In this study, eight different surface water resources located in five villages of Gölcük, Kocaeli, were tested between June 1999 and 2000 to determine the NO 3 -N, Cl and pH values. Temporal variation in these parameters reflects changes in precipitation. The test results showed that the NO 3 -N, Cl and pH levels varied between 0.65-0.11 mgL, 0.54-0.04 mgL and 8.33-5.15, respectively. Data sho...

L-Methionine gamma-lyase (MGL) catalyzes the pyridoxal 5'-phosphate (PLP) dependent alpha,gamma-elimination of L-methionine. We have determined two crystal structures of MGL from Pseudomonas putida using MAD (multiwavelength anomalous diffraction) and molecular replacement methods. The structures have been refined to an R-factor of 21.1% at 2.0 and 1.7 A resolution using synchrotron radiation d...

The second messenger hydrogen peroxide transduces changes in the cellular redox state by reversibly oxidizing protein cysteine residues to sulfenic acid. This signaling event regulates many cellular processes but has never been shown to occur in the brain. Here, we report that hydrogen peroxide heightens endocannabinoid signaling in brain neurons through sulfenylation of cysteines C201 and C208...

The present investigation was carried out to study the In vitro shoot multiplication and callogenesis in Gladiolus. For this purpose, cormel, meristem and leaf explants were chosen. Different concentrations of BAP i. e., 0.5, 1.0, 1.5, 2.0 or 2.5 mgL (2.22, 4.44, 6.66, 8.88 or 11.10 μM) were supplemented to MS medium. Both cormel and meristem explants showed maximum multiplication on MS medium ...

In Escherichia coli, several systems are known to transport glucose into the cytoplasm. The main glucose uptake system under batch conditions is the glucose phosphoenolpyruvate:carbohydrate phosphotransferase system (glucose PTS), but the mannose PTS and the galactose and maltose transporters also can translocate glucose. Mutant strains which lack the enzyme IIBC (EIIBC) protein of the glucose...

background: the hazardous nature of aflatoxins to human and animals necessitate the establishment of control measures. objectives: the effect of two medicinal plants, satureja khozistanica and satureja macrosiphon, was studied on inhibiting aspergillus flavus growth and reducing aflatoxin b1-content in the liquid medium. methods: essential oils were isolated by hydrodistillation method, using a...

BACKGROUND Ethanol exposure and withdrawal during central nervous system development can cause oxidative stress and produce severe and long-lasting behavioral and morphological alterations in which polyamines seem to play an important role. However, it is not known if early ethanol exposure causes long-lasting protein oxidative damage and if polyamines play a role in such a deleterious effect o...

Ethanol (C2H6O) sensitivity of zinc oxide (ZnO) thin film has been studied in present work. Semiconductor thin films of zinc oxide (ZnO) were deposited onto alkali-free glass substrates by the sol–gel method and dip-coating technique. The ZnO sol was synthesized by dissolving zinc acetate dehydrate in ethanol, and then adding Tetra ethanol-amine.  The as-coated films were preheated at 150 ºC fo...

Thirty four arsenic resistant bacterial strains were isolated from the soil samples of Khulna Shipyard. They by growing them on nutrient broth medium containing 5 mgl-1 arsenic. From them, five finally selected, and studied their morphological, biochemical ecological characters in details. identified as Bacillus lichenifomis, polymyxa, Listeria murrayi, Moraxella urethralis Planococcus citreus....

The purpose of our study was to analyze reports of the American Association of Poison Control Centers (AAPCC) of suspected overingestion of ethanol from mouthrinses by children younger than 6 years of age between 1989 and 1994. Annual incidence rates of reported ethanol exposures attributed to mouthrinses were calculated. Lethal and toxic amounts of several mouthrinses were calculated using pea...