THE ACCEPTABILITY OF POTATO (Sulanum Tuberosum) STARCH IN MAKING BIOPLASTIC
by
De Vera, Sharina Kriz B.
Grade 8- STE (A) Mahogany
CHAPTER II
REVIEW OF RELATED LITERATURE
The researcher uses potato as the main component of making bioplastic. Potato (Sulanum tuberosum) is a starchy root vegetable of Central American Origin. It is one of the most widely grown root- crops all over the world and also an example of tuber. It belongs to perennial subspecies of Sulanum tuberosum, in the Solanaceae family. Potato plant bears many tubers underground and grows about 12 to 8 inches in height. Usually, these tubers have round to oval oblong shape but vary widely in size. The importance of this is that some people will have an idea that Potato
…show more content…
When the application demands a cheap way to dispose of the item after it has fulfilled his job, biodegradability should therefore be regarded as an additional functionality. Its renewability, good oxygen barrier in the dry state, abundance, low cost and biodegradability are the advantages of starch for plastic production. The longstanding quest of developing starch- based biodegradable plastics has witnessed the use of different starches in many forms such as native granular starch, modified starch, plasticized starch and in blends with many synthetic polymers, both biodegradable and non- biodegradable, for the purpose of achieving cost effectiveness and biodegradation respectively. In this regard, starch has been used as fillers in starch- filled polymer blends, thermoplastic starch (TPS) (produced from the combination of starch, plasticizer and thermomechanical energy), in the production of foamed starch and biodegradable synthetic polymer like polylactic acid (PLA) with varying results. (Fabunmi, Tabil, Panigrahi, & Chang, …show more content…
Physically, glycerin is a water-soluble, clear, almost colorless, odorless, viscous, hygroscopic liquid with a high boiling point. At low temperatures, glycerin tends to supercool, rather than crystallize. Water solutions of glycerin resist freezing, a property responsible for glycerin’s use as permanent antifreeze in cooling systems. Except in very high concentrations when a dehydrating effect is noted, it is virtually nontoxic in the digestive system and non – irritating to the skin and sensitive membranes. It has a warm sweet taste and also it is odorless (The Soap and Detergent Association,
James, Christina, and Hugh, who would be the best candidate for MOOC (Massive Open Online Courses). They have to be open-minded and have great time management. The only person according to their essay that fits those specific trait is James Gregory and the essay is “Chunky Peanut Butter”. MOOC is a Massive Open Online Course. Its different from traditional college.
Many immigrants, such as the Irish, came to America for a better life. The potato famine, which started in the mid to late 1800’s, infected many Irish people. About 2,000,000 Irish men, women, and children perished during this terrible incident (document 1.) The majority of the Irish people were farmers and planted many potatoes. That meant during the potato famine, many potatoes were infected and rotten, so many farmers became poor and helpless.
In the short story, by Ethan Canin, “Star Food,” a boy named Dade is faced with struggles with his parents that have different points of views as his mother is an optimistic woman that wants Dade to keep dreaming. On the other hand, Dade’s father who is a realist wants Dade to carry the name and own Star Food after his father, he also wants Dade to work in store efficiently. They both wanted different things for his future, but everything changes when a poor, thieving woman enters their lives and steals from their store. The biggest question in “Star Food” is why Dade let the woman go. I believe Dade let the woman go because he felt like he wasn’t cut out for the life his father lived, and wanted to be more distinct than his strict father.
This is due to the side chains of dissociable and polar groups attached to the amino acids in the gelatin (2). Heat can also plays a factor in how quickly these side chains can be separated from the structure and dissolved. Certain functional groups that resided on the amino acid chains of the gelatin
The iodine test determines the presence of starch in biological materials. It is predicted that, if starch is not present, the solution with iodine remains yellow. However, if starch is present the solution with iodine becomes a blue-black colour. Plants have starch as the storage polysaccharide (glucose units held together by glycosidic bonds) while animals have the equivalent of glycogen. In this experiment, the dark blue colour is visible because of the helical amylose and amylopectin reacting with iodine (Travers et al., 2002).
INTRODUCTION A gas chromatograph (GC) can be utilized to analyze the contents of a sample quantitatively or in certain circumstances also qualitatively. In the case of preparative chromatography, a pure compound can be extracted from a mixture. The principle of gas chromatography can be explained as following: A micro syringe is used to inject a known volume of vaporous or liquid analyte into the head or entrance of a column whereby a stream of an inert gas acts a carrier (mobile phase). The column acts as a separator of individual or chemically similar components.
Introduction In class, a series of experiments were performed that pertained to the enzyme known as catalase, which converts hydrogen peroxide into oxygen. Due to peroxide being toxic to the tissues of both plants and animals, both possess the enzyme catalase, which breaks into two non-toxic compounds: water and oxygen gas. Enzymes are proteins that react to certain substrates to create a product, and continue doing so afterwards. Methods and Materials To test reactions between catalase and hydrogen peroxide, groups of three to four people were formed.
Abstract: The purpose of this experiment was identifying two compounds in an unknown mixture via liquid-liquid extraction and acid-base reactions. The compounds in the unknown mixture isolated by using recrystallization, and then their identity was determined by comparing the experimental melting point values with actual melting points. Unknown mixture 5 contained a carboxylic acid, 4-methylbanzoic acid, and a non-ionizable organic compound, 1,2-diphenylethane-1,2-dione.
About 71 percent of our planet Earth is covered by water, and the majority comes from the oceans (about 96.5 percent of all Earth’s water). It remains as the most expansive, diverse, and mysterious places on planet Earth. But it is being threatened by the pollution by people and nature itself. By polluting the habitat of marine organism will indirectly affect the ecosystem of the marine life. Marine life is dying and as the result the oceanic ecosystem is threatened.
The reason plastic is used in many products is because it can withstand up to tons of pressure per cm3, is cheap, is durable, and finally, there is no worry for discoloring. But these days, plastic is becoming a major problem the world has to deal with. Plastic is thrown into the ocean, and it is breaking down into very small pieces, and killing marine life, as they mistake those pieces to their prey. As a matter of fact, nearly all plastics are recyclable, but it 's the recycling companies ' machines that refuse to recycle that kind of plastic(eartheasy.com). I. Plastic, what have you done?
DETERMINATION OF PERCENTAGE ETHANOL IN BEVERAGES 1. Introduction to Gas Chromatography Gas chromatography is a very powerful separation technique for compounds that are reasonably volatile. The components of a sample partitions into two phases, the 1st of these phases is a immobile bed with a great surface area, and the other is a gas phase that permeates through the immobile bed. The sample is evaporated and passed by the mobile gas phase or the carrier gas through the column. Samples separates into the stationary liquid phase, based on their solubilities at the given temperature.
The percentage weight change is dependent on surface area of potato Controlled The amount of salt solution used Percentage of salt in solution Length of time the potato is sat in water Materials needed 3 Potatoes 600 ml 15% salt solution Utensils 4x 300 ml beaker Knife Cutting board Scale Ruler Procedure 1. 8 rectangular prisms will be cut from the potatoes;
In most foods, microbial contaminations occur predominantly at the surface, meaning using edible films such as chitosan allows minimal space between the foods’ surface and its’ environment. However, the coating has weak mechanical properties, and is permeable for gas and water vapour. Blending chitosan with starch improves its mechanical properties and allows a better novel food preservative. ADVANTAGES: - As chitosan is the second most abundant carbohydrate after cellulose, it’s not unusual that its waste exceeds 25bn tonnes per year.
In relation to a previous experiment in which the students determined the boiling points of two liquids, it was deduced that the boiling point of [propyl and methyl] alcohol was estimated to be around 80oC. According to numerous sources, ethanol boils (and consequently evaporates) at around 78.5oC[7] a much lower temperature compared to the alcoholic beverage’s other ingredients—water, for example, boils at precisely 100oC. It is immensely possible that because of this, ethanol is isolated from the beverage sooner than said beverage’s other components. Perhaps, if the students worked within
The former can be heated and shaped and are used in the modern world many times, containing everything from children's toys to toilet seats. Because they can be melted down and reshaped, thermoplastics are usually recycled. Thermoset plastics can only be heated and shaped once, after which the molecular changes mean they are “cured,” retaining their shape and strength even when they are subjected to intense heat and the pressure. Thermoset plastics plays a vital part in our modern world.