Sentence examples for groups of substance from inspiring English sources

Similarly, excluding item 6 led to difference in the reported scores between the two groups of substance users.

There were significantly more males amongst the groups of substance misusers (SIP and PS) than in the PNS group, but no significant differences with regards to age, number of children or years of education between groups.

It has introduced a forensic early warning system to pick up risky new substances on the market and temporary drug orders to ban whole groups of substances immediately for a 12-month period while experts investigate.

All these groups of substances have one thing in common they are all polymers (substances composed of large molecules formed from smaller ones), produced by applications of a rapidly growing branch of chemistry, polymer chemistry, established in the early 1930s.

Many groups of substances, including di 2-ethylhexyl phthalate (di 2-ethylhexyl phthalatelorophenol (PCP), copper, TBT anDEHPchlorvos.

In the following, two prominent groups of substances will be used as examples to answer these questions.

Multicomponent methods for simultaneous extraction of several groups of substances of different polarity are therefore always to be understood as a compromise as the extraction conditions cannot be optimal for all organic compounds.

Determination of oil and grease concentrations in effluent does not determine the presence of specific substances, but groups of substances that can be extracted from a sample using a particular effluent.

As regards the Environmental Quality Standards (EQS), 10 substances or groups of substances were found in surface waters to exhibit concentrations above the annual average value, while only the benzo(a pyrene⁎ concentration exceed the maximum allowable level.

Moreover, based on the identification of needs for specific emerging substances or groups of substances, NORMAN encourages Proficiency Testing (PT) providers and / or partners of the network to organise and conduct interlaboratory studies.

Realistic infochemical potential can be assumed for three groups of substances: Figure 1 Stepwise approach to identify suitable test substances for proof of concept regarding infochemical effects in surface waters.