DNA degradation by decay from incorporated tritium compounds in Escherichia coli.
DNA degradation by radioactive decay from incorporated tritium and carbon labeled E. coli cells
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DNA degradation by radioactive decay from incorporated tritium and carbon labeled E. coli cells
Free radical formation by decay of constituent tritium atom in cytosine tritiated at 5 position
Energy deposits from decay of tritium incorporated into bacteria, using computer simulation for radiation dose distribution
Inactivation of T4 bacteriophage by tritium decay incorporated into DNA and phage protein
Tritium contamination reduction in small ion accelerators for neutron production, discussing pumping problems and vacuum systems
Molecular hydrogen, methane, water vapor and tritium concentrations near stratopause from air samples collected on Aerobee flight with liquid hydrogen cooled cryocondenser
Vacuum packaged titanium bulk sublimator/ion pump combination for reducing tritium hazard in neutron accelerator
Vacuum package with Ti bulk sublimator/ion pump combination for 150 kv neutron generator tritium decontamination
Radioactive rare gases and tritium in Apollo 12 lunar rocks and in sample return container, noting relationship to solar flare event
Tritium and argon radioactivities and depth variations in Apollo 12 rocks, discussing solar flare and cosmic ray exposure ages
Tritium has been measured, in Surveyor 3 samples, some of which were adjacent to those in which solar-wind-implanted He-4 had previously been measured. Little of the H-3 can be attributed to solar-wind implantation. The upper limit for the H-3/He-4 ratio in the solar wind is four times ten to the minus tenth power and corresponds to a H-3/H-1 limit of two times ten to the minus eleventh power. This limit imposes a requirement on the mixing rate in the solar atmosphere if the H-3 production rate in solar-surface nuclear reactions is greater than 160 sq cm/sec.
It is concluded that He-3 blankets offers considerable promise for tritium breeding in fusion reactors: good breeding potential, low operational risk, and attractive safety features. The availability of He-3 resources is the key issue for this concept. There is sufficient He-3 from decay of military stockpiles to meet the International Thermonuclear Experimental Reactor needs. Extraterrestrial sources of He-3 would be required for a fusion power economy.
Dissolution of biological materials combines the simplicity of oxygen-flask combustion with the reproducibility and purity of the final product, and convenience of direct in-vial collection of the sample by the sealed-tube method. It assures quantitative and reproducible recoveries.
Cosmic ray exposure age of lunar surface material by radioactive isotopes Ar 37 and 39 measurement, investigating temperature dependence
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It is indicated that the observations with the high-resolution solid-state charged-particle telescopes of the IMP-5 and IMP-6 earth satellites have resolved all the hydrogen and helium isotopes of solar-flare origin in groups of solar flares during the period from September, 1969, through November, 1972. The values obtained for the average isotope ratios are given and are compared with previous values. It is concluded that the observed high yields of H(2), H(3) and He(3) can be explained only by high-energy nuclear interactions and that an acceleration process must have taken place in the chromosphere at that time.
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