adding 1mL of Folin-Ciocalteau Phenol Reagent to 39mL of distilled water. Solution A: Buffered copper solution Prepared by adding the following to 80mL of distilled water in a 100mL volumetric flask: 1 mL glacial acetic acid‚ 23.2 g NaCl‚ 3.2 g sodium acetate The solution is well mixed to dissolve all components‚ and 0.5g of CuSO4 is added‚ mixed again‚ the pH adjusted to 4.8 with the addition of NaOH solution‚ mixed again‚ and distilled water is added up to 100-mL mark. The final pH is adjusted to 4.8
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Carbon and Its Compounds Carbon: Introduction Atomic Number: 6 Electronic Configuration: 2‚ 4. Valence electrons: 4 Property: Non-metal Abundance:- Carbon is the 4th most abundant substance in universe and 15th most abundant substance in the earth’s crust. Compounds having carbon atoms among the components are known as carbon compounds. Previously‚ carbon compounds could only be obtained from a living source; hence they are also known as organic compounds. Bonding In Carbon:- The Covalent
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Cell Respiration & Photosynthesis BIO STUDY GUIDE (Ch. 9.1-9.5‚ 10.1-10.3) I) CELLULAR RESPIRATION A) Catabolic Pathways A.1) Fermentation: partial degradation of sugar that occurs w/o oxygen A.2) Cellular Respiration: oxygen is used A.3) Redox Reactions (Oxidation-Reduction that exchanges electrons) Oxidation: loss of electrons (energy must be added) Reduction: addition of electrons. (-) charged electrons added to atom reduce amount of (+) charge of that atom A.4) Stepwise Energy Harvest
Free Photosynthesis Cellular respiration Adenosine triphosphate
in 1910. By the mid of 1920s Rayon fibre was being used increasingly by the textile industry‚ not because of better quality but because of its low price. In 1931 American chemist Wallace Carothers first discovered nylon fibre. Unlike rayon and acetate which were derived from plant cellulose‚ nylon was produced completely from synthetic polymers. At that time he was working for Dupont. Dupont started commercial production of nylon in 1939.Although the first nylon product was toothbrush‚ it was not
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Despite the loss of collagen as we age‚ the network appears more dense due its organization. Luckily now their are many ingredients that help with the signs of ageing. Including : Retinol or vitamin A and its derivatives (retinyl palmitate or retinyl acetate)‚ Ascorbic Acid and its derivatives‚ Tocopherol and its derivatives‚ Antioxidants‚ Bioflavonoids‚ Hydroxy acids (AHAs and BHAs)‚ Hyaluronic acid‚ Pigment Brighteners and Sunscreens. Our skin will age no matter what
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Rubber Additives Market worth 1.7 MT by 2019 The report "Rubber Additives Market by Type (Accelerators‚ Antidegradants‚ Blowing Agents‚ Ethylene-Vinyl Acetate‚ Adhesive Agents‚ and Others)‚ by Application (Tire and Non-tire) - Global Trends & Forecasts to 2019"‚ defines and segments the rubber additives market with an analysis and forecast of the rubber additives market size by value. The rubber additives market size by value is projected to grow at a CAGR of 5.9% between 2014 and 2019. Browse 72
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Atrazine (1-chloro-3-ethylamino-5-isopropylamino-2‚ 4‚ 6-triazine‚ CAS: 1912-24-9) was purchased from Dr. Ehrenstorfer GmbH (97.7%‚ Germany). Ethyl acetate (99.8%‚ ANPEL Scientific Instrument (Shanghai) Co.‚ Ltd.) was used as solvent for standard solutions. Acetonitrile used as HPLC eluent was purchased from ANPEL Scientific Instrument (Shanghai) Co.‚ Ltd.‚ KH2PO4·12H2O‚ K2HPO4·2H2O‚ dichloromethane and other chemical reagents used in cultivated media were purchased from Sinopharm Chemical Reagent
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Titration test Alfredo Verzo III We have been provided with two samples of vinegar‚ one removed from a restaurant and one removed from a take-away. Trading Standards suspect these two establishments of watering down the vinegar. They need evidence that the samples contain less acid than the standard vinegar sample provided. What is the purpose of this? I’m a worker in the Trading Standards which carries out tests to see if restaurants and takeaways are watering down the vinegar. We will
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(between 35 and 37 degrees Celsius). The second step is to select the appropriate medium for the specified microbe. In this experiment we will use a liquid broth medium for both cultures. The first is MRS culture medium‚ which contains polysorbate‚ acetate‚ magnesium and manganese to promote growth for lactobacilli. The second is nutrient medium‚ which is the standard growth medium for most microbes. It contains heat stable digestive products of proteins called peptones and beef broth to promote bacterial
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Background of the Study Tea is created by using the leaves of a plant known as Camellis sinensis. This plant is native to mainland China‚ South and Southeast Asia‚ but it is today cultivated across the world in tropical and subtropical regions. It is an evergreen shrub or small tree that is usually trimmed to below 2 m (6.6 ft) when cultivated for its leaves. It has a strong taproot. The flowers are yellow-white‚ 2.5-4cm (0.98-1.6 in) in diameter‚ with 7 to 8 petals. Tea-drinking can be traced back
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