The phrase "although not fully known" is correct and usable in written English.
It can be used to indicate that something is not completely understood or that there are gaps in knowledge about a subject.
Example: "The effects of climate change on marine life are concerning, although not fully known."
Alternatives: "even if not entirely understood" or "despite being somewhat unclear".
Although it is not fully known the impact of these initiatives on the skills of the students, it is clear, from the data, that there was no change in their geographical distribution.
Damage totals in the United States are not fully known, although media summaries of Nora included a loss to agriculture preliminarily estimated at several hundred million dollars, and at least one study places the figure at $150 200 million (1997 USD).
Among them, RIN [6], NOR [24], CNR [25] and HB-1 [30] seem to regulate ethylene-related genes although their hierarchical relationships are not fully known.
Although the exact reason is not fully known, it seems that bats are an ideal reservoir for a number of zoonotic viruses covering many different virus families.
This observation suggests a cascade mechanism for transmission of signals, the extent of which is not fully known although it converges in a predictable, relatively small number of reactions.
The mechanism by which TSA induces cell death is not fully known, although studies in tumor cell lines have suggested increase in the expression of proteins involved in the DNA damage pathway, including the activation of p53 which may influence cell survival [29], [30].
Although its physiological role is not fully known, COX2 may function significantly in the inhibition of apoptosis and immune surveillance, the promotion of angiogenesis, the elevation of cancer invasiveness and metastasis, and the modulation of cell differentiation [ 11].
While the effectiveness of modern therapy can definitely improve outcomes in RA, the explanation for a moderate disease course is not fully known although smoking is down and the microbiome may have shifted, gaining or losing some species members.
Therefore, it has been suggested that both conditions would be different manifestations of a common pathogenic phenomenon of airways, representing a continuum of the same illness, although the mechanisms involved are not fully known [ 9].
The mechanisms leading to chronic hypercapnia are not fully known although it is believed that inspiratory muscle fatigue and/or weakness leads to CO2 retention and ultimately respiratory failure.
