Phytoremediation offers an ecologically and economically attractive remediation technique for soils contaminated with polycyclic aromatic hydrocarbons (PAHs). In addition to the choice of plant species, agronomic practices may affect the efficiency of PAH phytoremediation. Inorganic nutrient amendments may stimulate plant and microbial growth, and clipping aboveground biomass might stimulate ro...

Forecasting the effects of climate change on nitrogen (N) cycling in pastures requires an understanding of changes in tissue N. We examined the effects of elevated atmospheric CO2 concentration, atmospheric warming and simulated grazing (clipping frequency) on aboveground and belowground tissue N concentrations and C : N ratios of a C3 pasture grass. Phalaris aquatica L. cv. 'Holdfast' was grow...

BACKGROUND To compare the effects of endovascular coiling and neurosurgical clipping in patients with unruptured intracranial aneurysm. METHODS Sixteen electronic databases were searched for articles published between 1950 and July 2010 to compare clinical outcomes of clipping and coiling. Researchers reviewed all searched articles and extracted data independently. The quality of studies and ...

The dynamics of belowground net primary productivity (BNPP) is of fundamental importance in understanding carbon (C) allocation and storage in grasslands. However, our knowledge of the interannual variability in response of BNPP to ongoing global warming is limited. In this study, we explored temporal responses of BNPP and net primary productivity (NPP) partitioning to warming and clipping in a...

Understanding how soil respiration (Rs) and its source components respond to climate warming is crucial to improve model prediction of climate-carbon (C) feedback. We conducted a manipulation experiment by warming and clipping in a prairie dominated by invasive winter annual Bromus japonicas in Southern Great Plains, USA. Infrared radiators were used to simulate climate warming by 3 °C and clip...

We analyze 20 cases of ruptured vertebral artery dissecting aneurysms and discuss the best choices for the surgical procedure. The preoperative Hunt and Kosnik grade was I in nine cases, Ia in four cases, II in three cases, III in three cases, and IV in one case. Rebleeding occurred in six cases, in four cases within 24 hours after the initial bleeding, and in every case within 6 days. In two c...

INTRODUCTION The results of the International Subarachnoid Aneurysm Trial (ISAT) in 2002 have significantly influenced the management of ruptured intracranial aneurysms. There is now an established shift worldwide toward endovascular coiling as the initial treatment of choice. We assessed the outcomes of patients admitted to our institution for aneurysmal subarachnoid haemorrhage (SAH), compari...

This paper explores low complexity clipping of an Orthogonal Frequency Division Multiplexing (OFDM) transmit signal for critically sampled or oversampled complex data as a solution for the Peak to Average Power Reduction (PAPR) problem. Four existing clipping algorithms are compared to two new low complexity algorithms in an OFDM environment. Their performance is examined through mathematical a...

PURPOSE To evaluate the efficacy and stability of the wrap-clipping methods as a reconstructive strategy in the treatment of unclippable cerebral aneurysms. MATERIALS AND METHODS Twenty four patients who had undergone wrap-clipping microsurgery were retrospectively reviewed. Type and morphology of the treated aneurysm, utilized technique for wrap-clip procedure, and clinical outcome with angi...