1. EGG INOCULATION The fertile hen’s egg can be used to cultivate and propagate various types of viruses. Because of the ability to alter their tropism and to adapt to a new host species‚ many viruses become capable of growing in chick embryo tissues wherein they frequently attain a much higher concentration than in the tissues of the natural host. STRUCTURE OF AN EGG The extra-embryonic membranes of the chick embryo arise from three germinal layers: the endoderm‚ mesoderm and ectoderm
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It is true that we live in a throw-away society. So‚ protecting the environment is essential for the quality of life of current and future generations. The challenge is to combine this with continuing economic growth in a way which is sustainable over the long term. Interest in determining costs and benefits is increasing in the environmental field. The possibilities for performing cost-benefit analyses in the waste area depend‚ however‚ on what is known about the actual emissions or discharges
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Solid Waste Management in Mumbai Mumbai has a coastal stretch of 603 sq km. Geographically‚ the city of Mumbai can be divided into three sections‚ namely‚ the island city (or main city)‚ the western suburbs and the eastern suburbs. These are also known for administrative purposes as Division I‚ Division II and Division III‚ respectively. The total population of the city amounts to nearly 13million that is increasing on a daily basis. Such a huge habitat obviously generates a huge amount of waste
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COMPANY PROFILE Royal Dutch Shell plc REFERENCE CODE: D92F7766-4521-4359-857D-3E0F3A288EAB PUBLICATION DATE: 6 Feb 2015 www.marketline.com COPYRIGHT MARKETLINE. THIS CONTENT IS A LICENSED PRODUCT AND IS NOT TO BE PHOTOCOPIED OR DISTRIBUTED. Royal Dutch Shell plc TABLE OF CONTENTS TABLE OF CONTENTS Company Overview..............................................................................................3 Key Facts...........................................................................
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Introduction In order to understand what HPLC‚ that is‚ High Performance Chromatography‚ it is necessary to understand the meaning of the term chromatography itself. Chromatography Chromatography is defined as a procedure by which inert materials and drug principles encountered in pharmaceuticals preparations are separated by fractional extraction‚ adsorption‚ or ion exchange on a porous solid. Chromatography is particularly useful as a means of separating and purifying complex and closely
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Introduction – This paper contains a general overview of the greenhouse effect and a deep understanding about the global warming phenomena. It includes general background knowledge about greenhouse as well as how does human action contribute and influence its effect. This paper also highlights on the nature and fundamental causes of greenhouse gases. The term of Greenhouse: A greenhouse which is also known as a glasshouse is an architectural building with roof and walls made from glass or
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Plastic This is the most common packaging material and‚ at the same time‚ one of the most difficult to dispose of. The factors common to all plastics are that they are light‚ strong cheap to manufacture. It is for these reasons that they are used so much‚ as an alternative to cardboard glass packaging materials. Almost 10% of our rubbish consists of different types of plastic. They are a problem in landfills as they are bulky‚ they contaminate degrade slowly. Separated the rest of the waste
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his work ° I like the titles he uses in association with the work I like the materials he uses: Martin Creed uses materials from the everyday world to create his art. He will often use office supplies such as clean white paper‚ blue tack‚ polystyrene and cardboard. What interests me about using such materials is that he places these common supplies‚ used in a common way in an elitist arena such as a gallery. He is using materials which are considered low art’ materials and places them in a
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0.2 Cellulose loose-fill 3 - 3.8 Fiberglass loose-fill 2.5 - 3.7 Glass 0.14 Open-cell polyurethane spray foam 3.6 Phenolic rigid panel 4 - 5 Phenolic spray foam 4.8 - 7 Polyethylene foam 3 Polyisocyanurate spray foam 4.3 - 8.3 Polystyrene board 5 Poured concrete 0.08 Wood panels‚ such as sheathing 2.5 Together these materials
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ABSTRACT For many years‚ the use of natural polymers for the fabrication of packaging materials has been an interesting alternative to replace non-biodegradable polymers which are normal components of these materials. The core problem of these starch based plastics is their hydrophilic character and the fact that they tend to become brittle with ageing. Unmodified starch is too much hydrophilic to be used as food packaging material. Chemical modification must be carried out in order to make them
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