Abstract: There is disclosed an absorption machine comprising at least a first and a second compartment in fluid connection with each other, wherein the first compartment comprises at least one salt selected from the group consisting of LiBr, Lil, LiCl, Nal, and NH4I and wherein at least the first compartment comprises NH3 in an amount sufficient to form a liquid together with the at least one salt in the first compartment. Advantages of using the new mixture include that an absorption machine using a salt and NH3 can be made smaller and lighter with the same power. Further ?T can be improved. The vapour pressure of NH3 in the system can be kept relatively high.

Abstract: A chemical heat pump includes a reactor part (1) that contains an active substance and an evaporator/condenser part (3) that contains that portion of volatile liquid that exists in a condensed state and can be absorbed by the active substance. A channel (4) interconnects the reactor part and the evaporator/condenser part. To heat the reactor part, a portion of this wall is arranged as a solar energy collector, which can result in a very compact structure. In at least the reactor part a matrix (13) is provided for the active substance so that the active substance both in its solid state and its liquid state or its solution phase is held or carried by or bonded to the matrix. The matrix is advantageously an inert material such as aluminium oxide and has pores, which are permeable for the volatile liquid and in which the active substance is located. In particular, a material can be used that has a surface or surfaces, at which the active substance can be bonded in its liquid state thereof.

Abstract: A chemical heat pump includes a reactor part (1) that contains an active substance and an evaporator/condenser part (3) that contains that portion of volatile liquid that exists in a condensed state and can be absorbed by the active substance. A channel (4) interconnects the reactor part and the evaporator/condenser part, In at least the reactor part a matrix (13) is provided for the active substance so that the active substance both in its solid state and its liquid state or its solution phase is held or carried by or bonded to the matrix. The matrix is advantageously an inert material such as aluminum oxide and has pores, which are permeable for the volatile liquid and in which the active substance is located. In particular, a material can be used that has a surface or surfaces, at which the active substance can be bonded in the liquid state thereof. For example, the matrix can be a material comprising separate particles such as a powder or a compressed fiber material.

Abstract: A chemical heat pump includes a reactor part (1) that contains an active substance and an evaporator/condenser part (3) that contains that portion of volatile liquid that exists in a condensed state and can be absorbed by the active substance. A channel (4) interconnects the reactor part and the evaporator/condenser part. To heat the reactor part, a portion of this wall is arranged as a solar energy collector, which can result in a very compact structure. In at least the reactor part a matrix (13) is provided for the active substance so that the active substance both in its solid state and its liquid state or its solution phase is held or carried by or bonded to the matrix. The matrix is advantageously an inert material such as aluminium oxide and has pores, which are permeable for the volatile liquid and in which the active substance is located. In particular, a material can be used that has a surface or surfaces, at which the active substance can be bonded in its liquid state thereof.

Abstract: An installation for storing and/or transporting energy comprises a charging station, a discharging station and a reactor part (1). The reactor part is designed to be part of a chemical heat pump and contains an active substance. It is also arranged to be capable of being connected to the charging station for charging, i.e. transfer of the active substance to a charged state, and to the discharging station for discharging, i.e. transfer of the active substance to a discharged state. In the reactor part a matrix for the active substance can in one embodiment be provided, so that the active substance both in its solid and its liquid state is held or carried or bonded by the matrix. The matrix is advantageously an inert material such as aluminium oxide and has pores, which are permeable for the volatile liquid and in which the active substance is located. In particular, a material can be used that has a surface or surfaces, at which the active substance can be bonded in the liquid state thereof.

Abstract: A chemical heal pump includes a reactor part (1) that contains an active substance and an evaporator/condenser part (3) that contains that portion of volatile liquid that exists in a condensed state and can be absorbed by the active substance. A channel (4) interconnects the reactor part and the evaporator/condenser part, In at least the reactor part a matrix (13) is provided for the active substance so that the active substance both in its solid state and its liquid state or its solution phase is hold or carried by or bonded to the matrix. The matrix is advantageously an inert material such as aluminium oxide and has pores, which are permeable for the volatile liquid and in which the active substance is located. In particular, a material can be used that has a surface or surfaces, at which the active substance can be bonded in the liquid state thereof. For example, the matrix can be a material comprising separate particles such as a powder or a compressed fibre material.

Abstract: A capacitive vacuum measuring cell includes first and second ceramic housing bodies (1, 4) joined by an edge seal (3). A thin ceramic membrane (2) is supported between first and second housing bodies (1, 4) by the edge seal (3) at a small distance from the first housing body (1) creating a reference vacuum chamber (25) therebetween. An electrically conductive material (7) coats opposing surfaces of the first housing body (1) and the membrane (2) to form a capacitor. A measurement vacuum chamber (26) is provided between the membrane (2) and the second housing body (4). A port (5) communicates with the second housing body (4) to connect the measurement vacuum chamber (26) of the measuring cell to the medium to be measured. The membrane (2) is made from an Al2O3 slurry that is sintered in a first heating step, cooled, and then reheated to smooth the membrane.

Abstract: A capacitive vacuum measuring cell includes first and second ceramic housing bodies (1, 4) joined by an edge seal (3). A thin ceramic membrane (2) is supported between first and second housing bodies (1, 4) by the edge seal (3) at a small distance from the first housing body (1) creating a reference vacuum chamber (25) therebetween. An electrically conductive material (7) coats opposing surfaces of the first housing body (1) and the membrane (2) to form a capacitor. A measurement vacuum chamber (26) is provided between the membrane (2) and the second housing body (4). A port (5) communicates with the second housing body (4) to connect the measurement vacuum chamber (26) of the measuring cell to the medium to be measured. The membrane (2) is made from an Al2O3 slurry that is sintered in a first heating step, cooled, and then reheated to smooth the membrane.

Abstract: In a chemical heat pump a substance is used which within the temperature range for which the heat pump is intended has a transition between a solid phase and a solution phase. The substance can for a solar driven chemical heat pump comprise magnesium chloride hexahdrate. In an accumulator part of the heat pump a heat exchanger (21) is provided enclosed by a net (23). The solid phase is primary located inside the net in contact with the heat exchanger while the solution phase flow out of the net and is collected in space (24′) below the heat exchanger. From this space the solution phase is pumped and sprayed over the heat exchanger from a spray bar (25). Thereby, all the time equilibrium is maintained. The advantage including the constant temperature step and the relatively large energy content of solid substance is thereby combined with the high power of liquid substances.

Abstract: A capacitive vacuum measuring cell includes first and second ceramic housing bodies (1, 4) joined by an edge seal (3). A thin ceramic membrane (2) is supported between first and second housing bodies (1, 4) by the edge seal (3) at a small distance from the first housing body (1) creating a reference vacuum chamber (25) therebetween. An electrically conductive material (7) coats opposing surfaces of the first housing body (1) and the membrane (2) to form a capacitor. A measurement vacuum chamber (26) is provided between the membrane (2) and the second housing body (4). A port (5) communicates with the second housing body (4) to connect the measurement vacuum chamber (26) of the measuring cell to the medium to be measured. The membrane (2) is made from an Al2O3 slurry that is sintered in a first heating step, cooled, and then reheated to smooth the membrane.

Abstract: In a chemical heat pump a substance is used which in an efficient way interacts with a volatile liquid such as water. The substance is selected considering among other things the magnitude of its &Dgr;T and its energy content so that the heat pump becomes suited for converting low grade heat energy such as solar energy to cooling for airconditioning and also for a simultaneous production of heat for example for use as hot tap water in houses. The heat pump can also be used in a refrigerating box. Suitable substances comprise barium hydroxide, lithium hydroxide, strontium bromide and cobalt chloride. The substance is applied as a layer (23) on the surface of a heat conducting wall (22) by applying a slurry-like mixture of the substance with the liquid when being vibrated to the wall between heat conducting flanges 25). The mixture is dried under a vacuum and is heated and is simultaneously compressed by applying an exterior pressing force.

Abstract: A method for electronic compensation of erroneous readings is based on the observation that a sensor serving as a transducer is caused to resonate. The erroneous reading caused by the resonance is measured and a compensation signal is feedback into the measurement element, the signal being essentially unfiltered. An apparatus uses error detection and compensation circuits whose upper barrier frequency are above the resonance frequency of the transducer for detecting an error signal caused by resonance in the transducer and for generating a compensation signal for feeding into the detector sensor.

Abstract: Adenosine and xanthine deriviatives, and compositions comprising those compounds, are potent selective agonists of adenosine receptors. The derivatives and compositions are used to treat conditions, including certain cardiac arrhythmias.

Abstract: N.sup.6 -(epoxynorborn-2-yl)adenosines are Al adenosine receptor agonists that are useful for controlling atrial fibrillation, ventricular rate in atrial flutter, supraventricular tachyarrhythmia, inhibiting A--V- nodal transmission in supraventricular tachycardia, and for normalizing ventricular rhythm and hemodynamics.

Abstract: Adenosine and xanthine derivatives, and compositions comprising those compounds, are potent selective agonists and antagonists of adenosine receptors. The derivatives and compositions are used to treat conditions, including certain cardiac arrhythmias.

Abstract: Xanthine derivatives, and compositions comprising those compounds, are potent selective antagonists of adenosine receptors. The derivatives and compositions are used to treat conditions, including certain cardiac arrhythmias. The compounds, specifically, are C-8 epoxide derivatives of xanthine having the general formulae of: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different, and can be H or an alkyl group of 1-4 carbons, and n=0-4; and ##STR2## wherein R.sub.1 and R.sub.2 are the same or different, and can be H or an alkyl group of 1-4 carbons, R.sub.3 is either O or (CH.sub.2).sub.1-4, and n=0-4.

Abstract: Novel compounds and a method of using them to antagonize adenosine receptors are provided wherein the compounds are selected from the group of racemic mixtures or optically active compounds represented by the general formula: ##STR1## wherein R.sub.2 is selected from the group consisting of cycloalkyl radicals having from 3 to 8, preferably 3 to 7, ring carbon atoms, alkyl radicals having from 1 to 10, carbon atoms, aralkyl radicals having from 7 to 14, preferably 7 to 10, carbon atoms, and heteroatom- and halogen-substituted derivatives thereof wherein said heteroatom may be selected from the group consisting of nitrogen, phosphorus, sulfur and oxygen; R.sub.1 may be hydrogen or R.sub.2, and R.sub.

Abstract: Adenosine and xanthine derivatives, and compositions comprising those compounds, are potent selective agonists and antagonists of adenosine receptors. The derivatives and composition are used to treat conditions, including certain cardiac arrhythmias.

Abstract: Compounds of the formula are disclosed, wherein R1, represents secondary alkyl; aralkyl; cycloalkyl; heteroaryl substituted alkyl; norbornyl; and substituted secondary alkyl, aralkyl, cycloalkyl, heteroaryl substituted alkyl, norbornyl; and para-substituted phenyl groups; and R2 and R3 are hydrogen or pharmacologically acceptable acyl groups. The compounds of the invention are useful as cardiovascular vasodilator or anti-hypertensive agents. The therapeutically useful compounds of the invention as well as similar 5-N and N-6 substituted adenosine 5-uronamides are prepared, in accordance with a novel process, from isopropylidene (or otherwise suitably blocked) inosine-5′-uronic acid. Isopropylideneinosine-5′-uronic acid is reacted with a suitable inorganic acid halide, such as thionyl chloride, to yield 6-halogeno-9-[2′,3′-O-isopropylidene-&bgr;-D-ribofuranosyl-5-uronic acid halide]-9H-purine.

Abstract: Compounds are disclosed having the formulae: ##STR1## .Iadd.wherein R' is hydrogen, lower alkyl or lower alkoxy; r is 0 or 1 and p is zero to four; and .Iaddend.wherein R.sub.1 is selected from the group, consisting of radicals represented by the general formulae: ##STR2## wherein Y is selected from the group consisting of lower alkyl, lower alkoxy, and halogen; Z is oxygen, sulfur or --NH, Q is --CH or nitrogen; a is zero or an integer of from one to three; andwherein, R.sub.2 is selected from the group consisting of hydrogen and straight chain, branched and cyclic hydrocarbyl radicals having from one to four carbon atoms, and optionally substituted with a hydroxyl radical; andwherein X is two hydrogen atoms or oxygen and B is selected from oxygen and nitrogen, and pharmaceutically acceptable salts thereof, with the proviso that when X is two hydrogen atoms, B is oxygen, and with the further proviso that when B is oxygen then R.sub.1 cannot be a phenyl or a substituted phenyl radical.