Results 241 to 250 of about 234,091 (293)
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Journal of Dietary Supplements, 2008
Every cell needs energy, i.e., adenosine triphosphate (ATP), to carry out its function. Decreased oxygen levels, decreased blood flow, and other stressful conditions can drastically effect the intracellular concentrations of these energy compounds.
James, Herrick, John, St Cyr
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Every cell needs energy, i.e., adenosine triphosphate (ATP), to carry out its function. Decreased oxygen levels, decreased blood flow, and other stressful conditions can drastically effect the intracellular concentrations of these energy compounds.
James, Herrick, John, St Cyr
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1951
Publisher Summary This chapter discusses the chemistry of ribose and its derivatives, which give ribose on hydrolysis. Yeast nucleic acid is the best source of D -ribose and. The hydrolysis of yeast nucleic acid by sweet almond emulsin gives high yields of guanosine and adenosine and forms a practical basis for the preparation of D -ribose.
R W, JEANLOZ, H G, FLETCHER
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Publisher Summary This chapter discusses the chemistry of ribose and its derivatives, which give ribose on hydrolysis. Yeast nucleic acid is the best source of D -ribose and. The hydrolysis of yeast nucleic acid by sweet almond emulsin gives high yields of guanosine and adenosine and forms a practical basis for the preparation of D -ribose.
R W, JEANLOZ, H G, FLETCHER
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Nature, 1951
DURING the removal of the triphenylmethyl (trityl) group from 1 : 2 : 3-triacetyl 5-trityl D-ribo-furanose, Bredereck, Kothnig and Berger1 observed the formation of a compound to which they assigned the structure 1 : 5-anhydro-D-ribofuranose. Doubts as to the validity of this structure were raised by two of us, and using the method described by the ...
R W, JEANLOZ, G R, BARKER, M V, LOCK
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DURING the removal of the triphenylmethyl (trityl) group from 1 : 2 : 3-triacetyl 5-trityl D-ribo-furanose, Bredereck, Kothnig and Berger1 observed the formation of a compound to which they assigned the structure 1 : 5-anhydro-D-ribofuranose. Doubts as to the validity of this structure were raised by two of us, and using the method described by the ...
R W, JEANLOZ, G R, BARKER, M V, LOCK
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Ribose: More than a simple sugar?
Current Sports Medicine Reports, 2007This article reviews the current literature regarding the use of ribose as an ergogenic aid. Ribose manufacturers claim that it provides ergogenic benefit, but this has not been substantiated through scientific investigations. Data have shown promise that ribose supplementation leads to enhanced restoration of ATP levels following exercise, but this ...
Teginder S, Dhanoa, Jeffrey A, Housner
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EFFECTS OF RIBOSE AS AN ERGOGENIC AID
Journal of Strength and Conditioning Research, 2006The amount of adenosine triphosphate (ATP) stored in the muscle available for immediate use is limited, and once used, must be resynthesized in the muscle. Ribose, a naturally occurring pentose sugar, helps resynthesize ATP for use in muscles. There have been claims that ribose supplements increase ATP levels and improve performance. Other studies have
Willard W, Peveler +2 more
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Cellular Signalling, 1999
The Ca2+-mobilizing natural compound cyclic ADP-ribose was discovered in sea urchin egg homogenates. Recently the involvement of cyclic ADP-ribose in Ca2+ signaling has been demonstrated in diverse biological systems spanning protozoa, plants, and cells from invertebrate, mammalian, and human sources.
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The Ca2+-mobilizing natural compound cyclic ADP-ribose was discovered in sea urchin egg homogenates. Recently the involvement of cyclic ADP-ribose in Ca2+ signaling has been demonstrated in diverse biological systems spanning protozoa, plants, and cells from invertebrate, mammalian, and human sources.
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Synthesis of A New Ribose Modified Analogue of Cyclic Inosine Diphosphate Ribose
Nucleosides, Nucleotides and Nucleic Acids, 2007A new analogue of cyclic inosine diphosphate ribose (cIDPR), in which the N-1 and N-9 ribosyl moieties were substituted by an alkyl moiety and an hydroxy-alkyl chain, has been synthesized and characterized.
OLIVIERO, GIORGIA +6 more
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Coupling of 2,6-Dichloropurine and 2,6-Dichlorodeazapurines with Ribose and Ribose Modified Sugars
Nucleosides and Nucleotides, 1999Abstract Substituted purine and deazapurine nucleosides are of great interest in medicinal chemistry. Furthermore, 3′-deoxynucleosides exhibit a number of biological activities. In this research the coupling of 2,6-dichloro-1- or 3-deazapurine with protected 3′-deoxyribose is reported.
S. Vittori +4 more
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Spectrophotometric analyses of ribose and 2-deoxy-d-ribose alone and in mixtures
Journal of Pharmaceutical Sciences, 1967Abstract The rates of production of the chromophore for ribose (R) and the maximum absorbance of the chromophore for 2-deoxy- d -ribose (DR), produced under thermal and acidic conditions are directly related to their sugar concentrations. These factors are the bases for qualitative and quantitative analysis of these sugars. The λ max .
E R, Garrett, J, Blanch, J K, Seydel
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Efficient syntheses of l-ribose and 2-deoxy l-ribose from d-ribose and l-arabinose
Tetrahedron Letters, 1997Abstract Interconversion of the ends of d -ribose 2 afforded in 6 steps and 45% overall yield l -ribose 1, from which 2-deoxy l -ribose 12 was easily prepared. In addition, the inexpensive l -arabinose 13 was also converted into 2-deoxy l -ribose 12 via a reductive radical rearrangement of the arabinopyranosyl bromide 14.
Michael E. Jung, Yue Xu
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