The Toxic Trio Let’s face it‚ when a woman arrives at a nail salon‚ the first thing she thinks about is the color of polish she is choosing or how excited she is to pamper herself. The last thing on her mind are the toxins that are in the actual nail polish. Little does she know‚ there are plenty of chemical compounds that are in each nail polish bottle‚ three of which are very toxic. They are formaldehyde‚ toluene‚ and dibutyl pthlate (DBP)-also known as the "toxic trio." These three toxins are
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musks ’ in a random selection of perfume brands. Greenpeace commissioned a laboratory to test 36 brands of eau de toilette and eau de parfum for levels of the two chemical groups.The results confirm that some synthetic musks‚ most notably the polycyclic musks galaxolide (HHCB) and tonalide (AHTN)‚ and some phthalates‚ especially diethyl phthalate (DEP)‚ are widely used by the perfume industry.This suggests that regular use of perfumes could substantially contribute to individuals’ daily exposure
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Sorption Evaluation of Waste Tire Rubber for Spill Oil Recovery and to optimize the Sorption with respect to Particle Size and Temperature. Project Advisor Miss Nida Qamar Group Members Ahmad Shakeel (Group Leader) (2009-PE-34) Mohsin Ali Khan (2009-PE-52) Asif Ali (2009-PE-56) Ali Sher (2008-PPE-46) Department of Polymer
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Pregnant women that smoke cigarettes on a daily basis can greatly harm their fetus. The Tobacco smoke in cigarettes greatly reduces fetal growth through the presence of nicotine‚ carbon monoxide‚ hydrogen cyanide‚ cadmium and various other aromatic hydrocarbons‚ but the two most dangerous chemicals that are found in cigarettes are nicotine and carbon monoxide. Nicotine causes the babies heart rate to speed up‚ reduces placental vascularisation‚ constricts the placental arteries‚ and thickens the endothelium
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What Is Lung Cancer? Lung cancer is the uncontrolled growth of abnormal cells that start off in one or both lungs; usually in the cells that line the air passages. The abnormal cells do not develop into healthy lung tissue; they divide rapidly and form tumours. As tumours become larger and more numerous‚ they undermine the lung’s ability to provide the bloodstream with oxygen. Tumours that remain in one place and do not appear to spread are known as “benign tumours”. Malignant tumours‚ the
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Håvard Devold Oil and gas production handbook An introduction to oil and gas production ISBN 978-82-997886-1-8 PREFACE This handbook has been compiled for readers with an interest in the oil and gas production industry. It is an overview of the main processes and equipment. When we searched for a suitable introduction to be used for new engineers‚ I discovered that much of the equipment is described in standards‚ equipment manuals and project documentation. But little material was
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AIR POLLUTION The major pollution caused by factories or industrials’ activities is air pollution. According to the Engineers’ Joint Council “Air Pollution and Its Control”‚ air pollution means the presence in the outdoor atmosphere of one or more contaminants‚ such as dust‚ fumes‚ gas‚ mist‚ odour‚ smoke or vapour in quantities of characteristics and of duration‚ such as to be injurious to human‚ plant or animal life or to property or which unreasonably interfaces with the comfortable enjoyment
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GRADE 11 CHEMISTRY (30S) Final Practice Examination Answer Key GRADE 11 CHEMISTRY (30S) Final Practice Examination Answer Key IInstructions The final examination will be weighted as follows Modules 1–3 Modules 4–6 The format of the examination will be as follows: Part A: Fill-in-the-Blanks Part B: Multiple Choice Part C: Short Answer Total Marks Include units with all answers as required. Useful Information You will need the following in order to complete this examination: n n n n 15–20% 80–85%
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bioaugmentation. For bioremediation to be effective‚ microorganism must enzymatically attack the pollutants and converts them in to non toxic form. n Bioremediation has its limitation‚ some contaminants such as chlorinated organic compound and aromatic hydrocarbon are resistant to microbial attack .bioremediation techniques are typically more economical than traditional method. FACTORS OF BIOREMEDIATION These factors include the existence of a microbial population capable of
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Chemical T ests for Unknowns Chemical tests have been developed as a means of identifying what functional groups are present in an unknown compound. Since IR and NMR spectroscopy has been developed‚ they are no longer critical to unknown analysis‚ but they can still be useful for confirming what you have determined by spectroscopy. Some of them look cool too! In order for a chemical reaction to work as a chemical test‚ it must 1) create a visible result (a color change‚ a precipitate‚ etc)
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