Strategies and Technology to Determine Chicken Freshness

Strategies and Technology to Determine Chicken Freshness 2.0Â  INTRODUCTION Recently, there have been various inventions of sensors to detect the freshness of food. A chemical sensor means that a tool that convert chemical information into an analytically useful signal. The device acts as an analyzer (Hulanicki et al, 1991). Smart or intelligent packaging has been the result of using such sensors into the food packaging technology. Smart packaging uses chemical or biosensor to observe the quality and safety of food from the producers and relay the outcome to the consumers. Time-temperature indicators, ripeness indicators, chemical sensors, biosensors and radio frequency identification are some of the examples of components in smart packaging (Kuswandi et al, 2011). 2.1Â  Chemical Sensor in Determining Chicken Cuts Freshness Chicken is a highly perishable food, as it usually deteriorates within a week of slaughtering, even when it is put in storage chiller systems. Chicken spoilage is mainly due to microorganisms (Kuswandi et al, 2013). Microorganisms in broiler chicken are heterogenous. The common microorganisms in aerobically stored, chilled poultry meats are Flavobacteria, Shewanella putrefaciens, Acinetobacter spp., Corynebacteria spp., Moraxella spp. and fluorescent pseudomonas (Amaut-Rollier et al, 1999). Biogenic amines (BAs) are generated by the growth of decarboxylase-positive microorganisms under favourable conditions to enzyme activity. Many Enterobacteriaceae, Pseudomonas spp. and certain lactobacilli, enterococci and staphylococci are active in the formation of Bas. The amount of amines formed depends abundantly on the type of microorganisms present. The formation of amines, including BAs is primarily a product of the enzymic decarboxylation of specific amino acid due to microbial enzyme activity (Kuswandi et al, 2013). The amino acids can also suffer oxidative deamination, decarbozylation and desulfurization, resulting in gases such as NH3, CO2, and H2S. Carbon dioxide (CO2) is generally known to be produced during microbial growth. (Rukchon et al, 2014) Quantifying chemical changes could provide information on the degree of spoilage. A number of indicators have been proposed to analyse the quality of meat, including BAs, volatile bases, nucleotide breakdown products, volatile acidity and CO2. Thus, these compounds can be taken as quality indicators of chicken freshness during storage (Rukchon et al, 2014). 2.2Â  Problem Statement Increasing of production of poultry meat and products are significant throughout the world in the last decade. Chicken and poultry products are famous because of their specific sensory attributes and the tendency of the public to consider white meat are healthier than red (Balamatsia et al, 2005). Nowadays, demands for the freshness and safety of food products by the consumers are increasing continuously (Kuswandi et al, 2013). However, spoilage of chicken and poultry products has become a burden to the producers plus it can bring a health hazard to the consumers, since poultry meat may contain pathogenic microorganisms (Economou et al, 2009). However, with the invention of smart packaging, which can observe the quality and safety of food and relay the result to the consumers. The sensors used in the packaging come with variety of functions, such as monitoring the freshness, pathogens, leakage, carbon dioxide, oxygen, pH, time and temperature. The technology is beyond the existing standard technologies, which are control of weight, volume, colour, appearance and etcetera (Kuswandi et al, 2011). Colour changes of pH dyes such as bromothymol blue, bromophenol blue, bromocresol purple, methyl red, bromocresol green, methyl orange, methyl yellow, phenol red can be detect acidic/basic volatile compounds, as they display an irreversible change in colour. These are some of the indicators that can be used to make sensors to detect chicken freshness. The sensors then can be stickered or paste onto the packaging (Rukchon et al, 2014). 2.3Â  Objectives The goal is to satisfy the increasing demands of customers, to be able to produce fresh goods, or at least providing scientific evidence informing the customers of the condition of the product, and not based on oral evidence only, as the seller or producer can just fabricate the truth. The objectives of this study are: To investigate the relationship between the numbers of microorganisms and level of spoilage To develop an indicator to monitor the freshness of chicken 3.0 LITERATURE REVIEW 3.1Â  Smart Packaging Smart packaging are packaging that can do more than traditional packaging, in terms of storing, protecting and providing information about the product (Kerry and Butler, 2008). Smart packaging can provide information about the condition (i.e. level of spoilage, freshness of content) of the contents of the pack through colour coding, wireless information, or etcetera. Smart packaging is quite different than active packaging. While active packaging will be activated when it is triggered, smart packaging is more to an indicator of microbial growth, physical shock, leakage or microbial spoilage (Intelligent and Active Packaging Opportunities in Specialty Papers, 2009). Smart packaging can switch on and off according to changing external or internal conditions. Then, it will inform the status of the content to the customers (Butler, 2013). 3.1.1Â  Indicators for Meat Freshness Indicators of freshness can provide direct information from the outcome of chemical changes or microbial growth in food. The production of freshness indicator in meat products depends on the types of product, related spoilage flora, conditions of storage and packaging system (Kerry, 2012). Table 1:Potential indicators in detecting meat freshness (Kerry, 2012) Potential indicators Components to detect Colour-based pH indicators Microbial metabolites Ethanol Fermentative metabolism of lactic acid bacteria Volatile compounds (e.g. dimethylamine, biogenic amines) Muscle-based product decomposition Myoglobin based freshness indicator Hydrogen sulphide, a breakdown product of cysteine Majority of meat freshness indicator are colour change indicator that gives its result according to microbial metabolites that are produced gradually during spoilage (Kerry, 2012). 3.1.2Â  Sensors for Food Pathogens and Contaminants The easiest microbial contamination presence that can be detected indirectly is by measuring changes in gas composition in relation to the microbial growth, by using gas sensor. The increase in CO2 concentration can determines microbial contamination only in packages that do not contain CO2 as a protective gas. The indicators are usually colour changing, that can be based on chromogenic substrates of enzymes produced by the microorganisms, the consumption of certain nutrients or the detection of microorganism itself. One of the examples is the use of nanostructured silk as a platform for biosensors. This silk has quite a lot of advantages, as it is edible and biodegradable, and it can also be integrated within the packaging of products itself. Conducting polymers, one of biosensors can be used to detect the gases released during microbe metabolism. Biosensors are produced by inserting conducting nanoparticles into an insulating matrix, and the change in resistance correlates to the total amount of gas released. These sensors are evolving to detect food borne pathogens through quantification of bacterial cultures (Kuswandi et al, 2011). 3.2Â  Examples of Indicators 3.2.1Â  Methyl Red Methyl red is a pH indicator. The methyl red/cellulose membrane functions as a freshness sensor to detect freshness or spoilage of chicken. It is based on increase of pH, because the amounts of volatile amines that are produced in the package increase gradually making the pH increase as well. Following this, the sensor will change colour from red to yellow as an indicator for spoilage, and it is of course visible to the naked eye. Since the pH of fresh chicken meats is around 5.50 and the pH of spoilt chicken meat is considered above 6.0, the increasing of pH will take place during the deterioration of chicken meats, as the volatile amines are increasing gradually (Kuswandi et al, 2013). Figure 1:Â  The colour changes of methyl red/cellulose membrane versus time of chicken cuts stored at room temperature (Kuswandi et al, 2013) Figure 2:Â  The colour changes of methyl red/cellulose membrane versus time of chicken cuts stored at chiller temperature (Kuswandi et al, 2013) 3.3.2Â  Colorimetric Sensors Array An electronic nose (e-nose) is a tool that can recognise specific components of a smell and examine its chemical makeup to distinguish it. E-nose consists of a system for chemical detection like array of electronic sensors and a system for recognising pattern, such as a neural network (WhatIs.com, 13 November 2014). E-nose system is composed of many non-specific sensors, and an odour stimulus produce characteristic fingerprint from the sensors array. Fingerprints patterns from known odour are then used to make a database, and teach the pattern identifying system so that unknown odours can be recognised and classified (Chen et al, 2014). A low-cost colorimetric sensors array was fabricated, using printing chemically responsive dyes on a C2 reverse silica-gel flat plate, along with a specific colorific fingerprint to identify volatile compounds. AdaBoost-OLDA, a combination of orthogonal linear discriminant analysis (OLDA) and adaptive boosting (AdaBoost) is a classification algorithm that was also proposed to use with the colorimetric sensors (Chen et al, 2014). Figure 3:Â  Schematic diagram of E-nose system based on a colorimetric sensors array (Chen et al, 2014) Total volatile basic nitrogen (TVBN) is one of the best indicators to differentiate between fresh and spoilt poultry. In China, above 15 mg/100 g of TVBN is considered spoilt meat (Chen et al, 2014). Figure 4:Â  Reference measurement results of TVBN content for all samples (Chen et al, 2014) Figure 5:Â  Differences images for fresh chicken sample (a) and spoilt chicken sample (b) (Chen et al, 2014) Figure 5 is the difference of images for the fresh and spoilt samples, by subtracting the initial from the final image. As mentioned earlier, each difference image has its own specific fingerprint. The sensors array which contain the selected metalloporphyrins dyes have responded sensitively to many of volatile organic compounds such as tryptamine, putrescine, cadaverine and other biogenic amines during chicken spoilage. The extra dyes which consist of three pH indicators have responded to hydrogen sulphide and organic acids such as lactic acid. All of the spoilage process can be recorded on the change of chemical responsive dyes (Chen et al, 2014).

Irp Lost and Found

In the story Lost and Found by Anne Scarf, There were many minor conflicts, but two major conflicts. The decisions the girls made to resolve the major conflicts lead to retaliation. One major conflict in the story was that Jamie, a 14 year old middle- school student, was dating a boy named Bobby Wallace, a high-school student, who wasn't a boy anyone would recommend talking to. Game's older sister, Dairy (who was also a high school student) tried to convince her younger sister that she wouldn't be socializing with him.The second major problem was the girl's father left them for 5 years, and now decides he wants to be a part of their lives. In the story, the youngest sister ran away because she was overwhelmed. They had no clue where she was, that's pretty much why I chose to make a missing persons t-shirt. When someone is missing, wearing t-shirts is a way good way to inform others that someone is missing. I added the books descriptions to describe Jamie and tried to raw a picture of how Jamie might look.In the story her father thought to look under a tree, which was where they found her. It was the last place she was happy. In all actuality, people don't think to look under a tree to find you, so I think the t-shirt idea would be useful. People evaluate your clothes every day and in real life, people wear t-shirt when someone is missing, or when someone dies. It catches other people attention and encourages them to help look.

Word Lab 2 Ch 3

————————————————- Jonner Public Library Jonner Public Library 4992 Surrey Court, Jonner, MA 02198 ? 291-555-9454 ? Web Address: www. jpl. net March 10, 2012 Mr. Brent Jackson 5153 Anlyn Drive Jonner, MA 02198 Dear Mr. Jackson: Thank you for registering online for our spring classes. As a library patron, you are aware that we offer a great deal more than books and magazines. The table below outlines the classes for which you have registered, along with the dates and locations: Class| Date| Location|Intro to Windows 7| April 10| Room 10B| eBay Basics| April 18| Room 24C| Genealogy Searches| April 24| Room 10B| Overview of Office 2010| April 28| Room 22A| Note that all classes, regardless of date, begin at 10:00 a. m. and last four hours. Although no materials or textbooks are required for the classes, you are strongly encouraged to bring the following items: * Pens, pencils, or other writing implements * Blank CD or DVD to store documents and notes created during class * Notebook or loose-leaf binder for handwritten notes Your valid library card to verify enrollment eligibility Please note that no food or drinks are allowed in any of our computer facilities. If you have any questions or would like to register for additional courses, please contact me at (291) 555-9454 or via e-mail at [email  protected] net. Again, thank you for your interest in and continued patronage of Jonner Public Library. We look forward to seeing you when your first class begins. Sincerely, Marcia Lawrence Head Librarian

Ph Buffer Using Cabbage Indicator - 981 Words

Lynne Andrew NB 1110 / M 5 – 7:50 Lab 1 February 2, 2015 pH and Buffer – Using Red Cabbage Indicator to Measure pH Introduction This experiment was performed to evaluate the following hypothesis: Red cabbage indicator can be used as a measure of pH. According to Campbell, et al, in Biology: Concepts and Connections, red cabbage contains a water-soluble pigment called anthocyanin that changes color when it is mixed with an acid or a base. The pigment turns red in acidic environments with a pH less than 7 and the pigment turns bluish-green in alkaline (basic) environments with a pH greater than 7 (2012). The pH indicating property of red cabbage indicator is well accepted in the scientific community and is a useful standard for†¦show more content†¦Acids were varying shades of red or pink and the bases were varying shades of green. The only unexpected result was the variability of color change in the pH 12 buffer solution, though this was attributed to the text, Table 2, stating the pigments are not stable at pH 12 (Pearson, 37). A weakness of using red cabbage indicator to check the pH o f an unknown solution or buffer is the subjectivity of determining color. What one individual sees as pink. another person would see as light purple. Color blind individuals would be at a significant disadvantage. Accuracy of pH is another consideration, since in addition to the variability in shades of color the pH shown by the red cabbage indicator is more of a ballpark estimate and limited to whole numbers. Using a pH meter, we can get a significantly more accurate reading that is objective and not dependent on an individuals interpretation of color or visible hue. In addition to the subjectivity of color, one would need to ensure a consistent ration of indicator solution to test solution in order to not affect the shade of the color change. Based on the data received and background information given, it is my opinion that although red cabbage indicator solution can be used to determine pH levels, it is best used as a more general indicator of whether a solution is an acid, base or neutral.Show MoreRelatedPh Lab Report1683 Words   |  7 Pages Introduction When using different methods to measure pH levels there are some tools that can be useful. Some more than others but by putting into action the different methods it may determine which tools will work best and give the best results when testing the pH within a solution. The pH, which stands for the proportion of hydrogen ions in a solution, could be acidic (acidosis), neutral or basic (alkaline). The pH scale goes from numbers 1 through 14. A pH of 7 is neutral; meaning the

Racial Profiling And Racial Segregation - 1255 Words

The existence of racial profiling is one of the most pressing issues facing the contemporary society of America. Historically, law enforcement has a heritage of racially motivated legislation - from slave codes, black codes, to other oppressive practices targeted at the populations of minorities. The present-day relationship between minorities and the police has been consequently influenced by such historical trends of discrimination. Recent events reflect the policing strategy of racial profiling where minorities have been mistreated and discriminated against, leading to a relapse towards social inequality once again. Predispositions toward criminality can be first traced back to the enslavement of Africans when slaves were brought to the†¦show more content†¦However, Oliver Brown, the parent of a black student denied access to Topeka s white schools, filed a class action lawsuit against the Topeka, Kansas school, turning the tables against racial discrimination. The Supreme Court unanimously ruled that the racial segregation of public schools violated the Equal Protection Clause of the Fourteenth Amendment. Despite how this decision put the Constitution on the side of racial equality and sparked the civil rights movement into a full revolution, the process of ridding one of the nation’s most inhumane habits did not finalize in this court case and continued to dwell into the late 1900s. Past circumstances are also represented in Michelle Alexander’s book The New Jim Crow, where she candidly challenges the notion of a new color blind generation by exhibiting how America has redesigned a racial caste within mass incarceration. Specifically, she discusses the late 1900s War on Drugs and its essential role to the development of today’s racial injustice. President Richard Nixon’s call for war aimed to reduce the drug epidemic, but unintentionally sparked the public’s existing unease about individuals of color. At this time,Show MoreRelatedEssay on Racism, Racial Profiling and Segregation in America2491 Words   |  10 Pagesbut also very common at State University. Although the Supreme Court in 1954 in Brown vs. The Topeka Board of Education declared segregation illegal, our student center today probably looks the way diners looked sixty years ago. Blacks are sitting in a secluded section of the Student Center; while whites are sitting in th eir own self-designated section. The segregation between blacks and whites in the State University Student Center is simply a natural occurrence between the two races. State UniversityRead MoreRacial Profiling Is Not Be Acknowledged As A Law Authorization1476 Words   |  6 PagesRacial profiling emerges as a standout amongst the most dubious issues in the United States of America as well as different parts of the world all the more so in the created nations. 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I turn around to find that a grown Hispanic man, mid-age, and heavily built is in fact, following me. In my head,Read MoreRacial Profiling And Its Impact On Society1209 Words   |  5 PagesCases of Racial Profiling There are tons of cases of Racial Profiling. Now a days many people are being targeted or attacked by racial profiling. Laws are being passed but not every police officer is following up with it. And because of this more and more people are becoming irritated with the government system. Just because a particular person from a particular race does something wrong, everyone from that race is being discriminated by so-called other races. Racial profiling is getting

Media s Influence On Public Opinion Essay - 1833 Words

In the last 80 years technology has advanced giving us various amounts and different types of medium in which we can source information from. When absorbing information, humans naturally conclude with an opinion. This essay will base around the issue that media does influence public opinion, in a way that the media uses different media effects and sources of medium to control the publics opinion. The subconscious media effects of Framing, Agenda setting and priming is used by the media in the method to control and alter the public opinion on a news story or political campaign. This essay will also look at several major media events throughout the last 80 years, drawing upon the examples of social media and war and how they have been structured and used to involve the media effecting peoples lives. Framing Media has been able to control and influence opinions of the public through news stories within the last 80 years through the development of framing. Framing is when a story or piece of news is portrayed in a certain way that is meant to control the audience’s opinion and attitude, to agree one way or the other that the media wants them to. The technique of framing can be seen as a controlling technique of journalism writing to sway or trick the audience to base their own opinion on what is being presented. The purpose of framing is a method so that public opinion cannot chose to go against what the story is intending the audience to agree with. Journalists argue theShow MoreRelatedSocial Media s Influence On Public Opinion And Attitudes967 Words   |  4 Pagesassistance of a wheelchair. Media, such as television, radio, newspapers, magazines, the internet, and social media play a crucial role in influencing public opinion and attitudes. A choice of words, an image, or a message may determine perceptions, attitudes, or behaviors of society. 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Just around the corner waiting in a newspaper stand and flashing bright colors across our TVs. It seems like there is something being reported continuously every day. News and information are only a few taps away; unlimited knowledge now sits in almost anyone’s back pocket. All these new forms of media are changing everything. Political campaigns are not something we typically think about. To most people above the age of 18Read MoreThe Media: A Powerful Voice1088 Words   |  4 PagesThe Media is a powerful voice listened to by millions of Americans, as well as billions of people across the globe. For decades, the media has been an influential instrument in the political realm. In today’s politics, the media is a necessary part of the campaign process and is undoubtedly a powerful tool for candidates in getting their message to the public and the engine by which public opinion is formed. But just how powerful is the media? Dictionary.com defines the media as, â€Å"The means ofRead MoreThe Media s Impact On Public Opinion936 Words   |  4 PagesThe media has always had a powerful impact on public opinion in Britain. With several different types and means of communication, such as TV, newspapers, social networking and radio, it is difficult for the public to not be even slightly impacted by the opinion of thousands that surrounds them every day. However, with newspapers spinning stories to promote the party they favour (such as the Daily Mail in favour of Conservatives or the Mirror in favour of Labour ) or to disparage the opposition, isRead MoreThe Agenda Setting Model Can Guide The Public Opinion And Mass Communication1464 Words   |  6 Pagessetting. The agenda setting model can guide the public opinion and mass communication about some social or political issues. Different with media effects model, the media effects more like to telling people how to think, however, the agenda setting model i s successful in telling people what to think about. In a general way, agenda setting theory was constructed in the environment of traditional mass media, and the purpose is to study traditional mass media. About the visual agenda setting, the particularRead MoreMass Media Such As Television, Newspapers, And Internet1457 Words   |  6 PagesMass media such as television, newspapers, and internet are the center of the public s communication and entertainment. Society relies heavily on mass media for their news, education, entertainment, and their socialization. It can inspire, persuade, and change the behavior of the audience depending on the objective. The public is often misinformed and uninformed by media outlets to control the information that reaches the public. As technology continues to grow, access to mass media continues toRead MoreExplain The Effects Of Family On Ones Political Values1171 Words   |  5 Pageswhat a democracy is and why it is significant. A democracy is a system of government where the people have the opportunity to have a say in important governmental processes. For instance, in a democracy, one has the privilege to directly vote on key public officials. This can be seen in presidential elections, state elections, etc. A democracy is significant because it protects the interests of the people, and allows citizens to feel a sense of authority in the nation’s government. Essentially, ensuringRead MoreThe Political Economy of the Media in Zimbabwe1491 Words   |  6 PagesThe Political Economy of the media in Zimbabwe The political economy of the media in Zimbabwe is mostly centered on the hands of the government. The government has control over major media players like the public media which include print and broadcasting media. Through its control of the public media it has greatly impede freedom of expression, freedom of the press, freedom of information and freedom of opinion in the media. However, the government has manage to give some private players room toRead MoreThe Media And Its Impact On Society Essay1723 Words   |  7 Pagescontrols the media, controls the mind†. The Media have become one of the most dominant source of education of the 21st century. We could argue that most Americans use the media as their main source of information. The side effect of that is the fact that the media are very polarized. With the ongoing polarization, we could hypothesize that people would have been more politically educated and oriented if the media was not infiltrated. Mass media are expected to be educational. Public opinion relies on

A field Essay Example For Students

A field Essay As I leave my house and its stress filed environment I think about the release and calm atmosphere of my field. As I pass the sports hall I see people almost crying because they just lost a game of football, I walk on past Tosco and see men and women struggling with bags of shopping. I hurry to get away from the commotion of life and in to the quiet streets of high light park. This part of my journey cools me and prepares me for the sanctuary I find within the field. I arrive and collapse on the light grass the strong sweet smell of fresh cut grass throws it self at my face and up my nose. The sound floats around; birds singing and trees swaying as if in slow motion. The sun belts down on to my face and all over my body, it feels like Im lying in a warm bath. So relaxed. So peaceful. I can feel all my care and worries floating up, floating around, floating away. No-one to disturb me no-one to push me, prod me, kick me or annoy me. As I look up I see the woods that are attached to the field, I think back to the summer of 2002 when almost every day with out fail Dave, Carl, and Matt and I would spend all day and some times all night in there, just smoking. Talking about life with its good points, and its bad. Just to remember the few magical moments of getting high with my best buddies, I still think that those times were the best of my life. Someone asked me before what I found so relaxing about the woods and field, but I couldnt answer them and I still cant explain it, its just a special warm fuzzy feeling that I get even in the coldest of weathers. For some reason we would never collect firewood during the day so someone would have to attempt the mammoth obstacle course of the treacherous terrain, that is the woods, using there cigarette lighters to find there way. I take a new box of twenty lambut and butler out of my pocket and start to unwrap the cellophane rapper. The smells waft out of the cardboard packet, the sent of tobacco excites my senses. I take a fresh straight white stick and put the end in between my lips, and then with my free hand I take my slightly low on gas clipper out of my breast pocket and strike the small flint. The chain reaction between the spark and the gas courses a magical flame, which lights the end of my cigarette. Its smoke, in clouds of white and cream rise around my face, its embers burning away the leaves of tobacco. The grass fells like a big fluffy cushion under my back I feel so free and so calm and so peaceful. The air tastes fresh and  moist against the harsh cigarette. I see a kestrel hovering around the bottom end of my field; it aims its body like a dart and dives to the ground like a heavy weight, then back up to the sky with a mouse in its powerful claws. Beyond that I see a plain flying across and through the clouds and I realise that. there is still life out there and that the time has come for me to go and join it.