point than unsaturated fats. Steroids however have a different structure and are cyclic lipids with various side groups. Cholesterol is an example of a steroid. It is important in the cell membrane as it stabilises it ensuring it does not become to like a fluid. If this were the case they would become too permeable to certain substances. However at the same time it prevents it becoming too rigid so cholesterol helps to prevent the cell membrane to maintain the correct consistency. However cholesterol
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Cell Size Control David A Guertin‚ Whitehead Institute for Biomedical Research‚ Cambridge‚ Massachusetts‚ USA David M Sabatini‚ Whitehead Institute for Biomedical Research‚ Cambridge‚ Massachusetts‚ USA Growth in biological systems is defined as the accumulation of mass‚ which leads to an increase in size. In this article‚ we discuss how cells‚ organs‚ and organisms normally control growth‚ and how deregulated growth can lead to a variety of pathological conditions. Introductory article Article
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BERCEN Training Program on On-site Inspection For the Environmental Enforcement Agencies and Inspectorates September 9-12‚ 2003 Ohrid Lake‚ Republic of Macedonia THE THERMAL POWER PLANT REK BITOLA (General information) 2 CONTENTS: page 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. Description of facilites . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .. . . . . . . . . . . . . . . . .
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Nutrition in Plants – Mineral Nutrition- essential minerals for plant growth MODULE - 2 Forms and Function of Plants and Animals 9 Notes NUTRITION IN PLANTS – MINERAL NUTRITION Sometimes you may observe that a potted plant kept in sunlight and provided with sufficient water does not grow. Its leaves look pale and weak. Plant may not even flower properly. Such a situation is an indication‚ that the plant may not be getting all that is required for normal growth and development. In most of such
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CHAPTER 3: CRYSTAL STRUCTURES & PROPERTIES ISSUES TO ADDRESS... • How do atoms assemble into solid structures? (for now‚ focus on metals) • How does the density of a material depend on its structure? • When do material properties vary with the sample (i.e.‚ part) orientation? Chapter 3- 1 ENERGY AND PACKING • Non dense‚ random packing Energy typical neighbor bond length typical neighbor bond energy • Dense‚ regular packing r Energy typical neighbor bond length
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allow cell phones to be sold without pre-market testing. The rationale‚ known as the “low power exclusion‚” distinguished cell phones from dangerous microwave ovens based on the amount of power used to push the microwaves. At that time‚ the only health effect seen from microwaves involved high power strong enough to heat human tissue. The pressure worked‚ and cell phones were exempted from any type of regulatory oversight‚ an exemption that continues today. An eager public grabbed up the cell phones
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DESCRIBE THE STRUCTURAL COMPARTMENTATION OF MAMMALIAN CELLS AND THE DIFFERING FUNCTIONS OF THESE COMPARTMENTS? Mammalian cells are eukaryotic this means that all of their cells have common components‚ membrane bound organelles which prokaryotic cells do not this is shown in figure 1. Organelles are purpose made to carry out a specific function that is necessary within a cell. Due to the specificity of both conditions and concentrations with in these organelles these are compartmentalized. Encasing
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Topic 2 – Cell membranes Reading Chapter 5 Objectives Functions of cell membranes The fluid mosaic model The lipid bilayer – phospholipids‚ glycolipids and sterols Properties of the lipid bilayer Membrane proteins – the ‘mosaic’ in the model Solute movements across membranes BIO 1140 – SLIDE 1 http://www.nikonsmallworld.com/gallery/year/2006/id/751 Functions of cell membranes – an overview Fluid mosaic model Singer & Nicolson 1972 Fluid lipid molecules in which
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BIO-GAS PLANT: SUBSTITUTE TO LPG COOKING GAS 5th February 2012 Objective: Waste is a material that no longer serves a purpose and so is thrown away. In some cases what one person discards may be re-used by somebody else. All wastes is particularly hazardous. If not carefully disposed of‚ it will have an impact on the environment‚ whether it be unsightly litter in urban streets or contaminated air‚ soil or water. But what is equally important about waste is that it is recyclable. For example‚
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CHROMATOGRAPHY OF PLANT PIGMENTS Marquez‚ Ma. Rica Paulene‚ Moises‚ Patrisha Kate‚ Policarpio‚ Jairus Paolo‚ Rolda‚ Zylene Joy Department of Biology‚ College of Science‚ University of the Philippines Baguio April 23‚ 2013 ABSTRACT The objective of this experiment was to apply the technique of paper chromatography as a method for separating individual plant pigments contained in plant tissue extracts containing pigment blends. The process of chromatography separates molecules because of the
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