[Usefulness of color Doppler ultrasonography in diagnosis of retinal detachment]. / Przydatnosc kolorowej ultrasonografii dopplerowskiej w rozpoznawaniu odwarstwienia siatkówki.

PURPOSE: Possibility of visualising the vessels within retinal detachment. MATERIAL AND METHOD: Examinations were performed using "Color Doppler" and "Power Doppler" methods on 46 eyes with linear hyperechogenic lesions within vitreous body found in US B-mode examination. RESULTS: The results show the possibilities of Doppler examination in visualising branches of the central retinal artery within the detached retina. The presence of vessels in the membranous proliferations was not found. CONCLUSION: Color Doppler ultrasonography can be used in localising the position of retina, especially when proliferative lesions and detachment coexist.

Search for stable strange quark matter in lunar soil.

We report results from a search for strangelets (small chunks of strange quark matter) in lunar soil using the Yale WNSL accelerator as a mass spectrometer. We have searched over a range in mass from A = 42 to A = 70 amu for nuclear charges 5, 6, 8, 9, and 11. No strangelets were found in the experiment. For strangelets with nuclear charge 8, a concentration in lunar soil higher than 10(-16) is excluded at the 95% confidence level. The implied limit on the strangelet flux in cosmic rays is the most sensitive to date for the covered range and is relevant to both recent theoretical flux predictions and a strangelet candidate event found by the AMS-01 experiment.