of the air sacs in the lungs and in chronic bronchitis the damage is to the lining in the airways. Both conditions are generally caused by long term exposure to lung irritants‚ the most common of which is cigarette smoke. Other typical lung irritants contributing to COPD are air pollution‚ chemical fumes‚ and dust. The lung irritants cause inflammation; when inflammation is chronic‚ it causes scar tissue. Scar tissue in the airways decreases elasticity‚ air sacs are destroyed‚ walls of airways become
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Toxicology-May be harmful if swallowed or inhaled. May act as an irritant. Personal Protection- Do not breathe dust. Wear safety glasses if handling powdered zinc. Magnesium‚ Mg(s) Stability-Stable. Reacts violently with halogens‚ chlorinated solvents‚ chloromethane. Air and moisture sensitive. Incompatible with acids‚ acid chlorides‚ strong oxidizing agents. Highly flammable. Toxicology-Harmful if swallowed or inhaled. Severe irritant. Vesicant. Personal Protection-Safety glasses. Lead‚ Pb(s)
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Immediate medical attention is needed for severe itchiness and rashes with pus and swelling. Irritant Contact Dermatitis What it looks like: Other than the allergic reaction rashes‚ a more common type of contact dermatitis is the irritant contact dermatitis. At first glance‚ this may be confused with hives since it shares most of its characteristics. It starts off as a red rash and bumps accompanied by itchy‚ dry
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Grignard Synthesis of Tirphenylmethanol David Szuminsky Organic Chemistry Lab II Shaopeng Zhang Monday 1PM 2/10/14 & 2/24/14 - Abstract A sample of triphenylmethanol was prepared using Grignard synthesis techniques. Reflux was used in order to speed up the reaction and the final product was purified using recrystallization methods. The percent recovery and percent yield were 80.46% and 47.526%‚ respectively. A melting point range of 85-87oC was obtained from
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Comparing the enthalpy changes of combustion of different alcohols Aim In this experiment I will investigate the enthalpy changes of combustion. In particular I will be investigating the enthalpy change of combustion for different alcohols. I hope to investigate some of the homologous series alcohols‚ as well as a few structural isomers of these alcohols. Background & theory Enthalpy cannot be measured. What we can actually measure is the enthalpy change from the reactants to the products.
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ever a danger to the Nazi regime and for years they were seen as nothing more than a youthful irritant – youths going through that phase in their lives where rebellion (as they perceived it) was the order of the day. hey also offered a way of life outside of the strangulating Nazi regime. Between 1936 and September 1939‚ the Nazi authorities saw the Edelweiss Pirates as little more than a small-scale irritant. However‚ attitudes changed during World War Two when the authorities believed that the Edelweiss
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dermatitis that can be caused by work. The first is called irritant contact dermatitis. This condition arises from working with substances that physically damage the skin when they came into contact with it. Among the chemicals that can cause this type of damage are many in common use such as acids and alkalis and organic solvents can dissolve the skin’s protective layer of oils‚ leaving it dry‚ cracked and vulnerable. Some strong irritants can cause immediate damage‚ resulting in serious skin burns
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inexpensive way. And most of the population today is experiencing inflammation in some parts of their external body. Inflammation is part of the complex biological response of vascular tissues to harmful stimuli‚ such as pathogens‚ damaged cells‚ or irritants. Inflammation is a protective attempt by the organism to remove the injurious stimuli and to initiate the healing process. Researchers did their very best to seek ways or methods to alleviate the inflammation happening to certain individuals and
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Sulfa Drugs: Preparation of Sulfanilamide Introduction The purpose of this experiment is to prepare sulfanilamide from p-Acetamidobenzenesulfonyl chloride. This will be done using reflux‚ vacuum filtration‚ and melting point determination. Experiment Scheme6 Figure 1. Reaction equation.6 A hot water bath was prepared in a fume hood using a 250-mL beaker. 2.5 g of p-acetamidobenzenesulfonyl chloride was placed into a 50 mL Erlenmeyer flask and 11 mL of dilute ammonium hydroxide solution
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October 6‚ 2013 Table of Chemicals: Chemical Hazards Mol. Wt. Density Grams Moles Acetone Flammable‚ Irritant 58.08 g mol−1 0.791 g cm−3 2.0 g 0.0344 Hexane Flammable‚ Irritant‚ Dangerous to Environment 86.18 g mol−1 .6548 g mL−1 9.0 g 0.1044 Fluorene Very toxic to aquatic life with long lasting effects 166.223 g/mol 1.202 g/mL 0.3 g 0.00180 Fluorenone Irritant 180.20 g mol−1 1.13 g/cm3 0.3 g 0.00166 Alumina none 101.96 g mol−1 .95–4.1 g/cm3 1.25g 0.01225 Nitrogen
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