Chemiluminescence

Chemiluminescence Professor Stewart CHM 151L-003 Group Members: Melissa Spegal Jessica Buddi March 19, 2013 Megan Cochran Professor Stewart Chemiluminescence March 19, 2013 Introduction: The objective of this lab was to carry out a systematic set of experiments in order to determine which combination of chemicals produce the brightest and longest lasting light, through chemiluminescence. Chemiluminescence can be defined as the emission of light by a chemical reaction that does not produce heat.Chemiluminescence can also be found in nature, where it is referred to as bioluminescence. This can often be found in many deep sea fish, algae, and fireflies. Luminol is one of many chemicals that can be used to create chemiluminescence outside of nature. Scientists are very interested chemiluminescence because it could be very helpful in many real life situations such as in glowsticks. The military uses high-grade glowsticks to have light in field situations where electricity is not an option .Marine biologists and deep sea divers also use those glow sticks to provide light and make new discoveries in the deeps of the ocean or underwater caves. During the chemiluminescence experiment the goal was to produce light during a series of trials in order to create light or a glow. In order to do this systematically, all chemicals were used to start and as it became apparent that some chemicals did not effect the outcome of certain trials they were eliminated one at a time.Because the trials were done systematically from one to the next, only one element of each trial was changed at a time,making it easy to single out the defining factors. There were many chemicals used during this experiment including Luminol, bleach, DMSO, NaOH, HCl, and H2O2. On the second day of trials, the Luminol was chilled to test the effects this would have on the glow we obtained through chemical reactions. Results of Day 1: Table 1:Trial | Luminol (D) | Bleach (D) | DMSO (D) | 1M NaOH (D) | 1M HCl | H 2O2 (D) | Results | A1 | TAD | 5* 1 | 5 2 | 5 3 | 5 4 | 5 5 | Orange color | A2 | TAD | 10 2 | 5 1 | 10 4 | 10 3 | 10 5 | Brown | A3 | TAD | 5 2 | | | | 5 1 | FLASH yellow | A4 | TAD | 3 1 | | | | 2 2 | Slight flash | A5 | TAD | 5 3 | | 5 2 | | 5 1 | * Flash | A6 | TAD | 5 3 | | 5 2 | | 10 1 | Less flash | B1 | TAD | 5 4 | 5 3 | 5 2 | | 5 1 | Flash | B2 | TAD | 5 4 | | 5 2 | 5 3 | 5 1 | Flash | B3 | TAD | 5 4 | 5 3 | | 5 2 | 5 1 | | B4 | TAD | 5 4 | | 5 3 | 10 2 | 5 1 | Small flash | B5 | TAD | 5 4 | 10 3 | 5 2 | | 5 1 | Blue flash | B6 | TAD | 5 4 | 10 2 | 5 1 | | 5 3 | 2. 7 sec flash | C1 | TAD | 5 3 | 11 2 | 5 1 | | 5 4 | Small blue flash after bleach | C2 | TAD | 3 4 | 10 1 | 5 2 | | 5 3 | 3. 2 sec flash | C3 | TAD | 5 4 | 10 1 | 5 2 | | 5 3 | Small blue flash | C4 | TAD | 3 4 | 5 1 | 10 2 | | 5 3 | 4 seconds flash/glow | C5 | TAD | 10 4 | 2 1 | 10 2 | | 5 3 | 6 sec glow | C6 | TAD | 10 4 | 10 1 | 10 2 | | 10 3 | 24. sec glow | D1 | TAD | 10 4 | 10 2 | 10 1 | | 10 3 | | D2 | TAD | 10 4 | 3 1 | 10 2 | | 5 3 | Small flash | D3 | TAD | 5 3 | | 5 2 | | 5 1 | Small flash | D4 | TAD | 1 4 | 10 1 | 5 2 | | 1 3 | Flash | D5 | TAD | 2 1 | 10 2 | | | 10 3 | | D6 | TAD | 4 1 | 10 2 | | | 10 3 | | , Asterick ( * ) – stirred Highlighted – Order of placement into the cell wells. The tad of Luminol was the first in every trial. (D) – Drops Pink Highlighted Row: Best Trial of the Day Results of Day 2: Table 2:Trial | Luminol (mL) | Bleach (D) | DMSO (D) | H2O2 (D) | NaOH | Results | A1 | TAD | 10 4 | 10 1 | 10 3 | 10 2 | Quick glow – odor | A2 | 1 1 | 5 2 | | 5 3 | 5 2 | glow | A3 | 1 1 | 5 4 | 5 2 | 5 3 | | glow | A4 | 1 1 | 5 3 | | 10 2 | | glow | A5 | 1 3 | 5 4 | 5 2 | | 10 1 | glow | A6 | 1 1 | 5 3 | | | 5 2 | glow | B1 | 1 1 | 5 3 | | 5 2 | | * ! long glow | B2 | 1 1 | 5 4 | 5 2 | 5 3 | | * | B3 | 1 1 | 5 3 | 5 2 | | | *! 36 sec glow | B4 | 1 1 | 10 3 | 10 2 | | | *! 23 seconds | B5 | 1 1 | 5 3 | | 10 2 | | * Bright but shorter | B6 | 1 1 | 5 3 | 5 2 | | | *! | C1 | 1 1 | 5 4 | 10 2 | 2 3 | | *! | C2 | 1 1 | 5 3 | 20 2 | | | *! 29 Secs | C3 | 1 3 | 1 2 | 1 1 | | | *! | Chilled – *Stirred – ! Highlighted – Order of placement into the cell wells. The tad of Luminol was the first in every trial. – Drops Pink Highlighted Row: Best Trial of the Day Table 3: MSDS Chemical Name | Ingestion | Skin Contact | Disposal | Inhalation | Luminol | Loosen clothing, if not breathing perform mouth to mouth recessitation. Do not induce vomit. | Wash with lots of water. Cover skin with emollient. | Not Available | Rest. Ventilate Area, seek medical attention. | Bleach | Drink Water. Do not induce vomiting. | Wash skin with water for 15-20 minutes. | Containerize and use absorbants on liquid. | Remove, fresh air. DMSO | Loosen clothing, if not breathing perform mouth to mouth recessitation. Do not induce vomit. | Wash with soap and water. | Waste container. | Fresh air | Discussion: The best trial of the exper iement was on day two, trial B3. During that trial 1 mL cold Luminol was used and added to the cell well first, followed by five drops of DMSO, and five drops of bleach in that order. This was the best trial because it yielded the brightest and longest lasting glow compared to all of the others. On the trial before the same exact method was carried out except there was hydrogen peroxide in the mix also. In order to change things up, the peroxide was eliminated and that proved to be an effective tactic.It became blatently apparent that some of the chemicals were not needed entirely including the NaOH, and HCL. By the trial B6, on the second da,y the HCL had been eliminated. Hydrogen peroxide was never eliminated but it was noted as in trial B3 on the second day that the longest trial was performed without it. Many factors affected the results of each trial, some definitely more than others. For instance, for the entire first day, all trials were performed with the solid form of Lumin ol, and on the second day, starting with trial A2, the Luminol stock solution was used. As reflected in the table above, the stock solution created a much longer glow on average.To furthur amplify the Luminol's effect from trial B1 on day two, the Luminol stock solution was used in a chilled form which created the best results of both days as seen in trial B3. It also became apparent that stirring the chemicals helped maintain the glow longer per trial C2 on day two. Luminol was the only chemical that was chilled, all other chemicals remained room temperature. The order of chemicals was an important factor in creating chemiluminescence as well. During the beginning trials of the first day the best order to add the chemicals was not apparent, but by trial C4 one thing was certain, the luminol needed to be the first chemical placed in the well. In trial C3, when Luminol was added last, there was only a small blue flash with no lingering glow at all.Also, by the second day, it was real ized that the bleach was reacting with the Luminol and if the bleach was added last, the glow did not fizzle out as quickly such as in trial B4 on the second day, which had a 23 second glow, subsequently improving results on day two as opposed to the first day. After completeing much more in-depth research on the topic of chemiluminescence other checmicals had been foun, that if the experiment was done over would have been requested, such as copper nitrate, which would have significantly extended the length of the glow. Conclusion: Using 1mL of chilled Luminol stock solution, five drops of DMSO, and five drops of bleach, in that order and stirring at the end, the longest glow of 36 seconds was created as per trial B3 on day two. The bleach reacting with the Luminol gave a bright glow, and the DMSO aided in the length of time the trial glowed.

Court History and Purpose Essay

Abstract â€Å"The court represents the collective conscience of society, serving as an instrument for expressing the revulsion people feel for those who commit particularly heinous crimes† (Siegal, Schmalleger, & Worrall, 2011). This paper will discuss the history of court and its purpose. It will also define the dual court system. It will describe the role that early legal codes, the common law, and precedent played in the development of courts. It will identify the role of courts in present criminal justice. The Purpose of Court The purpose for court is simply to find guilt or innocence in someone who has been charged of a crime or to settle disputes in civil matters. Such matters must have the legal authority of a judge to be considered a court. In many courts the adversary process is used, allowing both sides to give any evidence, arguments, or persuasion to support their case. A judge or a jury will decide whose case is credible based on the arguments given. In the past, disputes were handled informally and not in a civilized manner. Some people would take matters into their own hands, which led to violence. In today’s society, all matters are handled in a formal and civilized manner. The Dual Court System The judicial branch of the U.S. Government is considered a dual court system because it separates the federal court from the state court. â€Å"The dual system is advantageous and desirable because it parallels federalism, a system of government where power is constitutionally divided between a central governing body (i.e., the federal government) and various constituent units (i.e., the states) (Siegal, Schmalleger, & Worrall, 2011). The establishment of a dual court system began in colonial period. â€Å"The  United States Constitution mandated the establishment of a Federal court system in 1789, when each of the original 13 Colonies already maintained its own comprehensive court system (2013). In federalism, it is required that laws are made by the federal government and the state. Although the dual court system is â€Å"desirable†, it can also cause confusion between the federal and state courts. This is because some cases can be heard at both federal and state levels, and it can be hard to determine how the case should be handled. The Development of Courts The development and influences of the U.S. judicial system came along during the time this country was started. In the beginning, religion played a major part in making the laws of the country. The early legal codes played a significant role in the judicial system as well. These legal codes were used back 1760 B.C. One of the most known legal code is the Code of Hammurabi, who was the king of Babylon. The philosophy behind this code is retribution. Other early legal codes came from ancient Rome. The Twelve Tables were written in 450 B.C. They were said to be the first written legal code. The Twelve Tables was based on strong retribution, establishing the â€Å"eye for an eye† theory for justice. Because the early legal codes were considered to be harsh and informal, it was paved the way for the changes of the judicial system to develop a more formal and civilized system. Common law emerged in England during the Middle Ages and was applied within British colonies across continents (2010). Its role gave judges authority to make decisions as they saw fit. There was no legislature or law making process during this time. Judges would also record the decisions, which led to precedent. â€Å"Precedent refers, generally, to some prior action that guides current action† (Siegal, Schmalleger, & Worrall, 2011). In new cases, judges could apply precedents in their decision, which is how makes it common law. Common law has been implemented into today’s judicial system by following previous courts decisions in cases. It is unlikely that once a judge makes a decision that it will be reversed or changed from precedent. The Present Role of Courts In today’s judicial system, there are two roles involved in courts:  adjudication and oversight. Adjudication means that judges decides if a person is guilty or innocent when they have been involved in a criminal act. Appellate courts make sure that lower courts are applying the correct laws in court proceedings. Having the appellate courts verify all laws ensures that if any mistakes or incorrect information was given by the judges, they will be held accountable. Courts oversee the operations of criminal justice officials to provide a level of indirect supervision. The appellate courts decide laws that will determine how police officers to their job on the street (Siegal, Schmalleger, & Worrall, 2011). Oversight is only necessary when the appellate courts are involved in a decision. If such decisions are publicized, the appellate courts will be involved also. It all depends on the severity of the incident involve by police officers will it be brought to the courts attention . Conclusion The judicial system has indeed changed over the course of time. History has shown that the development of the judicial system was fathered from England and other ancient heritages that set the foundation of how laws are created and implemented into today’s society. More common law is being practiced in many states across the nation. Some of the practices were very informal and retributive, however in today’s court system, court proceedings are in a formal and civilized setting. References Siegal, L.J., Schmallegar, F., & Worrall, J.L (2011). Courts and criminal justice in America. Upper Saddle River, NJ: Pearson. The common law and civil law traditions. (2010). The Robbins Collection. Retrieved From University of California at Berkeley School of Law (Boalt Hall): http://www.law.berkeley.edu/library/robbins/CommonLawCivilLawTraditions.html Understanding the U.S. court system in a glance. (2013). Retrieved from http://court.laws.com/court-system.

Bullying At School

Unfortunately we cannot deny the existence of bullying among children. According to the American Psychological Association, forty to eighty percent of school-age children experience bullying at some point during their school careers. Bullying is unwanted, aggressive behavior among school aged children that involves a real or perceived power imbalance according to the Stopbullying Website, A federal government website managed by the U. S. Department of Health and Human Services. Four different type of bullying are physical, verbal, covert, and cyberbullying.Bullying leaves physical and psychological consequences on the victim, bully, and also other children involved. Different kinds of bullying have short term and long term consequences that temporarily and permanently affect the bully and the bullied. There are four basic forms of bullying among the children. The first and most typical kind of bullying is physical bullying; this kind of bullying includes any physical contact like pun ching, hitting, pushing, or any other forms of physical abuse.Taking and destroying other children’s belongings by force is considered a kind of physical bullying. The second kind of bullying is verbal bullying, such as using humiliating names, joking about the person’s parents, religion, gender, or the way that they look. A good example of this kind of bullying is making fun of the way another kid walks, runs, or even talks. The third kind of bullying is covert bullying like spreading rumors or stories about someone else. For example a rumor like a boy in your class is a bed wetter or plays with dolls.Also excluding someone from a group or team, and threatening to such level that the victim does whatever bully request other examples of covert are bullying. The most recent form of bullying is cyber bullying. Cyber Bullying is done by sending messages, pictures, emails, text or any information using electronic devices like computers or cell phones. As a result of short- term and long-term consequences of being bullied the victim will experience immediate physical or mental health issues and more serious problems in the future.The bullying victims have more sleeping difficulty, dropping grades, sadness, low self esteem and headaches. In general, the victims have few or no friends due to their anxiety level and their feeling of isolation. Feeling lonely and sad can have an effect on the victim’s learning abilities as well as school success; the victim becomes afraid of going to school or work. Another result of bullying is that the victim might become violent towards him or her selves and other children, and it is a huge possibility that a lot of school shootings can be related to this issue.In some cases bullying can go on for a long period of time and the victim can have thoughts of suicide and possibly commit a suicide. A recent incident of committing a suicide because of bullying was a thirteen year old girl, who was bullied by her girl fr iends in the school. According to New York Daily News, she committed suicide by jumping off a cement factory tower on September 10, 2013, in Florida. Long-term consequences can be almost as bad for the bully as for the bullied. Bullies are more prone to criminal behavior than others and are more likely to end up using alcohol or drugs in adolescence and as adults.For example while they are kids they may commit shop lifting or drop out of school; also as a grownup they may using a gun to prove their domination on other people, getting involve in physical fights, or doing other violence activities. It is very hard for bullies to deal with other people who are physically stronger. The Bullies cannot accept to be a victim, so they try hard to overcome the stronger opponent and to ignore embarrassment in front of other children by even getting into a big trouble or committing a crime.Also engaging in early sexual activity is another risky behavior of the bully children. The bully’ s desire for power will affect their behavior with their wife and children in the future such as being abusive toward their romantic partners, spouses, or children as adults. However, some of the adult bullies will regret their behavior, and as a result of becoming depressed and weak, they will commit a suicide. Some people think that bullying is a part of childhood, and children will become stronger and learn to stand up for themselves.However, a lot of research shows that bullying in fact can cause negative social, emotional, and academic consequences. The four basic kinds of bullying are physical, verbal, covert, and cyberbullying which all have a profound effect on children’s lives. Depression, anxiety, sadness, and loneliness are some of the negative effects of being bullied. In contrast, drugs and alcohol abuse, criminal convictions, and violent behaviors are some of the negative effects of bully children.The best way to address bullying is to stop it before it starts. If bullying behaviors happen in the school, the bully and the victim’s parents and school officials must meet immediately. They should solve the matter through child adviser and find out the reasons behind the behavior. They are responsible to show the students how important this issue is and what are the consequences of the bullying behavior. Also all parents must educate themselves and their children about the bullying behavior, and even use professional help if it is needed.

What factors causes the lack of trust in project management teams Essay

What factors causes the lack of trust in project management teams - Essay Example Today most of the organizations embrace the notion of groups or teams. Teams have become the core unit in many organizations. Part of this based on the fact that groups are effective in solving problems and learn more rapidly than individuals. The above definition of Team itself explains that a team could be formed for the specific purpose that may be to execute and manage a specific project or projects. This team can be called as project management team. Teams are particularly important when problems and decisions involve very uncertain, complex and important situations and when the potential of conflict is great. Teams are clearly more appropriate when there is not an immediate time pressure. (Ware, 1993, 1994). But teams can also bring about the worst in us. Teams can result in a situation where the whole is less than the sum of its parts. Teams can be a big waste of time and energy, can enforce norms of low productivity and can exploit, stress and frustrate members. Trust plays t he main role in functioning of any project management team. If the trust among team members is low then timely completion of projects and proper functioning of the team could not be assured.During the last few years there has been an increasing acknowledgement of the importance of trust in business interactions within the management and organizational literature. (Kramer& Tyler, 1994. Mayer, David &Schorman, 1995). Trust enables cooperation and becomes the means for complexity reduction even in situations where individual must act with uncertainty because they are in possession of ambiguous and incomplete information. It is not therefore surprising that in the current age of global and digital economy and virtuality (Tapscot, 1996) there has been an enormous interest in trust. According to Platt, Trust is essential to any team whether virtual or real. Real teams may interact day to day and chances of loosing trust may be lower but for the virtual teams where the possibility of day t o day interaction or face-to face interactions are almost negligible, possibility of loosing trust is much higher. Trust is a state of a positive confidence through subjective expectation regarding the behaviour of somebody or something in a situation, which entails risk to trusting party (Baba, 1999). It is a dynamic and emergent social relationship that develops as participants interact with each other over time and depending on situation. Jarvenppa and Leidner have conducted one of the most detailed researches, which studied Trust and Teams thus far. It highlighted significant difference in the behaviour and strategies between high and low trust teams emphasize on the clarity of roles and responsibilities among team members. Panteli and Duncan in their study of virtual teams, projects managed by virtual organizations, which involves a team of geographically far off located contractual employees, finds that the content of communication both formal and informal as well as frequency helps in building and maintaining an interactive social situation and can act as the frame for reference in constructing the trust relationship. Finally after going through different studies we can classify the different factors, which causes lack of trust among project team members. Shared goals are and should be one of the important aspects of the project management team, which cannot be taken for granted. Lack of trust may be due to lack of awareness about shared goals among team members. Generally most of the members of the team may or do not know the goals of the team and everybody have their understanding and perceptions about goals which brings distrust among team member

Individual Behavior and Performance Essay Example | Topics and Well Written Essays - 750 words

Individual Behavior and Performance - Essay Example The annual feedback on the work of each of the employees is required from the manager, for to define, whether the current position of the worker is right for him. Performance appraisal is used for to evaluate, whether the employees labor is worth of the money the company spends on him, and whether he is used rationally in the company. Performance appraisal defines whether the workers performs his tasks fully, whether he is suitable for the type of work he is doing, it evaluates the quality of his work. It is the tool that lets the administration see which of the employees deserves the promotion or/and a pay rise, and which one has to be fired because of the incompetence or the poor quality of work. The characteristic feature of aviation is that there the team work is of vital importance. For to satisfy the clients, the plane's crew has to work together, aiming the same goals. Thus, the performance appraisal of the crew is also conducted, apart from the personal performance appraisal. The task of the manager, which performs performance appraisal, is to define the list of the employees goals, and chores, and then evaluate the quality of fulfilling the chores, and to define, whether the worker reached the goal that were set before him. ... They consider the individual performance appraisal to be the most effective and significant, and make their conclusions about the best place for the person in the company guided by them, forgetting that even the best worker will lower the productivity of the group he is employed in case his team work skills are poor. Performance appraisal is quite a complicated managerial technique; it requires the deep knowledge in business, management, and some other social sciences. But interpreting the results of the appraisal, deciding what should be done for to improve them, or what is the best position for the worker, requires the background in psychology of the relationships on the workplaces, and the motivation strategies. The performance appraisal techniques foresee the existence of the form, which is the same for every worker. These forms usually don't consider the existence of the individual differences, the peculiarities of the each worker. Thus when making a conclusion considering the performance of every employee, the manager has to consider his individual features, and define, what should be done to improve his/her performance. The goal each manager follows is to increase the productivity of his employees. The authors of the book Creating Workplace Community: Motivation Solutions, Ideas and Philosophies for Motivating Ourselves and Other, note, that Performance is considered to be a function of ability and motivation. Thus it is vital to motivate the workers for to reach the maximum productivity. John Marshall Reeve offers several techniques for motivating the employees: Positive reinforcement / high expectations Effective discipline and punishment Treating

Florida lawmaker pushes bill to end FCAT Essay Example | Topics and Well Written Essays - 1250 words

Florida lawmaker pushes bill to end FCAT - Essay Example Widespread reports of racial profiling that led to incidents like the one in Cincinnati, where police violently clashed with black protesters for three days, have called the attention of the public and inevitably, many politicians. Cloud et al observes a nationwide scrambling for legislations banning racial profiling as a tool in police operations. The writers anticipate, however, a problem in implementing a sweeping prohibition of racial profiling as was being contemplated by the End Racial Profiling bill, then pending in 2000 in Congress. One possible outcome of such a law is a police force hesitant to do their jobs, such as what happened after the Cincinnati riots where arrests dwindled in numbers despite an opposing direction of crime incidences. Another is the unlikely feasibility of a mechanism that could accurately predict when or how racial profiling is actually being committed. The article is a well-written, subtle piece of writing imbuing as much logic and reason to impress the readers of its objectivity to cushion a position that leans towards the less popular view in this highly charged issue. The general impression that one gets after reading the article is that the writers wanted to impress the American readers of the folly of a sweeping anti-racial profiling law, considering the absence of a mechanism that could exactly measure racial profiling. Thus, the article begins by taking into account the perspectives of police, particularly from one who whines about â€Å"guilt by uniform.† The article also points out that there is no exact definition of what racial profiling is and hence, the consequent difficulty in telling the police to stop employing it, as the wrong itself defies precise and conclusive definition (Cloud et al 2). Still later, it stresses the difficulty in gauging the actual amount of racial profiling being practiced by the police force (Cloud et al 3). Understandably, the writers chose to approach this subject in a very subtl e way, presenting facts and reports as much as possible and letting interviewees mouth relevant data, which nevertheless, support the writers’ point. The article does not make much use of ‘pathos’ - the writers seemingly holding back perhaps out of fear that they would be stirring the hornet’s nest. On the other hand, the writers attempt to resort to the appeal of logic and reason by sprinkling an abundance of interviews, reports and factual accounts of events throughout the article that represented their perspectives rather than enunciating these views themselves. The appeal to logic and reason seems to be employed precisely for the readers to forget the emotional underpinning of the issue, which is not bad except that it makes the writers look like fence-sitters at times with no real position of their own leaving the readers confused as to what their objectives really are. Thus, as the writers allow some police personnel to recount the gloom that pervade s their respective agencies leaving their hands tied with charges of racial profiling looming above their heads like the sword of Damocles, the article followed this up with details of racial profiling incidents such the â€Å"flying while black† incident involving the seizure of $7,000 from a black businessman by the DEA on the ground that it was

Professional communication Essay Example | Topics and Well Written Essays - 500 words

Professional communication - Essay Example I want to emphasize that taking care of you, our customer, remains our highest priority and we thank you for your patience. If you have any further questions, or require assistance locating an Audi dealer, please visit audi.com or call us directly at 800-822-8987. First of all, as an important rule of business proposal letter writing serves the need to initially define who will be a reader of a letter, or, if it may have multiple recipients, what is its audience. In our particular case the letter is addressed to a concrete person, but there is every reason to believe that this letter was actually sent to many people, and thus is audience-oriented in nature. Its audience then is a group of people who have purchased a certain model of Audi, i.e. the existing clients of the company. Although the signature of the letter belongs to the Vice President of the company, the authorship of the letter is presented as if being from Audi company itself. In this situation such an authorship sets clear relations of seller-buyer between the sender of the letter and its recipients. Moreover, in this case the relations emerge on the ground of sellers responsibility before customers.