“ Food Preservatives” Submitted in Partial Fullfillment of the Requirements for the subject of Advance Chemistry IV to the Pisco Private School By: Mary Maren M. Guanlao 4th year Blaise Pascal Mary Maren M. Guanlao Mrs. Maria Dulce Bongon Adv Chemistry IV 12‚ April 2013 Food Preservatives Food is all around us and is necessary for everyday survival. Yet it has become so different from what it used to be. With the
Premium Food preservation Food Sulfur dioxide
Chemistry 2: Organic and Inorganic Chemistry Activity 1 PROPERTIES OF ORGANIC COMPOUNDS (Sugar) Rainbow Density Column Introduction As a chemical term‚ “sugar” usually refers to all carbohydrates of the general formula Cn(H 2O)n‚ an organic compound. This exercise is focus on sugar as an organic compound and its properties. Objectives: 1. To identify the properties of organic compound - sugar. 2. To observe some physical properties and changes on an organic compound during the actual conduct of
Premium Chemistry Carbohydrate Oxygen
References 1.) Lehman‚ John. Operational Organic Chemistry‚ 3rd Edition. Experiment 4 (pp. 38-45; 680-687; 644-650)‚ Prentice-Hall‚ 1999. 2.) Laboratory Reference Manual: Experiment 3. Retrieved from: http://academic.reed.edu/chemistry/alan/201_202/lab_manual/expt_salicylic_acid/background.html 3.) Lab 5: Synthesis of Salicylic Acid. Retrieved from: http://academic.evergreen.edu/curricular/whatscookin/Lab%20five%20%20methyl%20saliclate.htm 4.) Handout: Synthesis of Salicylic Acid. Retrieved
Premium Chemistry Oxygen Organic chemistry
(review) Simple 1‚2-alkenes can be described as cis- or trans- (review) More complex alkenes are best described as E- or Z- based on the Cahn-Ingold-Prelog priority rules (review) Stability: There are 3 factors that influence alkene stability: 1. Degree of substitution: more highly alkylated alkenes are more stable‚ so tetra > tri > di > mono-substituted. 2. Stereochemistry: trans > cis due to reduced steric interactions when R groups are on opposite sides of the double bond. 3. Conjugated
Premium Alkene Organic reaction Alcohol
2125 – Organic Chemistry Lab I and II GUIDELINES FOR WRITING LAB REPORTS INTRODUCTION Writing reports in organic chemistry lab may differ from the way it’s done in general chemistry. One goal of this course is to introduce you to the record keeping methods used in research labs. Such methods are designed to organize experimental data in a format similar to that required for publication in major scientific journals. Here are some important considerations that apply in research settings. 1. Your work
Premium Chemistry
wikipedia.org/wiki/Preservative http://en.wikipedia.org/w/index.php?title=Preservative&action=edit A preservative is a naturally occurring or synthetically produced substance that is added to products such as foods‚ pharmaceuticals‚ paints‚ biological samples‚ wood‚ etc. to prevent decomposition by microbial growth or by undesirable chemical changes. Preservatives can be divided into two types‚ depending on their origin. Class I preservatives refers to those preservatives which are naturally
Premium Food preservation E number
Esterification Lab Introduction Esterification is an important part of organic chemistry that has many practical applications. Esterification can be used to make polymers. In most cases‚ esters are used for scents – they often smell fruity and sweet. In general‚ an esterification reaction results from a condensation reaction between a carboxylic acid and an alcohol. The carboxylic acid group loses an OH group‚ and the alcohol loses and H. For instance‚ the reaction between methanoic acid and methanol
Premium Ester Acetic acid Carboxylic acid
C H A P T E R 5 Basic Concepts from Organic Chemistry 5.1 | INTRODUCTION The fundamental information that environmental engineers and scientists need concerning organic chemistry differs considerably from that which the organic chemist requires. This difference is due to the fact that chemists are concerned principally with the synthesis of compounds‚ whereas environmental engineers and scientists are concerned‚ in the main‚ with how the organic compounds in liquid‚ solid‚ and gaseous wastes
Premium Alcohol Carboxylic acid Organic chemistry
Partitioning of organic acid food preservatives between oil and water Olaya Iturbe Navalpotro Student of Food National Institute -DTU Technical University of Denmark Index 1. Introduction …………………………………………………………..pg. 2-4 2. Theoretical background……………………………………………….pg. 5-18 2.1. Preservatives (Sorbic acid and Benzoic acid) 2.2. Solubility and partitioning of food preservatives in food system 2.3. Measurements of the preservatives partitioning in oil-water system 2.4. Influences of
Premium Acid dissociation constant PH Carboxylic acid
soil from the site and then take several other samples from different points on the site. This ensures variety of soil to ensure that all the site is safe‚ not just a small area where you would have taken your first sample from. I will return to the lab with the samples of soil I have extracted from the site. Here I will make a solution from the samples in order to carry out the identification tests. In order to turn my soil samples
Premium Water Chemistry Soil