Di-n-butyl phthalate Essays

Di-n-butyl phthalate Essays Di-n-butyl phthalate Essay Di-n-butyl phthalate Essay Abstraction Di-n-butyl phthalate ( DBP ) is a omnipresent environmental pollutant, extensively used as a plasticiser in many merchandises including plastics, cosmetics and medical devices. Some surveies have showed that DBP has possible testicular toxicity, nevertheless, the mechanism of action of DBP on male reproduction is non clear. The present survey was designed to further look into the possible male generative toxicity of DBP more wholly. Oxidative emphasis was besides assessed in rat testicles as an implicit in mechanism. Forty SD grownup rats were indiscriminately allotted to four groups, and DBP was administered to each group by unwritten forced feeding at doses of 0 ( control ) , 100, 250 and 500mg/kg/day for 2 back-to-back hebdomads. The consequences indicated that the generative toxicity of DBP is dose-dependent. Body weight and testicular weight was significantly decreased in rats of DBP exposure at dosage of 500mg/kg/day. Sperm count and motility were significantly decreased at dos es of 250 and 500mg/kg/day group. The same two doses significantly inhibited the activities of superoxide dismutase ( SOD ) , glutathione peroxidase ( GSH-Px ) , and glutathione ( GSH ) while the degree of malondialdehyde ( MDA ) was significantly increased in testicles of rats. Microscopy with hematoxylin and eosin ( HE ) staining showed that seminiferous tubules wasting and seminiferous epithelial cells disintegrated and shed in rats of DBP exposure at doses of 500mg/kg/day. In decision, DBP alters the testicular construction and map, at least partially, by bring oning oxidative emphasis in testicles of grownup rats. Cardinal words: Di-n-butyl phthalate ; Reproductive toxicity ; Testis ; Oxidative emphasis 1 Introduction Recent epidemiological information showed that the human seeds quality has declined during the last 60 old ages, whereas the incidence of male venereal piece of land abnormalcies and sterility has increased [ 1-2 ] . Infertility affects 10-15 % of twosomes, male factors account for about half of all sterility instances. Although modern diagnostic methods detect more and more organic causes of sterility, unluckily, about 50 % of sterility instances are still unexplained for work forces [ 3 ] . The recent diminution in sperm quality observed in work forces has developed over a short period of clip, proposing that it could be the consequence of environmental factors [ 2 ] . Recently, there has been increased consciousness of the possible effects of environmental contaminations on male reproduction [ 4-5 ] . Di-n-butyl phthalate ( DBP ) is a omnipresent environmental pollutant, It is a phthalic acid ester used extensively as a plasticiser in many merchandises including flexible plastics, medical devices and some decorative preparations [ 6,7 ] . DBP have attracted particular attending from the scientific community and the general public due to their high production volume, in million of dozenss yearly [ 8 ] . Human exposure occurs chiefly through contaminated nutrient and H2O, particularly high-fat nutrients, which may be in contact with plastic, adhesives, or other packing stuffs that contain DBP, pharmaceutical preparations besides result in important human exposure, because assorted plasticisers are used to surface medical specialties such as antibiotics, antihistamines and laxatives [ 9 ] . Although there are deficient informations for DBP effects on human reproduction, some surveies in gnawers have reported the influence of DBP on the male generative system [ 10-12 ] . To day of the month, nevertheless, the mechanisms of generative toxicology of DBP are still ill-defined and need to be farther studied. Oxidative emphasis consequences from an instability between the inordinate formation of reactive O species ( ROS ) and limited antioxidant defences. ROS, including vest O, H peroxide, superoxide anion and hydroxyl group, are of import go-betweens of cellular hurt, and play an of import function in oxidative harm. Environmental contaminations have been shown to bring on ROS coevals in both intra- and extracellular infinites of cells or persons taking to cell decease and tissue hurt [ 13,14 ] . Previous surveies from our research lab have besides shown that environmental factors alter pro-oxidant and antioxidant balance in testicle [ 15,16 ] . Therefore, the present survey was designed to further look into the male generative toxicity of DBP, oxidative emphasis was besides assessed in testicles as a possible implicit in mechanism. 2 Materials and methods 2.1 Animals and intervention 40 healthy grownup male Sprague-Dawley rats weighing 200-210 g were obtained from Experimental Animal Center of Xian Jiaotong University. Animals were housed in solid-bottomed polycarbonate coops in SPF carnal research lab with a temperature 21-25? and a comparative humidness of 40-60 % . Rats were acclimatized at a 12 H light / 12 H dark rhythm and fed a standard diet and tap H2O ad libitum for a hebdomad before the experiments. Experiments were performed in conformity with the Animal Experimentation Committee Regulation. The rats were divided at random into four groups, each consisting 10 persons. Rats in DBP-exposed groups were given DBP ( Sigma Chemical Co. , St. Louis, MO ) at a dosage of 100, 250, 500mg/kg/day ( 1ml/100g organic structure weight ) severally by unwritten forced feeding for 2 back-to-back hebdomads. Rats in the control group were orally administered maize oil in the same volume for 2 back-to-back hebdomads. 2.2 In-life observations All rats were observed at least twice per twenty-four hours. Changes in the tegument and pelt, mucose membranes, respiration and carnal behaviour were monitored. Body weight was later recorded one time per hebdomad before autopsy. 2.3 Testicular histopathology At the terminal of the exposure, the rats were sacrificed by an overdose of pentobarbital Na ( 50 mg/kg, i.p, Sigma, USA ) , the testicles were instantly removed and weighed. The left testicles of each rat were used for histopathological survey and the right for biochemical check. Left testes was fixed in fresh Bouin s solution for 24 hours and so dehydrated and embedded in paraffin, eventually 4  µm subdivisions were cut and stained with hematoxylin A ; eosin ( HE ) . The tissue subdivisions were observed under a light microscope for the testicles histopathology harmonizing to Bustos-Obregon et Al [ 17 ] . 2.4 Epididymal sperm analysis Epididymiss were dissected out and instantly minced with all right scissors in 5 mL physiological saline at 37? , and so incubated at 37? for 30 min to let sperm cell to go forth the epididymal tubules. One bead of sperm suspension was placed on a slide for light microscope observation of sperm motility at a magnification of -400, a sum of 200 sperm per sample were evaluated. Entire sperm figure was estimated utilizing Neubaeur haemocytometer harmonizing to old methods [ 15 ] . 2.5 Testicular biochemical checks ( Assay of oxidative position and enzymatic antioxidant ) ) Right testicles of each rat was instantly de-capsulated, cleaned and washed in precooling physiological saline several times and homogenized in 0.1mol/L pH 7.4 precooling phosphate buffered saline ( PBS ) , the homogenate was centrifuged at 3000 -g for 15 min and the supernatant was used for biochemical checks. The activities of glutathione peroxidase ( GSH-Px ) , superoxide dismutase ( SOD ) and the content of glutathione ( GSH ) and malondialdehyde ( MDA ) in testicles were detected utilizing commercial Assay Kit ( Jiancheng biotech Int, Nanjing ) . 2.6 Statistical analysis All statistical analyses were carried out utilizing SPSS statistical package version 13.0 ( SPSS, Chicago, USA ) . First, all informations are tested for normal distribution ( Shapiro-Wilks ) and homogeneousness of discrepancies ( Bartlett trial ) , specifying whether the consequences should be analyzed parametrically or non-parametrically. Finally, statistical analysis was performed utilizing one-way ANOVA, all Data were expressed as mean ±SD. P lt ; 0.05 was considered as important. 3 Consequences 3.1 General position of Rats All rats treated with and without DBP survived the 14-day observation period, general position ( skin and fur colour, reactivity ) in rats of 100 and 250mg/kg/day DBP exposure groups showed no obvious difference compared with those in the control group. However, rats in 500mg/kg/day DBP exposure group showed rarefaction of hair and torpor of reaction. 3.2 The organic structure and testicles weight Compared with the control group, organic structure weight and testicles weight were significantly decreased in rats of 500mg/kg/day DBP exposure group ( P lt ; 0.05 ) ( Fig. 1, 2 ) . 3.3 Testicular histopathology Compared with controls ( Fig. 3A ) , the morphology of testicular seminiferous tubules of rats the 100 and 250mg/kg/day groups ( Fig. 3B, 3C ) showed no obvious alterations. However, there were important histopathological alterations in rats of 500mg/kg/day DBP exposure group. The chief pathological alterations included seminiferous tubules atrophy, the seminiferous epithelial cells disintegrated and shed, spermatogenic cells decreased ( Fig.3D ) , and the lm were oligozoospermic ( Fig. 3D ) . 3.4 Epididymal sperm Compared with the controls, the sperm count and the per centum of motile sperm were significantly decreased in rats of 250 and 500mg/kg/day DBP exposure groups ( P lt ; 0.05 ) ( Fig. 4, 5 ) . 3.5 Testicular biochemical analysis The activities of SOD, GSH-Px and GSH in testicular tissue of rats of 250 and 500mg/kg/day DBP exposure groups were significantly lower than those of the controls ( P lt ; 0.05 ) ( Fig. 6-8 ) . Furthermore, MDA degrees in the testicular tissue were found to be significantly higher in the 250 and 500mg/kg/day DBP exposure groups compared with the control group ( Fig. 9 ) . 4 Discussion DBP is a omnipresent environmental contamination, human are invariably exposed to DBP through nutrient, H2O or contact with a assortment merchandises [ 8 ] . Although preventative steps aimed at cut downing DBP contamination have been implemented, exposure to DBP remains one of the most outstanding environmental wellness jobs [ 8,18 ] . In present survey, the dose-dependent male generative toxicity induced by DBP was shown to be associated with decrease in testicular weights, regressive testicular histological morphology every bit good as with lessening in sperm count and sperm motility. Our survey showed that the testicular weight was significantly decreased in rats of 500mg/kg/day DBP exposure group, The weight of testicles is mostly dependent on the mass of the differentiated spermatogenic cells, the ascertained decrease in the weight of testicles are due to the reduced figure of germ cells and extended spermatids in the testicles [ 14 ] , which is consistent with the consequences of testicular histological alterations. DBP caused regressive histological alterations in the seminiferous tubules which supports the consequences of other writers [ 10,19 ] . Seminiferous tubules wasting and spermatogenic cells decreased were structural index of spermatogenesis failure [ 20 ] . Seminiferous epithelial cells sheding were normally due to the harm of sertoli cells and break of intercellular span [ 21 ] . Our survey showed that the sperm count and the per centum of motile sperm were significantly decreased in rats of 250 and 500mg/kg/day DBP exposure groups, nevertheless the testicular weight and morphology showed no obvious alterations in 250mg/kg/day DBP exposed group. These consequences showed that sperm count and motility is more sensitive parametric quantities in rating of hazards from toxic effects on male generative system, which supports the consequences of other writers [ 14, 22 ] Pro-oxidant and antioxidant balance is critical for normal biological operation of the cells and tissues [ 14 ] , the antioxidant system comprises enzymatic antioxidants such as SOD, GSH-Px and non-enzymatic antioxidants such as GSH. SOD and GSH-Px are major enzymes that scavenge harmful ROS in male generative variety meats. GSH repairs oxidized and damaged molecules and besides play a function in modulating a assortment of cellular maps. Oxidative emphasis occurs when the oxidative homeostasis is damaged [ 23 ] . Excessive ROS are generated and caused lipid peroxidation, MDA is one of most of import merchandises of lipid peroxidation which interfere protein biogenesis by organizing adducts with DNA, RNA and protein [ 24 ] . Our surveies showed that the obvious lessening of testicular antioxidant system while outstanding increasing of testicular lipid peroxidation merchandise MDA in testicles of 250 and 500mg/kg/day DBP exposure rats. These parametric quantities alterations were consistent with the alterations of sperm count and motility. It is known that human testicles and sperm cells are highly sensitive to ROS-induced harm [ 25 ] . The elevated degrees of ROS consequence in oxidization of cellular constituents with unsaturated fatty acids, the most vulnerable molecules [ 14 ] . Spermatozoa have been considered to be extremely susceptible to the harm induced by ROS because of their high content of polyunsaturated fatty acids. In add-on, Excessive ROS increase germ cells programmed cell death and suppress the activity of sperm cell [ 23 ] . Similar phenomena frequently are observed after exposure to other chemicals that cause testicular harm [ 14,15,24 ] . It suggests that oxidative emphasis is one of of import mechanisms of testicular harm. In decision, our surveies demonstrate a dose-dependant male generative toxicity of DBP, exposure of the ranked doses of DBP elicit lessening in testicular weight and sperm quality. In add-on, exposure of the ranked doses of DBP generates ROS by diminishing the activities of antioxidant enzymes and increasing lipid peroxidation thereby doing oxidative emphasis in testicles of rats. This concludes that DBP induces testicular toxicity, as least partially, by initiation of oxidative emphasis in testicle.

Double Replacement Reaction Definition

Double Replacement Reaction Definition A double replacement reaction is a chemical reaction where two reactant ionic compounds exchange ions to form two new product compounds with the same ions. Key Takeaways: Double Replacement Reaction A double replacement reaction is a type of chemical reaction that occurs when two reactants exchange cations or anions to yield two new products.Double replacement reactions are also called double replacement reactions, double displacement reactions, or metathesis reactions.Neutralization, precipitation, and gas formation are types of double replacement reactions. Double replacement reactions take the form: AB- CD- → AD- CB- In this type of reaction, the positive-charged cations and the negative-charged anions of the reactants both trade places (double displacement), to form two new products. Also Known As:  Other names for a double displacement reaction are a metathesis reaction or a double replacement reaction. Examples of Double Replacement Reactions The reaction: AgNO3 NaCl → AgCl NaNO3 is a double replacement reaction. The silver traded its nitrite ion for the sodiums chloride ion. Another example is the reaction between sodium sulfide and hydrochloric acid to form sodium chloride and hydrogen sulfide: Na2S HCl → NaCl H2S Types of Double Displacement Reactions There are three classes of metathesis reactions: neutralization, precipitation, and gas formation reactions. Neutralization Reaction - A neutralization reaction is an acid-base reaction which yields a solution with a neutral pH. Precipitation Reaction - Two compounds react to for a solid product called a precipitate. The precipitate is either slightly soluble or else insoluble in water.   Gas Formation - A gas formation reaction is one which yields a gas as a product. The example given earlier, in which hydrogen sulfide was produced, was a gas formation reaction.

Implant Essay Example | Topics and Well Written Essays - 2000 words

Implant - Essay Example A 10 year prospective clinical research study by Karoussis et al (2004) evaluated the periodontal and peri-implant conditions in a cohort of 89 edentulous patients (mean age 58.9 years) in order to assess the environmental, physiological and radiographic changes in the dental implants over a long period of time post-implantation. The rationale for this clinical research study involves the need to establish reliable data relevant to the use of dental implants in patients who have had tooth extractions. These types of data are difficult to obtain since they require long term assessments of patients who have received dental implants. These longitudinal single subject studies also require recruitment of large patient cohorts and need to address physiological and environmental factors that affect long-term success rates for dental implant procedures. The study participants were evaluated at one year and again at 10 years post implantation to evaluate the changes periodontal peri-implant c onditions in individual patients. This study also incorporated an evaluation of risk factors associated with sub-optimal patient outcome post-implantation. Patients recruited in this study had previously been treated for periodontal disease and also had received prosthetic structures such as fixed partial dentures and crowns. ITI dental implant system was used in all patients enrolled in this study. Within this cohort a total of 179 implants were assessed; the same number of control natural teeth were included as a basis of comparison. In addition, all remaining teeth were examined in these patients. Patient behavioral risk factors, particularly cigarette smoking, were also evaluated in this study. The data parameters assessed in this study included plaque index (PI) for teeth and modified plaque index (MPI) for implants, gingival index (GI) for

The Young and Elder Consumers of SONY in United Kingdom Essay

The Young and Elder Consumers of SONY in United Kingdom - Essay Example at there will be an â€Å"increased intergenerational heterogeneity in total spending† – i.e., the effect of pension reforms will tend to change the intergenerational distribution of income, shifting stronger expenditure to the elderly in countries which provide more thorough coverage of retirees’ social benefits than other countries. (1) A Sony product has been designed for old people and the disabled is the BRAVIA LCD television series for the European market, that incorporates standard features such as an audio description function providing the consumer a narrative soundtrack for the visually challenged and impaired, and digital video teletext for those who have loss of hearing function. (2) Sony’s Reader digital device, another product made available in the US, Canada and Europe, stores hundred of books in one unit, but allows readers who have difficulty with their vision to adjust the size of the text on the screen. (3) All Sony TVs also come with adjustable headphone sets that may be used simultaneously with the speakers to be able to enjoy the television program with their non-hearing impaired family and friends. 2. The competition environment, (you can choose three comany) to the older people, you find some resources on what new products these companies developed targeting at older people in recent years.(150-200 words) Teh, J 2009 â€Å"Make-in-Singapore Phone, iNO Mobile, for Elderly to Debut in PC Show,† TechieLobang 11 June 2009. Accessed 18 June 2011 from http://techielobang.com/blog/2009/06/11/make-in-singapore-phone-ino-mobile-for-elderly-to-debut-in-pc-show/ Foresight Technologies of Singapore, making iNO Mobile, for elderly and young children. The phone is described as simple, with the basic features and large number key pad, which will serve the uses of the elderly and young who are not tech savvy but need to get only the fundamental functions. Called the CPO9, the mobile has a candybar design and will sell for a very reasonable

The two worlds in the poems Essay Example for Free

The two worlds in the poems Essay The poems I am comparing are presents from my aunts in Pakistan by Moniza Alvi, two scavengers in a truck, two beautiful people in a Mercedes by Lawerence Ferlinghetti and nothings changed by Tatamkhulu Afrika. All these three poems compare two different worlds. The poem by Moniza Alvi compares the Asian traditions and the western traditions. The poem by Tatamkhulu Afrika compares how white people and black people where treated in Africa after a war. The poem by Lawerence Ferlinghetti compares the world between rich, wealthy people and the poor people in San Francisco. The poem Nothings changed is written by a poet who returns to his homeland after a part of the country was declared as whites only. The country that the poet calls his homeland is now destroyed and the poet expresses the anger he felt when the place was first destroyed. He now sees new restaurants which look expensive and stylish with a guard at the gatepost. And further down the road he sees a working mens cafi where people eat without plates from a plastic tabletop. This situation makes him really angry because the white people were seated inside the exclusive restaurant with its ice white glasses and single rose on the table while the black people in Africa ate on plastic table top and wiped their hands on their jeans. The poem is set out in six stanzas and each of the stanzas consists of eight lines which are fairly short. Stanza one consists of a single sentence and it describes what the sees when he first walks into the country that was his homeland cans trodden on crunch in tall purple flowering, amiable weeds. This shows how the poet feels when he sees his homeland. The second stanza has a repetition of and and it also shows that the poet feels the racial separation in this country in every bone in his body, eg my feet know, and my hands, and the skin about my bones. The remaining paragraphs explain the poets feelings towards the white people. The title of the poem refers to the wealth of the white people and the poverty of the black people. The poet had obviously hoped that things would change by the time he came back but to his dismay nothing has changed and it seems like that things have gotten worse.

Role of Women in Conrads Heart of Darkness :: Joseph Conrad, Heart of Darkness

Women do not play an important part in Heart of Darkness. This is not too surprising as the text was first published for a magazine in 1898. Throughout Marlow's voyage he encounters few women and he does not consider any of them to be his equal. His reference to women places them in their own little world where they should remain. There are a number of reasons as to why Marlow may have this understanding of the female being. These reasons include, but are not limited to, the lack of females in his life, the fact that he is primarily surrounded by men, and the type of women he comes in contact with in his line of work. Â   First and foremost, we will note that Marlow is a seaman. He is a man who has dedicated his life to the ways of the water. As the narrator mentions when speaking of Marlow, "he was the only man of us who still 'followed the sea'" (Conrad, 9). He has been picking up and traveling the world by way of a boat for most of his adult life. The simple fact that he is able to do this without regret is a hint into Marlow's personal life. He cannot be a family man, because it would be too hard for him to be away from family members for such great lengths of time. He may have a mother or a sister somewhere, but it is obvious that, for Marlow, there is no strong bond with any female family member. Even his aunt who so willingly helps him find work is not spoken of lovingly. If Marlow were to have a wife, one would assume that, it would be hard, if not impossible, for him to maintain a faithful marital relationship to her while leading such a Nomadic lifestyle. This is presumably why he is not emotionally attached to a wife or serious girlfriend. Â   It is also safe to say that Marlow does not have any platonic girl associates, because of the statement made about them in their own world. He makes it quite clear that women and men are on two totally different levels. In the time that the story was written, it would have been crazy to think of a woman and a man having a mutual friendship that had no loving or sexual components. Role of Women in Conrad's Heart of Darkness :: Joseph Conrad, Heart of Darkness Women do not play an important part in Heart of Darkness. This is not too surprising as the text was first published for a magazine in 1898. Throughout Marlow's voyage he encounters few women and he does not consider any of them to be his equal. His reference to women places them in their own little world where they should remain. There are a number of reasons as to why Marlow may have this understanding of the female being. These reasons include, but are not limited to, the lack of females in his life, the fact that he is primarily surrounded by men, and the type of women he comes in contact with in his line of work. Â   First and foremost, we will note that Marlow is a seaman. He is a man who has dedicated his life to the ways of the water. As the narrator mentions when speaking of Marlow, "he was the only man of us who still 'followed the sea'" (Conrad, 9). He has been picking up and traveling the world by way of a boat for most of his adult life. The simple fact that he is able to do this without regret is a hint into Marlow's personal life. He cannot be a family man, because it would be too hard for him to be away from family members for such great lengths of time. He may have a mother or a sister somewhere, but it is obvious that, for Marlow, there is no strong bond with any female family member. Even his aunt who so willingly helps him find work is not spoken of lovingly. If Marlow were to have a wife, one would assume that, it would be hard, if not impossible, for him to maintain a faithful marital relationship to her while leading such a Nomadic lifestyle. This is presumably why he is not emotionally attached to a wife or serious girlfriend. Â   It is also safe to say that Marlow does not have any platonic girl associates, because of the statement made about them in their own world. He makes it quite clear that women and men are on two totally different levels. In the time that the story was written, it would have been crazy to think of a woman and a man having a mutual friendship that had no loving or sexual components.

How Is Curley Presented by Steinbeck in of Mice and Men

Curley is one of ‘Of Mice and Men’s’ major characters. Although he does not appear to hold a central role, he is very important in other respects. The first of these is the way in which he treats George and Lennie, and the ranch workers in general on the ranch. Curley is the boss’ son. Therefore he acts like he is the boss himself. He orders the others around, and, although it is true that he does hold some power on the ranch, he does not hold any respect from the workers.He is nasty towards them, treating as though they are them below him, and often trying to pick fights. Curley is disliked by pretty much everyone on the ranch, and with good reason. George immediately dislikes his hostility, and shows the same attitude in return. He himself says â€Å"I hate that kind of a guy† as soon as he has and warns Lennie to â€Å"have nothing to do with him†. Even Curley’s own wife dislikes him, sarcastically saying â€Å"swell guy, ainâ€℠¢t he† when told to talk to him by Candy. Furthermore, Candy, although not directly airing his dislike mentions the he is â€Å"handy.God damn handy. † The way in which Candy says this hints towards his dislike for Candy being on account of his aggressive nature and hostility, rather than simply being due to his nastiness. His desire to fight with people all the time shows two things. Firstly, it shows inferiority complex: Curley is short, and therefore is constantly trying to be better than â€Å"big guys†. Secondly, it shows his aggression. Curley holds a fighting stance when he first encounters George and Lennie: â€Å"his arms gradually bent at the elbows and his hands closed into fists.He stiffened and went into a slight crouch. † According to Candy, Curley is an amateur boxer and is always picking fights, especially with guys who are bigger than he is. Ultimately, Curley is trying to prove his masculinity. Another way in which Curley can be seen as t rying to prove himself is by marrying a physically attractive woman. His wife is never given a name, but by calling her â€Å"Curley's wife,† Steinbeck indicates she is his possession. Curley refuses to let her talk to anyone on the ranch, isolating her from everyone and setting the stage for trouble.This trouble happens in Section 3, where he accuses Slim of being with his wife and is completely wrong. He is ganged up on by the ranch workers, and picks on Lennie in order to vent his anger at being picked on. This turns out to be a mistake. Lennie quickly crushes his hand, and Curley has to be taken to the hospital. Luckily for George and Lennie, Slim comes to there aid, telling Curley â€Å"your hand got caught in a machine†. He makes a big show of keeping his hand soft to caress her, yet also visits the local whorehouse on Saturday night.While he may strut around the ranch because of his position as the boss' son, he obviously cannot satisfy his wife and is mean, or perhaps simply detached from her. Curley beats up any man who dares to talk to her, but ironically, he rarely talks to her himself, and they spend the majority of the book looking for each other. When Curley’s wife dies, Curley, rather than showing the reaction that would be expected of a man whose wife has just been killed. He does not appear to grieve at all in any way, barely looking at the body, or regarding the her death into his immediate future plans.Instead, his first thought is towards seeking revenge and hunting down Lennie. It is perhaps this moment in the novel which epitomises the way in which Curley is aggressive, nasty, and shows no concern for anyone else apart from himself. All of this seems to be negative however. Surely Steinbeck didn’t present Curley in a poor light? Well, there may some positive aspects to Curley, or perhaps those which are not entirely bad. Firstly, he does appear to show some care for his wife. He is constantly looking for her, a nd appears to try and protect her.Although she is more of a possession to him than a person, he is clearly proud of her, but perhaps for the wrong reasons. Also, Curley is a good worker. He is one of the best on the ranch, having grown up there, and this shows in his care for his work. Unlike most of the other characters, Curley doesn’t develop much over the course of the book, but he stands out as a character with whom Steinbeck does not sympathise. Whilst everyone else is struggling, Curley’s busy picking fights and trying to throw his weight around on his dad’s ranch. He seems to be outside of the economic struggle and even the personal struggle of the Depression.Curley’s the kind of person that is needed in contrast to the mild peacefulness of the other characters. Also, someone is needed to be the source of trouble among the men of the ranch who mostly want to get along. In conclusion, if Steinbeck wrote ‘Of Mice and Men' as being a microcosm o f American society, then Curley represents one clear type of person. This is all the men in the country at the time who are petty and embittered, who wish to appear better than all of the others. He acts as a sort of control variable, whose actions and reactions can almost always be predicted, because he is such a simple shallow person.

Mankind Harming Environment

I believed that mankind harms our environment. During the earliest times, the life-styles of our ancestors were very simple. The air they breathed was clean. The streams were clear and free of harmful organisms. They used natural fertilizers for the agricultural crops. The surroundings were free of household throwaways. Today, there has been a tremendous growth in science and technology. Such advances have brought about changes in terms of new products, improved equipment, and more effective methodologies. Unfortunately, this same technology which made life easier for us produced wastes which are now affecting the quality of our surrounding air, water, and land. Factories and motor vehicles send tones of pollutants into our air. Excessive air pollution poses a danger to our health. It can likewise cause stunted growth and even death to our plants. Out streams are polluted by discharges from industrial plants that use chemicals. Garbage and sink wastes are carelessly thrown in our surroundings. Synthetic fertilizers and insecticides pollute our land and farm products (Allaby, 2002). Are we all aware of the extent of the damages brought about by modernization? Have we contributed to such environmental pollution? What have we done to minimize such danger to our lives? How can we take care of our environment? We must undertake measures to conserve and preserve our resources and minimize utilization of energy before it’s too late. Our fight against pollution is an initial step toward conserving our environmental resources and energy. We must all join hands for this common goal. Reference: Allaby, Michael. (2002). Basics of Environmental Science. Routledge. London.

Once upon a time

Once upon a time there was peace between the people of England and the settlers of the American colonies. But as time went on and England began to take advantage of the colonies this great peace left and turned into a bloody revolution which would change the world. This revolution resulted the end of the great English power and the birth of a new country America. Before the actual fighting really started the relationship between the colonists and Great Britain was stretched out to the breaking point as the Americans Representation was very important to the American colonists. The Americans felt that they needed to be represented when issues were brought up that dealt with the welfare of the American colonists. England felt the colonists should do and act on how they felt. To England the Americans were a private gold mine. The colonists could only take so much before rebelling. The Boston Tea Party is just one example of the Americans being fet up with the suffocating grasp which the British held over them. Taxation without representation became a well known cry from the colonists that could The term sovereignty meant nothing to the Royal family which felt they had total control and overall power of the American colonies settled in the English name. But to the American colonists the term sovereignty meant they had the right to rule themselves as their own nation . Part of coming to the American colonies in the early days was the fact that you had certain freedoms that were not permitted in England. The people of America became used to these freedoms and were not about to change their ways when England needed the raw materials and the business. In England there was no such thing as a constitution. The word existed, but their was no piece of paper telling the people of England what rights they had and did not have. It was all knows in a sense by word of mouth. The Amer

Periodic Table With Common Ionic Charges

Periodic Table With Common Ionic Charges The most-requested printable periodic table has been one for element charges, to predict compounds and chemical reactions. Now, you can use periodic table trends to predict the most common element charges. Group I (alkali metals) carry a 1 charge, Group II (alkaline earths) carry a 2, Group VII (halogens) carry -1, and Group VIII (noble gases) carry a 0 charge. Metal ions may have other charges or oxidation states. For example, copper usually has a 1 or 2 valence, while iron typically has a 2 or 3 oxidation state. The rare earths often carry many different ionic charges. One of the reasons you dont normally see a table with charges is because the organization of the table offers a clue to common charges, plus elements can have just about any charge given enough energy and the right conditions. Even so, heres a table of element charges for readers seeking the most common ionic charges of element atoms. Just keep in mind elements may carry other charges. For example, hydrogen can carry -1 in addition to 1. The octet rule doesnt always apply to ionic charges. In some cases, the charge can exceed 8 or -8! Ive got a  huge collection of printable periodic tables, which include all 118 elements. If you dont find what you need, just let me know and Ill have it made for you!

Rhetorical analysis Essay Example | Topics and Well Written Essays - 750 words

Rhetorical analysis - Essay Example The writer has clearly set out to convince the audience that the death penalty is wrong and immoral and any justification it may have is overwhelmed precincts on which he demonstrates its thrives. These include racism and the possible incompetence of judge’s prosecutors and juries. Herbert also appeal to the readers logic and commonsense by citing examples of previous supporters of the penalty such as Adam Litpack, who have recently come to change their minds on the same. His description of the death penalty, which is undoubtedly subjective, is aimed evidently at getting the readers emotional support on board. This is especially with the strong and condemnatory terms †¦Ã¢â‚¬Å"The death penalty in the United States has never been anything but an abomination — a grotesque, uncivilized, overwhelmingly racist affront to the very idea of justice†. In addition, Judge Stephen who posits that deciding the life and death of individuals is not a task that should be lef t to a system that has been found to have flaws. The basis of the initial argument is that the police and prosecutor are liable to withhold and tamper with evidence of innocence in order to ensure they get the verdict. He strengthens his argument by asserting that there have cases where lawyers on whom the defendants lives depend have been drunk or on drugs and as result, innocents have died. Herein he develops his case for banning the practice by opening the reader to the possibility that despite the otherwise viability the penalty, it can result to innocent people dying as one cannot be 100% sure of one’s guilty by making it appear relative to the defenders competence with is also relative to their sobriety, and other circumstances. The writer also uses retrospective evidence to persuade the reader of the authenticity of his claims in a demonstrative of the effects of racism in the wheel of justice. Moreover, he cites cases in the past when prosecutors racism was openly pra cticed, he gives the example of a judge who says he was once told if he ever put â€Å"a nigger in the jury, he would be fired†. The writer then tries to prove that this has not changed much by saying that the prosecutors have however only improved their language as such implying the same sentiments exists even today. Herbert gives credence to his argument by referring to an interview with Patricia Lemay a white juror who once served in a hearing resulting I an execution, during the jury deliberations which are supposed to be archetypical of objectivity and fairness, the jurors displayed nauseating levels of xenophobia and discrimination. This was brought out by the idea among some groups that white lives were more valuable than black ones. Citing credible sources in the form of retired justices Thurgood and Blackmun who he contrast the original intention with the result effectively juxtaposing them to depict the inappropriateness of the penalty. Marshall said that it was app roved by the Supreme Court to be practiced in fairness and justice, however, the promise has turned into empty mockery Blackmun on the other hand rejected it saying he would not be part of a system fraught with arbitrariness, discrimination, caprice and mistake†