Change Speech -Kite Runner, Poem, Article Essay Example for Free

Change Speech -Kite Runner, Poem, Article Essay One can perceive change within themselves in various ways and through various mediums. Today I stand before you, ladies and gentleman to discuss with you three significant Changing Self texts I believe, strongly connect in their own ways with the Representations of Changing Self expo. Change can be an immediate process or it can be a series of events over a prolonged period of time like it is in Hosseini’s novel The Kite Runner, published in 2003. However, using different texts The Kite Runner and perhaps a poem, like The Door, by Miroslar Holub for example, can represent change of self not only in a different format, but also connecting ideas that change can be triggered by a certain event or experience in history which can leave a lasting impact on the present and future. At times we need to be coached or pushed into change, however in other instances we are called to embrace the opportunity as it arises. Sometimes we come across change unknowingly, by innocence or fear of circumstances as of a true story of an Indian boy named Saroo who unknowingly was driven through the process of change. Changing Self can be a very difficult process to acknowledge and to accept. This idea is significant in The Kite Runner; a ‘deeply moving’ novel demonstrates how a horrific experience of one unforeseen event can change the present and future of a young life. Amir slowly develops realisation with age that another change is required to bring about a new beginning or ‘a way to be good again’, as Rahim Khan said presented as a ‘one time’ opportunity . As discussed in the beginning of the novel we are revealed with a component of the past which reflects the choice of future Amir is faced with. The result of Amir’s dreadful experience of watching his servant friend, or not-so-much friend, Hassan being raped and the fact that he didn’t do anything about it, or step in and fight Asef before any commotion began fills Amir with unsound guilt and remorse which he proved unable to hide away from, ‘it was my past of untatoned sins† as quoted. This guilt is too powerful for him to acknowledge, so much so that he takes the course of trying to change the way things ran around his home, by getting rid of Hassan from his life. Amir runs away, metaphorically and literally from the environment and surrounds in hope to seek a better mind and reality. Using the literal ‘running’ from Afghanistan to America to seek safety, he does this metaphorically as he tries to run away from the guilt he cannot let go of. The symbolic use of the cleft lip is a significant detail in the novel used to classify that a person can be identified through specific events and choices, positive or negative. By this whereas Hassan had a cleft lip as a child, this same scenario is changed around as Amir embraces the opportunity to ‘become good again’ and save Sohrab, Hassan’s son, and Amir’s own nephew, from Asef. Amir changes his old cowardice to courage, stepping fourth to fight a losing battle with Asef, a noted, ‘cathartic’ experience, relieving himself from pain, with pain from the blows of Asef, leaving Amir with a cleft lip also. Only to be saved by Sohrab with the repeated symbolic use of the slingshot, this was also used to save Amir from Asef by Hassan years before. Amir feels as though he has positively changed for the better by embracing opportunity and new attribute of courage, filling in the gaps of his stained past. Changing self may be presented as a door of opportunity or experience we may be called to open. The Door, an influential, yet daring poem by Miroslar Holub emphasises in an imperative tone of urgency and pushiness that any change is better than no change at all. Therefore, one must embrace any change as the opportunity presents itself. The symbol of the door is an indicator of opportunities, and the need for them to be open, just as Rahim Khan was a door of opportunity for Amir to open and experience the ‘drought’ or movement of change willing to take place, good or bad. The words, ‘if there is a fog, it will clear’ demonstrates how this presented opportunity for Amir to relieve his life of guilt with be finally removed with action of ‘opening the door.’ The repetition of ‘go and open the door’ is not only encouraging but coaching and emphasising that if all doors are opened and even if so many are negative, there will still be a positive movement because the door was opened and ‘at least there will be a draught,’ or rather, at least you will have tried to do something about an awful event or experience with an unseen future and not remain in the same position, dealing with the guilt and regret, which cannot escape. As long as the door remains shut, the air will remain stuffy and uncomfortable to breathe in, so coming fourth and opening the door will let fresh air and new opportunities to evolve. The writer explains the positives of change which is used to entice or urge the reader to want to experience a new change of air. Changing circumstances in one’s life can erratically change and impact one’s life within a series of events contained by a short span of time. This concept is represented in the deeply touching true story of an Indian boy, named Saroo which was published in the Sydney Morning Herald back in March this year. Throughout 25 years, young Saroo went through an array of unforseen events which lead him away from lifelong poverty and his mother to where he is today, amongst the rich living in Australia. Just as the Herald Sun writes, ‘Australia’s very own, slum dog millionaire!’ Why was this so? Many say it occurred because of fate. When Saroo, whom at the time was only five years old- awoke alone and very frightened at one of India’s very many train stations very late in the evening after he had fallen asleep waiting for h is brother to return. At this part of Saroo’s life, he had very little and was uneducated. Was it fear or was it God or a mixture of the both who persuaded young Saroo to pursue looking for his brother in the closest train simply because, ‘he might be in there.’ This simple child’s thought shunted and altered his life away from anything he ever knew one unforseen event, encouraged by fear, taking the opportunity to open the doors which lead to a train, almost leaving to go to Australia. The Sydney Morning Herald describes this event as ‘the night his young life’s course was altered forever.’ This change of self is represented by the innocence of a young boy. This concept is characterised by Saroo explaining how the reality of trying to get home became a dead end, just like, all the trains he road, to try and reach home, only to meet with another dead end. Various aspects of Saroo’s life were in fact ‘dead ends’ but when it came to his life depending on it, just as Amir depended on the opportunity from Rahim Khan, as unforseen at the time as it was both boys embraced their opportunities to find something, whether a brother or second chance. They opened the door. Saroo’s door opened eventually to a family from Australia whom adopted him, suddenly and strangely out of his life course, he landed himself in Hobart. In conclusion, we can gather that changing self can be a difficult process, yet also an unforseen process which may take place over a series of events. These three researched texts have shown connecting and similar views that we must make use of experience and opportunity of change as it arises. Through these views, we are challenged that ultimately it is up to ourselves via thoughts or actions or a mixture of both to decide the course of change we are willing to take. In the Kite Runner, it is up to Amir to choose to put himself in danger to make up for his guilty past, The Door commands us to take opportunities, and yet in the Sydney Morning Herald’s feature Story illustrates that with physical experience change is forever impacting. Each of these demonstrates in their own way how change can somewhat be forced upon a person and ultimately deliver them into a new direction.

Impact of Overpopulation in India

Impact of Overpopulation in India REFLECTIVE 1 IMPACT OF OVERPOPULATION IN INDIA Executive summary: On the conceptual note evaluation of overpopulation is highly straight forward. Groups usually rely over the local geographical area for their nourishment and in cases if the productivity does not meet the demands placed by the group it naturally results in migration of the group towards a productive location. Sustainability could be explored as the ration between the totalities of the demands placed by the group to that of the ability of the geographical location to serve the demands. The following assessment would involve the assessment of overpopulation as an attribute stimulating opportunities and multiplying resistance for India’s growth and development. The 2oth century is a memorable timeline of population growth across the globe with the figures of inhabitants multiplying by 100% from that of 3 billion to 6 billion in just a span of 40 years. During this growth India has not gone exceptional in witnessing a rapid growth where it raised its population bars from 448 million to a whopping sum of 1.04 billion which has now reached 1.21 billion (Chakraborti, 2010). The following picture offers more insight over the state of rapid development that India is witnessing in contrast to the growth of world’s population (Chakraborti, 2010). Global population across the globe has been multiplying at a rate of 2% per annum and currently the growth trends in India is reflecting a rate of 1.4% there by surpassing the 0.7% rate of China’s population (Chandrasekhar, 2011) Changes in Demographics and economic growth / Health attributes in India: In the past decades there have been 2 crucial breakthroughs that India has faced as a result of overpopulation. One is linked with that of the changing structure of age due to population and the other is the link of overpopulation over the state of population’s health (Mitra, 2009). Changes in age structure of the population in India has significant effects on the economic growth of the nation and this has been driven by the increasing proportions of baby boomers that was able to create echo effects (Srinivasan, 2011). In the past the whole Indian economy was reliant on the development of the youth which has now taken a transition to a positive note of its demographic profile, which has been stimulating the economic growth. India’s population health has been a crucial driving force under its economic development where in the healthier workforce in India was aiding the productivity of individuals and good health in turn multiplied the state of attendance in schools and institutions leading to enhanced education in India (Srinivasan, 2011). The growing population of India has been witnessing a strong decline across the infant mortality rates by about 70% in the past 60 years (Vignath, 2010). The number of deaths per 1000 people from 165 has now gone down to 50 today thanks to the increasing state of medical infrastructure that has been able to address mortality issues in India amidst the increasing rate of population. On the other hand the state of child mortality has also seen a positive transition with the number of deaths per 1000 children declining from 138 to that of 75 today (Chandrasekhar, 2011). The state of life expectancy in India has thus multiplied at a rate of 5 per each decade and the state of fertility rate has also seen a downfall from 6 children to that of women towards 2.5 per women (Vignath, 2010). Source: (Mitra, 2009) The increasing age group of women under the reproductive age has been a driving force behind the increase in India’s population from 1.2 billion towards a strong projection of 1.6 billion by 2050. Amidst these the impact of overpopulation on the economic growth has been positive as the decreasing rates of crude births and death rates being a driving force (Mitra, 2009). Source: (Chakraborti, 2010) India is turning more urbanized and it is evident from the totality of the people living in urban areas witnessed a growth of 18% during 1960 to that of 30% in 2008. During this lengthy timeline majority of the deaths 53% were influenced by the multiplication of chronic diseases and which are later influenced down by the decline that the country faced across reduced tobacco consumption, increased nutrition and a shift towards a sedentary lifestyle (Sharma, 2011). Environmental Impacts: Trends in poverty: Environmental degradation in India is highly influenced by the extensive growth of its population which has been making adverse effects on the environment and natural resources. Majority of the poor people India lived across the rural areas with agriculture as their primary profession. There was abundance of programs that the government initiated under the anti-poverty and employment development aspects which was able to help the reduction of poverty ratios in the country. The growth of population aided the reduction of poverty rates in India where the nation had more than 55% of the population under the poverty line during 1974 and has shrinked down to 26% during 2000 (let, 2009). On the numerical count the population of people under poverty reduced from 320 million during 1975 to that of 260 million during 2000 (let, 2009). Amidst the reduction in the poverty rates in India considerable amount of impact was realized in the environmental degradation where in people who were not able to meet their basic needs were completely forced to make use of the natural resource that are under the common property resources (Mitra, 2009). Hence India was faced with severe exploitation of the natural resources and the excess pressure from the increasing population has influenced the degradation of the ground water. On the other hand the increased state of poverty in India has influenced the day to day activities of the poor to make use of the ponds and the rivers to contaminate and exhaust for their day to day activities. The outcome of such interventions has resulted in poor state of health for people who make use of the untreated water contents (Chandrasekhar, 2011). Both poverty as well as the increasing rate of population has been influencing the environmental challenges across India. Even though the positive signs of population growth have aided the growth of India’s economy in reducing Unemployment there exists abundance of environmental issues in India (Srinivasan, 2011). Pressure exerted On Land: Out of all the nations in the globe India’s is exposed to huge volume of pressure in its agricultural land as a result of increasing population (Sharma, 2011). India’s geographical volume of 43% is contributing to the agriculture and the changing demographics have in turn influenced the changing patterns of land utilization. It is evident that the totality of India’s population has witnessed a growth of 3 times of the volume from 1950 to 2010 but these growth has been accompanied only by a low growth rate in total area of land for cultivation(20.7% 118 million hectares in 2010 from that of 142 million hectare during 1960) (Mitra, 2009). Majority of the growth in this regard has taken place as a result of the depletion of forest as well as graze lands. Increasing rate of land acquisition by the population of India is yet another critical issue of over population. On the purpose housing, building manufacturing units and industries the acquisition of land has witnes sed a huge rise of about 10.5 million hectares in a span of 10 years (1990 – 2000) (Mukhopadhyay, 2012). Contrarily the increasing volume of agricultural extensfication is favouring the dominance of fertilizers which has resulted in water pollution (Vignath, 2010). Some of the worst outcome of agricultural extensfication is the negative impact that it creates over the state of bio diversity and poor state of health in oceans (Sharma, 2011). Degradation of both the land and soil is yet another important outcome of the increasing state of Population in India. The dominance of agricultural interventions and irrigation activities has increased the volume of water logging and most importantly the salination of the soil. The total geographical area of India is near to a volume of 330 million hectares of which about 175 million hectares are under the land degradation with both water and wind erosion topping the list of charts for about 150million hectares (Ranade, 2011). The outcome of soil erosion in India has resulted in increasing number of landslides, deforestation, and floods respectively. The current state of increasing population in India is highly degrading the scope for promoting enhanced food security and sustainability in the forestry context (Ranade, 2011). Declining rates of per Capita in the forest and agriculture land: Increasing population growth trend in India has resulted in declining rates of the per capital availability of forest and agricultural lands. It is evident that the current per capita of forests in india is much lower than the average of the entire worlds per capita (Mukhopadhyay, 2012). Year Per capita availability of Forest Land Per capita availability of agricultural Land 1950 0.112 0.628 1960 0.125 0.501 1970 0.114 0.401 1980 0.098 0.354 1990 0.080 0.322 2000 0.071 0.276 2010 0.065 0.240 Source: (Mukhopadhyay, 2012) Despite the increasing number of intervention being imposed by the government of India to address the declining per capita the increasing state of population has been hindering the ability of accomplishing objectives of gaining high per capita availability (Vignath, 2010). Destruction of the habitat and lessening bio diversity: Bio diversity has increasing value across the state of development in food, agriculture and medicine in India. But increasing population trends has influenced the destruction of Bio diversity in a positive manner; currently India is facing a threat of losing the habitats permanently. The increasing population trends have been increasing the human settlements and modernization of the agriculture is imposing negative impact on the local crops (Srinivasan, 2011). The current population trend in India is capable of offering a threat to more than 1000 animal species and sub species and a sum of 25,000 plants are under threat of losing their identity due to human acquisitions (Vignath, 2010). Patterns of consumption: The economic and industrial development is underlying the rapid changes happening the patterns of consumption; it is evident that India’s strong economic growth has been reflecting in the increasing sales of the motor vehicles (Sharma, 2011). This has naturally resulted in noise pollution, air pollution, traffic jams and has depleted the agricultural lands for building more connectivity of roads. The following table offers insight in to the increasing number of motor vehicle resignation which is an outcome of the increasing population trends in India. It is evident that majority of the growth patterns in the motor vehicle registration has reflected the consumption across metropolitan cities (Vignath, 2010). During 2000 the total population in India was near to 1 billion and at that stage for every 1000 people there were 9 motor vehicles getting registered and it is projected that the population of India is projected to increase to 1.4 Billion which will make the statistics to increase as 44 vehicles for every 1000 people (Mitra, 2009). Thus the projections strongly emphasize the multiplying number of environmental issues as a result of the increase in the motor sales which ultimately results in accumulation of garbage, sanitation and poor housing issues. Increasing level of consumption with reference to the gas, oil and petroleum has also been depleting the non-renewable resources in India (let, 2009). Raising demand for energy is yet another crucial issue that India has been facing in the recent past with the production of petroleum related products witnessing a multiplication of 29 times of the actual volume from 2010. Air pollution: India has topped the list of world’s most air polluted nations and the growth of industries, households, transportation has been witnessing exceeding limits than that of proposed by the World health organization. Increase in Illness as well as pre mature deaths are blamed for the increasing number of air pollution in India as a result of over population (Sharma, 2011). Conclusion: The totality of damage caused for India through air pollution has crossed $ 1.3 billion every year and on the other hand the degradation of the water has multiplied the health cost to $ 5.7 million on yearly basis for India (Mukhopadhyay, 2012). It is evident from the analysis that over population has been favoring the state of economic scenario for India with increasing employment and purchasing power but has extensive negative impact over the environment and natural resource management. REFERENCES Chakraborti, D. (2010). The Greying of India: Population Ageing in the Context of Asia (Sixth Edition ed.). SAGE Publications. Chandrasekhar, S. (2011). Indias Population: Fact and Policy (Second Edition ed.). John Day Company. let, J. (2009). Infant Mortality, Population Growth An Essay on Population Problems and International Tensions (Tenth Edition ed.). Routledge. Mitra, A. (2009). Indias Population: Aspects of Quality and Control (Ninth Edition ed.). Abhinav Publications. Mukhopadhyay, K. (2012). Control of Population Growth in India: Statistical Review of Information (Third Edition ed.). Daya Books. Ranade, S. (2011). Population Dynamics in India (Second Edition ed.). APH Publishing. Sharma, K. (2011). Demography and Population Problems (Ninth Edition ed.). Atlantic Publishers. Srinivasan, K. (2011). Regulating reproduction in Indias population: Regulating reproduction in Indias population: (Second Edition ed.). Sage Publications. Vignath, P. (2010). Indias Population: A Study Through Extension of Stable Population Techniques (Fourth Edition ed.). Sterling Publishers.

The multiple emulsions

The multiple emulsions Introduction: Seifriz started his pioneering work about multiple emulsions since 1925, which is regarded as the fundamental knowledge in the later research. Multiple emulsions are complicated systems which are considered as emulsions of emulsions (Garti, 1996).In the outer continues phase, the droplets of the dispersed phase named as globules which contain even smaller dispersed droplets ,the globules are separated from each other in external continues phase by a layer of oil phase film. In the inner phase, the droplets are departed from each other by oil phase (Benichou et al. 2006). It is widely believed that there exist two primary types of multiple emulsions, one is water-in-oil-in-water (W1/O/W2) emulsions that an w/o emulsion is dispersed in another aqueous phase (W2) and the other is oil-in-water-in-oil (O1/W/O2) emulsions that an o/w emulsion is dispersed in another oil phase(O2). In the previous study, water-in-oil-in-water (W1/O/W2) multiple emulsions have accounted for a vital role in t he research of multiple emulsions , because the applications of W1/O/W2 multiple emulsions plays an important role in the food industry and it is also easier for us to select various of hydrophilic emulsifiers which are safe to health as stabilizers in preparation of multiple emulsions (Pays et al., 2002). As shown in Fig. 1, take water-in-oil-in-water (W1/O/W2) double emulsions as an example, which are composed of three distinct phases : an internal aqueous phase (W1), which containing many aqueous soluble ingredients. Various internal aqueous droplets are encapsulated in an oil phase (O), which is included in external aqueous phase (W2) (Garti, 1996). Applications of multiple emulsions It is widely believed that the potential applications so numerous that the research in such promising area can bring beneficial effects, especially in products areas ,such as drug-delivery systems, cosmetics, and foods . Water-in-oil-in-water (W1/O/W2) emulsions allow the encapsulation of active ingredients which have the ability to be soluble in the internal aqueous phase, thus it is possible to hide smell of some matter; remove toxic substance; or select appropriate conditions to realize controlled release of the active ingredients under certain process of emulsification. (Kanouni et al. 2002) On the basic of slow and sustained release of active ingredients from an internal reservoir into the external aqueous phase, the main function of double emulsions is regarded as an internal reservoir to entrap ingredients whatever you choose into the inner confined space, in order to protect against oxidation, light and enzymatic degradation. As a result, sensitive and active molecules can be protected from the external phase by the function of internal reservoir. In addition, because of the phenomenon of release of water or ingredients which can be observed in the experiments, the active ingredients will exist partly in the internal aqueous phase, partly in the oil phase and occasionally in the external phase(Benichou et al. 2004) .In the food industry, double emulsions provide some advantages because of their capability to encapsulate some water-soluble substances, such as flavours or active ingredients which are then slowly released from the internal compartments. Additionally, we should select food-grade additives which is soluble in the internal aqueous phase because the consumer products in food industry will be applied in our daily lives. Furthermore, as the development of needs in food quality, the production of low calorie and reduced fat products come into food market. (Muschiolik, 2007; Van der Graaf et al., 2005). In agrochemical industry, it has become incr easingly difficult for scientists to produce products, such as pesticides which are effectively and simultaneously friendly to the environment. According to ElShafei et al. (2009), the idea of multiple emulsions has been successfully applied to the agriculture products and the multiple emulsions are relatively stable even on storage at room temperature and 4 ?for 30 days. As government increasingly pay attention to the safe and environmentally friendly products, the research in this orientation has draw publics attention. Till now, no pharmaceutical multiple emulsions have been brought to the market, because potential emulsifiers used in multiple emulsions are only available in cosmetic grade but not be applied in pharmaceutical grade. (Schmidts et al., 2009 ) In cosmetic area, the possibility of combining incompatible substances in products in order to offer more favorable functions. (Vasiljevic et al., 2005) multiple emulsions also have the potential to change the commonly oily feel of hand-cream to aqueous texture. The advance of products of cosmetics has brought out more space to develop in order to get more profits. (Kanouni et al., 2002) Methods of preparation: Scientists have done some research in multiple emulsions as the applications provide us more convenience and bring better consumer products in many areas. Because double emulsions have more complex structure and are even more thermodynamically unstable than single emulsions, they prone to be difficult to prepare, especially on an industrial scale. The difficulties of preparation of multiple emulsions have draw scientists attention, so many research have been pour into this area. In general, there exist single -step and two -step emulsification methods to prepare multiple emulsions (Allouche et al., 2003). Due to a multiple emulsion is considered as a mesophase between O/W and W/O emulsion, the one-step method of preparation means a combination of the two different types of emulsions and surfactant phase, which is very difficult to control. So, such method will not be chosen in the preparation (Matsumoto, 1987; Mulley and marland, 1980). On the basic of previous study, the two-step emulsification process is considered as the most common and better controlled method. First of all, W1/O emulsions are much easier to prepare and it is also easy to control various characteristics in these emulsions as the parameters in them are relatively limited . Secondly, in the second step, it is widely believed that the complex structure and variable quantities result in relatively difficult to control or regulate. Many methods have been commonly used to improve the preparation of multiple emulsions, adding suitable emulsifiers is regarded as one of the most significant one. In general, two kinds of emulsifiers are introduced to add in the preparation of multiple emulsions as the difference of their functions. Because of the different affinity of the emulsifiers, hydrophobic emulsifier Emulsifier I which is used in the oil phase and hydrophilic emulsifier Emulsifier II which is used in the external aqueous phase (Garti, 1996). The hydrophobic emulsifier is designed to stabilize the interface of the W1/O internal emulsion and the hydrophilic emulsifier acts as stabilizer at the external interface of W1/O/W2 emulsion. The main function of emulsifiers is enhancing the stability of multiple emulsions in the preparation and even the long-time storage. The process of two-step preparation is shown in Fig.2. In the first step, the primary W/O emulsion is prepared under high-shear conditions (homogenization) to obtain small droplets, whereas the second step is carried out with less shear in order to avoid rupturing the internal droplets because the second step i s much difficult to control than the first step (van der Graaf et al., 2004). On the basic of Kanouni et al., (2002)s earlier work, in the first step, they usually use an Ultra-Turrax mixer with a relatively high speed to prepare a W1/O emulsion which is a combination of internal aqueous phase and an appropriate oil phase with suitable low HLB emulsifier; in the second step, the W1/O/W2 multiple emulsions will be produced by adding proper high HLB emulsifiers using Ultra-Turrax mixer or mechanical agitator with relatively smaller rotation speed. In the previous study, stirring apparatuses, rotor-stator systems and high pressure homogenizers are considered as the most commonly and conventional emulsification devices (Schubert and Armbruster, 1992).As shown in table 1. the functions and disadvantages has been tabulated. There are several drawbacks in such existing methods of production ( Williams et al.,1998). First of all, it is not easy for us to control the droplet size and droplet size distribution of the final multiple emulsions products. Secondly, it is difficult to scale up because different classes of the products are generated per batch on the same manufacture conditions, which contribute to one of the main factors why such products can not be applied in the industry. Moreover,van der Graaf et al. (2005) illustrate that conventional methods are not feasible in preparation of double emulsions, because high-shear stresses can result in rupture of the internal emulsions which should be avoided in the secondary emulsification (van der Graaf et al., 2005) Different kinds of emulsification devices can generate various multiple emulsions with different conditions, such as droplet size, encapsulation efficiency, release rate, and so on. What has interested the scientists most recently is researching novel approaches to improve the emulsification equipment in order to generate more stable and ideal multiple emulsions. Much attention has been put in the improvement of the second step by using various pieces of equipment and novel method. Nakashima et al. (1991) points out that membrane emulsification is widely accepted as one of the new method for the production of emulsions recently( Nakashima et al., 1991). This technique is increasingly attracted because of its low energy consumption, the better control of droplet size and droplet size distribution and especially the mildness of the process, especially suitable to be used in the second step to prevent rupture of the double emulsion droplets (van der Graaf et al., 2005). Joscelyne and Tragardh (1998) demonstrate that it is favourable to prepare small droplets when the conditions are higher concentrations of emulsifiers, high wall shear stress through a membrane with small pore size. As shown in Fig.3. because of the mild conditions in the process of membrane emulsification, it is easier to produce small size droplets and protect the multiple emulsions from membrane rupture, especially useful in the second step of emulsification. The system chosen ceramic membranes of different average pore size to prepare relative small droplets in multiple emulsions because such kinds of emulsions more stable. Membrane technology can be applied to the many productions, such as oil-in-water (O/W) emulsions t, UHT products and so on (Joscelyne and Tragardh 1998) .However, low flux of the dispersed phase is the main and visible drawback of membrane emulsification (Charcosset et al., 2004),which is caused by the properties of membranes with a low hydraulic . In general, two methods are commonly introduced in membrane emulsification: cross-flow membrane emulsification and pre-mix membrane emulsification (Suzuki et al., 1998). Take pre-mix membrane emulsification as an example, as shown in Fig.4. the most significant advantages of such method is it can provide high flux, which can improve the membrane emulsification process. Various novel methods have been reported to improve the disadvantage of membrane emulsification. (Gijsbertsen-Abrahamse et al., 2004) for example, with the advance in nano- and micro engineering, it is possible to produce membranes with a low hydraulic resistance named microsieves. (Van Rijn et al., 2005) Microsieves, inorganic membranes, which can offer a very thin selective layer, high controlled pore size and shape, and smooth surfaces. As shown in Fig.5., SEM images of pore morphology of a silicon nitride microsieve surface. Microsieve membranes contribute to flux decline in crossflow filtration of bovine serum albumin (BSA) solutions. (Giron`es et al.,2006) According to Shnji Sugiura et al., (2003), monodispersed multiple emulsions which are good at providing relatively stable conditions are regularly applied in industries and basic studies, on the basic of easier observation, monodispersed emulsions are regarded as an effective approach in determining the resistance to coalescence of an emulsion, and in observing how the active matter go through the oil film by diffusion. (Sugiura et al., 2003) Furthermore, a microfabricated channel array has been pointed out as a promising method for preparing monodisperse emulsion droplets (Kawakatsu et al., 1997). This type of emulsification technique is called microchannel (MC) emulsification, which is regarded as a novel method for preparing monodisperse emulsions. Owning to the advantages of this technique, it is a promising technique to improve the stability of multiple emulsions. (Kawakatsu et al., 2001; Sugiura et al., 2001 ). Nakagawa et al.(2004) suggest that monodisperse surfactant-free mic rocapsules can be produced by MC emulsification using gelatin. Of course, this technique need further study to improve its low production rate. Improvements in stability of multiple emulsions In practice, significant problems may arise, not only the thermodynamic instability of emulsions, but also many destabilization phenomenon, such as flocculation, coalescence and creaming, have contribute to the unstable emulsions (Vasiljevic et al., 2005). In order to protect the emulsions from the formation of flocculation or coalescence, two methods have been introduced to protect the droplets from each other, one is increasing viscosity of the external phase, the other is energy barrier. The DLVO theory is commonly applied to explain colloidal stability. when the distance between two colloid particles is increasing from small to large, the resulting potential is rage from negative to positive because the existence of attraction potential and repulsion potential ( Friberg, 1997). Various factors may have an effect on the stability of multiple emulsions, including the method of preparation, the oil type, type and concentration of the emulsifier and so on (Vasiljevic et ,al. 2005). On the basic of fundamentally experimental data, we choose the relatively suitable and effective conditions to prepare multiple emulsions. Many research have been put into how to improve the stability of multiple emulsions because thermodynamically unstable multiple emulsions not only exist in the process of preparation ,but also occur during storage or on exposure to environmental stresses such as mechanical forces, thermal processing, freezing or dehydration. On the basic of developed techniques, we can observe or measure the leakage of the inner aqueous phase(W1) in the outer phase and destabilization properties of the emulsions. There are four mechanisms explaining the instability of W1/O/W2 multiple emulsions: (1) the instability comes from the inner aqueous droplets because of coalescence; (2) the instability comes from the oil droplets because of coalescence; (3) rupture of the oil film (4) transport of water and ingredients through the oil layer (Appelqvist et al., 2007,; Florence and Whithill,1981; der Graaf et al., 2005). In the real conditions, there may exist more than one mechanism in the multiple emulsions, different results to different situations. The determining of primary mechanisms exist in certain multiple emulsions should dependent on the experimental data and convincing analysis. What should we do is research more reasonable methods to solve the problem of thermodynamically unstablity in multiple emulsions. Three kinds of approach aiming at improving stabilization and slow solute release have been list as follows (Davis et al., 1985) : (1) stabilization of the inner W1/O emulsion, for example, the addition of various emulsifier combinations (Apenten and Zhu, 1996; Shima et al., 2004; Su et al., 2006); (2) stabilization of oil phase by choosing suitable oil type and the addition of proper carriers, complexants and viscosity builders, for instance, the solidification of the oil phase and the modification of the solubility and polarity of the oil phase to make it less water soluble (Tedajo et al., 2001); (3) stabilization of the external aqueous phase, such as increasing the viscosity of the outer aqueous phase (-zer, et al., 2000). Although many strategies have been categorized above, a majority of them are not suitable to apply in food industry because they are not easily scaled up in industry or they include not food- grade ingredients entrapped in multiple emulsions, which may make a bad influence on human health. So, there exists numerous space for us to research in the methods of improving the stability of multiple emulsions. (ORegan and Mulvihill, 2009) In general, many factors contribute to the improvement of stability of multiple emulsions as some research have deeply determined the main causes of thermal unstable phenomenon and flocculation, coalescence and creaming phenomenon. The nature and internal properties of surfactants or emulsifiers play a vital role in solving problem. Stability of multiple (Opawale, et al., 1998) emulsions has been shown to be dependent on emulsifier interfacial film strength, ionic strength, various additives, and concentration. According to Vasiljevic et al. (2005), when the concentration of emulsifier in oil phase is higher, the multiple emulsions will have lower droplet size, higher viscosity and elastic characteristics. Moreover, changing the concentration of surfactants, results in the difference of the amount of retinol released from silica particles. In addition, different polymers which are added into the aqueous phase, the encapsulation efficiency of retinol was also changed (Hwang et al., 2005). The process of multiple emulsion formation and various destabilization processes can be determined by video microscopy (Ficheux et al., 1998). A unique dimpled structure is a signal to show the deformation of the multiple droplets and coalescence of the internal dispersed phase by coverslip pressure. If the multiple emulsions po ssess relatively high stability, then such structure come out for long-time observed in the presence of adequate concentrations of surfactants and additives. So, Formation of the dimple structure is linked with interfacial film strength and long-term multiple emulsion stability (Jiao et al., 2002). The long-term stability of the double emulsion requires a balance between the Laplace and osmotic pressures among droplets in W1, because a stable W1/O emulsion is a fundamental and significant step in order to prepare a stable W1/O/W2 double emulsion. Garti (1996) illustrate the concept of weighted hydrophile-lipophile balance (HLB) is important because the value is linked with the droplet size, the number of W1 dispersed in inner phase and the stability of the W/O/W multiple emulsions. Such properties are so significant in preparing relatively stable multiple emulsions that the weighted HLB value is considered as a potential reference to select the optimal type of emulsifiers in forming multiple emulsions. In the first step of preparation, HLB(I) stands for the HLB value of the hydrophobic emulsifier, CI means the weight percentage of the hydrophobic emulsifier in the fundamental W1/O emulsion, In the second step of preparation, HLB(II) stands for the HLB value of the hydrophilic emulsifier, and CII means the weight percentage of the hydrophilic emulsifier in the W1/O/W2 multiple emulsion It was observed that using a combination of an amphoteric high HLB surfactant and an anionic surfactant can prepare a stable system(Kanouni et al., 2002). The inner phase is demonstrated to be better stabilized by minimizing the size of droplets and forming microemulsion droplets or microsphere particles, or applying more potential surfactants in order to seal the active ingredients in the interface (ORegan and Mulvihill, 2009). Choosing of optimal surfactants has made a positive effect on controlling particle size in multiple emulsions. Sepideh Khoee and Morteza Yaghoobian (2008) propose that the mean diameters of nanocapsules containing penicillin-G are linked with the properties of surfactants. that is to say, the different types or content of surfactant used in formation of multiple emulsions can result in different droplets size. N. Heldt et al. (2000) point put that changing the ratio of lecithin/SXS make an effect on the average size of the corresponding vesicles in the oil-wa ter emulsion. In addition, egg lecithin considered as hydrophobic substance, sodium xylenesulfonate (SXS) acts as the hydrophilic matter. As the ratio goes up, the average vesicle size increases correspondingly. Stability can be improved by offering suitable stabilizer because the surfactants act as film former and barrier to the release at internal interface(Khoee and Yaghoobian, 2008). Two charged biopolymers, whey protein isolate (WPI) and enzymatic modified pectins, interacted in aqueous solution to form a charge-charge complex which acts as a hydrophilic polymeric steric stabilizer improving the multiple emulsion stability .Regulating the conditions to get the result of most relatively stable condition. For example, as pH can determin the size of the complex ,when pH =6, the most stable double emulsion are gained because of the smallest droplet size, the lowest creaming, highest yield, and minimized water transport(Lutz et al., 2009). Henry et al. (2009) have studied six emulsifiers in their experiments, it is shown that as the amount of emulsifier increased, the phenomenon of coalescence occurs go down. Furthermore, droplet size is dependent on both break-up and re-coalescence events in emulsification, for example, when the surfactant concentration is lower, the droplet size is prone to a result of multiple break-up events. It is shown in the results of experiments that the frequency of droplet coalescence is decreased to a minimum as the process of preparation is under an optimal surfactant concentration, which balances the formation of the smaller possible droplets and relatively stable in preparation and long time storage. On the basic of experimental results which is analyzed by equilibrium phase diagram as well as observed through polarization microscopy, Yihan Liu et al. (2009) have got the conclusion that certain type of multiple emulsions which a liquid crystal can be formed by the surfactant with water are more stable compared to counterparts with no liquid crystals exist in the surfactant but prepared in the same condition(Liu and Friberg, 2009). Garti and Aserin (1996) propose that macromolecules together with monomeric surfactants can be served as steric stabilizers to improve the stability of multiple emulsions. The synthetic polymeric surfactants are ideal interfacial barrier to improve thermodynamic stability and entrapment, which is very helpful in reducing release rate of entrapped additives,and preparing smaller double emulsions with long-time stability. Take WPI-polysaccharide conjugates as an example, compared with monomeric surfactants used only, the application of polymeric emulsifiers results in better encapsulation and controlled release of addenda (Benichou et al., 2006). Transport mechanism in multiple emulsions Various kinds of possible mechanisms have been illustrated to interpret how the substances transport through the oil phase. Oil soluble substances just transport through the oil phase by diffusion which is served as controlled mechanism. Many factors contribute to the transport rate, such as the properties of oil phase, the nature of ingredients, and the conditions of aqueous phase (Chang et al., 1987) .In the previous study, it is found that water and water soluble substance can easily migrate through the oil phase. Kita et al. (1977) demonstrate that two possible mechanism can be applied to interpret the phenomenon of transportation: (1) reverse micelle transport; (2) diffusion across a very thin lamella. Cheng et al. (2006) demonstrate that both Cl- and Ag+ can transport through a thick oil film through observing and measuring the formation of AgCl precipitate in the W1/O/W2 multiple emulsion. Ions can not transport through the oil film which is very thin (

Metal Storm :: Technology Weapons Essays

Metal Storm What is Metal Storm? Metal Storm is a revolutionary type of ballistics technology, utilizing electrical impulses to fire projectiles, rather than conventional mechanical impulses. These weapons have no moving parts aside from the projectiles themselves. The bullets are stacked on end in the barrel, separated only by a thin layer of propellant. A small electric current passing through the barrel ignites the propellant, firing the bullet from the barrel. To prevent one layer of propellant from igniting the rest of the propellant in the barrel, causing a disastrous chain reaction, the bullets are modified so that the head of the bullet will expand, sealing the barrel, when the bullet ahead of it is fired. Because of this and the nature of its electrical firing system, Metal Storm offers a variable rate of fire, from semi-automatic to a devastating 45 thousand rounds per minute per barrel, with each bullet leaving the barrel at only 4† behind the last. Also, because all that is necessary to prope l a bullet from the barrel is an electrical impulse, many barrels can be placed in an array and fired all at once. Metal Storm Ltd., the company that produces Metal Storm ballistics technology, has produced a prototype gun, nicknamed â€Å"Bertha,† which can fire at a rate of up to 1.62 million rounds per minute. Comparing this to the fastest rate previously achieved by a machine gun of 6,000 rounds per minute, one can begin to see the deadly power of this technology. And while one might think that energy would be an inherent problem with an electrical firing system, in this case, it’s not. Because the electric current is only used to ignite the gun propellant, only a very small amount of energy is required, and Metal Storm weapon can operate easily on the power from a simply flashlight battery. In addition to the machine gun, this technology is also being put to use in other applications, including a handgun variant (intended for use by military and police), a sniper-rifle (recently contracted by the United State’s Department of Defense), and even an Area-Denial Weapons System (to replace land mines), which can be operated by a single man to fire up to 1800 grenades and 360 solid mortar rounds intelligently aimed at enemy units in only a quarter of a second. Beyond this, they have also begun work on a fully automated aircraft.

Essay on Character Parallels in To Kill a Mockingbird :: Kill Mockingbird essays

Character Parallels in To Kill a Mockingbird  Ã‚  Ã‚  Ã‚      In real life there are many different types of people, some of them are similar to one another, while others can be opposite/different, just like in the book To Kill a Mocking Bird, by Harper Lee. There are many people in the book, some people are contradictory to one another (character foils), while others resemble each other (character parallels) in both good and/or bad ways. Atticus Finch and Aunt Alexander is an example of a character foil in the book. Even though they are brother and sister and grew up together, they are two people with very different views. Atticus is more easy going when he raises up Jem and Scout, for example he lets his kids call him Atticus, and let's Scout dress with the clothes that she feels comfortable in. While on the other hand Aunt Alexander is more strict, she cares a lot about family background and she wants Scout to act and dress more "lady like". Atticus views that it is his duty to do his best in the Tom Robinson trial and feels no prejudice against Tom, because he is black. While Aunt Alexander doesn't like Atticus taking the case because Tom is black, and wants Atticus to go and fire Calpurnia. Tom Robinson and Bob Ewell is another example of a character foil in the book To Kill a Mocking Bird. Bob Ewell and Tom Robinson are two completely different people in the story. They both don't have a lot of money, but Tom Robinson chooses to work hard for his money, while Bob Ewell lives off welfare and sqaunders all his money on booze and whiskey. Bob Ewell beats up on his daughter Mayella, while Tom tries to do all that he can in order to help her out. Tom says that he did not beat and rape Mayella, while Bob Ewell says that he did. Two characters that are similar to each other are Tom Robinson and Boo (Arthur) Radley. These two are similar in that there are false rumors going on about them. People accused Tom of beating and raping Mayella Ewell, and people talk about Boo, and say that he is a very violent person, when those things are both false.

Explaining of The Child Protection in The Wider Concept of Safeguarding Children and Young People

Explain child protection in the wider concept of safeguarding children and young people. Safeguarding of children is known as an umbrella term which means it involves everything to ensure the health and safety of the children. Safeguarding of a child is priority, whether it to be at home, nursery, youth clubs, in a social setting or in someone else’s care. Also whether it is an adult they know or don’t know or even another child, knowing the welfare of each individual child is paramount.In doing this there are many policies and procedures to follow regarding a child’s health and safety, in which companies have to enforce these policies and procedures in a child based setting. When a child based setting is recruiting new members of staff there are many checks that they need to do, the main check is their DBS checks commonly known as their CRB to ensure they have no criminal convictions, ever been on a sex offenders list or are a general risk to children.Communicat ion with a child’s parent is so important when it comes to a child’s welfare knowing how the child’s home life is and any concerns the parents may have about their child. Having a good working relationship with the parents and getting to know them is key, they are entrusting us with the welfare of their children. It is a difficult transition for parent sending their children to nursery for the first time knowing that their child is going to be safe and their well-being is going to be well cared for is reassuring to them.Making sure a child’s welfare is safe in all aspects of life is a vital part of their development in their learning capability, in their confidence and in the long term impact into adult hood. It is important that all staff know the correct policies and procedures if they have cause for concern, finding ways to do this is updating safeguarding polices regularly and retraining staff often to ensure this.Also setting up a CAF (common assessm ent framework) and making contact with multi agencies for a child who they have cause for concern for and putting  support in place for them is a good way to ensure a child in need is getting the best possible support, and them knowing that someone is there to listen and support them is reassuring to the child. Making staff stand out as staff with the correct uniform and ensuring ID is in full view for the parents and other staff to see clearly for identification.Making sure that the staffs don’t put themselves in any sort of situation to possible complains that can arise i. e.  no mobile phones or if any conflict with a child make sure it is handled correctly following the correct policies and procedure guidelines of your work setting. Also making sure schools and nurseries know who exactly are coming in and out of the building with a signing in book. There are all types of abuse, physical abuse, mental abuse, sexual abuse, neglect and verbal abuse, following the safegua rding policies and procedures will help ensure a child’s health and safety.Making sure these policies and procedures are followed correctly will give the child the best outcome in life. There are many ways to protect a child, at home, in a school or social setting. Unfortunately in today’s society there is a dip in the system when it comes to the protection of children, so many children are being put a risk. People need to be more vigilant to stop children getting abused in any sort of way. Every child matters they are our future abuse needs to stop, people need to become more aware to help prevent these things from happening.

Milk †Cheese Essay

Milk contains all the food, including protein, fat, sugar, and other nutrients, a young mammal requires for a long period of time. Milk comes from sheep, cows, and goats. Milk is good for us because we grow up healthy and have a strong body; we have sharp teeth and have energy. Everybody needs milk, for example: babies, toddlers, sick people, children, and elderly people. In various parts of the world, goats, reindeer, donkeys, yaks, water buffalo, and sheep are domesticated and milked. In most countries, however, dairy cows provide milk. Milk and milk products are drunk and eaten in many forms, including buttermilk, cheese, yoghurt, and butter. Milk can be reduced to powder, concentrated in a thick liquid, and used in cooking. Fresh milk sours quickly, but, when changed into forms such as cheeses, it can be kept for a long time. People consume milk in fresh, dried, and condensed forms. Fermented-milk products, such as buttermilk, sour cream, and yoghurt, are also available. Milk is used to make food products such as butter, cheese, and ice-cream. Under normal conditions, the milk of mammals is the only food necessary for the health and growth of that mammal’s young for certain period after birth. Cow’s milk can be substituted for human milk in feeding babies only if the proportions of water and sugar to other components are increased. Milk is composed largely of water; cow’s milk, for example, is approximately 87 percent water by volume. The main nutrients, food elements are: proteins, the principal proteins in milk are casein and albumin. They contain all the essential amino acid for building tissues, blood and hormone substances. Casein is found only in milk and gives milk its whiteness. Carbohydrates, the fat of the milk is called butterfat, or milk fat, and is the part of milk from which butter is made. It is an important source of energy and rich in vitamin A. Minerals, milk are one of the best natural sources of calcium and phosphorus. Its other minerals include iron, copper, sodium, potassium, magnesium, sulfur and iodine. Vitamins, milk contains all the known vitamins, but only four-riboflavin, vitamin B2, thiamine, vitamin B1, niacin and vitamin A in significant amounts. Milk is an excellent source of riboflavin; it contains only a little less than does an equal amount, by weight, of lean meat. Microorganisms that Disease-causing organisms present in the cow can be passed on to the milk. Contamination can occur when the milk is obtained, stored, or transported. Milk is pasteurized to kill and prevent growth of microorganisms. Milk products: raw milk is natural, fluid milk. Pasteurized milk is milk that has been heated to 63 degrees.