Simple Enzymes 2. Conjugated Enzymes D. Nomenclature of Enzymes E. Classification of Enzymes F. Enzyme--Substrate Reactions G. Levels of Structure of Enzymes H. Conditions Affecting Enzyme Activity I. Location and Regularity of Enzyme Action 1. Exoenzymes 2. Endoenzymes 3. Constitutive Enzymes 4. Inducible Enzymes J. Regulation of Enzymatic Activity
Premium Adenosine triphosphate Cellular respiration Metabolism
fault) have been very useful parameters in determining the cause of fault acids and moisture. The hydrolytic effect is to cleave the glucosidic bond‚ yielding free glucose. Cellulose is susceptible to oxidation‚ which leads to the formation of carbonyl and carboxyl acid groups. Secondary reactions can eventually occur‚ to molecular chain scission. leading The degradation of oil results in high acid content‚ which exacerbates the chemical deterioration of the paper insulation even further. Consequently
Premium Transformer Carbon dioxide
MATERIALS REVOLUTION UNIT REVISION BOOKLET Vikram Mahal How To Use this Booklet: This booklet has been created by addressing all the points on the OCR B salters specification for the section‚ what’s in medicine. I advise reading through the Book‚ highlighting or underlining words written in ALL CAPITALS. I also suggest making a spider diagram or mind map to summarise key points and help the information here stick in your mind. You could also draw your own images by points on this
Premium Amine Carboxylic acid Amino acid
THE STUDY OF CHLOROPHYLL CONTENT IN VARIOUS PLANTS A Project Report Submitted by SANDEEP SETHI In partial fulfillment of the CBSE GRADE XII IN BIOLOGY AT 2015-16 CERTIFICATE This is to certify that Sandeep Sethi of grade XII‚ ST. XAVIER INTERNATIONAL SCHOOL‚ BHUBANESWAR with Registeration Number _______________________ has satisfactorily completed the project in Biology on STUDY OF CHLOROPHYLL CONTENT IN FIVE DIFFERENT SPECIES OF PLANTS‚ in partial fulfillment of the requirements
Free Photosynthesis Chlorophyll
CHCl3 H H 1H-NMR 12 O R C OH 11 R 10 O C H 9 R 8 7 6 H 5 CH2F 4 3 CH2Ar CH2NR2 CH2S 2 1 C H C C C-CH2-C C 0! TMS H CH2Cl CH2Br CH2I CHEMICAL SHIFTS CH2O C C-H C O CH2 C-CH3 carbonyl aromatic; alkene CH2NO2 alkane 13C-NMR CH2 200 150 alkyne 100 50 C-O‚N‚X 0! TMS CHM 2211-U01 SAMPLE EXAM I‚ Page 3 MULTIPLE CHOICE QUESTIONS: Answer each of the following questions by bubbling in the correct response
Premium Carboxylic acid Alcohol Infrared spectroscopy
Running head: Organic Chemistry Tamanna Ashraf Palm Beach State College Principle of Chemistry Ceravolo‚ Joseph MW 11:00am-12:15pm February 6th‚ 2011 We all are living in a science world. Everything has some kind of reaction going on in our living area. It is just we do not get to see or realize that where n how we having our life much easier than it used to be. In these writing assignments‚ the topic is about the organic chemistry. In organic chemistry‚ we all have different kinds of compounds
Premium Oxygen Carbon Chemical bond