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Title 41 of the Code of Federal Regulations ("CFR"), titled Public Contracts and Property Management, is the portion of the CFR that governs federal government public contracts within the United States. It is available in digital or printed form. Title 41 comprises four volumes, and is divided into six Subtitles.
The sonoluminescence effect was first discovered at the University of Cologne in 1934 as a result of work on sonar. [3] Hermann Frenzel and H. Schultes put an ultrasound transducer in a tank of photographic developer fluid.