Test tube for easy enumeration and cultivation of anaerobic and

Details Test tube for easy enumeration and cultivation of anaerobic and Test tube for easy enumeration and cultivation of anaerobic and

1977-02-07

1979-02-20

Reese, Robert M.

Textiles: fiber preparation

195127, 356246, 215 6, B65D 104, C12B 102, G01N 110

Patent

active

041404890

ABSTRACT:
A test tube having an inner tube that allows one to insert a bar to create a dark background is described. This system is actually an ordinary or screw-capped test tube with a smaller sized test tube inverted and fused to the bottom. The design permits a thin layer of any agar medium to solidify around the inside edge of the larger tube. The colonies developed in the agar can then be easily counted by creating a dark background by inserting a dark colored rod through the opening of the inner tube.
Alternatively, a permanently dark-colored inner tube can be inverted and fused to the bottom of the outer tube. In this case, it is not necessary to insert a rod to create a dark background and the enumeration of microbial colonies is as easy as the method described above.

REFERENCES:
patent: 2470806 (1949-05-01), Del Cueto
patent: 2587221 (1952-02-01), Richardson et al.
patent: 3481712 (1969-12-01), Bernstein et al.
patent: 3627432 (1971-12-01), Bergmann
patent: 3807955 (1974-04-01), Note, Jr. et al.
Aloe Scientific, Catalog 103, 1952, p. 424.

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