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Propolis is a complex substance with many constituents.

It is the propolis (or rather, certain constituents in the propolis) that can cause contact dermatitis in people who become sensitized to it.

Stem cells can develop into any kind of human cell.

Stem cells have the potential to be used in new treatments for conditions such as Parkinson's disease and paralysis.

Prepare for exams season with our video and accompanying Power Point slides on planning and conducting exams, including invigilation and what to do if the unexpected happens.

Video ¦ Slides JCQ has set common regulations for schools and colleges that enter students for general qualifications.