Wednesday, November 27, 2019
Holding On free essay sample
A soft contemporary gospel graced the air as the youth pastor began his monologue to the audience of teenagers. They raised their hands in both anticipation and in attempt to grasp the words as they left the delicate speech of the pastor, his young face glowing a slight pink as his emotions filled him with spirit. I couldnââ¬â¢t grasp exactly what he said, or rather I do not remember his words, but I could tell from the mumblings of the crowd and the swaying motion of the musicians that whatever this man said it could be translated as ââ¬Å"sermonâ⬠. What I do remember of the service was the slick hardwood beneath my fingers as I pressed them against the seat of the booth I sat in. As the hands of the audience raised higher, I sank my fingers into the seat, as if in fear that I would float away with the music drifting through the stuffy air. We will write a custom essay sample on Holding On or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Ever since, and even before, I came out, I have dealt with the fact that no matter what church I go to, even in my home church, there will always be someone there who believes Iââ¬â¢m choosing the painful card I was dealt, and who believes that because of this unlucky fate I will be thrown into eternal torture. Luck of the draw, I suppose. Yet this sentiment is found even outside a religious setting. What Iââ¬â¢ve found throughout my journey is when youââ¬â¢re Queer, in gender identity, sexuality, or both, the church becomes a constant opponent in the matter of both civil rights and protections, to simple tasks such as buying clothes and ordering coffee. The simple micro-aggressions experienced in every waking hour, such as those around you refusing to use the correct pronoun or name, or being the topic of debate among friends and classmates, take a toll on a person mentally and emotionally. It becomes harder to trust others, and harder to create expectations, when the reli gious views of individuals are treated as more relevant than your state of being. For these reasons, unknown places of worship such as the many conservative churches in our area have become my least favorite places. The moment you walk into such a place, itââ¬â¢s as if the air itself stops circulating and you. You feel your lungs exhale slowly, desperately trying to release the tension built up from the many mental rehearsals of confrontations both theological and physical. The videos of pastors screeching about homosexual demons and perverse cross-dressing abominations swirl in your mind as you try to read the faces of those around you, and determine who is an enemy and who is safe to talk to. This paranoia causes your cheeks to flush and your body to flinch at each interaction. You see beyond the smiling faces, you tell yourself, and look deeper into the societal prejudice they hold for you though they may not know it themselves. This feeling of suspicion and as what I can only describe as ââ¬Å"prejudicial securityâ⬠is present each time I visit a church that is not my own. I can distinguish the faces of my home church far easier than the faces of a foreign church. This has become the reason why I despise the visiting of churches in our area. When I accompany a friend to their church, whether it be Non-Denominational or Pentecostal, the air in the sanctuary is suffocating as if the exhale of each congregate steals the oxygen from your body. Every sense your body detects becomes detestable. The smell of burning candles and fresh paint infests your nose, causing you to cough uncontrollably. Eucharist wine and small pieces of bread become poison that decimates your immune system, to where every word said to you infects your insides. Your ears bleed at the sound of members speaking in tongues. The feel of the padded pew or slick balcony seat absorbs your finger tips, turning from red to white. Itââ¬â¢s astounding to me, who is so affected by the presence of toxic religion, that I still wish to pursue Seminary and form my major around the study of God. It has made me question my way of thinking about God, and if the traditions I was exposed to as a child, and still now, hold a light to how God truly is. Is my God a vengeful entity who damns the oppressed? Does my God conform to a patriarchal society that condemns those who do not fit the typical gender binary? Was Christ sent to save the world from my God? These questions of theology and morality that I had left unquestioned and unchecked as a child have now seized my waking thought; was everything I was taught about God and Jesus Christ wrong? Through many conversations and exploring of liberation theology, I have found that my God is a God who embodies the oppressed. My God values diversity and created such differences among creation for a reason. My God, who exists as the spiritual form of the ostracized and forsaken, by definition is the face of the oppressed itself. My Christ, being the son of God, must therefore be the embodiment of the forsaken in the flesh, existing as a Queer person of color whom history has lost to the white-washed, cisgendered, hetero-normalized, structure of modern society. After coming to these conclusions, Iââ¬â¢ve realized that I have made a large step forward to a more confident and more actualized version of myself. The fear of a toxic worship slips from my mind as Rev. Jessica Hawkinson, a holy and kind person who welcomed me to join the Lux Theological Institute for Youth at Monmouth College, stands before a modest podium with a colorful cloth gently draped over it. Her voice is soothing and calm as she welcomes the sixteen other students surrounding me to the Institute, and her eyes fill with tears as she speaks, causing my vision to shake as I began to cry myself. The Rev. Chuck Goodman, a compassionate and enthusiastic pastor from Springfield who was invited to help deliver the sacraments and lead worship for the youth, invites all who sit before the podium to touch the water in the wide clear blue basin sitting upon the table. The sixteen other student surround the basin, lightly dipping a hand or finger into the water. I stand at the back, grasping the shoulder my friend Ellie. Iââ¬â¢m still fighting back tears as a picture is taken of everyone at the basin. I can be seen grasping Ell ieââ¬â¢s shoulder, holding on to her soft skin. My fingers quake as Rev. Goodman continues to speak. I eventually let go, letting myself drift with his words through the stuffy air.
Saturday, November 23, 2019
Washing up liquid advert Essay Example
Washing up liquid advert Essay Example Washing up liquid advert Essay Washing up liquid advert Essay This essay is going to discuss the Fairy Aromatics washing up liquid advert. The advert is to promote the new fragrances and bottle shape that Fairy has recently introduced.Ã This advert does not have a narrative. Instead it just uses a series of bright, eye-catching images in modern colours to make you remember the advert, and hopefully the product too.Ã The advert is in three main parts, one to advertise each of the three new fragrances. The first part shows a woman with short hair in her early thirties falling back on to the petals of a giant pink flower, the same colour as the new spring fresh liquid. She breathes in the scent of the product with a relaxed and happy expression on her face, and then demonstrates the product by washing a plate, which comes out of the water sparkling and clean. The screen then cuts to the second character, a young man, who slides down a giant spiral apple. He also appears relaxed and happy, and is obviously having fun. There is then a special effect, as there is a cube rotation to link the end of this shot with the next. The last character is a young woman, this time with longer hair but approximately the same age, who is bathing under a giant lemon half. She massages her hair and appears relaxed and refreshed as she stands under the shower. At the end of the advert the screen is divided into thirds, each showing an object to represent on of the fragrances. Each third then goes through an open door rotation to reveal a bottle of the product in each of the fragrances corresponding with the object in the shot before. The shot at near the beginning of the advert where the first woman is washing up is quite realistic, although everything is very clean in comparison to how you would usually expect it to be. However, the rest of advert is quite surreal as it features people interacting with giant fruits and flowers. There are three characters used in this advert, two women and one man, each one specifically endorsing one of the new fragrances on offer. We can see from the choice of characters that Fairy is trying to appeal to a larger target audience than before. Traditionally on the Fairy adverts we see a woman with a young child, who is probably slightly older than the characters used here. Now they have chosen to include a token man in the advert as well, showing that they are attempting to include men in their new target audience. They still however show a woman actually doing the washing up rather than a man, which is quite stereotypical. The fact that they show more women in the advert rather than men shows that they still want the product to appeal more to women, as usually it is still the woman that actually goes out shopping to buy household things like washing up liquid. The chosen characters in this advert are all being used as role models for the audience. The first woman in particular seems to be the perfect housewife. Her kitchen is spotlessly clean, and her hair and make-up is done beautifully, even though she has only been cooking the dinner. When she washes the plate, it requires no effort for them to become brilliantly clean and sparkling. She has the kind of stereotypical television lifestyle that many people would love to have. As people want to be like her, they will also want the things she has, like the washing up liquid. When she washes the plate, the light focuses on this rather than her, as it shows the wonderful result the product has achieved, and draws your attention to it. Throughout the shots she appears in, her facial expression always shows confidence and relaxation. When she falls back on to the flower she closes her eyes and her body language is open as her arms are held out away from her body. This shows her confidence, and also shows she is relaxed in this situation. Her expression also shows hints of luxury as she falls on to the petals. In this shot the light is focused on her face so these feelings are conveyed to the audience. The next shot, the close up on her face, helps to reinforce these messages. The next character, the man, also shows an expression of confidence and happiness. Again, his body language is open as he holds his arms up and out to the sides as he slides down the apple with the camera tracking him. As the shot changes from the first woman to him, the music also changes slightly, but not dramatically. A guitar is added into the instruments already used, which gives it a slightly more masculine sound to the melody. It also adds a more fresh sound to the music as the focus changes from the floral fragrance to the apple one. It is subtle but helps the scenes flow smoothly from one to another. To make the next transition smooth, a cube rotation is used to link to the next scene of the woman bathing under the lemon half. The camera starts focused on the lemon, but then tilts down to a medium shot of the womans face. She appears relaxed and refreshed as she massages her hair under the shower, and the light focuses on her face. The camera then cuts to a shot looking up at her from below. This makes her seem like a role model, as she appears higher up than the audience and you are looking up to her example and how relaxed and happy she looks from buying this product.Ã All three of the characters appear happy to be associated with the washing up liquid. The bright, modern colours used in the advert, with the young characters make the advert appealing to the younger audience. The advert attempts to make washing up seem cool at a time when there is so much competition with dishwashers.
Thursday, November 21, 2019
Compassionate Care in Cancer Management Essay Example | Topics and Well Written Essays - 500 words
Compassionate Care in Cancer Management - Essay Example Compassionate care is an approach to treatment that aims to address the various issues affecting the lives of terminally ill individuals by improving their quality of life. Medical physicians and other healthcare personnel work to reduce any pain and discomfort and to make any other specific symptoms affecting these patients more manageable. This care is provided within an environment that the patients feels the most comfortable though they may be taken to hospital in the event any serious medical crisis occurs requiring specialized treatment. An important aspect of compassionate care is the provision of spiritual and psychological support to the terminally ill patients. These people have terminal diseases that are incurable and therefore have a limited time to live. As such, they suffer many psychological problems such as the feelings of grief, anger, anxiety, and sorrow because of the various diseases they have and the changes that have occurred in their lives because of those illnesses. In addition, they might feel a sense of guilt due to the feeling they are placing a large burden on their families, especially financial burden as the treatment of these diseases is very costly. Providing psychological and spiritual support to these patients is very important as it helps to address the various questions and concerns that they might have and to offer comfort as their lives draw closer to an end. It also helps those left behind to cope with the loss of the loved ones who have passed on. Erving Goffman established an important perspective to understand further the symbolic interaction perspective through the dramaturgical approach (Ditton, 78).
Wednesday, November 20, 2019
International Politics Essay Example | Topics and Well Written Essays - 1000 words
International Politics - Essay Example To this the constructivists argue that customs, culture and ideas principally determine the awareness of the world that we live in. The distinctiveness and welfare of a state can be molded by ideas and this serves to have more or less lasting effects on international relations. Conflicts emerge from fundamental and controlling outcomes of standards and shared hopes, distinctiveness, culture and social processes (Baylis & Smith, 2005). The notion of liberalism maintains that in order to determine the behavior of the state, it is important to consider the stateââ¬â¢s preferences, and does not accept the capabilities of the state for these purposes, which differ from one state to another. They are mainly dependent on the culture, economic system and the type of the government in each state. (International relations). Proponents of the dependency theory assert that all the third ââ¬â world countries are not poverty stricken. In the past, these countries had been rich, but they the colonial regime exploited and impoverished them. The powerful first-world nations compelled the third world countries to integrate into the mainstream of the world economy, which rendered their economy subservient to the insatiable needs of the colonial regimes of the first-world nations. These countries were unable to satisfy the needs of their society, due to the compulsions of their colonial masters. The wealthy and industrially developed countries dominated the global economy, and were never exploited by colonialism. (The IR Theory Knowledge Base). Functionalism deals with the functionality of organizations in terms of their purposes and tasks. Most international organizations were developed to address several problems, purposes, tasks and demands. Therefore, theorists argue that the growth of these organizations was mainly based on their responsibility to sort out these issues that could arise from time to time. The neo à ââ¬â functionalism
Sunday, November 17, 2019
Shifting Genres Essay Example | Topics and Well Written Essays - 1250 words
Shifting Genres - Essay Example Peter answered the man by telling him they were going to Fargo in U.S.A. shockingly the man told them that they must be joking because they can not survive in that place since it is too cold. The man laughed, but Peter Dut did not know the reason beyond the laughter. Having lived at Kakuma refugee camp the boys had not experienced cold climate since Kakuma is 1000C. By that time, the temperature in Fargo had dropped below 150C. The boys had only experienced cold from a frozen bottle of water given to them by aid worker in the refuge camp. Peter and his brothers belong to a number of 10,000 boys in Kakuma refugee camp from Sudan, who went to seek refuge in 1992 during the civil war in the southern part. The lost boys were given names after Peter Panââ¬â¢s orphanââ¬â¢s posse. A report from America showed that over 17,000 boys left Sudan and separated from their families in 1987 during the war. They fled to Ethiopia and then back to Sudan then finally to Kenya. They arrived in Kenya parentless, homeless and throng having walked over 1,000 miles. The boys were between the age 8 and 18 from the Dinka tribe. Many of the boys did not know their age and the aid workers gave them ages depending on their sizes. On the way to the camp, the number of boys reduced by half. Most of the boys died on the way because they were attacked by bandits, lions, swept away by river water and others attacked by crocodile. After living in a camp for 9 years without being governed the three brothersââ¬â¢ decided to move to America. The boys in the refugee camps were sponsored by the UN to study in America while others were to be released to start their own live because after five years they were 21 years. The time when the three brothers were to land in Fargo, snow was flowing in the streets and roads. Later, Peter with his brothers, Riak, 15 and Maduk 17, arrived at their home apartment which was fully furnished by the
Friday, November 15, 2019
Advantages And Disadvantages Of Supercritical Fluid Chromatography Engineering Essay
Advantages And Disadvantages Of Supercritical Fluid Chromatography Engineering Essay Even though high performance liquid chromatography is a widely used technique for extractions of analytes in many classes, SFC has clear advantages over it. In HPLC a substantial amount of organic solvent is generated with each extraction, which then needs to be disposed. However, the disposal of the organic solvents is expensive at $5 $10 per gallon, whereas SFC uses considerably less or no organic solvent which leads to a decrease in analysis costs [1]. In replacement of organic solvents an inert environmentally friendly mobile phase is used, often carbon dioxide which can be collected from the atmosphere, as it is energy efficient in the isolation of the desired products [2]. Also without the use organic solvents the product is more concentrated compared to HPLC where the solvent must be evaporated, without the need to evaporate any solvent there is a reduction in energy and labour costs [2]. SFC is similar to gas chromatography (GC) in that it has a lower viscosity and higher diffusion coefficient than HPLC which allows for quicker, more efficient separations as it more effective at entering porous solid materials than liquid solvents. The separation time can be cut down from hours or days to a few tens of minutes [3]. As seen in Table 1, supercritical fluids lie between liquids and gases, which allows for SFC to use features of both HPLC and GC. Due to supercritical fluids having gas like and liquid like density it has a greater solvating power so SFC has a larger molecular range which includes non-volatile molecules which methods like GC do not include [1, 4]. Also, unlike GC which does not analyse thermally unstable compounds, SFC is able to due to the low critical temperatures of supercritical fluids such as carbon dioxide (31oC) [1] ; an advantage of supercritical fluid carbon dioxide is that it has a varied solvating strength that allows for selective extractions [5]. Along with this by altering the temperature and/or pressure it is possible to achieve higher selectivity. The range of detectors is also wider for SFC compared to GC or HPLC this is because in SFC the mobile phase can be liquid or gas like, so GC and HPLC detectors can be used [1]. For example SFC with flame ionization detection (FID) can provide quantification of resolved materials with a sensitivity of 0.1 ng [4]. Due to the range of detectors available for SFC and the low critical temperature of the carbon dioxide mobile phase, the detection and analysis of thermally labile compounds has been successful [3, 5]. Another advantage SFC has over HPLC is separation of chiral compounds, in HPLC the process is very time consuming, in SFC however, due to the lower viscosity of the supercritical fluids, the chiral separation can be run at a flow rate of up to 5 times faster than that of the HPLC all while avoiding pressure build up. The higher flow rate of SFC consequently means that the productivity is higher than HPLC methods [2]. When used in large scale extractions, fluid carbon dioxide can be recycled and then reused this minimize the amount of waste generated [3]. Property Gas Supercritical Fluid Liquid Density g/cm3 (0.6-2) x 10-3 0.2-0.5 0.6-1.6 Diffusion Coefficient cm2/s (1-4) x 10-1 10-3-10-4 (0.2-2) x 10-5 Viscosity g cm-1 s-1 (1-3) x 10-4 (1-3) x 10-4 (0.2-3) x 10-2Table 1: Comparison of Properties of Supercritical Fluids, Liquids and Gases [1] Due to the fact that SFC has features of both GC and HPLC, SFC has diversity in the columns that can be used which are either open tubular (GC) or packed (HPLC). In packed column SFC by choosing suitable column dimensions and particle size [6], this can cause an increase in the number of theoretical plates (over 100,000) [2, 6]. Further advantage is SFC is very clean; mobile phase contaminants are usually trace quantities of other gases. The mobile phase is very free of dissolved oxygen and is not particularly reactive and the mobile phase is easily and rapidly removed [2]. A disadvantage of using carbon dioxide as the mobile phase is it does not elute very polar or ionic compounds; this is overcome by using an organic modifier. However, there are some disadvantages of SFC these include that if molecules are highly polar they are not soluble in the mobile phase. Usually SFC only moves a small amount of a large specimen onto the column Limited availability However, these limitations have been overcome through instrumental modifications that more appropriately address purifications of micro-scale and nano-scale quantities of physiological molecules. More sophisticated 2D systems (2D-SFC) allow for the interfacing of 2 SFC columns having different column coatings or packing and thus provide for orthogonal separation capabilities [2]. Instrumentation used in SFC Originally, SFC instruments were based on HPLC designs with some modifications, however now the design includes a pumping system, modifier module, post-column nozzle and a separator detector [2]. The mobile phase in SFC is pumped as a liquid and then heated up past supercritical temperature until it reaches the supercritical region. The mobile phase passes through the injection valve before the sample is introduced, which carries the sample into the analytical column. To ensure the mobile phase stays supercritical, pressure restrictors are placed at the sides of the detector or at the end of the column. The pressure restrictors are heated as too avoid clogging [7]. As SFC uses a supercritical fluid as mobile phase, there are two possible types of column setup; one setup is HPLC like which consist of two reciprocating pumps these allow the mobile phase to mix and the introduction of a modifier, a packed column which are placed in an oven the detector used is an optical detector and the pressure and flow rates can be controlled separately [7]. Packed column SFC has recently become popular again over the past decade due to drug discovery and the pharmaceutical industry, as it offers the use of an environmentally friendly mobile phase, carbon dioxide, decrease in waste generation and provides purified materials even on a large scale, when used for drug discovery packed SFC is usually coupled with a mass spectrometer detector [2, 8]. In SFC there are lower eluent viscosity and higher diffusion coefficient which as a result lead to an increase in efficiency and a shorter separation time, the low viscosity causes only slight pressure drops which in tu rn allows for the flow rate to be quicker (3-5 mL min-1) compared to that of HPLC (typically ~1 mL min-1) [1, 8]. The other column setup is capillary SFC which is an extension of GC that includes a syringe pump and a capillary column inside a GC oven with a restrictor with a flame ionisation detector (FID), however, in capillary SFC the flow rate of the pump controls the pressure of the system [6, 7]. Other detection methods are also used for capillary SFC one method is Fourier transform infrared (FT-IR) spectrometry. Capillary SFC is used for high separation power and is more suited for fluids with low density. However, capillary columns have some limitations these include sample loading capacity, detection limits and quantitation [6, 7]. As mentioned FID is mostly used for capillary SFC, although in certain cases FID can be used with packed column SFC when a non-flammable mobile phase is used. However, the mobile phase that is used is usually carbon dioxide which requires an organic modifier to deactivate any unbounded silanol groups in the stationary phase [10] thus causing the mobile phase to become flammable this in turn causes a high background signal and a loss of sensitivity. Alternatively, modifiers like esters or lower alcohols can be used in packed column SFC in order to improve the elution of polar compounds [9]. However, to avoid the use of modifiers, open-tubular capillary columns can be used, since silanol groups are not present in the stationary phase [10]. Compared to capillary columns, packed columns display higher efficiency per unit time; also separations can be transported directly from analytical or preparative liquid chromatography (LC) to SFC. Moreover, a standard liquid chromatograph can easily be converted into a supercritical fluid chromatograph [11]. It has was found that certain separations that were developed on a 50 ÃŽà ¼m i.d. capillary column can be repeated with the same or better performance on a 1 mm i.d. (microbore) packed column. The packed column system has the additional advantage of yielding excellent peak area precision. It is also shown that the combination of water and formic acid is an effective modifier for CO2 which can be used with FID [6]. A study using the water and formic acid modifier was conducted by H. E. Schwartz et al. formic acid is used as it has low background noise and therefore is more favourable, however another problem arises when using this modifier and that large gradient humps appeared during the run, these were most probably because of organic impurities in formic acid. A way round this problem is that water is added to the carbon dioxide via the use of an aquafier system, the aquafier system used by H. E. Schwartz et al. was a 15 cm x 4.6 mm i.d. silica column (100-200 mesh) that was saturated with ca. 40% w/w water. The column was placed between the pump outlet and injection valve. A test mixture of the formic acid and water modifier was performed by H. E. Schwartz et al. and prodcued the chromatogram as seen in Figure 1[6]. Figure 1 Chromatogram of a test mixture of formic acid/water/CO2 mobile phase. Peak identification (from left to right): n-eicosane, anthraquinone, n-triacontane, tocopherol acetate, cholesterol [6]. In Figure 1 the baseline rises this was due to the pressure program used, however due to the addition of water to the mobile phase which prevented the accumulation of formic acid on the head of the column no hump is visible. In Figure 1 it can also be seen that all the peaks have good shape and resolution even for the more polar compounds like anthraquinone, tocopherol acetate and cholesterol [6]. Mobile phases and stationary phases used in SFC In SFC the density of the mobile phase is about 200-500 times greater to that in gas chromatography. Compounds with high molecular weights are not usually detectable in gas chromatography, however with the density of the mobile phase being greater they can therefore be chromatographed [12]. A wide range of compounds have been tested for use as SFC mobile phases, however, a variety of these required special conditions, and would therefore not be suitable. This resulted in carbon dioxide CO2 being used as it was easily obtainable, low cost and safe [13], along with the critical temperature being 31oC and critical pressure being 73.8 atm [14]. A problem with CO2 as a mobile phase in a packed column is that if CO2 mobilizes a species then there is a possibility that the compound will be irreversibly adsorbed onto the column, this is because of the high activity of most sorbents, this does not happen in capillary SFC as inert fused silica open-tubular column are used. To avoid adsorption onto the column, surface activity needs to be decreased; this has been achieved by using modifiers [14]. There are two main reasons why modifiers are added to the mobile phase, first is that only a small amount of modifier is added in order to deactivate the sorbent active sites, second is when the modifier is added in higher concentrations (level of modifier needed is à ¢Ã¢â¬ °Ã ¥1%)it improves the solubility of the analyte in the mobile phase [14]. One problem with using modifiers is they have a high response when a FID is used; this high response causes an increase in the baseline. The alternative to using FID which helps relieve this problem is the use of a ultra-violet absorption detector, although it is not as applicable to organic compounds compared to FID [14]. This is only true for packed SFC, as when capillary SFC is used most separations are done using only CO2, which is compatible with FID. Having only CO2 as the solid phase can cause slight defects on the chromatograms such as very broad peaks and not well resolved, as well as longer retention times, this is solved by adding a small amount of water to the mobile phase, hence improving the peaks and decreasing the retention time [12]. Modifiers which can be used with the mobile phase include methanol, acetonitrile, chloroform and formic acid. Methanol is the most popular modifier being used in both packed and capillary SFC, even though the addition of water speeds up elution of polar compounds in capillary SFC [12]; methanol has a greater effect when used with silica-packed columns [14]. The solubility of methanol, acetonitrile and chloroform in CO2 was studied by K. L. Maguire and R. B. Denyszyn, they found out that when the pressure is below 90 for methanol/CO2 there was little effect on solubility, but when raised above 90 there was a substantial increase. Acetonitrile/CO2 had very little pressure dependence but small temperature dependence. Finally, chloroform/CO2 both pressure and temperature had a small effect on solubility, when either was raised the solubility of chloroform increased [14]. Research by G. L. Pariente and P. R. Griffiths showed when carboxylic acid groups were present in the analyte the retention time was greatly increased while still using CO2 mobile phase. The cause of this could be due to that the solubility of these polar molecules is low and the solvation is not great enough to overcome the strong hydrogen bonds. The alternative mobile phase used was chlorofluorocarbon (CCl2F2), in comparison to CO2 which had a capacity factor greater than 20 for isophthalic acid; CCl2F2 had a capacity factor of 3.9. These results suggest that CCl2F2 has sufficient free energy of solvation to overcome the hydrogen bonds [14]. Even though CO2à is the most extensively used mobile phase it is no more polar than hexane [15], so alternatives including CCl2F2 have been investigated, however the critical temperatures must not be too high as one of the main advantages of SFC is that elution can take place at mild temperatures. Another example is ammonia (NH3), as it possesses a high dipole moment and relatively low critical temperature, however supercritical NH3 reacts with siloxane linkages and when left for an extended time the siloxane stationary phase for capillary SFC breaks down too [14]. Therefore, a more useful way of eluting polar compounds is CO2 à and the use of a modifier [15]. For packed SFC more or less all of the stationary phases used in HPLC are used in SFC, most of these are silica-based, chemically bonded or encapsulated, or polymeric [8]. Evaluation of stationary phases of SFC was originally carried out by Schoenmakers et al. this was however, only done using pure CO2 as the mobile phase, and certain phases did not perform well, if a modifier was used these phases would have performed better. When CO2 and a modifier is used as a mobile phase the stationary phase also becomes modified in that both CO2à and the modifier adsorb onto the stationary phase. Depending on the stationary phase depends on the level of adsorption, for CO2 all phases adsorb the same but more polar phases adsorb more modifier than less polar phases. This causes the stationary phase to become more polar than the mobile phase, which in turn will cause polar solutes to interact more with stationary phase increasing retention time. Other stationary phases that have been studied include octadecylsiloxane-bonded silica (ODS), cyanopropylsiloxane- bonded silica, divinylbenzene-ODS, polydimethylsiloxane and porous graphitic carbon (PGC) stationary phases in supercritical [8]. In capillary SFC a problem arises in that normal GC stationary phases dissolve in the supercritical fluid mobile phase as they have a high solvating power. In order to correct the problem a non-extractable stationary phase is needed, examples of this are bonded phase where the stationary phase is attached to the column to surface groups via covalent bonds and cross linked phase where polymer chains within the stationary phase are attached to each other. In order to create non-extractable stationary phase, the process of coating must be undertaken, there are two types of coating, dynamic and static. The most favoured for SFC is static, as dynamic can lead to poor column efficiency and a thick stationary phase is not possible. In static coating the stationary phase is first dissolved in supercritical fluid and forced into the column, to avoid the removal of the phase cross link phase is used as it occurs between the polymers and not between polymer and substrate, and therefore can be applied to glass and fused silica columns [16]. Conclusion
Tuesday, November 12, 2019
Leadership purpose reflective essay Essay
?After watching this interview, I feel that a well defined leadership purpose statement is the distinction between a good leader and a great leader. Carolyn McKnightââ¬â¢s interview on leadership purpose statements really opened my eyes to the power of these statements, and the time and energy one needs to put into creating a leadership purpose statement. At first it seemed that completing a statement this powerful would be a very daunting task. After watching Mrs. McKnightââ¬â¢s interview, I am confident in my ability to come up with a statement, and that I will have the courage to follow through with it. The most significant thing in a true leadership purpose statement is authenticity according to Mrs. McKnight. Websterââ¬â¢s defines authenticity asâ⬠real or genuineâ⬠. Taking this and Mrs. McKnightââ¬â¢s statements into account I took a minute to think about how authentic I am. I realized that I know myself well enough to know where my strengths and weaknesses lie. Another aspect of my life that makes me believe in my authenticity is that many people have told me they value my opinions. This is because I always tell them exactly how it is even when I know it is not what they want to hear. With this knowledge I am able to establish creditability and responsiveness with other people. The question was asked ââ¬Å"How do you begin to determine leadership purpose? â⬠Mrs. McKnight gave several examples of what one can do to find this. ââ¬Å"What is the root of my life? â⬠was one question she brought up that can help you find a purpose. I immediately identified the roots of my life as hard work, determination, and dedication. I attribute all my success in my life to these three principles. I started to think about failures that I have had in my life. It made me wonder if I would be able to find a place where I got off course and did not apply one of these principles. Another statement that stood out to me under this question was ââ¬Å"Find what gives you meaning. â⬠My achievements are what give me meaning. I learned more about why I feel this way after I took the Strenghts Finder assessment. It pointed out that I was an ââ¬Å"Achieverâ⬠and could not be satisfied at the end of the day without feeling that I had achieved something. Every goal that I accomplish makes me feel more confident and more ambitious about what else I can achieve. Out of the examples she gave these are the two I think that will help me determine my leadership purpose statement. The part of the interview that discussed people struggling with conflict, with their leadership purpose was something that I really focused on. Early on in the interview an example was given that an ââ¬Å"acorn will become an oakâ⬠. When the subject of struggle comes up Mrs. McKnight ensures us of this fact and mentions to not fight it. She goes on to talk about all the people pleasing we do throughout our lives. This was a huge eye opener to me because I notice my need to please people, like my family. This causes conflict with the telling it straight attitude that I try to maintain with the people in my life. When I find myself trying too hard to please people, I lose some authenticity and it weakens my purpose. She stated that we really need to find what we want and not what other people want for us. I can see myself struggling with this as I develop my leadership purpose statement. I liked that she mentioned having the courage to follow what you deeply want. To me, people who can follow a path to what they want while sticking to it through the good times and the bad are really courageous. Emotional intelligence was another key area brought up in the interview. The three areas that were brought up under this topic are self awareness, social awareness and self regulation. Our text book offers another interesting point that supports Mrs. McKnightââ¬â¢s insights. The text book says that mental intelligence will get you into a management position but it stops being helpful after entry into that position. A leader needs to have good emotional intelligence to continue to lead. Self awareness has to do with my purpose and I am working towards finding that in this class. I know that I worry about how other people perceive me but I do not think that is the same thing as recognizing it, which is social awareness. I think that I will have to spend some time mastering the first two elements of emotional intelligence before I can work on self regulation. I do not know how I can stick to a path and make corrections to get back to it, until I have established a clear path. There were some interesting comments made about behaviors that help us get closer to our purpose. A reflective practice of checking in twice a day was brought up. I thought about how I might do this and I know that I would struggle with this significantly. I worry about how honest I would be with myself, so I would have to check in with my wife or a close friend that will keep honest with my feelings. I would have never thought that some kind of physical activity would help me get closer to my purpose. After hearing Mrs. McKnight talk about these practices I can see how it would help. A great example of a physical activity that can help you is the one Mrs. Enders gave on how posture and stance help the way people perceive you as a leader. I hunch over, it is mainly because I am tall and do not like being overly imposing to others. It is something that I can work on physically that might help me with my purpose. The examples of purpose statements that were given were amazing. I think that the statement ââ¬Å"I am a drop of water, flowing peacefully, showing love carving deep canyons out of graniteâ⬠was an insightful statement. I think this will stay with me for a long time not because of how insightful I found it but because of the story that went with it. The fact that the CEO was able to recognize that he was not following his statement and quit his job in order to find a path back to it, was very inspirational. I want to have that kind of courage and belief in my purpose statement and I will think of this story heavily, while I am creating it. After watching this interview a few times in preparation for this paper, it really helped me get a grasp on the concept of a leadership purpose statement. This interview has given me a good set of tools for not only creating a good purpose statement, but knowing how to stay true to it, and knowing how to deal with obstacles I will face while trying to live by it. By taking the time to reflect on this interview I started to learn more about a subject I have not spent much time on; Myself.
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