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1. A company, Polycoat, offers a service to orthopedic companies in which they apply a polymer coating, 100 nm thick, to cobalt-chromium alloy prostheses. The coating contains calcium phosphate particles, 10 nm in diameter. The putative benefits of the coating are: 1) bone will bond to it and 2) water absorbed by the polymer will slowly dissolve the particles thereby releasing calcium, which will favorably affect nearby osteoblasts. You have been hired by an orthopedic company to help them analyze Polycoat-coated prostheses and review data from Polycoat. a) It is important to verify that the calcium phosphate particles are within 5 nm of the surface of the Polycoat coating. Given that you can employ only one of the following methods which would you chose and what would you measure: infrared spectroscopy, ESCA, X-ray diffraction? Explain. b) In reference to the hydrophobic-hydrophilic character of the coating, Polycoat determined the contract angle of water on the surface of the coating. What information would you request about the conditions under which the contact angle measurement was made? What type of contact angle measurement would you require for this coating? 2. The silicone elastomer used to fabricate breast prostheses is normally filled with noncrystalline silica particles, 2 nm in diameter, to give it strength. A question has been raised about whether such particles are actually in a sample of the prosthesis given to you for study. Comment about the appropriateness of each of the following methods for determining if such silica particles are in your sample. a) Scanning electron microscopy b) Transmission electron microscopy c) X-ray diffraction
Short Paper on Cross-cultural Opportunities and Conflicts in Canada.
Sociology are very fundamental in nature. Role strain and role constraint speak about the duties and responsibilities of the roles of people in society or in a group. A short theory about Darwin and Moths is also answered.
This review will help the reader understand the social work profession through different concepts giving the glimpse of why the social work profession might have drifted away from its original purpose of serving the poor.
Schizophrenia does not really have just one single cause. It is a possibility that this disorder could be inherited but not all doctors are sure.
Individual Assignment : Two Models Handout and Rubric, This paper will allow you to understand and evaluate two vastly different organizational models and to effectively communicate their differences.
The following report includes the description about the organization, its strategies, industry analysis in which it operates and its position in the industry.
In this study, we examine how gasoline price volatility and income of the consumers impacts consumer's demand for gasoline.
Economics thesis undergrad 4th year paper to write. it should be about 22 pages in length, literature review, economic analysis and then data or cost benefit analysis.
The paper aims to highlight the global trends in countries and regions where 3G has already been introduced and propose an implementation plan to the telecom operators of developing countries.
Prepare the power point presentation for the case: Santa Fe Independent School District
Information literacy is critically important in this contemporary environment
Write a definition for associative property of multiplication.
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