Sentence examples for has still been difficult from inspiring English sources

Although various precursors have been tried in the attempt to obtain a well-developed HA, the Ca(NO3 2 and [P OC2H5 3] (TEP) combination has shown the most promising results, but until now it has still been difficult to obtain phase-pure HA.

However, it has still been difficult to apply this method to situations that do not involve pulsed organs, such as venous blood, capillaries, or chemicals distributed in an organ's cells.

He should have played 7... cd4, though his position would have still been difficult after 8 a3 dcb2 10Bb2cBb210 Bb2 Ne8 11 Bb2 f5 12 ef6 Nf6 13 Ng5 h6 14 Nh7 Nh7 15 Bb2 Kh8.

Populations with this type of demographic history have been useful for identifying rare recessive alleles, but common variants with small effects have still been difficult to find.

One reason for problems with this domain is that the questions in this domain might have still been difficult for respondents to understand.

And none of this gets away from the fact it has still been incredibly difficult.

But the relationship has still been a difficult one, with front line workers sharing stories of people being chased from parks and over-ticketed by police in a practice called "red-zoning". On top of that, the urban Aboriginal population in Montreal is both growing and facing rising rates of incarceration.

Since the ability in analyzing proliferation of viable CTCs has still been lacking, it is difficult to assess CTC information which is the representative of cellular information available in primary tumor.

"Maybe if we'd have scored that goal just before half time it would have still been very difficult but we could have maybe changed the game.

Thus, our aMCI participants may have still been able to handle the difficult PM tasks (i.e. activity-based PM) given their relatively mild impairment such that they did not exhibit greater deficits in those tasks.

It did rain this morning in New Orleans, so the oil congealed faster than it would have, but cleanup will still be difficult.