Ultrasonic Absorption in Aqueous Solutions of Deoxyribose Nucleic Acid
نویسندگان
چکیده
منابع مشابه
Ultrasonic investigation of aqueous solutions of deoxyribose nucleic acid.
The ultrasonic absorption of aqueous solutions of salmon sperm deoxyribose nucleic acid (DNA), molecular weight of the order of 106, was determined as a function of pH in the neutral and acidic regions over the frequency range 5-50 MHz at 25øC. Tile viscous relaxation frequencies appear to be well below 1 MHz. At neutral pH values, viscosity and molecular conformation appear to contribute littl...
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of an internal rotation; the greater time for the carbon compound indicates some frictional resistance to rotation. Both dimethoxy compounds have similar relaxation times, as also have the tetramethoxy compounds. The greater size and substantially higher dipole moments of the silicon compounds, however, should produce a proportionately greater contribution from the molecular tumbling motion. Th...
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The ultrasonic amlfiiLudc absorl)liou coelhcient has Iveen determined in aqueous solutions of four molecular weights (73 000, 186 000, 370 000, and 2 {DO 000) of dextran, a linear • (! --• 6) anhydroglucoae polysaccharide of biological origin, over the frequency range 3-69 Mc/sec at 22øC. It is found that the concentrationfree absorption spectrum exhibits a remarkable similarit)' to that of aqu...
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A structure for nucleic acid has already been proposed by Pauling and Corey (1). They kindly made their manuscript available to us in advance of publication. Their model consists of three intertwined chains, with the phosphates near the fibre axis, and the bases on the outside. In our opinion, this structure is unsatisfactory for two reasons: (1) We believe that the material which gives the X-r...
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The data previously reported on the enthalpy of hydration, partial molar volumes and heat capacities of alkylated pyrimidine nucleic acid bases, e.g. uracil, thymine and cytosine, were correlated with the following structural parameters: molecular volume, volume of solvation shell, accessible molecular surface area and its atomic partition as well as and electrostatic potential charge. The simp...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1972
ISSN: 0001-4966
DOI: 10.1121/1.1981641