In most studies, arsenic concentrations in groundwater were controlled by pH dependent adsorption to mineral surfaces, most commonly iron oxide minerals.
In most studies the concentration or pressure gradient is considered as the driving force.
For most studies, cell concentration was adjusted to the suggested OD600 of 1 and 1.5 (Sun et al. 2015) or even 2 (Lu et al. 2011).
In blood/serum/plasma samples of the general population, most studies report lower concentrations (usually <1 µg/L) either "total" or "free" BPA; if detected, BPA concentrations were often close to the LODs of the methods applied.
Like that of Cameron et al., most studies reported that concentrations of fasting glucose provided similar or, as in the AusDiab study, better prediction of diabetes than metabolic syndrome diagnosis (31).
In most studies single E2 concentrations ranging from 0.3 to 100 μg L−1 were used to study effects on gonadal development [ 15– 17, 22, 31, 35, 36] and resulted in percentage of female phenotype between 60, and 100%.
This may relate to the fact that most studies measure stool concentrations without taking the total stool volume into account, thereby potentially concealing overall increased acetate production as a result of dilution due to increased stool volume.
Most studies detected outdoor concentrations of PM2.5 exceeding 10 μg/m, the annual outdoor average that the World Health Organization sets as the lowest cutoff at which lung cancer and cardiopulmonary deaths are likely to increase —a particular concern for chronically exposed hospitality workers.
43 Most studies comparing adiponectin concentration in obese adolescents with its concentration in healthy controls referred to "low levels" when adiponectin concentration was <5 μg/mL, as compared with its concentration in healthy control subjects at >10 μg/mL.
