1.   In theory, scientists could develop drugs that bind to the dopamine transporter, which would lock the door to cocaine.

2.   Scientists are developing new drugs to treat arthritis.

3.   This fact has emerged during a pilot test of a new computer program developed by scientists for the Department of Transport.

4.   Scientists are developing a treatment for the disease.

5.   Scientists are developing an alternative approach to treating the disease.

6.   However, computer scientists have developed programs which produce numbers that are apparently random.

7.   An Egyptian scientist has developed a gel based on petroleum waste which he claims can dramatically improve the productivity of sandy soil.

8.   Dutch scientists have developed catalytic converters which they claim are both cheaper and more environment-friendly than conventional ones.