Sentence examples for free polystyrene from inspiring English sources

Blood was transferred into DNase/RNase free polystyrene conical tubes and centrifuged at 2, 200 rpm for 20 min at room temperature (RT).

This method was also found to be valid for preparing bromine-free polystyrene supports.

Here, we have carried out a thorough and systematic study on the effect of solution conductivity on the electrospinning of bead-free polystyrene (PS) fibers when dimethylformamide (DMF) was used as the solvent.

The purpose of our study was to synthesize surfactant-free polystyrene spheres with a controllable size (from 80 to 350 nm) and charge (from −50 to +40 mV) using a single-step and facile process, and to demonstrate their applications as templates for facilitating the production of porous particles with a tunable internal hole structure.

Only phthalate-free polystyrene flasks and 12-well plates (NUNC, Roskilde, Denmark) were used.

Samples were ground with a drill (AD-18 S Bionic Drill set) holding an RNAse-free polystyrene pistil.

In order to probe whether the glass transition mechanism is also size-independent, segment dynamics of free-standing polystyrene (PS) films is determined by considering the temperature- and thickness-dependent number of styrene segments Nα(T,D) in the cooperative rearranging region (CRR).

A reduction of Tg in the order of 10 °C 30 °C was observed near free surfaces of polystyrene (PS) reaching tens of nanometers deep into the material.

Table 4 Contact angles and surface free energy parameters of polystyrene with and without a biosurfactant adsorbed layer Polystyrene surface Contact angles (degree) Parameters (mJ m−2) Water Glycerol Hexadecane Dimethyl-sulfoxide γ γLW γAB γ− γ+ Uncovered 88 ± 2 79 ± 1 10 ± 2 51 ± 1 29.1 27.1 2.0 4.0 0.25 Covered with biosurfactant 86 ± 2 75 ± 2 41 ± 2 51 ± 1 27.2 21.2 5.0 4.3 1.45.

Free volume behavior in polystyrene thin films with thickness ranging from 22 to 1200 nm on silicon substrates was studied by energy variable positron annihilation lifetime spectroscopy (EVPALS).

The average free volume radius of polystyrene was proved to increase from 0.30 nm (PPE: 0%) to 0.34 tun (PPE: 100%) and the average intensity, relevant to free volume content, decreased with the increase of PPE.