Five methods for estimating maximum daily and annual nitrate (NO3) and suspended sediment loads using periodic sampling of varying intensities were compared to actual loads calculated from intensive stormflow and baseflow sampling from small, forested watersheds in north central West Virginia to determine if the less intensive sampling methods were accurate and could be utilized in TMDL develop...

We find that trade and domestic market size are robust determinants of economic growth over the 1960-1996 period when trade openness is measured as the US dollar value of imports and exports relative to GDP in PPP US$ (“real openness”). When trade openness is measured as the US dollar value of imports and exports relative to GDP in exchange rate US$ (“nominal openness”) however, trade and the s...

To investigate the antiarrthritic activity of petroleum-ether extract of Portulaca oleracea. The petroleum-ether extract of Portulaca oleracea was subjected to preliminary phytochemical screening. Acute toxicity studies were carried out in Male Wistar rats and anti-arthritic activity by Fruends adjuant arthritis model. Phytochemical evaluation revealed the presence of alkaloids, tannins, flavon...

OBJECTIVES The present study investigated the toxic properties of petroleum ether extract of Wattakaka (W.) volubilis in Wistar female rats. METHODS An in vitro brine shrimp lethality bioassay was studied in A. Salina nauplii, and the lethality concentrations were assessed for petroleum ether extract of W. volubilis. A water soluble portion of the test extract was used in different concentrat...

This paper analyses China’s ICT exports growth in its two major markets Japan and the US from 1992 to 2004. It focuses on ICT products classified in SITC 75, 76 and 77. The empirical results show that Chinese exports had maintained two-digit annual growth during the period. The growth was much higher than the corresponding growth of the overall markets. By 2004, Chinese ICT exports accounted fo...

The aim of the research was to compare the effects of various petroleum products, biodiesel, diesel oil, fuel oil and unleaded petrol on soil dehydrogenases, and to evaluate biostimulation with compost and urea in the restoration of homeostasis of the soil contaminated with these products. The obtained results allowed for defining the weight of dehydrogenases in monitoring of the environment su...

The most usual type of petroleum mulch, which has been successfully used to combat desertification in large areain Iran for more than thirty years, is produced by heavy residue petroleum cuts. The petroleum mulch consists of awide range of different heavy hydrocarbons such as Polycyclic Aromatic Hydrocarbons (PAHs). PAHs are present atlow level in petroleum mulch, where there is contact with wa...