摘要:
Polymer-based polyvalent malonic acid derivatives having anti-adhesive properties are described. The compounds comprise a polyamino acid linked to a group of formula (I). In formula (I), R.sup.1 and R.sup.2 together form a six-membered carbocylic or heterocyclic ring, containing at least one substituent selected from R.sup.4, R.sup.5, and R.sup.6. R.sup.3 is H, (CH.sub.2) .sub.m X or CH.sub.2 O(CH.sub.2).sup.m X.sup.1. The polyamino acid and the group of formula II are linked via R.sup.4, R.sup.5, or R.sup.6, or optionally via a spacer of formula --�Q.sup.1 --(CH.sub.2).sub.p --Q.sup.2 --!.sub.r. A and B independently are O, S, NH, HN--CO, OC--NH, O--CO, OC--O, NH--CO--O, --O--CO--NH, S--CO, SC--O, O--CS--S, S--CS--OS, NH--CS--S, S--CS--NH, or CH.sub.2. Z is a pyranose, furanose, open-chain polyalcohol or Y--X.sup.6. Y is --O--(CX.sup.2,X.sup.3).sub.n, -(CX.sup.2,X.sup.3).sub.n, --CH.sub.2 --(CX.sup.2,X.sup.3).sub.n or a saturated or unsaturated six-membered carbo- or heterocyclic group having at least one substituent R.sup.9, or a combination of the chain --O--(CX.sup.2,X.sup.3).sub.n, or -(CX.sup.2,X.sup.3).sub.n, and the carbocyclic or heterocyclic group, in which R.sup.4, R.sup.5, and R.sup.6 independently are H, OH, --O--(CH.sub.2) .sub.q X.sup.4, --CH.sub.2 O(CH.sub.2) .sub.q X.sup.5, or HNC(O)CH.sub.3, and X, X.sup.1, X.sup.2, and X.sup.3 independently are H, NH.sub.2, COOH, OH, CH.sub.2 OH, CH.sub.2 NH.sub.2, C.sub.1 -C.sub.20 -alkyl, or C.sub.6 -C.sub.10 -aryl, X.sup.4 and X.sup.5 independently are --NH-- or --O--, and X.sup.6 is OH or --C(R.sup.3) (COOH).sub.2. m, n, and q independently can be 1-20. In the linker, Q.sup.1 is CH.sub.2 or --CO--, Q.sup.2 is --NH-- or --CO--NH--, p is 1-6, and r is 0 or 1. Methods of preparing the compounds, and their use as medicaments or diagnostic agents also are disclosed. ##STR1##
摘要:
The present invention comprises a new catalyst for the production of polyesters consisting essentially of a finely dispersed, large surface area titanium compound selected from hydrated TiO.sub.2 obtained by hydrolysis and having the composition yTiO.sub.2.zH.sub.2 O and from titanates having the composition (Me.sub.n O).sub.x.(TiO.sub.2).sub.y.(H.sub.2 O).sub.z, wherein Me is an alkaline earth metal or alkali metal. In addition, the present method comprises a process for the production of polyesters using this catalyst as an esterification or transesterification catalyst and as a polycondensation catalyst, whereby a phosphorous-oxygen-compound is added immediately before, during, or after the polycondensation.
摘要:
In the production of .alpha.-sulfofatty acid alkyl ester alkali metal salt pastes by reaction of fatty acid alkyl esters with gaseous SO.sub.3, subsequent after-reaction in liquid phase and neutralization with aqueous alkali metal hydroxide solutions, the crude sulfonation product is fed to an at least two-stage cascade of stirred tanks equipped with heating and cooling systems in which it is subjected with mechanical agitation to a temperature-controlled after-reaction until a degree of sulfonation of at least 90% is reached, after which the aged sulfonation product is further processed in known manner to .alpha.-sulfofatty acid alkyl ester alkali metal salt pastes.
摘要:
A solid, rapidly absorbable composition by weight consisting of 1 part by weight of nimodipine, 0.01 to 1.5 parts of polyvinylpyrrolidone with an average molecular weight of 15,000 to 50,000 and 1 to 12 parts by weight of crosslinked insoluble polyvinylpyrrolidone.
摘要:
A novel dosage form for drug active agents, reagents or other active agents comprising a film-like carrier material having an active agent-containing coating one side thereof and wherein the carrier material is in the form of a release paper, film or foil, and the active agent-containing coating is removed in a dosewise manner from the carrier material after subdivision into dosage units. The removed active agent-containing portions are suitable as oral drugs, pharmaceuticals, reagents or foodstuff.
摘要:
The invention is directed to a circuit arrangement for evaluating the signals of an inductive sensor such as the kind utilized on internal combustion engines. The coil of the inductive sensor is connected via a coupling capacitor to a differential amplifier connected in the form of a comparator. The coil of the sensor is also connected via the coupling capacitor to a resistance for equalizing charge as well as to a peak-value detector. The peak-value detector is connected to the input of the comparator either directly or via an amplifier circuit and effects a threshold adjustment for the comparator which occurs in dependence upon the signal supplied by the inductive sensor and in dependence upon the rotational speed. Manufacturing variations of the inductive sensor as well as temperature changes have no influence on the output signal.
摘要:
Control circuit for arc welding components to workpieces, in which a component is placed on to a workpiece by a weld gun and after a welding stroke is lifted from the workpiece in a return stroke by igniting a pre-current arc and is brought up to the workpiece again in a forward stroke during the burning of an interconnected welding arc, in which a sequencing control determines the tripping moments of return stroke and forward stroke as well as of the welding arc and a monitoring voltage is bypassed from the pre-current arc ignited at the welding point, characterized in that the monitoring voltage (V) is converted into a correction voltage (line 27) by means of a set-point comparator (25) and is superposed on a control voltage (line 18) for principally controlling a high-frequency modulated switching mode power supply unit (15) and said switching mode power supply unit (15), in accordance with the thus corrected control voltage, adjusts its output current (lines 13,14) during the respective welding operation to the resistance value of the pre-current arc established by the monitoring voltage (V) representing the respective welding data.
摘要:
A solid medicament formulation comprising 1 part by weight of crystalline nitrendipine, 0.5-1 part by weight of polyvinylpyrrolidone, 0.05-0.5 part by weight of sodium lauryl-sulphate, 1-6 parts by weight of corn starch, 0.5-4 parts by weight of microcrystalline cellulose, 0-5 parts by weight of lactose and 0.01-0.05 parts by weight of magnesium stearate. Such small size formulation has a high bioavailability.
摘要:
A tunable active high-pass filter particularly for use in hearing aids, which comprises merely a transistor as the active amplifying element. Three series-connected capacitors are connected between the input of the filter and the base of the transistor. A first resistor branches off from the junction between the first and second capacitors, a second resistor branches off from the junction between the second and third capacitors, and both resistors are connected, via a third resistor which is adjustable, to the emitter of the transistor which constitutes the output of the filter. A further resistor extends from the junction between the third capacitor and the transistor base to the source of operating potential which, for example, is positive. Preferably, each of the capacitors forms a high-pass filter with its respectively connected resistor with the first and second resistors, i.e. the resistors of the first and second high-pass filters, being located in the positive feedback path between the emitter of the transistor and its base. By the adjustment of only the value of the adjustable resistor, the steepness or slope of the filter can be varied within wide limits.
摘要:
Certain example embodiments relate to a method of monitoring a message object sent from a client to invoke an operation on a server in a distributed computing environment. Upon receipt of the message object at a measurement point, measurement data is produced. The measurement data is inserted into the message object.