In the Polaroid design the membrane is a special foil consisting of a Kempton® film coated with gold. The foil is stretched over a V-grooved plate‚ Figure 2.5. The transducer is protected by stainless steel housing. A few models with different housings are available. The sizes of these transducers are the main drawback since they are from 30 up to 45 mm in diameter. A further analysis of this structure and its dynamic features is found in [Attila et. al.‚ 1995]. The piezoelectric transducer is based
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2.5. Characterization Methods 1H–NMR and 13C–NMR spectra of HPPP‚ BOMP and HVPA were taken in CDCl3 on Bruker DPX–300 MHz spectrometer using tetramethylsilane (TMS) as an internal standard. FT–IR spectra of the synthesized compounds‚ HPPP‚ BOMP‚ HVPA and photocrosslinked polymers were recorded on Perkin-Elmer system 2000 (4000–400 cm–1) spectrometer‚ using KBr pellets. Medium pressure mercury vapour lamp to the power output of 125W/cm2 was used for the photocrosslinking study. The viscosity of the
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then were casted by dipping method after the NRL formulation was pre-vulcanized at 70oC. The observed parameter includes crosslink density‚ tensile strength‚ tensile modulus and elongation at break. The morphology of film was studied via Scanning Electron Microscope (SEM). The results
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This standard has been approved for use by agencies of the Department of Defense. 1. Scope 1.1 The primary objective of metallographic examinations is to reveal the constituents and structure of metals and their alloys by means of the light microscope. In special cases‚ the objective of the examination may require the development of less detail than in other cases but‚ under nearly all conditions‚ the proper selection and preparation of the specimen is of major importance. Because of the
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following agitation at different speeds was determined. Seeding efficiency was determined using the Hoechst 33258 assay‚ and cell viability was assessed using the Alamar Blue™ assay. The distribution of cells within the scaffolds was imaged using scanning electron microscopy. It was found that the optimum seeding conditions varied for HOSTE85 cells and bovine chondrocytes‚ with different agitation speeds leading to different seeding efficiencies‚ cell viabilities‚ and distributions of cells within scaffolds
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The winged bean (Psophocarpus tetragonolobus) is a twining‚ perennial herbaceous legume which can climb to 3-4 meters (Kantha and Erdman‚ 1985). As a leguminous plant‚ winged bean can be used in almost all parts of the plant. Fruit‚ leaves‚ flowers‚ bulbs and seed are edible and contain high protein and oil (Kotaru et al.‚ 1987; Dwiani et al.‚ 2014). The mature‚ dry seed is the most nutritious part of the winged bean. Their outstanding nutritive quality is based‚ above all‚ on their high protein
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abstract. I pictured the world on nano scale as chaos‚ because I thought that it is not possible for billions of atoms to work in some kinds of orders. Therefore‚ I am astonished of how Mother Nature works. Everything has its place. It is amazing that electrons‚ which can move at hundreds meters per second‚ can stay within the orbital of a 10-14 m atom. Diamonds and graphite are essentially the same in nature – carbon‚ but a difference between the arrangements – sp2 and sp3 hybridization – is all it needs
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A microscope (from the Ancient Greek: μικρός‚ mikrós‚ "small" and σκοπεῖν‚ skopeîn‚ "to look" or "see") is an instrument used to see objects that are too small for the naked eye. The science of investigating small objects using such an instrument is called microscopy.Microscopic means invisible to the eye unless aided by a microscope. There are many types of microscopes‚ the most common and first to be invented is theoptical microscope which uses light to image the sample. Other major types of microscopes
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Ecosystem‚ and Biosphere A light microscope would focus visible light waves. Light microscopes can magnify up to 1‚000x and can see living things. Electron Microscopes would focus beams of electrons & can magnify up to 1‚000‚000x. Electron microscopes can only be used after water is taken out. Electron microscopes can see smaller than 0.2 micrometer. A light microscope cannot magnify anything smaller than 0.2 micrometer. Transmission Electron Microscopes can see thin objects and can reveal
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Use pages 6C-13C of your textbook. 1. What are cells? 2. When was the first microscope invented? 3. What is a microscope? 4. What is the difference between a simple and compound microscope? 5. Who was one of the first people to observe cells? 6. What did Anton van Leeuwenhoek discover? 7. A Scanning Tunneling Microscope (STM) can magnify a specimen up to how many times? 8. What did Matthias Schleiden
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