[Effect of napthalene on the DNA methylation patterns and level in rice (Oryza sativa L.)].

In this study,two elite rice inbred lines, Nipponbare and Mastumae were selected and irrigated with naphthalene solution with different concentrations. Epigenetic instabilities in the blade of the plants in tillering and heading stage were assessed by MSAP marks. The results showed that naphthalene exposure induced epigenetic variations in all the samples based on different levels and patterns of DNA methylation.

[Stress and biological response of naphthalene on the antioxidant defense system in visceral mass of zebrafish (Danio rerio)].

With the acute toxicity test, we obtained the median lethal concentration (LC50) of naphthalene to the zebrafish for 96 h, which was 11.8 mg x L(-1). Then we set up five treatments(0, 1/6 LC50, 1/4 LC50, 1/3 LC50 and 1/2 LC50) and exposed zebrafish to these treatments for 0.

Eco-physiological characteristics of alfalfa seedlings in response to various mixed salt-alkaline stresses.

Soil salinization and alkalization frequently co-occur in nature, but little is known about the mixed effects of salt-alkaline stresses on plants. An experiment with mixed salts (NaCl, Na(2)SO(4), NaHCO(3) and Na(2)CO(3)) and 30 salt-alkaline combinations (salinity 24-120 mmol/L and pH 7.03-10.

Diaqua-bis(9-oxo-4,5-diaza-fluoren-3-olato-κN,O)cadmium(II).

The title compound, [Cd(C(11)H(5)N(2)O(2))(2)(H(2)O)(2)], is a mononuclear complex consisting of a Cd(II) atom, two 3-hydr-oxy-4,5-diaza-fluoren-9-one ligands and two coordinated water mol-ecules. The Cd(II) atom, lying on a twofold axis, displays a distorted octa-hedral coordintion. Adjacent mol-ecules are linked by O-H⋯O hydrogen bonds and π-π inter-actions [centroid-centroid distance = 3.

[Comparative research on Cd removal from water by different kinds of seedlings].

Ecological effects of Cd removal from water and the changes of physiological and biochemical indexes of seedlings of maize, sunflower and castor-oil plant were investigated. The results showed that (1) with the trial time lasting, Cd content in solution decreased, and the processes of Cd removal by seedlings of each concentration were almost completed in 48 hours. The removal effects of sunflower and castor-oil plant were better than those of maize at 1 mg x L(-1) and 2 mg x L(-1) Cd, whereas the best removal effects at 5 mg x L(-1) and 10 mg x L(-) Cd were those of castor-oil plant, followed by maize and sunflower.

Effects of temperature and discharge parameters on ozone concentration of negative corona discharge.

The relationship of the ozone generation and the heating power, corona wire surface temperature, discharge electrode and netting electrode was studied during the negative corona discharge. The experimental results showed that the ozone concentration reduced with applied voltage decrease. With heating power increase, the ozone concentration of unit current decreased at exponential rate and it almost change no longer over 0.