Osmosis Diffusion Lab Report Essay Example

Osmosis Diffusion Lab Report Paper Kinetic energy, a root of energy stored in cells, causes molecules to hit into each other and move in new directions. Diffusion is the result of this contact. Diffusion is the random movement of molecules to an area of lower concentration from an area of higher concentration. Osmosis is a type of diffusion. This is the diffusion of water through a selectively permeable membrane from a region of higher water potential to a region of lower water likely. Water potential is the measure of free energy of water in a solution. A living system also contains an active transport to make movement of particles like ions that move against their concentration gradient. The energy source ATOP is used during this process to move the particles across the cell membrane. This experiment takes place to measure the diffusion of small molecules through dialysis tubing. This tubing acts as a selectively permeable membrane, allowing larger molecules to pass through, but slowly. Dialysis is the movement of a solute through a selectively permeable membrane. When the two solutions on either sides of the membrane re equal and no net movement is detected, the solutions are isotonic. This means that the solutions have the same concentration of solutes. If two solutions differ in the concentration of solutes that each has, the one with more solute is hypersonic. The solution that has less solute is hypotonic Apparatus: Experiment 1: Diffusion 1. Elodea plant 2. Zipper plant 3. Hypotonic solution 4. Hypersonic solution 5. Light microscope Experiment 2: Osmosis 1. 4 slides 2. Potato Experiment 3: Ferrous 1. Ferrous Sulfate 2. We will write a custom essay sample on Osmosis Diffusion Lab Report specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Osmosis Diffusion Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Osmosis Diffusion Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Potassium Africanized 3. Slides 4. A Ruler Procedure-Data * We, as a group, needed two potato slices, water, and a salt. Was dropped into the tap water and the other slice into the salt. Potato slices to stand in the bowl for a minimum of 30 minutes. Nothing happened to both potato slices. * A potato slice * Allow the * At O minute * After 10 minutes, the potato in water (hypotonic) became puff up and firm. * The potato in Nasal got smaller and wet. * After 20 minutes, the results of both potato slices were the same as 10 minutes results. At 30 minutes the potato in hypotonic became rigid.

Renaissance Art History essays

Renaissance Art History essays The transition from the Middle Ages to modern times between the fourteenth and sixteenth centuries is referred to as the Renaissance, which originated in Florence, Italy. During this time, Italian artists studied the art of the Greeks and Romans, whom they learned a lot from. The Italian artists had hopes of rekindling the spirit behind Greek and Roman cultures, referred to as classical antiquities. The Renaissance artists were the main spark behind the rebirth of both cultures. Renaissance humanists emphasized the classical studies along with the restudy of the culturalist ideals and forms. With the combination of wealth and dominant connections, the Medici family soon began to make their presence known early in the fifteenth century of the renaissance. The Medici family were among the more powerful supporting leaders of humanism. The Medicis influence along with few members of the house that supported patrons of the arts, literature, and learning, are what helped establish Florence as one of the richest repositories in Europe. During the high Renaissance, art became a way for some to make a living. Artists were creating ways to show their humanistic ways and views. The same artists could often times get a better understanding of the renaissance in their own paintings. One important artist of the high Renaissance is Leonardo da Vinci, who presents the High renaissance dichotomy better than any other artist of that time period. Leonardo worked for a military weapon engineer, but still managed to continually paint creations of ideal beauty during the high renaissance. After his brief job with the military weapon engineer, Leonardo attained a better understanding of the evil nature of a man. Another important artist is Raphael, who composed the balance and harmony of the high Renaissance. Throughout the Renaissance time period, Raphael designed many churches, palaces, and even mansions. His interpretation of classi...

The Life and Achievements of Albert Einstein

The Life and Achievements of Albert Einstein Legendary scientist Albert Einstein (1879 - 1955) first gained worldwide prominence in 1919 after British astronomers verified predictions of Einsteins general theory of relativity through measurements taken during a total eclipse. Einsteins theories expanded upon  universal laws formulated by physicist Isaac Newton in the late seventeenth century. Before EMC2 Einstein was born in Germany in 1879. Growing up, he enjoyed classical music and played the violin. One story Einstein liked to tell about his childhood was when he came across a magnetic compass. The needles invariable northward swing, guided by an invisible force, profoundly impressed him as a child. The compass convinced him that there had to be something behind things, something deeply hidden. Even as a small boy Einstein was self-sufficient and thoughtful. According to one account, he was a slow talker, often pausing to consider what he would say next. His sister would recount the concentration and perseverance with which he would build houses of cards. Einsteins first job was that of patent clerk. In 1933, he joined the staff of the newly created Institute for Advanced Study in Princeton, New Jersey. He accepted this position for life, and lived there until his death. Einstein is probably familiar to most people for his mathematical equation about the nature of energy,  E MC2. E MC2, Light and Heat The formula  EMC2 is probably the most famous calculation from Einsteins special theory of relativity. The formula basically states that energy (E) equals mass (m) times the speed of light (c) squared (2). In essence, it means mass is just one form of energy. Since the speed of light squared is an enormous number, a small amount of mass can be converted to a phenomenal amount of energy. Or if theres a lot of energy available, some energy can be converted to mass and a new particle can be created. Nuclear reactors, for instance, work because nuclear reactions convert small amounts of mass into large amounts of energy. Einstein wrote a paper based on the  new understanding of the structure of light. He argued that light can act as though it consists of discrete, independent particles of energy similar to particles of a gas. A few years before, Max Plancks work had contained the first suggestion of discrete particles in energy. Einstein went far beyond this though and his revolutionary proposal seemed to contradict the universally accepted theory that light consists of smoothly oscillating electromagnetic waves. Einstein showed that light quanta, as he called the particles of energy, could help to explain phenomena being studied by experimental physicists. For example, he explained how light ejects electrons from metals. While there was a well-known kinetic energy theory that explained heat as an effect of the ceaseless motion of atoms, it was Einstein who proposed a way to put the theory to a new and crucial experimental test. If tiny but visible particles were suspended in a liquid, he argued, the irregular bombardment by the liquids invisible atoms should cause the suspended particles to move in a random jittering pattern. This should be observable through a microscope. If the predicted motion is not seen, the whole kinetic theory would be in grave danger. But such a random dance of microscopic particles had long since been observed. With the motion demonstrated in detail, Einstein had reinforced the kinetic theory and created a powerful new tool for studying the movement of atoms.

Position Paper Essay Example | Topics and Well Written Essays - 1000 words

Position Paper - Essay Example This in a way is a debate of nature vs. nurture. The fact is that some of these differences are strictly biological whereas others can be influenced by the environment children are raised in. People’s mental and emotional performance as adults has a strong connection to their parents perceptions of their genders during their childhood. Although many parents in the contemporary society tend to provide their children with the same kind of upbringing without any distinction on the basis of gender thus educating them alike and offering them same opportunities of play and recreation, yet prejudice ultimately causes them to restrain the physical activity of their daughters unconsciously. The way children and their behavior is perceived by the parents shapes the way they treat their children as well as the experiences children are given. â€Å"Since life leaves footprints on the very structure and function of the brain, these various experiences produce sex differences in adult beha vior and brains—the result not of innate and inborn nature but of nurture† (Begley, 2009). Parents raise their children with definite perceptions that instill in their personalities over time. Daughters are raised with this perception that they would have to leave the home one day to live with their husbands. This perception is inculcated in them that shyness, delicacy, and cleanliness are the expected behaviors and/or traits from them. On the other hand, boys are raised with the perception that they would have to earn and support the family one day and that the expected traits of them include physical strength, aggression, and smartness. Understanding these overt or hidden messages received repeatedly from their parents, children start working toward attaining these goals, thus developing differences across genders over the passage of time. Although parents may influence the mental and emotional performance of their children, they have no control over their physical de velopment. Parents having only daughters in the conservative societies where women are not empowered have a tendency to raise at least one of the daughters as a son. This concept is frequently captured in many movies and newspapers frequently. Even recently, a Saudi woman named Saliha disguised herself as a man with consent of her father in order to be able to become a bus driver and earn some money to assist her family financially, news reported in Al-Sharq Arabic Newspaper. Saliha said, â€Å"I live with my parents and four sisters and our conditions are very difficult†¦ I looked at [my father’s] poor health condition and advanced age and I requested him to allow me to replace him, especially that I was a good driver† (Saliha cited in â€Å"Gender no bar†). Even in such cases, the parents might develop a greater level of comfort between their daughter and men in the society so that their daughter can interact with them without hesitation that typically pe rsists between men and women during interaction, yet they cannot change her biological features. Such characters in the movie are overly dressed in baggy clothes to hide the curves and artificial moustaches are applied on the face. In spite of the obvious link of the physical differences of men and women to biology, biology alone is not responsible for other physical behaviors that are displayed by men and women e.g. their susceptibility to diseases. â€Å"Rarely does biology act alone to determine health inequities. Social

Urban Nomadism - Tecno Nomadism - Neo Nomadism Thesis

Urban Nomadism - Tecno Nomadism - Neo Nomadism - Thesis Example A nomadic life can give you every freedom you wish to access in life. There is no tension about office work, boss firing and other daily tensions. Driving out to the open road is not a mere imagination now and it has turned to be a reality with the technology favoring the aspiring generation. In this urban environment, an individual or a family has the right to choose nomadism as their culture and it is appreciable and acceptable in this mobile world. However, nomadic lifestyle is considered as an uncivilized way of living by the sedentary society. What could be the reason behind this? There might be different reason for people to switch over to this type of living style. Some of us consider the style during the retirement life, this is the time when we wish to be free from homely tensions and want to enjoy life. Another group of people are those who are homeless and have no other option than choosing nomadic life, also fly out to road. However, the case is different with modern noma ds, who also consider about earning, living, saving as well as connecting to people along with enjoying the fun on being free. Nomads love to have freedom, fun and more space for relationships and want to stay away from day to day tensions. Luckily, the present day technological efficiency has made it easy for anyone to be anywhere both virtually as well as physically at any time and thus, techno nomadism is a reality. Though, the life of nomads are filled with fun and adventure, they need to face numerous challenges primary areas that influenced the modern nomads are the prototype of free venture and marketing that offers a better economic prosperity. However, the initial point that arises in a nomadic mind is the transportable tools and environment. What are the best types of transportable tools that are ideal for a modern nomadic lifestyle? As a solution to this haunting question, a wide study is performed and discussed here. The most wonderful point of discussion is the architec tural creativity that made a space for easy transportation and survival for the modern as well as the post modern nomads. This paper purely talks about the emergence of neo nomadism with respect to the technological effects and the means of leading a nomadic culture. The significance of nomadic atmosphere and architecture suitable for a modern, comprehensive and rapidly growing mobile community is studied and discussed. A thesis focusing on the methods and architectural problem associated with a modern nomadic lifestyle is included. The tools that are crucial and adjustable to a logical transportable environment are studied while focusing on a hybrid infrastructure, service and efficacy. It also discusses the perfect solutions and the effective utilization of simple architectural tools and construction techniques to lead a modern nomadic life. Along with a simple transportation, easy construction and wonderful nomadic lifestyle, a person also needs to consider the chances of a great earning. This can be achieved to specific tools and effective communication networks. Excellent ideas and solutions are discussed here that can help the nomads overcome all the challenges related to transportation, communication and earnings. Now, let us see how nomadism is ruling this modern world and how the nomads are overcoming the challenges that face during their adventurous life. 2. LITERATURE REVIEW Ancient world witnessed the nomadic culture

Into The Wild, by Jon Krakauer :: Into the Wild Essays

The tone is set in this chapter as Krakauer uses words to create an atmosphere of worry, fear, and happiness in McCandless’s mind. â€Å"The bush is an unforgiving place, however, that cares nothing for hope or longing†(4). McCandless is on the path of death, which creates worry and fear for the young boy. â€Å"He was determined. Real gung ho. The word that comes to mind is excited,† (6). Alex is very excited and care free, which Krakauer used to his advantage in making the tone of Alex’s mind happy. The author creates tones to make the reader feel the moment as if the readers were sitting there themselves. Krakauer uses dialogue and setting to create the mixed tones of this chapter. As one can see from the quotes and scenery the author uses tones that are blunt and are to the point to make the reader feel as though the emotions are their own. Krakauer uses plenty of figurative language in this chapter. He uses figurative language to support his ideas,t o express the surroundings, and tone around the character. To start the chapter he uses a simile describing the landscape of the area, â€Å"†¦sprawls across the flats like a rumpled blanket on an unmade bed,† (9). This statement is used to make reader sense the area and set the mood for the chapter. The use of figurative language in this chapter is to make a visual representation in the readers mind. â€Å"It’s satellites surrender to the low Kantishna plain† (9). The personification is used in this phrase is to make the reader believe and feel that the location is far away and so far that technology surrenders to mother nature. It is important for the reader to be aware of the distance that is so far from civilization. A lot of epigraphs used in the book also show figurative language. â€Å"The land itself was a desolation, lifeless, without movement, so lone and cold that the spirit of it was not even that of sadness†(9). Jack London is mentione d quiet a bit in this book and he also uses many forms of figurative language. The personification used above in the epigraph was meant to seem that the land was empty and had no life going on. â€Å"Wisdom of eternity laughing†¦Ã¢â‚¬ (9), is also personification that can suggest to the reader that the end of forever will never happen and so eternity is mocking everyone in its path of destruction.

Sometimes It Snows In April

It was just another typical evening at Silver Town. Rowan, Shannon, Reeve, and I were five friends from Madison high and we were driving past Rose Hall (the famous haunted house) on that Halloween evening. The house lay in ruins. Not a single soul had lived in it for over fifty years. There, it stood, alone in the hills, rising from the green cane fields. There were no other houses near by. It stood there day and night, all alone. Every one said the devil lived there and that anyone who slept in the house will die violently and mysteriously or survive, hopelessly insane. Nevertheless people did go into the house from time to time. We all went in as well but that was in broad daylight, of course. We visited the grand rooms and we went down the back staircases to the cellar, where Annie Palmer used to practice black magic and where the dark brown stain that was said to be the blood of her last murdered husband. Rose Hall was not a nice place at all. Even in bright sunshine the windows were broken and black with dust and grime. Every Halloween night the five of us, oh sorry I forgot to mention Mace, he has a record for violent disorder, well to me he has†¦. it as 2 years ago on an Autumn evening me and Mace went down to the new arcade arena, and for nothing Mace beat up a young boy in the toilets, I had to hold him back. Mace has always been a bit odd and he always picks on people for no reason. He may be a mad person, but he sure is my friend. Anyhow back to the story†¦ the 5 of us went down to our high school where other friends would come, and we used to have a Halloween party, sometimes everyone used to dress up as vampires and other weird things. But really, we use to get together with everyone and play games, sit around telling horror stories and mostly for fun. On that night we turned up to the party quite late and found every one busy playing games and talking. We walked in and found a round table near the corner and went to sit down. Just when we were all starting to get bored Shannon came up with the idea about playing truth or dare. We started to play and that's when all the trouble started to come. We all wrote out our separate dares on pieces of white paper, folded them and placed them in a vase. We picked out our dares. First Rowan, then me, Mace after, followed by Reeve and then Shannon. One by one every one started to leave as it as getting quite late and it was only the five of us left and with one or two people that were on the other side of the hall. It all started when it was Shannon's dare, I could tell it was something bad by the look on Mace's face. Shannon's dare was to go to Rose Hall, knock on the door and say trick or treat. At first we all thought that it was a very good idea and that we should all go trick or treating. It was really dark with hardly any one on the streets. All the little children had gone home and nearly all the lights were switched off. We drove up slowly and we could see the dark deserted house all there lone and it felt as though it was waiting for us. For some strange reason the journey up the hill seemed to take years and what more it was starting to rain, and not only that Mace was driving. It started to thunder and lightning struck, and then it looked at us, smelled us, it was as though the lightening and the fear from it was its light. The house never looked more evil, every film, nightmare, anything scary that makes me want to run under my parents covers when their not there flashed before my very eyes, It gave me the shivers and I felt that something inside was telling me; This is not right; turn back, evil dwells here†. These words were running through my head over and over again. At that moment I remember Reeve calling me. I told them to turn back the car in a very quiet voice. They all looked at me as though I was stupid or something. Then Reeve asked me what was wrong for the second time, but this time I didn't bother as I was starting to get really scared. Nobody was listening to me. I thought they were all thinking I had gone mad. Just then I heard a whisper saying `I can't turn the car'. Straight away I looked at Mace's face. I heard him say it again to the four of us. This time he said it in fear. We all went silent staring ahead. The only sound to be heard was the rain. It was getting louder and louder as we drew closer and closer to the grim Rose Hall. In a flash we were there. It was dark. The rain had stopped now and I could feel a cold breeze rushing past my face; it did not feel like the normal winter breeze, it was a shivering breeze, an evil, deathly breeze. Shannon walked towards the door slowly. We followed behind her and it felt as though each step that we took towards the door was the last. `Knock, knock' We felt the sound vibrate in the silence surrounding us. At this instant I grabbed Mace's arm with the thought that something was going to open the door. We waited and waited till we all felt relieved that nothing was there to let us in. We all turned back with the intention of leaving, but just then we heard the door start to creak open slowly. Before we even had the chance to look back Shannon, had gone and we heard it. We heard the faint scream for help. My legs started to shake, I was weak, I felt as though I was at a funeral, my heart was soft, and I could feel it beat, it was fast. The tears were there. Rowan screamed and then she urst into tears and fell down on her knees. We could feel the silent night looking down at the four of us, helpless, knowing that there was no turning back now, but only to face the fear ahead of us. It felt like as though we were in the part of a film, a funeral, everyone crying, sad music at the background, everywhere you look there was sorrow. The door was left there wide open for us, and we knew that there was no way out. We made the final decision that we had to go into Rose Hall and find Shannon. We went in pairs: me and Mace, Rowan and Reeve. We all had the fear hidden inside us, but outwardly we showed raveness as we stepped into the forbidden house. As we walked in, we found our selves in the middle of the hallway with only two straight narrow paths ahead of us that were never there before. Looking at these paths we knew that one of these path would lead us home where as one would lead us to another world, the world we did not want to enter, the world contradicted by hope, but we did not know which was which. Mace and I decided that we would go right, but Reeve and Rowan wanted to go the same way as well. We sensed that we only had a short period of time and we had no time to argue, so I ecided that Mace and I should go left and let the other two go right. As we approached our paths we all turned around at the same time, and looked at each other, thinking that it's the last time. I ran towards Reeve and my closest friend, Rowan, and gave them both a big hug, which felt to me as if it was bringing back all the memories of the five of us together with smiles on our faces. I felt Mace's warm hand around my shoulder drawing me away from Reeve and Rowan. I remember Mace telling me that there was nothing we could do, except to face what was coming, we did not have a choice because, the door ad closed behind us. I managed to pull my-self away from both of them. We said good-bye to each other for the final time, and we started to walk. Our footsteps sounded very loud on the wooden floor. Everything smelt damp and moldy and there was silence as if many ears were listening to our footsteps. I felt as though I had been walking for many days without stopping, not realizing how much pain I was in, but instead realizing the fear. Mace and I started to walk faster, after a couple of minutes or probably hours, I began to feel as though I was reaching destiny, only not knowing what it was. Mace suddenly stopped. He grabbed my hand and pulled me back. We stood there for a couple of minutes and then we heard two screams. At first I did not want to believe what I had heard but I had to and I decided to go back for them. I didn't know what was going through my head; I started to run as fast as I could until I tripped over something and for a minute I thought I was dead. I was sitting there when I felt something dripping on me. It was really dark which meant I couldn't see what it was, but I decided to smell it. It smelt weird. It smelt like blood. Just then I let out the oudest scream that I had ever screamed in my whole entire life. I heard Mace's footsteps coming towards me as yet I did not look up. He came and sat next to me. I remember Mace whispering in my ear and asking me what was wrong. I told him I felt something dripping on me and it smelt like blood. Mace smokes, so he always carries a box of matches' in-case his lighter never worked. We were both sitting there and it felt as though we had given up hope. Mace took a cigarette out of his pocket and a box of matches to light the cigarette. When the fire flicked on the match something took it out. I started to get really scared; I knew something or someone else was in there apart from the both of us. I sat there silently, trying my hardest not to make a move, I even held my breath, and although it was dark, I closed my eyes. Those couple of seconds felt like a couple of hours. He flicked his match again and this time the flame did not go out. He looked around to see if anything was there, but he couldn't find anything. Just then he felt something drip on him. He looked up slowly. I remember him being quiet for a long time until I looked up. It was a horrible site, a photographical site and memory, and I hate hinking about it. I was too shocked to cry or even say anything. I could feel my heart beat getting faster and my body getting cold and hot and cold and hot. It was Shannon. She was covered in blood, her eyes red and wide open, her mouth also open with her tongue sticking out, accompanied with her ever slow blood flowing to the end of her tongue where it built up only to drip, there was blood all over her body, and there was only distinguishable as a pole trusted in her belly, flowing with blood, holding her, supporting her to the ceiling. She was a mess. All hope that I ever had was lost, it felt like a child getting its ost awaited toy and only after getting it, it was taken away, I felt what the people walking aimlessly in the desert with a dry throat felt, after running with joy at the first site of water only to discover it was a mirage. We couldn't do anything apart from walking ahead. Every step felt like the last one. We walked and walked in total darkness, with the presence of our recent memories until our legs couldn't carry us any longer so we both had to sit down. I put my head down and I remember thinking about what my family was doing and what time it was. Just then Mace told me to look up, he told me that e reached it; he told me that we have reached our destiny. Without saying a thing I stood up in amazement, speechless. â€Å"Mace, Shannon, Rowan, and Reeve we're home†Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ â€Å"Darling, wake up†. I opened my eyes so many people, my own people. `I'm home, I'm home†¦ Where are the rest where are they? ‘ `I'm sorry darling. They†¦ , they died in the car accident. Thank god that you survived'. From that day to this I don't know how we ended up in the car accident, and I don't know why I came back but Mace didn't. Every time I drive past Rose Hall I hear the screams of Reeve and Rowan and still see the body of Shannon. Twenty-five years have passed and things have changed in the outside world, but I have not changed. For me my past is still living and haunting me. I have still not yet uncovered the mysteries of that night in Rose Hall. It's a normal evening at Silver Town. Halloween night has come back to me again. And as I'm driving towards Rose Hall I hear again the same voice, the voice that I once heard twenty-five years ago but this time it is saying `Come†¦ come†¦ come'. I still don't know if Mace lied when he said he couldn't turn the car around, but I do believe that he is still alive and I am going back for him†¦Ã¢â‚¬ ¦..