DETERMINATION OF SAPONIFICATION AND IODINE NUMBERS OF SOME LIPIDS A.L. ASCANO1 C.V. OPONDA1 1INSTITUTE OF BIOLOGY UNIVERSITY OF THE PHILIPPINES‚ DILIMAN‚ QUEZON CITY‚ PHILIPPINES DATE PERFORMED: FEBRUARY 19‚ 2013 INSTRUCTOR’S NAME: FRANCESCA N. BELTRAN _____________________________________________________________________________________ ABSTRACT _____________________________________________________________________________________ INTRODUCTION Lipids are long aliphatic hydrocarbon chains which are
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What are the three most abundant lipids in the body? What is a triglyceride and where is it found? What is its exact chemical structure? What is the difference between saturated and unsaturated free fatty acids? What is a trans fat? Where can free fatty acids be found in the body? What is the unique structure of a phospholipid? Where are phospholipids found and what are their most important characteristics? What is a steroid fat? What is its structure? What are the most common steroid fats
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AN INVESTIGATION TO FIND THE EFFECT OF BILE SALTS OF ON THE DIGESTION OF LIPIDS I have investigated that if there is an effect of bile salts on the digestion of lipids in the milk. When lipids are broken down in to fatty acids and glycerol (see below)‚ the acid lowers the pH of the mixture. To help me determine and measure the digestion of lipids‚ a pH indicator phenolphthalein has been used to measure the pH of the mixtures. The pH indicator will change the colour from pink to either white (if
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Testing for reducing sugars‚ non-reducing sugars‚ starch‚ lipids and proteins in unknown substances: Our aim: was to find out which substances from our five samples have reducing sugars present to determine what they may be for example; they could be monosacchrides or disaccharides. This was carried out by using Benedict’s test. To find out which substances from our five samples were non-reducing sugars‚ since some disaccharides are reducing sugars and this would be carried out by using Benedict’s
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from Anacarduim occidentale as a Lipid Source of Oreochromis nil. Source: Thea Angelai G. Paez Keesha Dela Peña Lady Fatima W. Garcia Abstract: Lipids are one of the molecules used by fishes for their physiological functions and cellular processes. These lipids have many uses in the lives of fishes‚ not only in fishes but also in other activities of other organisms. Oreochromis niloticus (tilapia) is one of the most common fish that contains lipids in their muscle or tissues. Anacadium
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structured It is composed of phospholipids‚ proteins‚ and carbohydrates‚ which are arranged in a fluid mosaic structure. The phospholipids are arranged in a “bilayer”. With their hydrophilic (water attracting) phosphate heads facing outwards and their hydrophobic (water fearing) tails facing in towards the middle of the bilayer. The hydrophobic layer acts as a barrier to all but the smallest molecules and effectively isolating the two sides of the membranes. Some membranes contain
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which cell membranes‚ are based on lipid bilayer. Phospholipids contain two ends‚ a head and a tail. The head end is hydrophilic which means it is water loving‚ polar‚ and is attracted to water molecules. The tail end is hydrophobic which is created by carbon and hydrogen atoms called fatty acid chains‚ they are water fearing‚ nonpolar‚ and do not mix with water molecules. Cell membranes include cholesterol in the phospholipid bilayer. Cholesterol is a lipid carried in the blood; it gives the cell
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selectively permeable1‚ creates a barrier between the cell and its environment and maintains homeostasis2. These functions are why the cell membrane is a vital cell structure. One of the most important parts of it is the phospholipid bilayer. The phospholipid bilayer contains many phospholipids (diagram below) and is approximately five nanometers (1nm=1/1‚000‚000‚000m) thick. Each phospholipid is composed of a non-polar (hydrophobic) region of two fatty acids pointing inwards and a polar (hydrophilic)
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function properly. 3. Describe and explain the fluid mosaic model of the cell surface membrane. In the fluid mosaic model‚ protein and lipid components move rapidly in the plane of the membrane. Membrane proteins are dispersed and individually inserted into the phospholipid bilayer‚ with only their hydrophilic regions protruding far enough from the bilayer to be exposed to water. This maximizes contact of hydrophilic regions of proteins and phospholipid with water while providing hydrophobic parts
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Red blood cell From Wikipedia‚ the free encyclopedia [pic] Human red blood cells (6-8μm) Red blood cells (also referred to as erythrocytes) are the most common type of blood cell and the vertebrateorganism’s principal means of delivering oxygen (O2) to the body tissues via the blood flow through thecirculatory system. They take up oxygen in the lungs or gills and release it while squeezing through the body’scapillaries. These cells’ cytoplasm is rich in hemoglobin‚ an iron-containing biomolecule that
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