The phrase "a constant amount for" is correct and usable in written English.
It can be used when discussing a fixed quantity or value allocated for a specific purpose or item.
Example: "The budget allocates a constant amount for maintenance each year to ensure the facilities remain in good condition."
Alternatives: "a fixed amount for" or "a steady amount for".
Blood is also a "regulated" matrix; therefore, there is a constant amount of blood for a given body weight, so measurements can be "normalized" to this amount.
We determined the binding affinity of GST-ARN127(25) and GST-Htt exon 1(25) for F-actin by using a constant amount of protein (16 nM for ARN127, 150 nM for Htt exon 1) mixed with increasing amounts of F-actin (Fig. 1C, D).
The pots were watered daily with a constant amount of tap water for all treatments.
The mesocosms were watered daily with a constant amount of tap water for all treatments.
This study indicates that, for a constant amount of pore former, the size of macropores can be adjusted to reach optimal bone-ingrowth without change in compressive strength.
Our results also suggest that, for a constant amount of flower resources, increasing plant functional diversity and thus decreasing redundancy of potential pollinator feeding niches, decreases the amount of flower resources present per feeding niche.
Logically, for a constant amount of tectonic erosion along the IBM fore-arc, the southern part is more likely to preserve Pacific remnants than the northern part.
For a constant amount of water, the coefficient of thermal expansion of concrete reduces with decreasing cement content (Yao and Zheng 2007).
Growing follicles are assumed to stay in this stage for a constant amount of time t, after which they leave the pool either through ovulation or atresia.
One of these models is the Tsukamoto-French rat model of alcoholic liver disease (Tsukamoto et al. 1985), in which male Wistar rats were fed a liquid diet containing a constant amount of alcohol (13 g/kg/day) for 30 days using an intragastric feeding tube.
