On the Structure of 1,2,3,6-Tetra-O-acetyl-β-D-glucose

Bonner, William A.

doi:10.1021/ja01547a056

Cited by 16 publications

(9 citation statements)

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“…26,27 Stokes and Robinson 13 show that for a solution containing i-solutes, the activity coefficient for solute k is given by eqn. (41) where m k is the molality of solute. In a solution where solute k is the only solute C k is the activity coefficient of solute k.…”

Section: H~1mentioning

confidence: 99%

“…In the context of the thermodynamic properties of aqueous solutions, activity coefficients of salts in aqueous solution have received most attention. 34 The scientific literature dealing with osmotic coefficients of aqueous salt solutions contains detailed reports concerning a vast range of salts in aqueous solution including polyvalent electrolytes 35 and alkaline earth metal halides, 36 and information concerning alkylammonium salts, [37][38][39][40] trifluoroacetates, 41 lanthanum nitrate, 42 Tris sulfate, 43 nickel chloride, 44 sodium dithionate, 45 calcium chloride, 46 caesium chloride, 47 ammonium thiocyanate, 48 and ammonium bromide. 49 The impact on practical osmotic coefficients of changing the solvent from water to deuterium oxide has been studied.…”

Section: H~1mentioning

confidence: 99%

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Activity of water in aqueous systems; A frequently neglected property

et al. 2005

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In this critical review, the significance of the term 'activity' is examined in the context of the properties of aqueous solutions. The dependence of the activity of water(,) at ambient pressure and 298.15 K on solute molality is examined for aqueous solutions containing neutral solutes, mixtures of neutral solutes and salts. Addition of a solute to water(,) always lowers its thermodynamic activity. For some solutes the stabilisation of water(,) is less than and for others more than in the case where the thermodynamic properties of the aqueous solution are ideal. In one approach this pattern is accounted for in terms of hydrate formation. Alternatively the pattern is analysed in terms of the dependence of practical osmotic coefficients on the composition of the aqueous solution and then in terms of solute-solute interactions. For salt solutions the dependence of the activity of water on salt molalities is compared with that predicted by the Debye-Hü ckel limiting law. The analysis is extended to consideration of the activities of water in binary aqueous mixtures. The dependence on mole fraction composition of the activity of water in binary aqueous mixtures is examined. Different experimental methods for determining the activity of water in aqueous solutions are critically reviewed. The role of water activity is noted in a biochemical context, with reference to the quality, stability and safety of food and finally with regard to health science.

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Section: H~1mentioning

confidence: 99%

Section: H~1mentioning

confidence: 99%

Activity of water in aqueous systems; A frequently neglected property

et al. 2005

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“…NOESY and COSY characterization of the two products revealed that the more rapidly formed product consists of the MceA analogue liked to C4’ of glycosylated enterobactin. The final product, linked to the sugar at C6’, forms spontaneously in base, a migration that is not without precedent 344, 347–352…”

Section: Main-chain Modificationsmentioning

confidence: 99%

“…344 The final product, linked to the sugar at C6 0 , forms spontaneously in base, a migration that is not without precedent. 344,[347][348][349][350][351][352] Comparison to NRPs. Microcin E492m is of particular interest here owing to the unprecedented intersection of ribosomal and nonribosomal biosynthetic pathways.…”

Section: Glycosylation/siderophoresmentioning

confidence: 99%

Ribosomal peptide natural products: bridging the ribosomal and nonribosomal worlds

2009

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Ribosomally synthesized bacterial natural products rival the nonribosomal peptides in their structural and functional diversity. The last decade has seen substantial progress in the identification and characterization of biosynthetic pathways leading to ribosomal peptide natural products with new and unusual structural motifs. In some of these cases, the motifs are similar to those found in nonribosomal peptides, and many are constructed by convergent or even paralogous enzymes. Here, we summarize the major structural and biosynthetic categories of ribosomally synthesized bacterial natural products and, where applicable, compare them to their homologs from nonribosomal biosynthesis.

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“…Combining the extracts, drying over sodium hydroxide, and distilling the ether, gave a residual oil which was fractionated at 6-7 mm. to give 7.5 g. of a pale yellow liquid boiling (9) The pharmacological testing was carried out by Scientific Associates, St. Louis, Mo.…”

mentioning

confidence: 99%