NaOH + NaI + H2O CH3I Before coming to lab‚ please review the following techniques: "Reluxing a reaction‚" "Extraction and washing‚" "Drying an Organic Solvent‚" "Evaporating an Organic Solvent‚" "Analyzing a Solution by Thin Layer Chromatography (TLC)‚" "Separating Mixtures by Column Chromatography‚" and "Characterizing Compounds by IR." Notice that this lab brings together most of the techniques that we have used this semester. Then complete the following table before coming to class so that you
Free Chromatography Thin layer chromatography Distillation
them to improve the amount of numbers they were able to recall. Many researchers have suggested that ingesting dark chocolate at least once a week will improve memory because of the high amounts of flavonoids in dark chocolate. Many studies suggest that eating chocolate and other foods high in flavonoids will improve memory in the elderly and also protect the brain from normal memory loss due to age (Russell‚ February 2016). Despite the general assumption that chocolate improves memory‚ six of the
Premium Cognition Chocolate Memory
Client Report 1 5/29/15 Clients: T.J. Maxx and Burlington Coat Factory Social Media and PR This week‚ I looked at the social media activity of T.J. Maxx and Burlington Coat Factory on Instagram‚ Twitter‚ and Facebook. In terms of Instagram‚ T.J. Maxx seemed to focus on spring fashions and trends this week. The pictures they used were sent to them by followers‚ whom they tagged and acknowledged in their posts. I thought this was a smart business strategy‚ because not only were they showcasing their
Premium
acid 2. 3M Sodium hydroxide solution 3. 3M Hydrochloric acid 4. Iodine 5. Dichloromethane 6. Ethanol 7. Anhydrous MgSO4 8. Mortar and pestle 9. Beakers 10. Capillary tubes(Melting-point tubes) 11. TLC plates 12. Painkilling tablets 13. pH papers 14. Test tubes 15. Conical flasks 16. TLC
Premium Opioid Codeine Morphine
concentrate (C1)‚ however concentrate 1 did not create a visible spot on the TLC plate‚ so it is unclear whether or not carotenoids were present in concentrate 1. However‚ since concentrate 2 (C2) yielded 2 spots on the TLC plate‚ it is possible one of these spots was a carotenoid. In particular‚ spot 2 has the largest Rf value‚ indicating it was the least polar compound because it had the largest A value‚ traveling the farthest up the TLC plate with the non-polar developing solvent. It can be hypothesized
Premium Chromatography Analytical chemistry Silica gel
Stereochemistry of Dihydroxylation Reactions Question: Can the stereochemical outcome of dihydroxylation reactions be determined by thin layer chromatography? Overview: In this experiment‚ you will perform two reactions that transform alkenes into diols. While similar in functional group transformation‚ these reactions may lead to stereochemically different products. The two possible products are diastereomers of one another‚ and therefore have different physical chracteristics. After
Premium Thin layer chromatography Solvent Oxidizing agent
fight certain cancers. In this lab you will isolate lycopene from tomato paste. To do this you will first extract carotenoid pigments from the paste and then use column chromatography to isolate the lycopene from the other pigments. You will then use TLC to evaluate the column chromatography separation. Note: because lycopene is light-sensitive‚ prevent any unnecessary exposure to light. Procedure: Weigh roughly 1.0 g of tomato paste into a 15 mL centrifuge tube. Add 4 mL of a 50/50 (% volume)
Premium Column chromatography Chromatography Tomato
Fishes of mixed sexes were divided into four groups (n = 21) and kept in glass aquarium containing 15 litre of water. The control and experimental groups I‚ II & III were exposed to 5‚10 and 15ml of dose in 15Litre of different concentration of (25%‚ 50%‚100%) aqueous leaf extract of Annona squamosa in it every alternate day till 30 days. The control group and experimental fishes were fed with pelleted commercial food and worms at 2% of body weight and water was changed daily after 24 hours of feeding
Premium Water Nutrition Bacteria
leading to faster breakdown of vitamin B12. The higher rate of loss is partially offset by the shorter cooking times required. A single study indicated that microwaving broccoli loses 74% or more of phenolic compounds (97% of flavonoids)‚ while boiling loses 66% of flavonoids‚ and high-pressure boiling loses 47%‚ though the study has been contradicted by other studies. To minimize phenolic losses in potatoes‚ microwaving should be done at 500W. Spinach retains nearly all its folate when cooked
Premium Vitamin Cooking Microwave oven
phytochemicals were detected and then in vitro antidiabetic activity of P. guajava were detected by using alpha amylase and alpha glucosidase enzyme in an in vitro model.The study reveals the presence of phytochemicals such as carbohydrate‚ tannin‚ flavonoids‚ phenols etc.‚ Among the various extracts the aqueous and ethanolic extracts which contains the large number of phytoconstituents. The P. guajavaleaves
Premium Blood sugar Diabetes mellitus