Edison’s ’phonograph. Since the development of optical fibres ’photo phones’ and ’phonographs’ are no longer used or needed. Optical fibres have many advantages; they enable the sound messages to carry for 50km without any need for a repeater unlike other optical communication systems‚ which need repeaters at 1km intervals. Optical fibres have replaced other methods of communication for many reasons‚ some listed below. *Capacity Optical fibres can carry signals with much less energy than copper
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materials may to be found at a crime scene investigation such as blood and body fluids‚ fingerprints‚ footwear marks‚ all of which could provide intelligence information‚ to named suspects. Additional‚ evidential material in the form of paint‚ hairs‚ fibres‚ tool-marks and glass can also afford corroborative evidence to link suspect with crime scene or eliminate the person from a police enquiries. The selection of some evaluation evidence depends on numbers of factors. The nature of the possible offense;
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Xylem or wood (2) Phloem or bast (3) Cambium. They have different kinds of tissue elements. (1) Xylem or wood This lies towards the centre and is composed of (i) Trachae or vessels (ii) sone tracheids‚ (iii) a number of wood fibres and (iv) a small patch of wood parenchyma. Vessels are of various kinds such as spiral‚ annular‚ scalariform‚ and reticulate and pitted (with simple or bordered pits). Some tracheids also lie associated with the vessels. Wood fibres and wood parenchymatous cells
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[1]: Bast or phloem fibres (often designated as soft fibres) are enclosed in the inner bast tissue or bark of the stem of the dicotyledonous plants‚ helping to hold the plant erect. the cellular and woody tissues‚ i.e. the plant stalks are rotted away from the fibres. Examples of the most common of these are flax‚ hemp and jute. Retting is employed to free the fibers from hemp Ramie Jute Flax Leaf fibres Leaf fibres (often designated as hard fibres) run hawser-like
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Fiber crops are field crops grown for their fibers‚ which are traditionally used to make paper‚ cloth‚ or rope. The fibers may be chemically modified‚ like in viscose or cellophane. Botanically‚ the fibers harvested from many of these plants are bast fibers; the fibers come from the phloem tissue of the plant. The other fiber crop fibers are seed padding‚ leaf fiber‚ or other
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❖ Jute is a long‚ soft‚ shiny vegetable fibre that can be spun into coarse‚ strong threads. It is produced from plants in the genus Corchorus‚ which was once classified with the family Tiliaceae‚ more recently with Malvaceae‚ and has now been reclassified as belonging to the family Sparrmanniaceae. "Jute" is name of the plant or fiber that is use to make burlap‚ Hessian or gunny clothes. ❖ Jute is one of the most affordable natural fibres and is second only to cotton in amount produced
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Eco-friendly processing of Jute & Allied Fibres Paper presented to INTERNATIONAL JUTE STUDY GROUP (IJSG) DHAKA‚ BANGLADESH By Dr. S. K. Chakrabarti INDIAN JUTE INDUSTRIES’ RESEARCH ASSOCIATION 17‚ TARATALA ROAD‚ KOLKATA 700088 INDIAN JUTE INDUSTRIES’ RESEARCH ASSOCIATION ECO-FRIENDLY PROCESSING OF JUTE & ALLIED FIBRES Dr. S. K. Chakrabarti Indian Jute Industries’ Research Association (IJIRA) 17 Taratola Road‚ Kolkata- 700088 Abstract: In the present scenario‚ the
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Saint Paul University Quezon City Banana Fiber Clothing A Feasibility Study Presented to the Faculty of the Tourism Department Saint Paul University Quezon City In Partial Fulfilment of the Requirements for the Degree of Bachelor of Science in Tourism Management by: Besmonte‚ Armi Jen Sto. Domingo‚ Allen Marie Villarama‚ Katrina May April 2013 Introduction Background of the Study Bananas are known
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farhana ahmed ASSIGNMENT ON JUTE IN BANGLADES COURSE CODE:GED 205 COURSE TITLE:INTRODUCTION TO SUSTAINABLE DEVELOPMENT SUBMITTED TO MD.SHAFIQUL ISLAM ASSISTANT PROFESSOR SUBMIITE BY NAME:JUNAIDUR RAHMAN KHAN ID:1120111111 DATE:17-12-2012 Abstract As worldwide negative image of Bangladesh hurts its social and economical development as it is expected‚ therefore branding would be one of
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Feasibility studies about Coco fiber used in making Bricks CHAPTER 1: THE PROBLEM AND ITS BACKGROUND Background of the Study The coconut palm‚ Cocos nucifera‚ is a member of the family Arecaceae (palm family). It is the only accepted species in the genus Cocos. In this research we use Coconut coir to make bricks. Coconut Coir is a natural fiber extracted from the husk of coconut. Technically‚ coir is the fibrous material found between the hard‚ internal shell and the
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