Topic contaminants

News contaminants

• Chemistry professor links faeces and caffeine

  Researchers led by Prof. Sébastien Sauvé of the University of Montreal’s Department of Chemistry have discovered that traces of caffeine are a useful indicator of the contamination of our water by sewers. “E coli bacteria is commonly used to evaluate and regulate the levels of fecal pollution of our more

• Thermo Fisher Scientific Announces New Method for Low Level Detection of Volatile Nitrosamines in Tobacco

  Thermo Fisher Scientific Inc. announced a new comprehensive method that uses triple quadrupole GC-MS/MS to achieve lower levels of detection of volatile nitrosamines (VNA) in tobacco. The new method allows environmental laboratories, tobacco companies and government agencies to efficiently separate more

• Environmental contaminants in foodstuffs

  The final report of the research project "Foodborne exposure to environmental contaminants" (LExUKon) is now available. In this project scientists of the Federal Institute for Risk Assessment (BfR) have calculated, together with colleagues from the Research and Advisory Institute for Hazardous Subst more

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• Molecular Probes® NanoOrange® Assay Performed on BMG LABTECH FLUOstar OPTIMA Microplate Reader
  

  The field of proteomics has expanded dramatically in recent years with research on a whole host of organisms. Techniques such as two dimensional difference gel electrophoresis (2D DIGE) require the accurate quantitation of protein, as up to three labelled samples can be loaded on a single gel for comparison. Assay methods for determining protein quantitation include absorbance at 280 nm(1), the Bradford assay(2), Lowry assay(3), BCA method(4) and more sensitive assays such as Fluoroprofile® (Sigma-Aldrich) and NanoOrange® (Molecular Probes®)5(). more

• DNase I Recombinant, RNase-free
  

  Preparation of RNA, free from DNA, is a critical step before performing RT-PCR assays. Total RNA isolated from several sources using routine methodologies is frequently contaminated with DNA that can give rise to amplification products, which mimic the amplicons expected from RNA targets. DNase I recombinant, RNase-free safely and efficiently eliminates genomic DNA contaminations from RNA samples. more

• Particle shape - an important parameter in pharmaceutical manufacturing
  

  The advent of rapid and reliable measurement technologies, together with the FDA's PAT (Process Analytical Technologies) initiative, has increased the use of particle shape analysis within the pharmaceutical industry. Particle shape, like particle size which is routinely measured and controlled, can directly influence product performance and its measurement can lead to improved process and product understanding. Here we consider the importance of particle shape measurement for the pharmaceutical industry, with reference to the aims of the PAT initiative, and highlight the modern image analysis techniques available for sensitive size and shape characterization. more

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