The phrase "a decrease in hydrogen" is correct and usable in written English.
It can be used in contexts discussing scientific measurements, chemical reactions, or environmental changes related to hydrogen levels.
Example: "The study revealed a significant decrease in hydrogen levels over the past decade, impacting local ecosystems."
Alternatives: "a reduction in hydrogen" or "a decline in hydrogen".
A decrease in hydrogen to carbon ratio represents more condensed polyaromatic type of coke [6].
The tests revealed a decrease in hydrogen storage ability of the containers after 53 (LaNi4.8Sn0.2) and 42 (Labsorption desorptiontion–desorption cycles.
Steam content in reformate at 30 mol% or less was found to improve HDS performance compared with dry reformate, despite a decrease in hydrogen partial pressure.
The temporal evolution of the fluid compositions in that time span reveals a decrease in hydrogen sulfide concentrations over the entire period after 1992 with a slight increase in November of 1995 (Figure 2).
Our experiments have provided evidence for the mechanism of IONs acting as nanozymes in planta, revealing coupling between a decrease in hydrogen peroxide contents in the leaves of Brassica napus and introduction of IONs.
The strong interaction of these polyanilines with PVA through hydrogen bonding between hydroxyl groups (of PVA) and amine and positively charged amine and imine sites (of SPAN and PAPSAH) leads to a decrease in hydrogen bonding among PVA subchains and to a partial miscibility.
A decrease in the hydrogen bond strength of a weakly hydrogen bonded internal water is detected in both CaChR1 and CrChR2, but the bands are much broader in CrChR2, indicating a more heterogeneous environment.
This is due to a decrease in the hydrogen evolution overpotential, resulting in higher dissolution rates of metals.
The reduction of the catalyst layer length induces a decrease in H2 (hydrogen) concentration as well as pressure loss.
The results revealed that molybdate adsorbed on the metal surface led to a decrease in the hydrogen permeation current density and, accordingly, the pitting corrosion.
A decrease in intracellular hydrogen ion concentration may stimulate the activity of phosphofructokinase, a key enzyme in the glycolytic cycle, which could result in increased intracellular adenosine triphosphate (ATP) hydrolysis and increased VO2 [29, 29].
