Graphene: Development and Applications

Graphene: Development and Applications Number of carbon atoms packed in a two-dimensional (2D) grid cells as flat single layer give the graphene. This is a key building block for graphitic materials of all sizes. It can be enclosed in fullerenes (0D), rolled into 1D nanotubes or stacked into three dimensional graphite. A serious step forward in the study of graphene was when Andre Geim and Kostya Novoselov from Manchester extracted Singlet thick crystallites (graphene) from crude graphite in 2004. The unique electronic properties of graphene produce an unexpectedly high opacity for one atomic monolayer, with amazingly simple value : it absorbs ~ 2.3 % of white light . This is a consequence of the unusually low energy electronic structure of monolayer graphene saws which electrons and holes tapered zone which meet each other at the point Dirac which is qualitatively different from the more common solid square zones. In 2008 carried out the first experiment proves that graphene is the strongest material that exists in nature. The measurements showed that graphene has a tensile strength of 100 times greater than steel. Graphene is different from most conventional 3D materials. The natural Graphene presents a semimetal or zero-gap semiconductor. Been a long time since we talked through the Medgreece in graphene and its unique properties. Graphene is a material which was discovered relatively recently, and its main feature is that it is a graphite sheet consisting of a lattice of carbon atoms linked together as shown in the photo of the article ( we could characterize as a wire ) which has a thickness of a single atom . So far it has been described as the ideal replacement for silicon , and has a very low resistance and higher conductivity which can lead to the creation of faster chips for computers . And all at room temperature . Where else could however be used graphene ? From the University of California , and Alexander Balandin (Chair of Materials Science and Engineering), investigated the possibility of using graphene sheets as heat conductors . The researchers call these cards quilts ( like a quilt ) and that is because the graphene sheets are not homogeneous but consist of flakes graphene , which overlap creating a spreadsheet. Only unlike the quilt ( we all know ) the quilt of graphene flakes will not retain heat, but will remove it . The graphene sheets can be used to extract heat from parts of a circuit which, due to the high speed flow of electrons ( current) particularly heated , which leads to impaired function of the circuit. Helping the diffusion of that heat , graphene will help create sdti much faster chip . Graphene based on measurements made à ¢Ã¢â€š ¬Ã¢â‚¬ ¹Ãƒ ¢Ã¢â€š ¬Ã¢â‚¬ ¹by the researchers shows remarkably high thermal conductivity that surpasses even that of diamond and carbon nanotubes. The properties of graphene , (electrical conductivity , low resistance , high thermal conductivity ) find no scope only chip electronic circuits. As we mentioned previously this technology could even be used to improve the photovoltaic , since one of the main problems (in terms of performance ) is the high resistance of the conductor carrying the current. Graphene thanks to its properties , could significantly increase their performance Chapter 1: Carbon Nanostructures 1.1 A new class of materials The two-dimensional (2D) crystalline materials have only recently been identified and investigated. [1] The first material that falls into this category, is graphene, a singlet carbon layer. This new material has unique properties that make it extremely interesting both as basic knowledge, as well as for future applications. The electronic properties of graphene, for example, have resulted in an unusual quantum Hall [2], [3]. It is a transparent conductor [4] with a thickness equal to the extent of zp orbital of an atom of carbon (0,344 nm). It also has parallels with the physics of elementary particles which for example displays an unusual tunneling [5], [6], which was predicted by the Swedish Natural Oscar Klein [7]. Additionally, graphene exhibits excellent mechanical and electrical properties. Its mechanical strength is greater than steel while it can be bent. The thermal and electrical conductivity is very high and can be used as a flexible conduit. The Andre K. Geim and Kostant in S. Novoselov from the University of Manchester, were awarded the 2010 Nobel Prize for the production, isolation and identification of graphene [1]. 1.2 Forms of carbon Carbon is perhaps the most exciting element of the periodic table. It is the basis of DNA and life on earth. O coal occurs in different forms. The most common form of carbon, graphite, which consists of stacked sheet carbonates hexagonal structure. At high pressures, the diamond is created, which is a metastable form of carbon. A relatively new form of molecular carbon, are the Fullerenes (Fullerenes) [8]. The most ordinary fullerene consists of 60 carbon atoms (60 C) and has the shape of a football. It is consisting of 20 hexagons and 12 pentagons which enable the surface to form a ball. The discovery of fullerenes was awarded the Nobel Prize in Chemistry in 1996. The existence of a pseudo-one-dimensional form of carbon, carbon nanotubes, has been known for many decades and the existence of single-wall carbon nanotubes in 1993 [9]. The nanotubes are formed by winding of a graphene sheet so as to acquire a cylindrical shape with hemispherical ends with a configuration similar to that of the fullerene. The electronic and mechanical properties of metallic nanotubes, show many similarities with those of graphene. It was already known that the toner is composed of hexagonal carbon levels which are stacked on top of one another but scientists believed that such a singlet carbonate sheet could not be produced. In 2004, however, scientists A. Geim, K. Novoselov and colleagues [1] showed that such an individual could be isolated and was stable. The singlet this level carbon called graphene. Figure 1.1. The graphene sheets form the native structure of the graphite, carbon nanotubes and fullerenes [11]. It should be noted that structures similar to graphene has been known since the 1960s [10] but there were experimental difficulties in isolating them and raises doubts about whether this would be possible. The amazing thing is that a simple pencil contains graphite and as it moves the paper, toner levels separated in a very small part of which contains some of singlet layers of graphite, ie graphene. The difficulty is not the production of graphene structures but rather to isolate large quantities of singlet levels for the identification, characterization and study its properties. This just managed to make the Geim and Novoselov. 1.3 Graphene Graphene is called a singlet level of carbon atoms arranged in a hexagonal lattice, with nearest neighbor distance of atoms 0.142 nm. It is the first truly two-dimensional crystalline material and is representative of a whole class of two-dimensional materials which includes for example Psychosocial Critical Evaluation: Case Study of Rory Psychosocial Critical Evaluation: Case Study of Rory Psychosocial Critical Evaluation: Case Study of Rory Introduction Psychosocial theory originates from psychoanalytic and psychodynamic casework, which has had a profound and lasting impact on social work (Kenny and Kenny, 2000). This assignment will use the case study of Rory, a fifteen year old boy living in a family home with his brother, mother and stepmother. Throughout the assignment Rory’s social environment and his relationships within this environment will be analysed in order to understand how these factors have shaped his development. Following on from this an evaluation of group work as an intervention method to support and empower Rory shall be explored. Group work will be taken as evidence for practice, where social work practice is carried out in groups (Doel, 2000, p.148). Psychosocial theories will be explored into how they influence group work and group dynamics, and the way group work can be used to change and adjust dysfunctional social environments. In doing so, the model of psychosocial theory and its relevance to social work will be explored, and how useful it is in understanding clients and promoting their best interests. In order to critique the model of psychosocial theory, and explore how it influences our perception of the human condition, we must have a clear idea of what we mean by the term. Modern social work theorists have stressed the importance of applying the correct competency to the individual person, with regard to their social environment (Hutchinson, 2008). It sees people as ‘products of the interaction among their biogenetic endowment, the effects of significant relationships, the impact of life experiences, and their participation in societal, cultural and current events’ (Turner, 1978, p.2). The social work profession, can see the individual person as interdependent with their environment, which they are able to influence and change (Kondrat, 2002). By seeing individuals as being uniquely shaped by their environment, it helps social workers avoid the issues of social identity theory. Rather than categorising or stereotyping people, social workers are able to empathise a nd see all service users as individuals (Tajfel and Turner, 1979, cited in Gaine, 2010). The main ideas of psychosocial theory are reflected in other social work theories and methods, such as systems and attachment theory. Both theories developed from the need to build upon the traditional psychoanalytic model of individual therapy (Walker, 2012), and the idea that individual experiences with families were continually being shaped and influenced by the evolving interaction patterns of communication. For group work to be beneficial there must be a mindfulness of the social context or sociology of the individual and group. Understanding individuals who compromise the group requires knowledge of ‘psychosocial functioning and development through the life cycle’ but also the impact of the group’s structure and process on the members’ behaviour. A group cannot be understood without knowledge of members in their individual social context (Northern and Kurland, 2001, p.35). This promotes and encourages diversity within the group, as practitioners are mindful of differences within the group, and how they can be addressed to promote social skills such as empathy and respect. If a client’s environment and social context has been dysfunctional, as in Rory’s case, the group work can provide a model of a healthy culture through the group values, communication patterns, and the way it addresses interpersonal conflict (Northern and Kurland, 2001). Having explored the connection between group work and psychosocial theory, two theories of social work shall be applied and explored next. Attachment theory focuses on the quality of the attachments in the significant relationships in a client’s past (Bowlby, 1979, 1988). Bowlby’s theory of attachment stresses the importance of past relationships by determining which will develop emotionally and socially, and form relationships in the future. Bowlby was particularly concerned with the interactions and attachments that individuals had with their parents or carers. The ability of a child to attach to a parent or carer, the level of consistency of the parent or carer to meet the emotional needs of a child and the ability of the child to feel safe and secure, predicted how the child would develop emotionally. This theory has particular relevance and importance for this case study. The relationship between Rory and his mother can be recognised as a disorganised attachment. H is mother’s bi-polar disorder means her behaviour is inconsistent at times, due to her having stable periods but when her mood is very bleak she neglects the needs of Rory and his brother. From this behaviour Rory receives mixed messages, leaving him feeling anxious and unable to explain and possibly understand his own feelings (Bowlby, 1988). His father appears to display as insecure or ambivalent attachment, this is due to him demonstrating an inconsistency in his attitude to Rory, neglecting contact for several weeks at a time. His unpredictable behaviour and failure to display attention in a consistent way leads to anxiety and distress for Rory. Attachment theory is helpful to social workers in planning intervention, as they have insight into how past experiences of the service user can impact on their behaviour, and their ability to form relationships. For example, at the Youth Club Rory is seen as increasingly withdrawn and erratic by the youth workers. This may be due to his disorganised attachments impacting upon his ability to behave in social situations. Preston-Shoot and Agass (1990) explains that the development and quality of relationships can be influenced by considering the impact of the client’s feelings on behaviours. Group work can be a powerful tool when based on attachment theory issues. Egeland and Erikson (1993) and Eriskon et al., (1992) described a group in which young, high-risk mothers were brought together for weekly group sessions from the time their children were born until they were one year old. Group work was effective here for two reasons. Firstly, through the therapeutic relationship itself, or the relationship with the group facilitator, in which ‘the facilitator maintains a healthy, supportive alliance with the parent, proving such relationships are possible’ (Erikson et al., 1992, p.501). When using any intervention, it is important to create a working alliance, in which the patient has confidence that the practitioner can help (Holmes, 2001). Due to Rory having all his immediate adult relationships in his life being inconsistent and causing him anxiety, having another which proves to be consistent in his life, one that is dependable, may improve his self-esteem an d address problems he is exhibiting in social situations, such as at the Youth Club. The reason he may be attending the Youth Club could be due to him searching for that consistency and dependable person he needs, as the Youth Club is a weekly activity which is always there. The ‘therapeutic’ relationship gives Rory a ‘secure base’ (Holmes, 2001, p.17) where the task can challenge assumptions and relationship patterns. Group work would also introduce Rory to a plethora of perspectives and individuals. Through this, Rory may become conscious of thoughts and attitudes that were previously unconscious (Holmes, 2001). In listening to and working with others Rory may build up his self-esteem. As he begins to form relationships with members of the group, he has models of healthy and functional relationships that are different from his own attachments with family members. This could increase his confidence, addressing problems of withdrawn and erratic behaviour that have been raised by Youth Workers at Youth Club. A number of studies have shown group work can improve social skills (Reid and Hammond, 2001; Fargan and Jones, 2002). Group work also promotes diversity as those it helps do not feel isolated or alienated by their problems: through sharing experiences in a respectful and tolerant environment they gain insight into the sufferings and challenges of others, and methods to overcome this. Groupwork a s a form of learning extends beyond this, as groups offer members feedback that is often more effective coming from peers than from a social worker (Northern and Kurland, 2001). When done sensitively and constructively, such feedback helps clients such as Rory with their social skills and their ability to build relationships outside of the group. A weakness of this theory, however, may that does it is not sufficiently encompassing of all the social forces that act on the individual. Psychosocial theory holds that we should acknowledge the role in human development of temperament, racism, poverty, social class, and other environmental conditions (criticism outlined in Coady and Lehman, 2007). Group dynamics and interactions cannot be understood through individual’s relationships with their parents alone. Psychosocial theory assists social workers in understanding and analysing the situations and behaviours of their client. This provides practitioners with insight into what has occurred in the past or what may occur in the future. However, some argue that attachment theory does not paint a picture of the client whole: by attributing all of Rory’s behaviours and concerns to his parents, the practitioner may neglect the wider social context that is acting on him. Systems theory may offer a more encompassing picture of Rory’s social context. This theory holds that individuals and their environments are separate systems that are interconnected and interdependent (Teater, 2010). By thinking of families as living systems, systems theories are able to think about how dynamics are constantly altering as each family member deals with life inside and outside the family. Rory’s withdrawn behaviour, and self-destructive thoughts can be attributed to the frequency with which his family dynamics change. This change is at times dramatic for example the breakdown of his parent’s relationship, or his sister leaving the family home- but also in the inconsistencies due to his stepfather’s temper and mother’s mental illness. Systems theory also promotes tolerance and diversity, as it recognises that there is no one model for a healthy, functioning family (Walker, 2012). A change or movement in one of these systems results in change or movement in the others. In Rory’s case, social systems theory is useful as it allows social workers to identify which system requires an intervention (Teater, 2010). The key question is ‘does this structure work for this family’ and does it allow for the healthy development and growth of family members? As such, the Munro Report confirms that a systems perspective offers the most holistic tool for undertaking informed assessment work that takes into full account the wide environmental factors combined with the inter-personal relationship patterns that influence family experiences (cited in Walker, 2012). Furthermore, a family’s structure and organisation allows social workers to determine, to some extent what is possible within a particular family. Thinking of families systematically also ensures no family member is marginalised (Walker, 2012). One-to-one intervention with Rory will have an i mpact on the whole family system; his mother, brother and stepfather will be affected, and also the family dynamic as a whole. As such, group work is an effective method of intervention according to social systems theory. This is because it avoids the risk that the family’s problems and their solutions are individualised. By placing Rory in a different group dynamic, one that has been constructed by a facilitator or practitioner, social workers may be able to assess which elements of the family’s structure need intervention, and where Rory and the family need extra support. By assessing Rory’s patterns of communication and interaction outside his family dynamic, practitioners may gain greater insight into his specific needs and methods that can be used to support and empower him. Groupwork for families links closely to the family therapy movement (pioneered by figures such as Murray Bowen, Jay Haley, and Virginia Satir). The family therapy movement advocates systemic features as a means by which to assess the way groups of relatives organise themselves over time, creating stable patterns, that are inclined to return to familiar states. As such, one of the beliefs is that systems tend to be self-correcting, based on positive or negative feedback (Coady and Lehmen, 2007). By using groupwork intervention with Rory, he may feel empowered and supported to address and correct the patterns and familiar states of his family, rather than simply removing himself from situations. Furthermore, the counsellor or practitioner can address the dysfunctional and destructive subsystems that exist within Rory’s family. A concern surrounding this theory of social work, however, is the emphasis social systems theory places on adaptation. The purpose of the group work intervention is to explore how systems can be adjusted and change to create a healthy and supportive structure. As such, some fear that practitioners are encouraging clients to accommodate to oppressive circumstances (Coady and Lehmen, 2007). From this perspective, Rory may be being taught to accept and adapt to the hostile and threatening behaviour of his stepfather, or the neglect he sometimes faces from his mother. This can be addressed by being mindful of social work’s traditional concern with social justice- an integration of values such as social justice and social systems based thinking is possible. To do this, practitioners must be self-reflective and question their own values and assumptions, particularly in terms of prejudice and diversity, in order to ensure that the client’s best interests are at the heart of gr oup work intervention. An awareness of social circumstance is also important in tackling diversity with regard to mental health. Parental mental health, and the disruption to parenting capacity has been found to have profound and persistent implications for children and their parents (Smith, 2004). As such, it has been advocated that social workers have improved access to training that assists with psychosocial interventions, such as group work (National Institute for Mental Health in England, 2005). This helps us to understand the quality of attachment between Rory and his mother. Rory himself is displaying behaviours that may point to mental health, particularly disclosing suicidal thoughts. Research shows that social work plays a significant role of social work in promoting the involvement of people using services and developing systemic approaches to practice with families (Gilbert, 2007). Diversity is important here- social workers must address societal stigmas regarding mental health. Effective inter vention can also promote diversity by helping those with mental health to function and become involved in society. A psychosocial approach helps us to understand Rory’s patterns of communication and behaviour, as it gives us insight into the formative relationships, experiences and environments that have categorised his life thus far. This puts troubling behaviours, such as self-destructive and suicidal thoughts, within a social context that can be used as the basis for assessment and intervention. Our chosen intervention method, group work, is also revealing about how Rory can be supported and empowered. By modelling healthy and secure relationships, and developing Rory’s social skills, Rory’s future relationships do not have to be influenced solely by dysfunctional attachments with his parents and stepfather. By understanding his family as a system, and observing Rory but within that system and in other groups, insight is gained into how Rory’s social context can be adapted in order to promote the healthy growth of all its members.

Lab 5 Cellular Respiration

Lab 5Cellular Respiration Introduction: Cellular respiration is an ATP-producing catabolic process in which the ultimate electron acceptor is an inorganic molecule, such as oxygen. It is the release of energy from organic compounds by metabolic chemical oxidation in the mitochondria within each cell. Carbohydrates, proteins, and fats can all be metabolized as fuel, but cellular respiration is most often described as the oxidation of glucose, as follows: C6H12O6 + 6O2 > 6CO2 + 6H2O + 686 kilocalories of energy/mole of glucose oxidized Cellular respiration involves glycolysis, the Krebs cycle, and the electron transport chain.Glycolysis is a catabolic pathway that occurs in the cytosol and partially oxidizes glucose into twopyruvate (3-C). The Krebs cycle is also a catabolic pathway that occurs in the mitochondrial matrix and completes glucose oxidation by breaking down apyruvate derivative (Acetyl-CoA) into carbon dioxide. These two cycles both produce a small amount of ATP by substra te-level phosphorylation and NADH by transferring electrons from substrate to NAD+ (Krebs cycle also produces FADH2 by transferring electrons to FAD).The electron transport chain is located at the inner membrane of the mitochondrion, accepts energized electrons from reduced coenzymes that are harvested during glycolysis and Krebs cycle, and couples this exergonic slide of electrons to ATP synthesis or oxidative phosphorylation. This process produces 90% of the ATP. Cells respond to changing metabolic needs by controlling reaction rates. Anabolic pathways are switched off when their products are in ample supply. The most common mechanism of control is feedback inhibition.Catabolic pathways, such as glycolysis and the Krebs cycle, are controlled by regulating enzyme activity at strategic points. A key control point of catabolism is the third step of glycolysis, which is catalyzed by an allosteric enzyme, phosphofructokinase. The ratio of ATP to ADP and AMP reflects the energy status o f the cell, and phosphofructokinase is sensitive to changes in this ratio. Citrate and ATP are allosteric inhibitors of phosphofructokinase, so when their concentration rise, the enzyme slows glycolysis.As the rate of glycolysis slows, the Krebs cycle also slows since the supply of Acetyl-CoA is reduced. This synchronizes the rates of glycolysis and the Krebs cycle. ADP and AMP are allosteric activators for phosphofructokinase, so when their concentrations relative to ATP rise, the enzyme speeds up glycolysis, which speeds of the Krebs cycle. Cellular respiration is measure in three manners: the consumption of O2 (how many moles of O2 are consumed in cellular respiration? ), production of CO2 (how many moles of CO2 are produced in cellular respiration? , and the release of energy during cellular respiration. PV = nRT is the formula for the inert gas law, where P is the pressure of the gas, V is the volume of the gas, n is the number of molecules of gas, R is the gas constant, and T is the temperature of the gas in degrees K. This law implies several important things about gases. If temperature and pressure are kept constant then the volume of the gas is directly proportional to the number of molecules of the gas. If the temperature and volume remain constant, then the pressure of the gas changes in direct proportion to the number of molecules of gas.If the number of gas molecules and the temperature remain constant, then the pressure is inversely proportional to the volume. If the temperature changes and the number of gas molecules is kept constant, then either pressure or volume or both will change in direct proportion to the temperature. Hypothesis: The respirometer with only germinating peas will consume the largest amount of oxygen and will convert the largest amount of CO2 into K2CO3 than the respirometers with beads and dry peas and with beads alone.The temperature of the water baths directly effects the rate of oxygen consumption by the contents in the respirometers (the higher the temperature, the higher the rate of consumption). Materials: The following materials are necessary for the lab: 2 thermometers, 2 shallow baths, tap water, ice, paper towels, masking tape, germinating peas, non-germinating (dry) peas, glass beads, 100 mL graduated cylinder, 6 vials, 6 rubber stoppers, absorbent and non- absorbent cotton, KOH, a 5-mL pipette, silicon glue, paper, pencil, a timer, and 6 washers. Procedure:Prepare a room temperature and a 10oC water bath. Time to adjust the temperature of each bath will be necessary. Add ice cubes to one bath until the desired temperature of 10oC is obtained. Fill a 100 mL graduated cylinder with 50 mL of water. Add 25 germinating peas and determine the amount of water that is displaced. Record this volume of the 25 germinating peas, then remove the peas and place them on a paper towel. They will be used for respirometer 1. Next, refill the graduated cylinder with 50 mL of water and add 25 non-germinating peas to it.Add glass beads to the graduated cylinder until the volume is equivalent to that of the expanded germinating peas. Remove the beads and peas and place on a paper towel. They will be used in respirometer 2. Now, refill the graduated cylinder with 50 mL of water. Determine how many glass beads would be required to attain a volume that is equivalent to that of the germinating peas. Remove the beads. They will be used in respirometer 3. Then repeat the procedures used above to prepare a second set of germinating peas, dry peas and beads, and beads to be used in respirometers 4,5,and 6.Assemble the six respirometers by obtaining 6 vials, each with an attached stopper and pipette. Then place a small wad of absorbent cotton in the bottom of each vial and, using the pipette or syringe, saturate the cotton with 15 % KOH. Be sure not to get the KOH on the sides of the respirometer. Then place a small wad of non- absorbent cotton on top of the KOH-soaked absorbent cotton. Repeat the se steps to make the other five respirometers. It is important to use about the same amount of cotton and KOH in each vial. Next, place the first set of germinating peas, dry peas and beads and beads alone in vials 1,2, and 3.Place the second set of germinating peas, dry peas and beads, and glass beads in vials 4,5, and 6. Insert the stoppers in each vial with the proper pipette. Place a washer on each of the pipettes to be used as a weight. Make a sling using masking tape and attach it to each side of the water baths to hold the pipettes out of the water during the equilibration period of 10 minutes. Vials 1,2, and 3 should be in the bath containing water at room temperature. Vials 4, 5, and 6 should be in the bath containing water that is 10oC. After the equilibration period, immerse all six respirometers into the water completely.Water will enter the pipette for a short distance and stop. If the water does not stop, there is a leak. Make sure the pipettes are facing a direction f rom where you can read them. The vials should not be shifted during the experiment and your hands should not be placed in the water during the experiment. Allow the respirometers to equilibrate for three more minutes and then record the initial water reading in each pipette at time 0. Check the temperature in both baths and record the data. Every five minutes for 20 minutes take readings of the water’s position in each pipette, and record.Results: In this activity, you are investigating both the effects of germination versus non-germination and warm temperature versus cold temperature on respiration rate. Identify the hypothesis being tested on this activity. The rate of cellular respiration is higher in the germinating peas in cold than in the beads or non-germinating peas; the cooler temperature in the cold water baths slows the process of cellular respiration in the both germinating and non-germinating peas. This activity uses a number of controls. Identify at least three of the controls, and describe the purpose of each.The constant temperature in the water baths yielding stable readings, the unvarying volume of KOH from vial to vial leading to equal amounts of carbon dioxide consumption, identical equilibration periods for all the respirometers, precise time intervals between measurements, and glass beads acting as a control for barometric pressure all served as controls. Describe and explain the relationship between the amount of oxygen consumed and time. There was a constant, gradual incline in the amount of oxygen consumed over precise passage of time.Why is it necessary to correct the readings from the peas with the readings from the beads? The beads served as a control variable, therefore, the beads experienced no change in gas volume. Explain the effects of germination (versus non-germination) on pea seed respiration. The germinating seeds have a higher metabolic rate and needed more oxygen for growth and survival. The non-germinating peas, t hough alive, needed to consume far less oxygen for continued subsistence. Above is a sample graph of possible data obtained for oxygen consumption by germinating peas up to about 8oC. Draw in predicted results through 45oC.Explain your prediction. Once the temperature reached a certain point, the enzymes necessary for cellular respiration denatured and germination (and large amounts of oxygen consumption) was inhibited. What is the purpose of KOH in this experiment? The KOH drops absorbed the carbon dioxide and caused it to precipitate at the bottom of the vial and no longer able to effect the readings. Why did the vial have to be completely sealed under the stopper? The stopper at the top of the vial had to be completely sealed so that no gas could leak out of the vial and no water would be allowed into the vial.If you used the same experimental design to compare the rates of respiration of a 35g mammal at 10oC, what results would you expect? Explain your reasoning. Respiration wou ld be higher in the mammal since they are warm-blooded and endothermic. If respiration in a small mammal were studied at both room temperature (21oC) and 10oC, what results would you predict? Explain your reasoning. Respiration would be higher at 21 degrees because it would be necessary for the animal to maintain a higher body temperature.The results would proliferate at 10 degrees because the mammal would be required to retain its body temperature at an even lower temperature in comparison to room temperature. Explain why water moved into the respirometer pipettes. While the peas underwent cellular respiration, they consumed oxygen and released carbon dioxide, which reacted with the KOH in the vial, resulting in a decrease of gas in the pipette. The water moved into the pipette because the vial and pipette were completely submerged into the bath. Design an experiment to examine the rates of cellular respiration in peas that have been germinating for 0, 24, 48, and 72 hours.What res ults would you expect? Why? Respirometers could be set up with respirometer 1 containing non-germinating peas, respirometer 2 holding peas that have been germinating 24 hours, 3 would contain the peas that germinated 48 hours, and 4 would hold the peas that germinated 72 hours. All the respirometers should have the KOH added to the bottom in the same manner as in lab described earlier. The respirometers should be placed in baths with the same temperature for all the respirometers. The seeds that have not begun germination would consume very little oxygen.The peas that have been germinating for 72 hours will have the greatest amount of oxygen consumption, while the other two samples will consume a medium (in comparison to respirometers 1 and 4 results) amount of oxygen. Error Analysis: Numerous errors could have occurred throughout the lab. The temperature of the baths may have been allowed to fluctuate, the amounts of peas, beads, KOH, and cotton may have varied from vial to vial da maging the results, and these problems would have occurred only during set up. Air may have been allowed to creep into the vial via a leaky stopper or poorly sealed pipette.Timing for the equilibration of the respirometers and the five-minute time intervals may have been erroneous. It was somewhat difficult to read the markings on the pipettes and so errors are always likely. Mathematical inaccuracies may have taken place when filling out the table and finding the corrected difference by using the formula provided. Discussion and Conclusion: The lab and the results gained from this lab demonstrated many important things relating to cellular respiration. It showed that the rates of cellular respiration are greater in germinating peas than in non- germinating peas.It also showed that temperature and respiration rates are directly proportional; as temperature increases, respiration rates increase as well. Because of this fact, the peas contained by the respirometers placed in the water at 10oC carried on cellular respiration at a lower rate than the peas in respirometers placed in the room temperature water. The non-germinating peas consumed far less oxygen than the germinating peas. This is because, though germinating and non-germinating peas are both alive, germinating peas require a larger amount of oxygen to be consumed so that the seed will continue to grow and survive.In the lab, CO2 made during cellular respiration was removed by the potassium hydroxide (KOH) and created potassium carbonate (K2CO3). It was necessary that the carbon dioxide be removed so that the change in the volume of gas in the respirometer was directly proportional to the amount of oxygen that was consumed. In the experiment water will moved toward the region of lower pressure. During respiration, oxygen will be consumed and its volume will be reduced to a solid. The result was a decrease in gas volume within the tube, and a related decrease in pressure in the tube.The respirometer with just the glass beads served as a control, allowing changes in volume due to changes in atmospheric pressure and/or temperature. This activity uses a number of controls. Identify at least three of the controls, and describe the purpose of each. The constant temperature in the water baths yielding stable readings, the unvarying volume of KOH from vial to vial leading to equal amounts of carbon dioxide consumption, identical equilibration periods for all the respirometers, precise time intervals between measurements, and glass beads acting as a control for barometric pressure all served as controls.Describe and explain the relationship between the amount of oxygen consumed and time. There was a constant, gradual incline in the amount of oxygen consumed over precise passage of time. Condition Calculations Rate in mL O2/ minute Germinating Peas/ 10oC (1. 40-1. 38) 20 min. .001 Germinating Peas/ 20oC (1. 35-. 57) 20 min. .040 Dry Peas/ 10oC (1. 40-1. 38) 20 min. .001 Dry Peas/ 20oC (1. 4 7-1. 42) 20 min. .003 Why is it necessary to correct the readings from the peas with the readings from the beads? The beads served as a control variable, therefore, the beads experienced no change in gas volume.Explain the effects of germination (versus non-germination) on pea seed respiration. The germinating seeds have a higher metabolic rate and needed more oxygen for growth and survival. The non-germinating peas, though alive, needed to consume far less oxygen for continued subsistence. Above is a sample graph of possible data obtained for oxygen consumption by germinating peas up to about 8oC. Draw in predicted results through 45oC. Explain your prediction. Once the temperature reached a certain point, the enzymes necessary for cellular respiration denatured and germination (and large amounts of oxygen consumption) was inhibited.What is the purpose of KOH in this experiment? The KOH drops absorbed the carbon dioxide and caused it to precipitate at the bottom of the vial and no longer able to effect the readings. Why did the vial have to be completely sealed under the stopper? The stopper at the top of the vial had to be completely sealed so that no gas could leak out of the vial and no water would be allowed into the vial. If you used the same experimental design to compare the rates of respiration of a 35g mammal at 10oC, what results would you expect? Explain your reasoning. Respiration would be higher in the mammal since they are warm-blooded and endothermic.If respiration in a small mammal were studied at both room temperature (21oC) and 10oC, what results would you predict? Explain your reasoning. Respiration would be higher at 21 degrees because it would be necessary for the animal to maintain a higher body temperature. The results would proliferate at 10 degrees because the mammal would be required to retain its body temperature at an even lower temperature in comparison to room temperature. Explain why water moved into the respirometer pipettes. W hile the peas underwent cellular respiration, they consumed oxygen and released carbon dioxide, which reacted with the KOH in he vial, resulting in a decrease of gas in the pipette. The water moved into the pipette because the vial and pipette were completely submerged into the bath. Design an experiment to examine the rates of cellular respiration in peas that have been germinating for 0, 24, 48, and 72 hours. What results would you expect? Why? Respirometers could be set up with respirometer 1 containing non-germinating peas, respirometer 2 holding peas that have been germinating 24 hours, 3 would contain the peas that germinated 48 hours, and 4 would hold the peas that germinated 72 hours.All the respirometers should have the KOH added to the bottom in the same manner as in lab described earlier. The respirometers should be placed in baths with the same temperature for all the respirometers. The seeds that have not begun germination would consume very little oxygen. The peas that have been germinating for 72 hours will have the greatest amount of oxygen consumption, while the other two samples will consume a medium (in comparison to respirometers 1 and 4 results) amount of oxygen. Error Analysis: Numerous errors could have occurred throughout the lab.The temperature of the baths may have been allowed to fluctuate, the amounts of peas, beads, KOH, and cotton may have varied from vial to vial damaging the results, and these problems would have occurred only during set up. Air may have been allowed to creep into the vial via a leaky stopper or poorly sealed pipette. Timing for the equilibration of the respirometers and the five-minute time intervals may have been erroneous. It was somewhat difficult to read the markings on the pipettes and so errors are always likely.Mathematical inaccuracies may have taken place when filling out the table and finding the corrected difference by using the formula provided. Discussion and Conclusion: The lab and the results gai ned from this lab demonstrated many important things relating to cellular respiration. It showed that the rates of cellular respiration are greater in germinating peas than in non- germinating peas. It also showed that temperature and respiration rates are directly proportional; as temperature increases, respiration rates increase as well.Because of this fact, the peas contained by the respirometers placed in the water at 10oC carried on cellular respiration at a lower rate than the peas in respirometers placed in the room temperature water. The non-germinating peas consumed far less oxygen than the germinating peas. This is because, though germinating and non-germinating peas are both alive, germinating peas require a larger amount of oxygen to be consumed so that the seed will continue to grow and survive. In the lab, CO2 made during cellular respiration was removed by the potassium hydroxide (KOH) and created potassium carbonate (K2CO3).It was necessary that the carbon dioxide be removed so that the change in the volume of gas in the respirometer was directly proportional to the amount of oxygen that was consumed. In the experiment water will moved toward the region of lower pressure. During respiration, oxygen will be consumed and its volume will be reduced to a solid. The result was a decrease in gas volume within the tube, and a related decrease in pressure in the tube. The respirometer with just the glass beads served as a control, allowing changes in volume due to changes in atmospheric pressure and/or temperature.

Federalism Paper Review

Wanna, J 2007, ‘Improving Federalism: Drivers for Change, Repair Options and Reform Scenarios’, Australian Journal of Public Administration, vol. 66, no. 3, pp. 275 – 279. | Purpose The author aims to present an overview of the proceedings from a roundtable discussion on federalism. The paper aims to inform readers of the views of participants by reporting on discussion points on the subject of improving federalism, through consideration of issues and challenges and options for reform. The author contrasts the different federalism characteristics discussed. Confused and competitive interactions occur between federal, state and local government with attendant impacts on service delivery. In particular much of the dysfunction in the current system stems from uncertainty around roles and an argumentative approach to dividing resources and defining responsibility. Federalism was in long term decline and a product of changing market forces from national and international pressure and global communication reducing regional identify. Overlapping policy interaction and involvement of the tiers of government was presented as an impediment to effective delineation of roles. Federalism provided greater accountability through increased scrutiny by multiple government and review of achievements particularly in contentious areas. Participants agreed federalism would be improved by gradual change. The author discussed the idea change should focus on advancing the current situation rather than whole-scale reform through a new paradigm of strategic pragmatism. The group considered that fiscal issues drive a shift to centralism. Improving federalism requires better relations, through increased clarity of roles and responsibilities and levels of trust, possibly formalised through agreements and structural rationalisation. Evidence The paper presents findings as observations from discussions initially. The author introduces uncited references and discusses external and personal views. The discussion of participants views are not quantified specifically and references are made to ‘most’, ‘many thought’, ‘those who believed’. The origin of sources is unclear. For example ‘some commentators’ is unclear as to whether these were participants or external views. Summarised statements appeared to be discussions of the participants merged with personal opinion. | Page 275, 276 and 277. Page 276Pages 275 – 277Page 276Page 278| Observations The author initially expresses an observational account of the proceedings of the meeting in a neutral manner. This approach gradually transitions into an academic piece that draws on the author’s extensive understanding of the field and his personal views together with unreferenced discussion of academic positions. The paper is confusing at times and apparently aims to presents the outcomes and discussion points of a meeting initially but soon changes to uncited external examples, statements and personal opinion. Whilst the author references the panel’s deliberations and discussions, these are unquantified references to participant’s opinions and refer simply to ‘many’ or ‘most participants’. The author seems to have a bias toward a principled view of federalism with support for a fusion of pragmatic and principled approaches. The paper appears contradictory in parts. For example, an observation was made that there was a widely held view that roles and responsibilities needed to be specified. It was later stated that the ‘jury was still out’ on whether this was a worthwhile goal, which appeared to be a personal view rather than reporting on discussions. In concluding the author draws on a range of options for specific reform that were not introduced earlier in the paper.

Contribution of Islamic Civilization in Biotechnology - Free Essay Example

Sample details Pages: 3 Words: 787 Downloads: 9 Date added: 2019/10/10 Category Religion Essay Topics: Islam Essay Did you like this example? Muslim reflection on biotechnology are manifested by enormous divergences in the representations of reality that impact ethical deliberations. Due to the cultural and political diversity of Muslim civilizations around the globe, attain meaningful harmony is very tough. Certain key changes that Muslim ethical practices experience under pressures of rapid modernization and globalization, with its associated agonies, debates about biotechnology show the weakness of Muslim ethics from a variety of outlooks. Don’t waste time! Our writers will create an original "Contribution of Islamic Civilization in Biotechnology" essay for you Create order Islam is truly a system of life that represents the important sphere of connection with Allah, with the human beings along with other living organisms. The associations to be well reputable, three important axes of Islamic cores which highlighted are faith (tawheed), workshop (ibadah) and morality (akhlaq). These principles will balance and keep one’s moral and spiritual beliefs while continuing to strive on the path in which leads to Allah’s wish. Islamization of knowledge is a method which combines the ideologies of educational philosophy of Quranic science into the national education curriculum with the intention to integrate science and theological knowledge to upload the understanding and the civilization related to Islam. Science is an analysis, synthesis and philosophy of the universe. CONTRIBUTIONS In biotechnology faith is strictly linked to the question of religious principles, morals and ethics. This was further supported by that the humanitarian problems that frequently become a serious arguments between the scholars and scientists which contains human cloning, molecular biology and genetics. In the view of religion and law, human cloning is considered as a risk to social life and it will disturbs the personal organization as it is actually a effect of an asexual reproduction. According to the Islamic view based on creation, the formation of human embryo is the role of male and female cells in the practice of sexual relations which are confined or permitted to a legal marriage. Hence, offspring ancestry or family bond between the child and his parents is evidently recognized. Another negative outcome comprise a marriage that is no longer essential as a technological development in the modern world has generated new desire in the minds of most people specially among infertil e pair or the couples whose children died in dreadful accident. When human population is denied, humaneness will be demolished as human clones do not have a soul. Due to the inferences that cloning holds, Islam consider it as religious as well as ethical violation and thus such technology should not be practiced at all. International Islamic scholars exclude and act against all forms of human cloning and these include Said Ramadhan al-Buti, Abdul Aziz bin Baz, Dr. Wahbah al- Zuhayli, Dr. Gamal Serour , Dr. Muhammad Sayyid Tantain, Sheikh Muhammed bin Saleh al-Othimin, Dr.Nasr Farid Wasil, Dr. Muhammad Syaikh Mukthar al- Salami, Abd.al-Muhsin al-Turki, Suleiman Al-Ashqar. Certain Islamic groups and experts around the world which call for forbidding of human cloning. A sudden development in biotechnology has raised several problems and arguments on the Islamic legislation between Muslims all over the world. The results of new theories in biotechnology have always caused a problem whether they are right or wrong. Many findings are only based on the logical reasoning. Some of them are manipulating the outcomes by not revealing the real facts and truth. This unprincipled issue has been debated or raised up in the international conference on bio-etiquette held in Beirut. Numerous proposals have been highlighted in the conference to confirm the compatibility between biotechnology and value or moral of human kind such as: †¢ The significance must be given to the formation of a national committee to decide the role of culture in facing the challenges related to biotechnology. †¢ The necessity for the agreement to harmonize bio-etiquette with the local and national situations. †¢ Legislative mechanism and institutions are desired to regulate person’s greediness in biotechnological commerce. †¢ To improve plans in generating a consciousness associated to bio-etiquette, so that one make a choice based on correct information. Therefore, the integration between biotechnology and theology appears to be solves the problem by teaching the moral values and Islamic etiquette. SUMMARY The contribution of Islamic civilization in the field of biotechnology. Some people accepted the technologies were others are not accepting the new or modern technologies in related with the religion Islam. According to the Islamic religion, they will not agree with the artificial methods of reproduction that are done asexually such as human cloning, molecular biology, genetics etc. many Muslim scholars stay against the new artificial technologies developed in the case of reproduction. The civilization in the field of biotechnology faith is strictly linked to the question of spiritual beliefs, morals and ethics. The integration between biotechnology and theology appears to solve the problem by teaching the moral values and Islamic etiquette.