water. The bigger the number is‚ the higher the viscosity is and the harder it dissolves in water; the soluble glass with low module‚ there are many kinds of crystal composition and the cohesive force is poor‚ and when the module number improves‚ the colloid component increases and the cohesive force rises. Soluble glass solution can be mixed with water in any proportion. Different amount of water will lead to solutions of different density and viscosity. For the soluble glass solutions with the same
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Conditions section. Glass backed TLC plates will be created with the following three spots: Ketone Standard/Co-Spot/Crude Reaction Mixture. Prepare the TLC plate while the reaction is being set up. To the initial solution of 4-tert-butylcyclohexane in methanol‚ before adding the reducing solution‚ insert a TLC capillary. Use this sample as your ketone standard. Do NOT stop the reaction before checking the progress by TLC. If the reaction is not complete‚ add another portion of the reducing solution.
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nitration of Acetanilide i.e. how hydrogen on a carbon chain is replaced with a nitro group. Reagents and Chemicals: • Acetanilide (5g) • Glacial acetic acid (5mL) • Concentrated sulphuric acid (10mL &1.5mL) • Concentrated Nitric acid (2.0mL) • Methanol (30-50mL) Modification to experimental procedure: The experimental procedure was conducted as per instructions from the chemistry 220 manual. We were told to add 5grams of Acetanilide but due to time constraints I had added 5.05grams. Whilst preparing
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ABSTRACT: LCZ696 (sacubitril/valsartan‚ EntrestoTM) is a novel therapy proposed for heart failure treatment. It was recently approved by the FDA in order to decrease the mortality rate and hospitalization for patients with chronic heart failure. So this study is considered as the first report to investigate the fluorimetric behavior of sacubitril in addition to pursuing all the different conditions which may affect its fluorescence. Numerous conditions were studied such as studying the effects of
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all FeCr is produced in submerged arc furnaces‚ while the role of competitive technologies like DC is limited. In all furnaces fluxes are used to optimize the slag composition. Vital characteristics are smelting point‚ electric conductivity and viscosity. The main components of FeCr slag are SiO2‚ Al2O3 and MgO. Additionally it consists of Cr-‚ Fe-oxides and CaO. Granulated slag and/or classified slag products are produced depending on the production process. The slag products are mainly marketed
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speed is much greater than the speed of sound. Aerodynamicists disagree over the precise definition of hypersonic flow; minimum Mach numbers for hypersonic flow range from 3 to 12. Most aerodynamicists use numbers between 5 and 8. The influence of viscosity in the flow dictates a third classification. Some problems involve only negligible viscous effects on the solution‚
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: 1) R wave T wave S wave P wave Q wave 6. All of the following aid in venous return of blood to heart EXCEPT (Points : 1) the skeletal muscle pump. the respiratory pump. blood viscosity. venoconstriction venous valves. 7. Which type of blood vessel plays a key role in regulating blood flow into capillaries? (Points : 1) arteries arterioles venules veins aorta 8. Which
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applied to the plate and settings the speed range from 0.3 to 60 rpm or 0.5 to 100 rpm with 10s between each two successive speeds. when the torque was within 10–100% (the acceptable range) rheological data (the viscometer were shear stress and viscosity at different shear rate values) were recorded (Azhari et al.‚ 2016). Studying the rheological behavior using the rheological data was by fitting the power law model: τ=Kγ^n Equ (2) Where τ is the shear stress‚ γ is the rate of shear‚ K is the consistency
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[-q2)] /(Dr2) = negative‚ thus an attraction To compare solvents‚ put the values in the equation: In H2O: FH = (k[+q1] [-q2)] /(DH r2) In methanol: FM = (k[+q1] [-q2)] /(DM r2) Comparison: FM /FH = DH / DM = 78 / 32 ≈ 2.5 Note: Measuring is always a comparison... Conclusion: These ions attract each other 2.5 X better in methanol Thus they separate
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Friedel-Crafts Alkylation mechanism. A small amount of 1‚4-dimethoxybenzene was dissolved in acetic acid and t-butyl alcohol‚ along with H2SO4. The reaction was then allowed to go to completion at room temperature‚ and the crystals were washed with water and methanol. The percent yield of the product was 57.48%. This was lower due to the fact that many of the crystals were stuck in the reaction tube and could not be removed for weighing. Also‚ when a Pasteur pipet was used to remove the solvent from the reaction
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