"They filled test tubes with warm water, placing them in a 'huddle' inside a glass beaker.
In 1901, while attempting to determine the moisture content in a granule of starch, a botanist at the New York Botanical Garden, Alexander P. Anderson, filled hermetically sealed test tubes with cornstarch and wheat flour, and toasted the contents in a five-hundred-degree oven.
Yves J. Ribeill, founder of Scynexis, a North Carolina drug company that will receive much of the grant, said his chemists would fill legions of tiny test tubes with parasites swimming in calf serum, and legions more with mammalian tissue cells, and dose them all with thousands of molecules from chemical "libraries".
San Francisco-based startup Atomwise is looking to replace test tubes with supercomputers during the drug development process.
Cadaverine fermentation by recombinant E. coli was performed in test tubes with a 5 ml working volume.
Five 0.3-mL samples were pipetted from this solution and transferred to five glass test tubes with stoppers.
Blood samples were taken into test tubes with no added anticoagulant, with the exception of the samples taken for glucose determination as these contained the anticoagulant Na fluoride.
Fresh medium was inoculated in test tubes with the starter culture and grown at 35.5°C with continuous agitation at 30 rpm.
Aliquots (50 μL) of the seed culture were then transferred to 50-mL test tubes with 5-mL of media prepared specifically for the proceeding studies.
Test tubes with homogenates withstand 30 min in a boiling water bath, followed by centrifugation at 3000 rpm for 10 min.
Test tubes with homogenates withstand 30 min in a boiling water bath, followed by centrifugation at 3000 rev/min for 10 min.
