Physics of racing Research Paper Example | Topics and Well Written Essays - 750 words

Physics of racing - Research Paper Example 2). Several formulas will determine the calculations made in the research paper to determine several aspects of the mechanics involved in motorcar racing. Introduction The wide-ranging goal of the research paper is to put forward a new prospect on racing physics, comprehensible to the practically motivated non-specialist (Beckman, 2002, p. 6). There are a number of problems that are frequently regarded from a range of sources, capable of preventing quality results from determining the physics behind racing. Regularly, these issues are inclined by automated simulation, and they regularly come up from contest experiences. This research paper will also get extremely technical, attempting to balance a conceptual discourse that every individual ought to get to comprehend. Through an arithmetic analysis, the following paper may be of great interest just to physicists, and with numerical outcomes that might once more be available to all analysts worldwide. Weight transfer Balancing a vehicl e is directing weight transfer through the use of acceleration, brakes and piloting. Applying the brakes adjusts weight to the anterior part of the vehicle, enabling the driver to prompt over-steering of the vehicle. In a similar fashion, throttling adjusts the weight of the vehicle to the back of the vehicle, prompting under-steering and cornering adjusts weight to the reverse side, unpacking the interior part of the wheels (Beckman, 2002, p. 12). The reason behind this adjustment in the weight of the vehicle is that inertia acts via the center of gravity (CG) of the vehicle, which is on top of the ground level. At the same time, adhesive forces act at ground levels via the touching base spots of the wheels. The impacts of weight transfer are relative to the elevation of the CG from the ground. If a much flatter vehicle with a decreased CG was involved in racing, its handling would be much improved and velocity would be higher because weight transfer is not very extreme in comparis on with a much less flat vehicle. The measurement of inert friction is not precisely a constant. Under driving circumstances, numerous effects are used to decrease inert friction of an excellent autocross wheel to an estimated 1.10G (Beckman, 2002, p. 21). These outcomes are a refraction of the wheel, suspension motion, heat and the inflation compression. Nevertheless, the relativity law still stands sensibly true under these circumstances. When the vehicle is accosting, braking, or throttling at the edge, this implies that the adhesive parameters of the wheels can cause them to unload by the weight transfer’s shifting from sticking to sliding off the ground. Each time a vehicle tilts a little or gets a little sideways, the vehicle will most likely lose the race if the mistake is not made up through recovery of laps. Certain calculations formulas and elements can be used to determine the forces and inclinations vehicles and their drivers can make to succeed in a race. For ins tance, in order to make a right turn, a force indicating the right is obliged to act on the vehicle that steer it away from the unbent line it unsurprisingly attempts to pursue. Should the force remain steady, the vehicle will be inclined to move in a circular manner (Beckman, 2002, p. 29). Basic laws Basically, there are three laws that have to be agreed so as

Gospel Music Features in the Christian Liturgy of the Pentecostal Essay

Gospel Music Features in the Christian Liturgy of the Pentecostal Church - Essay Example James (2001, p. 56) claims that the style of gospel music that exists in any given Pentecostal church depends partly on the age of the singers. Thus, the senior adult tend to prefer the transitional and traditional gospel music while, the young adults prefer modern gospel music that may predominate the main worship service. Whatever the period and age, the singing is given in the form of gospel songs in the Pentecostal churches. Development of gospel music People who were enslaved and worked in the field during the civil war told their stories in the spiritual way explaining their current life and teaching their children on the hardship they endured. When the enslaved adopted the Christian religion, their faith naturally became the focus of their songs. However, their songs were no longer limited to the spiritual because they started using the hymns written by white composers like Isaac Watts and Wesleys. The enslaved accepted the gospel music because it was attributed to their style and culture, especially the meter hymn that is still used in the most Pentecostal churches. As the civil war came to an end and enslaved were finally emancipated, it marked the beginning of what is referred to the historical gospel hymns. According to James (2001, p. 55), these songs flourished during the social and economic deprivation of depression and started to make their way out of the Pentecostal churches. According to Anderson and James (2007, p. 285) indicate that the civil rights movement brought rebirth of older songs, especially spiritual songs that became the freedom songs. These spiritual songs were the bridge between what is known as historical gospel and modern gospel songs. The publicizing of the Pentecostal churches and protest brought a wider exposure to the gospel music and its popularity spread. Currently, the modern gospel is one of the most popular sounds in the music industry. In the twentieth century, the most widespread and celebrated of the people traditio n was the growth and development of gospel music, especially in the Pentecostal churches. These churches were visited by the traveling musicians and evangelists from the Chicago gospel scene like Sallie Martin and Thomas Dorsey. Despite this contact with new gospel sounds, arranged spirituals, and hymns were still popular styles of church music. Pastors and Pentecostal churches supported the expansion of gospel music by starting gospel choirs and hosting outstanding concerts in various Pentecostal churches like opportunity Baptist. Various composers started transcribing and publishing their gospel music and gospel performers protected themselves from exploitation by forming gospel unions. Anderson and James (2007, p. 289) indicate that the gospel growth extended beyond churches in the black community and moved to worldly white venues around the city. Most of the gospel composers and performers received attention via television programs, firms and release of albums by choirs. Thus, t he developed technology has assisted a lot in developing the gospel music worldwide. Many gospel singers have developed new styles of singing and different, exciting music ministries. From neo spiritual to the modern gospel and praise and worship music, these song writers reflect the range of gospel music in Pentecostal churches today. The gospel music composers Wallace (2005, P. 104) indicates that the gospel music was brought substantial change in the Pentecosta

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

Travelling - Essay Example Moscow and London both are quite famous for travelling. They provide various entertainment packages such as restaurants, galleries, museums, parks, clubs etc. before traveling it is essential to plan everything such as place to visit, expenditure, budget etc. selection of place is based on all these major factors. There are more restaurants in London as compared to Moscow. But these restaurants are very expensive, while the cost of living in Moscow is 39% cheaper as compared to London. This means that a standard of living in London will require $3000. But if a person travels to Moscow one will require just $1830. While the transport network of Moscow is far better than London. In London cinema and other entertainment center are 5% higher than that of Moscow. This shows that traveling to Moscow will be cheaper and beneficial for visitors as compared to London. Travelling provides many benefits to people. It helps to gain experiences and knowledge of various countries because while vis iting to the ancient and architectural places of a country such as Moscow, one can get more knowledge in relation to various systems and culture of a country. It is beneficial for both students as well as parents. They can not only be familiar of one’s culture but will also have a chance to learn new languages. People have many motives to travel such as to discover something new, for pleasure, to explore, for relaxation and to learn other cultures. Therefore, I think one should keep on travelling throughout his or life.

First People of Canada Essay Example for Free

First People of Canada Essay The purpose of the writer is to present his analysis of the present condition of the educational system of Canada which he regards as colonial education for the aborigines of Canada. He examined the manner in which the Indigenous education and epistemologies have been ignored and undermined and made recommendations on the revitalization of an education reflective of the needs and sentiments and culture of the Aboriginal Canada. The article is based on facts and not opinion. The information given are well researched and are supported as the writer presented evidences that the present educational system has â€Å"physically, spiritually and mentally destructive and disruptive components of colonial education (p. 3)† The objective of the author is well achieved as his arguments are logical. His choice of language is effective for his intended audience is the general public especially the education sector who needs to do something about the colonial education. The author discussed that the residential schooling and the Eurocentric schooling and the curriculum are not reflective of the culture of the Aborigines and were far different from the traditional education. The education then is colonial and beyond the experiences and the daily life of the Aborigines. It needs to be reformed. The author is successful in letting his audience understand his point because his illustrations why he takes the education of Canada as colonial are very effective.

1,2,4-Oxadiazole Moiety Molecules Synthesis for Cancer

1,2,4-Oxadiazole Moiety Molecules Synthesis for Cancer 2.4. Synthesis of 3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-5-substituted-1,2,4-oxadiazole derivatives for their MTT assay using MCF-7 breast cancer cell line and degradation of DNA in EAT cells 2.4.1. INTRODUCTION In the biological and pharmacological importance, heterocycles plays a significance role. Oxadiazole molecules show biologically activity includes angiogenesis inhibitor [246] and also HIV inhibitor [247], tyrosine kinase inhibition [45], histamine H3 antagonism [48], muscarinic agonism [49], potent histamine H2 receptor antagonists [50, 51], muscarinic receptor antagonists [53, 54], interleukin-8 (IL-8) receptor antagonists [65], cytotoxic activities [68], monoamine oxidase inhibition [66], potent therapeutic agents for prostate cancer [72], anticonvulsant activity [67], tumor-selective and apoptosis-inducing agents [70, 71], antitumor [4f] and apoptosis-inducing anticancer agents [73, 74]. Breast cancer is a most terrifying disease in which cells in breast tissue grow and divide without normal control. This type of growth of cells without control forms a lump called tumor. In breast cancer, tumors are called benign or malignant. Malignant tumors will grow by eating food. They get the food by forming new blood vessels in a process called angiogenesis. These blood vessels are the main reason to promote the growth of the tumors. After this tumor growing it will spread to nearby tissue, which is called as invasion. The breakage of main tumor cells will spread into other parts of the body and it will lead to metastatic breast cancer. This happens through blood stream or lymphatic system and this process is called metastasis. The main disadvantage of the malignant breast cancer is dividing and grows out of control which leads to form number of new tumors. If those new tumors are in other parts of the body, then also we call those as breast cancer. Especially in women, breast cancer leading to the cause of cancer related death. In developing and developed countries, breast cancer is the second most common malignancy type diagnosed disease in women. In India breast cancer is the most discussing problem in the current health problem (248). By the survey conceded by the Indian Council of Medical Research (ICMR), the percentage of breast cancer patients has been nearly doubled. In the past few years nearly one lakh new patients are being detected from 1985 to 2001 (249, 250). It has been estimated that the breast cancer in 2004 is nearly 90,273 and they predicted that in 2015 the patient’s number may be nearly 1, 12,680 (251). Due to the damage in DNA, normal cells will become cancer cells. DNA is present in every cell and it directs to all its actions. When DNA gets damaged in normal cells, the cell either repairs the damage or it dies. But in the cancer cells, damaged DNA is not repaired. The damaged cell undergoes splitting. As a result cell goes on making new cells that the body doesn’t need and those cells have same damaged DNA as the first cells does. This conjecture the design and synthesis of new anticancer drugs, and drug combination and treatment modalities is still the need for effective treatment of breast cancer patients [252]. 1,2,4-Oxadiazole moiety molecules show signs of vide variety of biological activities [40, 253-255]. In connection to the above studies, our molecules are subjected to the angiogenesis using MCF-7 breast cancer cell lines and degradation of DNA studies using in EAT cells. 2.4.2. MATERIALS Melting points were recorded (uncorrected) on a Buchi Melting Point B-545 instrument. Infrared (IR) spectra were recorded using a Jasco FTIR-4100 series. All reagents and solvents used were commercially procured and used as received. 1H-NMR spectra’s were recorded on Shimadzu AMX-400-Bruker with 400 MHz with TMS as internal standard. The 13C NMR spectra were examined on a Bruker DPX-400 at 100.6 MHz. The mass spectra were recorded on a JEOL JMS-AX505HA mass spectrometer. 2.4.3. EXPERIMENTAL 2.4.3.1. Chemistry General procedure for synthesis of (Z)-4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluoro-N-hydroxybenzimidamide (2). A solution of hydroxylamine hydrochloride (1.529 g, 22.004 mmol) (2.5eq) and sodium carbonate (1.492 g, 14.082 mmol) (1.6eq) was taken in a round bottom flask. Stir for 10min to dissolve completely, then to this mixture 4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorobenzonitrile (1) (2.0 g, 8.801 mmol) (1.0 eq) is dissolved with ethanol was added. Then the mixture is heated to 60 0C about 5-6 hr. After that the steps forward of the reaction fusion was examined by the thin layer chromatography (TLC). After reaction completion, the solvent and the product was separated in vacuum pump under reduced pressure. Then the product was poured to water and extracted with ethyl ethanoate. The organic layer was washed 2-3 times with distilled water. The organic layer was washed 2-3 times with distilled water. The extracted ethyl ethanoate layer was dried over sodium sulphate (anhydrous) and the solvent was evaporated to get (Z)-4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluoro-N-hyd roxybenzimidamide (2). 2.4.3.2. Synthesis of 3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-5-substituted-1,2,4-oxadiazole 4(a-f) derivatives. (Z)-4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluoro-N-hydroxybenzimidamide (2) (1.0 eq) is dissolved in dry dichloromethane and cooled to 0-5 0C in ice bath. Then N,N-diisopropylethylamine (1.1 eq) was added to cold reaction mixture and stirred for 10 minutes, then different aromatic acid chlorides (3a-e) (1 eq) were added. The reaction mixture was allowed to room temperature under stirring for 5-6 hr. After that the steps forward of the reaction fusion was examined by the thin layer chromatography (TLC). After reaction completion, the solvent and the product was separated in vacuum pump under reduced pressure. Then the product was poured to water and extracted with ethyl ethanoate. The organic layer was washed 2-3 times with distilled water. The organic layer was washed 2-3 times with distilled water. The extracted ethyl ethanoate layer was dried over sodium sulphate (anhydrous) and the product was purified with the help of column chromatography over silica gel (60-120 mesh) using hexane and ethyl acetate (1:1). Scheme 1. Reagents and conditions: (i) Sodium carbonate, water, ethanol, 60 0C, 6 h; (ii) dichloromethane, N,N-diisopropylethylamine, 0-5 0C, 6 h; 3(a-e) Where 3a = 4-chloro benzoyl chloride; 3b = 4-Fluoro benzoyl chloride; 3c = 4-(trifluoromethyl)benzoyl chloride; 3d = 4-Fluoro-3-Nitrobenzoyl chloride; 3e = 4-EthylPhenylbenzoyl chloride. 2.4.3.2.1. Synthesis of 5-(4-chlorophenyl)-3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-1,2,4-oxadiazole (4a) Pale yellow color from (Z)-4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluoro-N-hydroxybenzimidamide (2) (0.1 g, 0.384 mmol), 4-chlorobenzoylchloride (3a) (0.067 g, 0.384 mmol) and N,N-diisopropylethylamine (0.049 g, 0.461 mmol). 1H NMR (400 MHz, CDCl3): 8.32 (d, 1H, Ar-H), 7.75 (dd, 2H, Ar-H), 7.70, (d, 1H, imid-H), 7.55 (d, 1H, Ar-H), 7.50 (dd, 2H, Ar-H), 7.35 (d, 1H, imid-H), 7.30 (d, 1H, Ar-H), 5.05 (d, 1H, pyrrole-H), 2.56-2.30 (d, 4H, pyrrole-H); MS (ESI) m/z: 381.081 (100.0%), Anal. calcd. for C20H14ClFN4O (in %): C- 63.08, H- 3.71, N- 14.71. 2.4.3.2.2. Synthesis of 3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-5-(4-fluorophenyl)-1,2,4-oxadiazole (4b) Orange color from (Z)-4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluoro-N-hydroxybenzimidamide (2) (0.1 g, 0.384 mmol), 4-Fluoro benzoyl chloride (3b) (0.060 g, 0.384 mmol)and N,N-diisopropylethylamine (0.049 g, 0.461 mmol). 1H NMR (400 MHz, CDCl3): 8.31 (d, 1H, Ar-H), 7.30 (dd, 2H, Ar-H), 7.72, (d, 1H, imid-H), 7.56 (d, 1H, Ar-H), 7.34 (d, 1H, imid-H), 7.31 (d, 1H, Ar-H), 7.29 (dd, 2H, Ar-H), 5.02 (d, 1H, pyrrole-H), 2.58-2.31 (d, 4H, pyrrole-H); MS (ESI) m/z: 365.114 (100.0%), Anal. calcd. for C20H14F2N4O (in %): C- 65.93, H- 3.87, N- 15.38. 2.4.3.2.3. Synthesis of 3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-5-(4-(trifluoromethyl)phenyl)-1,2,4-oxadiazole (4c) Dark brown color from (Z)-4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluoro-N-hydroxybenzimidamide (2) (0.1 g, 0.384 mmol), 4-(trifluoromethyl)benzoyl chloride (3c) (0.080 g, 0.384 mmol) and N,N-diisopropylethylamine (0.049 g, 0.461 mmol). 1H NMR (400 MHz, CDCl3): 8.33 (d, 1H, Ar-H), 8.10 (dd, 2H, Ar-H), 7.74 (d, 1H, imid-H), 7.70 (dd, 2H, Ar-H), 7.58 (d, 1H, Ar-H), 7.37 (d, 1H, imid-H), 7.33 (d, 1H, Ar-H), 5.06 (d, 1H, pyrrole-H), 2.59-2.29 (d, 4H, pyrrole-H); MS (ESI) m/z: 415.110 (100.0%), Anal. calcd. for C21H14F4N4O (in %): C- 60.87, H- 3.41, N- 13.52. 2.4.3.2.4. Synthesis of 3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-5-(4-fluoro-3-nitrophenyl)-1,2,4-oxadiazole (4d) Pale yellow color from (Z)-4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluoro-N-hydroxybenzimidamide (2) (0.1 g, 0.384 mmol), 4-Fluoro-3-Nitrobenzoyl chloride (3d) (0.078 g, 0.384 mmol)and N,N-diisopropylethylamine (0.049 g, 0.461 mmol). 1H NMR (400 MHz, CDCl3): 8.71 (d, 1H, Ar-H), 8.65 (d, 1H, Ar-H), 8.34 (d, 1H, Ar-H), 7.74 (d, 1H, imid-H), 7.61 (dd, 1H, Ar-H), 7.58 (d, 1H, Ar-H), 7.37 (d, 1H, imid-H), 7.33 (d, 1H, Ar-H), 5.06 (d, 1H, pyrrole-H), 2.59-2.29 (d, 4H, pyrrole-H); MS (ESI) m/z: 410.099 (100.0%), Anal. calcd. for C20H13F2N5O3 (in %): C- 58.68, H- 3.20, N- 13.52. 2.4.3.2.5. Synthesis of 3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-5-(5-ethyl-[1,1-biphenyl]-2-yl)-1,2,4-oxadiazole (4e). White color from (Z)-4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluoro-N-hydroxybenzimidamide (2) (0.1 g, 0.384 mmol), 4-EthylPhenylbenzoyl chloride (3e) (0.094 g, 0.384 mmol) and N,N-diisopropylethylamine (0.049 g, 0.461 mmol). 1H NMR (400 MHz, CDCl3): 8.31 (d, 1H, Ar-H), 7.95 (d, 1H, Ar-H), 7.80 (dd, 2H, Ar-H), 7.75 (d, 1H, Ar-H), 7.72, (d, 1H, imid-H), 7.53 (dd, 2H, Ar-H), 7.56 (d, 1H, Ar-H), 7.45 (d, 1H, Ar-H), 7.34 (d, 1H, imid-H), 7.30 (d, 1H, Ar-H), 7.31 (d, 1H, Ar-H), 5.03 (d, 1H, pyrrole-H), 2.65 (q, 2H, -CH2), 2.58-2.31 (d, 4H, pyrrole-H), 1.27 (t, 3H, -CH3),; MS (ESI) m/z: 451.186 (100.0%), Anal. calcd. for C28H23FN4O (in %): C- 74.65, H- 5.15, N- 12.44. 2.4.4. Biology 2.4.4.1. Culture of MCF-7 cells: MCF-7 cells were cultured with minor modification in Minimal Essential medium (Invitrogen) supplemented with 10% fetal bovine serum, 100units/ml penicillin-G, 100  µg/ml streptomycin and 1% sodium bicarbonate (Invitrogen). MCF-7 cells were obtained from Cell repository unit of National Center for Cell Sciences (NCCS), Pune, India. All cell lines were maintained at 37 °C in a humidified atmosphere with 5% CO2 [256]. 2.4.4.2. Culture of EAT cells: Animals, in vivo tumor generation and imidazole derivatives treatment Six to eight weeks old female mice were acclimated for one week while caged in-group of five. Mice were housed and fed a diet of animal chow and water ad libitum throughout the experiment. All the experiments were approved by the institutional animal care and use committee of the University of Mysore, Mysore, India. Ehrlich Ascites Tumor (EAT) cells (5Ãâ€"106 cells/mouse) were injected intraperitoneally. These cells grow in mouse peritoneum forming an ascites tumor with massive abdominal swelling. The animals showed a dramatic increase in body weight over the growth period and the animals succumbed to the tumor burden 14–16 days after implantation. 2.4.4.2.1. Isolation of EAT cells from mice peritoneal cavity and compound treatment: From the peritoneal cavity of tumor-bearing mice the EAT cells were isolated (control and treated). 2-3 mm of sterile PBS was injected in to the peritoneal cavity of the mice and the peritoneal fluid containing tumor cells withdrawn, collect in sterile petri dishes and incubated at 370C for 2 h. The cells of macrophage linage adhered to the bottom of Petri dishes. The non-adherent population was aspirated out gently and washed repeatedly with PBS. Moreover, viability of these cells was assessed and was found to be >95% by trypan blue dye exclusion. The viable EAT cells were processed for further experiments. The EAT cells (5 x 106) were treated with or without compounds of 3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-5-substituted-1,2,4-oxadiazole series 4(a-e) and incubated at 370 C for different time interval or for known period of time. After the incubation period the cells w ere used for the further analysis [258]. 2.4.4.2.2. Cell count by Trypan blue dye exclusion assay. EAT cells were treated with different concentrations of 3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-5-substituted-1,2,4-oxadiazole compounds 4(a-e) at various time periods (0–4 h). Cell viability was assessed by mixing aliquots of cell suspension with 0.4% trypan blue and counted using heamocytometer. Cells that picked up the dye were considered to be dead [259(a)]. 2.4.5. Result and Discussion 2.4.5.1. Chemistry Synthesis of the key intermediate (Z)-4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluoro-N-hydroxybenzimidamide (2) is outlined in Scheme 1. Briefly, hydroxylamine hydrochloride and sodium carbonate was taken in water and stirred. 4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorobenzonitrile (1) was dissolved in ethanol and added to the reaction mixture. The presence of –NH2 and =N-OH proton peaks NMR spectra indicates the formation of (Z)-4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluoro-N-hydroxybenzimidamide (2). The key intermediate compound (2) was taken in dry dichloromethane and cooled to 0-5 0C, and N,N-diisopropylethylamine was added. Stirred for 10 min, then different aromatic acid chlorides 3(a-e) was added drop by drop. The reaction mixture was allowed to room temperature under stirring for 5-6 h and after that the steps forward of the reaction fusion was examined by the thin layer chromatography (TLC). After reaction completion, the solvent and th e product was separated in vacuum pump under reduced pressure. Then the product was poured to water and extracted with ethyl ethanoate. The organic layer was washed 2-3 times with distilled water to get target 3-(4-(3-(1H-imidazol-5-yl)propyl)-3-fluorophenyl)-5-substituted-1,2,4-oxadiazole 4(a-e). Upon completion crude products 4(a-e) were obtained with a good yield of 81–93% and which the product was purified with the help of column chromatography over silica gel (60-120 mesh) using hexane and ethyl acetate (1:1). The absence of –CO proton peak in synthesized derivatives in 1H spectra confirmed the identity of the products. The details of chemical structures, physical data and purity of compounds are given in Table 1. Compound R1 Yield MP (oC) Purity 4a 90 277 90 4b 85 100 93 4c 81 110 89 4d 82 142 92 4e 79 95 81 Table 1. Chemical structures, physical data and purity of compounds 4(a–e) 2.4.5.2. Biology 2.4.5.2.1. MTT assay: The MTT assay was performed according to the protocol previously reported [257]. MCF-7 cells were plated at a density of 1 X 105 cells in 96-well plates. (Subsequently, the 3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-5-substituted-1,2,4-oxadiazole series 4(a-e) were assayed using concentrations from 0.05 to 0.5 mM). After 24 h of incubation, 10  µL of 5% 3-(4,5- dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) (Sigma Aldrich) (0.05 mg/mL) were added to the culture medium. After 4 h at 370C the culture medium was removed and 200  µL of DMSO were added to dissolve the salts of formazan. The absorbance was measured with a 96-wells plate spectrophotometer at 570 nm. The experiments were independently performed three times and each experiment contained triple replicates. Control samples containing a complete culture medium devoid of cells or control cells with 0.1% DMSO were also included in each experiment. Figure 1. The MTT assay of compounds 4(a-e) in MCF-7 breast cancer cell lines. Sl.No. Name of the compound IC50 Value 1 Cisplatin 10ÃŽ ¼g 2 4a 100ug 3 4b 200ug 4 4c 100ug 5 4d 800ug 6 4e 200ug Table 2. Compounds 4(a-e) and their IC50 value ( µg/ml) on MCF-7 breast cancer cell lines. 2.4.5.3. DNA fragmentation assay: EAT cells were collected from mice treated with or without 3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-5-substituted-1,2,4-oxadiazole series 4(a-e). Thein vivo and DNA was isolated using the phenol–chloroform method. In brief, cells were lysed in a buffer containing 50mM Tris–HCl, pH 8.0, and 0.5% SDS, and incubated for 30min at 37 °C. The cell lysate was subjected to 8M potassium acetate precipitation and left for 1h at 4 °C. The supernatant was subjected to phenol/chloroform/isoamyl alcohol (25:24:1) extraction and once to chloroform extraction. DNA was precipitated by adding 1:2 volumes of ice-cold ethanol. The precipitated DNA was dissolved in 50ÃŽ ¼L TE buffer (pH 8.0). The DNA was digested with 20ÃŽ ¼g/mL RNase at 37 °C for 1h. The DNA was quantitated and equal concentration of DNA (25ÃŽ ¼g) was resolved on 1.5% agarose gel, viewed under UV light, and documented using BIORAD gel documentation system Figure 2 [259(b)]. Figure 2. The DNA degradation of compounds 4(a-e) in Ehrlich Ascites Tumor (EAT) cells. Conclusion: A series of 3-(4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorophenyl)-5-substituted-1,2,4-oxadiazoles 4(a-e) has been synthesized by using simple synthetic procedures and were screened for their MTT assay using MCF-7 breast cancer cell line and degradation of DNA in Ehrlich Ascites Tumor (EAT) cells activity. All the final compounds exhibited good in all the in-vitro activity.

Ipswich Shellfish Delivers Fresh Lobster :: essays research papers

Ipswich Shellfish Company has a very unique marketing channel and strategy. There business is very specialized and their product characteristics will vary by fish, but not by quality. Ipswich is very confident that they can deliver fresh seafood within 24 hours around the world. Another product characteristic that they offer is a extensive variety of exotic seafood that people across the world can now enjoy. Some channel conflicts that they might run into is that they will deliver to anyone for the right price. This is much easier said then done but Ipswich delivers. To do this they need to have good relationships with their shipping affiliates. If their product goes bad then they lose money. Another problem that they might try to avoid would be sending out substandard seafood. If they do and their buyer tries to back out of the sale, they again will lose money. They are also facing rival businesses that must make their prices competitive and quality one grade better then other’s. It sounds like to me that Ipswich Shellfish must run a very tight business to survive. They are taking risks at many points and are relying for those risks to make profit. Therefore I would have to say that at this time it will not hinder their business to stay away from integration. This definitely will reduce the possibilities of extreme growth within their company, but also will reduce the possibilities of extreme losses that Ipswich could take. This way they are able to keep themselves out of the restaurant business, and out of the fishing business where they would have to sink a lot of money into something that they are not accustomed to. Intermodal coordination is key for this company to be able to distribute in such vast areas in such a small time. If they cannot coordinate between air carriers, land carriers and sea carriers then there product will go to waste. But on the other hand once they acquire the talent to coordinate their distribution channels they are able to serve many more markets and increase the volume of their sales. Being proficient with their shipping partners will enable them to gain security of their product. Without these companies Ipswich could not deliver shellfish very far, they would die within 24 hours if not properly cared for. This cost is great for Ipswich but essential in their growth process.

Research Paper Helicobacter Pylori

Helicobacter pylori| Previously named Campylobacter pyloridis, is a Gram-negative, microaerophilic bacterium found in the stomach. | | Microbiology (B1325) Research Paper| Detailed Introduction Helicobacter pylori are a species of epsilon proteobacteria which colonizes the harsh environment of the human stomach. Its name refers to both its spiral shape (Helicobacter) and the area of the lower stomach which it habitually colonizes: the gateway (pylorus) between the stomach and small intestine (Meyers, 2007).This bacterium is thought to be present within up to 50% of the human population and has been linked to the development of a number of different medical conditions (Chalmers et al. 2004). This report will provide information about the discovery of H. pylori as well as its morphological characteristics, taxonomic information, biochemical/metabolic characteristics, chemotherapeutic methods of control/treatment/eradication, immunological responses, pathological information, and epidem iology information. Morphological Characteristics Helicobacter pylori are a spiral-shaped, Gram-negative rod approximately 0. x 3. 0 micrometers in size. It is catalase-positive organism which has 4-6 sheathed flagella attached to one pole which allow for motility. It lives in the human stomach and duodenum. H. pylori possess five major outer membrane protein (OMP) families. The largest family includes known and putative adhesions. The other four families include porins, iron transporters, flagellum-associated proteins and proteins of unknown function. Like other typical Gram-negative bacteria, the outer membrane of H. pylori consists of phospholipids and lipopolysaccharide (LPS).The O antigen of LPS may be fucosylated and mimic Lewis blood group antigens found on the gastric epithelium. The outer membrane also contains cholesterol glucosides, which are found in few other bacteria. H. pylori has four to six lophotrichous flagella; all gastric and enterohepatic Helicobacter species a re highly motile due to flagella. The characteristic sheathed flagella filaments of Helicobacter are composed of two copolymerized flagellants, FlaA and FlaB. [1](From Wikipedia, the free encyclopedia). Taxonomic Information Helicobacter pylori are a gram-negative, spiral-shaped organism associated with gastrointestinal disease in humans.It has a worldwide prevalence, with approximately 50% of the world's population infected. Before the first isolation and documentation of this organism from the human stomach in 1982, it was assumed that the human stomach was a sterile environment because of the high levels of acid, which would exclude it as an ecologic niche for any organism. This bacterium is the human-adapted Helicobacter primarily found in the gastric mucosa and areas of gastric metaplasia in the duodenum and occasionally in Meckel's diverticulum and the rectum. It has been cultured rarely from feces, blood, and saliva.It can be detected by polymerase chain reaction (PCR) in den tal plaque and feces. In the latter instances, the viability of the bacteria is in question. H. pylori also have been found in nonhuman primates and cats. H. pylori detection in animals is not common and could be due to human contact with animals. To date, no environmental reservoir has been shown. [2](http://www. gastro. theclinics. com/article/S0889-8553(05)70135-7/abstract) Biochemical/Metabolic Characteristics The genus Helicobacter was created in 1989 with H. pylori as the type species. Since then the genus has expanded to include about 18 species.Some species were reclassified from Campylobacter, but most were newly discovered microorganisms from gastric or intestinal sites in mammalian host animals. The essential property of almost all helicobacter is the presence of sheathed flagella. Most species possess strong ureolytic ability, particularly those associated with gastric mucosa, and exhibit considerable diversity in cell morphology with respect to cell length, number and l ocation of flagella, and presence of periplasmic fibrils. H. pylori have a global distribution and infect human gastric mucosa exclusively but there is some evidence for infection in cats.Genomes of isolates from different individuals are unusual in their diversity in gene order and sequences within individual genes. ‘H. heilmannii1 is another gastric spiral shaped organism less frequently infecting humans but commonly found in cat and dog gastric tissue. H. felis is important in the mouse model of infection. A range of conventional phenotypic tests as well as some new PCR based assays are available for identifying isolates of Helicobacter from clinical specimens. [11]( http://bmb. oxfordjournals. org/content/54/1/17. full. pdf) Chemotherapeutic Methods of Control, Treatment, and EradicationTreatment If you are found to have Helicobacter pylori infection, you may wish to have antibiotic treatment of some kind. Treatment of Helicobacter pylori is usually simple ; straight forwa rd. However, occasional patients need repeated endoscopies, biopsies, breath tests and several courses of treatment with different antibiotic combinations. After treatment of H. pylori, it is necessary to repeat one of these tests to see if the germ has been killed or eradicated for good. Only breath tests or endoscopy with biopsy can be used to prove that the bacterium has been eradicated.The blood tests *(serology) is not suitable to monitor H. pylori eradication because antibodies to H. pylori may remain positive for months or even years after successfully killing the H. pylori. [3] (http://www. helico. com/? q=TreatmentForHelicobacterPylori) Eradication Prolonging the treatment period is a possible strategy for improving H. pylori eradication rates. Several studies have been published that tested this approach, including this paper by Calvet et al. These authors studied the value of extending PPI-based triple therapy from 7 to 10 days and found no additional benefit for patients with peptic ulcers.There was, however, a significant benefit for nonulcer dyspepsia patients (an increase from 66% to 77% in the intention-to-treat analysis and from 73% to 91% in the per-protocol analysis). The authors concluded that the treatment period should be extended from 7 to 10 days for patients with nonulcer dyspepsia. As most eradication therapy, however, is given to patients with uninvestigated dyspepsia, it is not unreasonable to argue that longer therapy should be given to all subjects. Distinguishing between patients with ulcer and nonulcer dyspepsia is therefore rather academic and impractical.The most obvious one is that existing PPI-based triple therapy regimens are not perfect. In the community at large, up to 30% of patients might fail this therapy. If clinicians prescribe triple therapy it should therefore be prescribed for longer than 7 days. This runs the risk of decreased patient compliance, more side effects and a greater cost, but ultimately it boils down to local and national guidelines, which vary from one country to another. Alternatively, clinicians might consider some of the newer eradication approaches, such as use of fluoroquinolone-based therapy or sequential treatment.The latter comprises quadruple therapy over a 10-day period, starting with a PPI plus amoxicillin (1,000 mg twice daily) for the first 5 days, followed by PPI plus clarithromycin (500 mg twice daily) and tinidazole (500 mg twice daily) for another 5 days. Intention-to-treat analysis eradication rates of 97%, 92%, and 94% have been reported in children, adults and elderly patients, respectively. Ultimately, clinicians should still strive towards a much simpler eradication strategy, but this will require investment in novel antibiotic discovery or a better understanding of the pathogenesis of H. ylori. Either way, there is much to be gained from continued interest in this little organism. [4](http://www. medscape. com/viewarticle/525100_2) Immunological Responses Lifelong Helicobacter pylori infection and its associated gastric inflammation underlie peptic ulceration and gastric carcinogenesis. The immune and inflammatory responses to H. pylori are doubly responsible: gastric inflammation is the main mediator of pathology, and the immune and inflammatory response is ineffective, allowing lifelong bacterial persistence.However, despite inducing gastric inflammation, most infections do not cause disease, and bacterial, host and environmental factors determine individual disease risk. Although H. pylori avoid many innate immune receptors, specific virulence factors (including those encoded on the cag pathogenicity island) stimulate innate immunity to increase gastric inflammation and increase disease risk. An acquired T helper 1 response up regulates local immune effectors. The extent to which environmental factors (including parasite infection), host factors and H. ylori itself influence T-helper differentiation and regulatory T-cell response s remains controversial. Finally, effective vaccines have still not been developed: a better understanding of the immune response to H. pylori may help. [5](http://www. ncbi. nlm. nih. gov/pubmed/17382275) Pathological Information Until the discovery of Helicobacter in 1982, ulcers were thought to be caused by stress. Now it is known that ulcers, in addition to gastritis, are caused by a bacterial infection of H. pylori. Though relatively easy to treat with antibiotics, H. ylori can be a risk factor for gastric cancer if it becomes a long-term infection [6] (Stated by D. J. Kelly, 2004. The University of Sheffield). The body's natural defenses cannot combat H. pylori because white and killer T cells cannot easily get through the stomach lining. The defense cells eventually die, spilling their superoxide radicals on stomach lining cells, on which H. pylori can feed[6] (Stated by Helicobacter Foundation, 2004). Epidemiology Information The frequency of H pylori infection in the United States may be linked to race. White persons account for 29% of cases, and Hispanic persons account for 60% of cases.Internationally, H pylori are a ubiquitous organism. At least 50% of all people are infected, but an exact determination is not available, mostly because exact data are not available from developing countries. H pylori may be detected in approximately 90% of individuals with peptic ulcer disease; however, less than 15% of infected persons may have this disease. The mortality rate related to H pylori infection is not precisely known, but it seems to be minimal (i. e. , approximately 2-4% of all infected people). Mortality is due to the complications of the infection, uch as gastric ulcer perforation or MALTomas of the GI tract. Otherwise, the morbidity of H pylori infection can be very high. [7](http://emedicine. medscape. com/article/176938-overview#a0199) The pathogenetic role of H pylori may differ depending on geography and race. White persons are infected with H p ylori less frequently than persons of other racial groups. The prevalence rate is approximately 20% in white persons, 54% in African American persons, and 60% in Hispanic persons. No sex predilection is known; however, females have a higher incidence of reinfection (5-8%) than males.H pylori infection may be acquired at any age. According to some epidemiologic studies, this infection is acquired most frequently during childhood. Children and females have a higher incidence of reinfection (5-8%) than adult males. [7](http://emedicine. medscape. com/article/176938-overview#a0199) Cultural Characteristics Approximately two-thirds of the world’s population is infected with H. pylori. In the United States, H. pylori are more prevalent among older adults, African Americans, Hispanics, and lower socioeconomic groups. It is not known how H. ylori are transmitted or why some patients become symptomatic while others do not. The bacteria are most likely spread from person to person thro ugh fecal-oral or oral-oral routes. Possible environmental reservoirs include contaminated water sources. Iatrogenic spread through contaminated endoscopes has been documented but can be prevented by proper cleaning of equipment. [8](Centers for disease and control prevention) Case Study 1 Title: Correlation of Helicobacter pylori and gastric carcinoma. Authors: Khanna, AK, Seth, P, Nath, G, Dixit, V K, Kumar, M Issue Date: 26-Jan-2002Citation: Khanna AK, Seth P, Nath G, Dixit VK, Kumar M. Correlation of Helicobacter pylori and gastric carcinoma. Journal of Postgraduate Medicine. 2002 Jan-Mar; 48(1): 27-8 Language: Eng. Type: Journal Article Abstract: BACKGROUND: Difference of opinion about the prevalence of H. pylori association with gastric cancer exists in the literature. AIMS: To study the correlation of Helicobacter pylori (H. pylori) to gastric carcinoma. METHODS: 50 proved cases of gastric cancer were studied by rapid urease test, culture, histopathology and ELISA test for H. pylori IgG.RESULTS: 68% of cases of gastric cancer were found to be positive for H. pylori infection as compared to 74% of healthy controls. CONCLUSIONS: The prevalence rate of H. pylori infection in our patients of gastric cancer was lower than in the control population though statistically not significant, suggesting that H. pylori may not be responsible for gastric carcinogenesis in this population. Source URI: http://www. jpgmonline. com URI: http://imsear. hellis. org/handle/123456789/116058 MeSH: * Adult * Case-Control Studies * Enzyme-Linked Immunosorbent Assay * Female Helicobacter Infections –complications * Helicobacter pylori –isolation & purification * Humans * Male * Middle Aged * Prevalence [9](http://imsear. hellis. org/handle/123456789/116058Stomach Neoplasms –microbiology) Case Study 2 Title: Helicobacter pylori in dental plaque of children and their family members. Authors: Gill, H H, Shankaran, K, Desai, H G Issue Date: 1-Sep-1994 Citation: G ill HH, Shankaran K, Desai HG. Helicobacter pylori in dental plaque of children and their family members. Journal of the Association of Physicians of India. 1994 Sep; 42(9): 719, 721 Language: Eng.Type: Journal Article Abstract: A prospective study was undertaken to determine the presence of Helicobacter pylori in the dental plaque of children and their family members. 22 children (age range: 2-12 years; males: 16) admitted to the pediatric ward for various disorders and 17 healthy family members (age range: 7-40 years; males: 9) of 13 of these children were screened for presence of Helicobacter pylori in the dental plaque by the rapid urease test. H. pylori were detected in dental plaque of 82% (18/22) children and 88% (15/17) of family members.In 85% (28/33) of the positive cases the rapid urease test was positive within 1 hour. Our observations indicate that Helicobacter pylori are present in the dental plaque of majority of children and their family members. Source URI: http://w ww. japi. org URI: http://imsear. hellis. org/handle/123456789/95238 MeSH: * Child * Child, Preschool * Dental Plaque –microbiology * Family Health * Female * Helicobacter pylori –isolation & purification * Humans * Male * Prospective Studies Appears in Collections: Journal of the Association of Physicians of India [10](http://imsear. ellis. org/handle/123456789/95238) Conclusion The author covered morphological characteristics, taxonomic information, biochemical/metabolic characteristics, chemotherapeutic methods of control/treatment/eradication, immunological responses, pathological information, and epidemiology in this paper. The overwhelming conclusion is that it is critical to survival of the human race that hygiene and education will be the best possible steps to overcome an increasing body of bacteria in our world. References 1. From Wikipedia, the free encyclopedia 2. http://www. gastro. theclinics. om/article/S0889-8553(05)70135-7/abstract) 3. http://www. heli co. com/? q=TreatmentForHelicobacterPylori 4. http://www. medscape. com/viewarticle/525100_2 5. http://www. ncbi. nlm. nih. gov/pubmed/17382275 6. Stated by D. J. Kelly, 2004. The University of Sheffield 7. http://emedicine. medscape. com/article/176938-overview#a0199 8. Centers for disease and control prevention 9. http://imsear. hellis. org/handle/123456789/116058Stomach Neoplasms –microbiology 10. http://imsear. hellis. org/handle/123456789/95238 11. http://bmb. oxfordjournals. org/content/54/1/17. full. pdf