The Use Of Enzymes In Textile Industry Biology Essay

The Use Of Enzymes In Textile Industry Biology Essay Enzymes are bio-catalysts and are used in several industrial processes since nineteenth century. Its use in textile industry is an example of industrial or white revolution. Enzymes, due to their non-toxic and eco-friendly characteristics, have gained wide applications in textile industry. Not only they are highly specific, efficient and work under mild conditions but also they help reduce process times, save energy and water, improve quality of product and reduce pollution. As a result they are rapidly gaining global recognition as important requirement for textile industry. Commercially enzymes can be obtained from three primary sources, animal tissues, plants and microbes. However, these naturally occurring enzymes are not produced in sufficient quantities to be readily used in industrial applications. Hence, microbial strains producing the desired enzyme are cultured and optimised i.e. fermentation, to obtain enzymes in sufficient quantities for their commercial use in textile industry. The enzymes used in the textile industry are amylases, cellulases, pectinases, lipases, catalases, proteases, xylanases etc. and are mainly used for processing of the textiles i.e. preparatory and finishing of the goods. Some of the applications include removing of starch, bleaching, degrading lignin, fading of denim and non-denim, removal of peroxidises, finishing of wool, decolouration of dyestuff, bio-scouring, bio-polishing, wool finishing, etc. (Shenai, 1990; Nalankilli, 1998; Barrett et al., 2003;Cavaco and Gubitz, 2003; Chelikani et al., 2004). CLASSIFICATION AND PROPERTIES OF ENZYMES USED IN TEXTILE INDUSTRY Enzymes are very specific toward catalysing the substrate. Hence these are classified on the basis of their catalytic functions in six broad categories: EC1 Oxidoreductases: catalyze oxidation and or reduction reactions EC2 Transferases: catalyze transfer of a functional group EC3 Hydrolases: catalyze the hydrolysis of various bonds EC4 Lyases: catalyse cleavage of various bonds by means other than hydrolysis and oxidation EC5 isomerases: catalyse isomerisation changes within a single molecule EC6 Ligases: joining of two molecules with formation of covalent bonds Properties of enzymes exploited for use in industrial application: Acceleration of the reaction rates by lowering the activation energy of the reaction. Operating optimally under milder conditions of temperature, pH and atmospheric pressure. Alternative for polluting, toxic and carcinogenic chemicals High specificity towards substrate makes easy to control their activity Biodegradable and do not produce toxic wastes. Due to their high efficiency, specificity, property of working under milder conditions and biodegradability enzymes are well suited for various industrial applications. ROLE FO ENZYMES IN TEXTILE INDUSTRY Use of enzymes in various textile processing processes has greatly benefited textile industry with respect to both environmental impact and quality of product. There are 7000 known enzymes, but only 75 are commercially used in textile industry (Quandt and Kuhl, 2001) and most of them belong to hydolases and oxidoreductases families. The hydrolases family includes amylases, cellulases, pectinases, proteases, catalases and lipases/estarases and oxidoreductase family include laccase, peroxidises. AMYLASES Amylases actson starch molecules and hydrolyses to give dextrin and small polymers of glucose units (Windish and Mhatre, 1965). These are classified according to the sugars they produced i.e. ÃŽ ±-amylases and ÃŽ ²-amylases. ÃŽ ±-Amylases being produced from filamentous fungi and bacteria are mostly used in industries (Pandey et al., 2000). This enzymes are stable over wide range of pH from 4-11 and optimal activity is related to the growth conditions of the source microorganisms (Vihinen and Mantsala, 1989). In general, ÃŽ ±-Amylases shows high specificity towards starch followed by amylase, amylopectine, cyclodextrin, glycogen and maltotriose (Vihinen and Mantsala, 1989). 1.1 Textile Desizing Size is an adhesive substance used to coat the wrapping threads used in weaving of the fabrics made from cotton or blend. Starch and its derivatives are broadly used to size fabrics due to their easy availability, relative low cost and excellent film forming capacity (Feitkenhauer et al., 2003). Amylases are used to remove this sizing material and prepare the fabric ready for dyeing and finishing (Cavaco-Paulo et al., 2008). Earlier to the discovery of amylases, desizing was done by chemical treatment of fabric with acid, alkali or oxidising agents at high temperature. But, this technique was inefficient in removing the starch which resulted in imperfections in dyeing and also degradation of cotton fibre. Amylases are commercially used for desizing fabric due to its efficiency and specificity and its effectiveness in completely removing the size without affecting the fabric (Cegarra, 1996; Etters and Annis, 1998). Starch is removed during washing in the form of water soluble dextrin and thus reduces the discharge of chemical waste into the environment. 2.0 CELLULASES Cellulases are the hydrolytic enzymes that catalyses the breakdown of cellulose to smaller oligosaccharides and finally to glucose. These enzymes are commonly produced by soil-dwelling fungi and bacteria such as Penicillium, Trichoderma and Fusarium (Verma et al., 2007) and shows optimal activity in temperature range from 30C-60C. The applicationof cellulases in the textile industry begin in late nineteenth century with denim finishing. It alone accounts for 14% of the worlds industrial enzyme market (Nierstrasz and Warmoeskerken, 2003). 2.1 DENIM FINISHING Denim is high grade cotton and its washing is done in order to give a worn look e.g. stonewashing of denim jeans, in which the denim fabric id faded using sodium hypochlorite or potassium permanganate are used as pumice stones (Pedersen and Schneider, 1998) it resulted in damage to the fabric and machine. Introduction of cellulases have increased the productivity without affecting garment or the machine. Cellulases hydrolyses the exposed surface of dyed (indigo) fabric leaving the interiors intact, partial hydrolyses of the surface results in removal of dye and leaves a light area. Most of the cellulases are produced from fungi, but cellulases from bacterial and actinomycetes origin are now studied with regard to its use in bio-stoning of denim. Cellulases used for washing of the denim can be further classified on the basis of optimal pH required for its maximum efficiency; as neutral cellulases operating at pH 6-8 and acidic cellulases acting at pH 4.5-6. 2.2 BIO-FINISHING Washing of cotton and other natural and man-made cellulosic fabrics, besides denim, such as linen, hemp, rayon and viscose by enzymatic activity of cellulases to improve final appearance is done by bio-finishing or bio-polishing processes (Videbaek and Andersen, 1993). The process helps in preventing the formation of ball of fuzz called pill on the surface of the garment, this formation usually results in unattractive, knotty fabric appearance. Cellulases, hydrolyses the microfibrils protruding from the surface of the fabric which tends to break off leaving a smoother surface. Bio-finishing may be an optional step for upgrading cotton fibrics, but is very important step in prevention of pilling or fibrillation during finishing of lyocell fabrics (Cavaco-paulo et al., 2008). Similarly, Carrillo et al. (2003) stated that cellulases can be used for viscose type regenerated celloloses like viscose and modal. Yachmenev et al. (2002) showed the use of ultrasound as an efficient way to improve the enzymatic activity in bioprocessing of cotton.

Industry essay: What are Web Services? -- Computer Science

Industry essay: What are Web Services? Web services have been hyped over the past year to be the most innovative improvement that has come to the Internet. It has been adopted by many companies, and has reached the forefront of applications development. So what is all the hype about? Web services can be described as an application that can be deployed or called over the Internet that allows applications to communicate with each other- regardless of the language in which they are written or which systems platform and operating system is being used. Each service is a discrete unit of code, and performs a small set of given tasks. Typically, web services make use of standard web protocols to perform its tasks- it usually follows an order: 1) find the web service requested, 2) determine how the web service is called once it is found, and 3) call the program or service requested. For the search portion, UDDI (Universal Discovery, Description, and Integration) is mainly used. It is a service that essentially is a directory of web services, and UDDI helps the user find the web service or program for which he is looking. WSDL (Web Service Definition Language) is most often used to describe how the web service or program should be called, and XML to communicate this. Finally, Simple Object Access Protocol (SOAP) encodes the XML data sent and received, and shares the data in messages over http. The potential power of web services can be displayed in a number of different ways. Web services are being used to integrate all sorts of data- from local programs interfacing with each other across a local area network, to large enterprise-level applications communicating across the Internet. A few examples of how web services can be utilized are listed below: * A utility pole is damaged in a remote area of Massachusetts, and a utility company has to come in and replace it. However, in order to do this, the cable, telephone, and electric utility companies have to act in a certain order in order for the damaged pole to be removed. Web services can be used to determine the status of the actions taken by the individual companies, since the order of the actions is based on which utility owns the pole. * A company wants to measure how much a particular product it has sold, which customers bought how much of the product, when the nex... ...partners." In other words, web services allow the bounds on software integration to be greatly expanded. It is now a great selling point for companies, particularly those that develop software. And at first, those companies that develop web services will benefit, but the success will eventually give way to those businesses that leverage web services in the most useful manner. INDEX Brown, Bob, in an interview with Zimon, Gene (CIO and senior vice-president of Nstar energy company), Utility IT Exec To Explore Power of Web Services, Network World, December 2, 2002 McAllister, Neil, Service Economy: Will Web Services Be the Savior of the Industry? New Artchitect, April 18, 2002 http://www.fatalexception.org/articles/2002/20020418.html Microsoft Corporation, What Are Web Services?, May 15, 2003 http://www.microsoft.com/net/basics/webservices.asp Saxby, Barbara Angius, Web Services: A Floor Wax or Dessert Topping?, March 7, 2002 http://www.goto-silicon-valley.com/articles/barbara-angius-saxby/web_services.pdf Sholler, Daniel, METAReport: What Are Web Services, Anyway?, Datamation, January 16, 2002 http://itmanagement.earthweb.com/it_res/article.php/955861

Business Psychology Essay

In this era of globalization, every organization must design its own strategy in terms of running its business at excellent level to survive and stay in competition. Trigger factors of higher demands that addressed to organizations are; emergence of free market which means that competitors are not only from the local market but also come from organizations all over the world, technological advances that developed rapidly over time also has role in higher demands that has been exposed to organizations in determining that everyone inside the organization must be compatible with the rapid development of technological advances at their workplace. Intense competition environment as already mentioned above certainly lead to tendencies for organizations in emerging innovations, creativities, enhancement of added value, service excellences, competitive prices and acceleration of process business plot as an objective to be â€Å"the winner† in competing with other organizations. A paradigm shifting in the design of the organizational strategies is necessary to be developed by organizations in order to survive in spite of the free market enforcement. One of the strategies that can be applied is building an effective team in the organization, the transformation in working method from individual to team work as the main focus must bring psychological effects for every individual in the organization. Every member in the organization is forced to be part of their team, regardless to their preference to work as individual or as a team. This phenomenon also brings the â€Å"domino effect†; each member in the organization will be evaluated not only for their field competencies related to their job performance, but also personal competencies related to perform effectively as a team member (team work competencies) will be evaluated by the organization. In the realization  of forming an effective team, more than one strategy related to competencies in team building, which are parts of the business psychology area, must be combined in a synchronous way. Business psychology can be use as a source in designing and implementing an organizational strategy, especially for the accentuation in understanding individual behavior and self improvement basis when they are put and work together in a team. There some business psychology focuses that can be used in designing a strategy which at the end also can be used as references in building personal competencies needed in order to perform as an effective team. These are the beneficial focuses: 1. Perception and personal reality Every individual has cognitive limitation in responding to information that they received, as a result of that phenomenon, they are forced to pick information selectively regarding to which received information associated as valuable and which is invaluable, which data that will be taken to the next level of information process. Related to selectivity process, individual tend to use heuristic process, an information processing which characterized by incomplete usage of given data, only based on general issues and experiences, and all those information processed quickly. This information processing form has potential in bringing biases, misunderstanding, and inaccurate result in processing information. Based on the implementation of information processing above, in interacting with other individual, stereotypes and expectations emerged. Stereotyping is a judgment processing of someone that made only based on perceptions to the group where they can be categorized. Expectations from each individual not always positively responded by the other party where they are interacting with each other. Expectations also correlate with communication styles that will be used in interactions. 2. Team ship In building an effective team, many approaches must be used and collaborated in a synchronous way. Defining roles in each team member is an important aspect for balancing the roles of team members in order to optimize the team’s outcomes and coherence. One of the models that can be used in describing team roles in details is â€Å"team roles model† by Belbin : An effective team, in the process basis is characterized by these indication processes; active listening, sharing leadership, taking turn-not interrupting, positive reframing, rescuing eac other’s views, spontaneous and open praise and elaboration of ongoing ideas. In terms of their task performance, an effective team is characterized by these indication processes; analyzing, focus on results, reflecting, open rejection-goal oriented, open rejection-based on data, seeking opinion, seeking clarification and closure. There are some important key behavior in an effective team, such as: open communication, mutual respect, shared output responsibility, agreement through consensus, active disagreement, clear individual responsibilities and roles, subordinate own goals to group objectives, engender high team morale, receptive to new ideas and change, and constructive and supported feedback. There are two applicable models that can be useful in order to design the strategy for establishing an effective team, and they are: Jungian model and Tjosvold model. a. Jungian Model b. The Ideal Team System by Tjosvold Sharing organizational expectations, business strategies and visions, core  values, organizational cultures and organizational objectives, can be defined as envisioning. Showing interest about team member’s visions, task clearances, valuing intercultural differences, and transferring the idea of the team ship’s paradigm importance are efforts in uniting the team. Bringing out loyalties, responsibilities, knowing potential of team members and assigning them based on that, and motivate them when they need motivation are characteristics in the empowering step. After being empowered, exploration in discovering problems and focusing on finding solutions can be established, diversities can be managed in finding the best solution, and all that will raise the team’s awareness to the importance of learning over time to have the upper hand in the market competition. After the best solution is reached, reflecting what the team has been through at every step of the cycle above can be very important as the source of any plan or step that needs to be revised on the next period in order to perform as an effective team. 3. Conflict resolution There are some causes of conflicts that usually appear in organizations: competition, scarcity of resources, interdependence/dependency, conflict in objectives and tasks, differences of opinion and of influence, differences in status, cultural differences, change, misperception, miscommunication, different ways of seeing things, personal preferences, pace of response, range of response and form of response, individual differences and emotional defenses. Traditionally, from all causes of conflicts that mentioned above, individual differences and emotional defenses are the main issues in organizations. In dealing with conflicts, there are three natural reactions that are usually expected from the individuals involved: striking back (leads to escalation, potentially damaging the relationship), giving in (usually results in poor outcome, can be seen as rewarding bad behavior), and breaking off (sometimes can be beneficial, often very costly, hasty and regretted). Regarding to conflict resolution, application of negotiation competencies can be very useful. There are five stages in negotiation process; orientation, position taking, search for solutions, crisis/deadlock, settlement and finalization. It is important to each team member to identify their position in those stages that are related in optimizing conflict resolution process. By knowing and sharing their each position, they can build the same perceptions in finding the best conflict resolution scheme. Principled approach is a combined technique in negotiation from soft and hard style of positional bargaining. In this approach, participants are problem solvers, the goal is a wise outcome reached amicably and efficiently, people and the problem must be separated, must be soft on the people and hard on the problem, independent of trust is proceed, the focus is on interests not the positions, interests are being explored, having a bottom line is avoided, options for mutual gain are invented, multiple options are developed, the use of objective criteria is insisted, a result is reached based on standards independent of will, there is tendency to be open to reasons and yield to principle, not pressure. Conflicts can lead to project delays, missed market opportunities, confused communication, inconsistent information, teams fail and difficult to retain good staff. Considering the effects of unresolved conflict, there are three category : first order effects (quantifiable) can be counted by employee replacement cost, including termination costs and recruitment, second order effects (harder to quantify) which can be observed by increased supervision or management activities , and third order effect (impossible to quantify) when its already revealed in passive aggressive behaviors. Look more:  problem focused coping essay There are two types of conflict; task focused, which is characterized by differences of views and opinions, based on facts and reasoning, and related to intellectual matters. The other type is relationship focused conflict, characterized by anchored in personal differences, influenced by history/assumptions, and related to feelings and emotions. There is a model by Thomas Kilmann which explained deliberately about correlation between  assertiveness and cooperativeness in dealing with conflict. 4. Decision making There are two types of decision making process that people tend to implement, they are: width (diverging) and depth (converging). Diverging type is characterized by some points; seeking options/strategies, works with multiple perspectives, requires more options, considering new ideas, combining options/lateral ideas, and creative suggestions. On the other hand, converging type is characterized by: seeking consensus, seeking clarification, seeking structure, review based on new information, analytical, making inferences, assess consequences based on data, strong defense of viewpoint, clear decisions and outcomes. The usage of both types can be based on the situation that the decision making processes is taking place in the organization. Combination of width and depth are expected and can be the best option in decision making process.

A Review of James Joyces Novel Ulysses

Ulysses by  James Joyce holds a very special place in the history of English literature. The novel is one of the greatest masterpieces of modernist literature. But, Ulysses is also sometimes seen as so experimental that it is completely unreadable. Ulysses records events in the lives of two central characters--Leopold Bloom and Stephen Dedalus--on a single day in Dublin. With its depth and complexities, Ulysses completely changed our understanding of literature and language. Ulysses is endlessly inventive, and labyrinthine in its construction. The novel is both a mythical adventure of the every day and a stunning portrait of internal psychological processes--rendered through high art. Brilliant and sparkling, the novel is difficult to read but offers rewards tenfold the effort and attention that willing readers give it. Overview The novel is as difficult to summarize as it is difficult to read, but it has a remarkably simple story. Ulysses follows one day in Dublin in 1904--tracing the paths of two characters: a middle-aged Jewish man by the name of Leopold Bloom and a young intellectual, Stephen Daedalus. Bloom goes through his day with the full awareness that his wife, Molly, is probably receiving her lover at their home (as part of an ongoing affair). He buys some liver, attends a funeral and, watches a young girl on a beach. Daedalus passes from a newspaper office, expounds a theory of Shakespeares Hamlet in a public library and visits a maternity ward--where his journey becomes intertwined with Blooms, as he invites Bloom to go along with some of his companions on a drunken spree. They end up at a notorious brothel, where Daedalus suddenly becomes angry because he believes the ghost of his mother is visiting him. He uses his cane to knock out a light and gets into a fight--only to be knocked out himself. Bloom revives him and takes him back to his house, where they sit and talk, drinking coffee into the wee hours. In the final chapter, Bloom slips back into bed with his wife, Molly. We get a final monologue from her point of view. The string of words is famous, as it is entirely devoid of any punctuation. The words just flow as one long, full thought. Telling the Story Of course, the summary doesnt tell you a whole lot about what the book is really all about. The greatest strength of Ulysses is the manner in which it is told. Joyces startling stream-of-consciousness offers a unique perspective on the events of the day; we see the occurrences from the interior perspective of Bloom, Daedalus, and Molly. But Joyce also expands upon the concept of stream of consciousness. His work is an experiment, where he widely and wildly plays with narrative techniques. Some chapters concentrate on a phonic representation of its events; some are mock-historical; one chapter is told in epigrammatic form; another is laid out like a drama. In these flights of style, Joyce directs the story from numerous linguistic as well as psychological points of view.With his revolutionary style, Joyce shakes the foundations of literary realism. After all, arent there a multiplicity of ways to tell a story? Which way is the right way? Can we fix on any one truthful way to approach the world? The Structure The literary experimentation is also wedded to a formal structure that is consciously linked to the mythical journey recounted in Homers Odyssey (Ulysses is the Roman name of that poems central character). The journey of the day is given a mythical resonance, as Joyce mapped the events of the novel to episodes that occur in the Odyssey. Ulysses is often published with a table of parallels between the novel and the classical poem; and, the scheme also offers insight into Joyces experimental use of the literary form, as well as some understanding of how much planning and concentration went into the construction of Ulysses. Intoxicating, powerful, often incredibly disconcerting,  Ulysses is probably the zenith of modernisms experimentation with what can be created through language. Ulysses is a tour de force by a truly great writer and a challenge for completeness in the understanding of language that few could match. The novel is Brilliant and taxing. But, Ulysses very much deserves its place in the pantheon of truly great works of art.