When khat leaves dry, the more potent chemical, cathinone, decomposes within 48 hours, leaving behind the milder chemical, cathine.

The only drawback has been fears about the environmental impact of blasting away layers of rock using pressurised water and potent chemicals — an argument that fuelled opposition to the pipeline.

Potent chemicals should only be used by doctors with vast experience and in a controlled way.

Coral, sponges, fish, and marine microorganisms have a wealth of biologically potent chemicals with interesting inflammatory, antiviral, and anticancer activity.

She owes her success to a potent mix of energy, superhuman willingness to trust her own gut instinct, a sprinkling of perfectionism and, inevitably, luck.

Scientists have discovered a potent mix of anti-oxidants that can delay the ageing process.

Add this potent mix of marine collagen, antioxidants and other green goodness to water or a smoothie for glowing skin, healthy hair and strong nails.

Combine those two elements - the passion and the professionalism - and you've a potent mix.

Slather the mixture over your rabbit pieces and marinate for 1 hour or longer - leave overnight for a more potent mix.

He goes about his business with impunity, afforded by a potent mixture of money, ruthlessness and trickery.

This eclectic seven-member group create a big, energy-laden sound with their potent mixture of grime and rock, on this chart-friendly track.

But he tells his story with a potent mixture of conviction and deep knowledge.

It's a desolate moment in which she looks piercingly young, lost and vulnerable, a potent reminder of the humanity behind the memes and the headlines.

It became a potent reminder of the relative power of man and nature.

The ditching of the penny would be a potent reminder of how inflation has eroded spending power.

A potent reminder of what can happen on the home front when a powerful nation decides to embark on a messy, vaguely conceived adventure in a faraway land.

Both are potent reminders of humanity’s reckless disregard for what we throw away.

The toppling of his giant statue in the city weeks later was a potent symbol of the liberation of his people.

It seemed a potent symbol for modern youth - wild, uncoordinated, scary but ever-so-slightly awe-inspiring.

And sometimes, it's a potent symbol of the undefeated human spirit.

Polar bears, of course, have become a potent symbol of the cost of climate change.

However, this potent symbol of hearth and home has been riddled with controversy of late.

These days diesel particles are another potent threat, but because they are far less visible than coal smoke they remain largely undetected and ignored.

Now yakuza gangsters face an unexpected and surprisingly potent threat: no one will print their name cards.

In recent seasons, the 29-year-old has become an increasingly potent threat with ball in hand.

It has been banned for decades, but remains a potent threat and the only viable alternative.

They could form a potent threat.

The internet has proved a potent tool for retro-food junkies.

Sinecures have historically provided a potent tool for governments or monarchs to distribute patronage, while recipients are able to store up titles and easy salaries.

Such approach makes the heterogeneous musical material to become part of the integral sound corpus and a potent tool of the musical dramaturgy.

Theatre was a potent tool in manipulating a population already accustomed to spectacle.

The combination and interactions of these actions make maggots an extremely potent tool in chronic wound care.