• From Ancient Alchemy Recipes to Modern Chemistry - Numericana

    From alchemical recipes and other rules of thumb to modern chemistry. History of black powder. Inks and pigments. Gold chemistry.

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  • TubeNet - The Site for Tube and Pipe Industry

    The common site for tube and pipe industries - Tube mills,cut-off, bending, end forming, branching, welding and tube suppliers around the world

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  • Coal - Wikipedia

    Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements; chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is formed if dead plant matter decays into peat and over millions of years the heat and pressure of deep burial converts the peat into coal.

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  • How To Choose A Carbon Monoxide Detector - Which?

    A good quality carbon monoxide detector will sniff out the danger and let you know when there’s carbon monoxide in the air. But there are plenty of ineffective alarms on sale – in fact, a fifth of all of the models we’ve tested were so unreliable and dangerous that we’ve labelled them Don’t Buys.

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  • Coffee Terms - Brewing and Espresso

    The reddish brown froth covering the surface of a high quality cup of espresso. Crema is very important in making a good espresso. The presence of crema is the main …

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  • Graphite - Wikipedia

    Graphite (/ ˈ ɡ r æ f aɪ t /), archaically referred to as plumbago, is a crystalline form of the element carbon with its atoms arranged in a hexagonal structure.It occurs naturally in this form and is the most stable form of carbon under standard conditions.Under high pressures and temperatures it converts to diamond.. Graphite is used in pencils and lubricants.

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  • Welding Safety Precautions, Tips and Techniques

    Natural ventilation is considered sufficient for welding or cutting operations where the conditions listed above are not present. Figure 2-5 is an illustration of a welding booth equipped with mechanical ventilation sufficient for one welder.. g.

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  • Adsorption of Methylene Blue onto activated carbon ...

    Adsorption technique for the treatment of dye containing aqueous solution using low cost activated carbon has been investigated. The activated carbon (PAC2) was produced by the steam activation of New Zealand bituminous coal on an industrial scale.

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  • Ed's Red Penetrating Oil - Global Software, Inc.

    Ed's Red Recipe Penetrating Oil for the masses. December 15, 1995 . Editor's Note: Ed Harris is a well known, knowledgeable gun writer with years of experience working for Ruger and the US government.

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  • Boiler Tube Ferrules | Blasch Precision Ceramics

    Boiler Tube Ferrules. Reliable Oxytron™ Silicon Carbide wear resistant and high temperature ferrules are designed to be inserted in heat exchangers; both in the inlet and outlet ends.

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  • Boiler reviews - Which?

    Which? recommends the best new boilers. Discover the most reliable gas and oil boilers, including heat-only and combi boilers, using our boiler reviews.

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  • Coal - Chemistry Encyclopedia - structure, water, uses ...

    of dead vegetation began to accumulate, becoming tightly packed and compressed, and gave rise to different kinds of coal, each with a different carbon concentration: anthracite, bituminous coal, subbituminous coal, and lignite.

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