Effect of cold stress on photosynthesis in barley Essay

Effect of cold stress on photosynthesis in barley - Essay Example Consequently, it may be referred to as the process by which light energy is converted into chemical energy and stored in sugar bonds in green plants. Basic photosynthetic knowledge notes that green plants breath in carbon dioxide during the day and combines the said molecules to those of water molecules especially hydrogen in the synthesis of nutrients. Consequently, in green plants, photosynthesis involves the use of the chlorophyll green pigment that is found in the leaves or stems of such plants. As resultant by-product for the photosynthesis process is usually oxygen. In this context, plants are usually termed as essential purifiers of air. However, since photosynthesis is a process that takes place in the presence of sunlight, it does not occur during the night (Eaton-Rye, Baishnab & Thomas 66). As such, plants take in oxygen during the night and release carbon dioxide. As a topic, the study of photosynthesis is particularly of interest to farmers and scientists. Factors that ma y affect the rate of photosynthesis Basically, there are three main factors that are known to have an effect on the rate of photosynthesis. They include: i. Light intensity ii. Carbon dioxide iii. Temperature In this discussion, I will illustrate how each affects the rate of photosynthesis. i. ... From this graph, it is evident that there is a significant increase in rate of photosynthesis between point A and B. however, after point B, the rate begins to decline and later becomes constant up to point C. Within these two points (B and C), there is no effect on photosynthesis rate even with an increase in the intensity of light. Consequently, too much light intensity may damage the chloroplast of leaves: hence, the strategic arrangement of leaves in a plant without any overlaps (Kalman 25). ii. Carbon dioxide: The rate of photosynthesis linearly increases with an increase in the concentration amount of carbon dioxide available to a plant. Scientifically, the earth is composed of a varying carbon dioxide amount of between 0.03% and 0.04%. Therefore, a high concentration of it will lead to higher photosynthetic rates. However, this increase is up to a particular point, from which it begins to decline and ultimately becomes constant. This is as shown in the graph below. In this gra ph, points A to B indicate an increase in rate of photosynthesis, while points B to C indicate the decline and constant level of the same. iii. Temperature: With this factor, the higher the rate of temperature the greater will be the photosynthesis rate. Since photosynthesis is a chemical process, its rate will increase with higher temperatures as most of the other chemical process. However, the increase in temperatures beyond 400C, will lead to the rate of photosynthesis beginning to decline or slow down. The reason for this is that enzymes responsible for photosynthetic chemical process are sensitive to temperatures hence, destroyed at high/extreme temperatures levels. Consequently, it should be

Two Examples of Environmental Impact Assessments Essay Example for Free

Two Examples of Environmental Impact Assessments Essay The cities of Baku, Azerbaijan and Kingston, Ontario Canada are worlds apart, both geographically and culturally. They share at least one characteristic: the need for water. Like every other city on earth, they have built systems to accommodate their needs for water, electricity, and all the other necessities of modern life. Each city also has environmental problems that go hand in hand with urban habitation. The two Environmental Impact Assessments are examples of the challenges engineers and city planners face everyday to minimize the adverse effects on the ecosystem. Both cities, like all modern cities, are locked in a perpetual struggle to find a balance between the needs of the environment and the needs of the city. Wastewater Treatment In Baku, Azerbaijan Azerbaijan is a small country in central Asia on the Caspian Sea. Russia lies to the north. Georgia is to the northwest, Armenia is to the west, and Iran is on its southern border. The capitol of Azerbaijan is Baku and is also its largest city. Located on the Absheron peninsula, it is home to nearly 2 million people. The Caspian Sea is the largest enclosed body of water on the planet and Baku is its largest port . Azerbaijan is rich in petroleum products and oil drilling has polluted Baku and the Caspian Sea. The Hovsan Wastewater Treatment Plant is another source of pollution to Baku and the Caspian Sea. The treatment plant handles almost half of the capitols wastewater. The wastewater is only partially treated and then dumped into the Caspian Sea via pipeline. The result has made most of the beaches around Baku unusable. The area surrounding the treatment plant inland is also unpleasant because of the odor. In the past, recreation along the sea shore was the most popular recreation for the public and tourists. Today, many are surprised to hear this fact because the bay is so polluted from sewage(Gischler, 2000, p. 41). There is a project proposed to alleviate the shoreline pollution. The plan is to extend the length of the pipeline farther out into the Caspian so the currents will disperse and diffuse the effluent material into the sea and away from the beaches. The current system is so inadequate because of years of neglect that it can only hope to just catch up to its current needs in a few years time. The construction of the longer pipeline will cause some negative effects, but they pale in comparison to the present state of the littoral around Baku. Table 1 outlines the environmental impact projected from the construction of the pipeline. The construction of the outfall is still in the planning stages, but it is expected to start in 2011. Water Treatment In Kingston, Ontario The expansion of the Point Pleasant Treatment Plant in Kingston, Ontario is the focus of this half of the paper. Kingston shares with Baku the distinction of being on the shore of one of the largest inland bodies of water, Lake Ontario. Kingston is located in the province of Ontario in Eastern Canada. To the west is Manitoba, east is Quebec, north is Hudson Bay, and Lake Ontario is to the south.. The Point Pleasant Treatment Plant is a direct filtration facility that supplies the 118,000 people of Kingston with drinking water. The water is drawn from Lake Ontario and goes through a series of filters and chemical treatments before being piped into the main water supply. The Point Pleasant project proposes to double the water pumped in and treated from 40 MLD (mega litres per day) to 80 MLD. The increase is needed for the projected increase in population and expected changes in regulatory standards for drinking water purity. The EIA for the plants upgrade identifies the surrounding vegetation and trees as being vulnerable to harm from construction activities during the plants renovation. The Butternut tree is specified in the report as a major concern because it is already an endangered species. Other issues are the pollution of the ground water and soil erosion. Table 2 outlines the environmental impact from the upgrade of the facility. Kingstons treatment plants upgrade is one that shows the existing system is sound because it is for projected future use and not just getting the current system up to par. The many years of investments and planning regarding the water infrastructure have paid off so they do not have to â€Å"catch up† just to make the system function nominally. A strong infrastructure can mean less damage to the environment. Conclusion Environmental impact from city living is inevitable, but it can be minimized. It requires a firm commitment to good planning and major investments in clean technologies. Comparing the upgrade of the water treatment plant in Kingston and the plant in Baku illustrate the differences in the conditions of each citys water systems. Laws protecting the environment vary from country to country and it is evident that Azerbaijan had few such laws. Canada has much more stringent environmental protection laws than Azerbaijan. Although Kingston has a much smaller population, the larger cities of Canada have done fairly well protecting the environment. Unfortunately, a countrys wealth dictates the priority that can be given to environmental protection. Lower standards for the construction and maintainence of urban infrastructure increases the chances of environmental degradation. References Azerbaijan. (2010). In Encyclopedia Britannica. Retrieved May 23, 2010, from Encyclopedia Britannica Online Library Edition: http://www. library. eb. com/eb/article-44298 Baku. (2010). In Encyclopedia Britannica. Retrieved May 23, 2010, from Encyclopedia Britannica Online Library Edition: http://www. library. eb. com/eb/article-9011883 Gischler, Maarten A (2000, summer) â€Å"Beautifying the Bay† Azerbaijan International, 8(2), 40-42 Kingston. (2010). In Encyclopedia Britannica. Retrieved May 23, 2010, from Encyclopedia Britannica Online Library Edition: http://www. library. eb. com/eb/article-9045553 Townsend, Mike. (2002, July). BETWEEN TWO SEAS: Progress on the BTC Pipeline Project. Azerbaijan International, 10(3), 90. http://ezproxy. spl. org:2048/loginurl=http://proquest. umi. com/pqdweb

Discovery :: essays research papers

â€Å"If Christopher Columbus Returned to the ‘New World’ in the year 2000, what evidence of his discovery would he find?†   Ã‚  Ã‚  Ã‚  Ã‚  Christopher Columbus set sail August 3, 1492 in search for a new route to the West Indies. Sailing west from the Canaries, his ship was tossed around by trade winds, which ultimately guided his fleet off course. Due to his new route, Columbus came across land, which we know today as America. When Columbus arrived to the New World, he thought he had reached his required destination, the West Indies. Before setting sail to Spain, Columbus decided to leave 44 crewmembers in the new found land to start their own colony, which was successful.   Ã‚  Ã‚  Ã‚  Ã‚  If Columbus was to return to the â€Å"New World† in the year 2000, I think he would be very surprised with our success. There are many pieces of evidence that express our thankfulness for his discovery. The name Columbus lives on in rivers, nations, and cities. One large piece of evidence is Columbus Day. On this day, we show our appreciation to Columbus for all his discoveries, how thankful we are for his discovery of the ‘New World’. This day is considered a national holiday in the United States, many major companies, factories, and schools are closed.   Ã‚  Ã‚  Ã‚  Ã‚  Another major event that occurs in Columbus’ remembrance is the Columbus Day Parade. This is a parade that is held on Columbus Day in many different cities in honor of Christopher Columbus. Through this celebration we express how thankful we actually are. We show that he has a meaning in history, he is the explorer who was courageous, who was willing to risk his own life for his discovery, and when he could have turned back he didn’t, and it is his name we honor.   Ã‚  Ã‚  Ã‚  Ã‚  Besides holidays and parades, there are also landmarks that are named after Columbus. Like Columbus, Ohio, or Columbus, Georgia. These are just two of many landmarks named after him. Not only are there landmarks, there are also rivers named after him, such as the Columbus River, which people today know as the Scioto River. This river runs directly through the city of Columbus, and extends through Ohio into Kentucky and Indiana, then it eventually connects with the Ohio River. Many states have statues of Christopher Columbus centered within their cities. Americans look to Columbus as an explorer and a hero. He was the man who had enough courage to put his life, and the lives of others, in jeopardy.

Renaissance in the history of art

The Renaissance was much more than Just an episode in the history of art. The Renaissance gave birth to so many new ideas and styles beyond Just art, that are still being used today. Many of the greatest painters and architects rose during the renaissance era, such as Michelangelo, Brucellosis and Albert'. The Renaissance brought forth much more than Just art. The Renaissance gave birth to new talent and artwork that will forever be remembered in history. In the early years of Michelangelo, Brucellosis and the other great artists of this era, pursuing art was discouraged in the household.The adults saw it as a shameful career. Once these artist started showcasing their talents to the world, the view of art was changed to many. Artists gained new respect from the Europeans and were viewed as craftsman and useful to making goods. These artists inspired many with their work such as the Sistine Chapel and the Florence Cathedral. Also, architecture greatly contributed to this age of art. Alberta argued that buildings should mirror the human body in their supports and openings, which inspired many great artists such as Michelangelo.Much of the architecture during this era was created in this image of human likeness. Also, you can see the work of renaissance in modern day architecture. The Renaissance study of architecture came up with a grid pattern to lay out towns in a simpler way, which you can still see being used today. As you can see, there are many ways you can still see the Renaissance culture in modern day life. The Renaissance should not only be remembered for the art and talent it produced but the new ways and how culture changed as a whole.

Antigone Minor Character Essay

The play Antigone tells the story of one of Oedipus’ daughters standing up to the law in order to honor her brother. The story begins after Polyneices and Eteocles have killed each other and King Creon issues an edict forbidding the burial of Polyneices. In the prologue Antigone’s sister Ismene is introduced. Ismene while a minor character serves a great purpose in the play. In the opening lines of the play a dialogue is occurring between Ismene and Antigone. In lines 14-29 Antigone is telling Ismene of her plan to bury Polyneices even though Creon forbids it. Ismene tells her â€Å"We are only women; We cannot fight with men†¦. We must give in to the law†. Ismene’s refusal and fear of breaking the law serves to emphasize Antigone’s stubbornness and hardheadedness. In scene 2 when Ismene tries to take partial blame for the burial of Polyneices, Antigone refuses her. This shows Antigone’s pride for her actions and her protectiveness and loyalty to her family. Ismene is included to act as a foil to Antigone’s character. Where Ismene not included in the play, the play would not have such a great effect. Ismene represents the average women in this Greek society. Had her character not been introduced the reader would assume that all women in that society were as hardheaded and stubborn as Antigone. If Antigone would have represented the average woman the theme of loyalty to family would be lost. Through out the prologue Ismene refers back to the fact that they are just women and have no power against the laws or what is done about them. In scene 2 Creon is convinced that it was a man who buried Polyneices and not a woman this serves to verify the gender roles in Greek society. Ismene’s shy, hesitant, and reluctant behavior is typical of a woman of that society since after all they had no rights and were treated as property. In conclusion Ismene while a minor character serves the role of a foil to Antigone by emphasizing Antigone’s hardheaded stubbornness. She is included to show how typical women in Greek society acted and what they believed. If it weren’t for Ismene several themes in the story would not appear.

Ifeoluwakiisi Adejoorin Essays - Cultural Anthropology, Literature

Ifeoluwakiisi Adejoorin Essays - Cultural Anthropology, Literature Ifeoluwakiisi Adejoorin Professor Seifert ENGW 102 Sec 10 15 September 2017 Examination Malpractice in Nigerian Secondary Schools and the Involvement of Parents People used to be ashamed of going against the rules and regu lations. But, not anymore. It is as though those who are doing the right things are to be ashamed . "Die die nimu eledee fin wogba ", a proverb in Yoruba language which means that we should attend to small problems before they become big , comes to mind. If only we had been smart enough to a dhere to the words of this proverb , maybe examination malpractice wouldn't have become this popular. There was a time when people used to pride in their honesty, albeit it wasn't always profitable. Our values in Nigeria have been greatly degraded. What happened? In early years, parents had time to be parents and their children were their greatest legacies. Sadly, that's no longer the case in Nigeria. Everyone is chasing a career and economic gains. Of course, there's nothing wrong with such things. The problem is that these things are now more important than raising honest child ren. As a result, we have a society of educated rogues. There's only so much that a school or teachers can do to help her child who has not been taught from home. Indeed, the need for well-bred children, eventually adults, cannot be over emphasized. In the Yoruba culture, such an individual is referred to as " Omoluabi " which means one who is well brought up and is aware of his responsibilities to himself, his family and the society. The place of parents and parenting as unfortunately been taken by the media and outsiders. The parents say that they are working to secure a better future for their children. But, from what I've seen in schools, the future of these kid s as well as that of the country doesn't appear very promising. Th ey end up achieving the reverse . Whether consciously or unconscious, the results are not beautiful to say the least. By being overly career and wealth focused, these parents have exposed their children to the vices of the media. Unfortunately, they are not even there to help them filter the things they watch, read and listen to. We have also adopted a "it's not business attitude" where nobody corrects anybody if it does not have a direct impact on them. We simply shrug and say, "Oh well, it's not my business." Forgetting that in the future the entire society will reap the fruits and we are part of that society. I will be exploring the roles of parents in the increasing rate of examination malpractice as. To do so effectively, I will consider what point we are at and how we got here. I will also explore solutions to the prob lem of examination malpractice and the roles of parents towards solving a problem that they helped to create. However, I will face some challenges. For instance, as much parents as have a huge role to play in this problem, there are other causal agents that cannot be completely ignored. I hope to be able to to uch lightly on these others with out drifting away from my central theme. I am sure t Irrespective of the challenges, I intend to go on with my research because I believe that this problem is getting out of hand and must not be overlooked. The future of Nigeria is it stake and we must save it. This research will not only create awareness about the problem of examination malpractice but would also offer practicable solutions to help tackle this problem.

Who Is Jesus Essays - Christology, Prophets Of Islam, Free Essays

Who Is Jesus Essays - Christology, Prophets Of Islam, Free Essays Who Is Jesus Lee Bell Mr. Motes Religion 105 November 3, 2000 Who is Jesus? Hundreds of years before Jesus' birth, the Old Testament of the Bible recorded the words of the prophets of Israel predicting His coming. The Old Testament, written by many people over a period of 1,500 years, contains more than 300 prophecies describing His appearance. All of these details came true, including his miraculous birth, His sinless life, His many miracles, His death and His resurrection. The life Jesus led, the miracles He did, the words He spoke, His death on the cross, His resurrection, His ascent to heaven - all point to the fact that He was not merely man, but more than man. Jesus claimed, I and the Father are one (John 10:30), He who has seen me has seen the Father (John 14:9), and I am the way, and the truth, and the life; no one comes to the Father except through Me. (John 14:6). As we study Scripture and the life of Jesus, we realize that His Life and Message Cause Change. Jesus was born in Bethlehem in Judea, in the south of Palestine. He grew up in a very ordinary town, named Nazareth, located in Galilee, which was in the north of Palestine. Jesus was a carpenter, but at the age of 30, He became a religious teacher, moving from town to town. In Luke 4:14-22, we read what happened when Jesus began teaching. He went to the synagogue, which was the local place of worship. Although He probably had no more religious education than the average Jewish man, people wanted to hear Him. He was asked to speak at the synagogue in Looking at the life and influence of Jesus of Nazareth throughout history and you will see that Jesus Christ was in fact the living Son of God. He and His message always produce great changes in the lives of men and of nations. Wherever His teachings and influence have gone, the holiness has flowed. In my life he has been the biggest influence in my life and the people around me. I have never gone wrong when I have followed his teachings , and I never will as long as I live. He works in big ways and most of the time I dont understand but it is always for the good.