"levels close to zero" is a correct and usable phrase in written English.
It can be used to refer to a small, nearly insignificant amount of something. For example: "Despite the difficult economic situation, unemployment levels remained close to zero."
According to the study of Haeseler and colleagues, dysfunction of sodium channels is related to endotoxin levels (LPS), yet patients in the post intensive care period should feature endotoxin levels close to zero [21].
The consolidation of the materials was achieved via the use of the Cold Gas Dynamic Spray (also known as Cold Spray) technique, where the particles are accelerated to high speeds and consolidated via plastic deformation upon impact, forming activated nanocomposites in arbitrary shapes with porosity levels close to zero.
The highest levels were observed for STS and EST, and the lowest levels (close to zero) were observed for the 17-β-hydroxysteroid dehydrogenase isoenzymes.
A review of the literature on hand hygiene suggests that hand washing with soap (HWWS) can reduce micro-organism levels close to zero, 61 62 mainly through the mechanical action of rubbing and rinsing.
A great variability of expression among the patients was observed, ranging from 0 to 2376 amol/mg RNA, with the highest levels being observed for STS and EST, and the lowest levels (close to zero) observed for both HSD isoenzymes (Table 1).
However, very quickly, the protective factors of income, education, and social network support overwhelm the negative factors and the threat of homelessness diminishes and remains at levels close to zero (as indicated by the flat line at the bottom of Figure 10).
America's Federal Reserve kept interest rates at a level close to zero.
Also, the Mixnet packet size affects the queue length as larger sizes reduces the queues to a level close to zero.
The external concentration of glycerol is kept constant at a level close to zero.
During its first reopened year, in 2001, Bruichladdich used barley with a phenol level closer to ten p.p.m.
In this case, it may be expected that at a dose far lower than the lowest tested dose levels, the effect will decrease again, because infinite toxicity cannot be observed at dose levels close to the zero dose.
