The plate can be made of platinum or filter paper which has been presoaked in the liquid to maintain constant mass.
42.
In 1992, responding to the continued popularity of white filter paper, Melitta developed an oxygen-bleaching process to produce white paper without chlorine.
43.
However, in the presence of extra phenylalanine leached from the impregnated filter paper disk, the inhibition is overcome and the bacteria grow.
44.
During filtration, the filtrate enters and is held by the flask while the residue remains on the filter paper in the funnel.
45.
In order to achieve this, a cone-like shaped piece of filter paper is usually folded into a cone and placed within the funnel.
46.
It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity.
47.
I saw one worker who trimmed filter paper for an aerospace application putting a padlock though the scissor handles when not in use.
48.
A drop of blood is usually obtained by pricking the heel of a newborn infant and is collected on a piece of filter paper.
49.
She hands us each a small packet containing a piece of filter paper saturated with a compound called propylthiouracil, known in taste circles as PROP.
50.
A tiny, round piece of filter paper containing a virus that attacks anthrax bacteria is put onto a petri dish with the suspected anthrax sample.
