Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 2 de 2
Filter
Add more filters

Database
Language
Journal subject
Publication year range
1.
Pure Appl Chem ; 95(10)2023.
Article in English | MEDLINE | ID: mdl-37964805

ABSTRACT

The International Union of Pure and Applied Chemistry (IUPAC) has a long tradition of supporting the compilation of chemical data and their evaluation through direct projects, nomenclature and terminology work, and partnerships with international scientific bodies, government agencies and other organizations. The IUPAC Interdivisional Subcommittee on Critical Evaluation of Data (ISCED) has been established to provide guidance on issues related to the evaluation of chemical data. In this first report we define the general principles of the evaluation of scientific data and describe best practices and approaches to data evaluation in chemistry.

2.
FEMS Microbiol Lett ; 221(2): 285-91, 2003 Apr 25.
Article in English | MEDLINE | ID: mdl-12725940

ABSTRACT

It is now well established that physicochemical properties of exopolysaccharides (EPS) can vary between strains of a given species and according to growth conditions. The EPS production of four strains of Lactobacillus bulgaricus was monitored during growth in milk and in a chemically defined media. All strains, including the non-ropy one, produced EPS. The monosaccharide composition, molar mass (M(w)), and intrinsic viscosity of these EPS were determined and compared. Further characterization using high-performance size-exclusion chromatography revealed the presence of two fractions in all EPS: one fraction exhibited a high M(w) and a high intrinsic viscosity while the other had a low M(w) and a low intrinsic viscosity. Strikingly, the EPS synthesized by the non-ropy strain was mainly composed of the low-M(w) fraction while for the ropy strains, the fraction of high M(w) varied between 43 and 90%. According to our results, we propose that the ratio between the high-M(w) and low-M(w) fractions is critical for the texturing properties of L. bulgaricus EPS.


Subject(s)
Lactobacillus/metabolism , Milk/microbiology , Polysaccharides, Bacterial/chemistry , Viscosity , Animals , Culture Media/chemistry , Gene Expression Regulation, Bacterial , Molecular Weight , Polysaccharides, Bacterial/biosynthesis
SELECTION OF CITATIONS
SEARCH DETAIL