In fact, the nanotubes embedded in polymer matrix that can be readily characterized by Raman spectroscopy are non-luminescent, while those that are difficult for Raman are strongly luminescent.
Laboratory testing provides a cost-effective means of evaluating cookstoves while controlling variables that are difficult or impossible to control in the field.
As Frey points out, there are non-verbal cues and mannerisms therapists rely on while assessing patients that are difficult to pick up on through video chats and impossible to see in text-only interactions.
My first husband died of a heart attack and while that was difficult and sad, I went on to marry again and lead an incredibly happy life.
My own parents divorced while I was in college, and while that was difficult, they both led amazing lives and taught me the values of loyalty and of providing for one's family.
"Hotel arrangements were monitored wherever we went, there were daily medical checks for my players and, while that is not overly difficult, it can impact on players' mental state".
While I recognize that change is difficult, I believe that these changes will allow us to control the costs of publishing EHP while retaining its position as a scientific communications leader.
Fehn was born in Kongsberg, Norway, and spent his life "trying to run away from the Nordic tradition", while admitting that "it is difficult to run away from yourself".
While that statistic is difficult to verify, the book is indeed ubiquitous in Seoul.
The experiments indicate that while it is difficult to construct models using only historical data that consistently perform well, there are models that show good performance under certain pre-defined conditions, and that many of these models have an interesting property.
