AP Lab #5 Plant Pigments/Photosynthesis I. Identifying the Effects of Different Variables of Light and Carbon Dioxide on the Rate of Photosynthesis and Observing the Separation of Pigments Through Chromatography II. Introduction Plants have a variety of pigments‚ all of which absorb a different color of light. The three main pigments are chlorophyll a‚ chlorophyll b and carotenoids. Chlorophyll a is the primary plant pigment that absorbs red and blue light‚ which ultimately appears green to the human eye
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6‚ NO. 9‚ SEPTEMBER 2011 ARPN Journal of Agricultural and Biological Science ©2006-2011 Asian Research Publishing Network (ARPN). All rights reserved. ISSN 1990-6145 www.arpnjournals.com PROMISING ANTIFUNGAL EFFECT OF SOME FOLKLORIC MEDICINAL PLANTS COLLECTED FROM EL- HAMMAM HABITAT‚ EGYPT AGAINST DANGEROUS PATHOGENIC AND TOXINOGENIC FUNGI Department of Bioprocess Development‚ Genetic Engineering and Biotechnology Research Institute‚ Mubarak City for Scientific Research and Applied Technology
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Photosynthesis is a process done in the chloroplasts of plant cells that is beneficial to all of life. Plants are able to convert light to energy which is beneficial to the plants‚ while also giving off oxygen as a byproduct for humans. Chloroplasts are in the thylakoid discs of a plant cell‚ that contain chlorophyll a and chlorophyll b‚ which are it’s light-capturing pigments. Colors in the wavelengths are either absorbed or reflected by the chlorophyll in which case green is reflected and colors
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Photosynthesis is carried out by many different organisms but usually by plants and algae. All these organisms convert CO2 (carbon dioxide) to organic material by reducing this gas to carbohydrates in a rather complex set of reactions. Electrons for this reduction reaction ultimately come from water‚ which is then converted to oxygen and protons. Energy for this process is provided by light‚ which is absorbed by pigments. Chlorophylls absorb blue and red light and carotenoids absorb blue-green light
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accessory pigments. flagella is absent in red algae as well as centrioles 5‚000 species(approximate number of known species) are exclusively marine‚ abundant in fresh and warm water. Different species may be: a. Free living b. Epiphytic; or c. Parasitic STRUCTURE OF RED ALGAE Chiefly feathery Branched-filamentous‚ sometimes ribbon-like with gelatinous suface Smaller than most brown algae Rarely more than 3 or 4 ft. long Red in color‚ due to phycoerythrin -a red pigment present with
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This video “Xapiri” by Bruce Albert observes the xamãs Yamomami or the shamans of the Yamomami tribe in their spiritual ritual involving the use of a plant produced from the resin of the Virola tree. “At the beginning of time‚ Father Sun practiced incest with his daughter‚ who acquired Viho by scratching her father’s penis.”1 This is considered as a “sacred snuff from the sun’s semen‚ and since it is still hallowed‚ it is kept in containers called muhipu-nuri‚ or ‘penis of the sun.’”1 It is a hallucinogen
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Electromagnetic energy‚ in the form of light‚ travels in wavelengths and is measured in nanometres (nm). Pigments within matter‚ such as plants‚ absorb varying wavelengths of light. The absorption spectrum can be defined as a graphical representation of a pigment’s ability to absorb light against varying wavelengths (nm). The pigments light absorbing ability is measured using a spectrophotometer. An action spectrum can be defined as the graphical representation of the rate of photosynthesis against
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and increase the rate of photosynthesis. The purpose of this laboratory experiment was to determine which solution would have the highest impact on oxygen production within the aquatic plant‚ Elodea densa (Brazilian Waterweed). The photosynthesis reaction which occurs in the chloroplasts in the leaves of the plant
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into a chemical energy that plants store for later. Without photosynthesis‚ the world as we know it would not exist. All the plants would die and so would a major food and oxygen source. During Photosynthesis water is sucked up through the roots up the stem and to the leaves. The leaves take in carbon dioxide and begin to absorb sunlight. these things combine to make glucose and oxygen. The plant then uses the glucose and oxygen is expelled through the stomata of the plant as a waste product. In The
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PLANT SYSTEMS QUESTION 1979:L. PETERSON/AP BIOLOGY In relation to plants‚ describe in detail one way of: a) measuring the rate of transpiration b) measuring the rate of photosynthesis c) separating pigments Essay : Transpiration is the loss of water vapor from land plants into the atmosphere‚ causing movement of water through the plant from the soil to the atmosphere via roots‚ shoot and leaves‚ which occurs mainly through the stomata. Factors which can affect the rate of transpiration are
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