579 Atomic force microscopy and other scanning probe microscopies Helen G Hansma and Lía Pietrasanta The highlight of the past year is the unfolding and refolding of the muscle protein titin in the atomic force microscope. A related highlight in the intersection between experiment and theory is a recent review of the effects of molecular forces on biochemical kinetics. Other advances in scanning probe microscopy include entropic brushes, molecular sandwiches and applications of atomic force microscopy
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and some experts caution against a rigid definition based on a sub-100 nm size. Another important criteria for the definition is the requirement that the nano-structure is man-made. Otherwise you would have to include every naturally formed biomolecule and material particle, in effect redefining much of chemistry and molecular biology as 'nanotechnology.' The most important requirement for the nanotechnology definition is that the nano-structure has special properties that are exclusively due
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Iron is a shiny grey metal that is oxidized into a reddish-brown ferric oxide when exposed to moist air. It was discovered in 3500BC and is ranked as the fourth most abundant element by mass. The other major elements are sulfur and nickel. While iron is ingrained in most minerals, the primary iron is haematite. Nonetheless, iron is found engrained in other minerals such as taconite (Royal Society of Chemistry). Iron is produced commercially by heating the iron ores with carbon and limestone. The
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Biotechnology Biotechnology is the way in which man uses other organisms to make useful products. Yeast has been used for centuries to make beer, wine and bread. Moulds have been employed in cheese making, and bacteria in yogurt making. Single- Cell Protein (SCP) Microorganisms are single cell organisms which can be cultured to rapidly produce foodstuffs rich in protein, minerals and vitamins. Microorganisms are grown in large fermenters where nutrient, pH and temperature are constantly monitored
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cell membrane. B) nuclear envelope. C) nucleolus. D) nucleoplasm. E) nucleosome. 4. Cellular foundations Page: 4 Difficulty: 1 The dimensions of living cells are limited, on the lower end by the minimum number of biomolecules necessary for function, and on the upper end by the rate of diffusion of solutes such as oxygen. Except for highly elongated cells, they usually have lengths and diameters in the range of: A) 0.1 μm to 10 μm. B) 0.3 μm to 30 μm.
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Pre-Lab Questions 1. Nitrogen fixation is a natural process by which inert or unreactive forms of nitrogen are transformed into usable nitrogen. Why is this process important to life? The useable nitrogen created, is extremely important since it is used to form DNA, enzymes, and other biological processes. Nitrogen fixation is also important because when it is inert, it is useless for organisms. 2. Given when you have learned about the hydrogen bonding shared between nucleic acids in DNA, which
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1 The analysis of Graphene material Alinur Mirassov, Azat Yerkinova, Gaukhar Balbayeva Madi Aldabergenov, Takhmina Torgayeva Abstract: Recently, graphene has attracted the interest of significant number of scientists and physicians due to its exceptional properties (e.g., large surface area, thermal and chemical stability, high conductivity). This new member of the carbon family has potential to revolutionize the current applications (some of them are described in the essay) as well as
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all mammals undergo the symptoms of Lyme disease like that of the immunopathological response in humans. The parasitic nature of B. burgdorferi is due to the fact that the organism does not possess the genes responsible for synthesis of common biomolecules such as amino acids, nucleotides, and
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BiologyBiology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, evolution, distribution, and taxonomy.[1] Modern biology is a vast and eclectic field, composed of manybranches and subdisciplines. However, despite the broad scope of biology, there are certain general and unifying concepts within it that govern all study and research, consolidating it into single, coherent fields. In general, biology recognizes the cell as the
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Principles and Processes of Isolation of Elements p- Block Elements d and f Block Elements Coordination Compounds Haloalkanes and Haloarenes Alcohols, Phenols and Ethers Aldehydes, Ketones and Carboxylic Acids Organic Compounds Containing Nitrogen Biomolecules Polymers
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