Technology For Humans Essays - Technology, Human,

Technology For Humans A Comment about Technology It is my understanding that in the past 200 years, technology has advanced at an astonishing rate. Mans advances in modern science have led to several cures for once common fatal diseases. I believe the average life span of Americans in the early 1800s was something like 40-45. At present an American man can expect to live to about 76. I believe fundamentally, as humans, we have a desire to live eternally. In part, technology exists for that reason. Also, technology exists to better our lives. Just how much better our lives have become over the centuries could be argued. I see two sides to this issue. One train of thought says that technology has brought us leisure, comfort and knowledge. Another train of thought proclaims that we have become slaves to our jobs and the dependence of technology. Cogs in a great combine. Technology

First Impression Essay Example

First Impression Essay Example First Impression Essay First Impression Essay Eric ZavalaEnglish 101Professor Terry Benjamin14 September 2014My First Impression in English 101 The first day in my English 101 class has brought me excitement and eagerness that will help me to be successful in the class. Unlike the other English classes I took I find English 101 as entertaining and something to look forward every day. The best part of English 101 is that this class can allow me to show my strengths and weakness of reading and writing. English 101 provides me with a great opportunity to improve on my writing skills, which is an area I need assistance. My first impression of English 101 is that it can be beneficial to students, including myself who are seeking improvements in making my writing better, it will allow me to make my vocabulary to expand by reading books and will help me to accomplish my expectations in the class. My first impression of English 101 is that it can benefit myself by improving on my writing and making me a better writer. Writing essays and research paper has been considered one of my weakness subject because of my organization and grammar usage that is affecting my writing. As a writer, I bunched my ideas everywhere and there is no sense what I want to write about. On the other hand, one of my strengths of writing is that I can write a clear thesis statement and my brainstorming is well written. English 101 is a class that will prepared me to become a improve writer and will allow me to receive the assistance of students who will be happy to help my writing and make it better. Due to my professor expectations of English 101, I understand that in order for myself to improve on my writing I must show effort and dedication to my writing. This English class will provide me a great opportunity to express my ideas of writing and provided the help of my fellow peers who needs my assistance to become successful. Expanding on vocabulary is an important key component that will help a student to improve on

Descartes and the Existence of God Essay Example | Topics and Well Written Essays - 1000 words

Descartes and the Existence of God - Essay Example Descartes meditation about the existence of God cannot be used to serve as proof of the existence of an Evil Demon. This is because Descartes establishes a clear line of thought that is specific to his a priori existence of God. Central to his argument is the fact that his knowledge of God is anchored on a distinct idea on the existence of a supreme being (Marion, 2008). As such, there must be the existence of an idea first of all before a given claim of body of knowledge is verified. For Descartes, this distinct idea resided in his mind (Nolan, 2011). It is this idea that gave him the essence of God as a supreme being. It is an idea that could not be verified through empirical methods. The existence of an Evil Demon, in line with the thinking of Descartes, can only obtain if it is backed by a distinct idea. There must first exist the essence of the Evil Demon that is crystallized into Descartes mind in order for him to make a claim about the existence of such a being. One of the cen tral arguments upheld by Descartes is that essence implies existence. It would follow logically that the absence of essence effectively negates all possibilities of existence. Without the essence of the Evil Demon in distinct form it would be vacuous to assert any claim of such an existence. Therefore, this would mean that Descartes could claim the existence of God but refrain from making any assertions on whether or not some Evil Demon actually exists. Proof of such existence could be derived from.

Brand Extension Marketing Plan Research Paper Example | Topics and Well Written Essays - 500 words

Brand Extension Marketing Plan - Research Paper Example Lavington Green Village is an estate that is mainly made up of high class persons who live luxurious lives. Therefore, the customers mainly demand products that will improve their living standards or increase their lifestyles. Low class products do not have an impact on the market since the people already have the product. This is known from the statistics taken by Clean-So Company. Secondary market trends; these will be short term price fluctuations in the market which may last for only a few days or weeks. Under this trend, the prices may rise or may fall. This trend will affect the way in which the customers view the product because; customers may generalize a price increase to have affected all the products in the market (Winer, 2004). Secular market trend; under this trend, customers are likely to change their tastes and preferences since the trend is long-term. Primary market trend; this trend will also influence the customers since it lasts for a year or more. Therefore, by at the end of one whole year the customers will have changed to other products (EconomyWatch, 2010). The market is growing since; statistics show that there has been a continuous increase in the users of the products each year. The population also keeps on increasing and hence, the users of the products keep on increasing in number. The growth trends observed includes cyclic and exponential trends. This is evidenced by the data which shows that the numbers of customers have been increasing exponentially. A growing market implies an increasing demand and hence; the company will address it by increasing the output. Strengths; the company has three key strengths which include; it has a strong marketing unit and hence can attract a large number of customers. The company also has qualified and experienced employees. Thirdly, it has the strength of being innovative and creative. However, the company

Personal values Essay Example | Topics and Well Written Essays - 1000 words

Personal values - Essay Example This is of specific reference for me as I believe that the advantages of a diversified workforce can provide various benefits to an organization as a whole. This is due to the fact that each culture has its own positive input into the business mix, if managed correctly. This appears to be the case, as the performance appraisals reveal that a more nurturing and encouraging environment is evident from the analyses of these appraisals. The entire customer service ethos within Kudler is remarkable, as this is revealed in the mission statement of the company. Issues such as professional courtesy are of specific relevance, in terms of their customer care. In my appreciation of these factors, I am in total agreement of the customer service aspect as the correct treatment of the customer can, and normally does contribute to the business’ success and overall profit. Incorporated in the consumer care, Kudler continues to strive for additional choices of products for the customer, and although at times this may prove to be expensive in terms of the cost of holding the inventory, it will rather encourage the repeat customer as well as the addition of new customer seeking such a large variety in terms of their shopping requirements. The fact that the Kudler organization is a small business and is poised for growth, contributes to my personal value of growth. This represents an opportunity for growth and advancement within the business, as it expands and opens more stores across California and further when they decide to expand beyond the Californian borders. This in turn will offer the opportunity of progressing from a junor management role into a more senior management position as the company expands. This ties in with my personal value of personal growth, which can be applied as the organization grows into a larger and more expansive retail operation, as it grows towards the planned San Francisco store and expansion. Additionally

Different Reactions From The Brine Shrimp Biology Essay

Different Reactions From The Brine Shrimp Biology Essay The objective of the Pharmacology Lab is to find the lethal chemical(s) or the LD50 relevant to a certain genus. In order for a chemical to be considered the LD50, 50% of the population of the organism present in a container must die. A total of three trials and four tests are completed to determine whether or not the chemical has the ability to kill the brine shrimp. The three trials contain 5mL of the chemical in each container, while the four tests have different amounts of the chemical in each container. The amount of water used for both the trials and tests remain constant at 40mL. Once the correct amount of the required substances and brine shrimp are placed into their respective and labeled containers for both trials and tests, they are then moved under a desk light. For the next duration of time, the death rate of the brine shrimp and the physical or behavioral changes visible are observed and recorded. After performing the experiments, the data shows that a great number of t hese selected regular household items have deadly chemicals in them that can kill other living organisms if given the right amount of dosage, including humans. Out of all five products, the LD50 was only found in soda and hydrogen peroxide. Lemon juice, nail polish remover, and hand sanitizer were not considered the LD50 because the death rate percentage was higher than 50%. This research provides a better understanding of how toxic household chemicals are. Products that were created for consuming such as the Lemon Juice and Soda were found to instantly and over a certain amount of time, kill the brine shrimp once in contact. II. Introduction In this experiment, one of the main purposes is to find the LD50 of several household chemicals on Brine Shrimp. LD means lethal dose of a certain product. The LD50 formula gives the estimate of deaths of half a population when receiving the molarity of each chemical. A possible solution to this problem is to perform and experiment where an organism is tested on with different types of chemicals for the death rate. Brine shrimp, the genus used, are aquatic crustaceans that can be grown by adding water and brine shrimp eggs into a tank. This process takes approximately two days. Brine shrimp lives in salt water, but can also survive in regular water for 24 hours. Completing this experiment determines whether they can survive a certain about of chemicals in different time intervals. This lab contains five different chemicals including: nail polish remover, hydrogen peroxide, lemon juice, hand sanitizer, and lemon soda. These household chemicals are tested as the positive controls, whil e the negative control is water. With five positive controls, there would be different results from each chemical. As the experiment takes place through four tests; each containing 3 trials; the observation of the deaths of brine shrimp demonstrates the amount of time they can survive in new obscure habitats. The test of each chemical shows whether there are traces of deadly substances, which could help find the measures of toxicity in each chemical. Testing the toxicity by molarity and time shows the maximum amount of toxicity that humans can handle to be able to survive. The experiment is an example of how living organisms react to chemicals. The brine shrimp will play the role of the organism. However, different organisms will have different reactions depending on their adaptations and physical traits. As the brine shrimp take in the chemicals, the inability to survive increases. The death of the aquatic crustaceans shows how toxic harmless household chemicals can truly be.This lab will explore the ingredients from the five chemicals used. The observations of the LD50 will determine which chemical is deadlier than the others, causing the public to be more aware of these fatal factors. III. Methods: The brine shrimp are grown by adding water and brine shrimp eggs into a tank. Brine shrimp takes two days to mature enough to be experimented on. The lethal chemical(s) or the LD50 are found by placing different substances mixed with water into containers with nine brine shrimp. Through a series of tests and trials, the lethal chemicals are distinguished. A total of three trials and four tests are completed to determine whether or not the chemical has the ability to kill the brine shrimp. The three trials contain 5ml of the chemical in each container, while the four tests have different amounts of the chemical in each container; (5ml, 10ml, 15ml, and 20ml). The amount of water used for both the trials and tests remain constant at 40ml. Once the correct amount of the required substances the brine shrimp are placed into their labeled containers for both trials and tests. Next, the Brine shrimp are moved under a desk light because they are attracted to any form of light. The death rate and physical or behavioral changes of the brine shrimp are observed and recorded in tests with intervals of 10-minute trials and 5-30 minutes. This lab consists of four tests and three trials for five different chemicals to find the LD50. The positive controls include: Super Chill Lemon Lime soda, hydrogen peroxide, House Recipe lemon juice, 2.2 oz. of Assured Aloe Vera scented hand sanitizer and 2.2 oz. of ONYX Professional lavender scented nail polish remover, while the negative control is water throughout the entire experiment. For each test, there are three trials performed beforehand. Twenty seven brine shrimp are needed for the trials. For each of the three trials, nine brine shrimp are obtained from the twenty seven. Then, 40mL of distilled water is added to the brine shrimp container through pipettes and graduated cylinders; the total volume of water for each trial is 40mL in order to maintain consistency. From each chemical, 5mL are added into the labeled containers of the 40 mL distilled water. Once all substances are added, the containers are placed under direct light from a desk lamp because brine shrimp are att racted to light. Through five tests after the three trials, various amounts of nail polish remover, hydrogen peroxide, lemon juice, hand sanitizer, and Sprite soda are added to its assigned containers. For each test, there will be four containers for the different amounts used of each chemical. The first container contains 5mL of the chemical while the other three containers will have an increase of 5mL from the prior container. This process will be done five times for the five chemicals used. The counts of deceased shrimp after each time interval are recorded over a course of 5 minutes to 30 minutes in percentages. Different reactions from the brine shrimp were recorded in the data table as well as pictures being taken. This procedure was used according to the outline given in order to achieve the objective of this lab. Given a certain the amount of time, three trials and four tests were used. In the procedure, several changes were included, instead of adding 40ml of water with the nine brine shrimp, 40ml of water was added to the desired chemical first to have enough time to collect the brine shrimp for the specific trial and test. IV. Data Data table for Trial: Peroxide (3 trials total) @ (5ml of chemical) PH: 7 Time interval Observations Deaths (%) Deaths (#) 10 mins move erratically; attracted to light; hitting against the cup 0% 0 10 mins move erratically, attracted to light 11% 1 10 mins move erratically, attracted to light 11% 1 Data table for Test: Peroxide 5mL Time Interval Observations Deaths (%) Deaths (#) 5 min has bubbles 0% 0 10 min has bubbles 0% 0 15 min has bubbles 22% 2 20 min has bubbles 22% 2 25 min has bubbles 33% 3 30 min has bubbles 33% 3 Data table for Test: Peroxide 10mL Time Interval Observations Deaths (%) Deaths (#) 5 min has bubbles 44% 4 10 min has bubbles 44% 4 15 min has bubbles 44% 4 20 min has bubbles 44% 4 25 min has bubbles 44% 4 30 min has bubbles 44% 4 Data table for Test: Peroxide 15mL Time Interval Observations Deaths (%) Deaths (#) 5 min has bubbles 33% 3 10 min has bubbles 44% 4 15 min has bubbles 44% 4 20 min has bubbles 55% 5 25 min has bubbles 55% 5 30 min has bubbles 55% 5 Data table for Test: Peroxide 20mL Time Interval Observations Deaths (%) Deaths (#) 5 min has bubbles 33% 3 10 min has bubbles 33% 3 15 min shrimp turn orange 44% 4 20 min has bubbles 55% 5 25 min has bubbles 55% 5 30 min has bubbles 55% 5 Data table for Trial: Nail Polish Remover (3 trials total) @ (5ml of chemical) PH: 7 Time interval Observations Deaths (%) Deaths (#) 10 mins hitting against the cup under the light 22% 2 10 mins hitting against the cup under the light 22% 2 10 mins hitting against the cup under the light 22% 2 Data table for Test: Nail Polish 5mL Time Interval Observations Deaths (%) Deaths (#) 5 min has bubbles 11% 1 10 min has bubbles 22% 2 15 min has bubbles 22% 2 20 min has bubbles 55% 5 25 min has bubbles 66% 6 30 min has bubbles 66% 6 Data table for Test: Nail Polish 10mL Time Interval Observations Deaths (%) Deaths (#) 5 min has bubbles 100% 9 10 min has bubbles 100% 9 15 min has bubbles 100% 9 20 min has bubbles 100% 9 25 min has bubbles 100% 9 30 min has bubbles 100% 9 Data table for Test: Nail Polish 15mL Time Interval Observations Deaths (%) Deaths (#) 5 min has bubbles 100% 9 10 min has bubbles 100% 9 15 min has bubbles 100% 9 20 min has bubbles 100% 9 25 min has bubbles 100% 9 30 min has bubbles 100% 9 Data table for Test: Nail Polish 20mL Time Interval Observations Deaths (%) Deaths (#) 5 min has bubbles 100% 9 10 min has bubbles 100% 9 -15 min has bubbles 100% 9 20 min has bubbles 100% 9 25 min has bubbles 100% 9 30 min has bubbles 100% 9 Data table for Trial: Lemon (3 trials total) @ (5ml of chemical) PH: 2 Time interval Observations Deaths (%) Deaths (#) 10 mins some floats 100% 9 10 mins transparent with some orange 100% 9 10 mins completely transparent 100% 9 Data table for Test: Lemon 5 mL Time Interval Observations Deaths (%) Deaths (#) 5 min completely transparent 100% 9 10 min completely transparent 100% 9 15 min completely transparent 100% 9 20 min completely transparent 100% 9 25 min completely transparent 100% 9 30 min completely transparent 100% 9 Data table for Test: Lemon 10mL Time Interval Observations Deaths (%) Deaths (#) 5 min completely transparent 100% 9 10 min completely transparent 100% 9 15 min completely transparent 100% 9 20 min completely transparent 100% 9 25 min completely transparent 100% 9 30 min completely transparent 100% 9 Data table for Test: Lemon 15mL Time Interval Observations Deaths (%) Deaths (#) 5 min completely transparent 100% 9 10 min completely transparent 100% 9 15 min completely transparent 100% 9 20 min completely transparent 100% 9 25 min completely transparent 100% 9 30 min completely transparent 100% 9 Data table for Test: Lemon 20mL Time Interval Observations Deaths (%) Deaths (#) 5 min completely transparent 100% 9 10 min completely transparent 100% 9 15 min completely transparent 100% 9 20 min completely transparent 100% 9 25 min completely transparent 100% 9 30 min completely transparent 100% 9 Data table for Trial: Hand Sanitizer (3 trials total) @ (5ml of chemical) PH: 7 Time interval Observations Deaths (%) Deaths (#) 10 mins shrimp turns orange 33% 3 10 mins all on the bottom 33% 3 10 mins against the wall 22% 2 Data table for Test: Hand Sanitizer 5 mL Time Interval Observations Deaths (%) Deaths (#) 5 min turns orange 66% 6 10 min turns orange 66% 6 15 min turns orange 77% 7 20 min turns orange 77% 7 25 min turns orange 100% 9 30 min turn orange 100% 9 Data table for Test: Hand Sanitizer- 10mL Time Interval Observations Deaths (%) Deaths (#) 5 min turns orange 22% 2 10 min turns orange 33% 3 15 min turns orange 55% 5 20 min turns orange 55% 5 25 min turns orange 88% 8 30 min turns orange 100% 9 Data table for Test:Hand Sanitizer- 15mL Time Interval Observations Deaths (%) Deaths (#) 5 min turns orange 44% 4 10 min turns orange 66% 6 15 min turns orange 66% 6 20 min turns orange 66% 6 25 min turns orange 77% 7 30 min turns orange 100% 9 Data table for Test: Hand Sanitizer- 20mL Time Interval Observations Deaths (%) Deaths (#) 5 min turns orange 88% 8 10 min turns orange 88% 8 15 min turns orange 100% 9 20 min turns orange 100% 9 25 min turns orange 100% 9 30 min turns orange 100% 9 Data table for Trial: soda (3 trials total) @ (5ml of chemical) PH: 7 Time interval Observations Deaths (%) Deaths (#) 10 mins bubbles 22% 2 10 mins some are orange 22% 2 10 mins some are orange 22% 2 Data table for Test: soda 5 mL Time Interval Observations Deaths (%) Deaths (#) 5 min bubbles 11% 1 10 min bubbles 11% 1 15 min bubbles 11% 1 20 min bubbles 11% 1 25 min bubbles 22% 2 30 min bubbles 22% 2 Data table for Test: soda 10mL Time Interval Observations Deaths (%) Deaths (#) 5 min bubbles 55% 5 10 min bubbles 55% 5 15 min bubbles 55% 5 20 min bubbles 55% 5 25 min bubbles 55% 5 30 min bubbles 55% 5 Data table for Test: soda- 15mL Time Interval Observations Deaths (%) Deaths (#) 5 min bubbles 44% 4 10 min bubbles 44% 4 15 min bubbles 55% 5 20 min bubbles 66% 6 25 min bubbles 66% 6 30 min bubbles 77% 7 Data table for Test: soda 20mL: Time Interval Observations Death (%) Deaths (#) 5 min bubbles 88% 8 10 min bubbles 88% 8 15 min bubbles 88% 8 20 min bubbles 88% 8 25 min bubbles 88% 8 30 min bubbles 88% 8 V. Analysis The LD50 for hydrogen peroxide is approximately 0.24 molars. Hydrogen peroxide has 3% Hydrogen Peroxide (Stabilized), Purpose First Aid Antiseptic/Oral Debriding Agent. Its Inactive Ingredient is Purified Water. Hydrogen peroxide is a deteriorizing agent that is commonly used as a hair bleach when diluted. An Oral debriding agent describes what the hydrogen peroxide can do. This means that the hydrogen peroxide when diulted in water can help heal minor mouth and gum irritation. Since all living organisms have an enzyme called peroxidase, it helps decompose low concentrations hydrogen peroxide into water and oxygen. . There is no LD50 for nail polish remover. Nail Polish remover has the ingredients: Acetone, aqua, denatonium benzoate, tocopheryl acetate, aloe barbadensis leaf juice, parfum(means perfume in french), Cl 45410(dye), Cl 60730(dye). Denatonium benzoate is a chemical compound known to prevent and discourage people from drinking harmful products. Tocopheryl acetate, also known as vitamin E acetate provides beneficial antioxidant effects. Aloe barbadensis leaf juice, also know as Aloe Vera is a plant. When consumed, it can help relieve irritable bowel syndrome and heartburn. Acetone is an organic compound that is a colorless and flammable liquid. Concluding that acetone is the lethal ingredient and causes the death of the brine shrimp when ingested, it will cause liver problems, which causes the liver to have a hard time breaking them down. Large intake of acetone can lead to unconsciousness and death. There was no LD50 for Lemon; the ingredients in the lemon juice packets include water, lemon juice concentrate, sodium benzoate, sodium bisulfite, and lemon oil. Sodium Benozoate is a type of salt often used a preservative because it works well at killing bacteria, yeast, and fungi. Sodium bisulfite is a food addictive. When in contact with chlorine bleach, it will release harmful fumes.The brine shrimp died within 20 minutes because of the sodium benzoate in the lemon juice packet, which is a type of salt mixed together with vitamin C causes a carcinogen substance called benzene. Benzene is a carcinogen because when exposed into the air, it can cause leukemia. Eating or drinking substances with high levels of benzene can cause vomiting, dizziness, sleepiness, and or death. It may not be lethal enough to kill humans yet, but having a high amount of the lemon juice packets can potentially kill a human or any living organism. There is no LD50 for Hand Sanitizer but the graph decreases and increases because there was a slight change in the number of brine shrimp needed in each container. The ingredients contained in this chemical are: water, triethanolamine, glycerin, propylene glycol, aloe barbadensis gel(another form of aloe vera), carbomer, fragrance, blue 1(dye), yellow 5(dye), and 62% ethyl alcohol. Triethanolamine is a chemical compound that occasionally causes contact allergy. Glycerin is a simple alcohol compound that is used as a sweetener and sometimes a preservative in food and beverages. Propylene glycol is an organic compound used in many applications such as a food addictive called E number 1520, moisturizer in medicine, and a solvent for food coloring. Carbomer is a synthetic polymer that forms an adhesive eye gel. 62% ethyl alcohol is a flammable liquid used as solvents and fuel. The brine shrimp died because of the 62% ethyl alcohol in the hand sanitizer, when consumed can cause death. Alt hough used in wine and any alcoholic drinks, the drinks only contain small concentrations of alcohol, legal enough to drink. The LD50 for Super chill lemon lime soda is approximately 0.19 molars. The ingredients in the soda are carbonated water, high fructose corn syrup, citric acid, natural flavors, potassium citrate and potassium benzoate. High frutose corn syrup is comprised of many corn syrups that has undergone enzymatic(enzymes that catalyze) process that converts glucose into frutose for desired sweetness. There have been health concerns about raising the risks of diabetes and cardiovascular disease. Citric acid is a weak organic acid that is a natural preservative and used to add a sour taste to food and soft drinks. Contact with dry citric acid can result in skin or eye irritation. potassium citrate is a food addictive and used to regulate acidity. It is also a potential health hazard when administered incorrectly. Elevated blood levels of potassium citrate can result in heart attacks and death. Potassium benzoate is a food preservative that inhibits the growth of yeast, mold, and some bacteria. T he reason why the brine shrimp died because of potassium citrate in the soft drink. Too much potassium citrate can cause irregular heartbeat and a risk of having a heart attack. Although there are potassium citrate pills sold in stores, they are only recommended if the person had been having a case of fatigue or muscle weakness. The kidney is responsible for eliminating excess potassium in the body. The molarity formula: iM1V1=1M2V2 was used to find the LD50 and true concentration of each chemical after all the substance has been added to container and totaled. The LD50 for Hydrogen Peroxide is 0.24 molars. The LD50 for Super Chill lemon lime soda is 0.19 molars. There are no LD50 for lemon, nail polish remover, and hand sanitizer because the deaths were higher than fifty percent. The standard deviation at 20 ml for Hydrogen Peroxide is approximately 0.833, for Nail Polish remover, lemon, hand sanitizer, and soda is 0. The chemicals included in this experiment are normally used in everyday use in the household. Chemicals such as peroxide are used to clean injuries or cuts. Hand sanitizer is used to clean 99.9% of bacteria on hands. Nail polish remover is used for getting the nail polish off of the fingernails. Lemon juice packets are used in making the dressing for a salad. The LD50 for Nail Polish remover is 1.159 g/kg for humans when digested. Unfortunately, the LD50 for the r est of chemicals are unavailable because they have only been conducted on rats and mice. Although the results of the data were both consistent and gradual in terms of death percentages, a few of the brine shrimp died before 5 minutes of data was recorded. This indicated that the brine shrimp could not live in the high toxicity levels on some of the chemicals used in this experimentation even with the addition of water. VI. Conclusion This lab is significant because the participants are able to discover the true dangers of certain household products such as hydrogen peroxide, soda, hand sanitizer, lemon juice, and nail polish remover. With everyday household chemicals, a personà ¢Ã¢â€š ¬Ã¢â€ž ¢s health can be affected, thus finding the LD50 will tell us how toxic a certain item is. The use of the LD50 is to study the amount of a chemical that will kill 50% of the tested animal, which will show us how dangerous a product can truly be. Some insights include the participants testing the dangers of à ¢Ã¢â€š ¬Ã…“harmlessà ¢Ã¢â€š ¬Ã‚  products. The lab offered similarities and an opportunity for a hands on experience of the procedures a toxicologist, like finding the cause and effects of poison. By using mathematical formulas like the molarity formula and the standard deviation formula, accurate and reliable data was collected to find the true concentration of the LD50 chemicals. For example, the data and calculat ions from these formulas show that one of the chemicals, Hydrogen Peroxide is the LD50 with a molarity of 0.24 molars. The data tables show that chemicals like the lemon juice, nail polish remover, and hand sanitizer are not the LD50. This is most likely due to the fact that these products contain amounts of citric acid and alcohol which results in death rates that are over 50%. In the trials and tests, many occurrences of errors and mistakes which could have affected the outcome of the results. In one of the hand sanitizer tests, 18mL was added into the mixture of substance instead of 20mL. Instead of counting the number of death at a certain time, some of the intervals were missed by a minute or two. This lab was not as accurate as expected because of the difficulties experienced during the beginning of the lab. For example, lotion was one of the chemicals to be tested on the brine shrimp prior to the lab. However, because the lotion was dense, it was difficult to mix with the wat er. Also, the color made it nearly impossible to see and count the brine shrimp. These errors could be easily avoided in the future by double checking the amount of a substance being added, keeping track of time, and using transparent products. For a clearer understanding several alterations of a procedure outline, being careful with the amount of measurements and constant data collection could be applied in the future.

Loyset Compère Motets (Orlando Consort) :: Composer Music Musical Musician Essays

Loyset Compà ¨re Motets (Orlando Consort) Loyset Compere, an accomplished yet not very well-known composer of the 15th century, has been neglected as a figure in musical history. Historians through the ages have somehow left him out of most of their writings. Therefore, as modern researchers and discoverers, we have very little resources from which to gather information about Compere. In fact, even his date and place of birth are argued upon by historians. Thus, our study is limited to what we see on the pages of his music and what we glean from the music we hear (MCD 1490, Carapetyan). It is believed that Compere wrote some motets for the French Royal court during his years there. Among these motets was the canon Asperges me Domine, a beautiful four-part canon in 4ths. It was written sometime between 1500-1505, although the exact date is not known for sure. This was towards the end of Compere's life when his experience as a composer was at its peak (Carapetyan and Finscher 255). The canon was a popular musical form of this period; however, a canon in 4ths was not. There are many aspects of this piece that make listening to it fascinating. The following pages will explore the intrigues of Aperges me Domine including its structure and its ties between music and text. Asperges me Domine is broken up into three sections, each section starting with a solo chant from the superius voice. After the chant, each section then continues with a canon starting in one of the four voice parts. The first section, which we will call section I, starts with the opening chant and ends with a strong cadence on measure 18. It uses six overlapping phrases to express the first sentence of text. The first canon starts with the bassus voice, but the starting voice changes throughout the piece. However, each canon, throughout, is sung at the fourth. There are four strong cadences, m. 2, m. 5, m.10, and m. 18, each marking the end of a thought in the text. There are also many other places that exhibit a kind of pseudo-cadence where the modern ear expects to hear a resolution, and the resolution is reached; however, movement among the middle parts nullifies the effect of the cadence. For example, in m. 12, the superius and the bassus parts seem to reach a cadence point, but the tenor and alto parts continue to move catching the listeners attention away from the cadence point.