The decline in amphibians across the globe has sparked a search for the causes, and recent evidence suggests a connection with pesticides. However, for most pesticides, tests on amphibians are rare and conducted only for short durations (1 to 4 days) and without natural stressors. Recent studies have discovered that the stress of predator cues in the water can make insecticides much more lethal...

Glyphosate resistant (GR) weeds have been the focus of much debate since the introduction of Roundup Ready crops in the mid 1990’s. Initially the questions focused on whether GR weeds would actually develop, but this quickly changed to how to prevent their selection following their rapid appearance after the introduction of Roundup Ready crops. Evaluating the relative effectiveness of different...

The gene transfer from glyphosate tolerant soybean to Bradyrhizobium japonicum was evaluated in a free-air lysimeter experiment under natural conditions and increasing selection pressure, to monitor for the probability of horizontal gene transfer (HGT). A large volume lysimeter study that offers conditions comparable to normal farming was conducted in 2004 and 2005 with Roundup Ready® (RR) soyb...

Journal Roundup: Recent Developments in Tumor Ablation June 08, 2005 | Tumor Ablation [1] Journal articles published since the beginning of this year look at new treatment modalities, provide more evidence of ablation’s efficacy, and identify potential complications. Imaging technologies and combination therapies are also covered. */ Journal articles published since the beginning of this year l...

Abstract Purpose Revegetation of riparian zones is important to improve their soil nitrogen (N) dynamics and preserve microbial compositions. However, the success revegetation projects currently depends on weed control reduce non-target vegetation competing over nutrients ensure target plant species growth survival. Different methods affect composition N cycling. long-term effects herbicides po...

The quality of diets in rodent feeding trials is crucial. We describe the contamination with environmental pollutants of 13 laboratory rodent diets from 5 continents. Measurements were performed using accredited methodologies. All diets were contaminated with pesticides (1-6 out of 262 measured), heavy metals (2-3 out of 4, mostly lead and cadmium), PCDD/Fs (1-13 out of 17) and PCBs (5-15 out o...

The ~umose of the four ex~eriments re~orted here was to Preliminary results of four experiments designed to determine the competitive effects of Cyperus rotundus L. on sugarcane and to investigate methods of controlling this weed, are reported. A trial in which a plant crop of varieties N13 and N8 was grown under rainfed conditions showed that competition from C. rotundus caused decreases in yi...

This work aimed to evaluate Roundup effects on biochemical biomarkers of the neotropical fish Prochilodus lineatus. Fish were acutely exposed (6, 24 and 96 h) to 10 mg L(-1) of Roundup (RD) or only water (control) and samples of liver, for antioxidants analysis, and brain and muscle, for acetylcholinesterase (AChE) determination, were collected. Fish exposed to RD for 24h showed reduction on su...

A comparative cross platform evaluation of real-time polymerase chain reaction detection of DNA sequences present in Roundup Ready soya was undertaken using the ABI 7700 and Roche Lightcycler detection systems in combination with 3 different detection chemistries: TaqMan, Scorpion primers, and SYBR Green I fluorescent dye. Various copy numbers of a plasmid containing the soya lectin sequence we...

A linear integer minimization problem (IP) has the modiied integer roundup property (MIRUP) if the optimal value of any instance of IP is not greater than the optimal value of the corresponding LP relaxation problem rounded up plus one. The aim of this paper is to investigate numerically whether the MIRUP holds for the one-dimensional cutting stock problem. The computational experiments carried...