Synthesis, Spectral and Antimicrobial Studies of Lanthanide (III) Chloride Complexes with the Schiff’s Base Derived from 2-Benzimidazolyl Mercaptoaceto Hydrazide and 2-Acetyl Pyridine

AbstractFew lanthanide (III) chloride complexes with Schiff’s base obtained by the condensation of 2-benzimidazolyl mercaptoaceto hydrazide and 2-acetyl pyridine have been prepared and characterized on the basis of elemental analysis, molar conductance, magnetic, electronic, infrared and 1H NMR spectral studies, IR and 1H NMR spectra indicates coordination through azomethine nitrogen, pyridine ring nitrogen and the carbonyl oxygen of the hydrazone moiety. A coordination number eight is suggested for these complexes.  The ligand and complexes were screened for their antimicrobial activity.Keywords: Schiffs base; Lanthanide (III) chloride complexes; Antimicrobial activit

Synthesis, Spectral and Antimicrobial Studies of Lanthanide (III) Nitrate Complexes with Terdentate ONO Donor Hydrazones

Few lanthanide (III) nitrate complexes with hydrazones obtained by the condensation of 3-[m/p (hydrazino carbonyl)] phenyl sydnone and hydroxy aryl aldehyde or ketones have been synthesized and characterized by elemental analysis, molar conductance measurements, magnetic moments, Infrared, electronic and 1HNMR spectral studies. The spectral studies show that the hydrazones reacts in enol form and as dibasic terdentate ONO donor nature. From the results the coordination number eight for lanthanide ion in the complexes is proposed. The thermal behaviour, stability ranges, percentage of weight loss, percentage of residue obtained after decomposition of Ln (III) nitrate complexes has been studied. Further more the antimicrobial activity of the ligand and its complexes as inhibiting agents has been screened in vitro against two kinds of pathogenic bacteria Salmonella paratyphi, Bacillus cirroflagellosus and pathogenic fungi Aspergillus niger, Candida albicans

REVIEW PAPER ON WORM GEAR ANAYLASIS

The worm & worm wheel is used in gear box of Winch machine for lifting sand bucket. During working worm wheel fails due to load coming on the teeth. The failure is due to stress concentration. The crack appears at central thickness of tooth. Hence the tooth breaks at the central thickness. The failure of wheel occurs within period of about 20 days. So the company has to replace the worm wheel which is not cost effective. The stress calculation of worm wheel at tooth thickness is a three dimensional problem. This paper represents the review of analysis of stress pattern by using 3D Photoelasticity techniques & FEA techniqu

Effect of weather parameters on rice yellow stem borer Scirpophaga incertulas (walker) population dynamics under shallow low land ecology

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