Introduction Metallic yarns or threads‚ in general‚ have been known for more than 3000 years. Gold and silver were hammered into extremely thin sheets‚ then cut into ribbons and worked into fabrics. These were the first ‘man made’ fibres‚ which came thousands of years before nylon or rayon. The Persians made fabulous carpets with gold thread and the Indians‚ ornamental sarees with it. The metal threads were twisted‚ doubled or wrapped around some other thread such as cotton. With the advancement
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There are four major factors that often contribute to the formation of hydrothermal copper porphyry: 1) readily available mineralizing fluid solutions that dissolve and transport metals‚ 2) openings in rocks which allow permeable flow of hydrothermal fluids and the metals that they transport in solution‚ 3) available sites within the fractured rocks which allow for deposition of the minerals from solution‚ and 4) the requisite chemical reactions that contribute to that deposition (Bateman‚ 1967)
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If you are looking for top quality alloys‚ look no further! Langley Alloys offers an extensive list of alloys to suit your specific requirements and preferences. Alloys are materials made up of two or more metals at least one of that being a metal and are utilized in a number of applications. Alloys are extremely popular in various metal manufacturing industries. With a broad range of shapes and forms made from this reliable industrial product‚ alloys became known in the feedstock and fabrication
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The Iceman was discovered on the 19th September 1991 by a German couple‚ Helmut and Erika Simons‚ who were hiking near the Austrian and Italian border in the Alps. They both had wandered slightly off trail when Erika spotted a head and shoulders sticking out of the ice‚ she first thought it was a discarded doll‚ but it was later found out to be an ancient traveler now known as the Iceman. The Iceman was quickly named Otzi‚ after the valley Otzhal that was north of his death site. At one glance‚ there
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A) As we watch the Bursatella leachii‚(sea slug)‚ we notice that the distance between them is directly proportional to the time of day. As the sun because stronger‚ and higher in the day‚ the average distance between the sea slugs greatens. As the sun becomes weaker‚ the distance between the sea slugs lessens. I believe this has to do with the reaction the Bursatella leachii has towards the sunlight. This hypothesis is based on the idea that the Bursatella leachii eat during the day. Since they
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Rocks containing copper compounds (such as copper carbonate) are called ‘copper ore’. Copper is extracted from copper ore by a series of chemical‚ physical‚ and electrochemical processes. Ores can be classed as ‘high grade’ or ‘low grade’ depending on the percentage of copper compounds (e.g. copper carbonate) they contain. After mining‚ the ore is crushed‚ roasted‚ smelted and then electrolysed to extract the copper. Suggested Equipment Boiling tube Samples of different carbonate ores‚ containing
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Never go by the appearance of any thing‚ be it a person or a thing. Simply wanting for it just by the looks of it can lead to great disaster. Most of the time‚ what we see is not the reality; the outside appearance generally hides all the truth and reality. Though we might say face is the index of the heart‚ there are so many methods to hide the face reactions. But that can be found out on constant and vigilant observation alone. The credit worthiness of so many things are definitely questionable
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Report title “Global Aluminium Pipe and Tube Market to 2018 - Market Size‚ Growth‚ and Forecasts in Nearly 60 Countries” is published at Reports and Intelligence This is a comprehensive publication that enables readers the critical perspectives to be able to evaluate the world market for aluminium pipes and tubes. The publication provides the market size‚ growth and forecasts at the global level as well as for the following countries: Argentina‚ Armenia‚ Australia‚ Austria‚ Belgium‚ Brazil‚ Bulgaria
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The first recorded use of metals being used for personal protection dates before the medieval period and is thought to have originated in Eastern Europe where natives in Asia used iron rings that had been sewn to fabrics for protection. The Asian natives called this type of armour ring mail‚ which would later be known across the world as chain mail however chain mail was not discovered by the rest of the world until the Romans started to use it and chain mail was not truly developed until the medieval
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Report on Zinc deficiencies Zinc deficiency is the inadequate amount of zinc in the body to meet its demands. Zinc is vital to the body functions such as‚ a healthy immune system and wrongdiagnosis.com states is best known for minimizing the effects of the common cold or upper respiratory infections. It can enhance the functions of the liver‚ muscles and bones. Other functions of zinc in the body are to wound heals; aid enzyme activity; DNA production and cell division. When there is an insufficient
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