Uzbek attempts to control exchange rates have created an even bigger set of barriers.
Because human mediated dispersal is a fundamental factor in this expansion, authorities should intensively control exchange of wood and wood products between infested and non-infested areas.
For example, Brazil, which in 2000 stopped all exports of biological samples, even to Brazilians working abroad, has convened a National Council of Genetic Resources charged with finding a way to resume controlled exchanges.
And it's nothing like the carefully controlled exchanges of sound bites and unquestioned assumptions that now pass for debate on our front pages and TV screens.
The nuclear pore complex (NPC) is a huge multiprotein complex, which controls exchanges of macromolecules (RNAs and proteins) between the nucleus and the cytosol in eukaryotes.
The blood brain barrier (BBB) plays a central role in controlling the exchange of oxygen and nutrients [ 8, 15].
Controlling currency exchange Private companies that survived the government seizures faced additional hurdles.
Clothing is a suitable means of controlling heat exchange with the environment.
The use of ECMO, by controlling gas exchange, allowed the performing of successful OLT.
