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These and metals
These metals found little practical use until the introduction of crucible steel around 300 BC.
These electronegative elements are strongly associated with metal-bearing minerals, where they have formed water-insoluble compounds with the metals in the ores.
These metals can form useful silicides when deposited onto silicon.
These compounds can be reduced using either calcium or lithium metals in the following reactions:
These metals form an extremely thin layer of oxidized metal on the surface.
These metals are used in applications where corrosion resistance is important.
These other metals and their alloys can be cold-worked, or melted in simple pottery kilns and cast in molds ; but smelted iron requires hot-working and can be melted only in specially designed furnaces.
These are all modern, and there was no noticeable exploitation of metals or minerals prior to the modern era.
These range from biomaterials, to ceramics, to metals, to textile reinforced materials.
These metals are therefore relatively volatile, and are avoided in ultra-high vacuum systems.
These new military applications coincided with a population explosion throughout Europe in the 11th-14th centuries which increased the demand for precious metals in order to fill a currency shortage.
These heavy elements are termed metals by astronomers and the portion of heavy elements is the metallicity.
These tombs, which date to the Early Dynastic IIIa period ( approximately in the 25th or 24th century BC ), contained immense amounts of luxury items made out of precious metals, and semi-precious stones all of which would have had to been imported from long distances ( Iran, Afghanistan, India, Asia Minor, the Persian Gulf ).
These processes use a welding power supply to create and maintain an electric arc between an electrode and the base material to melt metals at the welding point.
These include fluctuating configurations of defects in metals, fluctuating occupancies of traps in semiconductors, and fluctuating domain structures in magnetic materials.
These orbitals are known as Landau levels, and at weak magnetic fields, their existence gives rise to many interesting " quantum oscillations " such as the Shubnikov – de Haas oscillations and the de Haas – van Alphen effect ( which is often used to map the Fermi surface of metals ).
These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone.
These include iron ore ( magnetite or lodestone ), cobalt and nickel, as well as the rare earth metals gadolinium and dysprosium ( when at a very low temperature ).
These organic acids are much less reactive with metals than are strong mineral acids like hydrochloric acid ( HCl ) or mixtures of HCl and hydrofluoric acid ( HF ).
These stars converted the pristine hydrogen, helium, and lithium formed by the Big Bang into heavier elements, such as carbon, oxygen, and metals.
These elements have also been referred to as earth metals and as triels.
These metals are all quite malleable, and humans ' initial development of hammering techniques was undoubtedly applied to these metals.
These include such metals as zinc, magnesium, and cadmium.

These and were
These were the ones Keith sought out -- the loners, the ones who killed for the joy of it, like himself.
These were the last words he ever uttered.
These two were going to be easy pickins.
These performances were being staged at historical monuments throughout Europe.
These were Oneida Indians.
These conceptions and the manner in which they were transposed into poetry or engendered by poetic form are intrinsic to western life from the time of Aeschylus to that of Shakespeare.
These basic ideas concerning the nature of religion were, Adams believed, some of the major keys to the understanding of history and the movement of society.
These were his public academic activities, domi forisque, in the college and in the university.
These early experiments were evidently not altogether satisfying to Patchen.
These people were not talking much about it, but you, a foreigner, sensed their apprehension and disappointment.
These public efforts were rare because Mr. Rayburn normally did his counseling, persuading and educating long before an issue reached its test on the House floor.
These microfossils indicate the swamp was `` formed during the Lower Cretaceous period when dinosaurs were at their heyday and when the first flowering plants were just appearing.
These were heroes nine feet tall to him ''.
These little songs, however, were sweet nothings from the heart, tender memories of his childhood, little melodies that anyone could hum and that would make one want to weep.
These were the ships of His Majesty's Navy, herding the hulks of the East Indies merchants and the yachts and ketches of the loyalists.
These trumps were more touching than they were anything else, and seemed to imply that the nights were long, her children ungrateful, and her marriage bewilderingly threadbare.
These were selected carefully and included not only detailed clinical information but adequate pathology of value for research and educational purposes.
These amendments to the Vocational Rehabilitation Act were designed to help provide for more specialized rehabilitation facilities, for more sheltered and `` half-way '' workshops, for greater numbers of adequately trained personnel, for more comprehensive services to individuals ( particularly to the homebound and the blind ), and for other administrative improvements to increase the program's overall effectiveness.
These plans, like Du Pont's, contained provisions for passing the vote on Du Pont's General Motors shares on to the ultimate stockholders of Du Pont, Christiana, and Delaware, except that officers and directors of the three companies, their spouses, and other people living in their households, as well as other specified persons, were to be totally disenfranchised.
These curves were derived by an analysis of extensive skywave measurement data.
These were educated men, who, as Mr. Justice Holmes was fond of saying, formed their inductions out of experience under the burden of responsibility.
These boys acknowledged an introduction to anybody by gently pressing one of his hands in both of theirs, while they gazed, misty-eyed with care, into the eyes of the person they were meeting.

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