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Sample An Abstract of a Thesis
Extraction,Isolation and Characterization of Bioactive Compounds from Plants'Extracts
Natural products from medicinal plants,either as pure compounds or as standardized extracts,provide unlimited opportunities for new drug leads because of the unmatched availability of chemical diversity.Owing to an increasing demand for chemical diversity in screening programs,seeking therapeutic drugs from natural products,interest particularly in edible plants has grown throughout the world.Botanicals and herbal preparations for medicinal usage contain various types of bioactive compounds.The focus of this paper is on the analytical methodologies,which include the extraction,isolation and characterization of active ingredients in botanicals and herbal preparations.The common problems and key challenges in the extraction,isolation and characterization of active ingredients in botanicals and herbal preparations are discussed.As extraction is the most important step in the analysis of constituents present in botanicals and herbal preparations,the strengths and weaknesses of different extraction techniques are discussed.The analyses of bioactive compounds present in the plant extracts involving the applications of common phytochemical screening assays,chromatographic techniques such as HPLC and TLC as well as nonchromatographic techniques such as immunoassay and Fourier Transform Infra Red(FTIR)are discussed.
Read the sample abstract and work in pairs to complete the sentences by translating the parts given in Chinese.
1.Natural products from medicinal plants，either as pure compounds or as standardized extracts，___________________________________（为新的先导药物开发提供无限机会）because of the unmatched availability of chemical diversity.
2.___________________________________（由于对化学多样性需求的日益增加）in screening programs，seeking therapeutic drugs from natural products，interest particularly in edible plants has grown throughout the world.
3.___________________________________（本文的侧重点在于分析方法），which include the extraction，isolation and characterization of active ingredients in botanicals and herbal preparations.
4.___________________________________（普遍的问题和主要的挑战）in the extraction，isolation and characterization of active ingredients in botanicals and herbal preparations are discussed.
5.As extraction is the most important step in the analysis of constituents present in botanicals and herbal preparations，___________________________________（不同提炼技术的优点和缺点）are discussed.
6.___________________________________（植物提取物中呈现的生物活性化合物分析）involving the applications of common phytochemical screening assays and chromatographic techniques are discussed.
Read the following abstract and fill in the blanks by analyzing the abstract constituents.
A Review of Subcritical Water as a Solvent and Its Utilisation for the Processing of Hydrophobic Organic Compounds
The popularity of using subcritical water as a solvent to extract a variety of organic compounds has grown over the last 10 years.A number of review articles have identified subcritical water as an effective solvent,catalyst and reactant for hydrolytic conversions and extractions.The aim of this paper is to review the literature that describes subcritical water purely as a solvent for solubilizing HOCs.The literature reviewed includes publications on subcritical water extraction,publications on the measurement of the solubility of organic compounds in subcritical water,the use of the solubility data in solubility modeling and a recently developed particle formation technique.
Introduction:____________________________________________
The aim of the paper:____________________________________________
The range of the literatu rereview:____________________________________________
Workplace Project
Work in groups to make an oral summary about the development of modern chemistry,then write down your own report,which should at least include:
1.The role of modern chemistry;
2.The relations between chemistry and sustainable economy;
3.A case study about the societal benefits of a chemical product.
Work in groups to prepare a PPT presentation of the report in Task 17 and then make the presentation in class.
Career Salon
Why Study Chemistry?
Chemistry is everywhere in the world around you!Chemistry sometimes is called the"central science"because it connects other sciences to each others,such as biology,physics,geology and environmental science.Here are some of the best reasons to study chemistry.
1.Chemistry helps you to understand the world around you.Why do leaves change color in the fall?Why are plants green?How is cheese made?What is in soap and how does it clean?These are all questions that can be answered by applying chemistry.
2.A basic understanding of chemistry helps you to read and understand product labels.
3.Chemistry can help you make informed decisions.Will a product work as advertised or is it a scam?If you understand how chemistry works you'll be able to separate reasonable expectations from pure fiction.
4.Chemistry is at the heart of cooking.If you understand the chemical reactions involved in making baked goods rise or neutralizing acidity or thickening sauces,chances are you'll be a better cook.
5.A command of chemistry can help keep you safe!You'll know which household chemicals are dangerous to keep together or mix and which can be used safely.
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