Resolution of Matter into Pure Substances free essay sample

The purpose of this laboratory was to determine how different substances have different solubilities in a given solvent. This was accomplished using the method of chromatography. The solubility of each substance was first determined by dropping a drop or two of each on a line drawn 2 inches above the bottom of a piece of paper. Then the paper was lightly bent in order to tape both sides of the paper leaving about a 4 centimeter gap so that the sides of the paper are not touching. The paper was then put into a beaker of a hydrochloric acid, ethanol, and butanol mixture, being sure that the paper does not touch the sides of the beaker, and then topped. After the eluting solution has risen to within two centimeters of the top of the filter paper, the paper was removed from the beaker, dried, and was stained with a staining reagent solution containing potassium ferrocyanide and potassium iodide. We will write a custom essay sample on Resolution of Matter into Pure Substances or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page This reagent forms colored precipitates or reaction products with many cations, including all of those used in this experiment. The distance of which the spots moved were determined by calculating the Rf value of each substance. The Rf value is determined by following formula: This experiment was successful overall, given a few errors. This experiment was done twice due to the paper having pen ink marks which interfered with the movement of the substances in the first experiment. During the second trial, it was a little difficult to measure the distance the substances traveled because multiple drops of each were dropped right above each other rather than on top of each other. By the end of the experiment, the distance traveled by each substance and the color changes of each substance was still clear and was able to be measured and recorded.

Meena Alexander Essay Example For Students

Meena Alexander Essay This struggle is the very reason for the writings of memoirs on the parts of Meena Alexander and Sara Suleri. The authors are not very old meaning that a general need to convey the sum of their life experiences has not beset them yet for their lives are obviously not over. While they certainly feel a general urge to impart their knowledge and experiences to the world, the primary objective of their texts is the selfish goal of assistance in their own definitions of themselves and the spaces of womanhood in which they exist. By imprinting this struggle to paper, the authors assist themselves in this definition. While this endeavor into the realm of the self assists the authors of the memoirs, it is not the means by which they elect to connect with their readers. The actual connection required for a higher level of appreciation finds itself within the physical and tangible imagery conveyed by Suleri and Alexandar (Barlow 286). Within their self-definition, these authors assert their own feminine physical nature, and thereby communicate a sense of themselves through their images. The culmination of this defining takes form in Alexanders vivid description of birth and the feel of lips, and my breast beneath (Alexander 167). In turn, the physiological imagery utilized by Suleri bolsters not only her self-image and presence, but also the very tangible and realistic relation of these images in the physical world. In her writing temporal boundaries are transcended through the realistic nature of her images. The reader connects to the text in a sense that in order to appreciate these visions of another persons life and space, one must enter into the described situation for a moment and feel therein, not only the actual description, but also the emotions and views of the author at that precise moment. In the reading of this scene in Meatless Days, to sleep on Ifats bed was milk enough, to sleep in crumbling rest beside her body. Sometimes like water she runs through the sentences of sleep, a medium something other than itself, refracting, innocent of all the algae it can bear and capable of much transmogrification. Her water laps around me almost in reproach (Suleri 186), the reader cannot only envision the bed Suleri discusses, but also, through her control of syntax by means of utilizing the present tense and first person narrative, the understanding of the images of algae, milk, water lapping and crumbling rest evolves to a level of emotional understanding and connection with the view of the author. Through this the space the reader is effectively transcended and the labeling of the other not only disappears, but is never even given a chance to exist. The use of imagery within writing takes on entirely new assets inside works of fiction, primarily in terms of its depth and the convenience of its access in the midst of this medium. The symbolic images of fiction are meant to be interpreted. This much more complex shape of symbolism reflects an art form of expressing the depth and intensity of a given situation through alternative means of literary tools by moving beyond already presented knowledge. This in turn constructs an emotional link between oneself and the text as the reader becomes more psychologically and emotionally involved in the interpretation. In Fasting, Feasting, Anita Desai repeatedly demonstrates her ability to manipulate both of the literary aspects of symbolism, beginning with the more descriptive symbolism as a contrivance through which to better acquaint the reader with the setting and characters of the novel. .u712b6f24bba7767f7991f37c460536ea , .u712b6f24bba7767f7991f37c460536ea .postImageUrl , .u712b6f24bba7767f7991f37c460536ea .centered-text-area { min-height: 80px; position: relative; } .u712b6f24bba7767f7991f37c460536ea , .u712b6f24bba7767f7991f37c460536ea:hover , .u712b6f24bba7767f7991f37c460536ea:visited , .u712b6f24bba7767f7991f37c460536ea:active { border:0!important; } .u712b6f24bba7767f7991f37c460536ea .clearfix:after { content: ""; display: table; clear: both; } .u712b6f24bba7767f7991f37c460536ea { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u712b6f24bba7767f7991f37c460536ea:active , .u712b6f24bba7767f7991f37c460536ea:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u712b6f24bba7767f7991f37c460536ea .centered-text-area { width: 100%; position: relative ; } .u712b6f24bba7767f7991f37c460536ea .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u712b6f24bba7767f7991f37c460536ea .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u712b6f24bba7767f7991f37c460536ea .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u712b6f24bba7767f7991f37c460536ea:hover .ctaButton { background-color: #34495E!important; } .u712b6f24bba7767f7991f37c460536ea .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u712b6f24bba7767f7991f37c460536ea .u712b6f24bba7767f7991f37c460536ea-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u712b6f24bba7767f7991f37c460536ea:after { content: ""; display: block; clear: both; } READ: What Do Christians Believe About Ghosts? EssayAs the narrative progresses, one sees instances of symbolic imagery beckoning the reader to engross himself or herself in the character of Uma, portraying the authors opinion that an emotional connection to the protagonist must transpire. Through the image of, a koel calling in the neem tree piercingly, questingly, over and over again (Desai 25), the reader is allowed a moment to question and consider the meaning of this symbol in the context of Uma as a character, and thereby finds themselves inadvertently, and more importantly, consciously connected to her. A similar evocation of cognizant and emotionally involving thought occurs when hurl themselves at the like heathens in the frenzy of their false religion, and die with small, piercing denotations (Desai 167). The only difference in these two quotes is that the latter one concerns an emotional connection to the novels second protagonist, Umas younger brother, Arun. The importance of these images depends not upon the actual meaning of these symbols, rather upon the realization that the understanding of these symbols requires effort and consideration. In a novel concerned with a culture differing from that of its readers, the establishment of an emotional connection becomes necessary due to the removal of the reader from the characters and text by means of cultural barriers and stereotypes. Through the incorporation of symbolic imagery the reader feels actively involved within the emotions and thoughts of the characters, and becomes much more apt at following the authors gaze, or viewpoint, than situations in which the plot lines are merely narrated (Finke 45).

Comedy Tragedy Essay

Comedy Tragedy EssayWhen you are looking for a comedy tragedy sample essay you will find that there are many of them available. You can find them on the internet as well as through school to be used as samples in classrooms.When you are selecting a tragedy sample essay you need to make sure that you look at the quality of the work. There are some of them that are very high quality and some that are not very good.The funny part about writing a tragic story is that it can get quite dark and complicated. It is a really difficult task because you have to really think of ways to bring humor into the piece. You also have to make sure that the story you are going to use is something that will stand out and tell a great story.When you are looking for a comedy tragedy sample essay you will find that there are many of them available. You can find them on the internet as well as through school to be used as samples in classrooms. You should be sure that you select the one that fits your style.T he first thing that you should do when you are looking for a tragedy sample essay is to find the story that you want to use. You need to sit down and write it out. This way you will be able to see how the whole essay should flow.When you are looking for a comedy tragedy sample essay you will find that there are many of them available. You can find them on the internet as well as through school to be used as samples in classrooms.When you are looking for this type of essay youwill want to write it in a dramatic manner. You should think of ways to make the story more interesting. You should think of ways to bring the story to life.When you are looking for a comedy tragedy sample essay you will find that there are many of them available. You can find them on the internet as well as through school to be used as samples in classrooms.

The life of Rosalinda Franklin Essays - Biology,

The life of Rosalinda Franklin Rosalinda Franklin was a British chemist best known for her role in the discovery of the structure of DNA, and for her pioneering use of X-ray diffraction. She was born in 1920 in London, England. She earned a Ph.D. in physical chemistry from Cambridge University. She learned crystallography and X-ray diffraction, and applied these techniques to discover DNA fibers. Her photographs provided key insights into DNA structure. Many scientists used her photographs as evidence to support their DNA model and took credit for the discovery. Unfortunately Franklin died of ovarian cancer in 1958, at age 37. Rosalind Elsie Franklin was born into an influential Jewish family on July 25, 1920, in Notting Hill, London, England. She displayed exceptional intelligence from early childhood; she started to show passion for science at an early age of fifteen. Franklin wanted to be a scientist. She received her education at several schools, including North London Collegiate School, where she excelled in science, among other things. She enrolled at Newnham College, Cambridge, in 1938 and studied chemistry. In 1941, she was awarded Sec ond Class Honors in her finals. Her award was accepted as a bachelor's degree in the qualifications for employment. She went on to work as an assistant research officer at the British Coal Utilisation Research Association, where she studied the porosity of coalwork that was the basis of her 1945 Ph.D. She studied t he physical chemistry of solid organic colloids with special reference to coal. In 1946, Franklin was appointed at the Laboratoire Central des Servic es Chimiques de l'Etat in Paris. S he worked with crystallographer Jacques Mering . He taught her X-ray diffraction, which played an important role in her research that led to the discovery of the structure of DNA. In addition, Franklin used X-rays to create image s of crystalized solids in identifying inorgani c matter, not just single crystals. In January 1951, she began working as a research associate at the King's College London in the biophysics unit, with director John Randall. She used her expertise and X-ray diffraction techniques to examine DNA fibers. She s tud ied DNA structure with X-ray diffraction, and made an amazing discovery with her student Raymond Gosling . They took pictures of DNA and discovered that there were two forms of it . One of their X-ray diffraction pictures of the "B" form of DNA ( Photograph 51 ) became famous as critical evidence in identifying the structure of DNA. The photo was acquired through 100 hours of X-ray exposure from a machine Franklin refined. Franklin was known for her cautious and diligent work ethic, but she was also known for her conflict with colleague Maurice Wilkins, a conflict which ended up costing her dearly . In January 1953, Wilkins changed the course of DNA history by disclosing without Franklin's permission or knowledge her Photo 51 to competing scientist James Watson, who was working on his own DNA model with Francis Crick at Cambridge. The two scientists did in fact use Franklin's Photo 51 as the basis for their now famous model of DNA . They published it on March 7, 1953, and received a Nobel Prize in 1962. Crick and Watson were also able to take most of the credit for the finding . M uch of their work however was based on Franklin's photo s and findings. Unfortunately, Franklin didn't know that these men based their Nature article on her research, and she didn't complain either . Franklin left King's College in March 1953 and relocated to Birkbeck College, where she studied the structure of the tobacco mosaic virus and the structure of RNA. Because Randall let Franklin leave on the condition that she would not work on DNA, she turned her attention back to studies of coal. In five years, Franklin published 17 papers on viruses, and her group laid the foundations for structural virology. In the fall of 1956, Franklin discovered that she had ovarian cancer. She continued working for two years, despite her illness. She received an experimental chemotherapy treatment and experienced a 10-month remission and worked up until several weeks before her death on April 16, 1958, at the age

Women’s Brains Essay Example

Women’s Brains Essay Example Women’s Brains Paper Women’s Brains Paper Women’s Brains by Stephen Jay Gould discusses how inferior women are to men, based on scientific data. George Eliot, in the prelude of Middlemarch, grieved over the unfulfilled lives of talented women. She wrote in 1872 that the leaders of European anthropometry or measurement of the human body, scientifically measured the inferiority of women. But it was craniometry or measurement of the skull, led by Professor Paul Broca, which got more attention. Broca argued that women had smaller brains than men, therefore could not equal their intelligence. He claimed this is scientific truth since men in modern societies possessed larger brains and that their superiority through time increases. He based this on extensive data that came from autopsies he performed in four Parisian hospitals. For 292 male brains, he calculated an average weight of 1,325 grams; 140 female brains averaged 1,144 grams for a difference of 181 grams, or 14 percent of the male weight. Though he recognized that the difference in brain size could be attributed to greater height of males, he made no effort to measure the effect of size alone and claimed that it cannot account for the entire difference. However, there are those who oppose Broca’s fold. One was Tiedemann, who proposed that the relatively small female brain size depends in part upon their physical inferiority and in part upon their intellectual inferiority. Another defender of women was L. Manouvrier, who claimed that women displayed their talents and diplomas and invoked philosophical authorities. Unfortunately, bad commentaries and sarcasm outnumbered these positive points. Examples of which were theologians asking if women had a soul and scientists ready to refuse them of a human intelligence. In 1873, Broca measured cranial capacities of prehistoric skulls from L’Homme Mort cave and found a difference of only 99.5 cubic centimeters between males and females. According to Topinard, one of Broca’s disciples, the increasing discrepancy through time is attributed to active men, who have all the responsibility and therefore needs more brain, and to the passive woman, whose role is childrearing. But the chief misogynist of Broca’s school was Gustave Le Bon, who claimed that there are a large number of women whose brains are closer in size to the gorillas’ than to most developed male brains. Even psychologists, poets, and novelists recognized that women represent the most inferior forms of human evolution, closer to children and savages than to an adult, civilized man. There may be distinguished women, but they were a minority. Moreover, Le Bon opposed granting women higher education, saying that when this happens, a social revolution will begin and t hat everything that maintains the sacred family ties will vanish. Gould, reexamining Broca’s data, said that his numbers were sound but his interpretations were ill-founded. Broca made conclusions yet he studied only seven male and six female skulls in L’Homme Mort. Furthermore, he did not consider that brain weight decreases with age. Women in his studies were considerably older than men. Using multiple regression, Gould found that at average height and age, a woman’s brain would weigh 1,212 grams, which reduces Broca’s measured difference of 181 grams to113 grams. Moreover, Broca did not also consider degenerative diseases that often entail substantial decrease of brain size. Many of his subjects were elderly women, assumed to have lengthy degenerative disease than men. In addition, Manouvrier argued that when muscular mass and force are used, difference in brain size will be in favor of men. But with â€Å"sexual mass,† women came out slightly ahead in brain size. Therefore, the corrected 113-gram difference is too large since the true figure is close to zero. To understand Broca’s contentions though, one must realize that he had easier access to women’s brains. However, Maria Montessori concluded that women were intellectually superior, but men had prevailed heretofore by dint of physical force. Gould ended the article with George Eliot’s prelude to Middlemarch, saying Eliot appreciated the special tragedy that biological labeling has imposed upon members of disadvantaged groups, women like herself.

Fire Safety Project Essay Example | Topics and Well Written Essays - 2000 words

Fire Safety Project - Essay Example Every building should have minimum requirements of fire protection measures which help the occupants in a timely escape in the event of fire. The building should have both active and passive fire protection in place to ensure safety. This includes alarms, fire detection and safe escape strategies. Placing fire alarms and fire detections are the minimum requirements for any premises. The premises should have better and sophisticated system in place which will help in performing the following functions such as- Provision of fire alarm detectors can help in providing early warning for the building occupants. Fire alarm detectors help in increasing the occupant’s response time. The warning system helps in making the right decision for the occupants to evacuate or hold position in the building. The provision for fire alarm detectors is an additional fire safety and it depends upon the level of management and the number of occupants in the building. Voice alarm will help increase the speed of the response even if the occupants are not familiar with the building layout. (Code of practice for fire safety in the design, management and use of buildings,2008) It is essential that the fire procedures take priority in the event of fire. Trained staffs should be available to be able to guide the occupants to a safe area. The escape flights should be constructed of materials which have limited combustibility. The escape stair should be broad enough to accommodate and have the capacity to a fit large number of people during an emergency evacuation. The fire safety procedure should also have a preferred method of evacuation for disabled people by horizontal evacuation. Provision of sprinklers is also recommended for hotel buildings. In the event of a fire, all the provisions and procedures are implemented to help in taking corrective course of

Theoretical concepts of Risk Management in relation to projects Coursework

Theoretical concepts of Risk Management in relation to projects - Coursework Example Thus, the study is focused on presenting a view on risk management. Objectives of the Study The risk management is necessary to be able to survive and plan the different problems and trials facing the organisations. The study is aimed to review the theoretical concepts of risk management specifically related to projects and practical implementation of strategies, plans and procedures. In addition, relevant corporate governance aspects of organisations are also included. Included in the specific topics covered in the research are the key challenges and applications in risk management, risks associated in research and development, risks in new product development, change management, technology transfer, and system integration of technology and the manpower. The needs for team working skills appropriate to risk management and the methods for formulating risk management strategies such as project risk models, migration, and contingency plans for appropriate action. Background of the Stud y Risk is the â€Å"combination of the probability of an event and the consequences which can either be beneficial or detrimental to the organisation or particular project. Due to the implications of the risks involved, the need to prepare for the risks is essential (Institute of Risk Management, 2002, p.2). Risks are inevitable in any type of activities, projects or organisational operation, thus, methods and techniques in recognising, resolving and working the risk as opportunities and chances of growth and excellence are being established (Loosemore and Raftery, 2006, p.1). One example of risks considered is in the safety field wherein the main concentration is the preparation for the negative risks to be able to ensure safety (Institute of Risk Management, 2002, p.2). The risks can affect different aspects of an organisation or project including physical, monetary, cultural, and social dimensions (Loosemore and Raftery, 2006, p.1). In addition to the complex effects of risk tha t serves as stimulus for action undertaken by organisations, risk can either serve as threat or opportunity which lead to essential benefits such as exploits more opportunities, enables trade-offs, increases the chances of success, sustains creative exploration and innovation, increases efficiency, and promotes motivation within teams (Hillson, 2009, p.9). There are different types of key risks that can affect risk management. These can be classified into the external and internal factors that are categorised as financial risks, strategic risks, operational risks and hazard risks. External financial risks are composed of factors related to interest rates, foreign exchange, and credit. External strategic risks include competition, customer or stakeholder changes, industry changes, customer or stakeholder demand, and M & A integration, which is also an internally driven risk. External operational risks include factor such as regulations, culture, board composition, and the recruitment and supply chain which are also considered as internally driven risk factors. Contracts, natural events, suppliers, and factors related to the environment are classified as the externally driven hazard risks. Other types of external hazard risks are the public access, employees, properties, product and services which are also classified as internally