An isotope production system, emanation generator, and process are disclosed for production of high-purity radioisotopes. In one implementation example, high-purity Pb-212 and/or Bi-212 isotopes are produced suitable for therapeutic applications. In one embodiment the process includes transporting gaseous radon-220 from a radium-224 bearing generator which provides gas-phase separation of the Rn-220 from the Ra-224 in the generator. Subsequent decay of the captured Rn-220 accumulates high-purity Pb-212 and/or Bi-212 isotopes suitable for direct therapeutic applications. Other high-purity product isotopes may also be prepared.

An embodiment of the present invention provides a noble gas hydride having the following formula 1: Ng.sub.nH.sub.m. In formula 1, Ng represents a noble gas atom, n represents an integer from 1-8, and m represents an integer from 1-46.

An embodiment of the present invention provides a noble gas hydride having the following formula 1: Ng.sub.nH.sub.m. In formula 1, Ng represents a noble gas atom, n represents an integer from 1-8, and m represents an integer from 1-46.

A method of separation of predetermined gas from the mixture of gases or an atmosphere, wherein said method of separation of predetermined gas from a mixture of gases or an atmosphere comprises passing a mixture of gases or an atmosphere through the reinforced mass selective fluid bandpass filter (8). The reinforced mass selective fluid bandpass filter comprises the mass selective fluid bandpass filter element (9) permanently affixed to the sintered metal load bearing structure (14). The mass selective fluid bandpass filter element consists of quartz glass, of either natural or manmade origin. This method provides removing predetermined gas from the group consisting of: .sup.1H.sub.2, .sup.1H.sup.2H, .sup.2H.sub.2, .sup.1H.sup.3H, .sup.2H.sup.3H, .sup.3H.sub.2, .sup.1H.sub.2O, .sup.1H.sup.2HO, .sup.2H.sub.2O.sub., .sup.1H.sup.3HO, .sup.2H.sup.3HO, .sup.3H.sub.2O, O.sub.2, O.sub.3, .sup.12CO.sub.2, .sup.13CO.sub.2, .sup.14CO.sub.2, .sup.4 CO, N.sub.2, NO, NO.sub.2, NO.sub.x, SiO.sub.2, FeO, Fe.sub.2O.sub.3, SiF.sub.4, HF, NH.sub.3, SO.sub.2, SO.sub.3, H.sub.2SO.sub.4, H.sub.2S, .sup.35Cl.sub.2, .sup.37Cl.sub.2, F.sub.2, Al.sub.2O.sub.3, CaO, MnO, P.sub.2O.sub.5, phenols, volatile organic compounds, and peroxyacyl nitrates.

The invention provides a method and system for separating xenon-krypton mixed gas by hydrate formation process. The system is mainly composed of a gas hydrate generating unit, a heat exchanging unit and a gas-water separating unit: pre-cooled xenon-krypton mixed gas is injected from a bottom of a reaction tower, xenon gas in the mixed gas and water attached to a porous tray generate a xenon gas hydrate; and water is injected from a top of the tower to wet the porous tray, a generated hydrate particle is washed and collected to the bottom of the tower simultaneously to form a hydrate slurry, after passing through the heat exchanging unit, the xenon gas hydrate in the slurry is decomposed to form a gas phase flow and a water phase flow, and then enters the gas-water separating unit, and the xenon gas is separated from decomposed water.

The invention provides a method and system for separating xenon-krypton mixed gas by hydrate formation process. The system is mainly composed of a gas hydrate generating unit, a heat exchanging unit and a gas-water separating unit: pre-cooled xenon-krypton mixed gas is injected from a bottom of a reaction tower, xenon gas in the mixed gas and water attached to a porous tray generate a xenon gas hydrate; and water is injected from a top of the tower to wet the porous tray, a generated hydrate particle is washed and collected to the bottom of the tower simultaneously to form a hydrate slurry, after passing through the heat exchanging unit, the xenon gas hydrate in the slurry is decomposed to form a gas phase flow and a water phase flow, and then enters the gas-water separating unit, and the xenon gas is separated from decomposed water.

According to one embodiment, there is provided a gas regeneration method. The method includes setting a predetermined standard on a basis of a flow rate of rare gas set in a processing recipe. The method includes selecting a rare gas recovery step on a basis of the predetermined standard. The method includes, in the rare gas recovery step, guiding emission gas from a predetermined chamber to a rare gas regenerator. The method includes, in a step other than the rare gas recovery step, causing the emission gas to bypass the rare gas regenerator to discharge the emission gas.

The present invention relates to compositions and methods using protein reporters as imaging agents in .sup.129Xe NMR and MRI applications. It is described that bla and MBP are genetically-encoded proteins that induce a detectable chemical shift during .sup.129Xe NMR, allowing for use as protein reporters in research and clinical applications.

A method and system for purification of helium and CO.sub.2 from a stream containing at least Helium, CO2, nitrogen or methane uses a combination of cryogenic, membrane and adsorption technologies.

According to one embodiment, a gas recovering apparatus includes a casing and a tube. The casing is provided with an inlet through which a gas flows in, a first outlet for discharging a first gas containing a gas to be recovered of the gas, and a second outlet for discharging a second gas other than the first gas of the gas. The casing is evacuated via the first outlet. The tube is provided in the casing from the inlet to the second outlet, and has a high permeability to the first gas and a low permeability to the second gas.