Isolation of Pseudomonas species from soil sample for production of Pyoverdine and evaluation of its potential as an antimicrobial agent

Pyoverdine, a fluorescent siderophore that have high- affinity for iron is produced by Pseudomonas putida and Pseudomonas aeruginosa that synthesizes it under iron-deficient growth conditions. Pseudomonas species are often encountered in diverse ecological habitats along side being censurable for nosocomial infections spread round the world. Due to these characteristics, there's a growing interest during this microbe for a spread of uses. One such is the production of Pyoverdine, it influences the uptake of iron, along with eliminating the limited iron availability condition. Pyoverdine is important for Pseudomonas putida and Pseudomonas aeruginosa to cause acute infections. Intense research and study led to the invention of Pyoverdines being a crucial source of chelating Iron. This study is predicated on Pyoverdine extracted from two different species of Pseudomonas which will act as an antimicrobial agent for various species including Escherichia coli and Staphylococcus aureus. The organism, i.e., Pseudomonas putida and Pseudomonas aeruginosa, were isolated from soil sample using medias like: Cetrimide media, King’s B media. It had been confirmed using primary biochemical tests, along side species level identification (MALDI - TOF). Isolation was followed by studying the antimicrobial activity of Pyoverdine on different organisms using antibiotics as standard for the same. Results for the tests were obtained, colonies were observed on specific media and zone of inhibition was observed on Muller Hinton plate. Comparative studies were carried out to find which organism used up Pyoverdine or Pyoverdine - Fe complex without using FeCl3 as sole standard source. Thus, these compounds can synergize with conventional antimicrobials, forming a simpler treatment with serving as a useful gizmo

Study of the Interaction of an Iron Phthalocyanine Complex over Surface Modified Carbon Nanotubes

Carbon nanotubes (CNT) were prepared by a modified chemical vapor deposition (CVD) method. The synthesized carbon materials were treated with acidic and basic solutions in order to introduce certain surface functional groups, mainly containing oxygen (OCNT) or amine (ACNT) species. These modified CNTs (OCNT and ACNT) as well as the originally prepared CNT were reacted with a non-ionic Fe complex, Iron (II) Phthalocyanine, and three composites were obtained. The amount of metal complex introduced in each case and the interaction between the complex and the CNT materials were studied with the aid of various characterization techniques such as TGA, XRD, and XPS. The results obtained in these experiments all indicated that the interaction between the complex and the CNT was greatly affected by the functionalization of the latter.

Preparation of EDTA modified cotton fiber iron complex and catalytic properties for aqueous Cr(VI) reduction and dye degradation

Cotton fabric was modified with Na2EDTA using a hydrothermal method to introduce surface hydroxyl groups, and subsequent coordination of Fe(III) ions to produce an Na2EDTA modified cotton-fiber-Fe complex (Fe-EDTA-Cotton). After characterization by SEM and FTIR, Fe-EDTA-Cotton was used as a heterogeneous photocatalyst to reduce Cr(VI) and degrade Reactive Red 195 oxidatively, to evaluate its catalytic activity. The results indicated that high Na2EDTA and/or NaH2PO4 concentrations, and/or high hydrothermal temperature increased the carboxyl group content (QCOOH) of the cotton fiber, high Fe content and elevated temperature could enhance coordination. Fe-EDTA-Cotton had a significant photocatalytic function in reducing Cr(VI). Increasing the QFe value of the complex or stronger irradiation favored photocatalytic reduction of Cr(VI) species. Increasing the system's pH did not help the reduction reaction. Fe-EDTA-Cotton could also remove Cr(VI) and Reactive Red 195 simultaneously from aqueous solution, and showed strong photocatalytic capacity. The reduction or oxidation reaction could be regulated by changing Na2S2O8 concentration in the reaction system, which might provide a new way to treat wastewater containing organic pigments and Cr(VI) species. Highlight Hydrothermal process enhanced EDTA modification of cotton fabric > EDTA modified cotton fiber Fe complex was prepared > Cr(VI) removal was improved by its synergistic effect > Fe complexes can remove Cr (VI) and organic dyes from aqueous solution in one bath > The work might provide a new way to purify the wastewater containing organic pigments and Cr (VI) species.

A diamagnetic iron complex and its twisted sister – Structural evidence on partial spin state change in a crystalline iron complex

We report here the syntheses of a diamagnetic Fe complex [Fe(HL)2] (1), prepared by reacting a redox non-innocent ligand precursor N,N’-bis(3,5-di-tert-butyl-2-hydroxy-phenyl)-1,2-phenylenediamine (H4L) with FeCl3, and its phenoxazine derivative [Fe(L’)2] (2),...