Effects of treated municipal wastewater and sea water irrigation on soil and plant characteristics

The increasing need for water in the arid areas of the world has resulted in the emergence of wastewater application for agriculture and landscape. Using treated wastewater in agricultural irrigation can provide more adequate supply of high quality water for human consumption, but their heavy metal applications effect must be regulated to ensure no physiological problems for both the plant and its consumer. The objective of the present research was to study the effects of treated wastewater on soil chemical properties and plant growth characteristics as well as accumulation of heavy metals in plant tissues. This research was conducted at Qatar university greenhouse in the growing season of 2007. Treated wastewater was obtained from Abu Nakhala pond in Doha City, Qatar. The soil was a mixture of sand and clay with ratio of [1:1]. Two crops plants were used in this study; grain sorghum [Sorghum bicolor L.] and Sunflower [Helianthus annuus L]. Plants were irrigated with four different mixtures of wastewater and sea water [1:0, 1:1, 3:1, and 0:1] in addition to potable water as a control. The accumulation of salts and heavy metals in the soil as well as concentration of the nutrients and heavy metal accumulation in the plant tissues were determined at the end of the experiment. Cr, Mn and Zn showed significant differences between soil irrigated with portable tap water and other irrigation treatments. On the other hand, Al, Fe, Ni, Co, Cu, As, Cd and Pb did not show significant differences among the irrigation water treatments. Sorghum soils have significantly less concentration of Co, Cu and As compared to that of Sunflower soils. Sorghum was found to accumulate significantly higher concentration of Mn and Zn [72.47 and 92.00 mg/L, respectively] than that of Sunflower. On the other hand, Sunflower has significantly higher concentration of Cr compared to Sorghum

Diagnostic value of transvaginal color and pulsed doppler in pelvic congestion syndrome

Pelvic vasculature and homodynamics of the female pelvis were studied in twenty patients complaining of chronic pelvic pain of unknown etiology and 10 women, without gynecologic complaint, as control were evaluated using transuterine pelvic phIebogrophy and transvaginal color and pulsed Doppler. Blood flow velocity waveform of each of the ovarian arteries were recorded, and pulsatility index [PI] value was measured. The phlebogram was considered pathologic if either of the ovarian veins reached >/= 8 mm at lumbar 5. Ovarian vein dilation was found to be a predominant pathology in patients complaining of chronic pelvic pain without evident cause [75%]. We have found significant positive correlation between the ovarian artery PI value and the ipsilateral ovarian vein diameter, in both study and control cases [r = 0.75, P < 0.05]. Thus transvaginal color and pulsed Doppler can be used as an alternative to phlebography for studying perfusion characteristics of the female pelvis. It has the advantage of being safe, non-invasive, reproducible, and easily interpreted