Cross-linked polyethylene

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    clear complexes of helixes or entanglement may indicate the defect of the network and produced the exothermic peak in DSC result. A study on fabrication of nano fiber from alginate (Nie et al. (2008) found that the entanglement may increase the flexibility of chains of alginates. This flexibility may promote the swelling capability of the non-crosslink sample. The AFM analysis measured the average Young’s modulus of 2344.17 MPa for the non-crosslinked film and 2314 MPa for the crosslinked film as shown in Table 2. The deviation in the measured Young’s modulus may be due to the different thickness of film as solidification process occurred during film casting. Using Equation 1 (Zhu & Wool, 2011), the crosslink density calculated for the cross-linked film was 0.934 mol/cm3. This value is lower compared to the crosslinking density calculated by Sarika et al. (2014). They obtained the crosslink density of 2.51 mol/cm3 for the scaffold made of gelatine and gum Arabic aldehyde. Elsewhere, Zhu and Wool (2011) calculated the crosslink density in nanoclay-filled elastomers to be around 20-40 mol/cm3. This may suggest that vanillin used as a crosslinker has promoted the physical crosslink between vanillin and semi-refined carrageenan. This then promoted the disintegration properties, which is in agreement with the results of XRD, TGA and DSC. Conclusion The addition of vanillin as a crosslinker shows a positive indication to improve the ability of film to disintegrate, which is…

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    Transvaginal Mesh

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    Medical devices function to save and improve the lives of humans across the globe. Sadly, some devices turn out to be defective, leading to new health issues and possibly even death. This occurs when a faulty design prohibits the device from working as intended or when one or more parts of the product are contaminated during manufacturing. As a result of the defect, the patient may find they need to undergo further treatment, often in the form of surgery, and some die as a result of the product…

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    recycling, but in many cases, not all of the materials can be recycled (Marsh & Bugusu, 2007, n.p.g.). For example, some materials, especially plastic food containers, are contaminated with oil and grease, which make them unsuitable or hard for recycling (“Identify recyclables”, n.d., n.p.g.). To give a better view about recyclables, the materials’ statuses for recycling are outlined as follows. • Papers & paperboards Sometimes, it is difficult to identify the recycling status of papers in the…

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    Polyethylene Essay

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    QUESTION: Give the Preparation, Properties and Applications of any four POLYMERS 1. Polyethenics ( Vinyl Resins) They are obtained by the polymerization of monomers containing the ethylenic bond (-C=C-) I. Polyethylene ( PE ) Polyethylene is one of the simplest and most inexpensive polymers. It is a waxy, chemical inert plastic. It a thermoplastic formed by the addition polymerization of ethylene. There are two types of polyethylene  Low Density polyethylene (LDPE) By using free radical…

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    vulgaris as it accounts for over 90% of all Ichthyosis cases and then there is X-linked Ichthyosis, which is the least common type of Ichthyosis with there being only one in every 6,000 births in males (Panthagani). X-linked Ichthyosis was chosen as the area of interest, it is a recessive disease in which only males get the disease and females are carriers for the disease. The gene that causes Ichthyosis is X-linked, which means it is a disease passed down from a mother to her child. The gene…

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    remember the story of the crucifixion and how it made them feel. The emphasis is on the cross and the loyalty is gives to Christ. To connect with his audience, the narrator breaks his dream into three parts. To get the full effect, we must remember how the story of the crucifixion made us feel. Dream of the Rood is similar to Christian George Stevens’ The Greatest Story Ever Told (1965) because both show commitment to the cross. The GSET takes the most time on the scene of the crucifixion,…

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    granted every living soul in the kingdom, yes even children, the Steel Cross of Bravery(it’s not a Christian Cross, both axis are the same length it’s more like an x but thinner like “)(“ or 2 v’s stacked on each other), which symbolizes his admiration for his people, and in appreciation, the people gifted Viktor the Steel Cross of the People, which houses a large diamond at its center. Each batch of crosses was made with a bit of steel reclaimed from the battlefield at Grauhof. Everyone had…

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    The Crux, or Southern Cross as it is more commonly known, is the smallest of the 88 constellations. I've have chosen it as it is the Constellation that I am always able to find. This is because it is a distinctive constellation, the stars within it form a cross that is visible from the Southern Hemisphere all year round. The points of the Southern Cross are formed by consist of four stars. These are called Alpha, Beta, Gamma, and Delta Crucis. Throughout history it has served as a navigation…

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    great-grandparents moved to a three-decker house on Vernon Hill. They sought a better life for their children by stressing the importance of education as the key to social and economic mobility. Three generations later, I am a rising sophomore at the College of the Holy Cross, located within a few miles of this neighborhood. Although I am living the American dream, I am keenly aware that many are not blessed with the opportunities that I have been given. In…

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    2. Identified Challenging Behavior & Operational Definition • Challenging Behavior: Physical Aggression • Operational Definition: When Tim doesn’t get his way or tries to get someone’s attention, he will often use physical aggression (hit, pull hair, spit) to meet his needs. 3. Hypothesis • Tim is displaying physically aggressive behavior to get attention from his peers. 4. Identified Target Behavior & Operational Definition • Target Behavior: Ask to Play • Operational Definition: When Tim…

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