Sentence examples for free glassware from inspiring English sources

Now that Procter & Gamble is trying to win back shoppers who have switched to store brands by enclosing $30 coupon booklets in packages of products like Charmin, Crest and Olay, how long will it be before the company revives vintage promotions like packing free glassware and towels inside detergent boxes?

Endotoxin free glassware and plasticware were used in all experiments.

The dilute solutions, prepared with chlorine-free glassware, were filtered through a 0.22 μm membrane (Millipore, Bedford, MA, USA) for daily use.

Samples were collected just after making the solution (before tadpoles were added) and shipped frozen in chemical-free glassware (Fisher Scientific Co., Houston, TX).

The diluted solutions, prepared with chlorine demand-free glassware, were filtered through a 0.22-μm-pore-size membrane (Millipore, Bedford, MA, USA) for daily use.

The plasma samples were drawn in endotoxin-free glassware and separated from blood cells by centrifugation at 4°C for 15 min at 1400 × g and then frozen at −70°C until the samples were analysed.

To prevent contamination by endotoxin of chitosan solutions, chitosan powder was dissolved in double-distilled water filtered by MilliQ (Millipore, Billerica, MA, USA), at a resistance below 18.2 MΩcm and levels of trace organic compounds below 30 parts/billion with certified 1.0 N HCl, using heat-treated endotoxin-free glassware and stir bars.

Only certified nuclease-free plastic ware and/or glassware baked at 400°C for 4 h were used.

To reduce the background interference with the very low levels of TBARS present in exhaled breath condensates, all glassware was washed in soap-free detergent followed by rinsing with distilled water and ethanol before use.

Glassware used in this experiments were carbon free (Vital et al. 2012).

Trace elements were not supplemented with iron and all glassware was washed with concentrated HCl to remove free iron.