The assessment of harsh working conditions requires a correct evaluation of the metabolic rate. This paper revises the basis described in the ISO 8996 standard for the evaluation of the metabolic rate at a work station from the recording of the heart rate of a worker during a representative period of time. From a review of the literature, formulas different from those given in the standard are ...

Because of the reactivity of oxygen with biologically impor tan t compounds, e.g. unsaturated lipids, SH-conta in ing proteins and cofactors, and redox compounds (see review by Haugaard , 1968), cells in aerobic envi ronments require some mean(s) for protect ion from indiscr iminate oxidation. Since the superoxide free radical, O2, is apparently a major product of the reaction of 02 with reduce...

Protein crystallization is important for structural biology. The rate at which a protein crystallizes is often the bottleneck in determining the protein's structure. Here, we give a physical model for the growth rates of protein crystals. Most materials crystallize faster under stronger growth conditions; however, protein crystallization slows down under the strongest conditions. Proteins requi...

Because of the reactivity of oxygen with biologically impor tan t compounds, e.g. unsaturated lipids, SH-conta in ing proteins and cofactors, and redox compounds (see review by Haugaard , 1968), cells in aerobic envi ronments require some mean(s) for protect ion from indiscr iminate oxidation. Since the superoxide free radical, O2, is apparently a major product of the reaction of 02 with reduce...

For many real-life systems ranging from financial to populationrelated to medical, dynamics is described by a system of linear equations. For such systems, the growth rate λ can be determined as the largest eigenvalue of the corresponding matrix aij . In many practical situations, we only know the components of the matrix aij with interval (or fuzzy) uncertainty. In such situations, it is desir...

The effect of temperature on the evolution of metabolism has been the subject of debate for a century; however, no consistent patterns have emerged from comparisons of metabolic rate within and among species living at different temperatures. We used experimental evolution to determine how metabolism evolves in populations of Drosophila melanogaster exposed to one of three selective treatments: ...

There is an increasing need for satellite-derived accurate chlorophyll-a concentration (chla) products to improve fisheries management in coastal regions. However, the methods used to derive these products have to be evaluated, so the associated uncertainties are known. The performance of three atmospheric correction methods, the near infrared (NIR), the shortwave infrared (SWIR), and the Manag...