Use of Aspergillus wentii for biosorption of methylene blue from aqueous solution

In this study, Aspergillus wentii was used as a biosorbent for the adsorption of methylene blue from aqueous solution. The effects of contact time, initial dye concentration, solution pH and temperature on biosorption were investigated. The contact time required (that is, the equilibrium time) for maximum dye biosorption was found to be 120 min. The amount of the dye biosorbed increased with increasing initial dye concentrations and solution pH, while it was decreasing with an increase in temperature. Percent biosorption was changed between 14.86 and 85.04 under all conditions studied. Desorption studies were performed by changing of the value pH among 3 - 10. Desorption was considerably affected by lower pH. The maximum percentage of desorption was found to be 29.51 at pH 3. Biosorption isotherm from equilibrium values followed Freundlich model

Melitopalynological and antimicrobial properties of honeys from elaziğ(e Turkey)

In this study, the pollen analyses and antimicrobial effect were conducted in honey samples, which were collected from seven localities where apiculture has intensively been practiced. Upon pollen analyses of 16 different plants have been determined. The plants contributing nectar to honey samples in Elazig were found as follows; Fabaceae: Astragalus, Trifolium, Vicia, Onobrychis; Asteraceae: Centaurea triumfettii, Carduus, Xeranthemum, Helianthus annuus; Lamiaceae: Salvia, Mentha;Rosaceae: Rubus, Prunus;Vitaceae: Vitaceae: Vitis;Apiaceae: Daucus; Zygophyllaceae: Peganum harmala; Ranunculaceae: Ranunculus. The honey sapmles have inhibited the growth of bacteria used in our work at varying degrees. None of the samples had any antifungal effect against Candida albicans FMC-17 and Saccharomycescerevisiae UAG-10

Synthesis, characterization, and antimicrobial activities of Cu(I), Ag(I), Au(I), and Co(II) complexes with [CH3N(CH2PPh 2)2]

Transition metal complexes of ditertiary aminomethylphosphine ligand, (Ph2PCH2)NCH3 [N, N-bis (diphenylphospinomethyl)aminomethane], dppam, with metal ions which are Ag(I), Au(I), Cu(I), and Co(II) have been synthesized under nitrogen atmosphere by the Schlenk method. [Ag(dppam)2]NO3 (1), [Au(dppam) 2]Cl (2), and [Cu(dppam)2]Cl (3) complexes have been isolated as colorless solids, whereas [CoCl2 (dppam)J (4) complex as a blue solid. All complexes have been characterized by atomic absorption, FT-IR, NMR (1H, 13C, 31P) spectroscopic, thermogravimetric/differantial thermal analysis (TG/DTA), and elemental analysis techniques. Antimicrobial activity of 1, 2, 3, and 4 were studied in vitro on 13 bacteria and 4 yeasts. The cobalt(II) phosphine complex has shown the best antimicrobial activity in comparison with the other metal complexes. © 2005 Wiley Periodicals, Inc

Two Cu(II) complexes from an N-alkylated benzimidazole: Synthesis, structural characterization, and biological properties

Two mononuclear copper(II) complexes, [Cu(L)Cl2](CH 3OH) 2 and [Cu(L)(NO3)2], were prepared and characterized by spectroscopic and analytic methods, where L is 2,6-bis(1-butyl-1H-benzo[d] imidazol-2-yl)pyridine. Molecular structures of the complexes were determined by X-ray diffraction. The X-ray data revealed that the complexes are mononuclear and coordination geometry around Cu(II) is distorted square pyramidal. The complexes were screened for their in vitro antibacterial and antifungal activities. The complexes show moderate antifungal activities against Saccharomyces cerevisiae, Candida utilis, and Candida albicans. Moreover, the complexes inhibit the development of Escherichia coli and Klebsiella pneumoniae. © 2014 © 2014 Taylor & Francis

Synthesis, characterization, and biological properties of Ni(II), Co(II), and Cu(II) complexes of Schiff bases derived from 4-aminobenzylamine

New Schiff bases, N,N'-bis(salicylidene)-4-aminobenzylamine (H2L1), N,N'-bis(3-methoxysali- cylidene)-4-aminobenzylamine (H2L2), and N,N'-bis(4-hydroxysalicylidene)-4-aminobenzylamine (H2L3), with their nickel(II), cobalt(II), and copper(II) complexes have been synthesized and characterized by elemental analyses, electronic absorption, FT-IR, magnetic susceptibility, and conductance measurements. For the ligands, 1H and 13C NMR and mass spectra were obtained. The tetradentate ligands coordinate to the metal ions through the phenolic oxygen and azomethine nitrogens. The keto-enol tautomeric forms of the Schiff bases H2L1, H2L2, and H2L3 have been investigated in polar and apolar solvents. All compounds were non-electrolytes in DMSO (~10-3 M) according to the conductance measurements. Antimicrobial activities of the Schiff bases and their complexes have been tested against Acinobacter baumannii, Pseudomonas aeruginosa, Micrococcus luteus, Bacillus megaterium, Corynebacterium xerosis, Staphylococcus aureus, Escherichia coli, Candida albicans, Rhodotorula rubra, and Kluyveromyces marxianus by the disc diffusion method; biological activity increases on complexation. © 2009 Taylor & Francis.Institute for Research in Fundamental Sciences: FEF2006BAP-15The authors are grateful to the Science Research Fund of the C¸ ukurova University in Turkey for supporting this work (Project number: FEF2006BAP-15) and to the Department of Chemistry for allowing using the laboratory facilities

Antimicrobial and antioxidant properties of Lamium galactophyllum boiss & reuter, L. macrodon boiss & huet and L. amplexicaule from Turkish flora

Some Lamium species have been used in folk medicine worldwide in the treatment of several desorders. This work aimed to screen the possible antimicrobial and antioxidant properties as well as total phenolic, resveratrol and flavonoid contents of extracts of three different Lamium species. According to analysis results the highest total phenolic concent was determined at Lamium galactophyllum (112.87 mg GAE/g extre). Quercetin and katesin were the major flavonoid contents for Lamium galactophyllum (respectively 296.7 and 323.35 ?g/ mL), Lamium macrodon (respectively 445.75 and 338.6 ?g/mL) and Lamium amplexicaule (respectively 101.6 and 330.9 ?g/mL). ABTS free radical scavenginig activity of plant extracts was higher than DPPH free radical scavenginig activity, but all plant extracts had free radical scavenging activity against DPPH and ABTS. Lamium galactophllum and Lamium macrodon exhibited more effective antimicrobial activity than Lamium amplexicaule. These results suggested that Lamium species used in this work had antimicrobial and antioxidant properties

Synthesis of allyl-cyclopropyl alcohols and allyl-1,5-hexadien -3- ols and investigation of their antibacterial and antifungal activities

629-633Two different methods have been used to obtain allyl-cyclopropyl alcohols and allyl-1,5-hexadien -3-ols, starting with various allyl substituted chloromethyloxiranes. While allyl substitued 1,5 - hexad ien - 3 - ols are formed in  reactions occurring with Mg in THF, the unsaturated cyclic alcohols are also formed. However, the reaction carried out with Na in CH3OH gives only 1,5 - dien - 3 - ols. Antimicrobial activity of the synthesised compounds has been tested against 16 microorganisms. The compounds have also been screened for their antibacterial and antifungal activities against bacteria, Yeasts and moulds.</span

Antimicrobial activity of the essential oils of rosin from cones of Abies cilicica subsp. cilicica

Essential oil from the rosin of cones of Abies cilicica (Ant. Et Kotschy.) subsp. cilicia Carr. grown in Turkey was obtained by the hydro-distillation method and the antimicrobial activities of the oil were evaluated. The antimicrobial results showed that the microbial activities of the oil were considerablydependent upon concentration and its bioactive compounds. The oil inhibited  the growth of all the bacteria and yeasts except for Escherichia coli at an oil concentration of 4 ìI/disc. Saccromyces cerevisiae, Klebsiella pneumoniae and Mycobacterium smegmatis were the most sensitive microorganisms to the essential oil due to their low MIC values of 0.5 ìg/ml. The results indicated that limonene was the most effective constituent on the microbial activities, followed by -pinene, myrcene, and b-pinene, the most effective antifungal activities were also determined for myrcene