Some air stable electrolytic and non-electrolytic mixed ligand complexes of Mn(ll) ion with isonicotinic acid hydrazide have been synthesized and characterized by various physico chemical data based on micro analytical analysis, magnetic measurement, conductivity measurement, near and far infrared and electronic spectrophotometric studies. Various vibrational and spectral bands of ligand and complexes were studied and compared. The mode of shifting were used to diagnose the coordinating behaviour of donor element of ligand with Mn (ll) ions. All complexes were screened against Aspergillus flavus and classified as a mixed fungicide. Tentative octahedral geometry has been assigned for all Mn (ll)complexes.

Activated wood charcoal (Carbonized) acts as an excellent adsorbent and it finds wide applications. The present study was carried on four different activated wood charcoals Salix (Sac), Pinus (Pac), Anacardium occidentale (AOac) and Calophyllum inophyllum (CIac) found in Karwar district, Karnataka, India. The activated charcoal was prepared by carbonizing in a muffle-furnace at 800 0 C and the yield of carbonized carbon was about 50%. SEM morphology and EDX spectrum indicates the homogeneity and purity of the activated wood charcoals containing 65-86% carbon to that of commercial charcoal (89% C) and hydrogen is absent. Langmuir and Freundlich adsorption isotherms are well-correlated and verified. The regressive coefficient (R2 ) of isotherms recorded a higher value above 0.92 which proves the homogeneous and even adsorption phenomenon by the activated wood charcoals. Sac and AOac recorded highest percentage of removal of acetic acid of about 40-60% and 20-26% with Cac (20-25%) where Pac and CIac recorded 17-23% which is relatively near to the commercially activated charcoal(Cac). On comparison of relative percentage of removal of acetic by activated wood charcoals with commercial charcoal, the activated wood charcoals serve as an efficient adsorbent for acetic acid. The cost and availability of the wood is cheaper.