A coalescence separator for separating liquid droplets from a gas flow has a gas inlet and a gas outlet. A multi-layer structure of a plurality of individual layers of a coalescence filter medium is arranged between the gas inlet and the gas outlet, wherein the coalescence filter medium is provided with a glass fiber paper with glass fibers. The individual layers of the coalescence filter medium each have an individual layer thickness of more than 0.8 mm and maximally 5 mm, a grammage of greater than 80 g/m.sup.2 and less than 500 g/m.sup.2, and an air permeability of 350 l/m.sup.2s to 1,800 l/m.sup.2s. The multi-layer structure has between 2 and 80 of the individual layers.

A method for producing 225.sup.A including: a method (X) for purifying a .sup.226Ra-containing solution, including an adsorption step of allowing a .sup.226Ra ion to adsorb onto a carrier having a function of selectively adsorbing a divalent cation by bringing a .sup.226Ra-containing solution into contact with the carrier under an alkaline condition, and an elution step of eluting the .sup.226Ra ion from the carrier under an acidic condition; a method for producing a .sup.226Ra target, including an electrodeposition liquid preparation step of preparing an electrodeposition liquid by using a purified .sup.226Ra-containing solution obtained by the method (X), and an electrodeposition step of electrodepositing a .sup.226Ra-containing substance on a substrate by using the electrodeposition liquid; and a step of irradiating a .sup.226Ra target produced by the method for producing a .sup.226Ra target with at least one selected from a charged particle, a photon, and a neutron by using an accelerator.

A purification system for nitrogen gas and xenon gas in water and a static isotopic analysis method thereof are provided. The system includes a sample container, a carbon dioxide ice cold trap, a gas delivery main pipe and a mass spectrometer for noble gas communicated sequentially. The gas delivery main pipe is provided with branch pipelines communicated with a cryo pump and a vacuum pump set respectively, the mass spectrometer for noble gas is communicated with the vacuum pump set, and the cryo pump adsorbs or releases nitrogen gas and/or xenon gas by setting different temperatures of the cryo pump. Inlet and outlet sides of the carbon dioxide ice cold trap are respectively provided with a first valve and a second valve. Fourth and fifth valves are respectively disposed between the gas delivery main pipe and the vacuum pump set, and between the gas delivery main pipe and the cryo pump.

In an aspect, an electrochemical hydrogen isotope recycling apparatus for recycling a feedstream comprising a single isotope of hydrogen, comprising: an electrochemical recycling unit, the unit comprising an anode; a cathode; an isotope-treated, cation exchange membrane operatively disposed between the anode and cathode, the isotope-treated, cation exchange membrane having heavy water containing the isotope of hydrogen therein, the unit configured to receive the feedstream containing the single isotope of hydrogen; wherein the single isotope is deuterium or tritium and when the single isotope is deuterium, the heavy water comprises D.sub.2O and when the single isotope is tritium, the heavy water is T.sub.2O.

In an aspect, an electrochemical hydrogen isotope recycling apparatus for recycling a feedstream comprising a single isotope of hydrogen, comprising: an electrochemical recycling unit, the unit comprising an anode; a cathode; an isotope-treated, cation exchange membrane operatively disposed between the anode and cathode, the isotope-treated, cation exchange membrane having heavy water containing the isotope of hydrogen therein, the unit configured to receive the feedstream containing the single isotope of hydrogen; wherein the single isotope is deuterium or tritium and when the single isotope is deuterium, the heavy water comprises D.sub.2O and when the single isotope is tritium, the heavy water is T.sub.2O.

The present invention relates to a method for detecting of a mutant DNA using a probe, comprising: (1) contacting a sample containing a single-stranded DNA which has a substituted nucleotide, a deleted nucleotide region, or an inserted nucleotide region (mutant-type DNA), or/and a wild-type single-stranded DNA (wild-type DNA) corresponding thereto with the probe which hybridizes with both single-stranded DNA, to form a hybrid with the mutant-type DNA (mutant-type hybrid) or/and a hybrid with a wild-type DNA (wild-type hybrid), wherein at least one of the obtained mutant-type hybrid and wild-type hybrid has the stem structure; (2) separating the obtained mutant-type hybrid or/and wild-type hybrid by electrophoresis on the basis of presence or absence of the stem structure or difference in the stem structure; and (3) detecting the presence or absence of the mutant-type DNA in the sample.

An object of the present invention is to provide a method for purifying efficiently and easily a .sup.226Ra-containing solution obtained when .sup.225Ac is produced from a .sup.226Ra target, a method for producing a .sup.226Ra target by using the purified .sup.226Ra-containing solution obtained by the above purification method, and a method for producing .sup.225Ac including these above methods. The method for purifying a .sup.226Ra-containing solution according to the present invention is characterized by including an adsorption step (R1) of allowing .sup.226Ra ions to adsorb onto a carrier having a function of selectively adsorbing divalent cations by bringing a .sup.226Ra-containing solution (a) into contact with the carrier under an alkaline condition; and an elution step (R2) of eluting the .sup.226Ra ions from the carrier under an acidic condition.

An object in mounting an engine on an exhaust gas purifier is to ensure the coupling strength between the engine and a hanger and to balance the whole engine at the time of lifting while avoiding interference between the exhaust gas purifier and the hanger. An engine apparatus includes an exhaust gas purifier configured to purify exhaust gas from the engine. The exhaust gas purifier is mounted on the engine through a mounting base. A lower end of the hanger, which is configured to lift the engine, is fastened to the mounting base. An upper end of the hanger is extended along an outer periphery of the exhaust gas purifier.

The present invention relates to a method and equipment for recovering heat from exhaust gas removed from an industrial process, such as an electrolysis process for the production of aluminum. Heat is recovered by means of an extraction/suction system, where the exhaust gas contains dust and/or particles. The heat is recovered as the exhaust gas being brought into contact with heat-recovery elements. Flow conditions and the design of the heat recovery elements are such that the deposits of the dust and/or particles on the surfaces stated are kept at a stable, limited level. In preferred embodiments, the heat-recovery elements have a circular or an extended, elliptical cross-section and may be equipped with fins or ribs.

An air cleaner system that potentially reduces debris entering a prime mover (e.g., engine) during removal/replacement of an air cleaner. In one embodiment, the engine includes a shroud defining an air cleaner compartment. The engine further includes a tubular air feed port defining a combustion air intake. The air feed port terminates at an end face located at or within the air cleaner compartment, and a lower portion of the end face is notched relative to other portions of the end face. In other embodiments, an engine oil drain system is provided that selectively positions a distal end of an oil drain tube at a drain position located away from the engine. The oil drain tube may also be repositioned to a stored position, wherein the distal end of the drain tube attaches to a nipple connected to either an engine housing or surrounding structure.