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Topic: Nitrogeneous bases


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DNA

In the News (Mon 28 Dec 09)

  
  Low Dose Radiation Research Program
Base Pair: Two nitrogeneous bases (adenine and thymine) or (guanine and cytosine) held together in DNA by weak bonds forming a double helix.
Based on the use of physical models for doses to target cells combined with data from epidemiological studies of human exposures from other types of radiation; used to predict risk from radiation types for which no human data is available.
Nucleotide: A subunit of DNA or RNA consisting of a nitrogenous base (adenine, guanine, thymine, or cytosine in DNA; adenine, guanine, uracil, or cytosine in RNA), a phosphate molecule, and a sugar molecule (deoxyribose in DNA and ribose in RNA).
www.lowdose.energy.gov /glossary.htm   (8933 words)

  
  Low Dose Radiation Research Program
Base Pair: Two nitrogeneous bases (adenine and thymine) or (guanine and cytosine) held together in DNA by weak bonds forming a double helix.
Based on the use of physical models for doses to target cells combined with data from epidemiological studies of human exposures from other types of radiation; used to predict risk from radiation types for which no human data is available.
Nucleotide: A subunit of DNA or RNA consisting of a nitrogenous base (adenine, guanine, thymine, or cytosine in DNA; adenine, guanine, uracil, or cytosine in RNA), a phosphate molecule, and a sugar molecule (deoxyribose in DNA and ribose in RNA).
lowdose.tricity.wsu.edu /glossary.htm   (8933 words)

  
 Reduction of isomerization in solution process for polymerization of alpha-olefins - Patent 4701504   (Site not responding. Last check: 2007-10-18)
The catalyst is deactivated by sequentially admixing therewith a minor amount of a nitrogenous base, especially an aqueous solution of such a base, followed by a solution of a salt of an alkaline earth metal or zinc and an aliphatic monocarboxylic acid dissolved in hydrocarbon solvent.
The process of claim 1 in which the nitrogenous base of step (a) is in the form of an aqueous solution and the amount of nitrogenous base plus water is not more than 2.5 mole of said base plus water per mole of halogen plus alkyl radicals in the coordination catalyst.
The by-products formed when nitrogenous base, and water, are used as deactivator tend to be of low volatility whereas the by-products formed when organic deactivators are used tend to be aldehydes, ketones, organic acids and the like.
www.freepatentsonline.com /4701504.html   (3595 words)

  
 Foundation to Eradicate Duchenne, Duchenne Muscular Dystrophy
Cytosine - One of the four types of nitrogenous bases found in DNA, having the single-ring structure of a class known as pyrimidines.
Guanine - One of the four types of nitrogenous bases found in DNA, having the double-ring structure of a class known as purines.
The structure is of ribose units joined in the 3' and 5' positions through a phosphodiester linkage with a purine or pyrimidine base attached to the 1' position.
www.duchennemd.org /duchenne_glossary.htm   (3295 words)

  
 Advanced Molecular Biology I-Nucleic Acids Lecture Notes
Base pairs which have a dyad axis that is perpendicular to the plane of the bases most readily form parallel stranded double-helices, whereas base pairs whose dyad axis is parallel to the plane of the bases most readily for anti-parallel double helices (Figure 23).
The bases in a base pair are usually not coplanar, instead they are twisted about the hydrogen bonds that connect them, like the blades of a propeller.
This parameter measures the degree of departure of the mean plane of the base pairs from the perpendicular helix axis on the short axis of the base pairs.
www.acsu.buffalo.edu /~koudelka/NUCLACID_94.html   (10414 words)

  
 Method for detecting, identifying, and quantitating organisms and viruses - Patent 5288611   (Site not responding. Last check: 2007-10-18)
Genetic analysis includes, for example, the determination of the numbers of ribosomal RNA genes in various organisms; the determination of the similarity between the multiple ribosomal RNA genes which are present in cells, determination of the rate and extent of synthesis of rRNA in cells and the factors which control them.
It is known that the ribosomal RNA gene base sequence is at least partially similar in widely different organisms, and that the DNA of E. coli bacterial ribosomal RNA genes hybridizes well with rRNA from plants, mammals, and a wide variety of other bacterial species.
Hybridization does occur between imperfectly complementary molecules with the result that a certain fraction of the bases in the hybridized region are not paired with the proper complementary base.
www.freepatentsonline.com /5288611.html   (15896 words)

  
 MUSCULAR DYSTROPHY ASSOCIATION - NEUROMUSCULAR RESEARCH INSTITUTE   (Site not responding. Last check: 2007-10-18)
One of the four bases found in DNA, having the double-ring structure of a class known as purines.
One of the four types of nitrogenous bases found in DNA, having the single-ring structure of a class known as pyrimidines.
One of the four types of nitrogenous bases found in DNA, having the double-ring structure of a class known as purines.
www.mda.org.au /research/nrc_gloss.html   (2952 words)

  
 INHS classics - Dr. Herbert Shelton: How much protein?
It is quite clear, however, that greater sobriety in the matter of nitrogen (protein) ingestion is essential not only to achieve a return to health, but also in order to maintain health at its highest peak at all times and for all purposes.
Reinheimer truly says that "nitrogen, the chief ingredient of protein, is universally a good servant, but a bad master." It is well known to physiologists that both fat and protein metabolism depend upon carbohydrate metabolism.
By a careful selection of a low nitrogen diet, it is possible to reduce the amount of work required of the kidneys to a level at which they are able to keep the waste products in the blood within normal limits.
www.naturalhygienesociety.org /articles/shelton2.html   (2648 words)

  
 Dr. Herbert Shelton: How Much Protein? presented by Dr. Bass
It is quite clear, however, that greater sobriety in the matter of nitrogen (protein) ingestion is essential not only to achieve a return to health, but also in order to maintain health at its highest peak at all times and for all purposes.
Reinheimer truly says that "nitrogen, the chief ingredient of protein, is universally a good servant, but a bad master." It is well known to physiologists that both fat and protein metabolism depend upon carbohydrate metabolism.
By a careful selection of a low nitrogen diet, it is possible to reduce the amount of work required of the kidneys to a level at which they are able to keep the waste products in the blood within normal limits.
www.drbass.com /howmuchprotein.html   (3434 words)

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