A Future Free of Paper -- Internet Technology Papers

A Future Free of Paper Cyberculture is a term that over 15 years ago you would have not given much thought to. Computers were still foreign and scary to many of us then. We saw this big object, that seemed to be able to zap anything into some dark space and beyond. Now, computers are involved in our lives everyday in some way. We use them at work, for school, and even still for the pure enjoyment of them. They are slowly creeping into our lives and taking over our everyday task. I no longer need to balance my checkbook, the computer will do it for me. When ever I need to know a fact fast, I no longer need to pour over the encyclopedia. I can just ask "Jeeves", who has the answers for almost everything. Sure, there are still those diehard fans of doing everything by hand, but eventually they will give in and join the rest of us cyberfreaks. Does this mean it is the end for anything that does not jump on the cyberculture ban wagon? Will we be able to function on technology alone? These are questions that I believe aren't that far into the future. With everything turning to technology, it seems if you do not join you are quickly left behind. Cyberculture is our future and it will only advance with more tools and more functions becoming available to us. What is the Cyberculture future and what will it effect? I believe cyberculture is going to effect everything we do and the manner in which we accomplish it. If we look at the way it has effected our reading and writing as of today, we can already see the change that has occurred and probably the direction we will be heading into. Computers have taken over what paper used to reign and adding it's own touches along the way. First look at the way we communicate with othe... ...gh, this will have an effect on the sale of books. There are many tools that are still not in play that I believe will effect the future of books. With technology changing everyday and growing rapidly it will only be a matter of time before all the tools will be in place and of course there will always be those diehard book readers who want the real thing in their hands and in front of them. They will slowly be weeded out though, as the next generation grows with the technology and looks at a real book as a great way to fix that lopsided table leg. Works Cited Evelyn Tribble, and Anne Trubek, eds. Writing Material Readings from Plato to the Digital Age. New York: Longman, 2003. Landow, George. Twenty Minutes into the Future, or How Are We Moving Beyond the Book? Tribble and Trubek 214-226. Lesser, Wendy. The Conversion. Tribble and Trubek 227-232.

Determination Of Vitamin C Content Of Tablet Essay

ABSTRACT In this experiment, the vitamin C content of a commercial tablet is determined and compared with the manufacturers’ specification. Vitamin C is water-soluble and is an enantiomer of ascorbic acid. (Commercial vitamin C is often a mixture of ascorbic acid and other ascorbates.) Ascorbic acid, C6H8O6, is a reducing agent that reacts rapidly with iodine (I2). As the iodine is added during the titration, the ascorbic acid is oxidized to dehydroascorbic acid, while the iodine is reduced to iodide ions as shown in the following equation. Ascorbic acid + I2 (aq) ———–> 2I- (aq) + dehydroascorbic acid Due to this reaction, the iodine formed is immediately reduced to iodide as long as there is any ascorbic acid present. The amount of ascorbic acid is determined by the stoichiometry of the equations and the difference between the total amount of iodine present and the amount that reacts with the thiosulphate. This method is suitable for use with vitamin C tablets, fresh or packaged fruit juices and solid fruits and vegetables. INTRODUCTION Vitamins are a group of small molecular compounds that are essential nutrients in many multi-cellular organisms, and humans in particular. L-Ascorbic acid was first isolated as a pure substance by Albert Azent-Gyorgi and Charles Kingin 1928 (Pauling, 1970), an anti-oxidant and free radical scavenger, is found ubiquitously in fruit and vegetables such as citrus fruits (oranges, lemons, limes, tangerines etc.), melons, tomatoes, peppers, broccoli, green leafy vegetables such as spinach, potatoes and turnips, its quantitative determination is especially important in the production of wine, beer, milk, soft drinks and fruit juices, where it can be a quality indicator (Gerrior & Zizza, 1994)] .Given the essential role played in the human diet and necessary to growth and repair of tissues in all parts of human body .It is necessary to form collagen an important skin proteins ,scar tissue ,tendons, ligaments, and blood vessels. Vitamin C  is essential for the healing of wounds, and for th e repair and maintenance of cartilage, bones and teeth (Mcevoy, 1993) one of the several ways of determining the ascorbic acid content of a solution is by titration. Figure structure of vitamin c (ascorbic acid) Titration is a volumetric analysis and is one of the basic analytical techniques in chemistry which enables one to quantitatively determine how much of a specific substance is contained in a given sample. This technique is involved in almost every aspects of our daily living such as life sciences, clinical chemistry, water pollution, industrial analyses etc. In order to make meaningful titration analysis, one has to understand and learn the principles involved. Several types of titration techniques are now available but, two general types which are still in much use are acid-base and reduction-oxidation (Redox). Acid-base titration involves the neutralization reaction and the products are generally salt and water. Redox titrations involve the titration of an oxidizing agent (or oxidant) with a reducing agent (or reductant) or vice versa. Oxidation process involves loss of electrons while reduction process involves gain of electrons. Thus an oxidizing agent is one which accepts electr ons while a reducing agent is one which loses the electrons. There must be a sufficiently large difference between the oxidizing and reducing capabilities of these agents for the reaction to undergo completion with a sharp end point. MATERIALS AND METHOD 250-mL conical flask Vitamin C tablets 400-mL beaker KBrO2 solution 50-mL, 25ml and 10ml measuring cylinder 10% KI solution 50-mL burette with stand 2.0 M H2SO4 solution Glass stirring rod Starch indicator Analytical balance A. STANDARDIZATION OF SODIUM THIOSULPHATE 1. A standard titration setup was framed up using a stand, a burette clamp and a white tile Figure 2 setup for titration (Courtesy of http://www.chemteach.ac.nz) 2. A burette was rinsed with distilled water and then with the given sodium thiosulphate solution. 3. With the stopcock closed, the rinsed burette was fully filled up with the sodium thiosulphate solution and then the stopcock was opened so that the tip of the burette was also allowed to be filled up. The initial burette volume was recorded to an accuracy of 2 decimal places 4. A 25.00cm3 pipette was rinsed with distilled water, and then with KBrO3 solution. 5. 25.00cm3 of standard solution of KBrO3 was transferred to a clean conical flask using the rinsed pipette. 6. Using a 25cm3 measuring cylinder, 25ml of 2M H2SO4 was transferred into the conical flask containing the KBrO3 solution. 7. Using a 10ml measuring cylinder, 5ml of 10% KI solution was also added to the conical flask containing the KBrO3 solution. 8. Immediately, the reaction mixture in the conical flask was titrated with the sodium thiosulphate solution until a pale yellow solution was observed. 9. A few drops of starch solution were added to the pale yellow solution in the conical flask. 10. Titration of the mixture was continued until the solution changed from dark blue to colorless. The final burette reading, accurate to 2 decimal places, was recorded. the volume of the sodium thiosulphate solution added was calculated 11. Apart from the first trial, 2 more successive titrations were carried out. The burette was refilled in between runs when the volume remaining was not enough for a complete titration. B. ANALYSIS OF VITAMIN C TABLETS Figure 3 vitamin c tablets (Courtesy of lule.blogspot.com) 1. A tablet of vitamin c was transferred into a 250ml conical flask and  approximately 40cm3 of 2M H2SO4 was added. The tablet was then crushed to dissolve until a solution formed. 2. Using a measuring cylinder, 10cm3 of 10% KI solution was added to the tablet solution and 25cm3 of standard KIO3 solution was pipetted in to the flask. 3. The solution was then immediately titrated with standard thiosulphate solution in the burette until the dark color changed to the original color of the tablet. 4. This procedure was repeated with 2 more samples of the tablet. 5. The volume of sodium thiosulphate used in each titration was recorded and the average volume was calculated. RESULTS AND CALCULATIONS TRIALS INITIAL READINGS FINAL READINGS TITRE VOLUME AVERAGE TITER 1 0.85 33.60 32.75 32.33 2 0.80 33.10 32.30 3 14.85 46.80 31.95 Table results from standardization of sodium thiosulphate (A) Number of moles of KBrO3 in 25cm3 solution = [this formula is used because the molarity of the solution is given and the volume is known]  0.00964Ãâ€"0.025=0.000241mol Mass of KBrO3 solution used= [this formula is used in deriving the mass of a substance when the no. of moles is given (or derived)]=0.000241molÃâ€"167g/mol=0.040247g= 40.25mg Concentration of KBrO3 = No. of moles of Na2S2O3 required for one titration = 0.00241molÃâ€"6= 0.01446mol Moles of I2 liberated = 2.41Ãâ€"10-4 moles Concentration of Na2S2O3= 0.298mol/dm3 TRIALS INITIAL READINGS FINAL READINGS TITRE VOLUME AVERAGE TITER 1 8.80 11.70 2.90 3.43 2 11.70 15.20 3.50 3 15.20 19.10 3.90 Table 2 results from vitamin C analysis (B) Brand of vitamin C: Cenovis Manufacturer’s specification of vitamin c tablet: 1000mg of vitamin c per tablet Molar mass of vitamin C (C6H8O6) = 12Ãâ€"6+1Ãâ€"8+16Ãâ€"6=176g/mol Balanced Equation for reaction = KIO3+5KI+3H2SO4→ 3I2+3H2O+3K2SO4 Number of moles of KIO3 in 25cm3 solution = 0.00100 mol Moles of I2 produced by 25cm3 of KIO3= 0.00100Ãâ€"3= 0.003 moles No of moles of Na2S2O3 needed to react with excess I2 Moles of I2 that reacted with sodium thiosulphate No. of mole of Na2S2O3 = No. of mole of original I2 – no. of mole of excess I2 =0.000723- 0.0005=0.000223mol No. of mole of I2 that reacted with ascorbic acid = 0.006-0.0005 = 0.0055 Mass of ascorbic acid = 176Ãâ€"0.0055= 0.92g =920mg CONCLUSION The experiment was successfully carried out and the results were encouraging. The analysis of the vitamin c content of the Cenovis tablet was carried out using titration. The vitamin c tablet was crushed into a conical flask and specific amounts of KI and KIO3 were added. The solution was then titrated with standard thiosulphate solution until the required color was derived. The results were recorded and calculations to determine the amount of ascorbic acid in each tablet was also successfully done. However the results  from the experiment showed different values from the manufacturer’s specifications. The manufacturer (Cenovis) claims that each vitamin c tablet contains 1000mg of ascorbic acid while this experiment shows otherwise. After calculations were done, the experiment found each vitamin c tablet to be containing about 920mg of ascorbic acid which is below the manufacturer’s specification. However this error could be as a result of different factors; 1. The ma nufacturer of the tablet made wrong analysis of the tablet. 2. This experiment contained errors which arose from wrong reading of instruments, wrong calibration of instruments, or errors in uncertainty. Works Cited Gerrior, S., & Zizza, C. (1994). Nutrient content of the U.S food supply, 1909-1990. Washington D.C: U.S department of Agriculture. Mcevoy, G. (1993). Drug information the american hospital formulary service. American society of health-system pharmacist. Pauling, l. (1970). vitamin c and the common cold. studymode.js. (2010). commercial vitamin c tablet analysis. Retrieved from studymode: http://www.studymode.com/essays/Commercial-Vitamin-c-Tablets-Analysis-470526.html

Cyber Threats Online Cyberbullying - 906 Words

More than 2 in 4 social media users have experienced cyber threats online. Social Media has come a long way creating many ways to entertain ourselves and interact with others, such as, friends, family, or complete strangers. Over the years technological advances have certainly increased. Social networks have skyrocketed tremendously over the past years becoming highly popular all over the world and to everyone. For instance, we know have Facebook, MySpace, Twitter, and Instagram etc. These social networks might be a luxury to some people but unfortunately others have experienced awful situations and encounters that have left them traumatized. Not only are people getting bullied, harass, and teased on these social Medias but its changing the way we interact and communicate with one another in real life. Sarah Zay, of USA Today, said that â€Å"With the rise of websites such as Facebook, social networking may be on the verge of replacing traditional personal interactions for the next generation.†(Sarah). Social media sites provide many opportunities for businesses and entrepreneurs, but Social Media greatly impacts our society in a negative way as it causes physical and mental harm to select others, identity fraud(Sex-Offender), and it’s changing the way we communicate and interact. First of all, nowadays we have so many social networks to choose from cyberbullying has sadly increased. Adults, teens, and even children have been virtually attacked, harm and in some cases physicalShow MoreRelatedCyberbullying : Causes And Dangers Of Cyber Bullying985 Words   |  4 Pageshave been cyber bullied online on social media, websites, and through via communication like emails and group chats. 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Occasionally beingRead MoreCyber Bullying And Social Media1110 Words   |  5 Pagesconstant contact with loved ones or people geographically across the globe from us. It also allows for an effortless way for individuals to hide behind a computer and bully others through online profiles. This effect is called cyber bullying and has exploded in use through the occurrence of Social Media. Cyber Bullying can be described as using the internet, cell phones, and other technology gadgets to send, text, or post with the intentions of hurting or embarrassing others. The most vastly used