Immobilisation of Enzimes Essay -- Chemistry

Immobilization of enzymes is one of promising methods in enzymes performances enhancement, such as stability, recovery, and reusability. However, investigation of suitable solid support in enzyme immobilization is still the one of problems to prevent the reduction of enzymes activity. Polyethersulfone (PES) and aminated PES (PES-NH2) as novel materials for the immobilization were successfully synthesized. Structure of synthesized polymers were characterized by NMR, FTIR, and MALDI-TOF. The membranes based on PES and PES-NH2 with various pore sizes (from 10 to 600 nm) was fabricated to be applied as bioreactor to increase the immobilized lipase performances. The influences of pore sizes, concentration of additives, and the presence of functional groups on PES backbone toward enzyme loading and enzyme activities were studied. The largest enzyme loading was obtained by the immobilization of Mucor miehei onto PES-NH2 membrane composed of 10% of PES-NH2, 8% of DBP, and 5% of PEG (87 2.62 ï€  Ã¯  ­g/cm2). Activity of immobilized lipase was determined by hydrolysis reaction of pNPA and methanol to produce pNP which showed the hydrolysis reaction catalyzed by immobilized lipase onto synthesized PES (10%) membrane represented the highest enzyme activity value (568.48 mmol pNP min-1 cm-2). From the reusability test, the immobilized lipase onto PES-NH2 showed better constancy than the immobilized lipase onto PES by four times of reactions which indicated that this novel material is potential to be developed as bioreactor on enzymatic reaction. Keywords: Aminated PES, solid support, Mucor miehei, enzymatic reaction, lipase immobilization 1. Introduction Lipase, also known as triacylglycerol ester hydrolase (EC3.1.1.3), is one of inter... ...ovic, Appl. Microbiol. Biotechol. 49 (1998), 267-271. [23] L. Giorno, E. Drioli, TIBTECH 18 (2000) 339-349. [24] S.C. Stamatoglou and J.M. Keller, The Journal of Cell Biology, 96 (1983) 1820-1823. [25] M.G.Wolf, M. Hoefling, C.A. Santamaria, H. Grupmuller, G. Groenhof, Journal of Computational Chem. 31 (2010) 2169-2174 [26] T. Tosa, T. Mori, N. Fuse, I. Chibata, Biotechnology and Bioengineering. 9 (1967) 603-615 [27] L.A. Nelson, T.A. Foglia, W.N. Marmer, JAOCS, 73 (1996) 1191-1195. [28] G. Pozinak, B. Krajewska, and W. Trochimczuk, Biomaterials, 16 (1995) 129-134. [29] M.T. Sho, F. R. Eirich, H. Strathmann, and R. W. Baker, Journal of Polymer Science: Polymer Letters Edition, 11 (1973) 201-205. [30] D.S. Marsman, NTP Toxicity Report, 30 (1995) 5-93. [31] N. Handayani, N. Miletic, K. Loos, S. Achmad, and D. Wahyuningrum, Sains Malaysiana, 40 (2011) 965-972.

Education in the Classroom, or in the Real World

Oscar Wilde and Lord Brougham have different ideas about the education system. Wilde states â€Å"Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught. † This means that education does not teach a person every thing they need to know, a person learns from doing things outside of school. Lord Brougham says â€Å"Education makes a people easy to lead, but difficult to drive; easy to govern but impossible to enslave. † This means Brougham sees education as the tool, which creates free thinkers. Wilde has a better idea about education because he seems to believe that there are many ways to learn things. People are not taught in school how to deal with accidents, how to be trusted, and how to be a good friend to someone. Accidents are unexpected happenings that can be caused by chance. Accidents happen in many different ways and different places. Dealing with an accident isn't something that teachers explain it is something that a person learns first hand. When a person is in an accident there is a lot to deal with. Depending on the type of accident. For example I was in an accident, my truck rolled. The first thing I had to deal with is talking to the police officer. Dealing with the police is scary no matter what the situation is, not to mention a near death situation. The cop went over what happened, who was driving and of course who was drinking. After that was established the next thing to deal with was dad. A parental unit is hard to explain something like this to. There isn†t a teacher who can teach a student how to explain to their father that they just rolled their pick up. Some parents are very strict and not very understanding, and some parents are easy going and don't care. It would be hard for teachers to know what kind of an accident the student was in, and what the student is feeling after the accident therefore it would be hard to teach the student how to deal with an accident they just have to learn it for themselves. There is no teacher that can tech a person thing that are learn by being taught. People have to earn some ones trust they just don†t automatically trust some one. Teachers can't say their looks like a good person, they have on nice clothes, and they can be trusted. It don't work that way, trust has to be built. It can be built by returning something someone dropped or by listening when a friend is having a bad day, and not turning around blabbing what she just said. Sharing secrets helps build trust. A person has to learn who they can and can't trust, sometimes they may get burned and hurt, when they tell a secret and go to school the next day to find out the whole school body knows what the little secret was. They learned that they couldn†t trust that person, even if that person was dressed in nice clothes, and looked like a good person. Sharing secrets and knowing who that person is build trust. No teacher can tech a person to trust anyone they don't know. To be a good friend a person has to be there to listen to problems. Not only listening but willing to give advice. The old saying â€Å"If all your friends jumped off a cliff would you? † A true friend would say no, because they would be at the bottom, to catch their friends. A true friend would get up in the middle of the night to listen a dream that just couldn't wait until tomorrow. Teachers can't teach a person how to be a good friend or for that matter, teachers can't teach you how to be a good friend. If a person cares about another person they can be friends because they will be will to go out of their way to help the other person. If people didn't care about people they wouldn't help each other out, and they wouldn't be friends. People can be nice to people but that don't make them friends. Teachers can teach people how to be nice to people, also called manners. Friends are something that just comes natural. To know and to learn are two different things. Know how to wreak a truck or to wreak a friendship can only be taught by them. No teacher can tech a person how to roll a truck or how to gain the trust of a good friend. Only a person can tech them selves and still learn by the mistakes that where given, during the time that a person was taught.

Presences of Others Essay

It is shown that people have the tendency to perform better when in a group this is called social facilitation. There have been other studies done contradicting this and with more difficult experiments it actually hurts a person’s performance in a group. As Zajonc stated; a state of arousal is linked to performance without the presence of others. When an individuals is faced with a more difficult task it may lower that persons self esteem and then lead to that person not performing at his or her best. Most people are afraid of being judged and this will affect all of our normal everyday behaviors due to a low self esteem issues. Now with simple tasks a person’s performance can be a positive and a stimulating experience allowing a person to perform better and set higher goals for themselves and have higher self esteem. I am a person who can identify with these, in starting school a few years back I was very intimidated and self conscious about being in a class room with people I did not know. I watched everything I said or did and did not want to even raise my hand because I did not want to be embarrassed if I answered incorrectly or sounded stupid. At first in my class I did not perform very well with the group, but as I got to know everyone my positivity started coming out and I was able to benefit with being in a group and excelled. The article I read in the Journal of Social Psychology was about a widely accepted finding that in social psychology, that the mere presence of others reduces anxiety. Based on Wrightsman’s widely accepted findings, that his study which he originally demonstrated that the reduction of anxiety is less in the presence of others (at least firstborns). Though Epley raised some questions on the methodology of Wrightsman’s study and about the real reason there was an anxiety reduction, Epley stated that it was probably due to the distractions or social comparison and not just the  presence of others. I believe that depending on the situation the group may be in. I also found that also it depends on the situation and task at hand that a group is in and if the conditions are peaceful or hectic. The next article I read stated that the presence and type of situation and the connection between the two with the presence of an audience and how they react to the performance. Partic ipants were performing various tasks both in group settings and alone. In group settings word association was better performed compared to problem solving tasks which were more successful while performed alone. It all depends on the task at hand and in what situation the task is being performed in and under what conditions. Reference Journal of Social Psychology. Aug1978, Vol. 105 Issue 2, p301. 2p.

A Modest Proposal Questions Essay

1.The initiator perceived that the worst problems in Dublin were the poverty level being very high and that poor children are a burden to their parents because of the cost to take care of them. The issues that trouble him make him appear to be someone who cares about the economic well being of his country but not the well being of the people because he sees poor children as a burden to their families and society. 2.The initiator uses a serious tone to explain his solution and six main methods to try to persuade readers to accept his proposal. He states his solution would decrease the amount of Roman Catholics, the poor would have some money to pay their landlord, and the economy would grow. He also declares that the parents would no longer have to take care of their child after year one, a new popular food would be created, and there would also be an increase the tenderness of mothers towards their children. 3.Breeder frequently replaces mother in the proposal creating the perception that the initiator sees people as numbers; he doesn’t see people for who they are. 4.The expert is a cannibal, which suggests that the initiator is a cannibal or is exceptive of cannibalism. 5.Being a satire, A Modest Proposal, is an ironic title because the solution the initiator proposes is anything but modest, since he suggests roasting children. Although, the author also makes the initiator’s solution sound ridiculous to create the idea that readers should pity the poor Irish, creating a modest proposal. Being modest is being humble and Swift’s proposal to feel bad for the poor isn’t asking much. 6.a. Some shocking details of life the essay reveals would be that some poor Irish woman are selling themselves to planters in Barbados, Ireland is in a horrible economic situation and that England is oppressing Ireland. b. The previous details cause the reader to feel sympathy for th e Irish people in their time of hardship and disregard the proposal of the initiator because he is probably of wealth since his attitude is insensitive. 7. Swift intends for the reader to disregard the proposed solution of the initiator and accept the modest proposal. Swift uses the outlandish remarks of the initiator to create the feeling of sorrow for the Irish people due to their poverty and their struggles with England. 8. The major targets of this satire would be the wealthy and the noblemen because the satire mocks the heartless attitude towards the poor that the rich exude. The Irish are responsible for their sorry situation because Ireland doesn’t export enough goods, which harms their economy and as well as the fact that the Irish sell their goods for more than they are worth, but not many people can afford their high prices. Another way the Irish are accountable for their own plight is because poor people continue to have children that they cannot afford to take care of.

Inside job movie by charles ferguson Review Example | Topics and Well Written Essays - 250 words

Inside job by charles ferguson - Movie Review Example The first part (How We Got There) talks about the high deregulation of Iceland in 2000 and how it its banks became privatized. The world and Iceland thus plunged into a global recession following the collapse of the AIG and the bankruptcy of the Lehman Brothers. The first part shows how deregulation created corruption where several home owners, for instance, were granted loans they could never settle. The second part (The Bubble) is the period from 2001 to 2007 which saw a housing boom like none other where speculators would purchase credit default swaps and bet against collateralized debt obligations they did not own. As the AAA rated investments sky rocketed, the third part (The Crisis) highlights how the CDO markets collapsed with investment banks left with huge loans and real estates and CDOs they were unable to unload. The recession then ensued in November 2007 with Bear Streans going bankrupt in March 2008. Freddie Mac and Fannie Mae (both on the brink of collapse) were seized by the federal government as others such as AIG, Lehman Brothers, Chrysler and GM collapsed or became bankrupt. Foreclosures hence soared in the United States with the world’s financial system creeping to the depths of its grave. In part IV (Accountability) the government continues bail outs, banks start to gain power again as top executives walk away from their insolvent organizations. In the fifth part (Where We Are Now) many employees in factories have since been retrenched amid weak financial reforms from the administration of President

Management accounting- S-10 Assignment Example | Topics and Well Written Essays - 5000 words

Management accounting- S-10 - Assignment Example " Because various frameworks in the living, social and innovative planet may be grasped thusly, cybernetics cuts over numerous accepted disciplinary borders. The notions which cyberneticians improve along these lines structure a meta-disciplinary dialect through which we might better comprehend and alter our planet. Throughout the period when Anthony's accounting based approach to management control picked up prominence (1960s), the organizational hypothesis written works greatly slanted to a systems-theory perspective. This tendency impacted management control hypothesis and it got indivisible from organizational theory as a rule. To grasp the profundity of the impact that system theory had on management control hypothesis, it is vital to examine the primary tenets of systems theory. In addition, it is imperative to inspect the crux parts of the systems perspective as it affected the route in which classical theory evolved. The systems perspective was established in cybernetics and general systems theory (GST). Norbert Wiener's (1948) cybernetics idea illustrates the methodology of correspondence and control around individuals and machines to achieve alluring goals and to guide the automatic standards discovered in human biotic frameworks onto machines frameworks (Kloot, 1997, p. 49). Cybernetics is concerned with programmed regulation and control of living beings and conglomerations. It is said that cybernetics utilization a negative sentiment circle acted for by setting objectives, measuring accomplishment, contrasting accomplishment and objectives, bolstering back qualified information about unwanted fluctuations into the procedure to be regulated, and rectifying the procedure. As per this perspective, a management control handle in its best disentangled structure is comparative to a specialized control prepare, looking like the control of the high temperature of a room by a thermostat. Anthony's accounting control philosophy was effortlessly interlaced wit h the notion of robotic controls (Otley, et al., 1995, p. 44). In any case, the GST tries to clarify conduct by mulling over the interrelationship of parts as opposed to the nature of the aforementioned parts. A system is a gathering of interrelated parts functioning all in all. Particularly, a system is an arranged or complex entire; a collection or fusion of things or parts framing an intricate or unitary entire. A conglomeration, thusly, could be acknowledged a gathering of interrelated parts filling in general. There may be diverse subsystems that could be associated with structure much bigger systems. The systems view expects that to remember completely grasp the capacity of the entire systems; the interrelationships around diverse parts must be grasped. A framework is said to have a border, and hinging on the level of communication by the systems with its external border, a framework might be acknowledged either an open framework or a shut systems (provided that it doesn't col laborate with the earth). From the systems view, a conglomeration is made out of information, process, and yield parts, and additionally associated subsystems with a plainly outlined framework verge. As clear from the expositive expression, the framework theorists and the cyberneticians joined both hypotheses to demonstrate capacities of conglomerations and all the more in particular the capacity of administration control frameworks. The degree of the impact by cybernetics hypothesis on administration co

Imaging informatics Term Paper Example | Topics and Well Written Essays - 3000 words

Imaging informatics - Term Paper Example The ways in which it enhances the imaging data is through automating, simplifying, reinventing the techniques for the description, management analysis, and the ways in which the imaging data can be preserved. In general, imaging informatics is concerned with the flow of medical images throughout the medical chain; that is, the retrieval, analysis, interpretation, exchanging, and more importantly how the information is stored. The information that is contained in the databases is inclusive of images and data from Picture Archiving and Communication System PACS (Hwang & Woo, 2003, p. 269). Imaging informatics heavily depends on radiology. This is because radiology is a field in medicine that is driven by technology and is data intensive thus it is very accommodating for imaging informatics. This explains why radiologists have become the leading practitioners in the field of imaging informatics. Imaging informatics is a field whose significance traverses through several areas in the med ical field. As has been mentioned above, PACS, or what is in full referred to as Picture Archiving and Communication System is an area in which the significance of imaging informatics is highlighted. PACS, just as the name suggests, is a system that has been developed mainly for storage purposes of medical images. PACS provides an avenue in which images can be stored at a reduced price and more to this, it promotes convenience when it comes to the accessing of images. The most fundamental feature of PACS is perhaps the fact that it has images from multiple modalities thus it has a wide range of images to compare to (Hwang & Woo, 2003, p. 269). The main reason why imaging informatics is of significance to PACS is because it eliminates the manual transmission and retrieval of image data. This is because the that have come in to being as a result of imaging informatics are transmitted digitally. According to Huang (2010, pp.219-23), the major components of PACS are a gateway of image a nd data acquisition, a PACS server and archive, and several workstations. He farther elaborates that the PACS has two types of gateway. The first type of gateway which is used for textual data is the database gateway. The second type of gateway is the image acquisition gateway which is used for the data in the form of images. It is also key to point out that the images acquired by PACS are retrieved from imaging modalities or devices and related patient data that is archived in Hospital Information Systems (HIS), and Radiology Information Systems (RIS), two areas that will be discussed later on in the paper highlighting the significance of imaging informatics. The second component as pointed out by Huang, (2010) is the PACS server and archive. After an imaging examination, the results together with the patient information which is retrieved from the HIS and the RIS via the gateways is sent to the PACS server. This is the central nervous system of the PACS and it consists of very spe cialized computer servers. Again, this component of the PACS has to subdivisions; they are, the database server and an archive system. The core functions of the database server is to receive, store, and update the information in the system. The archive system on the other hand is devoted to the short-term, long-term, and permanent storage of the information i