Abstract: The present invention provides a coolant composition having a glycol as a main component, which prevents iron and aluminum from being corroded, and in particular, has excellent corrosion preventing properties for aluminum and aluminum alloys at high temperatures, and the coolant composition is characterized by containing: (a) 0.1-10% by weight of at least one component selected from among aromatic monobasic acids and the salts thereof; (b) 0.0001-0.1% by weight of at least one component selected from among strontium compounds, magnesium compounds and calcium compounds; and (c) 0.01-1.0% by weight of 2-phosphonobutane-1,2,4-tricarboxylic acid or the salt thereof.

Abstract: Coolant compositions for fuel cells having at least one sugar alcohol in a base component that resist oxidation of the base component and the rise of the electric conductivity of the coolant when the fuel cell is in use. Fuel cells including coolant compositions having at least one sugar alcohol in a base component. Methods of making fuel cells including coolant compositions having at least one sugar alcohol in a base component.

Abstract: The present invention relates to a heat transfer medium composition which contains water, a glycol, alcohol and/or glycol ether as a main ingredient and a pH buffering agent. The composition provides improved and long lasting buffering in actual use to maintain the pH value of the medium within the appropriate range of pH 6 to pH 10. The pH buffering agent is prepared of an alicyclic compound where two members selected from among carboxyl and its salts are bonded to a ring-constituting carbon atom, or at least two members selected from the group are respectively bonded to as many neighboring carbon atoms. Alternatively, the pH buffering agent is prepared of a heterocyclic compound in which at least one ring-constituting carbon atom of the alicyclic compound is substituted by a nitrogen or oxygen atom, where two members selected from the group are bonded to a ring-constituting carbon atom, or at least two members selected from the group are respectively bonded to as many neighboring carbon atoms.

Abstract: The invention relates to a coolant composition which is excellent in hard water stability and has excellent corrosion preventing properties for aluminum and aluminum alloys at high temperatures, and the coolant composition has glycol as a main ingredient and is characterized by comprising (a) 0.01-5% by weight of phosphate; (b) 0.0001-0.1% by weight of strontium compound; and (c) 0.01-0.5% by weight of at least one ingredient selected from the group consisting of polymers and copolymers of C4-C6 unsaturated monoethylene dicarboxylic acid or their salts, polymers and copolymers of C4-C6 unsaturated monoethylene monocarboxylic acid or their salts, and copolymers of the above described C4-C6 unsaturated monoethylene dicarboxylic acid or their salts and C4-C6 unsaturated monoethylene monocarboxylic acid or their salts.

Abstract: The present invention provides a coolant composition having a glycol as a main component, which prevents iron and aluminum from being corroded, and in particular, has excellent corrosion preventing properties for aluminum and aluminum alloys at high temperatures, and the coolant composition is characterized by containing: (a) 0.1-10% by weight of at least one component selected from among aromatic monobasic acids and the salts thereof; (b) 0.0001-0.1% by weight of at least one component selected from among strontium compounds, magnesium compounds and calcium compounds; and (c) 0.01-1.0% by weight of 2-phosphonobutane-1,2,4-tricarboxylic acid or the salt thereof.

Abstract: The present invention provides a coolant composition which has a glycol as a main ingredient, is excellent in stability in a hard water, and has excellent corrosion preventing properties for aluminum and aluminum alloys, and the coolant composition is characterized by comprising: (a) 0.1-10% by weight of at least one ingredient selected from the group consisting of alkyl benzoic acids, aliphatic dicarboxylic acid or their salts; (b) 0.01-2.0% by weight of phosphate; (c) 0.01-0.5% by weight of 2-phophonobutane-1,2,4-tricarboxylic acid or its salt; and (d) 0.01-0.5% by weight of at least one ingredient selected from the group consisting of C4-C6 polymers and copolymers of unsaturated monoethylene dicarboxylic acid or their salts, polymers and copolymers of C4-C6 unsaturated monoethylene monocarboxylic acid or their salts, and copolymers of the above described C4-C6 unsaturated monoethylene dicarboxylic acid and the above described C4-C6 unsaturated monoethylene monocarboxylic acid.

Abstract: A coolant composition for a fuel cell unit, which contains at least one aliphatic alcohol having unsaturated bonds in the molecules having 2 to 20 carbon atoms each. The coolant composition maintains the electrical conductivity of the coolant at 10 ?S/cm or below as well as the fluctuation of the electrical conductivity within the range of 0 to 10 ?S/cm.

Abstract: The present invention relates to a coolant used for cooling a fuel cell and in particular, a fuel cell for a vehicle, and the composition is characterized in using as a basic material one or more materials selected from a group consisting of secondary alcohols, tertiary alcohols, and derivatives of secondary or tertiary alcohols, or a solution thereof, the composition being superior in the low conductivity and anti-freeze properties and capable of maintaining the low conductivity even when used for a long period of time.

Abstract: The present invention is directed to a method of making a medical examination appointment and a system that implements such a method. In such a system, performance data is stored for each instance of examination. Based on the stored performance data, the number of appointments acceptable for each time frame is updated. When an appointment request designating at least one kind of examination is received, one or more time frames is determined which are available to accept the appointment request. In determining one or more time frames, (a) it is also determined if a physician needs to attend the examination, (b) it is also determined if the examinations can be conducted on the same day if more than one kind of examination is designated, and (c) priority among the examinations is determined if more than one kind of examination is designated. Then, the available one or more time frames are presented for selection.

Abstract: The invention relates to a heat transfer medium composition excellent in dispersion stability of metal and/or metal oxide particles and high in thermal conductivity, characterized by comprising water and/or alcohol as the main component, and (a) one kind or two or more kinds selected from metal and/or metal oxide particles having an average particle diameter of from 0.001 to 0.1 ?m, (b) one kind or two or more kinds selected from polycarboxylic acids and/or salts thereof, and (c) at least one kind of a metal corrosion inhibitor.

Abstract: The present invention relates to a coolant composition used for cooling a fuel cell, in particular to a coolant composition used for cooling a fuel cell having low conductivity, anti-freeze properties, and excellent anti-corrosion properties for a metal, especially an aluminum based material, for use in the cooling system of fuel cell and, further, exhibiting no significant increase in conductivity even after long term use. The coolant composition according to the invention is characterized by comprising a base agent and an additive for sustaining low conductivity of the coolant composition, the anti-corrosive additive being such a substance as suppressing oxidation of the basic agent or blocking ions eluting into a cooling system to prevent conductivity of the coolant composition from increasing.

Abstract: The present invention is a fuel cell stack coolant composition, which maintains the electrical conductivity of coolant low and provides self identification by tint. The coolant composition provides those properties even when a cation or anion exchanger is provided where the coolant is used. The coolant composition includes a base material and a dye which maintains the electrical conductivity of coolant at 10 &mgr;S/cm or lower at 25° C. or a dye which can pass through a cation or anion exchanger.

Abstract: The present invention relates to quinoline derivatives of the formula ##STR1## wherein Z is an amino group or a halogen atom, R is ##STR2## in which R.sub.1 is a hydrogen atom, a lower alkyl or haloalkyl group, R.sub.2 is a hydrogen atom or a lower alkyl group, R.sub.3 is a lower alkyl or haloalkyl group, R.sub.4 is a hydrogen atom or a lower alkyl group, R.sub.5 and R.sub.6 are the same or different and each represents a hydrogen atom or a lower alkyl group, or R.sub.5 and R.sub.6, together with the nitrogen atom to which they are attached, form a heterocyclic ring, and n is 0 or 1, with the proviso that when Z is an amino group, R is (B);and esters thereof and salts thereof and processes for preparation thereof. These compounds show excellent antibacterial activity and are useful antibacterial agents.

Abstract: The present invention relates to a quinoline derivative of the formula ##STR1## wherein Z is an amino group or a halogen atom, R.sub.1 is a hydrogen atom or a methyl or ethyl group, R.sub.2 is a hydrogen atom or a methyl or fluoromethyl group, R.sub.3 and R.sub.4 are the same or different and each represents a hydrogen atom or a methyl group, and n is 1 or 2;and esters thereof and salts thereof and processes for preparation thereof. These compounds show excellent antibacterial activity and are useful antibacterial agents.