Caution radioactivity

These four preparations must be labeled Caution—Radioactive Material" and "Do not use after 6 months from date of. standardization."... 

Caution Radioactive Material or Danger Radioactive Material This sign is posted in areas or rooms in which ten times the quantity or more of any licensed material specified in Appendix C of 10CFR20 are used or stored. All containers with quantities of licensed materials exceeding those specified in Appendix C of 10CFR20 should be labeled with this sign. These labels must be removed or defaced prior to disposal of the container in the unrestricted areas. 

Fume hoods used for radioactive matedals should be marked RADIOISOTOPE HOOD and in addition should be labeled with a CAUTION—RADIOACTIVE MATERIALS sign bearing the standard radiation symbol. The isotopes being used should be identified on the label. Under some circumstances, specialized additional signs may be needed. 

The licenseemustposteach areaorroom in which an amount of licensed material more than 10 times the quantity specified in Appendix C to 10 CFR Part 20 is used or stored with a conspicuous sign or signs bearing the radiation symbol and the words CAUTION, RADIOACTIVE MATERIALS or DANGER, RADIOACTIVE MATERIALS. 

CAUTION - AIRBORNE RADIOACTIVE AREA CAUTION - RADIOACTIVE AREA CAUTION - HIGH RADIATION AREA CAUTION - RADIOACTIVE MATERIALS... 

Attach a needle to the syringe. With a needle (caution radioactive material and sharps hazards) draw up the enzyme and label premix into the syringe. Then draw up the approx 1 mL of TM buffer as a vehicle to ensure quantitative transfer of the enzyme and label from the needle and into the syringe. Note that insoluble enzyme preparations will not pass through the polyethylene frit of the syringe. 

Label all containers used to hold radioactive materials with a Caution—Radioactive Material label. Include information about identity of the isotope, its activity, and assay date. 

Caution Handle all radioactive substances according to the radiation safety regulations instituted at each facility approved to handle such materials. Use adequate precautions to protect personal safety and the environment. Dispose of radioactive waste only by following approved guidelines. 

N-(hexadecanoyl)amino-4-nitrophenylphosphorylcholine is not recommended and the assay with the fluorogenic substrate 6-hexadecanoylamino-4-methylumbel-liferylphosphorylcholine should be used with caution [54]. Assay using natural radioactive substrate is probably still the most reliable and will be described below in addition to assay using a fluorogenic substrate. 

Caution must be used in applying the findings of this report to the actual uptake processes occurring in the nuclear fireball. There the situation is much more complicated. Not only are there rapid changes of temperature and pressure and violent turbulence, but the radioactive elements themselves constitute a small fraction of the total vaporized material. It is difficult to estimate how these factors would affect the uptake rates. 

Leak testing can also be done using radiotracers. Here the basic idea is simple— namely, to inject radiotracer into a pipe, flask, or whatever is suspected to be leaking and look for activity that appears outside the container. Suitable caution must be exercised, of course, to be sure that the leaked radioactivity is not a hazard. 

Cells grown for certain days in culture incorporate more radioactivity into sulfatide than into cerebroside during the 16 hr exposure to %7-galactose. Some caution must be exer-... 

Finally, caution should be exerted when determining kinetic data with radiolabelled sugars. Trueb, et al. (32) found that labelled glucose from several manufacturers contained radioactive impurities of unknown structure which often reacted faster than glucose itself. Purification methods can be found in reference 31. 

The different types of radiation sources used in the laboratory, such as radioactive elements emitting oc-particles, /i-particles and y-rays, X-ray sources, lasers and micro-wave radiation are to be treated with caution. Some radiation sources can cause damage to cells in the body. The health and safety guidelines listed in the manuals of the radiation sources should be followed. 

Safety Precaution This laboratory exercise utilizes radioisotopes (3H and IAC). Use caution when handling these compounds. Avoid ingesting and skin contact with these radioisotopes. Wear gloves and safety glasses at all times. Consult the instructor for information on how to properly dispose of the radioactive material produced in this experiment. 

Caution This experiment requires the use of significant amounts of 32P-ATP. Wear gloves and safety goggles at all times during the experiment. Plexiglas shields should be used to screen students from excessive exposure to the radioisotope. Consult the instructor for proper handling and disposal of radioactive waste. 

Since this is an in-process test, special caution must be given to radiation protection. The test equipment should be placed within a closed and shielded unit and a system should be in place to collect any radioactive spill from the test. 

If absolutely necessary, wastes can be transported directly to a designated burial site. The unsatisfactory results experienced in the disposal of properly packaged radioactive waste by burial indicate that extreme caution should be used when resorting to this method for disposal of chemical carcinogens. 

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