66 -- ELECTRON SPIN RESONANCE (ESR) SPECTROPHOTOMETER NOTICE OF INTENT TO SOLE SOURCE. The National Institute for Occupational Safety and Health (NIOSH) in Morgantown, WV plans to purchase a Electron Spin Resonance (ESR) Spectrophotometer which is suitable for L-Band whole animal or human hand/finger in vivo evaluations. This purchase is for the non-invasive measurement of free radicals generated in workers exposed to toxic chemicals and carcinogens. We plan to custom develop a loop-gap resonator in collaboration with the NIH EPR Center at Dartmouth Medical School. Technology to develop sensitive loop-gap resonator and portable ESR with L-band capabilities are not known to exist from any source other than Magnettech GMBH, Berlin, Germany. Magnettech's ESR Spectrophotometer #CCU-5 control unit includes field control, hall sensor unit, field modulation synthesis, field scan initiation, signal acquisition control and analysis software, PC controlled magnet with freely useable pole gaps 110 mm, magnetic field 0-50 mt, field stability, 1.5 mt/L-band homodyn with cavity with frequency range 1-1.5 GHz designed for mouse, rat or human arm or finger. Microwave power 50 MW, attenuation 0,1,2,3,6,10,20,30 DB, and power supply 110 V. The signal amplified frequency range 10 Hz -- 300 KHz, amplification 1,2,4,8 (fine) 1,10,100,1000 (coarse); resolution 12 BIT; field modulation frequency 25 KHz; Phase 0-360 deg; coarse and fine attenuation; field modulation accuracy 0.5%; field control with current regulation; 16 bit scan BO setting, scan 12 bit resolution; scan range 0-2 BO; scan time 1S, 5S, 10S, 20S, 1M, 2M, 5M, 10M, 30M, 1H; stability 10x6/min; magnet stability and homogeniety 1x10-5; pole gap 150 mm, available gap 110m; magnetic field 50 MT; ready for surface coil and loop gap use with a frequency of 1200 MHz with an unloaded Q 950. Magnettech GMBH, Berlin, Germany. The Government intends to negotiate on a sole-source basis with the Magnettech GMBH, Berlin, Germany. This notice of intent is not a request for quotations. Organizations may respond within 10 days afterpublication of this notice and demonstrate that they have the expertise and capabilities necessary to meet the stated requirements. Forward information to : Brenda L. Goodwin, Reference: RQ99-042, DHHS, PHS, CDC, NIOSH, ALOSH, 1095 Willowdale Road, Morgantown, WV 26505. Information received will generally be for the purpose of determining whether to conduct a competitive procurement. This notice is issued for informational purposes. Posted 08/13/99 (W-SN367660).

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