Sentence examples for the serious obstacles from inspiring English sources

The surprise endorsement of Senator Barack Obama by a popular senator in a battleground state on Friday underlined the ferment in the Democratic nominating race and the serious obstacles facing Senator Hillary Rodham Clinton as she tries to rescue her candidacy.

Thus, new strategy is in needed to overcome the serious obstacles in cancer treatment.

Less targeted and limited solubility of hydrophobic-based drug are one of the serious obstacles in drug delivery system.

"It is also needed that, when a country achieves some progress in economic policies along the guidelines, the E.U. acknowledges it, in order to put a stop to the serious obstacle of spreads that have no reference to the economy's health".

One of the most serious obstacles is the silence and stigma surrounding the disease", said Dr Nafis Sadik, the UN Secretary-General's Special Envoy for AIDS in Asia.

These strategies have various limitations, the incompleteness of the records available and the lack of control on the environmental conditions being among the most serious obstacles to draw reliable conclusions.

Macri's unbridled optimism on Sunday — as he told his supporters that "Argentina is starting a wonderful new phase" — ignored the many serious obstacles he will face delivering the sweeping change he has promised.

Not all patients respond to HAART and the development of drug resistance remains one of the most serious obstacles to sustained suppression of HIV.

Researchers for Intel say they have discovered a new material that they believe will permit them to overcome one of the most serious obstacles facing chip makers as they struggle to shrink computer chips to ever smaller dimensions.

Despite of great progress in lithium-sulfur (Li-S) batteries, shuttle effect caused by long chain polysulfides, as one of the most serious obstacles, needs to be urgently solved for potentially commercial application of Li-S batteries.

The high percentage of farmers without any veterinary assistance (Additional file 1) is one of the most serious obstacles impeding successful control of CLA.