Reactions of the dirhenium(III) carboxylate complexes Re2(O2CR)2X4L2 (R = Me, Et; X = Cl, Br; L = H2O, 4-Mepy) with 2-hydroxypyridine (Hhp) and 2-hydroxy-6-methylpyridine (Hmhp). Isolation and structural characterization of complexes of the types Re2(hp)2X4.cntdot.Hhp and Re2(mhp)2X4.cntdot.Hmhp and hydrolysis of nitriles (R'CN) to give the carboxylate-bridged species Re2(.mu.-O2CR')(mhp)2X3

1988 ◽  
Vol 27 (2) ◽  
pp. 287-292 ◽  
Author(s):  
Ann R. Cutler ◽  
Sylvia M. V. Esjornson ◽  
Phillip E. Fanwick ◽  
Richard A. Walton
Keyword(s):  
Structural Characterization ◽  
Carboxylate Complexes ◽  
Hydrolysis Of

Synthesis and Structural Characterization of a Terminal Hydroxide Containing Alumoxane via Hydrolysis of Aluminum Hydrides

2004 ◽  
Vol 43 (4) ◽  
pp. 1217-1219 ◽  
Author(s):  
Ying Peng ◽  
Guangcai Bai ◽  
Hongjun Fan ◽  
Denis Vidovic ◽  
Herbert W. Roesky ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Aluminum Hydrides ◽  
Hydrolysis Of

scholarly journals Characterization of O-Acetylation of N-Acetylglucosamine

2011 ◽  
Vol 286 (27) ◽  
pp. 23950-23958 ◽  
Author(s):  
Elvis Bernard ◽  
Thomas Rolain ◽  
Pascal Courtin ◽  
Alain Guillot ◽  
Philippe Langella ◽  
...  
Keyword(s):  
Cell Wall ◽  
Structural Characterization ◽  
Bacterial Species ◽  
Muramic Acid ◽  
Gram Positive Bacteria ◽  
Mutant Strains ◽  
Encoding Genes ◽  
Hydrolysis Of ◽  
Cell Wall Hydrolysis

Peptidoglycan (PG) N-acetyl muramic acid (MurNAc) O-acetylation is widely spread in Gram-positive bacteria and is generally associated with resistance against lysozyme and endogenous autolysins. We report here the presence of O-acetylation on N-acetylglucosamine (GlcNAc) in Lactobacillus plantarum PG. This modification of glycan strands was never described in bacteria. Fine structural characterization of acetylated muropeptides released from L. plantarum PG demonstrated that both MurNAc and GlcNAc are O-acetylated in this species. These two PG post-modifications rely on two dedicated O-acetyltransferase encoding genes, named oatA and oatB, respectively. By analyzing the resistance to cell wall hydrolysis of mutant strains, we showed that GlcNAc O-acetylation inhibits N-acetylglucosaminidase Acm2, the major L. plantarum autolysin. In this bacterial species, inactivation of oatA, encoding MurNAc O-acetyltransferase, resulted in marked sensitivity to lysozyme. Moreover, MurNAc over-O-acetylation was shown to activate autolysis through the putative N-acetylmuramoyl-l-alanine amidase LytH enzyme. Our data indicate that in L. plantarum, two different O-acetyltransferases play original and antagonistic roles in the modulation of the activity of endogenous autolysins.

Controlled hydrolysis of aryltellurium trichlorides using 2-pyrrolidinones: isolation and structural characterization of monomeric aryltellurium(IV) monohydroxides

RSC Advances ◽  
2011 ◽  
Vol 1 (5) ◽  
pp. 808 ◽  
Author(s):  
Shafalika Misra ◽  
Ashok K. S. Chauhan ◽  
Ramesh C. Srivastava ◽  
Andrew Duthie ◽  
R. J. Butcher
Keyword(s):  
Structural Characterization ◽  
Hydrolysis Of ◽  
Controlled Hydrolysis

Hydrolysis of tri-tert-butylaluminum: the first structural characterization of alkylalumoxanes [(R2Al)2O]n and (RAlO)n

1993 ◽  
Vol 115 (12) ◽  
pp. 4971-4984 ◽  
Author(s):  
Mark R. Mason ◽  
Janna M. Smith ◽  
Simon G. Bott ◽  
Andrew R. Barron
Keyword(s):  
Structural Characterization ◽  
Hydrolysis Of
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