Gia Hoang Lab 1: Effect of pH on a Food Preservative 9-1-2011 Purpose The purpose of this lab was to determine if a new substance forms when sodium benzoate is placed in a simulated stomach acid. Theory Benzoic acid can be found in a wide variety of plants. It is used as a natural preservative in many foods. Sodium benzoate‚ the salt of benzoic acid‚ has become a more popular choice as a food preservative because it is more soluble in water than benzoic acid. Many food items found today
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Benzoic Acid and Benzoates in Food‚ Drinks and Medicines Benzoic acid and benzoates are common additives to food‚ drinks‚ medicines and cosmetics‚ and they also occur naturally in many plants. They are useful chemicals in manufactured products because they kill or inhibit both bacteria and fungi and can act as preservatives. Benzoic acid and benzoates are considered to be safe chemicals for humans when they’re used in small quantities‚ but there are at least two situations in which even small
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How do Food Preservatives affect the growth of Microorganism? | By: Aya Zbedah | | December 15‚ 2008 | | Mrs. Hafell 5th Period Biology | 2008-2009 | | Abstract How Food Preservatives affect the growth of Microorganisms? Aya Zbedah Ballard High School The purpose of this project is to see which preservative will either slow down the growth of bacteria or speed up the growth using the three most common preservatives: sugar‚ salt and‚ vinegar. Humans usually have a problem keeping their
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taste for longer as well as to meet the requirements of food manufactures many chemical compound have been discovered and developed as ways to preserve food and extend their life for longer. With the increasing of new technologies‚ transportation and a growing population‚ food processing which requires the use of preservatives‚ ensures the extension of shelf life of many foods and beverages. There are many different types of food preservatives that are added to our daily diet. Butylated hydroxyanisole
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Abstract: The Preservative effect of brine at different concentrations on lettuce at tropical ambient temperature was examined. The effect of various concentrations of salt solutions on leaf surface and edge browning‚ texture‚ and colour were observed for five days. The experiment was laid out in a Complete Randomized Design (CRD) and each treatment repeated in triplicates including a control. Sensory qualities were examined by six panelists using a 5-point hedonic scale ranking. Results indicated
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Title Page A COMPARISON FOR THE BETTER FISH PRESERVATIVE BETWEEN SUGAR AND SALT IN PARTIAL FULFILLMENT OF THE REQUIREMENTS IN CHEMISTRY III FOR SCHOOL YEAR 2011 – 2012 Grace Christian Rubillos Rosemarie Dianne P. Japlos Izzadyl Louise Blateria Vincent Anthony Elizaga James Emmanuel Lumapas RESEARCHERS Rosaminee B. Sanchez ADVISER Acknowledgement The researchers would like to express their gratitude to Mrs. Marcelina Rubillos‚ Grace’s great-grandmother‚ who has contributed valuable information
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solution of cane or beet sugar until sufficient water has been evaporated to give a mixture which will set to a gel on cooling and which contains 32-34% water. Gel formation is dependent on the presence in the fruit of the carbohydrate pectin‚ which at a pH of 3.2 - 3.4 and in the presence of a high concentration of sugar‚ has the property of forming a viscous semi-solid. During jam boiling‚ all micro-organisms are destroyed within the product‚ and if it is filled hot into clean receptacles which are
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Perception of ESEP students on the Effects Food Preservatives Engineering and Science Education Project‚ Camarines Sur National High School Penafrancia Avenue‚ Naga City Genieline Magalona Jedidah Palero Abegail Gamayot Ma. Froilan Patricio Abstract This study aims to know the perception of the ESEP student in Camarines Sur National High school concerning the effects of food preservatives in the food they eat. In gathering data 30 ESEP students in any grade level was given a survey questioner
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This experiment shows the effects of changing the pH level has on Catalase. As predicted‚ the farther away the pH levels got from the optimum pH (7.2)‚ the lower the reaction rate. At a pH of 7.2‚ the foam of the reaction measures 6cm. At a ph of 3 it measures 2.5 cm‚ at a pH of 5 it measures 2.75 cm‚ at ph 9 it measures 2.3 and at 11cm it measures 2cm. pH measures the hydrogen ion concentration of a substrate. By changing the pH of the catalase‚ the enzyme was denatured. Denaturing is the result
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lab is to determine the pH level of common household products. Introduction Liquids are either acidic‚ basic‚ or neutral. We are able to figure out which one it is based on properties‚ along with the pH. Acids taste sour‚ and bases taste bitter. Using the pH scale‚ you are able to know how strong of an acid or base a liquid is. High concentration of [H+] ions means that the liquid has a low pH. Therefore a liquid with a low concentration of [H+] would have a high pH. A pH of less than 7 represents
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