him find a safe and reliable artificial hair dye. Schueller eagerly volunteered. As Ruth Brandon explained in Ugly Beauty‚ - “He discovered that hair dyes were based upon four groups of substances: anilines‚ silver nitrate‚ pyrogallic acid and lead acetate. The first group was the most dangerous. Aniline derivatives are very soluble‚ going through many intermediate stages before forming the lacquers which give the hair its new
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1. DHL DHL provides international express‚ air and ocean freight‚ road and rail transportation‚ contract logistics and international mail services to its customers. The company’s name DHL is derived from the last names of the then three budding entrepreneurs‚ Adrian Dalsey‚ Larry Hillblom and Robert Lynn who founded the company. 1. IBM IBM’s full company name is International Business Machines Corporation. It is a multinational technology and consulting corporation. The company was founded
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KEY CONCEPTS CULTURE IS COMMUNICATION In physics today‚ so far as we know‚ the galaxies that one studies are all controlled by the same laws. This is not entirely true of the worlds created by humans. Each cultural world operates according to its own internal dynamic‚ its own prin ciples‚ and its own laws-written and unwritten. Even time and space are unique to each culture. There are‚ however‚ some common threads that run through ;:111 cultures. It is possible to say that the world
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38 Sujet : Subject Référence : Reference EUROPEAN REGULATION – REACH Pages Pages CE9 Version : Revision Q Date: 09/12/10 Etabli par : V.NGUYEN Established by Validé par : Approved by C. De Meerschman RÉFÉRENCE NORMATIVE NORMES REFERENCE CHAMPS D’APPLICATION APPLICATION FIELD OBJECTIFS PURPOSE Regulation 1907 / 2006 of the 18th December 2006 All the products European frame for the REACH Regulation WARNING: The user is responsible for checking any
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(a) (b) (c) (d) 5) Which of the following is vinyl halide? (a) CH2CL2 (b) CH2= CH-Cl (c) CH = C-Cl (d) 6) What is B in R-OH + PX5 R-X +B+ HX? (a) HPOX3 (b) H3PO3 (c) POX3 (d) H3PO2 7) Which catalyst is used in preparation of bromobenzene by bromination of benzene? (a)FeBr3 (b) HBr (c) AlBr3 (d) Br2 8) By which name the reaction CH3 - Br + Ag- F CH3F + AgBr is known? (a) Grignard (b) Wurtz (c) Fitting (d) Swartz 9) What are nucleophilic reagents
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What is the Difference between Flammable and Combustible Liquids? Put simply‚ flammable and combustible liquids are liquids that can burn. The real difference lies within their flash point range‚ or lowest temperature at which vapours of the material will ignite when supplied with an ignition source. Flammable and combustible liquids are utilised in most workplaces‚ from manufacturing to retail and service entities. To ensure the safety of property‚ people‚ and the environment‚ both flammable
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dalimss EV.S PROJECT Disease caused by the Environmental exposure MADE BY- [Type the author name] [Year] Environmental Diseases In epidemiology‚ environmental disease is disease caused by environmental factors that are not transmitted genetically or by infection. Apart from the true monogenic genetic disorders‚ environmental diseases may determine the development of disease in those genetically predisposed to a particular condition. Stress‚ physical and mental abuse‚ diet‚ exposure
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1.1 INTRODUCTION Leather is a durable and flexible material created by the tanning of animal rawhide and skin often cattle hide. It can be produced through manufacturing processes ranging from cottage industry to heavy industry. Leather comes from tanneries in various shapes and sizes depending on its intended use and the animal which it came from one thing to always remember about leather- it is an animal’s skin that has been processed into finished leather‚ not a synthetic material. Because
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2(g) what is the order? For the reaction 2NH 3(g) ¾¾¾¾ 5. 6. 7. 8. 9. 10. What do you mean by selectivity of a catalyst? Give the chemical composition of Copper matte. Name the noble gas that is radioactive? Write the general equation of the preparation of alkyl chlorides from alcohols using SOCl2. What are acetals? Name the water insoluble component of the starch? Part-B II. Answer any five of the following each questions carries two marks 11. 12. 13. 14. 15. 5 X 2=10 An element having atomic
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Upton Sinclair wrote the novel The Jungle along with several other politically-charged novels. Primarily motivated by politics‚ Sinclair wrote novels encouraging socialism and condemning capitalism. The literary period‚ the historical events‚ his family background‚ his job experience‚ and his political opinion inspired Sinclair’s desire to write The Jungle. The bold novel incited bold reactions of both support and criticism. Despite the opinions of the critics‚ Sinclair’s political outcry is
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