The fired or sintered material is discharged into a trough between an inclined traveling hearth and a fixed wall until the trough is substantially filled with the material. A gaseous cooling medium is conducted continuously through the fixed wall into the material in the trough, and material is carried on the traveling hearth in an upwardly inclined direction out of the trough and then horizontally away from the trough, the speed at which material is carried on the traveling hearth and the rate ...

The present invention relates to a novel use of sulfates of the amylopectin fraction of starch, in which these compounds are added to blood samples in order to act both as anticoagulants and also to enhance the recovery and identification of bacteria and mycoplasma in these samples.

Successive sections of a strand material are advanced along a predetermined path into an entrance end of, through, and then out of a laterally closed chamber. The entrance end of the chamber is in communication with the air of the ambient atmosphere. High velocity jet streams of treating material are directed into the chamber toward oblique converging engagement with the successive sections of the strand material. Substantial components of the velocities of the jet streams are in the direction o...

A method for the detection and for the differential diagnostic determination of leukemic cells, comprises treating leucocytes with a supravital dye and evaluating the different staining of healthy and leukemic cells. Preferred dyes are triphenylmethane dyes of the phthalein and sulphophthalein classes.

A sample of material to be tested for the presence of biologically active agents, such as bacteria, is introduced into a sealable container partially filled with a culture medium comprising a .sup.13 C-labeled fermentable substrate, the remainder of the container being filled with a culture gas, the container and its contents are subjected to conditions conducive to biological activity for a predetermined period sufficient for fermentation of the medium to produce carbon dioxide after which the ...

A broth medium for the detection of Pseudomonas aeruginosa in urine. The medium employs cetyl trimethylammonium bromide to inhibit growth of unwanted organisms that normally give positive results in tests for P. aeruginosa.

A storage stable Lowenstein-Jensen medium is prepared by freeze drying the liquid medium to provide a powder having a moisture content of less than 8% by weight. The dried powder is stable at ambient temperature for at least one year and may be easily reconstituted to the fluid Lowenstein-Jensen medium by simple mixing at ambient conditions.

Improvements in the sensitivity and reproducibility of nephelometric endotoxin determinations using endotoxin-activated enzyme from Limulus amebocyte lysate are achieved by contacting endotoxin-coagulated lysate with an ionic surface active suspending agent, generally a mixture of detergent and suspending agent. Instrumentation improvements further enhance results.

In accordance with the invention there is provided a method for identifying or testing an anaerobic microorganism wherein an aqueous suspension of a culture of the microorganism having a culture density of about 2.times.10.sup.8 cells/ml, is brought into contact with an aqueous solution containing an oxidation-reduction indicator which substantially irreversibly undergoes a change in color upon being reduced and a biodegradable test substrate compound which, when catabolized by a microorganism, ...

Improvements in the sensitivity and reproducibility of nephelometric endotoxin determinations using endotoxin-activated enzyme from Limulus amebocyte lysate are achieved by contacting endotoxin-coagulated lysate with an ionic surface active suspending agent, generally a mixture of detergent and suspending agent. Instrumentation improvements further enhance results.