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Introduction to Environmental Engineering Calculations
Published in Danny D. Reible, Fundamentals of Environmental Engineering, 2017
The mass fraction is defined as mass of contaminant per unit mass of solvent or sorbent phase. This measure of concentration is commonly used for contaminants on solid sorbents. A typical unit might be milligram of contaminant per kilogram of dry soil or sediment. This might also be referred to as ppm, a very different ppm than described above for volume fraction in gases and vapors. Weight fraction is also used for describing contaminant concentration in a liquid phase, but it is rarely if ever used in describing contaminant concentration in a gas phase. The weight fraction of a component A in a bulk phase also containing a component B is defined as () ωA=mAmA+mB
Influence of various trace metallic additions and reinforcements on A319 and A356 alloys—a review
Published in Cogent Engineering, 2022
D Srinivas, Gowrishankar M C, Pavan Hiremath, Sathyashankara Sharma, Manjunath Shettar, Jayashree P K
Hu et al. (2018) prepared nano-SiC/A356 composites using squeeze casting after ultrasonic treatment. Results indicate that the addition of SiC has a significant impact on primary α(Al) crystals in SiC/A356 nanocomposites. Morphology of α(Al) grains changes from coarse dendrites to rosette crystals with the increase in nano-SiC content and grain size is reduced. The average SDAS of α(Al) reduced compared to that of the matrix alloy with an increase in the SiCp content, particularly when SiC content is 2 wt.% (mass fraction).
Boiling points of the propylene glycol + glycerol system at 1 atmosphere pressure: 188.6–292 °C without and with added water or nicotine
Published in Chemical Engineering Communications, 2018
Anna K. Duell, James F. Pankow, Samantha M. Gillette, David H. Peyton
Mass fractions were used as the basis of the preparations rather than volume fractions because of greater ease, with viscous liquids, in measuring mass versus volume amounts delivered. Vial caps were wrapped with paraffin film. Each sample was mixed by shaking for five minutes then stored in the dark for no more than 24 h before testing.
Application of interval arithmetic in numerical modeling of cryopreservation process during cryoprotectant loading to microchamber
Published in Numerical Heat Transfer, Part A: Applications, 2023
Alicja Piasecka-Belkhayat, Anna Skorupa
The mass fraction of species j is the ratio of the mass of a given component to the mass of the entire mixture. In interval form, it can be computed using the relationship: