Sentence examples for substances present in from inspiring English sources

The substances present in the water include strontium-90, which has a half-life of almost 29 years.

"Even if e-cigarettes contained similar, or higher, levels of formaldehyde, they do not contain the majority of other toxic and carcinogenic substances present in cigarette smoke.

For example, the nonvolatile substances present in resins produced by trees of the pine family contain diterpene carboxylic acids belonging to three types: abietic, palustric, and elliotinoic.

Chloroform is formed by the reaction of chlorine with organic substances present in water and thus can occur in drinking water that has been chlorinated.

Chemists refer to published libraries of chemical shifts both to identify the substances present in samples of unknown composition and to infer the structures of newly synthesized molecules.

Endotoxins are pro-inflammatory substances present in the environment.

No one of the substances present in both products showed antifeedant activity on H. grandella larvae.

Moreover, crosslinking agents can give unwanted reactions with the bioactive substances present in the hydrogel matrix.

"Some of the substances present in smoke can irritate the lining of the air passages, the skin and eyes".

Hydrocarbon Basics Crude oil and natural gas are naturally occurring substances present in rock amid the earth's crust.

Until 2014, the WG analyzed the purity and composition of related substances present in 134 products (14 APIs) (Table 4).