Abstract: Apparatus for imaging of the inner structure of the breast, the apparatus comprising: a source of light illuminating the breast when the source of light is situated at a first position of the breast; and a detector which when situated at a second position relative to the breast, detects light from said source passing through a portion of the breast from the source; wherein the source of light comprises either: a non-laser radiant source and at least one optical filter situated between source and the detector that limits the light reaching the detector from the source to a visible spectral band limited to wavelengths in the range from 490 to 510 nanometers or 520 to 580 nanometers; or a source of laser light operating at an output at between 490 and 510 nanometers or between 520 and 580 nanometers or is a tunable laser light source operating at a wavelength between 490 and 510 nanometers or between 520 and 580 nanometers.

Abstract: Apparatus for imaging cross-sectional views of the inner structure of the breast, the apparatus comprising: a source of light (12) illuminating the breast situated at a first position of the breast a matching interface (19) situated, at a second position, on a surface of the breast, which reduces scatter caused by said surface; and an imaging detector (24) focused on a plane within the breast, through said matching interface.

Abstract: The present invention relates to a method for the localization of bleeding in the gastrointestinal tract. More particularly, the present invention relates to a method wherein gastric or intestinal contents at different locations in the gastrointestinal tract are continuously checked for their hemoglobin contents. The invention also relates to an apparatus adapted to carry out the method of the invention.

Abstract: A method of measuring sperm motility comprises directing a beam of light at an angle at less than 30.degree. into a thin film suspension of the sperm, and counting the number of reflections per unit time to provide an index of sperm motility. Apparatus for measuring sperm motility according to the above method comprises a holder including a pair of transparent plates beads for holding the sperm suspension in the form of a relatively thin film, means for directing the beam of light into the thin film suspension, an optical detector for detecting the reflection, and a counter for counting the number of reflections per unit time.

Abstract: Oil products and a high nitrogen content residue are obtained by growing halophilic algae in saline solution, harvesting an algae-salt water slurry, solvent extracting said slurry, and recovering the product and residue. Use of a growth promoting enzyme, salt concentration gradients for harvesting, and water insoluble solvents at elevated temperatures are preferred.

Abstract: Apparatus and method are described for using ultrasonic waves for removing microscopic particles from a liquid medium, such as algae from a solar or refuse pond, or blood cells from blood. The described apparatus includes an ultrasonic generator propagating ultrasonic waves of over one megacycle per second through the liquid medium to cause the flocculation of the microscopic particles at spaced points. In two described embodiments, the ultrasonic waves are propagated in the horizontal direction through the liquid medium, and baffle plates are disposed below the level of propagation of the ultrasonic waves. The baffles are oriented to provide a high resistance to the horizontal propagation therethrough of the ultrasonic waves and a low-resistance to the vertical settling therethrough of the flocculated particles.