Dielectric constants of aqueous solutions of dextrose and sucrose

Abstract

Th e dielectric constants of aqueous solut ions of dextrose and of sucrose prepared from N BS Standard SampJes were d etermin ed a t 20°,25°, a nd 30° C fo r cOJlcentra t ions upto 50 and 60 p erce nt by we igh t, respective ly. A bri dge method wa s used , a nd t he so urceE of errol' involved are con sidere d. Th e r esu lts, relative to a se lected valu e for water, ar e considered t o be accurate to 0.05 percent or better and are expr essed in term s of an e mp iri cal e quation for the pu rposes of in terpola t ion.

Dielectric constant of water from 0 to 100 C

“…The Wagner earth permits use of either two-or three-terminal cells, and in conjunction with proper 1 shielding, either eliminates or fixes the influence of ground admittances and interhranch couplings. A schematic diagram of the circuit is shown in figure 1. The basic network and its components, with the exception of the unknown arm and standard capacitor, are substantially the same as those described previously [7] .…”

“…Of t.he remaining terms in eq (2) , Cc is not signiflCant III th e present case as long as good electric contacts are main tained. The sum of the errors Ca+ Cb, which depend upon the r esistance balance was obtained by a modification of the pro cedUl'~ previously described [7]. The dielectric cell was replaced by a conductivity cell of negligible capacita~ce , ' with l kept very nearly the same.…”

Automated electrorotation shows electrokinetic separation of pancreatic cancer cells is robust to acquired chemotherapy resistance, serum starvation, and EMT

“…Modeled as a pure sucrose solution, the media was assumed to have a relative permittivity of 74.2. 31 For experimentation, 70% confluent adhesion cultures and suspension cultures kept at 3 Â 10 5 to 2 Â 10 6 cells per ml were cultured in Corning CellBIND surface 25 cm 2 flasks from ThermoFisher Scientific (Waltham, MA) with 5 ml of cell culture media supplemented 10% with fetal bovine serum and 100 units penicillin, 0.10 mg streptomycin, and 0.25 g amphotericin B per ml in a 5% CO 2 , 37 C humidified incubator. Cell cultures included BxPC3 pancreatic, PANC-1 pancreatic, and suspension U937 lymphoma human cancer cells from the American Type Culture Collection (ATCC; Manassas, VA).…”

“…Medium of conductivity was measured to be 70 mS/m, and relative permittivity was calculated based on Ref. 31 to be 74.12. Differences in the crossover frequency between the cancer cells and the white blood cells allow for a positive DEP selection.…”

Crystallization by Antisolvent Addition and Cooling

“…The dielectric constant of water is 78.54 at 25°C. A 50 weight percent of sucrose aqueous solution has its dielectric constant equals to 60.19; a similar dextrose solution has a dielectric constant of 63.39 (Malmberg and Maryott, 1950). Dielectric constants of ethanol and acetone at 25°C are 24.55 and 20.7, respectively.…”