The genotoxic effects of mixture of aluminum, arsenic, cadmium, cobalt, and chromium on the gill tissue of adult zebrafish (, Hamilton 1822).

The aim of this study is to investigate the genotoxic effects of mixtures of five metals on zebrafish at two different concentrations; at the permissible maximum contamination levels in drinking water and irrigation waters. The drinking water limits are as follows: 300 µg/L for Aluminum (Al), 10 µg/L for Arsenic (As), 5 µg/L for Cadmium (Cd), 10 µg/L for Cobalt (Co), and 50 µg/L for Chromium (Cr). The irrigation water limits: 5000 µg/L for Al, 100 µg/L for As, 10 µg/L for Cd, 50 µg/L for Co, and 100 µg/L for Cr.

Effects of arsenate and arsenite on germination and some physiological attributes of barley Hordeum vulgare L.

Arsenic (As) is toxic to plants and animals. We tested the effects of arsenite and arsenate (0-16 mg/L) on seed germination, and on relative root and shoot length, α-amylase activity, reducing sugars and soluble total protein contents, and malondialdehyde content in barley seedlings. We also measured As accumulation in barley stems and roots.

Induction of micronuclei and nuclear abnormalities in erythrocytes of mosquito fish (Gambusia affinis) following exposure to the pyrethroid insecticide lambda-cyhalothrin.

In the present study the induction of micronuclei (MN) and nuclear abnormalities (NA) in erythrocytes of mosquitofish (Gambusia affinis) (Baird & Girard 1853) was studied. Fish were exposed to three different concentrations of lambda-cyhalothrin (LCT) (1×10(-4)μg/l, 2×10(-4)μg/l, 4×10(-4)μg/l) for periods of 6, 12, 24, and 48h. NA (notched, lobed, blebbed nuclei), MN, bi-nucleated cells, and the ratio of polychromatic erythrocytes (PCEs) to normochromatic erythrocytes (NCEs) were evaluated to assess genotoxicity and cytotoxicity.

Freshwater crayfish Astacus leptodactylus (Eschscholtz, 1823) accumulates and depurates copper.

Cu accumulation and depuration in various tissues of the crayfish Astacus leptodactylus was investigated. Adult specimens were exposed to 0.5, 2.

Isolation, identification and seasonal distribution of airborne and waterborne fungi in Terkos Lake (Istanbul-Turkey).

This paper focuses on isolation and identification of airborne and waterborne fungi from different parts of Terkos Lake located in Istanbul (Turkey). The quantitative and qualitative fungal composition of the air and water of the Lake was surveyed monthly for a year (August 2000-July 2001). Water samples were taken at five different stations at Terkos Lake.