Membranes: Cell Membrane and Purple Dark

Cell Membranes and Transport Hands-On Labs, Inc. Version 42-0033-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Exercise 1: Diffusion ObservationsData Table 1: Rate of diffusion in different temperatures| | ? C| Minutes| Temperature| InitialTemp. | InitialColor| 5| 10| 15| 20| 25| 30| 60| Cold| 3| white| white| white| white| white| white| white| Mostly white some blue| Ambient| 25| white| blueish| Light blue purple| blue purple| blue purple| purple| purple| Dark purple| Hot| 96| white| purple| DARKpurpleple| Dark purple| Dark purple| Dark purple| Dark purple| Dark purple| Questions A. Write a one-paragraph ana lysis of the results for the procedure. Provide reasons for the difference in the rate of diffusion at the different temperatures.The results of this lab were greatly influenced by the temperature of the KI solution. The bag placed in the heated solution began to change color (from white to light purple) almost immediately and changed to dark purple within 7minutes. The second bag in room temp. solution took about 5 minutes to see a slight change in color (from white to light blue) and about 20 to turn dark purple. The third bag in the cold temp. solution barely changed color at all at the end of the hour (bluish tint. ) According to the text (p. 68), â€Å" Because the driving force for diffusion is the kinetic energy of the olecules themselves. The speed of diffusion is influenced by molecular size ( the smaller, the faster) and by temperature ( the warmer, the faster). † Through this lab experiment we were able to see that diffusion did happen faster in the warm water by s eeing the fastest change in color of the contents inside the baggie. B. Did the sizes of the molecules affect their movement? Yes, the smaller the molecules (KI) were able to permeate thru the bag where as the bigger molecules (water) and corn start could not permeate thru the membrane bag due to their large size. C.Give an example of diffusion between: a solid and a liquid; a gas and a liquid; between two different solids. (solid/solid) Gold and lead- over time, molecules of lead will diffuse into the gold and vice versa. (solid/liquid) Sugar and water- Sugar will dissolve in water. (Gas/liquid)Perfume and air- the scent will spread. Exercise 2: Osmosis Observations DataTable 2: Potato Mass| Contents in TestTube| Initial Mass of Two Potato Strips| Final Mass of Two Strips| MassDifference| % Change inMass| Class Average Percent Change in Mass (if available)| a) Distilled Water| 3. g| 5g| 1. 4| 38%| | b) 1. 0 M Sucrose| 3. 4g| 2. 1g| -1. 3| -38%| | c) 0. 8 M Sucrose| 3. 6g| 2. 1g| -1 . 5| 42%| | d) 0. 6 M Sucrose| 3. 5g| 2. 6g| -. 9| -25%| | e) 0. 4 M Sucrose| 3. 5g| 3g| -. 5| -14%| | f) 0. 2 M Sucrose| 3. 4g| 3. 7g| . 3| 9%| | Questions A. Describe how the potato cylinders changed in their turgidity. Identify which of the solutions were isotonic, hypertonic, and hypotonic in relation to the potato. a) Distilled Water| No change in turgidity. Hypotonic solution. | b) 1. 0 M Sucrose| Very turgid. Hypertonic solution. | ) 0. 8 M Sucrose| Turgid. Hypertonic solution. | d) 0. 6 M Sucrose| Moderately turgid. Hypertonic solution. | e) 0. 4 M Sucrose| Slighty turgid. Hypertonic solution. | f) 0. 2 M Sucrose| No change in turgidity. Hypotonic solution. | B. What would happen to a red blood cell placed in distilled water? Why? Distilled water is a hypotonic solution which means in contains no solutes. According to the text (p. 72), â€Å"Cells placed in a hypotonic solution plump up rapidly as water rushes into them. † This means that a RBC would eventually pop. C .Create a graph of your experimental data by plotting the percent change in potato mass against sucrose molarity. Label the x-axis as â€Å"Molarity of Sucrose,† and the y-axis as â€Å"% Change in Mass. † D. Determine the molar concentration of the sucrose contained in the potato strips by using the graph created in question C. At the point where the molar concentration of the sucrose in the potato would be isotonic to the sucrose, there would be no net change in the potato mass. On the graph, this is located at the 0% change. Draw a line from this place on the y-axis to intersect the line.From the line draw a line down to the x-axis to find the molarity. Molar concentration of sucrose in potato = . 3 M Exercise 3: The Effect of Solvents on Membrane System Observations Data Table 3: Color Intensity from Damaged Beet Cells| TestTube| Solution Treatment| ColorIntensity0 – 10| Condition of Beet (turgid, flaccid, etc. )| a| 70% Isopropyl alcohol| 10| Very flacid| b | 35% Isopropyl alcohol| 7| bendable| c| 17. 5% Isopropyl alcohol| 3| Less firm| d| Distilled Water| 0| Very firm. | Questions A. What is the reasoning behind the use of egg whites?How does this part of the experiment relate to membranes? Egg whites would provide a lipid layer mimicking the cell membrane layer of a cell. Also egg white are largely composed of water this would also mimic the cell membrane. B. What do the results of test tube e tell about the effect of isopropyl alcohol on egg whites? The effects of the alcohol on the on the egg whites were that it made the chunky as almost if they had been cooked. C. What do the results of test tube f tell about the effect of isopropyl alcohol on oil?How does this relate to membranes? The oil sinks in relation to the alcohol. This is related to membranes due to the hydrophilic and hydrophobic aspects. Lipids arrange so that the hydrophobic â€Å"tail† regions are isolated from the surrounding polar fluid, causing the more hydr ophilic â€Å"head† regions to associate with the intracellular (cytosolic) and extracellular faces of the resulting bilayer. D. Based on the results from test tubes a through d, which of the solutions caused the most damage on the membrane system? Explain your answer.The solution with the highest concentration of Isopropyl alcohol cause the most damage to the membrane because exposure to high concentration of organic solvents would disrupt membrane integrity. E. Using the same data collection method, develop a hypothesis and use the scientific method to design an experiment that would show the effect of temperature stress on membranes. Extreme temperatures, mainly -5? C and 70? C, will significantly damage the cell membrane while the temperatures closer to room temperature will cause only slight damage, if any.

Sony corp Essay Example | Topics and Well Written Essays - 750 words

Sony corp - Essay Example Though not all have been successful, Sony has endured in the world of high technology. The company had its beginnings by bringing a portable AM radio within the reach of all consumers and has evolved to encompass the areas of information technology, digital home electronics, media content, and financial services. Because of Sony's diverse product line, the company has found it beneficial to have a marketing plan that sells its business products through channels as well as direct sales to the consumer. Sony primarily sells its information technology to businesses through its Solution Provider Center that was introduced in 2006. Jay Dishong, vice president of business-to-business sales states that the Center provides improved, "commitment, communication and service levels to our distributors, solution providers and B2B end users" (Dishong). Mike Abary, vice president of Vaio notebook marketing states that , "You can no longer buy direct, if you are a business. The move to an all-channel model, he said, was driven largely by the better economics of delivering to businesses via solution providers" (Moltzen). In contrast to Sony's Provider Center for B2B products, their consumer products are marketed through direct sales via a web portal. The web site, Sonystyle.com also lists a toll free number that consumers can call to place an order. In addition, consumer products are made available through major retail outlets (Sony Style). . Sony products are marketed under categories that include electronics, music, games, movies, components, and financial services. They sell home entertainment electronics, the Play Station 2 video game, Blu-ray DVD discs, and digital cameras and camcorders. As a broad based home entertainment provider, they also own Sony Studios, which produces and distributes original movies and television content (Sony Pictures). These products are aimed at the consumer market. Sony also markets a line of audio-visual and information technology that targets businesses. These products include VAIO products, public displays, projectors, and optical storage products (Abary). The Sony Semiconductor Group manufactures electronic components to be used by OEM manufacturers. Sony financial services include banking, insurance, and credit cards. The core of Sony's business is the home electronics and information technology, which accounts for 90 percent of their revenue ("Business at a Glance"). Sony's objective has been, and remains, to be the leader in networked home electronics. By offering products that interact with each other they are able to network a household through a common entertainment network. Sony's marketing strategy has been to create a group of products that work together to deliver media content in the home. That strategy was based on the popularity of broadband and by the forming of alliances. The Play Station 2, and its DVD format Blu-ray, have been a key component of that strategy. "The development of the Play Station itself was aided by alliances forged between hardware designers and game-software developers; so were other innovations like the compact disc, a result of an alliance with Phillips" (Singh, Pangarkar, and Heracleous 99). Learning from the bitter rivalry between the videotape formats of Betamax and VHS, Sony has utilized alliances to popularize the Blu-ray high definition DVD format. In conclusion, Sony is primarily an

Report of Marketing Campaign review-Vodafone New Zealand PXT service Essay

Report of Marketing Campaign review-Vodafone New Zealand PXT service - Essay Example Vodafone Group was established in the United Kingdom back in 1983. The company acquired its New Zealand business – previously known as BellSouth New Zealand in November 1998. At the time Vodafone Group made the purchase, BellSouth had a total of 138,000 customers. As of June 2006, Vodafone New Zealand had a customer base of 2.1 million customers that is composed of 55% share of the New Zealand mobile market.1 The competition in the New Zealand mobile market is very tight. For this reason, the company needs to constantly upgrade its system such as PXT messaging. In 2001, Vodafone New Zealand signed up a commercial agreement with Telecom New Zealand today in order to enable their customers to send sound enables photo and video messages between the two mobile networks.2, 3 Vodafone New Zealand introduces its free weekend use of PXT messaging as a marketing campaign between the periods of December 2003 until September 2004.4, 5 Vodafone PXT â„ ¢ uses this strategy with the attempt to boost the demand for multimedia messaging. Since January 2004, the PXT messaging across the Vodafone network has increased at a rate between 35 – 50% month-on-month despite the price of 75 cents per message.5 In line with the increase in the use of PXT messaging, the sales of more featured phones were also increasing. Vodafone used the GO-Race (Loo-Racer) as a unique way of launching the new PXT capable phones. This event was featured on 30 second TV commercial throughout New Zealand and Australia together with some print ads campaign. This campaign was successful in reaching for Vodafone’s target market. There is only one competitor in the New Zealand mobile industry – The Telecom NZ because of the high cost of infrastructure requirements. This also becomes a barrier to exit. Due to globalisation, it is still possible for International Telecommunications Company to penetrate the industry

Email and Privacy and how Cyber Law Protects User Rights Research Paper

Email and Privacy and how Cyber Law Protects User Rights - Research Paper Example After the discovery of the internet, electronic communication has rapidly evolved and hence the internet has grown to a complete unregulated and an unplanned phenomenon. The inventors of the internet and the World Wide Web never anticipated that it could lead to extreme undesirable consequences (Bazelon, 2001). The growth rate of the internet has been expanding at an alarming rate where recent studies indicate that the population of internet users is doubling after every three months due to the emergence of social sites as well as development of e-commerce. Many people are turning to electronic means of communication being offered by the internet, especially e-mails which can pass, store, and retrieve information from a database provide by an Internet Service Provider (ISP). However, as the internet becomes more useful day after day, it has been blamed on various sandals of money laundering, moral decay, as well as several legal issues related to privacy and hence the emergence of cy ber laws which contain all the regulatory and legal aspects of the world wide web and the internet(Bazelon, 2001). The Fourth Amendment of the United States Constitution deals with the issues concerning searches and seizures which may in one way or the other compromise an individual’s privacy and one case that involved such a violation was United States v. Warshak (Trout, 2010). Warshak was enjoying the reasonable expectation of privacy of his e-mails from his Internet Service Provider, Nu Vox until government agents compromised his rights by ordering the ISP to preserve and issue his emails without first obtaining a warrant which was to be based on probable cause, thus in accordance to the Fourth Amendment, the government agents had violated the privacy rights of Warshak. However, the agents depended on good faith with reference to the Stored Communications Act even though this exclusionary rule was not applicable in such a case (Trout, 2010). In another case involving United States v. Bynum, Mr. Bynum gave his information with the expectation that ISP would protect the privacy of his int ernet and phone subscriber information. However the internet service provider violated the Fourth Amendments by releasing personal information of Mr. Bynum to the FBI without them first obtaining subpoenas (Schwartz, 2009). Another similar case involved the U.S v. Councilman, in this particular scenario Councilman retained his client’s personal information especially his competitors through Wiretap in violation of the Wiretap Act. The interception and seizure without consent of his customers was contravention of the Fourth Amendment. Thus there was an urgent need to amend the Wiretap Act to have a broad definition of the word â€Å"intercept† to include electronic communication temporary in transit because the previous definition only encompassed the e-mails on electronic storage in computers. Congress amended the definition on 22nd July 2004 (Bazelon, 2001). Discussion During the case of United States v. Bynum, 08-4207, the court failed to accept the argument from the defendant that the use of subpoenas by the government in an effort to get subscribers information from his ISP was a violation of the Fourth Amendment rights of privacy (Trout, 2010). The court ruled that there was lack of evidence that â€Å"†¦the defendant had a subjective expectation of privacy in his internet and phone subscriber information†¦Ã¢â‚¬  Later he voluntarily accepted that he had freely given his personal data to his ISP and phone company and as a consequence, he had assumed the risk that theses companies could reveal his information to the authorities without his jurisdiction (Trout, 2010). Additionally, the court noted that Bynum was capable of demonstrating a subjective expectation of privacy with regard to this information, and then the information was subject to reasonableness test.

Ip1 personnel and organization policy Research Paper

Ip1 personnel and organization policy - Research Paper Example However, the tests are based according to the position up for recruitment and the type of responsibilities involved by taking up the position. However, Huffcut (2010) argues that interviews are compulsory inclusions of the tests since the give the candidate and the recruiter an opportunity to have a more indulging conversation and it makes recruitment easier and effective. In an existing organization, HR mangers are tasked with the responsibility of evaluating whether a position would be effectively filled with an external or internal candidate. An external candidate has an added advantage since they would bring new working experience in an organization. However, an external selection raises the question of the ability of the personnel to adapt to the new organizational culture (Muchinsky, 2012). An internal selection is appropriate since an organization would be able to retain an inbuilt experience and one that understands the existing organizational culture. This would however limit the rate of exposure an organization benefits from in terms of experience and new working criteria (Huffcut,

Knowledge Management Assignment Example | Topics and Well Written Essays - 750 words - 3

Knowledge Management - Assignment Example nology may come along with challenges such as handling information overload, verifying and locating online expects, efficient knowledge mining approaches, reliability and security issues, filtering knowledge, and managing conflicts whenever many experts are involved. Traditional expert systems were designed for standalone computers. The challenge in this sense is that, many shells do not support the interoperability and openness needed for deploying expert systems over an extensive network. In addition, the internet was originally visualized as a document sharing infrastructure ad any effort to use it for sharing or distributing expert systems must manage all he difficulties. A number of web-based expert tools are easily accessible, but no formal assessment and comparison of diverse ones has been carried out (Hayes-Roth 13). If I were a management consultant, I would recommend the domain-specific knowledge-based expert systems technology to my clients. This is for the reason that it is a valuable resource through which knowledge is gained after some time of experience with a given problem. Most importantly, the expertise is never lost in an organization, rather transferred to other employees through training. Neural network technology has been demonstrated as a useful tool for modeling compound non linear relationships that have hidden data, offering superior prediction powers than traditional statistical techniques can do. This technology can perform tasks that cannot be performed by a linear program. When one of the key elements of a neural network stops working, it can continue without any inconveniences due to its parallel nature. In fact it learns without necessarily being reprogrammed. Further, it can b implemented in an application without many complications because researchers do not need a superior mathematical background, rather a few experiments and expenses. Finally, it is possible to include new outputs and inputs to the database to obtain a new

Media Journal Assignment Term Paper Example | Topics and Well Written Essays - 1250 words

Media Journal Assignment - Term Paper Example In order to do so, Walter gets engaged in the drug dealing profession as well as other criminal activities and gradually becomes remarkably expert in executing his operations of producing and marketing drugs accompanied by one of his former students named Jeese Pinkman (AMC Network Entertainment LLC., â€Å"Returns Summer 2013†). Typical Setting The entire series was aired through several episodes. From an overall perspective, the entire series can be observed to represent the negative psychological effects of a fatal disease on an ordinary person which often gets boosted by his feel of insecurity. The objective of the series has thus been to demonstrate how a deadly disease can completely change an average man into a criminal. Major Characters There are nine major characters in the series comprising of Walter White, his wife Skyler White, his son Walter Junior and his former student Jesse Pinkman. The other characters included Mike Ehrmantraut, a former police officer of Phil adephia, Saul Goodman, a criminal lawyer, Hank Schrader, a ‘Drug Enforcement Administration’ officer and Marie Schrader, sister of Skyler White. Other sub characters included Jesse’s friend Brandon, Hank’s companion Steven Gomez Schrader and Jesse Pinkman’s neighbor Jane Margolis (AMC Network Entertainment LLC., â€Å"Returns Summer 2013†). Who/What is missing from the text? No gaps have been observed in the television program setting maintaining a effective flow from one episode to another for the audiences to follow and interpret the information in an unambiguous way. Step 2: Textual Analysis Description Breaking Bad season 3 explores profoundly into the atmosphere of drug dealership and generates an intense and credible situation for the viewers representing the role of media is the revealing of psychology related motivational causes of criminal activities. Using the term ‘breaking bad’, the producer intends to tell that once a person has conducted criminal act and gets involved in bad activities, the psychology of that particular person becomes unable to adapt his/her previous mental frame. The entire series is about how Walter White gets deeper into the drug business and conducts the activities which were entirely new to him with superior skills. He therefore decided to alter his profession from teaching to drug dealing. However, witnessing the consequences of his decision, Walter was also shown to regret and try his best to bring the circumstances at a normal pace. Analysis The series ‘Breaking Bad Season 3’ does not promote people to sell drugs; rather it shows the negative consequences of continuous mental pressure led by dissatisfaction and the fear of inadequate time to accomplish the desired. For instance, in the episodes it has hardly been observed that Walter White gets benefited from the drug business. Due to this unethical profession, his marital relationship gets hampered signif icantly. Although by engaging in drug business, he might have earned significantly more than being in the teaching profession, Walter had lost the support from family for whom this huge earning was meant. As a consequence of drug business, Walter nearly lost his family, as Skyler decided to end her