Thursday, August 15, 2019

Clothes In Latin America Essay

Clothes in Chile and general Latin America Clothing styles throughout Latin America vary from region to region and have been influenced through several different sources. Fashion in Latin America today and traditional fashions of Latin America differ dramatically. Climate, location, isolation, population, economy, history, colonial influences are many of the sources that have helped to contribute to these changes. Traditional Latin American fashion varied form region to region but maintained a distinctive appearance. Traditional and new aged Latino fashions are generally easy to decipher from each other. Modern fashion in Chile and most of Latin American have lost their traditional roots and are similar to North American. It has become the norm to see a citizen of Chile walking the street in Gap or American eagle. The amount of traditional roots left in clothes largely depends on the location. Rural Latin American and Chile clothes are much more traditional than in the cities. Rural Chileans and Latin Americans who live in tropical climates prefer lightweight cotton clothing in general. Men usually wear lightweight cotton clothing and loose fitting cotton shirts. The majority of the woman dress in long skirts and blouses. In contrast, people who live in mountains or places of high elevation need heavier clothing for protection against the cold. Both men and woman alike wear ponchos or will simply use blankets with a slit for the head. Woman also dress in full skirts, long sleeved blouses, and shawls. Different lifestyles require different sorts of fashion. Farmers wear straw or felt hats to protect themselves form the sun. In the highlands men often wear coarse hand woven shirts and baggy pants. Rural people generally go barefoot or in sandals, and some even make shoes out of automobile tires. Despite modernized fashion Chileans and other Latin Americans, will dress more traditionally for special events or occasions. Chilean cowboys (Hausas) wear big flat-topped hats, heavy ponchos, colorful sashes, fringed leather leggings, and boost with spurs. This is a traditional outfit for Hausas in Chile. The clothing of the Araucarias Indian women of south-central Chile includes brightly colored shawls and heavy silver jewelry. Many Indian groups wear brightly colored clothing with traditional patterns. In such groups, each area/village has its own special designs and colors. Colonials played a large and important role in the alteration and adaptation of Latin American fashion. The cultures different styles of clothing mixed together and became more European/American as time went on. Over the years factories have bee built throughout Latin America and Chile, many of which produced clothes, influencing fashion further. Media greatly promoted the Americanization of clothes in the Hispanic culture as well. Different regions have held on to their native clothes styles better than others. Traditional clothing, however, can still be found in certain areas of Latin America today. Areas that are more isolated than others have a better chance of holding on to their traditional way of dress. Because these regions are isolated they have not been as colonized as other areas and are visited by outside locations less often. Even if a location isn t necessarily isolated the physical characteristics and weather can cause traditional dress to continue. Extreme heat of cold, high winds, and a rocky area of land are examples of factors that cause modernization to decrease. Clothes worn in Latin American countries today differ greatly from region to region. In Ecuador the Otovindions are well known for their distinctive weave pattern, bright colors, and sharp depiction of figures in their clothing. Clothes in Ecuador and many other Latin American countries are hand made to a larger extent than in America. Bolivia is very much in touch with their traditional roots in clothing today. Many men and boys wear brightly colored knitted caps with earflaps, which help to keep them warm in the highlands. Due to warm weather in certain areas of Bolivia many Bolivians wear lightweight fabric, especially lightweight cotton. Despite the changes in civilization the many native Bolivian Indians are able to maintain their traditional style of clothing and customs. The woman wear their hair in long pigtails with a soft derby hat on their heads. Bolivian women will wear an apron over a bright skirt with many underskirts, which are cool.

Wednesday, August 14, 2019

Organic Foods Pdf Essay

Abstract: During the last decade, consumers’ trust in food quality has decreased drastically, mainly because of growing ecological awareness and several food scandals (e. g. BSE, dioxins, bacterial contamination). It has been found that intensive conventional agriculture can introduce contaminants into the food chain. Consumers have started to look for safer and better controlled foods produced in more environmentally friendly, authentic and local systems. Organically produced foods are widely believed to satisfy the above demands, leading to lower environmental impacts and higher nutritive values. So far, studies have partly con? rmed this opinion. Organic crops contain fewer nitrates, nitrites and pesticide residues but, as a rule, more dry matter, vitamin C, phenolic compounds, essential amino acids and total sugars than conventional crops. Organic crops also contain statistically more mineral compounds and usually have better sensory and long-term storage qualities. However, there are also some negatives: plants cultivated in organic systems generally have 20% lower yields than conventionally produced crops. Several important problems need to be addressed in the coming years: environmental, bacterial and fungal contamination of organic crops and, the most essential issue, the impact of organic food consumption on animal and human health.  © 2007 Society of Chemical Industry Keywords: organic plant crops; quality; yield; composition; nutrition; vitamins; phenolics; sugars; nitrates; nitrites; pesticides; dry matter; health; sensory qualities. FACTORS INFLUENCING THE QUALITY OF ORGANIC PLANT FOOD PRODUCTS There are several important factors in?uencing the quality of food products that also are relevant to organically produced plant products. As illustrated in Fig. 1, the basic factors are the quality of the environment (abiotic factors) and the levels of pest and pathogen damage (biotic factors) to which plants are subjected. The main components of the environment (air, water, soil) have to be unpolluted if the crops obtained are expected to be of high nutritive quality. Many environmental contaminants enter the food production chain (soil–plant–animal–human organism), causing signi? cant problems in human health. 1 These contaminants include heavy metals, pesticide residues, nitrogen compounds, mycotoxins, chlorinated biphenyls (PCBs), aromatic hydrocarbons (e. g. benzo[a]pyrene), plant growth stimulators (e. g. choline chloride), antibiotics, hormones, radioactive isotopes and plastic substances (monomers). Climate and weather are also important factors, as well as soil type and pH, soil cultivation, fertilisation and conditions of crop storage after harvest. ? Biotic factors can have also a signi? cant impact on crop quality. The main biotic factors are cultivar choice, bacterial and fungal contamination (disease) and pest damage. Cultivars of the same crop species can differ signi? cantly in nutritive quality. For example, the content of ? carotene in carrots (Daucus carota L. ) can vary between 7. 19 and 13. 84 mg g? 1 depending on the cultivar. 2 The main potential source of bacterial contamination in plant crops is animal manure used in organic farming. Contamination can take place via the roots or by water splashing onto the leaf surfaces. The most important organisms are several species of facultative anaerobic bacteria (Salmonella enterica, Escherichia coli O157:H7, Campylobacter spp., Listeria monocytogenes, Clostridium botulinum, Mycobacterium paratuberculosis), protozoa (Toxoplasma gondii), tapeworms, viruses and prions. The results obtained so far are contradictory. Some studies indicate higher bacterial contamination in organic crops, while others show the opposite. 3 Mycotoxins (produced by fungi) originate mostly in the ? eld but can also develop during storage. Owing to the fact that fungicides are not used Correspondence to: Ewa Rembialkowska, Organic Foodstuffs Division, Faculty of Human Nutrition and Consumer Sciences, Warsaw Agricultural University, Nowoursynowska 159 C, PL-02-776 Warszawa, Poland E-mail: ewa rembialkowska@sggw. pl (Received 24 October 2006; revised version received 29 January 2007; accepted 8 February 2007). Figure 1. Factors in? uencing the quality of organic food products. in organic agriculture, some authors believe that organically produced foods will contain higher concentrations of mycotoxins. However, literature reviews show that mycotoxin concentrations are usually similar or reduced in organic compared with conventional products. 4 The most notorious mycotoxins are those produced by Fusarium species on cereal crops and maize. One of the reasons for lower Fusarium infections in organic grains could be the lower nitrogen concentrations in the tissues. 5 Insect pests also exert an in? uence on crop quality. Because of the ban on synthetic pesticides in organic agriculture, insects often damage fruits and vegetables, thereby diminishing their yield and harming their appearance. However, it is not clear whether they also reduce their nutritive quality. In contrast, there is evidence that organically grown plants contain more phytochemicals (which are natural insecticides) and are therefore more resistant to insect damage. 6 They can also play a positive role in human health, because several phytochemicals, being plant defence compounds, are connected with possible health bene? ts (Brandt K, oral presentation at QLIF Congress, Newcastle, 2005). Regulations on organic plant production allow actions that avoid many negative features of crop quality if they are consistently performed by producers. In order to ful? l these demands and to offer highquality products to consumers, an ef? cient and airtight certi? cation and control system must be implemented. In most countries such systems are quite ef?cient, though a rapid increase in the number of organic farms could lead to problems with a subsequent loosening of regulatory control. Therefore the main rule should be ‘trust is good, but control is better’. Moreover, the ? nal quality of organic food products is in? uenced by the effective implementation of 2758 the regulations on animal production and organic food processing. Only precise ful? lment of all these regulations can guarantee the best organic food quality (Fig. 1). IMPACT OF REGULATION ON ORGANIC PLANT PRODUCTION The regulations for organic plant production are clear and detailed. 7 The European Union (EU) regulation published in 19918 contains parts that relate directly to the composition of organic plant products. The most important aspects of this regulation include:7 †¢ a ban on genetic engineering and genetically modi? ed organisms (GMOs); †¢ lower nitrogen levels – a maximum limit for manure application of 170 kg N ha? 1 year? 1 ; †¢ a ban on synthetic pesticides; †¢ a ban on synthetic mineral fertilisers; †¢ a ban on growth promoters. Organic farmers must follow the above regulations if they want to pass the inspection procedure every year and receive a certi? cation document. If all requirements are complied with, several qualitative results can be expected. The most important conclusions from scienti? c comparisons are given below. CONTAMINANTS Nitrates and nitrites A large amount of data shows that the content of nitrates and nitrites is distinctly higher in conventionally cultivated than in organic crops. This is important, because nitrates can easily be converted into nitrites, which can cause a dangerous illness called methaemoglobinaemia in babies, infants and elderly people. 9 J Sci Food Agric 87:2757–2762 (2007) DOI: 10. 1002/jsfa Quality of organic plant products. Moreover, nitrites can react with amines to create nitrosamines, which are carcinogenic and mutagenic substances causing cancer of the digestive tract and leukaemia. 10 This process is dangerous not only for young children but also for adults of any age. Based on a large amount of data, the nitrate content of organic and conventional crops has been compared. On average, the nitrate content of organic crops was 49% that of conventional crops. 11 These and other data provide a basis for stating that organic methods lead to an approximately 50% reduction in the intake of nitrates and nitrites by humans. Pesticides Governments place legal limits, known as the Maximum Residue Level (MRL), on the level of pesticides that can be present in food. The MRL is usually estimated by testing individual pesticides on rats. Governments maintain that consumption of pesticides below the MRL is not a health risk. However, at lower levels, pesticides are known or suspected to cause many diseases and health problems, including cancer. 12 The main problem is that the MRL for pesticides is usually estimated by testing individual pesticides on rats for a relatively short period. Virtually nothing is known about the effects of consuming combinations of potentially hundreds of different pesticides over the course of a lifetime. We do not and cannot know explicitly what is causing what, so precaution is the main tool available to us (Howard V, oral presentation at QLIF Congress, Newcastle, 2005). The levels of pesticide residues found in organic crops are de? nitely lower than those present in conventional crops (Howard V, oral presentation at QLIF Congress, Newcastle, 2005). It can be expected that eating organic foods will result in lower pesticide levels in human milk and body tissues. There is some evidence con? rming this hypothesis. Researchers in France found that the level of pesticide residues in the milk of breast-feeding women decreased signi? cantly with an increase in the proportion of organic food in the daily diet (from 25 to 80%). 13 All available results show that the content of pesticide residues is signi? cantly lower in organic crops, which creates safer health conditions for consumers eating organically. Heavy metals Heavy metals such as cadmium, lead, arsenic, mercury and zinc are introduced into the food chain from various sources, including industry, transportation, communal wastes and agriculture. For example, mineral phosphoric fertilisers used in conventional agriculture can introduce cadmium into crops, but the metal industry and transportation also cause cadmium contamination of soils and crops. Therefore there are no clear results in studies comparing the levels of J Sci Food Agric 87:2757–2762 (2007) DOI: 10. 1002/jsfa heavy metals in organic and conventional crops. Some data point to higher levels in conventional crops, while others show the opposite. 11 A problem to be solved is whether organic farming (composting, increasing the organic matter in soil, pH, etc. ) can diminish the intake of heavy metals by cultivated plants. DESIRABLE COMPOUNDS IN PLANTS Vitamins, phenolic compounds and mineral compounds The nutritive value of foods depends mainly on them having the appropriate content of compounds indispensable for proper functioning of the human organism. The content of phyto-compounds in plant foods is a topic of great interest in food science nowadays. A growing body of evidence indicates that secondary plant metabolites (phytochemicals) play a critical role in human health and may be nutritionally important. 14 There are two main theories explaining the factors in? uencing the levels of compounds in plants. 15 The carbon/nitrogen (C/N) balance theory states that, when nitrogen is easily available, the plant will ? rst make compounds with high nitrogen content, e. g. proteins for growth and nitrogen-containing secondary metabolites such as alkaloids, glucosinolates and non-protein amino acids such as the Allium ? avour precursors. When nitrogen availability is limiting for growth, the metabolism changes more towards carboncontaining compounds, e. g. starch, cellulose and non-nitrogen-containing secondary metabolites such as phenolics and terpenoids. The second, newer theory is the growth/ differentiation balance hypothesis (GDBH). 15 It states that the plant will always assess the resources available to it and optimise its investment in processes directed towards growth or differentiation. The term ‘differentiation’ encompasseses increased formation of defence compounds as well as accelerated maturation and seed development. The C/N balance theory is a special and typical case of the GBDH theory, since low nitrogen availability is the most common growth-limiting condition in natural ecosystems. 15 To verify the above theories, several authors investigated the content of some vitamins and phyto-compounds in organically and conventionally produced crops. In order to summarise different data, for each organic–conventional comparison a % difference was calculated: [(organic ? conventional)/conventional] ? 100 The collected data for several desirable components are presented in Table 1. The role of vitamin C (ascorbic acid) in the human organism is basic for several metabolic functions, mainly because it is one of the major cellular direct antioxidants (along with glutathione) and is a 2759 E Rembialkowska Table 1. Contents of desirable components in organic crops relative to those in conventional crops Component Vitamin C Phenolic compounds Iron Magnesium Phosphorus Mean % difference +28. 7 +119. 3 +21. 1 +29. 3 +13. 6 Range (%) ? 38 to +135. 5 ? 56. 6 to +734. 2 ? 73 to +240 ? 35 to +1206 ? 44 to +240 Number of studies 21 15 16 17 18 production and reduces carbohydrate production. Moreover, the increased protein produced in response to high nitrogen levels contains lower amounts of certain essential amino acids such as lysine and therefore has a lower quality with respect to human nutrition. Source: Ref. 17 and author’s own calculations. cofactor for certain enzymes. Vitamin C also supports detoxication and resistance of the human organism. The higher content of vitamin C in organic crops is bene? cial to health, because vitamin C inhibits the in situ formation of carcinogenic nitrosamines, thus diminishing the negative impact of nitrates on the human organism. 10 Therefore organic vegetables can play an important anticarcinogenic role. Plant-based phenolic metabolites are particularly interesting because of their potential antioxidant activity and medical properties, including anticarcinogenic activity. 15 According to Benbrook,16 organic farming has elevated antioxidant levels in about 85% of the cases studied to date and, on average, levels are about 30% higher compared with foods grown conventionally. Mineral compounds containing iron, magnesium and phosphorus are fundamental for human health. According to Worthington,17 the higher mineral content in organic crops may be connected with the higher abundance of micro-organisms in organically managed soil. These micro-organisms produce many compounds that help plants to combine with soil minerals and make them more available to plant roots. Unfortunately, there have been only a few studies on other vitamins such as ? -carotene, B1 and B2 and the results are contradictory. Therefore no general conclusions can be drawn about these compounds. Total sugars A higher total sugar content in plant crops not only improves their taste but is also an important component of their technological quality, e. g. in the case of sugar beet. Studies clearly indicate a higher content of total sugars, mainly sucrose, in organically produced vegetables and fruits such as carrots, sugar beet, red beetroot, potatoes, spinach, Savoy cabbage, cherries, redcurrants and apples. 11,18 Proteins Several studies analysed in review papers11 show that the quantity of crude protein is lower in organic than in conventional crops but that the quality is better as measured by essential amino acid content. According to Worthington,17 nitrogen from any kind of fertiliser affects the quantity and quality of protein produced by plants. Provision of a large amount of nitrogen to a plant increases protein 2760 SENSORY QUALITY OF ORGANIC FOODS Many studies have proved quite unequivocally that vegetables and fruits from organic farms have a better taste and smell. This was found for carrots and potatoes, celery and red beetroot, head cabbage and tomatoes as well as for apples, cherries and redcurrants. 11 Organic fruits contained more total sugars, which probably in?uenced the better taste perception by consumers. Better taste and smell have also been found for bread made from organic grain, which also had better crumb elasticity. 6 Interesting studies have been conducted on animal food preference in which animals were given organic or conventional fodder. Most studies have proved a clear animal preference for foods produced organically; such studies have been conducted on rats, mice, hens and rabbits. 19 Preference for organic fodder was also observed in cases where, according to chemical analyses, both organic and conventional fodder ful? lled all physiological needs of the animals tested. 20 The reason for this was probably the difference in taste between organic and conventional fodder. STORAGE QUALITY OF ORGANIC PLANT CROPS Transpiration losses and decay processes, as well as changes in nutritive value, normally take place during the storage period of potatoes and other vegetables. However, these changes can proceed at different rates and to differing degrees. Most of the available data indicate that the decay process is slower in organic crops, which therefore show better storage quality after the winter period. A review study based on many sources21 concluded that the storage quality of vegetables and fruits was better in the case of plants grown on organic farms (Table 2). The better storage quality of organic crops Table 2. Storage losses of carrots, potatoes and various fruits and vegetables from organic (ORG) and conventional (CONV) farmsa Carrots Potatoes Fruits and vegetables ORG CONV ORG CONV ORG CONV Number of quoted studies Storage loss (% of initial mass) a 15 33 15 40 22 22 22 30 53 28 53 38 Average data based on literature review. 21 J Sci Food Agric 87:2757–2762 (2007) DOI: 10. 1002/jsfa Quality of organic plant products Table 3. Positive nutritive attributes of organic plant products No. 1 2 3 4 5 Attribute Organic crops contain fewer nitrates, nitrites and pesticide residues than conventional crops. There is no clear difference in the content of heavy metals between organic and conventional crops Organic plant products contain, as a rule, more dry matter, vitamin C, phenolic compounds, essential amino acids and total sugars. However, the level of ? -carotene is often higher in conventional plant products Organic plant products contain statistically more iron, magnesium and phosphorus. They also tend to contain more chromium, iodine, molybdenum, selenium, calcium, boron, manganese, copper, potassium, sodium, vanadium and zinc Organic plant products usually have better sensory quality. They have a clearer smell and taste and are sweeter and more compact because of their higher dry matter content Preference for organic products is typical not only for humans but also for animals such as rats, rabbits and hens. This preference was also observed in cases where, according to chemical analyses, both organic and conventional fodder ful? lled all physiological needs of the animals tested Vegetables and fruits from organic production maintain better quality during winter storage, showing lower mass losses due to transpiration, decay and decomposition processes. A possible reason for this is their higher content of dry matter, minerals, sugars and other bioactive compounds 6 Table 4. Negative and unclear aspects of organic plant products No. 1 Negative aspect Plants cultivated in organic systems have, as a rule, signi?cantly (on average 20%) lower yields than conventionally produced crops. This increases their price and creates for many consumers a barrier to buying organic foods Unclear aspect Environmental contamination (heavy metals, PCBs, dioxins, aromatic hydrocarbons) can be similar in organic and conventional crops, because the impact of industrial, transport and communal sources is similar on organic and conventional farms located in the same area Bacterial (mainly Salmonella and Campylobacter) Contamination can sometimes be higher in organic produce, but scienti?c evidence of this is still not clear Mycotoxins can contaminate both organic and conventional foods, but scienti? c data are contradictory The impact of organic food consumption on human health and wellbeing remains essentially unknown in spite of some positive indications, so the subject needs further study 2 3 4 was probably associated with a higher content of dry matter in their ? esh, resulting in less extensive decay and decomposition. Lower losses in organic production have not only nutritive but also economic bene? ts. In conventional systems, high yields are produced but signi?cant losses during storage reduce the economic bene? ts. CONCLUSIONS Recent food crises (BSE, foot and mouth disease, food contamination by dioxins, toxic fungi, Salmonella and Campylobacter bacteria) have caused consumers to look for more authentic and safer foods. Organic food production is widely recognised as being more friendly to the environment, more controlled and better for animal welfare. On the other hand, many data indicate that a lot of food contaminants have their source in conventional methods of agriculture, animal production and food processing. The negative effect of the continuing enthusiastic use of chemical fertilisers and pesticides in agriculture is potentially huge. Therefore safer methods of agricultural production, mostly organic methods, are very important. Studies conducted in various countries have indicated several positive attributes of organic plant J Sci Food Agric 87:2757–2762 (2007) DOI: 10. 1002/jsfa products (Table 3) but also a few negative and unclear aspects (Table 4). To summarise the positives, organic food should be recommended for all, but especially for young babies, pregnant and breast-feeding women, elderly and chronically ill people and vegetarians. The last group obviously consumes a lot of vegetables, which can contain too high levels of carcinogenic substances when produced conventionally. The lower content of nitrates and higher content of phenolic compounds and vitamin C in organic crops are especially important for health. Nitrates are easily converted in the digestive tract into poisonous nitrites, which are the precursors of carcinogenic nitrosamines. This process is hampered by vitamin C, and carcinogenesis is retarded by phenolic compounds and other dietary phytochemicals present at higher levels in organically produced crops. Therefore organic vegetables can play an important anticarcinogenic role. REFERENCES 1 Rembialkowska E, Organic agriculture and food quality, in Ecological Agriculture and Rural Development in Central and Eastern European Countries, Vol. 44 of NATO Science Series, ed. by Filho WL. IOS Press, Amsterdam, pp. 185–204 (2004). 2761 E Rembialkowska ? ? 2 Schuphan W, Biochemische Sortenprufung an Gartenmohren ? ? als neuzeitliche Grundlage fur planvolle Zuchtungsarbeit. Z? chter 2:25–43 (1942). U 3 Franz E, van Bruggen AHC and Semenov AM, Risk-analysis of human pathogen spread in the vegetable industry: a comparison between organic and conventional production chains, in Bayesian Statistics and Quality Modelling in the AgroFood Production Chain, ed. by van Boekel MAJS, Stein A and van Bruggen AHC. Kluwer Academic, Dordrecht, pp. 81–94 (2004). 4 FAO, Food Safety as Affected by Organic Farming (Twentysecond FAO Regional Conference for Europe). [Online]. (2000). Available: www. fao. org/docrep/meeting/x4983. htm. 5 Van Bruggen AHC and Termorshuizen AJ, Integrated approaches to root disease management in organic farming systems. Aust Plant Pathol 32:141–156 (2003). 6 Bjorn G and Fruekilde AM, Cepa onions (Allium cepa L) grown conventionally and organically – similarities and differences. Gron Viden 153:1–6 (2003). (in Danish). 7 Hansen B, Alroe HF, Kristensen ES and Wier M, Assessment of food safety in organic farming. DARCOF Working Paper 52 (2002). 8 EU, Council Regulation No. 2092/91 of 24 June 1991 on organic production of agricultural products and indications referring thereto on agricultural products and foodstuffs. OJL 198, 22. 7 P. 1 (1991). ? 9 Szponar L and Kierzkowska E, Azotany i azotyny w srodowisku oraz ich wplyw na zdrowie czlowieka. Post Hig Med Do? w s 44:327–350 (1990). 10 Mirvish SS, Vitamin C inhibition of N-nitroso compounds formation. Am J Clin Nutr 57:598–599 (1993). 11 Rembialkowska E, Wholesomeness and Sensory Quality of Potatoes and Selected Vegetables from the Organic Farms. Fundacja ? Rozwoj SGGW, Warszawa (2000). 12 BMA, The BMA Guide to Pesticides, Chemicals and Health. Report of Science and Education. British Medical Association, London (1992). 13 Aubert C, Pollution du lait maternel, une enquete de terre vivante. Quatre Saisons Jardinage 42:33–39 (1987). 14 Lundeg? rdh B and M?rtensson A, Organically produced plant a a foods – evidence of health bene? ts. Acta Agric Scand B 53:3–15 (2003). 15 Brandt K and Molgaard JP, Organic agriculture: does it enhance or reduce the nutritional value of plant foods? J Sci Food Agric 81:924–931 (2001). 16 Benbrook CM, Elevating Antioxidant Levels in Food through Organic Farming and Food Processing. An Organic Center of Science Review. Organic Center for Education and Promotion (2005). 17 Worthington V, Nutritional quality of organic versus conventional fruits, vegetables, and grains. J Alternative Compl Med 7:161–173 (2001). 18 Zadoks JC, Development of Farming Systems. Pudoc, Wageningen (1989). 19 Williams CM, Nutritional quality of organic food: shades of grey or shades of green? Proc Nutr Soc 61:19–24 (2002). ? 20 Woese K, Lange D, Boess Ch and Bogl KW, A comparison of organically and conventionally grown foods – results of a review of the relevant literature. J Sci Food Agric 74:281–293 (1997). 21 Bulling W, Qualit? tsvergleich von ‘biologisch’ und ‘konventionell’ a erzeugten Feldfruchten. Regierungsprasidium, Stuttgart (1987). 2762 J Sci Food Agric 87:2757–2762 (2007) DOI: 10. 1002/jsfa.

Tuesday, August 13, 2019

Analyisis of Yell Group PLC Essay Example | Topics and Well Written Essays - 2500 words - 1

Analyisis of Yell Group PLC - Essay Example range of media like printed directories, local and national newspapers, and online directories and also provides business and residential information on phone. The main areas of operation of the group are United Kingdom and United States of America. (Company Overview, Worldscope) In the year 2006, the company posted a total sales figure of â‚ ¤1621.30 million. The operating income was â‚ ¤449.30 million, and the net income was â‚ ¤212.30 million. The total assets of the company in 2006 amounted to â‚ ¤3592.60 million as against the total liabilities of â‚ ¤2486.80million. The EBITDA is â‚ ¤493.90million. The key fundamentals of the company the company are given as under: The sales of the company increased from 670.51 million pounds in 2002 to 1285.30 million pounds in 2005. From 2002 to 2003 there was a 66.14% increase in sales. This increase in sales stabilized to 6.54% in 2004 and then increased to 8.29% in 2005. From 2002 to 2005 the cost of goods sold increased from 226.10 million pounds to 470.70 million pounds. The first year saw an increase of about 72.05%. This increase also stabilized to 11.39% in 2004 and 8.63% in 2005. The cost of goods sold from 2002 to 2500 decreased consistently, while the rate of increase in sales dipped to 6.54% from a high of 66.14% in 2003. The gross income and the operating income have also increased consistently from 2003 onwards. The increases were the highest from 2002 to 2003, and all the increases were over 50% in all the above measures. At the same time, the company has been trying to reduce its general, admin, selling expenses and other expenses. These expenses were again very high from 2002 to 2003, but ha ve steadily decreased since then. The earnings before interest and taxes increased by 59.46% in 2003 and decreased at the rate of 49.30% in 2004. It again showed a phenomenal increase of 161.15% in 2005. This trend of decrease and then increase was a result of an increase in the pretax extraordinary charge at the data 64.12%

Document from the Women's Liberation Movement Essay

Document from the Women's Liberation Movement - Essay Example Rather than fall all over herself to appear charming and attractive to a member of the other sex, a woman will do well to just be herself and cease pretending to be something she is not. And if men feel threatened and turn on the truly liberated woman en masse, such men are simply not worth the ground she walks on. This document is particularly important in a world where women are oppressed under the burgeoning pressures of sexual freedom. This document focuses on Lesbian-feminist politics, as heralding the end of a male- dominated society. It denounces heterosexuality on the grounds that it perpetuates the oppression of women as it is essentially male-centered. According to Bunch, lesbianism is a political choice which entails protecting the rights of women. She emphasizes the need for lesbians to become feminists and vice-versa in order to destroy the fabric of a male-dominated society that is cruel to women in the extreme. Sexism propagated by men drunk with power is an evil that needs to be dealt with an iron fist. Heterosexuality undermines and eventually sunders the bonds of sisterhood; therefore lesbianism is the true threat to male supremacy. This document explores the nuances of lesbianism as it were and as it is.

Monday, August 12, 2019

Describe the function of tolc gene in salmonella and how this function Essay

Describe the function of tolc gene in salmonella and how this function may relate to intracellular pathogenisis in this organism - Essay Example Other substances that are secreted by TolC gene include macrobiotic solvents, and a number of antiseptic peptides (Tegos and Mylonakis, 2012). TolC functions hand in hand with other internal casing mediums in a bid to expunge unwanted elements. Research done over the recent past have posited that a number of mechanisms accountable for dissipating noxious substances from the E. coli cell requires the presence of TolC in order to function properly (Yu, Zhang and Brown, 2013). This function directly relates to the intracellular pathogenesis in salmonella. According to Toone, (2011), the absence of TolC in salmonella as a result of its removal elevates the level of defencelessness or vulnerability of salmonella to the various agents that exterminates or eradicates bacteria, viruses, and other germs, and also chemical composites. It is however important to elucidate the fact that in salmonella, TolC relies on other mechanisms for accountable for the removal of noxious substances from the cells. According to Horiyama, Yamagichi and Nishino (2010), these other mechanisms include "AcrAB, AcrD, AcrEF, MdtABC, MdsAB, EmrAB, and MdfA, MacAB, and MdtK" (p. 1372). In a nutshell, the function of the TolC gene in salmonella is aiding in the secretion of noxious substances from the cells of

Sunday, August 11, 2019

Write a short essay on Information System (IS) development

Write a short on Information System (IS) development philosophies and methodologies - Essay Example thodology a hierarchical categorization is required that detaches basic or â€Å"essential† characteristic from â€Å"accidental† particulars (Avison & Fitzgerald, 2002; Iivari et al., 1999). This paper presents a detailed analysis of the information system development philosophies and methodologies. Information systems development methodology is simply an instantiation that is established for one or more information systems development approaches (ISDAs). In addition, the information systems development approaches encompass the necessary features; those are then inherited for the information systems development methodologies belonging to that class. Additionally, one significant implication of systematizing the area of information systems development methodologies into an understandable amount of ISDAs is to move the influence from individual ISDMs to the characteristics of all-purpose information systems development methodologies, like terms of essence of their illustration methodology. Furthermore, the strong appearances of information systems development methodologies make it probable to widen the practical experience of systems developers. Since, they allow flexible, situation-oriented â€Å"methodology engineering† thus an information systems development methodology is adopted to a specific ISD project in the course of an instantiation of a suitable information systems development methodology (Iivari et al., 1999; Bielkowicz et al., 2002). Socio-Technical Approach is a technique for information system development that facilitates future users to play a major role in the system designing, to fulfill requirements, additional technical and operational objectives, to make sure that the new technical system is enclosed with a well-matched and well-functioning business system (Fitzgerald et al., 1985; Walters et al., 1994). Socio-Technical Approach encompasses the guiding principles and beliefs that are about the self-design of a working system. In addition, the

Saturday, August 10, 2019

Roman Life Essay Example | Topics and Well Written Essays - 500 words

Roman Life - Essay Example Rediscoveries and excavations of the sites directly affected by the long catastrophe had sparked interest among the historians of the 16th century to obtain further insights and reveal the type of culture and life at the city under Roman empire. Archeological efforts that pieced together fragments of stones and layers upon layers of sediments alluded how fertile Vesuvius slopes were in ancient times that grapes and olive groves thrived along the good climate of the mountain surface which most wealthy Romans took advantage of in their lavish way of living (Pompeii). Indication of wine shops emerged as well in Herculaneum when buried artifacts unraveled distinct carvings of grapes, for instance, on jars and pots in the similar manner that bread and goat designs gave hints on the age-old containers which were intended for livelihood through milking and baking (Pompeii). Along with the frescoes found near the ruins, certain evidences showed that Pompeiis control water tower adapted a flow system that was lain out such that it set priority according to the order of society which had been a well-established truth in the Roman communities of that period. More to class divisions and means of food storage, excavating into the buried city produced other rich findings typically with the cast retrievals by Fiorelli method of furniture forms the way Pompeii civilization managed its unique architecture. Fallen or completely devastated structures also turned up landscape attitudes during the final moments as the inhabitants made horrifying attempts at avoiding the noxious fumes. In particular, the cast shapes enabled understanding of the amount of sufferings and the measure of sacrifice and courageous response to such terrible condition from which to draw inferences on philosophies by which early Romans lived in every aspect that was later to reflect in the customary gesture, practices, and set of values for the descendants to imbibe at depth down the history line