Result In the experiment‚ Silver nanoparticles is used as it has low absorption losses‚ compared to other metals. The formation of silver nanoparticles is done by depositing of various mass thickness of uniform layer of silver at the rate approximately 2 Å/ s at 1x10−5 Torr. After this‚ the sample were annealed in nitrogen for 50 min at 200 °C. The particle coalesce together to formed island due to surface tension. In this experiment‚ four samples were used‚ a) 1.25 µm SOI Test Cells – The thickness
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IOP is usually measured in an indirect way by measuring the tension on the surface of the eye‚ which is extrapolated to estimate the internal pressure. Therefore‚ methods to measure the IOP are influenced by corneal properties‚ like thickness and biomechanics. The Goldmann Applanation Tonometer (GAT) remains the most common method and the gold standard for measuring IOP. (Clement et al.‚ 2016). Principle of GAT: The GAT depends on the Imbert-Fick principle‚ which states that the pressure inside
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As discussed above‚ during DSC analysis two types of FFW and NFW were observed in PS‚ PT‚ and MA samples. The low-temperature XRD technique was used in this study to define the boundary between the FFW and NFW in PS‚ PT‚ and MA samples more accurately. Dowell and co-workers [29] and Shallcross and Carpenter [30] have reported the low-temperature XRD studies on ice structures. The low-temperature XRD analysis has been used by the authors to study the properties of water in low-rank coals [16‚ 26]
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The antioxidant capacity of Bifurcaria bifurcata extracts from the Peniche coast was evaluated by the analysis of the total polyphenol content (TPC)‚ by the DPPH free radical scavenging activity and by Oxygen Radical Absorbance Capacity (ORAC). The results are expressed in Table 1. The methanolic fraction was more potent than the dichloromethane fraction‚ with an EC50 of 58.82µg/mL (50.65 – 68.31)‚ which was very similar with the standards‚ ascorbic acid and BHT‚ that exhibited an EC50 of 22.43µg/mL
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Alyssa Caparelli Organic Chemistry 12A Professor Alston October 28‚ 2014 Isolation of Chlorophyll and Carotenoid Pigments from Spinach Purpose The purpose of this experiment was to isolate ß-carotene‚ chlorophyll-A‚ and chlorophyll-B from spinach using column chromatography. Spinach was dehydrated using ethanol‚ and the pigments were extracted with dichloromethane. The spinach extracts were dried using CaCl2. Then‚ the solid pigments were run through a column using a non-polar solvent‚ hexane
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Lab Write Up Pre-Lab Questions: 1. What precipitation reaction could be used to separate and remove silver ions from a mixture containing iron (III) and zinc ions? A precipitation reaction that could be used is hydrochloric acid Ag+(aq) + HCl(aq) AgCl(s) +H+(aq) – white. 2. What precipitation reaction could be used to separate and remove iron (III) ions from the remaining mixture containing iron (III) and zinc ions? Fe3+(aq) + 3NaOH(aq) Fe(OH)3(s) + 3Na+(aq) 3. How can the presence of silver
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As a liquid evaporates‚ it lowers the temperature of the substances around them‚ because evaporation is an endothermic process. In the graph‚ each substance has a different curve. Some lowered the temperature much more than others. This is because different substances require differing amounts of energy to evaporate. To test this‚ the temperature change from the evaporation of 4 different alcohols was measured and compared‚ along with cyclohexane. Methanol had the largest change in temperature‚ 18
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Radiator fluid Coolant Radiator fluid is an essential unit of the auto since it shields the motor from the solidifying harm. At the point when the water gets changed over into ice‚ it represents an issue for the auto. Liquid catalyst is really the warmth exchange liquid which is utilized to ensure the solidifying. In both the sunlight based water radiators and the HVAC chillers it is utilized. Concoction are added to the water keeping in mind the end goal to keep the solidifying. Liquid catalyst
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Investigation 7: How Can The Waste Be Made Useful? February 20‚ 2014 Mian Yang Tuesday 8:30am Group #6 Steven Hengen‚ Joe Wahl‚ Colleen Strom‚ Nicole D Introduction: Chemical interactions can often lead to the production of environmentally unsafe byproducts. If the byproducts have no use‚ they are disposed as waste. Waste disposal companies make profit by collecting and disposing large amounts of these unused byproducts. These companies often concentrate the byproduct solutions so that they
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Discussion and Interpretation of Results The addition of HBr to 1-hexene created a 2-bromohexane‚ as indicated from the ethanol silver nitrate test and sodium iodide/acetone test. The observations when the product was subjected to these tests were similar to what were observed with the 2° bromide compound. When subjected to the silver nitrate test‚ the product produced a precipitate at the same rate of the 2° bromide compound‚ and the product produced a hue of yellow that was also similar to the
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