to cause an increase in cancer to people who use this product‚ with an emphasis on women with breast cancer. PEG compounds usually have small amounts of a substance called ethylene oxide. According to experimental results reported in the National Toxicology Program ’s Eighth Annual Report on Carcinogens‚ ethylene oxide increases the incidences of uterine and breast cancers and of leukemia and brain cancer. ` Another ingredient used in cosmetics is Methylchloroisothiazolinone‚ which is a natural
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Designation: C 114 – 07 Standard Test Methods for Chemical Analysis of Hydraulic Cement1 This standard is issued under the fixed designation C 114; the number immediately following the designation indicates the year of original adoption or‚ in the case of revision‚ the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope* 1.1 These test methods cover
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its ore: [pic] Because both reduction and oxidation are going on side-by-side‚ this is known as a redox reaction. Oxidising and reducing agents An oxidising agent is substance which oxidises something else. In the above example‚ the iron(III) oxide is the oxidising agent. A reducing agent reduces something else. In the equation‚ the carbon monoxide is the reducing agent. • Oxidising agents give oxygen to another substance. • Reducing agents remove oxygen from another substance. Oxidation
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per wafer UMC‚ http://www.umc.com.tw/english/process/a.asp MOSFET fabrication Metal-oxide-semiconductor field-effect transistor (MOSFET) Technology size: Distance between drain & source Robert F. Pierret‚ Field Effect Devices‚ p.72 MOSFET fabrication http://www.ecse.rpi.edu/~schubert/Course-ECSE-6290%20SDM-2/1%20MOSFET-2%20Fabrication.pdf Top view Field oxide Source Drain Channel length Safety Safety Issues • Variety of acids and bases
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into the corresponding oxides and carbon dioxide. The temperature of decomposition depends upon the activity of the metal; that is to say‚ the more active the metal‚ the more stable is the carbonate. Thus‚ the carbonates of sodium and potassium are stable at the highest temperature of a Bunsen burner flame‚ whereas the carbonates of silver and copper are easily decomposed. In this experiment copper (ii) carbonate will be decomposed at a high temperature‚ forming copper (ii) oxide and carbon dioxide:
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solution to adipic acid using an excess of strong nitric acid. This report deals with KA oil/cyclohexanol production by various routes‚ followed by the common step of nitric acid oxidation. KA oil production from cyclohexane by the cobalt catalyst and boric acid air oxidation routes is reviewed. Production of KA oil from phenol is also covered‚ as is the Asahi process for cyclohexanol production from benzene via cyclohexene. Appropriately adjusted nitric acid oxidation is appended to each of these
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hollow block Many people used pure cement hollow block in making buildings but this research aims to make a more durable and fire retardant hollow block in making infrastructures. Background: The glass contains lime‚ magnesium oxide‚ and aluminum oxide that add more durability. Barium also increases the refractive index and low dispersion that make it endure shock. Plastics contain stabilizing additives that include fire retardants to lower the flammability of a material. These 2 combined
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1. 2. Sodium cloride Magnesium oxide Calcium bromide Aluminum sulphide Nickle (III) chloride (indicates charge) 3. CaBr2 4. Al3+ Ni3+ S2Cl- Al2S3 5. NiCl3 6. Sodium thiosulphate (complex ion) Na2S2O3 7. Aluminum silicate (complex ion) Al2(SiO3)3 (must bracket a complex ion with a subscript) 8. Ammonium phosphate NH4+ PO43- (NH4)3PO4 (bracket comples ion with a subscript) 9. Barium oxide Ba2+ O2- Ba2O2 BaO (written
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ore‚ and • Purification of the metal. It is also called ‘Refining’. Stages of extraction of metals: After the concentration of the ore is done‚ there are two main steps or stages in extractive metallurgy. They are: Conversion of the ore into Metal oxide or metal compound. Extraction of crude metal from metal from metal compound. Concentration of ores: Removal of the unwanted materials (e.g.‚ sand‚ clays‚ etc.) from the ore is known as concentration‚ dressing or benefaction. It involves several steps
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What is the total number of atoms in (NH4)2SO4? (1) 10 (2) 11 (3) 14 (4) 15 22. Write the correct formula for the following binary ionic compounds. (a) Lithium fluoride LiF (b) Calcium oxide CaO (c) Aluminum nitride AlN (d) Beryllium chloride BeCl2 (e) Potassium iodide KI (f) Aluminum oxide Al2O3 23. Write the correct formula for the following binary molecular compounds. (a) Carbon monoxide CO (b) Boron tribromide BBr3 (c) Sulfur hexafluoride SF6 (d) Carbon dioxide
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