Abstract: An inverter with galvanic separation including a resonant converter and an upstream mounted boost chopper is intended to provide galvanic separation in the context of a variable input and output voltage as it exists in photovoltaic systems, with the efficiency being intended to be optimized over the entire input voltage range. This is achieved in that a boost chopper or a buck chopper is mounted upstream of the resonant converter.

Abstract: The disclosure relates to a method for operating a DC-to-DC converter with two bridge arrangements with bridge switches, of which at least one is in the form of a switchable bridge arrangement which may be operated either as a full bridge or as a half bridge. The converter further includes a series resonant circuit, wherein the first and second bridge arrangements are coupled to one another via the series resonant circuit. At least one switchable bridge arrangement is operated as a full bridge in at least one time segment and as a half bridge in at least one further time segment within a half-period of a periodic switching of the bridge switches. The disclosure furthermore relates to a DC-to-DC converter and an inverter and a power generation installation including such a DC-to-DC converter.

Abstract: Agent for treating keratin-containing fibers, particularly human hair, comprising, in a cosmetically acceptable carrier, (a) at least one nonionic starch modified with propylene oxide, and (b) at least one additional nonionic film-forming and/or nonionic setting polymer containing at least one structural unit chosen from the structural units of formulae (M1) to (M6), wherein R is a hydrogen atom or a methyl group, R? is a hydrogen atom or a (C1 to C4) acyl group, R? and R?? are, mutually independently, a (C1 to C7) alkyl group or a hydrogen atom, R?? is a linear or branched (C1 to C4) alkyl group or a (C2 to C4) hydroxyalkyl group; use of the agents for temporary deformation of hair and for hair care, particularly as an aerosol hair spray or aerosol hair foam.

Abstract: Agent for treating fibers containing keratin, particularly human hair, comprising, in a cosmetically acceptable carrier: (a) at least one amphiphilic, cationic polymer having at least one structural unit of formulae (I) to (IV), wherein; R1 and R4 are independently hydrogen or a methyl group, X1 and X2 are independently oxygen or an NH group, A1 and A2 are independently an ethane-1,2-diyl, propane-1,3-diyl or butane-1,4-diyl group, R2, R3, R5 and R6 are independently a (C1 to C4)-alkyl group, R7 is a C8 to C30)-alkyl group and; (b) at least one film-forming cationic and/or stabilizing cationic polymer. The invention also relates to use of agents for temporarily styling hair and for haircare, particularly as an aerosol hairspray or mousse.

Abstract: An aerosol composition includes at least one setting active substance, and at least one propellant having at least one compound having 3 to 10 carbon atoms in accordance with formula (I), in which the residues R1, R2, R3, and R4 signify, mutually independently, a hydrogen atom, a bromine atom, a fluorine atom, or a (C1 to C6) alkyl group substituted with at least one fluorine atom, or two of the residues R1, R2, R3, and R4 form a five- or six-membered ring, with the provision that: at least one of the residues R1, R2, R3, or R4 denotes a hydrogen atom or a fluorine atom, and at least one of the residues R1, R2, R3, or R4 denotes a (C1 to C6) alkyl group substituted with at least one fluorine atom, or at least two of the residues R1, R2, R3, and R4 form a five- or six-membered ring.

Abstract: The present invention relates to a method of using N-acylamino acids or salts thereof to protect metal from corrosion, and to containers that at least in portions enclose a cavity, where the container comprises at least one metallic part and where a composition that encompasses at least one N-acylamino acid and water is arranged in the cavity.

Abstract: A circuitry includes first, second, and third switching elements, first and second storage inductors, two connector pairs, and first and second intermediate potential points. The second storage inductor includes first and second windings. The first intermediate potential point is connected to a first connector of the first connector pair via the first storage inductor, to the second connector of the first connector pair via the third switching element, and to the second intermediate potential point. The second intermediate potential point is connected to the first connector of the second connector pair via a series connection of the first switching element and the first winding of the second storage inductor, and to the second connector of the second connector pair via a series connection of the second switching element and the second winding of the second storage inductor.

Abstract: Agent for treating fibers containing keratin, particularly human hair, comprising, in a cosmetically acceptable carrier: (a) at least one amphiphilic, cationic polymer having at least one structural unit of formulae (I) to (IV), wherein; R1 and R4 are independently hydrogen or a methyl group, X1 and X2 are independently oxygen or an NH group, A1 and A2 are independently an ethane-1,2-diyl, propane-1,3-diyl or butane-1,4-diyl group, R2, R3, R5 and R6 are independently a (C1 to C4)-alkyl group, R7 is a C8 to C30)-alkyl group and; (b) at least one film-forming cationic and/or stabilizing cationic polymer. The invention also relates to use of agents for temporarily styling hair and for haircare, particularly as an aerosol hairspray or mousse.

Abstract: Agents for treating keratin-containing fibers, particularly human hair, containing in a cosmetically acceptable carrier (a) at least one amphiphilic, cationic polymer having at least one structural unit of formula (I), at least one structural unit of formula (II) and at least one structural unit of formula (III), wherein R1 and R4 are independently a hydrogen atom or a methyl group, X1 and X2 are independently an oxygen atom or an NH group, A1 and A2 are independently an ethane-1,2-diyl, propane-1,3-diyl or butane-1,4-diyl group, R2, R3, R5 and R6 are independently a (C1 to C4) alkyl group, R7 is a (C8 to C30) alkyl group, and (b) at least one cationic polymer having at least one structural unit of formula (I), at least one structural unit of formula (V) and at least one structural unit of formula (VI) and use of those agents for temporarily shaping hair and for hair care.

Abstract: Agents for treating keratin-containing fibers, particularly human hair, containing in a cosmetically acceptable carrier (a) at least one cationic polymer having at least one structural unit of formula (I), at least one structural unit of formula (II), and at least one structural unit of formula (III), and (b) at least one cationic surfactant of formula (IV), wherein x and y are independently an integer number greater than 0, R is a (C8 to C20) alkyl group or a (C8 to C20) alkenyl group, R? is a *—(CH2CH2O)zH group wherein z is an integer number greater than 0, a (C8 to C20) alkyl group or a (C8 to C20) alkenyl group, and X? is a physiologically acceptable anion. The agents are gentle and can be used as hair care agents having outstanding styling properties, particularly in the form of an aerosol hair spray or aerosol hair foam.

Abstract: Cosmetic products for treating keratin fibers, especially human hair, containing, in a cosmetic carrier, at least one starch compound, at least 0.01% by weight of a (C8 to C20) monocarboxylic acid compound of formula (I), wherein R is a (C7 to C19) alkyl group, Mn+ is a cation of n valency and n is 1, 2 or 3 (especially 2), and at least one blowing agent, wherein the products can be dispensed from an aerosol container without the valve excessively clogging up or being blocked.

Abstract: Cosmetic agents for the temporary deformation of keratinic fibers which contain, in a cosmetic carrier, a combination of at least one chitosan compound and at least one nonionic starch modified by means of propylene oxide, produce a hairstyle with a high degree of hold, excellent flexibility, and good hair care.

Abstract: Agent for treating keratin-containing fibers, particularly human hair, comprising, in a cosmetically acceptable carrier, (a) at least one nonionic starch modified with propylene oxide, and (b) at least one cationic film-forming and/or cationic setting polymer; use of the agents for temporary deformation of hair and for hair care, particularly as an aerosol hair spray or aerosol hair foam.

Abstract: An agent for treating keratin-containing fibers, in particular human hair, containing, in a cosmetically acceptable carrier, (a) at least one nonionic starch modified by means of propylene oxides, and (b) at least one anionic film-forming and/or anionic setting polymer, encompassing at least one structural unit of formula (I) and at least one structural unit of formula (II), in which R8, R9, R10, R11, and A3 are as defined in claim 1; use of the agents for the temporary deformation of hair and for hair care, in particular as an aerosol hair spray or

Abstract: Agent for treating keratin-containing fibers, particularly human hair, comprising, in a cosmetically acceptable carrier, (a) at least one nonionic starch modified with propylene oxide, and (b) at least one additional nonionic film-forming and/or nonionic setting polymer containing at least one structural unit chosen from the structural units of formulae (M1) to (M6), wherein R is a hydrogen atom or a methyl group, R? is a hydrogen atom or a (C1 to C4) acyl group, R? and R?? are, mutually independently, a (C1 to C7) alkyl group or a hydrogen atom, R?? is a linear or branched (C1 to C4) alkyl group or a (C2 to C4) hydroxyalkyl group; use of the agents for temporary deformation of hair and for hair care, particularly as an aerosol hair spray or aerosol hair foam.

Abstract: The invention is a method and electric circuitry for measuring a grounding current of a photovoltaic power system incorporating a photovoltaic inverter, a measurement current being led through two shunts disposed at different points. The measurement current is a current that may flow alternatively at two different points at different electric potentials, the current flowing at a potential that differs by at least 50 V from the potential of the point of evaluation. The shunts are inserted in such a manner in a current mirror circuit that the voltage drop caused by the measurement in the shunts generates an asymmetry in the current mirror the magnitude of which is proportional to the measurement current. The measurement current is the grounding current of the photovoltaic power system with optional positive or negative pole grounding.

Abstract: The subject matter of the invention is a method of measuring a grounding current of a photovoltaic power system incorporating a photovoltaic inverter, a measurement current being led through two shunts (Rs1, Rs2) disposed at different points, the measurement current being a current that may flow alternatively at two different points at different electric potentials, the current flowing at a potential that differs by at least 50 V from the potential of the point of evaluation, the shunts (Rs1, Rs2) being inserted in such a manner in a current mirror circuit that the voltage drop caused by the measurement in the shunts generates an asymmetry in the current mirror the magnitude of which is proportional to the measurement current, and the measurement current being the grounding current of the photovoltaic power system with optional positive or negative pole grounding.

Abstract: Method for smoothing fibers containing keratin, in particular human hair. Fibers are subjected to a thermal treatment and to a treatment with an agent containing at least one conditioning compound selected from cationic polymers, quaternary ammonium compounds, silicones and protein hydrolyzates. The invention also relates to the use of an agent containing at least one of the conditioning compounds concerned in said method for smoothing fibers containing keratin. The inventive method achieves an excellent, uniform smoothing of the fibers, which are also conditioned.

Abstract: The invention relates to a composition which is oxidatively effective on keratin-containing fibers, in particular human hair, and which, besides at least one oxidizing agent, comprises an active ingredient combination of (a) a selected cationic polymer, (b) at least one mono- or di(C.sub.8- to C.sub.30)-alkylammonium salt and (c) at least one quaternary ammonium compound which carries at least one selected group on the quaternized nitrogen atom, and to a method of reshaping keratin-containing fibers, in which this composition is used, and to the use of this composition for fixing in the course of hair reshaping. The reshaping is improved through these compositions and the fiber receives excellent care and structure retention.

Abstract: The measuring array with an earth connection point (5) for determining the insulation resistance (Riso) of an energized electrical apparatus or of an installation with a supply voltage UB with a positive pole (6) and a negative pole (7), two switches (S1, S2) or a corresponding two-way switch being provided for creating a current path between one of the two poles and said earth connection point (5) in order to determine the insulation resistance (Riso) generally obtained when one or a plurality of insulation faults occur at any potential reference, two measurements being performed one after the other for determining the insulation resistance, the first switch (S1) being closed and the second switch (S2) open during the first of these two measurements and the first switch (S1) being open and the second switch (S2) closed during the second of these measurements.