The phrase 'deficient to' is correct and usable in written English.
It is used to express a lack of ability or a deficiency in something. For example: He was deficient to answer the question correctly due to his lack of knowledge.
On April 22, however, Ambach issued a ruling, which held that Wagner's credentials in education were too deficient to permit a waiver.
"And that's not saying they were deficient to begin with; Tom just strives for perfection.
It was one of those Park Avenue clashes that occasionally burst into headlines -- the kind in which one side believes it has been unjustly deemed too déclassé or otherwise deficient to merit entry to the famously prosperous precinct.
But this month, Beijing reported that Uyghur Muslim "terrorists" in Xinjiang had tried to blow up a plane while, in Tibet, Beijing says the past week's events have all been the result of a plot by the Dalai Lama - which indicates that its intelligence and suppression of "splittists" has been deficient, to say the least.
From that, we can extrapolate that many adolescent girls are also iron deficient to the point of being anaemic; more so than adolescent boys, because of monthly blood loss due to menstruation.
admissions test, like Rector's portrayal of immigrants as merely a costly encumbrance, gives comfort to those who would treat immigrants as an inferior species — not just freeloaders, but mentally deficient to boot.
Consistently, reduced SIRT1 expression resulted in increased HSF1 acetylation in B12-deficient TO cells.
This in turn triggers the integrated stress response epitomized by the phosphorylation of eIF2 α in the B12-deficient TO cells.
Se-deficient treatment groups were included in these microarray studies in order to assess Se status across the full range from Se-deficient to toxic Se status, to further characterize the effect of Se deficiency on the transcriptome, and to be able to distinguish the effects of Se deficiency from Se excess.
Look out through the visor of your spacesuit - necessary because Pluto's thin atmosphere is far too oxygen-deficient to breath - and enjoy the view".
Even some of the people most thirsty for transforming Mubarak's stagnant nation from a democracy-deficient to a democracy-rich society have, in despair, been yearning for the old stability.
