BIODEGRADABLE SUBSTANCES Biodegradable matter is generally organic materials such as plant and animal matter and other substances originating from living organisms‚ or artificial materials that are similar enough to plant and animal matter to be put to use by microorganisms. Some microorganisms have a naturally occurring‚ microbial catabolic diversity to degrade‚ transform or accumulate a huge range of compounds including hydrocarbons (e.g. oil)‚ polychlorinated biphenyls (PCBs)‚ polyaromatic
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quality of the bioplastic product‚the researchers used okra wherein mucilage can be found which lessens the brittleness of the said product because of the so called‚ glycirin. Another concerned material in the study is cornstarch. It is the source of polymer which is said to be the building blocks of the eco-friendly plastic product. What makes this study different is that the researchers used raw materials which are seldomly used in a more different way and utilize it to make a new product which could
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Chapter 5 An Introduction to Carbohydrates Carbohydrate – sugars‚ encompasses the monomers‚ called monosaccharides‚ small polymers called oligosaccharides‚ and large polymers called polysaccharides 5.1 Sugars as Monomers 1. How Monomers Differ a. Monosaccharide – simple sugar‚ monomer i. Carbonyl group serves as a distinguishing feature 1. At end of molecule‚ forms an aldehyde sugar (aldose) 2. In middle of molecule‚ forms a ketone sugar (ketose)
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reversible change in the color of a compound when it is heated or cooled. Systematically investigated thermochromism was in 1971 at first time. The following 4 materials are used as thermochromism (1) Organic Compound (2) Inorganic Compound (3) Polymer (4) Sol-Gel 1. Organic compound thermochromism Organic compound thermochromism occurred due to equilibrium between two molecular species‚ acid-base‚ keto-enol‚ lactim-lactam‚ or between stereoisomer or between crystal structures. This type of thermochromism
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Chemistry Exam Study Sheet Organic Chemistry • Study of compounds to which carbon is the principal element. • Carbon is special because it has 4 bonds. Functional Groups • Organic substances are organized into organic families. • Organic Families – group of organic compounds with common structural features. o Each family has a recognizable physical property and a specific structural arrangement. o Each combination is referred to as a functional group. o Even
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I. Lubricants selection and Application A.Viscosity Most important property of any lubricant is viscosity. A common mistake when selecting a grease is to confuse the grease consistency with the base oil viscosity. Because the majority of grease-lubricated applications are element bearings‚ one should consider viscosity selection for those applications. While most would not use an EP 220 gear oil for an oil-lubricated electric motor bearing‚ many people will use a grease containing that same oil
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industry was an early adopter of 3D printing and began to explore applications as soon as the technology was available for industrial production. Some sector leading firms such as Boeing or Airbus began to use polymer printed parts for non-structural production applications in the mid-90s. Polymers were the start of a strategic roadmap will end up with the use of SLS metal machines on this decade. Boeing has already produced tens of thousands of fully functional and flying parts‚ representing at the moment
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with fossil fuel polymers that are highly pollutant and will someday deplete. With Laine’s new findings we use little more than sand or rice hull‚ ethylene glycol (antifreeze)‚ and a caustic to create these silicon-based compounds that are used in the production of products such as computer chips and textiles. We can also use this process to create silicon-based polymers which could someday replace the depletable fossil fuel polymers in use today. These silicon-based polymers would make products
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have been shown to produce c-PGA outside the cells. (Cheng et al.‚ 1989; Goto and Kunioka‚ 1992; Hara et al.‚ 1982a‚b; Housewright‚ 1962; Kubota et al.‚ 1993a‚b; Murao‚ 1969; Thorne et al.‚ 1954; Troy‚ 1973). In addition‚ c-linked glutamic acid polymers have also
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because of the high reactivity of its double bond is readily transformed into many useful products. Alkenes: more reactive than alkanes due to the presence of the C=C double bond‚ which can be broken and join up with other molecules to form a polymer. (Addition reaction) • The double bond present in ethene is broken‚ causing two free electrons to become available. • This allows other substances to react with ethene and an addition reaction occurs. • In alkanes‚ only a substitution reaction
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