This study investigated several knowledge gaps with respect to the diffusive gradients in thin films (DGT) technique for measurement of oxyanions (As(III), As(V), Se(IV), Se(VI), PO4(3-), and V(V)) using the ferrihydrite and Metsorb™ binding layers. Elution efficiencies for each binding layer were higher with 1:20 dilutions, as analytical interferences for ICP-MS were minimised. Diffusion coeff...

To assess bioavailability levels and indentify important speciation for trace metals (Ni, Cu, Zn, and Pb), the rivers affected by a waste water treatment plant (WWTP) was studied. Biologically available concentrations were measured by the diffusive gradients in thin films (DGT) method, and DGT results were compared with those predicted by WHAM 7.0. At most sites downstream of the WWTP, bioavail...

A Distributed Generation Tariff (DGT) program to replace Ontario’s existing Feed-in Tariff (FIT) would have several benefits. For example, a DGT would play a useful role in facilitating the development of a wide range of innovative, small-scale electricity generating projects to help meet the province’s growing electricity demand. As such, it would have a positive environmental impact, reducing...

Escherichia coli encodes an enzyme, deoxyguanosine triphosphate triphosphohydrolase (dGTPase, EC 3.1.5.1), that cleaves dGTP into deoxyguanosine and tripolyphosphate. An E. coli mutant, optA1, contains a 50-fold increased level of dGTPase and cannot support the growth of phage T7 defective in [corrected] gene 1.2, whose product is an inhibitor of dGTPase. The optA1 mutation maps to 3.6 min on t...

The diffusive gradient in thin films (DGT) technique is an in situ passive sampling method that is designed to accumulate labile metal species in environmental systems. DGTs were applied for the determination of time integrated concentrations of low level dissolved metals in waters in areas of ecological concern. The data revealed heavy metal contamination of waters and tracked the contaminatio...

Ethylene synthesis in vegetative tisues is thought to be controlled by indoleacetic acid (IAA). However, ethylene synthesis in the diageotropka (dgt) mutant of tomato (Ly mkoaesc MIlL) was much less sensitive to IAA than In the norml variety (VFNS). Yet, mehanial wounding stimuted ethyne production by the mutant. The dgt tomato provides an opportunity to study the regulation of stress ethylene ...

Commercially available Diphonix(®) resin (TrisKem International) was evaluated as a receiving phase for use with the diffusive gradients in thin-films (DGT) passive sampler for measuring uranium. This resin has a high partition coefficient for actinides and is used in the nuclear industry. Other resins used as receiving phases with DGT for measuring uranium have been prone to saturation and sig...

This work sets out to investigate biological responses of Eisenia fetida to Cd, based on the bioavailable rather than total concentration of Cd, in soils. E. fetida was cultured for 14d in three selected Chinese soils amended with 0.1-40mgkg-1 Cd. Potentially bioavailable concentrations of Cd were measured in soil solution, in extractions using CaCl2 and HAc solutions, and using the technique o...

Determining the potential bioavailability of heavy metals, evaluating according to adapted regulations is essential efficiently conserve our coastal and estuarine waters. In this study, it aimed determine industrial pollution various other sources that Black Sea Basin exposed by using DGT (Diffusive Gradients in Thin Films) method grab (manuel) sampling water sediment evaluate existing quality ...

Long-term laborious and thus costly monitoring of phosphorus (P) fractions is required in order to provide reasonable estimates of the levels of bioavailable phosphorus for eutrophication studies. A practical solution to this problem is the application of passive samplers, known as Diffusive Gradient in Thin films (DGTs), providing time-average concentrations. DGT, with the phosphate adsorbent ...