...produce ‘food’ for themselves, or some for of sugar, like glucose. Photosynthesis has two stages which take place within the chloroplasts of a plant cell, where the photosynthetic pigments, chlorophyll reside. The first stage occurs in the thylakoid of the chloroplasts and is called ‘the light reactions’. During this stage water is split, the oxygen changes (or is evolved) and energy is harvested through photophosphorylation. Photophosphorylation transforms the light energy into the chemical energy of ATP and NADPH, which aid in the next stage, the Calvin Cycle or light independent reactions. During the Calvin Cycle, carbon dioxide is reduced to glucose and oxygen is released as a by product, at which time the ADP and the NADP+ are returned to the light reactions to start the cycle over again, or regenerate. A simplified equation for photosynthesis is as follows: 6CO2 + 6H20 + Light Energy → C6H12O6 (glucose) + 6O2 Photosynthesis is basically a plants version of cellular respiration and is essential for their survival. During the first stage, light energy or electromagnetic energy/radiation, is absorbed by the chlorophyll, except for the green wavelengths of the visible light spectrum. This is why they appear to be green, or why we see green, because the green light is being transmitted back to our eyes from the chlorophyll. Chlorophyll a is the main photosynthetic pigment, while chlorophyll b slightly broadens the spectrum of light absorbed through accessory...
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...SCI 115 Dr. Barbosa Assignment # 1 Paper due Week 4 By Susan B. 10/26/12 Photosynthesis is an amazing process that transpires inherently and is one that is required for all living organisms to sustain existence on this planet. The efficiency of this process has sparked inventions, such as the semiconductor-based solar cell, that would allow humans to produce energy in a way that is very similar to that of a plant’s photosynthetic process. In this paper, I will compare and contrast the photosynthetic process with that of semiconductor-based solar cells in their capacities to generate energy while also explaining the application of thermodynamics to each process. In order to discuss the photosynthesis and the semiconductor-based solar cell, it is crucial to understand what is involved in each process and how they could be different or the same. Photosynthesis is the process by which plants and some bacteria use the energy from sunlight to produce sugar, which cellular respiration converts into ATP, the fuel used by all living things. The solar cell connects solar energy to convert it into electricity, which is required by all humans. This process can be understood as solar electricity, which is created by using Photovoltaic technology, which is converting solar energy into solar electricity from sunlight. This system is providing sunlight to everyday use constituents such as computers, lighting and electrical equipment. The foremost contrast between photosynthesis...
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...Experiment 1 Alternative Assignment (20 points) Paper Chromatography (Separate Plant Pigments) Watch the following video: https://www.youtube.com/watch?v=HTWUS_yb1Bw Please answer these questions (1–2 paragraphs per question): 1. Why are plants green? (10 pts) Some plants are green because they do not absorb or use green light in their photosynthetic processes. Instead the green light gets reflected off the pigments and that is the light that we see with our eyes. The plant absorbs and utilizes all the other colors in the spectrum for its photosynthetic processes. The reason the plant hasn’t evolved to accept green light is probably because there is a greater energy output in the blue and violet wavelengths of light therefore it’s more...
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...AP Biology Exam Review: Lab Essays At least one essay (FRQ) on the exam will be based on an AP laboratory. To prepare for this question, review the objectives for all twelve laboratory exercises. The College Board does not necessarily expect that you have completed that lab, but rather that you have investigated the objectives of the lab. You may be asked to “design an experiment to determine….” You don’t necessarily need to create a new lab; if you have done an activity that would answer the question, simply describe it. For a good response, you should include the following. 1. State a hypothesis [as an “if…..(conditions), then….(results)” statement] Be sure your hypothesis is testable. 2. Identify the variable factor. 3. Identify the control. Be certain to explain the control for the experiment. 4. Hold all other variables constant. 5. Manipulate the variable. 6. State how you would measure the results. 7. Discuss the expected results. Relate the results to your hypothesis. 8. Include steps to replicate or verify. You may be asked to graph data. Be sure to use a graph that is appropriate for you data. Bar graphs are used when data points are discrete (not related to one another), while line graphs are used with the data are continuous. If there is a data point at zero, be certain to extend your line to 0, but do not extend the line to 0 if there is no data point at zero. Other points to keep in mind: ...
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...Employing Microalgae Feedstock for the Production Biodiesel Name: Musfiq Islam UW ID: 20300084 Course: BIOL 443 Professor: Dr. Owen Ward Introduction Global interests in biofuel production as a substitute for liquid transport fuel have grown substantially in recent years, mainly due to concerns over energy security and climate change (Yahya et al, 2012). The most common used biofuels are biodiesel and bio-ethanol, which can replace diesel and gasoline, respectively, with limited or no modifications of vehicle engines (Karthikeya, 2012). These first generation biofuels are typically extracted from food and oil crops including rapeseed oil, sugarcane, sugar beet and corn as well as vegetable oil and animal fats using traditional technologies (Brennan and Owende, 2009). However, the use of first generation biofuels have generated wide-scale criticisms, primarily due to raising competition with food production, increased water consumption, soil degradation, biodiversity loss, their low energy potential and their role in greenhouse gas emissions (Barbosa et al., 2011). A particular concern is that the demand for biofuels could place substantial additional pressure on the natural resources such as arable land. Currently, about 1% (14 million hectares) of the world’s available arable land is used for the production of biofuels, providing 1% of global transport fuels (Beal et al., 2012). However, with a fixed and possibly reducing amount to arable land, increasing the share...
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...6 Cellular Respiration: Obtaining Energy from Food Muscles in action. Sprinters, like all athletes, depend on cellular respiration to power their muscles. CHAPTER CONTENTS Energy Flow and Chemical Cycling in the Biosphere 92 Cellular Respiration: Aerobic Harvest of Food Energy 94 Fermentation: Anaerobic Harvest of Food Energy 101 CHAPTER THREAD Aerobic versus Anaerobic Lifestyles BIOLOGY AND SOCIETY Marathoners versus Sprinters THE PROCESS OF SCIENCE What Causes Muscle Burn? EVOLUTION CONNECTION Life before and after Oxygen 91 102 103 Aerobic versus Anaerobic Lifestyles BIOLOGY AND SOCIETY Marathoners versus Sprinters Track-and-field athletes usually have a favorite event in which they excel. Some runners specialize in sprints of 100 or 200 meters. Others excel at longer races of 1,500, 5,000, or even 10,000 m. It is unusual to find a runner who competes equally well in both 100-m and 10,000-m races; most runners are more comfortable running races of particular lengths. It turns out that there is a biological basis for such preferences. The muscles that move our legs contain two main types of muscle fibers: slow-twitch and fast-twitch. Slow-twitch muscle fibers can contract many times over a longer period but don’t generate a lot of quick power for the body. They perform better in endurance exercises requiring slow, steady muscle activity, such as marathons. Fast-twitch muscle fibers can contract more quickly and powerfully than slow-twitch fibers but also...
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...and especially Mediterranean countries (De Lotto 1975, Cox 1981, Cox and Ben-Dov 1986, Duso 1990, Ben-Dov 1994 and Mansour et al. 2011). It is found on all parts of the vine, for example, hidden under the bark of the trunk, in the first and second year canes, leaves, clusters, cordons and within developing buds by the late spring and summer. During the winter months, the only life stages are nymphs located under the bark predominantly at the graft union, on the pruning wounds and below the base of spurs. They feed by sucking plant sap from the stem, branches, leaves, fruits and roots, resulting in wilted, distorted and yellowed (chlorotic) leaves, premature leaf drop, stunted growth‘ and occasionally the death of infested plants or plant parts (Kosztarab and Kozar 1988). They excrete large quantities of honeydew that encrust the leaves, canes and clusters, resulting in further crop damage and defoliation. Sooty moulds colonize the honeydew coated grapes and leaves causing them to look dark and unsightly and this leads to reduce fruit quality and lower tree vitality through the loss of photosynthetic capacity (Godfrey et al., 2002). Moreover, P. ficus transmits Grapevine Leafroll-associated Virus 3 (GLRa V3) (Engelbrecht, Kasdorf 1990 and Golino et al. 2002); therefore, it is considered a dangerous pest even at low infestation levels. The control of mealybugs commonly relies on the use of insecticides. The effectiveness of some chemical controls is often reduced because the...
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...life is exposed to [2]. A thorough understanding of the UV-B radiation levels is especially important in agriculture as its effects on crop species is essential to design crops that can produce food and other raw materials for the increasing world population. Increased UV-B exposure has the potential to damage DNA, generate reactive oxygen species (ROS) and disrupt cellular process in many plant species [10]. Specifically, the primary deleterious effects of increased UV-B occur on the efficiency of the photosynthetic apparatus and the reduction of photosynthetic genes. Damage to the thylakoid membrane and destruction of chlorophyll (Fig. 6) along with the decrease in the amount of photosynthesis are also attributed to over exposure of UV-B [9]Moreover, in the chloroplast thylakoid membrane the D1 and D2 proteins of photosystem II (water-plastoquinone oxidoreductase complex) are rapidly degraded in course of UV-B irradiation [9]. Under conditions where UV-B impairs photosynthetic electron transport, excess ROS would likely be generated by a reduced ability to dissipate excitation energy causing extreme damage to the cell...
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...Corn Integrated Pest Management Integrated Pest Management (IPM) is a holistic approach to monitoring pest lifecycles and prevalence in farmer’s fields to determine the best pest control methods to protect crop yield potential in the current and following growing seasons. IPM is a continuum of pest management evaluations, decisions, and controls that encompass pest lifecycles and prevalence, agronomic practices such as crop rotation, seed selection, soil management, and timely use of pesticides to minimize pest damage and protect environmental resources. Red Root Rot a Late Season Disease of Corn * Roots and basal stalk tissue infected with red root rot characteristically have reddish-pink, rotted roots. * Stalks are weakened and susceptible to lodging. * Premature plant death is common and can occur quickly and yield losses can be as high as 15-20%. * Genetic resistance to red root rot is uncommon and breeding for disease resistance is difficult. Management Management options are limited. Crop rotation with a non-host such as soybean can provide some control.1 Genetic resistance has been difficult to incorporate into corn products, although the rate of disease development varies greatly between corn products. Research on inheritance of disease resistance indicates that it is a polygenic trait with additive gene action, which has complicated breeding efforts.1 Environmental stress during the season may contribute to disease infection and severity...
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...Pak. J. Weed Sci. Res. 17(1): 51-63, 2011. EFFECTS OF WEED CROP COMPETITION PERIOD ON WEEDS AND YIELD AND YIELD COMPONENTS OF SESAME (Sesamum indicum L.) Zubair1Ijlal1, Asif Tanveer1, Muhammad Ehsan Safdar2, Ahsan Aziz2, Muhammad Ashraf2, Naeem Akhtar2, Farhan A. Atif2, Asghar Ali2 and Muhammad Mudassar Maqbool3 ABSTRACT Farmers’ efforts to control Sesame (Sesamum indicum L.) weeds provide low economic returns as the information regarding critical weedcrop competition period is lacking. We investigated the critical weed-crop competition period in sesame at the Agronomic Research Area, University of Agriculture, Faisalabad Pakistan during summer season (July-November) 2005. Treatments were weed-crop competition periods (WCCP) of 3, 4, 5, 6 and 7 weeks after emergence in addition to full season competition and full season weedy check as negative and positive controls, respectively. A gradual decrease from 6.88 to 12.40 % in seed yield was recorded with 6 weeks to full season weed-crop competition. Non significant reduction in seed yield was observed up to 5 weeks WCCP. Weed crop competition for a period of 3 weeks did not show significant decrease in straw yield, number of capsules plant-1, number of seeds capsule-1 and 1000 seed weight, whereas a significant decline in all these parameters was noted as WCCP exceeded 3 weeks. Weed density and dry weight did not increase significantly until WCCP was prolonged up to 3 and 4 weeks, respectively. This study led to conclude that...
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...What is Microbiology? Microbiology is the study of organisms too small to be seen with the naked eye. Originally, emphasis was placed on harmful micro organisms which cause disease or spoilage of beverages and food, but it is now recognized that many microbes have essential roles in our ecosystem or can be used to accomplish beneficial tasks. Human history is full of examples of major devastations caused by bacteria and viruses. Some of these historically important diseases still occur, such tuberculosis and yellow fever. Microorganisms are evolving to cause new infectious disease problems such as Lyme disease and AIDS, which capture public attention. Control and eradication of infectious diseases remain important goals of many microbiologists. The recognition that microorganisms were responsible for what was earlier thought to be "spontaneous generation" opened the door to industrial (pharmaceutical, chemical, energy) and food microbiology, technologies which contribute substantially to today's way of life. Microorganisms in soil and water are essential in the transformation of carbon, nitrogen, oxygen, sulfur and iron to products needed by plants and animals. In various ways, microbes participate in environmental cycling and degradation and global change. In the last few decades, microorganisms have been recognized as ideal model systems for the study of basic biological processes. More recently, microbiologists have brought an exciting dimension to the study of biology...
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...Summer Project Report Study of MDA (malondialdehyde) as abiotic stress marker in CSV-17 variety of Sorghum bicolor. Submitted in partial fullfilement of the requirement for B.Tech. Biotechnology Semester VII AMITY INSTITUTE OF BIOTECHNOLOGY AMITY UNIVERSITY RAJASTHAN JAIPUR 2011 Supervised by: Dr Ajit Kumar Sr. Research Officer S.P. Institute of Biotechnology, Jaipur Submitted by: Ravi Pareek DECLARATION I hereby declare that the project report entitled “Study of MDA (malondialdehyde) as abiotic stress marker in CSV-17 variety of Sorghum bicolor” is a record of the work compiled by me under the supervision and guidance of Dr. Ajit Kumar, S.P. Institute of Biotechnology, Jaipur as a part of my 45 days summer training. Ravi Pareek (B.TECH-BIOTECHNOLOGY) (AUR0821094) ACKNOWLEDGEMENT First of all with due regard to my respective god with whose kindness and blessing we could be able to accomplish the task of training. Mr. Sourabh Pareek, for his kind permission to allow me to undergo my major project at S. P. Institute of Biotechnology, Jaipur. I am overwhelmed with rejoice to take this opportunity to evince my profound sense of reverence and gratitude to my esteemed supervisor respective Dr. Ajit Kumar, for giving his regular advice and excellent suggestion which have helped us for completing the study. His regular assistance and guidance really helped me to bring formidable task in successful manner. Sincere thanks to Dr. Sonali Jana and Dr. Neha Upreti for their cooperation...
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...The Diversityof Life Lab Manual Stephen W. Ziser Department of Biology Pinnacle Campus for BIOL 1409 General Biology: The Diversity of Life Lab Activities, Homework & Lab Assignments 2013.8 Biol 1409: Diversity of Life – Lab Manual, Ziser, 2013.8 1 Biol 1409: Diversity of Life Ziser - Lab Manual Table of Contents 1. Overview of Semester Lab Activities Laboratory Activities . . . . . . . . . 2. Introduction to the Lab & Safety Information . . . . . 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 15 30 39 46 54 68 81 104 147 3. Laboratory Exercises Microscopy . . . . . . Taxonomy and Classification . Cells – The Basic Units of Life . Asexual & Sexual Reproduction Development & Life Cycles . . Ecosystems of Texas . . . . The Bacterial Kingdoms . . . The Protists . . . . . . The Fungi . . . . . . . The Plant Kingdom . . . . The Animal Kingdom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 13 17 22 26 29 . 32 . 42 . 50 . 59 . 89 4. Lab Reports (to be turned in - deadline dates as announced) Taxonomy...
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...of methylene blue and malachite green dye in single dye solution were studied. As a result, granular form of coconuts have higher percentage removal dye of methyelene blue and malachite green blue which is 98.3% and 99.0%. This study shows a major approach of turning the agricultural waste to an added value product which is absorbent for wastewater treatment especially in textile industries sector. Keywords: Coconut fibre, absorption, melethylene blue dye, malachite green dye. 1. INTRODUCTION Water pollution has become a serious problem around the world including Malaysia. Malaysia is one of the country that fall into this negatively impacts on the sustainability of water resources. Many industries sector in Malaysia such as textile, paper, paint, pharmaceuticals, food, leather, cosmetics, tannery, printing and plastics used wide verieties of dye in order to color their product for example such as batik in textile industry. Among those industries sector in Malaysia, textiles industry ranked first in the usage of dyes for coloration of fiber [1]. Considering both volumes discharged and effluent composition, wastewater from the textile industry was declared as one of the major sources of wastewater in ASEAN countries [2]. The wastewaters discharged from dying processes exhibit high biological oxygen demand (BOD), high chemical oxygen demand (COD) are highly colored, hot, alkaline...
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...combustibility, sugar and alkaloid contents. Monitoring N applications thoroughly for form, quantity, and timing of application is a prerequisite in modern agriculture. As in other field crops, balanced N-K fertilization enhances tobacco growth and improves the uptake of both nutrients, which in turn reduces nitrate losses during and after the cropping season. The importance of K on mineral nutrition in tobacco production in terms of yield and quality is presented. The role of K in determining the chemical composition of tobacco leaf is now well established. K content of dry matter must reach 2 to 2.5 percent and chloride (Cl) content must remain below 1 to 1.5 percent in order to ensure good maturation, perfect combustibility and a good taste. The paper reports several pot and field experiments carried out in France, China and Cuba, in which various factors affecting yield and quality of the tobacco crop were studied including dose, source, and timing of potash applications. The effect of the combination of various potash forms (potassium sulphate, potassium chloride, potassium nitrate, potassium bicarbonate) with two N sources (nitrate –N from potassium nitrate, and ureic nitrogen from urea) was investigated. The following measurements were recorded: yield parameters; mineral nutrients; sugar; the alkaloid contents of tobacco leaves at three stalk-levels; and water-soluble alkalinity which is an indicator of combustibility. In an experiment on tobacco for cigar production, the effect of...
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