Chelate chemistry governs ion-specific stiffening of Bacillus subtilis B-1 and Azotobacter vinelandii biofilms

2020 ◽  
Vol 8 (7) ◽  
pp. 1923-1933
Author(s):  
Martin Kretschmer ◽  
Oliver Lieleg
Keyword(s):  
Bacillus Subtilis ◽  
Metal Ions ◽  
Azotobacter Vinelandii ◽  
Chelate Complexes ◽  
Polymer Component ◽  
Complexes With Metal Ions

Depending on the main polymer component of the biofilms studied, chelate complexes with metal ions can be formed that entail an increase in biofilm stiffness.

Synthesis of N2, N6-bis(5-methylthiazol-2-yl)pyridine-2,6-dicarboxamide fluoroscent sensor for detection of Cu2+ and Ni2+ Ions

Drug Research ◽  
2021 ◽  
Author(s):  
Anuroop Kumar ◽  
Netrapal Singh ◽  
Mordhwaj Kumar ◽  
Uma Agarwal
Keyword(s):  
Spectral Analysis ◽  
Detection Limit ◽  
Metal Ions ◽  
1H Nmr Spectroscopy ◽  
Stoichiometric Ratio ◽  
Selective Detection ◽  
Ft Ir ◽  
Uv Visible ◽  
Complexes With Metal Ions ◽  
Competitive Ions

AbstractThis article reports an amide based Chemosensor used for selective detection of divalent Cu+2 and Ni+2 ions via Fluorescence turn off. The selective sensing ability of Chemosensor was investigated in presence of different metal ions Mg2+, Ag+, Fe2+, K+, Cu2+, Ni2+, Hg2+, Pb2+, Mn2+, Pd2+, Cd2+ and Mn3+ as competitive ions. The receptor i. e. Chemosensor formed complexes with metal ions in 1:1 stoichiometric ratio. The detection limit and binding constant calculated as 1.92×10–4 and 1.4×10–4 M and 2.16×103 M−1 and 3.09×103 M−1 for Cu2+ and Ni2+ions respectively. The complexes were characterized by UV/visible, FT-IR, 13C NMR and 1H NMR spectroscopy. Further the structure and Crystallinity were calculated by P-XRD spectral analysis. The crystallinity found to be 65.27 and 67.87% respectively

Effect of metal ions on lipopeptide secretion from Bacillus subtilis strain FJAT‐4: negative regulation by Ca 2+

2021 ◽  
Author(s):  
Meichun Chen ◽  
Meixia Zheng ◽  
Yanping Chen ◽  
Rongfeng Xiao ◽  
Xuefang Zheng ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Metal Ions ◽  
Negative Regulation ◽  
Subtilis Strain

Binuclear metal chelate complexes of anthraquinones having a MO4 chromophore. Part 1. Quinizarin

1987 ◽  
Vol 65 (7) ◽  
pp. 1485-1490 ◽  
Author(s):  
M. N. Bakola-Christianopoulou ◽  
P. D. Akrivos ◽  
M. Baumgarten
Keyword(s):  
Metal Ions ◽  
Magnetic Measurements ◽  
Metal Chelate ◽  
Transition Elements ◽  
Chelate Complexes ◽  
Cobalt Nickel ◽  
Oxygen Donor ◽  
Nickel Copper ◽  
Square Planar ◽  
Coordination Spheres

Homobinuclear metal chelate complexes having 1,4-dihydroxy-9,10-anthracenedione (quinizarin) as a bridging unit have been prepared with four bivalent first row transition elements, namely cobalt, nickel, copper, and zinc. The coordination spheres of the metal ions consist of two nearly equivalent six-membered rings with oxygen donor atoms derived from the quinizarin and the terminal ligands which are either β-diketones or salicylic aldehyde. TG, spectroscopic (ir, uv–vis, epr), and magnetic measurements have been applied to an investigation of the geometry adopted by the MO4 chromophores. The results are consistent with varying degrees of distortion from the ideal square planar toward a tetrahedral arrangement around the metal ions, closely related to the specific metal center involved.

Alternative binding modes of l -histidine guided by metal ions for the activation of the antiterminator protein HutP of Bacillus subtilis

2013 ◽  
Vol 183 (3) ◽  
pp. 512-518 ◽  
Author(s):  
Balasundaresan Dhakshnamoorthy ◽  
Hiroshi Mizuno ◽  
Penmetcha K.R. Kumar
Keyword(s):  
Bacillus Subtilis ◽  
Metal Ions ◽  
Binding Modes

NMR and potentiometric studies of 1,4,7-triazacyclononane-N,N′,N″-tris(methylenephosphonate monoethylester) and its complexes with metal ions

1992 ◽  
Vol 195 (1) ◽  
pp. 89-93 ◽  
Author(s):  
Istvan Lazar ◽  
Ravichandran Ramasamy ◽  
Erno Brücher ◽  
Carlos F.G.C. Geraldes ◽  
A.Dean Sherry
Keyword(s):  
Metal Ions ◽  
Potentiometric Studies ◽  
Complexes With Metal Ions

Spectral and theoretical study of 2-methyl-3-{[(Z)-3-methyl-5-oxo-1-phenylpyrazol-4-ylidene)methyl]amino}quinazolin-4-one and its complexes with metal ions M(II)

2015 ◽  
Vol 85 (7) ◽  
pp. 1706-1712 ◽  
Author(s):  
L. D. Popov ◽  
S. A. Borodkin ◽  
Yu. P. Tupolova ◽  
M. E. Kletskii ◽  
O. N. Burov ◽  
...  
Keyword(s):  
Metal Ions ◽  
Theoretical Study ◽  
Complexes With Metal Ions

Synthesis of 3-butanoyl- and 3-benzoyl-4-hydroxy-3-pyrrolin-2-ones and their complexes with metal ions

1990 ◽  
Vol 39 (4) ◽  
pp. 307-316 ◽  
Author(s):  
Olga Markopoulou ◽  
John Markopoulos ◽  
David Nicholls
Keyword(s):  
Metal Ions ◽  
Complexes With Metal Ions
Sign in / Sign up

Export Citation Format

Share Document