However, the identification of genes related to grain yield is still a great challenge because of complexity of this trait.
He said the NHS was facing "its greatest challenge" because it was currently undergoing a reorganisation.
This may be his greatest challenge, because of the president's thin skin.
Among gynecologic cancers, ovarian cancer provides the greatest challenge because 75%to80%0% of patients present with stage III/IV disease.
For some in the West, the greatest challenge — because it is the least visible — is to shake off, at last, the view that large and growing numbers of people represent power and prosperity.
Within that shift, however, is also the greatest challenge, because for every one person who has gained this awareness, there are dozens who still don't know.
"That is really the greatest challenge, because many scientists can come up with new materials for certain applications, … but if they don't know how these materials are going to be placed in the body and interact with the cells, interact with biological fluids and so on, they have no appreciation of the total problem," Peppas says.
Interventions aimed at changing culturally accepted traditions often present the greatest challenge because, unlike many structural interventions, they are not easily modified by increased funding.
However, the discovery and optimization of such functional materials are great challenges because they are still hampered by material inherencies and thermodynamic limits.
However, it still faces great challenges because significant energy penalties and high economic costs are required to maintain the additional operations of the air separation unit and CO2 compression and purification unit.
Predicting water table depth over the long-term in agricultural areas presents great challenges because these areas have complex and heterogeneous hydrogeological characteristics, boundary conditions, and human activities; also, nonlinear interactions occur among these factors.
