Английский язык для студентов физического факультета (90,00 руб.)

Демидова, 2011 2 UNIT I. Introduction to Nanotechnology Nanotechnology is defined as the study and use of structures between 1 nanometer and 100 nanometers in size. <...> To give you an idea of how small that is, it would take eight hundred 100 nanometer particles side by side to match the width of a human hair. <...> Only through the use of powerful microscopes can they hope to ‘see’ and manipulate these nano-sized particles. <...> Because nanotechnology is essentially a set of techniques that allow manipulation of properties at a very small scale, it can have many applications, such as the ones listed below. <...> These RNA strands are attracted to cancer cells. <...> When the nanoparticle encounters a cancer cell it adheres to it and releases the drug into the cancer cell. <...> This directed method of drug delivery producing less has great potential for side harmful effects treating cancer patients while than those produced by conventional chemotherapy. <...> The properties of many conventional materials change when formed as nano-sized particles (nanoparticles). <...> This is generally because nanoparticles have a greater surface area per weight than larger particles; they are therefore more reactive to some other molecules. <...> Nano-sized particles of carbon, (for example nanotubes and bucky balls) are extremely strong. <...> The MEMS technique results in close integration of the mechanical mechanism with the necessary electronic circuit on a single silicon chip, similar to the method used to produce computer chips. <...> There are many different points of view about the nanotechnology. <...> These differences start with the definition of nanotechnology. <...> Some define it as any activity that involves manipulating materials between one nanometer and 100 nanometers. <...> However the original definition of nanotechnology involved building machines at the molecular scale and involves the manipulation of materials on an atomic (about two-tenths of a nanometer) scale. <...> Exercise 1: Translate the following words: to define to match to hamper to allow variety endeavor property treatment to pinpoint target accurately to attach to encounter to adhere 5 to release to improve surface to compose to compare feature tiny to involve to extend lifespan advance impact available to anticipate Exercise 2: Give derivatives from the following words and translate them: Example: to define – definition – definable – definability – definite – definitely effect able to develop possible <...>