demonstrated that the color of a given food dye depended on which light was transmitted in the visible spectrum and which light was absorbed. A quantitative measurement of the absorbance spectrum of each food dye was obtained through spectrophotometry.1 Through this method‚ we determined that the wavelength of maximum absorbance of a given food dye was directly correlated to the color of that food dye. Further‚ darker food dyes absorbed more light than lighter food dyes (Table 1). The relationship between
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Separations: Chromatography of M&M and Ink Dyes Almost all substances we come into contact with on a daily basis are impure; that is‚ they are mixtures. Similarly‚ compounds synthesized in the chemical laboratory are rarely produced pure. As a result‚ a major focus of research in chemistry is designing methods of separating and identifying components of mixtures. Many separation methods rely on physical differences between the components of a mixture. For example‚ filtration takes advantage of substances
Free Chromatography Thin layer chromatography
Objectives • To extract DNA and observe its characteristics Time Allocation: 1 hour‚ with overnight incubation/cooling the night before Note: Place the 91% isopropyl alcohol in the freezer the night before beginning the exercise. Note: If the mortar and pestle method is chosen‚ soak the split peas in distilled water the night before beginning the exercise. Materials |Materials |Label or Box/Bag |Qty |Item Description
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The following are the principal types of natural vegetation in India: (1) Tropical Evergreen Rain Forests‚ (2) Deciduous or Monsoon Type of Forests‚ (3) Dry Deciduous Forests and Scrubs‚ (4) Semi- Desert and Desert Vegetations‚ (5) Tidal or Mangrove Forests and (6) Mountain Forests. • Tropical evergreen rain forests: These forests grow in areas where rainfall is more than 200 cm. They are mainly found on the slopes of the Western Ghats and the Northeastern regions of Arunachal Pradesh‚ Meghalaya
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Bangladesh‚ we have also discussed their present scenario and future potential. II. PRESENT SCENARIO At present‚ 53% of the total electricity generation of Bangladesh is from the power plants under public sector and 47% of the net generation of the country is from private sector [2]. Even though many extra units both from public and private sector have been added to the national grid‚ the power crisis is still a big issue in the country. So due to high demand‚ maximum generation of 2087 MW
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the green planet if deforestation keeps on happening? I strongly believe that we need to stop deforestation before it is too late‚ or else we‚ humans‚ will suffer a lot from it. It has been told that forests are our world lungs. As many of us have known‚ every green plant can do photosynthesis‚ a process of producing oxygen from carbon dioxide. If deforestation keeps on happening‚ our oxygen supply will also deplete. That’s one thing I can guarantee. It means that we won’t have enough air to breathe
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photosynthetic cells had come and gone‚ and oxygen-producing types had changed the atmosphere. High above Earth‚ the sun’s energy had converted much of the oxygen into a dense ozone layer‚ a shield against lethal doses of ultraviolet radiation. Until then‚ life had not ventured above the surface of water and mud. Algae were evolving at the water’s edge‚ and one group – probably the charophytes – gave rise to plants. Cooksonia‚ a simple branching plant a few centimeters tall‚ evolved by 430 million
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TOMATO PLANT 1) Seed: Tomato seeds are small‚ flat and disk shaped and about 1/8 inch wide. They contain two energy storage organs called cotyledons and an embryo encased in a hard outer shell called the seed coat. The seed is the dormant or resting stage of the plant life cycle. When young tomato plants are damaged‚ they tend to go into a dormant‚ survival stage in which plant growth is delayed for a while. Frost damage is something to look out for when planting tomatoes early on in the season
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The Coca plant is in the Kingdom Plantae‚ the Phylum Magnoliophyta‚ the Class Magnoliopsida‚ the order Mapighiales‚ the Family Erythroxylacae‚ the Genus Erythroxylum‚ and the Species Erythroxylum Coca. The Coca plant originates in Northwestern South America particularly Columbia‚ but it can also be found in Peru‚ Venezuela‚ and Bolivia. The Coca plant can grows to a height of 7–10 ft‚ the branches are straight‚ and the leaves are green tinted ovals. The plant also has small yellowish-white flowers
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aberration of the chromatic effect. 1931= Ernst Ruska co-invented the electron microscope for which he won the Nobel prize in physics in 1986. 4 kinds of microscope Compound Microscope = is a microscope that uses multiple lenses to collect light from the sample and then a separate set of lenses to focus the light into the eye or camera. Dissecting Microscope (stereo or stereoscopic) = is an optical microscope variant designed for low magnification observation of a sample using incident light
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