Evaluation of edible coating to alleviate the chilling injury in peach fruit (Prunus persica L.)
Abstract
Peach (Prunis persica L.) is one of the major temperate fruits grown in australia.
It ripes and deteriorates very quickly when stored at ambiant temperature. Cold storage is used to slowdown the decay process. However, chilling injury caused by storage of fruit within the 2.2-7.6°C (36-46°F) temperature range is one of the major post-Harvest physiological disorder that limits the storage life of peach under refrigeration. It causes flesh mealiness (dry texture and softening of fruit), internal breakdown, failure to ripen and flavour loss. Application of edible coating is one of the control measures of this disorder. Yellow and white-flesh
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persica (L.) Batsch, var. nectarina] belong to the Rosaceae family and are thought to have originated in China (Salunkhe and Desai, 1984). A peach fruit is approximately 87% water with 180 kJ (43 kcal) and contains carbohydrates, organic acids, pigments, phenolics,vitamins, volatiles, antioxidants and trace amounts of proteins and lipids, which make it very attractive to consumers (Kader and Mitchell, 1989b; USDA, 2003). Peaches and nectarines ripen and deteriorate quickly at ambient temperature. Therefore, cold storage is used to slow these processes and decay …show more content…
These symptoms mainly develop during fruit ripening after cold storage, and the problem is not noticed until the fruit reaches customers (Bruhn et al.,1991; Crisosto et al., 1995). Thus, postharvest treatments that can alleviate chilling injury and extend shelf-life of pineapple fruits are urgently needed. CI visual symptoms develop within 1 or 2 weeks when fruit are stored at 2–5 ◦C compared to 3 weeks or more at 0 ◦C (Anderson, 1979; Lill et al., 1989;Crisosto et al., 1999a). At present, wax (edible coatings) have been used as an effective technology to increase the quality of postharvest fruits and vegetables(Qiuping and Wenshui, 2007; Fan et al., 2009; Tzoumaki et al., 2009; Tietel et al., 2010). Edible coatings may be composed of polysaccharides, proteins, lipids or a blendof these compounds (Li and Barth, 1998; Park et al., 1994; Guilbert et al., 1996;Mahmoud and Savello, 1992; Arvanitoyannis and Gorris, 1999). These coatings may retard ripening and increase shelf life of coated produce, without
“Strange Fruit” by Billie Holiday conveys the inhumane, gory lynchings of African-Americans in the American South, and how this highly unnatural act had entrenched itself into the society and culture of the South, almost as if it were an agricultural crop. Although the song did not originate from Holiday, her first performance of it in 1939 in New York City and successive recording of the song became highly popular for their emotional power (“Strange fruit,” 2017). The lyrics in the song highlight the contrast between the natural beauty and apparent sophistication of the agricultural South with the brutal violence of lynchings. Holiday communicates these rather disturbing lyrics through a peculiarly serene vocal delivery, accompanied by a hymn-like
In the story “Peaches”, Reginald McKnight introduces his main characters, one being Marcus. Marcus is a good guy, but he is described in many different ways, due to his bad temper and immaturity level. Throughout the work, author Reginald McKnight takes great care to illustrate situations and describe feelings and personalities that many men experience. This way, even though Marcus is having trouble controlling himself around other people and arrogant at times, he still tries to be a better person for Rita and for himself. He does this by going out of the country to experience other cultures and enhance his morals. Although Marcus is strong and eager, he is actually an easily irascible, impatient, immature, manipulative, unstable man whose inexperience does not prepare him for the frequent mishaps in his life.
In the story “Peaches”, Reginald McKnight introduces his main characters, one being Marcus. Marcus is a good guy, but he is described in different ways, due to his confidence and insecurity. Throughout the work, author Reginald McKnight takes great care to illustrate situations and describe feelings and personalities that many men experience. This way, even though Marcus is having trouble controlling himself around other people and arrogant at times, he still tries to be a better person for Rita and for himself. He does this by going out of the country to experience other cultures and enhance his morals. On one level Marcus demonstrates that he is incredibly confident, on the other level he shows signs of being insecure, manipulative, unstable and incapable of achieving change.
The war in Sierra Leone changed many lives dramatically. It started in 1991 and ended in 2002. Between the Revolutionary United Front (RUF) and the Rebels. For Ishmael and Mariatu both were brought in the war around 1993 when they were about eleven or twelve years old. Ishmael and Mariatu, in the two books, A Long Way Gone and The Bite of the Mango, Both Ishmael and Mariatu have experiences in the War. The two children both have separate stories of their unbelievable journeys through the war and their life after. Although they were both pulled into the war against their will, Mariatu was pulled in as a victim and Ishmael was pulled in as a perpetrator.
In the 1900s, the United States was a nation that took part in racism and, eventually, took part in the lynching of African Americans. “Strange Fruit”, a poem written by Abel Meeropol, and the song being performed by Billie Holiday, is a poem that demonstrates the horror of the author to discover the happenings of a lynching and to see the image of one taking place. The poem was widely known as a song sung by Billie Holiday in 1939 and was written and published by Abel Meeropol in 1937 being the first literary writing to publicly object lynching. Abel Meeropol was a Jewish man and an English teacher for 17 years. He adopted two children, Robert and Michael, after their parents, Julius and Ethel Rosenberg, were executed. The literary works were
In this observational lab, I went to Fiesta Guada La Hara in Fruita at 1:20 pm on the twelfth of January, with Emily Kavanaugh, Sierra Raines and Colby Paulson in order to conduct this experiment. The overall experiment lasted two hours.
In the novel ‘Mulberry and Peach’, written by Hualing Nieh, Mulberry is faced with a dissociative identity disorder. This allows her to get in touch with her second personality, Peach. Throughout the novel, Nieh will emphasis Peach's thought and speech through italic text. Owing to calligraphy, Italic writing is generally slanted to the right, having been using as a method to emphasize words in text. The use of italic wording can also be seen when emphasizing a word or phrase from a speaker. Within Mulberry & Peach, Hualing Nieh uses italic wording to express Peach's speech, which is an interesting way to use italic text. Many of Peach’s ‘logs’ within the novel are extensive and are all in italic, creating a relatively easy method of differentiation
During this few days, the class focused on two poems Strange Fruit and Primping in the Rearview Mirror. Both poems had interesting stories and meaningful messages behind them. I particular liked reading Strange Fruit by Abel Meeropol. Even though the poem was heavy as it describes the horrendous lynching of black men in the South during the 1940s. I think the poem, both when it was originally written and now, allows it readers to truly think about the serious role that racism had in the American society.
There is a great promise of application of ice structuring proteins in food that are frozen. Ice structuring proteins can inhibit re-crystallization during freezing storage, transport and thawing, thus preserving food texture by retarding cellular damage and minimal loss of nutrients (for fruit and vegetables like strawberries, raspberries, tomatoes) by reducing drip (Griffith and Ewart, 1995, Feeney and Yeh, 1998, Breton et al., 2000, Wang, 2000). Re-crystallization in frozen food occurs when temperature fluctuates during storage or transit, resulting in coarse texture. This technique is well suited to ice cream (Warren et al., 1992). Ice structuring proteins also find use in chilled and frozen meat, where large ice crystals may form intracellularly, resulting in drip and loss of nutrition during thawing. Since ice structuring proteins are located extracellularly in freeze-tolerant organism, these proteins can be added to food by physical means such as mixing, injection, soaking, or vacuum infiltration, or even by gene transfer (Venketesh and Dayananda, 2008).
During bumper harvest it was usual to seek help from neighbours who will assist to store and preserve food. As a young boy, I enjoyed taking part in preparing and storing a variety of sun dried vegetables and coconut flakes. Sun dried cassava was used to make cassava bread, sun dried ginger was used to make ginger wine which was sweetened with locally produced honey.
Food can be classified as fast food, junk food, whole food, organic food out of these whole food is unprocessed, unrefined so it has very short shelf life because most foods contain enzymes or natural chemicals, such as acids or alcohols, that cause them to begin to lose characteristics almost immediately after harvest or preparation. In addition, a several of environmental factors, such as heat and the presence of microorganisms, acts to change foodstuffs in ways that may harm the food product so food should be processed to increase its shelf life because food is vital for survival. Food preservation is one of the oldest technologies used by human beings to avoid its spoilage. Different methods have been found and developed for this purpose such as boiling, freezing & refrigeration, pasteurizing, dehydrating, pickling. Some of these are traditional methods. Certain chemical substances are also added into the food to avoid spoilage of food, such substances are called food preservatives.
According to nutritional sciences department at the University of Missouri Extension, there is an adverse effect on nutritional value of dehydrated foods. In the article, “Food Preservation Drying Foods,” the extension advocates for a reconsideration of the constant support for dehydration, it explains that drying is one of the oldest methods of food preservation. Techniques have been passed from one generation to another based on what worked and what didn’t. Methods used for drying food have become sophisticated over time. Today the variety of dried foods in the market place has created a multimillion dollar industry. The nutritional value of food is affected by the dehydration process because of methods of food dehydration. Although some people say that food dehydration Is good, there are negative effects do to nutrient laws because of modern technology and food dehydration, because of the problems with dehydration, because of the value of dehydration versus loss in nutrients. Salting, drying in the sun, an open room, or in stove tops are some methods to use when dehydrating food. Some people used salt to dehydrate foods (University of Missouri 1). The sun and wind was used in 12,000 B.C to preserve food (Nummer 1).When using a dehydrator you would need a large space to work Nummer 4). Dehydration is drying out food, and taking the moisture out of foods (food dehydration 2). Some food can be dried in an oven, dehydrator, and in a microwave (University of Missouri 1). When doing oven drying it is very important to control the temperature in the oven because it could cook the food instead of dehydrating the food (University of Missouri 2). Most of dehydrating is dried out by heat. Dehydrated meat will stay fresh for up to six mo...
Wild pineapples are still to be found in parts of tropical America in which they are small fruited, inferior in eating qualities, and extremely seedy. To eat a pineapple full of these seeds is like trying to eat one of our present day seedless fruits containing one thousand small bits of gravel. It was believed that long periods of propagation of a domesticated species would result in the plant losing its ability to produce seeds. Actually there is no scientific evidence to this belief. Seedlessness usually appears in normal seed-bearing plants as a result of a mutation in the chromosomes...
Food Preservation is the ways to retain the food quality in a longer times. It is to prevent the food decomposition and fermentation. Besides that, food preservation not only to prevent the food getting spoilt in a long period of time but also preserved the colour, taste and the food nutritive value. Nowadays, food preservation has become more and more important component in the food industry as the consumers expect that able to purchase those foods that are out of season or imported from other countries. Furthermore, there are few reason why food preservation is important in our daily life such as preservation foods when they are in season it may added variety choices in our meals for example smoke meats and
This clearly shows that the fruits and vegetables play a vital role in maintaining our good health. Fruits and vegetables are seasonal and grown in different parts of our country. They need to be stored for longer period and transported to different places. It makes necessary for us to find out whether there is any damage to the useful contents of the fruits and vegetable during the storage and transportation or due to some preservatives or other factors and what kind of nutrients, minerals, etc. are present in their juices. With this idea in mind, the project has been undertaken.