Ethoxy-nonafluorobutane (C.sub.4F.sub.9OC.sub.2H.sub.5) is used as an immersion medium for immersing an immersion objective of a cryo-light microscope. The cryo-light microscope comprising an immersion objective, a front lens mount holding a front lens of the immersion objective, a sample holder and a cold stage carrying the sample holder further has a heating device coupling a heat flow into the front lens mount.

Ethoxy-nonafluorobutane (C.sub.4F.sub.9OC.sub.2H.sub.5) is used as an immersion medium for immersing an immersion objective of a cryo-light microscope. The cryo-light microscope comprising an immersion objective, a front lens mount holding a front lens of the immersion objective, a sample holder and a cold stage carrying the sample holder further has a heating device coupling a heat flow into the front lens mount.

The invention concerns a flocculation formulation. The invention also concerns the treatment of mine tailings in the form of aqueous effluents comprising solid particles. With the method of the invention, it is possible to separate all or part of the water from an aqueous effluent comprising solid particles.

The invention concerns a flocculation formulation. The invention also concerns the treatment of mine tailings in the form of aqueous effluents comprising solid particles. With the method of the invention, it is possible to separate all or part of the water from an aqueous effluent comprising solid particles.

Ethoxy-nonafluorobutane (C.sub.4F.sub.9OC.sub.2H.sub.5) is used as an immersion medium for immersing an immersion objective of a cryo-light microscope. The cryo-light microscope comprising an immersion objective, a front lens mount holding a front lens of the immersion objective, a sample holder and a cold stage carrying the sample holder further has a heating device coupling a heat flow into the front lens mount.

A unique design for a mobile system that reforms flare gas or natural gas, using air without steam, to directly produce dimethyl ether (DME), a diesel substitute, is disclosed. The system first reforms the air-methane mixture at ambient atmospheric pressures, and then compresses the resulting CO-hydrogen-nitrogen gas mixture to up to 600 psi, and feeds it through a combined reactor which reacts the gas mixture directly into dimethyl ether. The nitrogen is returned by the system back to the atmosphere. DME is an excellent diesel fuel, and can be used to displace significantly costlier and dirtier petroleum-based diesel fuel, while solving a critical problem with flaring. For example, the over 120 billion cubic feet per year that is currently flared in North Dakota could be converted into over 3 million tons of DME.