Abstract: A liquid injection type screw compressor in which, in a compression stroke of an working space formed by male and female rotors, liquids such as oil or water is prevented from leaking from the high pressure working space to a gas inlet side, suction resistance of gas sucked from the gas inlet to a rotor casing is reduced to improve volumetric efficiency, and shape forming of the casing is simplified. The liquid injection screw compressor has the male and female rotor pair of screw rotors, the rotor casing (1a, 1b) having a bore for receiving the rotors, a gas suction opening and a gas outlet that are provided in both end sections of the casing and communicate with the bore, and a lip section (4) projected from a bore surface (2) positioned more on the upstream side than a suction seal line (5) of the casing in order to prevent a back flow of the liquid from the bore surface toward the gas inlet side.

Abstract: The construction machine according to the present invention comprises a lower running body, an upper turning body mounted free to turn on the lower running body, and a connecting bracket arranged between the rear end of a turning frame of the upper turning body and a rear device arranged on the rear end side, characterized in that the connecting bracket is provided with a connecting portion connected detachably to the rear end of the turning frame, and a mounting portion for detachably mounting the rear device such as a counterweight elevating device. Thereby, the construction machine can be applied to multi-purpose uses while using the frame construction in common.

Abstract: A micro-array for analysis of DNA is prepared by the steps of spotting onto a solid carrier in its predetermined area in which plural reactive groups are fixed an aqueous solution which contains a thickening agent and probe molecules (e.g., DNA fragments) having a group reactive with the reactive group of the solid carrier to produce covalent bonding; spotting onto the solid carrier in a different area having the same reactive groups an aqueous solution (same or different); incubating the aqueous solution-spotted solid carrier to produce the covalent bondings; and washing the solid carrier with an aqueous medium to remove the thickening agent from the solid carrier. An electrostatic bonding can be utilized in place of the covalent bonding.

Abstract: A DNA chip favorably employable for detecting a DNA fragment complementary to the oligo- or polynucleotide fixed to the chip is composed of a solid carrier and oligonucleotide or polynucleotide which is fixed to the carrier in the presence of a hydrophilic polymer.

Abstract: The construction machine according to the present invention comprises a lower running body, an upper turning body mounted free to turn on the lower running body, and a connecting bracket arranged between the rear end of a turning frame of the upper turning body and a rear device arranged on the rear end side, characterized in that the connecting bracket is provided with a connecting portion connected detachably to the rear end of the turning frame, and a mounting portion for detachably mounting the rear device such as a counterweight elevating device. Thereby, the construction machine can be applied to multi-purpose uses while using the frame construction in common.

Abstract: A DNA chip favorably employable for detecting a DNA fragment complementary to the oligo- or polynucleotide fixed to the chip is composed of a solid carrier and oligonucleotide or polynucleotide which is fixed to the carrier in the presence of a hydrophilic polymer.

Abstract: A micro-array for analysis of DNA is prepared by the steps of spotting onto a solid carrier in its predetermined area in which plural reactive groups are fixed an aqueous solution which contains a thickening agent and probe molecules (e.g., DNA fragments) having a group reactive with the reactive group of the solid carrier to produce covalent bonding; spotting onto the solid carrier in a different area having the same reactive groups an aqueous solution (same or different); incubating the aqueous solution-spotted solid carrier to produce the covalent bondings; and washing the solid carrier with an aqueous medium to remove the thickening agent from the solid carrier. An electrostatic bonding can be utilized in place of the covalent bonding.