Numerous studies have shown that its application in vivo is possible but the effectiveness of the methods remains limited in these cases. (ics-mci.fr)
However, achieving artificial photosynthesis in solution remains limited by the use of costly and toxic metal - based compounds to harvest light. (sciencedaily.com)
Thus far there remains limited clarity as to the nature and direction of the new government and indeed whether new leadership in fact signals a meaningful change of course. (africanlawbusiness.com)