Chlorophyll

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    Found in the chloroplasts of plants, chlorophyll absorbs certain wavelengths of light within the visible light spectrum (webexhibits, 2016). Chlorophyll is able to absorb light colours such as red and blue however green is reflected making the plant appear green. Apart from colouring, the fundamental role of chlorophyll is to channel the energy of sunlight into chemical energy. There are multiple types of chlorophyll however all land plants contain chlorophyll a and b. The main differences between the two are that Chlorophyll A is the principle photosynthetic pigment, present in all photosynthesising autotrophs with the exception of bacteria and it becomes blue green in its pure state. Whereas, Chlorophyll B is an accessory photosynthetic pigment, becomes olive brown in pure state and is not evident in diatoms, cyanobacteria and red and blue bacteria. Chlorophyll is also called photoreceptors which by definition are a structure in a living organism, especially a sensory cell or sense organ that responds to light falling on it. In this instance, the photoreceptor traps light and exploits it through the process of…

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    photosynthesis comes from the sunlight absorbed by the chlorophyll molecules (Merzlyak, Chivkunova, Zhigalova, & Naqvi 2009). These chlorophyll molecules then transfer the light energy to chloroplasts and that light energy is converted into chemical energy (Merzlyak, Chivkunova, Zhigalova, & Naqvi 2009). The purpose of this experiment was to observe what the absorbance spectrum of Spinacia oleracea extract was and what the absorbance spectrum of the pigments were within the extract. From the…

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    been completed, proceed by obtaining five 50 mL beakers. Then place 40 mL of sodium bicarbonate and 10 spinach leaf disks into each 50 mL beaker. Next, immediately place one of the 50 mL beakers into each of the light boxes, making sure to also place one of the beakers into the light-proof cabinet as well. Also, make sure the light boxes form a square around the incoming light source. Next, proceed by turning on the light and at five minute intervals, all the way up to thirty minutes, make sure…

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    Usually plants grow in natural sunlight, but do they grow the same in colored light? People always just put their plants outside, then leave them. Is there an effect on plants in the colored light, or is it just the same. Part of the plant is the chlorophyll, which is the part of that is responsible for the pigment or color found in the organism. It is responsible for the green color of plants, except in the fall where the pigment changes to red, yellow, or orange. This happens because the…

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    of a plant, the plants were used for all in situ measurements as growth parameters. The plants were sampled on 0, 3rd and 6th day after stress application. 1.4. Assessment of Growth Effects by PGPR Maize leaf samples were randomly collected 0, 3rd and 6th days after drought stress (DAS) with five biological replicates for each treatment group. Plant height (cm) was measured from the base of the plants to the tip of longest leaf. Root and shoot fresh weight (g) and lengths (cm) were measured from…

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    Light Color and Photosynthesis Inquiry Introduction: Photoautotrophs are organisms that make their own food using sunlight such as plants. They acquire free energy through a process called photosynthesis. Through photosynthesis, sunlight provides the required energy to build carbohydrates from CO2 and H2O. This entire process takes place in the chloroplast which contains chlorophyll. Chlorophyll is the location that absorbs the sunlight and combines carbon dioxide and water in order to make…

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    Therefore, photosynthesis works best in a more neutral environment where the pH levels aren’t too acidic or too basic. Introduction - Photosynthesis is a process that uses the energy from sunlight and converts carbon dioxide into organic compounds. There are several ways to test the rate of photosynthesis and to determine what factors and elements are important for this process to be successful. Chromatography is known as the separation of a mixture by passing it in solution or suspension or…

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    The difference between the two filter chlorophyll a concentrations is the presence of the smaller phytoplankton in the community. This allowed us to determine the dominant size of phytoplankton at each station. Chlorophyll a concentration was analyzed by extracting chlorophyll a from the respective filter and measuring fluorescence present in the sample. The filters were placed in centrifuge tubes with 90% acetone and placed into a freezer overnight. The next day, 1 mL of the sample was…

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    pigments were there? What did they look like? What wavelength(s) of light did they absorb? You should answer questions #1-4 on p. 141 of your lab book in this section. Also, you will need to create a graph of the 4 pigments in this section. Make sure to label your axes appropriately, and give the graph a title. After absorbing the wavelength of light of chloroplast pigments I found out that there are numbers which are going up and down frequently. It has so many different colors, ratio I the…

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    Some bodies of water can be nitrogen-rich but likely in the Galveston Bay and Galveston Ship Channel, it could be manmade run-off. To determine which taxa are more abundant based on the addition of different nutrients a chlorophyll analysis and visual analysis can be used. I want to determine the community composition based on different nutrient levels using chlorophyll analysis. This can also be compared to visual analysis of the sample water by identifying phytoplankton genera. I believe…

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