So far, no research has been focused on the determination of organomercuries in sewage sludge. Here, an ultrasonic extraction method for the rapid determination of methylmercury (MeHg) and ethylmercury (EtHg) in sewage sludge after ultrasound-assisted extraction is proposed. Using TMA (tetramethylammonium hydroxide) as the extractant with 3.0 g copper powder, ultrasonic extraction for 30 min at...

During the Persian Gulf war in 1991 around eight million barrels of crude oil were spilled into water. This caused a large volume of contaminated water has to move to land in particular, Khuzestan's soil. A real danger of oil pollution would be an environmental calamity, and therefore, reclamation practice on the spoil soil area to expel the oil is essential. Bioremediation methods will be surv...

abstract to study the effects of sewage sludge on tomato seedling growth, a series of pot experiments, each pot containing 17 kg soil, were conducted in a randomized complete design with eight replications. treatments used were: 5 levels of sewage sludge (5, 10, 20, 30 and 40 tons/ha) and two control treatments (t1, without sewage sludge and t2, sewage sludge + complete fertilizers). analysis o...

Background:Magnesium has anti-nociceptive effects and potentiates opioid analgesia following its systemic and neuraxial administration. In our study, the effect of intravenous magnesium sulphate in pre-eclamptic patients on spinal anaesthesia produced by bupivacaine was investigated. Materials and Methods:Sixty pregnant (30 normal and 30 pre-eclamptic) patients were enrolled in this study in tw...

The study aimed to assess the most efficient solution of raw material management in selected biogas plants into concept circular economy and evaluate due quality quantity feed final product obtained, which is biogas, as well at closed circulation (circular economy). evaluated two agricultural on a real scale one sewage treatment plant (in scale) northeastern Poland. A year-long showed that tech...

We have compared the behaviour of normal and t6/t6 embryos in PCMF, a suboptimal 'delay' medium which arrests normal development. Morphologically, the two types of embryos are indistinguishable in this medium. Although beta-glucuronidase activity in embryos does not rise as quickly in delay medium as in cNCTC, a nutritive medium, the rate of increase is similar in t6/t6 and normal embryos. We c...

Sewage solids are usually characterized by non-specific parameters such as suspended solids. The suspended solids has been shown to be an inadequate index for advanced water treatment processes. In this study, the sewages solids particle size distribution was used to provide more detailed information on sewage characteristic. It is hoped that, by introducing particle size distribution, the mech...

Intramembrane charge movement (Q) and sodium current (INa) were monitored in isolated voltage-clamped frog nodes of Ranvier, ON charge movements (QON) for pulses from the holding potential (-100 mV) to potentials V less than or equal to 0 mV followed single exponential time courses, whereas two exponentials were found for pulses to V greater than or equal to 20 mV. The voltage dependence of bot...

Desain fall block yang berat akan menambah beban kerja crane saat operasi, selain itu juga diatas dek kapal sangat berpengaruh terhadap stabilitas kapal, oleh karena perlu dilakukan kajian untuk mengurangi blok sehingga kinerja lebih optimal mengangkat beban. Optimasi topologi telah sukses dalam beberapa dekade terakhir, metode analisis elemen hingga (FEA) dan studi eksperimental menyelidiki me...

Aiming at semi-decentralized suburban sewage resource recovery, pilot-scale Enhanced membrane coagulation reactor (E-MCR) was set up for the first time for preliminary demonstration of sewage pre-concentration. During around 2400h continuous operation with different working scenarios, a relative stable average permeability of 30-50 L/mh·bar was achieved through the combination of enhanced coagu...