Women and institutions Essay Example | Topics and Well Written Essays - 500 words

Women and institutions - Essay Example Most of the societies practice division of labor by sex and age. Traditional western models depict men as economic providers, since their role was dynamic while women were domestic consumers and their role was static (Bosen, 319, 1984). Anthropologist and other social scientist have discovered that men are only partial economic providers. The contribution of men towards women and children vary in different cultures and depends in variations of women work. Women make significant economic decisions not only for children but also for men and the society (Wardlow, 153). Therefore, the important issue in analyzing economic system of any society is by considering the division of labor, and ways the fruits and labor are shared. The early model of hunting society presented man as the chief provider and decision maker in the society. The early model of foragers as the blue print of sexual division of labor has been widely criticized (Merlan, 262, 1991). It was assumed that foragers depended on meat as their only food and men did all the hunting as women stayed in camps with children waiting for men to bring them food. Anthropologist challenged this model when they started analyzing the contribution of women in foragers’ society. After extensive research, there are four changes in the model. Meat was not the staple food in forages society compared to the total food intake (Stivens, 331, 1970). When meat was less important in the meal than plant food, men still went out to hunt while women provided food for their groups through their contributions. Even in the male hunting and women, gathering model contributes sexual separation in food contribution especially between animal and vegetable food. Division of labor between sexes is flexible and changing in individuals and cooperative efforts (Stivens, 330, 1970). There are some difficulties in separating horticultural and agricultural societies. The major difference is the

Paper 2 Essay Example | Topics and Well Written Essays - 750 words - 12

Paper 2 - Essay Example Therefore Ii is apparent that the difference between compatibilism and hard determinism is that in hard determinism, the unexpected chains are made up wholly of mechanistic cause, blind, non-rational and effect but in compatibilism there is a rational element to the unexpected chain which includes a person’s own motives, dispositions, goals and desires. Harry Frankfurt the author to the book â€Å"freedom of will and concept of a person† tries to show how we can still be free even though we do not have the ability to choose or do otherwise (Lemos 13-5). As a philosopher he thinks that a person is not made up by just a specific species with a genetic code but rather by a complex system of desires and wills. Men for instance, are capable of wanting to be different in their desires and purposes from they are, by wanting and choosing from this or that. He brought up the concept by giving out examples that came out philosophically. According to him, there are two types of motives and desires. The ‘first order’ desires and the ‘second order’ desires. The first order desires are the ones that both persons and non-persons may use. An example would be a Cat wanting to eat food from a dish. This desire for the food is not challenged by the cat so the decision is proceeded on instantly. If there was an applica tion of the second order desire, the cat might have been reading an article and observed other skinner cats getting all the handsome cats to mate with her forcing this cat to question its eating habits. The questioning of a desire is what is referred to as the second order desire which is classified as ‘self-selection’. According to Frankfurt, only man has this capability but it has been discovered that some animals have this capability as well. From his own theory concept, he says that being free is a matter of doing what one is desired to do which is not an adequate condition of having

Dracula Essay Example for Free

Dracula Essay As Seward was called into the room, Renfield was found extremely injured, lying in a pool of blood that glistened under the light. His face was bashed and bruised, he had suffered severe damage to his head and it was evident that his back was broken as well. Renfield was kept in a straitjacket and his injuries left everyone wondering they could have been self-inflicted. As the story progresses, Seward sends the attendant to bring Dr. Van Helsing, who, after examination, later performs an emergency operation to the skull that would allow Renfield to regain consioucness and recount what had happen. As Renfield weakily began to recount the events that took place earlier that night. His story starts at the night Seward refuses to let him leave the asylum. Renfield admits to being visited by Dracula, who had appeared in a mist outside the asylum. After much attempt to resist the Count, Renfield was associated with Dracula for a period of time after he was promised several lives. Upon the presence of Mina Harker, Renfield notices that she appears extremely pale and seems to have lost alot of blood. This allows him to conclude and warn Seward and Van Helsing that Dracula had been visiting Mina. Prior to the moment Renfield was found on the floor, he explains that he encountered and tried to resist giving into Dracula, only to have been beaten up and thrown violently to the ground, crushing his head. The tale told by Renfield serves as new discovery that allows the characters of the book to carry out new ideas in order to bring down Dracula. His story seems to be the birth of a new discovery that represents the grande idea of resisting and going against Count Dracula. During his story, he appears to have been infuriated once he realized Mina was being violated by Dracula. This could represent how inaccepted actions that deteriorated purity were during the Victorian Era. Overall, his story serves as the final fuel that sets not only an ultimate goal but a time constraint as well, now knowing that Mina Harkers life was at risk. What can Mina see and hear when Van Helsing hypnotizes her? What does this indicate? Do you think Dracula can detect Minas interferance? Includes the October 11th entry of Dr. Sewards diary; the October 15th, October 16th, October 17th, and October 24th entries of Jonathan Harkers journal; telegram from Rufus Smith of Lloyds in London to Lord Godalming, dated October 24th; the October 25th, 26th, and 27th entries of Dr. Sewards diary; telegram from Rufus Smith to Lord Godalming, dated October 28th; the October 28th entry of Dr. Sewards diary. Mina makes the five men promise that if she becomes a vampire, they will kill her rather than allow her to be damned. She also asks her husband to read the burial service for her now, in case it should come to the worst. The heroes secure passage on the Orient Express from Paris to Varna, arriving there early to await the Count. Hypnotism of Mina brings the same news constantly: the sound of waves, masts, the movement of a ship at sea. Finally, they receive news that the ship has boarded at Galatz instead of Varna. The group takes the setback grimly, but they board the next available train to Galatz? knowing that they now may have to face Dracula on land. Van Helsing believes that the Counts unholy connection with Mina may have allowed him to discover their plans. He is optimistic, however, that the Count will not expect them to track him into his own country. A change comes over Mina, and Van Helsing believes that Dracula has released some of his hold over her spirit. The clue is in Draculas past, which Mina and Van Helsing analyze together: back when he was a mortal warrior invading Turkey, when the invasion failed he fled home and left his army to be cut to pieces. In the same way, he now thinks only of escape and has cut himself off from Mina? not realizing that because she has tasted his blood, Van Helsing can still hypnotize her and learn of Draculas whereabouts. Analysis Chapter 25 Although the Count is able to elude them at Varna, he makes a critical error when he cuts himself off from Mina (note, however, that Mina is still not free from the threat of becoming a vampire). He assumes that he is safe in his castle, and he does not understand that Van Helsings hypnotism, combined with Minas connection to the vampire, will give Draculas enemies a critical edge over him. Van Helsing and Mina both use the terms of physiognomy in this chapter, referring again and again to the Counts child brain. He is a criminal type (Mina even refers to two renowned physiognomists to back up her classification of the Count), and thus he has predictable limitations. He is selfish (he thinks of escape at all costs), and he uses the same strategy whether he is a mortal invading/escaping Turkey or an undead invading/escaping England. Here is another example of the heroes use of science as a weapon against the Count. It must be remembered that many intelligent people took physiognomy very seriously during Stokers time, and that for Stoker physiognomy was a viable tool for understanding and classifying human nature. Its racist/classist biases and unscientific methods are much easier to see in hindsight.

Extracting and Analysing Plasmid DNA From E.coli

Extracting and Analysing Plasmid DNA From E.coli Introduction Deoxyribonucleic acid (DNA) is a molecule present in all living things, and they carry genetic information which determines every characteristic a person can have. DNA contains 4 chemical units: Adenine, Guanine, Thymine and Cytosine. These 4 letters are organized to make genes which contain information to make proteins. As scientists have discovered, it is the genome (DNA sequence in a particular arrangement of the 4 letters) that makes every human unique. During the first stages of cell division, the human DNA is organized into 46 tightly coiled structures called chromosomes. As a cell divide, the chromosomes are copied over to the new cells, ensuring they receive a full copy of the genetic blueprint. Objective Isolate DNA of cheek cells Extract chromosomal DNA from strawberry Extract plasmid DNA from E.coli. General Method Collect cells Split cells open and release contents Destroy enzymes which break apart DNA Separate DNA from other cell components Precipitate DNA General Materials Solution I Solution II Solution III Tubes of various sizes according to use Proteinase K (10mg/ml) Strawberry Filter funnel DNA extraction buffer Chlorofoam LB Liquid Medium 5M NaCl 70% Ethanol 95% Ethanol Centrifuge Hot water bath Lysis Buffer DNA of Cheek Cells Collect cheek cells by rinsing mouth with saline solution Saline solution prevents cells from splitting open too soon Spin solution in a centrifuge to collect cells at the bottom of the tube Empty out the liquid, leaving the cell pellet at the bottom Add Lysis Buffer (Contains soap, salts and ions, buffers) Soap: Destroy fatty membranes that enclose cells Destroy nuclei membranes in the cells Salts and ions: Bring up osmotic pressure (pressure applied to solution needed to prevent the inflow of water) outside the cell, which helps break apart membranes Buffer: To maintain pH Breaks open cells DNA released into solution Add Proteinase K Digest contaminating proteins Degrades nucleases which attack nucleic acids Put the solution in hot water bath Enables Proteinase K to work efficiently Kill enzymes in the cytoplasm which can break apart DNA Add 5M NaCl Change polarity of solution to differentiate DNA from fats, carbohydrates and proteins DNA dissolves in ionic solutions, the rest do not Centrifuge solution Separates DNA (dissolved in clear liquid) from fats, carbohydrates and proteins (solid pellet) Transfer clear liquid (containing DNA) to new tube Add cold 95% ethanol to new tube Precipitate dissolved DNA from ionic solution since DNA is not soluble in alcohol The colder it is, the less soluble DNA (Can precipitate more) Coldness slows down enzymatic reactions which can break DNA apart Centrifuge new tube Resulting white pellet is DNA of cheek cells DNA of Strawberry Mash strawberry Add DNA extraction buffer (contains shampoo/soap NaCl) and mash Shampoo/soap: Dissolves cell membrane which is made up of lipid bilayer NaCl: Removes proteins that are stuck onto DNA Prevent proteins from precipitating along with DNA in ethanol Filter and add cold ethanol Precipitate DNA Twirl glass rod at interface between ethanol layer and slurp layer Resulting sticky mass is the plant DNA Plasmid DNA of E. coli Add solution I (contains glucose, Tris, EDTA) to prepared pellet Glucose: Increase osmotic pressure outside cells Tris: Maintain constant pH EDTA (Ethylenediaminetetraacetic acid): Protects DNA from enzymes which will degrade DNA Add solution II (contains alkali substances detergent) Alkali: Breaks open the cells Break down DNA into single strands Detergent: Break membrane apart Add solution III (contains acidic substances) Neutralizes pH so DNA strands can get back together as double stranded Precipitates cellular debris E. coli plasmid DNA remains in solution Add chloroform Extract DNA Centrifuge mixture Separates plasmid DNA and debris chromosomal DNA Transfer some amount of liquid into new tube Add 95% ethanol Centrifuge new mixture Purify plasmid DNA Pour away liquid and add 70% alcohol Remove remaining salts Centrifuge mixture Pour away liquid and spin the tube Resulting pellet is plasmid DNA Discussion/Extensions Why is DNA extraction important/used for: Crime and historical identification Lineage/origin identification Diagnosis of diseases Mass produce gene/protein important for treating diseases, using further DNA technology Genetic engineering Other DNA extraction methods: Anion-exchange Uses chromatography technique Nucleic acids of DNA are composed of negatively-charged phosphates Positively-charged substrate used to bind to the negatively-charged phosphates Proteins and RNA are then removed with medium-salt buffers Silica Gel Advantage: Fast, reliable, economical Uses silica-gel membrane to adsorb nucleic acids of DNA Catalysts: Chaotropic salts Buffers used in lysis helps DNA to adsorb on silica-gel membrane, and washes away metabolites and proteins Salting Remove proteins and contaminants by using high concentrations of salt Precipitates removed using centrifuge DNA recovered with alcohol Organic extraction Mix dead cells with phenol, chloroform and alcohol DNA extracted using alcohol precipitate Cesium chloride (CsCl) Mix suspended DNA with CsCl and ethidium bromide Solution centrifuged DNA extracted with isopropanol Limitations This general method of DNA isolation consists of many limitations: Inability to remove inhibitors of polymerase chain reaction Too many steps may be too time-consuming Multiple tube transfers may increase risk of contaminations by à ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒâ€¹Ã…“outsideà ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¾Ã‚ ¢ DNA Conclusions This simple experiment provides an introduction to the procedures that are used in modern microbiological laboratories. Other cases can get much more complex, and will involve more sophisticated methods and equipment. The extraction of DNA is the first step of many other fascinating processes, which includes the manufacturing of medicines as well as genetic engineering which alters the genes of organisms.

Comparison Of Trade Rivalries :: essays research papers

The German-Great Britain trade rivalry like the U.S.-Japan trade rivalry involved a rising power cutting into the trade of an already dominant trading power. There were several causes of the German-Great Britain trade rivalry according to Hoffman. The first was German's industry's zeal in procuring new contracts and expanding markets. They did this by fulfilling contracts even if they were very small and constantly trying to stay up with market demand. Second, Germans had a knowledge of languages that the English firms lacked. Third, German industry was aided by their government. In contrast Great Britain did not even supply consular assistance in helping develop markets in British colonies. Fourth, British trade was hurt by the conservatism of British manufacturers who were unwilling to develop new markets or hold onto those it already possessed. These four factors are just some of the factors that helped German industry grow and rival that of Great Britain. These four factors are all very similar to the Japan-U.S. trade rivalry. Japan like Germany was able to catch up to the U.S. because the U.S. was large and arrogant and refused to believe it could face competition from Japan. Like Britain, U.S. industry believed that they could hold onto markets and would not face competition. British and U.S. industry were startled by the fast rate of growth and industrialization that allowed Germany and Japan to transform themselves quickly into trading rivals. This fast rate of growth also caused friction between both sets of countries. Relations between Germany and Great Britain were damaged as they bickered over markets in particular colonies in Africa . This is similar to the friction between the U.S. and Japan unfair trading practices and closed markets. Both the U.S. and Great Britain in response to losing markets toyed with the idea of economic nationalism and tariffs. As Britain lost markets to Germany many in Britain felt that Britain should adopt tariffs on goods while others known as the free traders believed that a free trade would benefit Britain by creating markets. This split between Tariff Reformers and Free Traders is similar to the split in the U.S. between those in favor of free trade and those opposed to it. Germany's grab for new markets in the 1890's through commercial treaties such as the 1891 treaty with Austria-Hungry is similar to both the United States and Japan's free trade zones with neighboring

Jet Propulsion :: essays papers

Jet Propulsion Introduction: The following report, submitted to Roy Aircraft Engines Incorporated for an efficiency study, is an analysis of a turbojet engine completed by thermodynamically studying each main component that constitutes a turbojet engine. RAE Incorporated requested software that would calculate the theoretical maximum output velocity, using input data imputed by the user of the program. The calculations are made assuming idealized conditions. In the analysis, the turbojet was broken down into its fundamental parts, which consist of an inlet, compressor, burner, turbine, and nozzle. Description of Turbojet Components First, the inlet / diffuser, of a turbojet brings free stream air to the engine and does no thermodynamic work on the flow. It is assumed that the flow through the diffuser is isentropic. Second, the compressor does work onto the gas passing through to raise the pressure. Again, this process is assumed to be isentropic. Third, the compressed air is combined with fuel and is ignited within the combustor. The process within the combustor is assumed to be isentropic. The resulting high temperature fluid is used to turn the fourth component of the turbojet, the turbine. Next, the turbine is used to extract energy from the heated flow coming from the burner. This is done by this flow of gas passing through blades on a free spinning shaft. The turbine generates just enough energy to drive the compressor. When the flow passes through the turbine, the pressure and temperature are decreased. The next step is optional within the program. Here an afterburner is used to reheat the exiting gas from the turbine. This is done by injecting additional fuel into the gas exiting from the turbine. Igniting this mixture produces a higher temperature at the nozzle, as a result the final velocity of the jet engine is increased. Finally, the flow comes through the nozzle where no thermodynamic work is performed on the flow by the nozzle. The temperature remains constant through the nozzle while the pressure and velocity of the flow will change as dictated by the design of the nozzle. The nozzle is used to produce thrust and used to conduct the exhaust gases back to the free air. For the analysis of the turbojet, several assumptions were made and are as follows: 1. Air behaves as a compressible, ideal gas. 2. Flow through the diffuser, nozzle, compressor and combustor is Jet Propulsion :: essays papers Jet Propulsion Introduction: The following report, submitted to Roy Aircraft Engines Incorporated for an efficiency study, is an analysis of a turbojet engine completed by thermodynamically studying each main component that constitutes a turbojet engine. RAE Incorporated requested software that would calculate the theoretical maximum output velocity, using input data imputed by the user of the program. The calculations are made assuming idealized conditions. In the analysis, the turbojet was broken down into its fundamental parts, which consist of an inlet, compressor, burner, turbine, and nozzle. Description of Turbojet Components First, the inlet / diffuser, of a turbojet brings free stream air to the engine and does no thermodynamic work on the flow. It is assumed that the flow through the diffuser is isentropic. Second, the compressor does work onto the gas passing through to raise the pressure. Again, this process is assumed to be isentropic. Third, the compressed air is combined with fuel and is ignited within the combustor. The process within the combustor is assumed to be isentropic. The resulting high temperature fluid is used to turn the fourth component of the turbojet, the turbine. Next, the turbine is used to extract energy from the heated flow coming from the burner. This is done by this flow of gas passing through blades on a free spinning shaft. The turbine generates just enough energy to drive the compressor. When the flow passes through the turbine, the pressure and temperature are decreased. The next step is optional within the program. Here an afterburner is used to reheat the exiting gas from the turbine. This is done by injecting additional fuel into the gas exiting from the turbine. Igniting this mixture produces a higher temperature at the nozzle, as a result the final velocity of the jet engine is increased. Finally, the flow comes through the nozzle where no thermodynamic work is performed on the flow by the nozzle. The temperature remains constant through the nozzle while the pressure and velocity of the flow will change as dictated by the design of the nozzle. The nozzle is used to produce thrust and used to conduct the exhaust gases back to the free air. For the analysis of the turbojet, several assumptions were made and are as follows: 1. Air behaves as a compressible, ideal gas. 2. Flow through the diffuser, nozzle, compressor and combustor is

Are Harry Potter Harmful for Children

Are Harry Potter Books Harmful for Children? As far as I'm concerned, the Harry Potter series are quite suitable for children to read. As we all know, this set of books is written about a boy who is a wizard, and he fights with the devil for the justice, during the process it also show us how to treat our real friends and our family.Some parents and censors consider this book harmful for children to read and try to ban it, because of the manipulation, lying, violence, witchcraft (which they think is against god) and rebellion in Harry Potter books are unfit for children to read, for they will imitate the same thing and learn something adults don't want them to acquire that early. But I have to say it is just a book, in today's world if a child wants to know these things, all he need is just to go online and google it, so if they want to protect their children, why don't they ban the Internet?If you think that because there is witchcraft and devils in the novels which supports satan a nd defies God, I have to say that you are definitely wrong. If you have ever read this set of books, you'll find out that it's just the background and a part of this novel. The witchcraft is just the background which the author set to entertain readers. , because this field is very attracting and can satisfy children's curiosity. And it also keeps children's minds open. This world is nothing like the real world, so they can imagine lots of things which can develop their imagination and creation. When J. K.Rolling wrote about this darkness part, she also mentioned the right part. And it is a tale of good triumphing over evil. I think we can't see this series from just one perspective. We can't deny it for the author writes about the darkness and the devil then forget that from all perspectives, what she real emphasize and want readers to learn is the braveness, the justice, the friendship, the love, and the family. It taught our children, even adults how to become an upright person. For example, when Harry Potter, Hermione and Ron play â€Å"chess†, for the friendship and the justice Ron sacrifice himself to save Harry.In this real world, many adults can't do the same thing when they meet with difficulties. If we banned this book, what about Snow White? It i also filled with wicked, blackness things. Instead, we taught our children the correct and proper way by telling Snow White when they are very little. Therefore, why can't we treat the Harry Potter series the same way or even kinder. It is also a tale for children to learn the world by means of using the metaphor, changing the scene to the magic world. The dark part is not the point, but the love, the moral part that hit the nail on the head.If parents really worried about the darkness part, he/she can read the book for children while explain these for children instead of banning it. Although the censors think that their efforts are benefiting children, in the long run it is destroying them. We are d estroying our children's imagination. We put them in the same frame we set up for them. We decide which kind of books they read, which friend of children they make friends with, which kind of games they play, etc. If all these matters had to be approved and set up by adults, each child would be a mindless, characterless character.There would be no unique qualities to distinguish one from another, all children being of the same mold. If our children grew up with out creativity or imagination and only knew what was approved, this world would become numbing, vapid and meaningless. The Harry Potter series is encouraging the growth of a child’s imagination, allowing our children to grow into fully functioning, creative adults. As for the religious part, they say the book encourages witchcraft. I think they are too mean, too extreme. There are lots of fairy tale and legend for children about witchcraft or magic.We can't ban and criticize all these things. It is the same with Harry Potter. Just because Harry Potter is so popular and attractive to children, so they afraid the witchcraft will take the place of god, and they try to ban it. They say it's harmful for children actually on behalf of their own interest, not really for the children's sake. In conclusion, the Harry Potter books are not harmful for children. On contrary, it will enhance children's moral standard and imagination. Therefore, we should really recommend our children to read it.