Spectroscopic characterization of oxime ligands and their complexes

New imine-oxime ligands H3L1-H3L3 have been obtained from reactions of the Schiff base ligands H2B1-H2B3 with monochloroglyoxime. Mononuclear copper(II), cobalt(II), nickel(II), vanadyl(IV) and zinc(II) complexes of the imine-oxime ligands H3L1-H3L3 have been prepared and characterized by elemental analyses, infrared and electronic spectra, magnetic moment and molar conductance data. The molar conductance data show that the complexes are non-electrolytes. When the imine-oxime ligands react with the metal salts in a 2:1 ratio, they behave as dibasic bidentate ligands towards one metal ion. The nickel(II) and zinc(II) complexes are diamagnetic. The 1H(13C)-nmr spectra of all ligands and nickel(II) and zinc(II) complexes of the ligands H3L1-H3L3 have been recorded. Mass spectra of the imine-oxime ligands and their nickel(II) and zinc(II) complexes were recorded. Some of the ligands and metal complexes have antibacterial activity

Chemical composition, antibacterial and insecticidal activities of the essential oil from the Pistacia terebinthus L. Spp. palaestina (Boiss.) (Anacardiaceae)

Essential oil (EO) was hydrodistillated using a Clevenger-type apparatus and chemically determined using gas chromatography (GC) and GC/mass spectrometry. The analysis of the EO from the leaves of the Pistacia terebinthus has indicated that ?-pinene (19.97%), sabinene (15.43%), ß-pinene (8.57%) and terpinen-4-ol (9.65%) are the major compounds of the oil in concern. In the antibacterial disc diffusion assay, EO revealed a broad spectrum activity on the growth of both gram-positive and gram-negative bacteria when compared with the standard antibiotics. Likewise, in the insecticidal assay, significant activity was observed on two important pest insects, Acanthoscelides obtectus and Tribolium castaneum. A 100% mortality was found at 160µL/L air dose for T.castaneum at 48-h and A.obtectus at 72-h exposure periods, respectively. © 2012 Wiley Periodicals, Inc

Presence of Campylobacter (C-jejuni) in recreational, lake and stream water and fresh fish in Turkey

WOS: 000232142700003The occurence of Campylobacter (C.) jejuni was studied in recreational lake and stream water and fresh fish during the months of April to June 2004 in the Kars district of Turkey. In total, 54 water samples were analyzed, 21 of which were from lake water (Cildir lake) and 21 were from stream water (Kars stream). Twelve samples were from untreated drinking water tabs. A total of 75 fresh fish (Capoeta capoeta capoeta, Capoeta trutta, Alburnoides bipunctatus, Leuciscus cephalus) samples that were caught from the same lake or stream were also analyzed. C. jejuni was detected by culturing in one sample out of 21 water samples from Cildir lake, at the level of 4.76 % with the value of 0.36 MPN/ml. Out of 21 water samples from Kars stream, 3 (14.28 %) were positive for C. jejuni. Values varied from <0.30 MPN/ml to 0.36 MPN/ml. No C. jejuni was detected in 12 unchlorinated drinking water samples. C. jejuni was isolated from the internal organs of 2.66 % (2 samples) of the fish examined. This is the first study in the region indicating water sources as a risk factor. In this case, even we could not isolate C. jejuni from untreated drinking water, C. jejuni was isolated from lake and stream water. Therefore, it was concluded that it is hazardous to use untreated surface water for drinking. Care should be taken regarding the use of these water sources even for only domestic purposes because there may be a threat to the health and well-being of users. Furthermore, contamination of agricultural products via irrigation has to be prevented

Chemical Characterization, Phytotoxic, Antimicrobial and Insecticidal Activities of Vitex agnus-castus’ Essential Oil from East Mediterranean Region

Essential oil of Vitex agnus-castus’ leaves was analysed GC and GC-MS. The oil was predominantly rich in 1,8-cineole (24.38 %), sabinene (22.77 %), trans-ß-farnesene (8.50 %), ?-pinene (7.14 %), ß-caryophyllene (6.49 %) and 1-terpinen-4-ol (5.23 %). In the phytotoxicity assay, the highest concentration of the oil (40 µL) completely inhibited the germinations of Lactuca sativa and Lepidium sativum. In the antimicrobial assays, essential oil was more active on yeast species and gram positive bacteria. The results of the insecticidal assays were also significant as the mortalities were 70 % and 96.67 % on Acanthoscelides obtectus and Tribolium castaneum at 34 µL L-1 and 136 µL L-1 oil (24 h), respectively. Essential oil of V. agnus-castus could be suggested as a potential source of bioagents for prokaryotic and eukaryotic organisms in concern. © 2015, Har Krishan Bhalla & Sons