Device for parallel and synchronous injection for sequential injection of different reagents

A microfluidic device comprising:

• plural micro-channels;
• an injecting device configured to alternately inject plural liquids into each of the plural micro-channels;
• and
• at least one controlling device positioned to form at least one zone in each of the plural micro-channels and configured to control a progression of one of the plural liquids flowing through the plural micro-channels by effecting at least one action on the at least one zone based on a physico-chemical property of the one of the plural liquids, the action not directly affecting another of the plural liquids.

A microfluidic device, comprising:

• plural micro-channels;
• means for injecting plural liquids including a first liquid and a second liquid alternately into each of the plural micro-channels, the first liquid being provided to form mobile reaction chambers and the second liquid being provided to form non-miscible segmenters in each of the plural micro-channels;
• and
• means for controlling a progression of one of the plural liquids in the plural micro-channels by forming at least one zone in each of the plural micro-channels to effect, when activated, at least one action on the at least one zone so as to delimit an injection volume of said one of the plural liquids in each of the plural micro-channels, the at least one action being based on a magnetic effect to a property of said one of the plural liquids, and not directly affecting another of the plural liquids.