Diffusion Across Biological Membranes Essay Example for Free

Diffusion Across Biological Membranes Essay From the cell simulation modal made, it has explained about the aspects of diffusion and indicator solution (chemical testing) to test for particular substances. From the observation made, iodine and glucose have greater concentration due to small molecular size and also they are monomers. It means their molecules are smaller. Thus, it diffused out to create a state of equilibrium. On the other hand, starch molecules did not move by diffusion across a membrane into or out of the cell due to the large molecular side. This is because many repeated glucose subunits are found in starch structure. Starch is a polymer. This is the reason why the water in the beaker or 1 inch dialysis tube did not turn dark blue as no starch molecules diffuse out. However, the liquid outside of cell was cloudy. When iodine indicator and Benedict’s test, tested for presence of iodine and glucose respectively, the colour change was not very distinctive. Hence, we came to a rationale that more time could have needed for glucose and iodine achieve diffusion as 1 hour was not enough to complete as perhaps molecules on one side of a membrane become trapped by binding to macromolecule. On the other hand, perhaps water in the beaker could have been too diluted so could not detect the presence of glucose and iodine using indicators. This process is termed as osmosis. In osmosis, molecules also travel from higher concentration to lower concentration. However, osmosis only occurs in water. Water molecules are polar and small enough to pass through the membrane. Therefore, from this experiment, we can understand that water is essential for cells survival. However, too much of water will result in hypotonic. ells is placed with a lower concentration, then osmotic pressure of the extracellular fluid is less than intracellular fluid. As a result, water flow into the cell causing it to swell and undergo lysis (burst). Likewise, if a cell is placed into a solution with higher osmotic concentration than the intracellular fluid such as salt solution. The osmotic pressure of the extracellular fluid will exceed that of the intracellular fluid casing the cell to shrink and crenate. Hence, it’s hypertonic. This explains why when a small dose of fertilizer can enhance plant growth but over fertilization can kill the plant. Fertilization has salt and salt dehydrates the cytoplasm in the cell and would dry up making the cells shrivel up and die. Iodine indicators and Benedict’s solution proved that when a substance reacts with its indicator solution, a reaction will occur and cause a colour change. In this case, iodine test used to test for the presence of iodine in the solution and Benedict’s solution is use to detect glucose. It is important for Benedict’s solution to be heated as it’s a way to prove that it is the mixing of the two that creates the bright orange colour. If the benedict’s solutions were to be heated separately or the solution to be heated there will not be any results produced to test the presence of glucose. The indicator solution will react only if the substance is meant for is present, then it will react. Else there would not be any changes to observe. Indicators come in handy when dealing with unknown samples of ingredients to prove what a substance is. A negative control is used yield a negative result. This is to ensure that all the reagents are pure and there is no contamination that will give a false result. Conclusion In conclusion, we can conclude that diffusion occur spontaneously and molecular size and charges matters when molecule pass thought cell membrane unless its molecular size is small and it’s a monomer diffusion will occur spontaneously. However, if the molecular size is big and it might also hinders the passage way for smaller molecules to diffuse to a higher concentration to lower concentration to bring it to an equilibrium state. We also concluded that cell should maintain a isotonic environment to conduct its activity smoothly else in hypertonic or hypotonic, it will burst or shrivel and eventually kills the cell. Therefore, diffusion and osmosis are types of passive transport and happens spontaneously.

Needs in Different Life Stages Essay Example for Free

Needs in Different Life Stages Essay NEEDS OF THE DIFFERENT LIFE STAGES! Human Needs Needs: lack of something that is required or desired Needs exist from birth to death Needs influence our behavior Needs have a priority status Maslow’s hierarchy of needs Maslow’s hierarchy of needs( levels of need) Meeting Needs Motivation to act when needs felt Sense of satisfaction when needs met Sense of frustration when needs not met Several needs can be felt at the same time Different needs can have different levels of intensity Altered PhysiologicalNeeds Health care workers need to be aware of how illness interferes with meeting physiological needs Surgery or laboratory testing Anxiety Medications Loss of vision or hearing Altered PhysiologicalNeeds (continued) Decreased sense of smell and taste Deterioration of muscles and joints Change in person’s behavior What the health care worker can do to assist the patient with altered needs Summary Be aware of own needs and patient’s needs More efficient and quality care can be provided when know needs and understand motivations Better understanding of our behavior and that of others Summary Recognise that we are all different. Help them to help themselves and become more independent. Everyone has a choice Treat individuals with respect and dignity. Protect vulnerable individuals Different professionals are involved in care formal and informal care provision Summary Our five life stages are the early years, school age, young people in transition (from school to adult life), adults of working age, and older people. For each life stage we have identified the outcomes that everyone would want for themselves at that stage in life.

Nationalism During World War One History Essay

Nationalism During World War One History Essay World War 1, the conflict which submurged the world between 1914 and 1918 left a massive mark on the 20th century, and shaped the world in which we live in today. Never before has nation clashed with one another on such a grand scale. Advances in weaponry allowed for the killing of soldiers of vast numbers. When the war clouds finally cleared, monarchies had fallen apart. New nations were born and the seeds were planted for an even greater conflict to engulf the world. A major contributing factor to the tension between great powers that led to the outbreak of the First World War was called Nationalism. Nationalism led to the outbreak of the War when countries wanted to show themselves as the most powerful and advanced society on the planet. When countries started to get nationalistic, they became to see themselves as superior, as proud, as dominant, became very compulsive as many became too proud of their nations. When the assassination of Archduke Franz Ferdinand came about, thus tr iggered the World War and more and more countries started to get involve. The war changed the world and the society we live in today. During the 19th and 20th century, nationalism had spread itself all over Europe. All powerful nations such as Russia and Germany had strong beliefs towards the concept of supporting their own nation. When Nationalism was brought up, nations believed that their own needs must be met before those of other nations. These strong beliefs came to play a pivotal role as many nationalists became so proud of their nations that later on the nations that they struggled for it to become the richest and most powerful nation of all. The signal of national pride became a massive problem for the Austro-Hungarian Empire while they attempted to maintain order and peace within seize are of Bosnia. This power was put under threat due to the Slavonic peoples detest of the Austro-Hungarians and wanted themselves to be no longer part, and wanted to be a separate nation know today as Yugoslavia. The assassination of Archduke Franz Ferdinand and his wife was a major outcome of nationalism. The assassination of the Archduke Franz Ferdinand by Serbian nationalists was an event which was caused by numerous factors which produced widespread shock across Europe. The Archduke Franz Ferdinand and his wife Sophie were assassinated on the 28th of June 1914. The assassination occurred during the Archdukes visit to Sarajevo, the capital of Bosnia and Herzegovina. The Archduke was targeted due to the general feeling amongst Serbians that when he would have been appointed the throne, Ferdinand would continue the persecution of Serbs living within the borders of the Austro-Hungarian Empire. Just moments after the two had been shot; the authorities arrested the killer, Gavrilo Princip, a Serbian student, who was believed to have been linked to the Serbian terrorist organization, à ¢Ã¢â€š ¬Ã…“The Black Handà ¢Ã¢â€š ¬Ã‚ . After two days into the assassination, Austria-Hungary and Germany advise the Serbs that they should open an investigation to find the trail of the assassination . The Austrian government later on saw this as a chance to end the perceived threat from Serbia. Austria-Hungary issued Serbia with many ultimatums after the assassination, but nothing had changed. Afterwards, on the 28 of July, 1914, assured with German support, Austria had declared war on Serbia which swift shock and threat around Europe. Later on, Russia mobilized its armies in Serbiaà ¢Ã¢â€š ¬Ã¢â€ž ¢s defense, which triggered France to join in with the Russians and the French. Germany took this as an act of war against the Austro-Hungarians and mobilized their armies in large numbers on the Western Front. Germany had invaded France through Belgium which their neutrality had been protected by the British. Later on, this was an excuse for the British to enter the war and sent many troops to France. As the British dedicated that no one power should dominate Europe, particularly the coastline facing the British Isles. Germanys actions therefore, drew the British away from its colon ial ambitions and towards attempting to stabilize Europe. Although the assassination of the Austrian Archduke Franz Ferdinand triggered the begging of the World War, Europe has already been awaken up by the groups of nationalists and hatred been spread throughout Europe. On the other hand, many people had different views on how the Great War started. Many believed that the alliance system was the major cause of the World War. The alliance system is a group of nations joined together to support one another whenever backup is needed. Each nation made an agreement to support and help whenever their alliance calls out for help. In 1879, the Dual alliance which was made up of Germany and Austria, made another agreement with Italy, then was named the Triple alliance. France and Britain became allies in 1892, and later on Russia joined in. These three countries joined together and were called the Triple Entente, which was one of the most powerful set of alliance in Europe. Both alliances were very well armed and powerful, and when disagreement occurred within 2 countries, because of the alliance system, a small local war turned into the biggest war that our planet has ever seen. As Belgium was a land-locked country and was surrounded by the two alliances, B ritain agreed to protect it when a nation would declare war on them. After the assassination of the Archduke Franz Ferdinand, Austria declared war on Serbia. With the alliance system, countries declared war on each other as countries swore to protect their alliance system whenever war was about. To sum up, a small war between two countries spread all over Europe as alliances were made up to protect one another. To summarize, WW1 left a massive mark in the society we live in today. Many people had died from uncontrollable forces which were raging to show off their society. Nationalism triggered the World War as countries tried to show others what they were capable of. When nationalism spread itself around Europe, it angered many as many important figures were assassinated and left a massive mark which angered thousands. Nationalism led to the death of Archduke Franz Ferdinand when he selected a Serbian national holiday to parade through Sarajevo, stoking nationalist distaste. When Ferdinand was killed, as a symbol of hatred against Austria and Serbia, since countries were allied within each other, a small local war became the largest and most dangerous war our planet has ever seen. Besides the assassination of the Archduke, there was another major cause which many people believed in. The alliance system gathered societies together swearing that if any help is needed, the other societies that swore to help must do their best to achieve their responsibilities. When two countries clashed into each other, they called in for help and alliances took place shortly after. World War one has left an indulging mark on the 20th century that will never be forgotten , even thousands and million years later on.

A Flag for Canada Essay -- essays research papers

A Flag for Canada   Ã‚  Ã‚  Ã‚  Ã‚  The Canadian Government defines a flag as â€Å"a symbol to identify people belonging to a group.†   Ã‚  Ã‚  Ã‚  Ã‚  Canada has been a country for many years but has always lacked one thing. Up until 1965, we did not have our own official flag. The first thoughts of Canada adopting its own flag started in 1925. A Privacy Council committee looked at the possibilities but their work was never completed. This meant that the Red Ensign and the Union Jack would continue to represent Canada. In 1946 a committee was again formed to determine a national flag. Over 2,600 designs were submitted but yet again, no flag was picked.   Ã‚  Ã‚  Ã‚  Ã‚   In 1964, the Canadian government decided that they wanted a flag chosen before the ...

Rene Descartes Meditations on First Philosophy Essays -- Existence Go

Rene Descartes' Meditations on First Philosophy Rene Descartes’ third meditation from his book Meditations on First Philosophy, examines Descartes’ arguments for the existence of God. The purpose of this essay will be to explore Descartes’ reasoning and proofs of God’s existence. In the third meditation, Descartes states two arguments attempting to prove God’s existence, the Trademark argument and the traditional Cosmological argument. Although his arguments are strong and relatively truthful, they do no prove the existence of God. At the start of the meditation, Descartes begins by rejecting all his beliefs, so that he would not be deceived by any misconceptions from reaching the truth. Descartes acknowledges himself as, â€Å"a thing that thinks: that is, a thing that doubts, affirms, denies, understands a few things, is ignorant of many things† He is certain that that he thinks and exists because his knowledge and ideas are both ‘clear and distinct’. Descartes proposes a general rule, â€Å"that whatever one perceives very clearly and very distinctly is true† Descartes discovers, â€Å"that he can doubt what he clearly and distinctly perceives is true led to the realization that his first immediate priority should be to remove the doubt† because, â€Å"no organized body of knowledge is possible unless the doubt is removed† The best probable way to remove the doubt is prove that God exists, that he is not a deceiver and â€Å"will always guarantee that any clear and d istinct ideas that enter our minds will be true.† Descartes must remove the threat of an invisible demon that inserts ideas and doubts into our minds to fool us , in order to rely on his ‘clear and distinct’ rule. In constructing his argument for God's existence, Descartes analyzes several aspects of the nature of human thought. He begins by outlining the various types of thoughts we have, which include ideas, thoughts, volitions and judgments. Ideas, or images of ideas can only exist within the mind and are certain of existence. Volitions, or choices are firmly within the mind and are also certain. Emotions, such as love, fear, hate, all exist in the mind and are certain as well. Judgments involve reference to effects outside the mind and are subject to doubt. Therefore, judgments are not certain and distinct. Descartes believes that images, volitions, and emotions are never false but it is our judg... ... God alone remains; and, given the truth of the principle that whatever exists has a cause, it follows, Descartes declares, that God exists we must of necessity conclude from the fact alone that I exist, or that the idea of a supremely perfect – that is of God – is in me, that the proof of God’s existence is grounded in the highest evidence† Descartes concludes that God must be the cause of him, and that God innately implanted the idea of infinite perfection in him. Descartes second argument for proving God’s existence is very straightforward. He has four possibilities that created his existence. Through process of elimination he is left with God being his creator. Descartes succeeded in some parts of his proof for the existence of God, but failed in proving God’s existence from a logical point of view. Most religions prove that anybody can be right in his own description of existence of God. So, Descartes is right in his own way, but to others to accept his idea is totally up to them. No one is certain that God exists. Although there are many causes that could make one believe God is for certain, those causes which might be perceived, does not necessarily make them true.

Art :: essays research papers

I. Reading Clive Bell Sometimes I wonder about Clive Bell. After all, the man was obviously no fool. On the contrary-his every credential, every little detail of his career tells us otherwise: his life as the brilliant young student educated at Trinity College, hob-nobbing with other future intellectual heavyweights such as Lytton Strachey, Sydney-Turner, Leonard Woolf; the young scholar (described by friends as being „a sort of mixture between Shelley and a sporting country squire ¾) who, along with Thoby, Adrian, Virginia (later Woolf) and Vanessa (later Bell) Stephens, was to become part of the very core of „Old Bloomsbury ¾; the eminent art critic who proved crucial in gaining popular acceptance for the art of the Post-Impressionists in Great Britain-all of this serves as an almost overwhelming body of evidence pointing to the fact that this man was an intellectual of the very finest water. For myself, however, the above also serves to add a measure of urgency to this question: why do I find myself in almost constant disagreement with practically everything that Clive Bell has to say about art? I am inclined to say that it has something to do with the fact that, for him, it is not „art ¾-it is Art, art-with-a-capital-à ¥a ¼, so to speak. What I mean by this will be made plain through a discussion of his main book on the topic, (the very imaginatively titled) Art. Bell starts by postulating that there is but one kind of emotional response to all works of art, or at any rate to all works of visual art. This is what he calls the „aesthetic emotion ¾; it is intrinsic to both the appreciation and creation of art, and it is a response triggered by what (according to him) all works of visual art have in common: „significant form ¾ (which is a concept that I ¼ll have more to say about later). True, he says, different people respond differently to the same works, but what matters, according to him, is that all of these different responses are not different in kind. For according to him „all works of visual art have some common quality, or when we speak of à ¥works of art ¼ we gibber ¾. This extraordinary statement is to be found on page 6 of the edition of the book that I have before me-and here, already, I find myself in disagreement with Mr. Bell. In his statement of the case, is there any logical reason to believe that we do not gibber?

Brand Positioning and Repositioning

Research Proposal # 1 Name of The Research Proposal: Brand Positioning & Repositioning Brand Positioning In marketing, Positioning has come to mean the process by which marketers try to create an image or identity in the minds of their target market for its product, brand, or organization. Generally, the Brand positioning process involves: 1. Defining the market in which the product or brand will compete (who the relevant buyers are) 2. Identifying the attributes (also called dimensions) that define the product ‘space' 3. Collecting information from a sample of customers about their perceptions of each product on the relevant attributes 4.Determine each product's share of mind 5. Determine each product's current location in the product space 6. Determine the target market's preferred combination of attributes (referred to as an ideal vector) 7. Examine the fit between: oThe position of your product oThe position of the ideal vector 8. Position. Characteristics of Brand Position ing Brand positioning strategy is important to develop in order to get to number one in a customer's mind for your products or services. If you don't develop a plan, customers won't think about you when they go to make a purchase.This is sure to lead to low sales and, ultimately, business failure. Here are some characteristics of brand positioning strategy that anyone can use for business: Unique Benefits What benefits does a customer gain from buying your product or services? It's not enough to develop a generic benefits list that all of your competitors offer. What unique benefits do you offer? This takes diligent research of the competition, as well as prospective customers. Your brand positioning strategy has to revolve around your customers, and what they will benefit from a relationship with your business.Otherwise, they'll go to the competition, where they perceive they can get the most for their money. Quality Products or Services The Internet has made it easy for customers to get low prices, and harder for you as a home based business owner to beat larger competitors. However, you can still occupy a higher position over large service firms and product stores by building a brand image that highlights quality products or services. For example, if you're a freelancer, you may not be able to compete on price with freelancers from other countries.However, if you're known as a freelancer who offers quality services, you'll gain a higher brand position than low-priced competitors. You might even be able to charge higher prices for higher quality services, and the higher price may help build that perception that you're offering quality, whereas your competitors are not. Great Features You need to think through the features of your products or services that would make customers choose you in the first place, and use it in all of your advertising strategy. Take the time to write a product or service description for everything you offer.Cross out the ones that d on't meet the threshold of a great feature. Even if you only have one or two points about your product or service that qualifies, you can use that to differentiate yourself from the competition and boost sales. For example, if you're selling a home security system on Ebay, it's not enough to highlight the fact that it comes with 4 cameras and a DVR. Every similar home security system does, and your customers have no reason to buy from you, rather than someone else on Ebay. However, you could highlight that the security system ends images in real time to your email. Now your product is more compelling to consider, and you'll get more sales, even from a competitor that offers a cheaper price. Problem Solver A brand positioning strategy that works well, especially during hard economic times, is positioning yourself as a problem-solver. You want to focus on offering the very best solutions for the problems your target market faces. Your customers will associate your ability to problem-s olve with your ability to save them time, money and pain, which will keep them with you and not the competition.When you use these major characteristics of a brand position strategy, you can improve sales and your financial bottom line. If you don't take the time to work on a strategy, your business won't do as well, and your marketing efforts will be counter-productive. Types of beverage Water Drinking water or potable water is water of sufficiently high quality that it can be consumed or used without risk of immediate or long term harm. In most developed countries, the water supplied to households, commerce and industry is all of drinking water standard, even though only a very small proportion is actually consumed or used in food preparation.Over large parts of the world, humans have inadequate access to potable water and use sources contaminated with disease vectors, pathogens or unacceptable levels of dissolved chemicals or suspended solids. Such water is not potable and drinki ng or using such water in food preparation leads to widespread acute and chronic illnesses and is a major cause of death in many countries. Reduction of waterborne diseases is a major public health goal in developing countries. Alcoholic beveragesAn alcoholic beverage is a drink that contains ethanol, commonly known as alcohol (although in chemistry the definition of â€Å"alcohol† includes many other compounds). Beer has been a part of human culture for 8000 years. [1] In Germany, Ireland, the United Kingdom, and many other European countries, drinking beer (and other alcoholic beverages) in a local bar or pub is a cultural tradition. [2] Non-alcoholic beverages Non-alcoholic beverages are drinks that usually contain alcohol, such as beer and wine, but contain less than 0. 5% alcohol by volume.This category includes low-alcohol beer, non-alcoholic wine, and apple cider. Soft drinks The name â€Å"soft drink† specifies a lack of alcohol by way of contrast to the term à ¢â‚¬Å"hard drink† and the term â€Å"drink†, the latter of which is nominally neutral but often carries connotations of alcoholic content. Beverages like colas, sparkling water, iced tea, lemonade, squash, and fruit punch are among the most common types of soft drinks, while hot chocolate, hot tea, coffee, milk, tap water, alcohol, and milkshakes do not fall into this classification.Many carbonated soft drinks are optionally available in versions sweetened with sugars or with non-caloric sweeteners. Hot beverages A hot beverage is any beverage which is normally served heated. This may be through the addition of a heated liquid, such as water or milk, or by directly heating the beverage itself. Some examples of hot beverages are: †¢Coffee-based beverages oCafe au lait oCappuccino oCoffee oEspresso oFrappe oFlavored coffees (mocha etc. ) oLatte †¢Hot chocolate †¢Hot cider oMulled cider †¢Gluhwein †¢Tea-based beverages oFlavored teas (chai etc. ) o Green tea oPearl milk tea oTea Herbal teas oYerba Mate †¢Roasted grain beverages oSanka Miscellanea Some substances may be called either food or drink, and accordingly may be eaten with a spoon or drunk, depending upon their thickness and solutes. †¢Buttermilk †¢Soup †¢Yogurt Beverage industries in Bangladesh Bangladesh Beverage Industry: In Bangladesh the beverage industries are playing a great role in the economy. The beverage industries involves those companies and products that are given below, The soft drinks market in Bangladesh consists mainly of seven companies. 1. Abdul Monem Limited (Coca-Cola, Sprite, Fanta). . Agriculture Marketing Company Limited (Pran). 3. Akij Group (Mojo, Lemu, Frutika). 4. Global Beverage Limited (Virgin). 5. Globe Soft Drinks Limited (Uro Cola, Uro Lemon). 6. Partex Beverage Limited (RC Cola, Lychena). 7. Transcom Beverage (Pepsi, 7up, Mirinda). Of these, Pran and Mojo are the only local brands. Coca-Cola, with its three varieti es, namely, the cola-flavored Coca-Cola, the clear-flavored Sprite and the orange-flavored Fanta, is the number one soft drink producer in Bangladesh, as well as all over the world. Closing in on Coke is rival Pepsi.Pepsi is one of the oldest brands in Bangladesh. Pepsi first arrived in Dhaka in 1976 with the cola-flavored Pepsi, the clear-flavored 7up, the orange-flavored Mirinda and later introduced the mango-flavored Slice. Pran, on the other hand, started with jam, jelly and pickle. In 1995, it started producing mango bottled juice, and is currently operating all over the country. Virgin is renowned worldwide through its brand name. It was introduced in our country by Global Beverages Ltd. RC Cola entered the Bangladesh market in 1997, and was the first to introduce the cloudy lemon flavor.It has not been long since Akij group brought out Mojo and Lemu. They have already gained huge popularity. The recent success of Akij group is Frutika, which delivers the promise of no preserv atives. Characteristics of beverage that constitute brand There should have some unique characteristics of particular product to constitute as brand in the market. A product should have some feature that gives value to the consumer. Brand attributes consist of ‘bits’ of information that are linked to a brand name in consumer memory and that, when combined with the brand name, make up brand’s image.Product attributes are the benefits of products, and these Benefits are the surface means used in advertisement and promotion offer to connect the brand with a motivation which influence brand attitude. Perceived quality is defined as the consumer's judgment about a product's overall excellence or superiority. Attributes, Taste/Flavor, Digestion, Calorie Content, Sugar Content, Pungency, Price, Color, Hygiene, Brand Image and Power of Freshness were taken into consideration for constituting brand.