Abstract: A device is provided for the controlled sampling of fluid into a well formed within an upper surface, in which the well may be filled under dynamic wetting conditions by contacting a droplet on the upper surface with the top of the well. Wetting is supported by the increased hydrophilicity of the upper surface relative to that of the well side wall. The relative difference in hydrophilicity may be achieved by providing an upper surface with greater roughness than the side wall, effectively amplifying the hydrophilicity of the upper surface relative to that of the side wall. Wells are preferably formed in an unpolished surface of a siliconwafer, and can achieve a stable film with micron depth and an aspect ratio in excess of 100.

Abstract: The method for improving the initial activity of activated hydrazine is used as corrosion protection for reservoir drinking water and for the wet preservation of installation parts no longer in use. It is the object of the invention to increase the initial activity of hydrazine solutions, activated with complexes of trivalent cobalt, with respect to oxygen dissolved in water, and to develop a suitable method for the activator-rich hydrazine solution. The object is accomplished in that trivalent phenols, preferably pyrogallol, are added in small amounts to the activator-rich hydrazine solution.

Abstract: The method for improving the initial activity of activated hydrazine, is used as corrosion protection for reservoir drinking water and for the wet preservation of installation parts, which are no longer being used. It is the goal of the invention to improve the initial activity of hydrazine solutions, which are activated with complexes of trivalent cobalt, with respect to oxygen dissolved in water, and to lower the activator concentration; the object of the invention being to use a suitable coactivator. The object is accomplished in that the activator-rich hydrazine solution additionally contains 2-amino-4-nitrophenol or 2-acetamino-4-nitrophenol or mixtures thereof as coactivator.