1 “.... This reprint presents recent research activities concerning the characterization of air pollution...”

2 Subjects: “...structural characterization...”

3 Subjects: “...biometric characterization...”

4 Subjects: “...characterization...”

5 “... and strategies for sustainable groundwater development and use; characterization of the physical framework...”

6 “..., the targeting of suitable bacterial infections, and the selection and characterization of safe and efficient...”

7 “... the whole field, from agents with cancer-preventive activity, to novel and previously characterized...”

8 “.../sub-systems characterized by time-dependent interactions among themselves. Some examples...”

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