Abstract: A device for collecting a blood sample from a plastic segment tube into a receptacle uses a cylindrical housing containing a hollow needle to puncture the segment tube as it is inserted into the upper port of the device. A series of ribs with medial edges are arranged in a radial pattern around the needle within the upper port to guide and support the segment tube as it is inserted. The ribs are separated by slots that also guide the sealed end of the segment tube. An annular recess around the lower port of the device holds the rim of the receptacle and allows blood released by the punctured segment tube to drain into the receptacle. The annular recess accommodates a wide range of test tube diameters, and exerts only a downward force on the rim of the receptacle when a segment tube is inserted into the upper port of the device.

Abstract: The present invention provides a process that employs both non-selective flotation and oxidative leaching of the resulting concentrates to recover an increased amount of copper from porphyry copper ores. The non-selective flotation step uses collectors and conditions, such as pH, that are conducive to the strong flotation of sulfide minerals generally. In the oxidative leach, the copper sulfide minerals in the concentrate fraction are oxidized to copper compounds, which are soluble in the leach solution. The oxidative leach includes the use of ammonia and sulfite under agitation leaching conditions to convert the copper sulfide minerals into ammonia soluble forms.

Abstract: A method for the flotation processing of mineral ores is disclosed. At least one collector is introduced into the flotation process by atomization. In a preferred aspect of the invention, the collector is provided as a mixture of the thiol and corresponding oxidized thiol (e.g., a dithiol).