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Substances in sentence

162 examples of Substances in a sentence

The lessons learned may help not only to reduce the risk of future accidents, but also to facilitate recovery in areas around the world that have been contaminated by radioactive or other toxic substances.
Another problem is that there are no restrictions on the sale of old equipment that runs only on the banned substances.
Using performance-enhancing substances can seem like an easy way to boost one’s chances of reaching – or remaining at – that top level.
Yet these substances remain the most commonly abused in elite sports.
And over the years, researchers have continually developed new, more accurate methods for detecting a wider variety of substances.
But just as the technology for detecting substances improves, new methods of artificial performance enhancement emerge.
Other potential detection methods, likely to be implemented in the near future, could identify traces of the viral vector or detect activating substances used to enhance activity of the newly introduced gene.
Initiatives like free universal pre-kindergarten, higher taxes on health-damaging substances, and broader vaccination coverage would probably do much more than precision medicine to enhance public health over the coming decades.
The report breaks down the issue in a compelling way: by countries (producers, transit states, consumers, or all of these); by substances (marijuana, cocaine, heroin, and synthetic drugs); by links among these illicit substances; and by the consequences of consumption, production, or trade of each drug for societies, institutions, and international relations.
Early chemists hypothesized that combustible matter contained a hidden element – phlogiston – that could explain why substances changed form when they burned.
Another serious problem is the use of ozone-depleting substances, such as halons and freons.
Following international agreements such as the Montreal Protocol on the Protection of the Ozone Layer, global emissions of ozone-depleting substances have otherwise been substantially reduced.
Furthermore, mobile-phone batteries contain toxic substances, including heavy metals like cobalt, lead, and zinc.
If the device is incinerated or left to degrade in a landfill, these substances can leak into soil and groundwater, seriously harming human health and the environment.
One model is the Montreal Protocol on Substances that Deplete the Ozone Layer, which has succeeded spectacularly in reducing levels of chlorofluorocarbons, highlighting the continued potential of inclusive multilateralism.
In some cases, deficient storage and refrigeration systems turn safe medicines into dangerous substances.
Moreover, the vast majority of the pesticidal substances found on produce occur “naturally” in people’s diets, through organic and conventional foods.
Other toxic substances in Moscow’s air are at nine times the normal level.
Countless food additives are either banned or permitted only in limited quantities, as are children’s toys painted with substances that could be harmful if ingested.
But Folkman persevered, and eventually he proved that such chemical substances do exist.
Today, four decades later, such substances have been used to treat more than 10 million people with neovascular diseases such as macular degeneration and many different forms of cancer.
I had a similar experience when I was working in his lab, trying to isolate the first inhibitors of blood-vessel growth (which were large-molecular-weight substances).
Given that tumors take several months to grow, biocompatible systems had to be developed that could release proteins and other large-molecular-weight substances slowly and continuously in the body – something that scientists were convinced was impossible.
Research indicates that black carbon (the soot from inefficient combustion in stoves, fires, engines, etc.) belongs to a class of substances that have an extremely high global warming potential.
These substances exacerbate climate change, but they linger in the air only for short periods and are easy to remove.
The past three US presidents, furthermore, have all admitted to consuming – to one extent or another – illegal psychoactive substances, while seven million Americans, according to the United Nations, are regular cocaine users.
In 1998, to celebrate the 10 th anniversary of the adoption of the third Convention on Narcotic and Psychotropic substances, the United Nations convened a special General Assembly session to discuss the issue of illicit drugs.
Moreover, new synthetic and chemical substances, which are more potent and often less expensive than the "classic" ones, are being invented.
In short, world leaders must take advantage of falling oil prices to move beyond indirect carbon pricing – achieved through the prices of carbon-emitting substances – to an explicit carbon tax that can help steer the world onto a more sustainable growth path.
The phase-out of ozone depleting substances through the Montreal Protocol, for instance, shows what can be done when the international community works together.
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