References of "1969"
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See detailLa mer et les hommes
Dubuisson, Marcel ULg

Speech (1969)

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See detailThe occurrence of the NII 4176 Å emission line in connection with type-B auroras
Gérard, Jean-Claude ULg; Harang, Ove E

in Planetary and Space Science (1969), 17

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See detailThe primary structure of bacterial wall peptidoglycans
Ghuysen, Jean-Marie ULg; Leyh-Bouille, Mélina; Salton, M. R. J.

in Journal of General Microbiology (1969, August 01), 57(3), -

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See detailChemical structure of the cell wall of Mycobacterium smegmatis. I. Isolation and partial characterization of the peptidoglycan
Petit, J. F.; Adam, A.; Wietzerbin-Falszpan, J. et al

in Biochemical & Biophysical Research Communications (1969), 35(4), 478-485

Cell walls of were prepared by French press disruption and treatment with trypsin and chymotrypsin. Free lipids were extracted by organic solvents. Part of the bound lipids were solubilized by an alkaline ... [more ▼]

Cell walls of were prepared by French press disruption and treatment with trypsin and chymotrypsin. Free lipids were extracted by organic solvents. Part of the bound lipids were solubilized by an alkaline treatment and most of the remaining lipids and neutral sugars by mild acid hydrolysis, leaving an insoluble residue which has the composition of a peptidoglycan. This residue was solubilized by AL1 enzyme. It was possible to isolate from the lysate a tripeptide Ala-Glu-DAP, three tetrapeptides Ala-Glu-DAP-Ala and also a tetrasaccharide and a disaccharide which give equimolar amounts of glucosamine and muramic acid after acid hydrolysis. The disaccharide differs from the typical [beta]-1,4-N-acetylglucosaminyl-N-acetylmuramic acid by its Rf values in various solvents. [less ▲]

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See detailCharacterization of the Micrococcus lysodeikticus type of peptidoglycan in walls of other Micrococcaceae
Campbell, J. N.; Leyh-Bouille, Mélina; Ghuysen, Jean-Marie ULg

in Biochemistry (1969), 8(1), 193-200

Peptidoglycans in walls of Micrococcus lysodeikticus, Micrococcus flavus, Micrococcus citreus, and Sarcina lutea are, composed of Nα-[L-alanyl-γ-(α-D-glutamylglycine)]-L-lysyl-D-alanine subunits, cross ... [more ▼]

Peptidoglycans in walls of Micrococcus lysodeikticus, Micrococcus flavus, Micrococcus citreus, and Sarcina lutea are, composed of Nα-[L-alanyl-γ-(α-D-glutamylglycine)]-L-lysyl-D-alanine subunits, cross-linked through D-alanyl-L-alanine and Nє-(D-alanyl)-L-lysine linkages, and do not contain any additional intervening amino acids. The D-alanyl-L-alanine peptide cross-linkages largely predominate. Although the number of peptide subunits is generally, but not always, greater than the number of disaccharide units in the glycan moiety, not all of the N-acetylmuramic acid residues are peptide substituted. Such a structure is of taxonomic importance since it differentiates the four aforementioned species from other members of the family Micrococcaceae. In Micrococcus lysodeikticus, Micrococcus flavus, and Sarcina lutea, segments of the glycan, consisting of 8-18 disaccharide units, are linked through 1 muramic acid phosphate to a segment, consisting of about 10 glucose residues, of a second wall polymer. [less ▲]

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See detailStructure of the meso-diaminopimelic acid containing peptidoglycans in Escherichia coli B and Bacillus megaterium KM
Van Heijenoort, Jean; Elbaz, Lydia; Dezelee, Philippe et al

in Biochemistry (1969), 8(1), 207-213

The peptide subunit of the peptidoglycan of the envelope of Escherichia coli B has the sequence L-Ala-γ-D-Glu-(L)-meso-diaminopimelic acid-(L)-D-Ala. D-Ala-(D)-meso diaminopimelic acid linkages are ... [more ▼]

The peptide subunit of the peptidoglycan of the envelope of Escherichia coli B has the sequence L-Ala-γ-D-Glu-(L)-meso-diaminopimelic acid-(L)-D-Ala. D-Ala-(D)-meso diaminopimelic acid linkages are involved in the cross-linking between peptide subunits. A major part of the wall peptidoglycan of Bacillus megaterium KM is composed of the same aforementioned peptide subunits and peptide cross-linkages. In this latter case, however, the D-Ala-(D)-meso-diaminopimelic acid linkages are not the only important ones. As previously shown, about 15% of the diaminopimelic acid residues are DD and they seem to be involved in another type of peptide cross-linkage. Streptomyces KM endopeptidase solubilizes the walls of Bacillus megaterium. Although this enzyme is not lytic upon Escherichia coli envelope, it liberates disaccharide peptide monomer from a bis-disaccharide peptide dimer, isolated from the same envelope. This dimer is composed of two β-1,4-N-acetylglucosaminyl-N-acetylmuramyl-L-Ala-γ-D-Glu-(L)-meso-diaminopimelic acid-(L)-D-Ala units, joined by a D-Ala-(D)-meso-diaminopimelic acid linkage. [less ▲]

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See detailThe peptidoglycan in walls of Butyribacterium rettgeri
Guinand, Micheline; Ghuysen, Jean-Marie ULg; Schleifer, Karl H. et al

in Biochemistry (1969), 8(1), 200-207

The wall peptidoglycan in Butyribacterium rettgeri is composed of Nα-(L-seryl-γ-D-glutamyl)-L-ornithyl-D-alanine subunits. The peptide subunits are cross-linked by means of a D-lysine or a D-ornithine ... [more ▼]

The wall peptidoglycan in Butyribacterium rettgeri is composed of Nα-(L-seryl-γ-D-glutamyl)-L-ornithyl-D-alanine subunits. The peptide subunits are cross-linked by means of a D-lysine or a D-ornithine residue, extending from the α-carboxyl group of the glutamic acid of one peptide subunit, to which D-lysine is linked through its є-amino group or D-ornithine through its δ-amino group, to the carboxyl group of the C-terminal D-alanine residue of another peptide subunit. D-Lysine and D-ornithine bridges occur in the ratio of 2:1. The Streptomyces KM endopeptidase hydrolyses the Nα-( D-alanyl)-D-lysine and Nα-(D-alanyl)-D-ornithine linkages and causes wall solubilization. The walls, as they are prepared, have a low degree of cross-linking. About 59% of the peptide subunits occur as monomers (18%), dimers (24%), and trimers (17%). Higher oligomers account for the remaining 41 %. The disaccharide units obtained after sequential treatment with Streptomyces F1 endo-N-acetylmuramidase and Streptomyces N-acetylmuramyl-L-alanine amidase are all β-1,4-N-acetylglucosaminyl-N-acetylmuramic acid. [less ▲]

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See detailInterprétation d'une photo aérienne de Campine
Merenne-Schoumaker, Bernadette ULg

in La Géographie (1969), (82), 157-164

Présentation d'une région géographique belge au départ d'une photo aérienne en vue d'un cours dans l'enseignement secondaire

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See detailConsiderations of the forbidden lines of iron in the states from Fe0 to Fe6+
Swings, Polydore ULg; Swings, Jean-Pierre ULg

in Les Transitions interdites dans les spectres des astres (1969)

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See detailFree radicals in astrophysics.
Swings, Polydore ULg

in Mémoires de la Societe Royale des Sciences de Liège (1969), XVIII(3), 7-26

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See detailVenus through a spectroscope
Swings, Polydore ULg

in Proceedings of the American Philosophical Society (1969), 113(3), 229-246

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See detailConsideration of the forbidden lines of iron in the states from Fe0 to Fe6+
Swings, Polydore ULg; Swings, Jean-Pierre ULg

in Mémoires de la Societe Royale des Sciences de Liège (1969), 17

The iron atom which has a fairly high cosmic abundance presents the great interest of appearing in a wide variety of stars and nebulae, at many stages of ionization, and of revealing forbidden transitions ... [more ▼]

The iron atom which has a fairly high cosmic abundance presents the great interest of appearing in a wide variety of stars and nebulae, at many stages of ionization, and of revealing forbidden transitions in emission in many of these ionization stages. The present paper discusses the following topics : (a) the case of the as yet undiscovered forbidden lines of neutral iron (Fe0) ; (b) some recently acquired astronomical information on the forbidden lines of the stages Fe+ to Fe6+ ; (c) general considerations on the important information revealed by these forbidden lines of iron on the physical structure and excitation mechanisms which are present in the emission line stars of early and late types. For lack of time we give only a very summarized version of our paper ; a complete text will appear later. [less ▲]

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See detailLe commerce de détail à Namur
Merenne-Schoumaker, Bernadette ULg

in Namur 1980 (Ed.) Hôtellerie et commerce de détail à Namur (1969)

Study of the structure, location and trade appealing areas of retail in Namur, based on a systematic field survey in April 1967 (1443 points of sale)

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See detailL'influence du tourisme sur le commerce. Le cas de Fréjus (Var, France).
Merenne-Schoumaker, Bernadette ULg

in Bulletin de la Société Géographique de Liège (1969), (5), 37-86

Test measurement of the impact of tourism on the structure, the location and the quality level of shops in the town of Frejus (Var, France)

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See detailL'oxygénothérapie hyperbare. Principes généraux. Résultats.
Hanquet, Marcel; Lamy, Maurice ULg

in Revue Médicale de Liège (1969), 24(10), 408-12

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See detailCinquante cas d'intoxication oxycarbonée traités par l'oxygénathérapie hyperbare
Lamy, Maurice ULg; Hanquet, Marcel

in Acta Anaesthesiologica Belgica (1969), 20

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See detailIntérêt de l'oxygénothérapie hyperbare
Lamy, Maurice ULg; Hanquet, Marcel

in Acta Tuberculosea et Pneumologica Belgica (1969), 60

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See detailL'air du temps. Culture, culte de masse
Mormont, Christian ULg

in Feuillets Psychiatriques de Liège (1969), 2

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See detailConsidérations sur la haute atmosphère pendant une aurore polaire
Gérard, Jean-Claude ULg

in Bulletin de la Société Royale des Sciences de Liège (1969)

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