Abstract: The invention relates to a method and a device for the isolation and purification of nucleic acids. According to the invention, after decomposition of a sample the nucleic acids present in said sample are isolated and purified.

Abstract: A tryptophan producing strain of microorganism is selected from E. coli and Corynebacteria and is tryptophan feedback resistant and serine feedback resistant. The serine feedback resistance is by a mutation in a serA allele, where the mutated serA allele codes for a protein which has a Ki value for serine between 0.1 mM and 50 mM. The tryptophan feedback resistance is by a trpE allele which codes for a protein which has a Ki value for tryptophan between 0.1 mM and 20 mM. A process for preparing this microorganism and a process for using this microorganism are disclosed.

Abstract: A temperature-dependent switch has two connection electrodes mounted on an insulating support as well as a switching mechanism that, as a function of its temperature, creates an electrically conductive connection between the two connection electrodes. Also provided is a resistance element that is connected to the two connection electrodes electrically parallel to the switching mechanism and is inserted into the insulating support perpendicular to the connection electrodes, so that it sits inside the insulating support and is retained by it.

Abstract: A mat incorporating a heating wire and intended for installation in a motor vehicle seat for heating the motor vehicle seat. The novel mat includes further antennas or antenna components of an antenna system, which cooperates with a resonator/transponder of a child seat. The mat thus forms a part of a system for detecting the presence of a child seat placed on the motor vehicle seat.

Abstract: Moving paper webs are treated by having a cross-groove or crease pressed into them prior to being transversely cut and folded. The cross-groove or crease is produced by a radially vibrating, rail-like pressure tool that cooperates with a counter-pressure tool. These tools cooperate to form a sharp, folded crease, even in thick products. The crease is formed along the to be formed cross fold line.

Abstract: The present invention relates to a method and apparatus for applying laser induced incandescence (LII) to determine a primary particle size of submicron sized particles. The present invention has found that in addition to volume fraction information, particle size can be determined using LII due to the fact that transient cooling is dependent on the diameter of the particle. The ratio of a prompt and a second time integrated measurement from the same laser pulse has been found to be a function of the particle size. A modeling process involves a solution of the differential equations describing the heat/energy transfer of the particle and surrounding gas, including parameters to describe vaporization, heat transfer to the medium, particle heating etc. The solution gives temperature and diameter values for the particles over time. These values are then converted to radiation values using Planck's equation.

Abstract: Red decorations on substrates which can undergo decorative baking, such as glass, porcelain, ceramic and metal, can be produced using nanoporous aluminium oxide membranes according to the invention, the nanopores of which contain ligand-stabilized gold clusters. The membrane is applied to the substrate followed by baking, resulting in formation of the red color. Alternatively, the membrane can be converted into a red membrane by thermolysis, after which the membrane is employed for production of the decoration. The membranes according to the invention can be obtained by bringing a nanoporous Al2O3 membrane into contact with a solution of a ligand-stabilized gold cluster, in particular one of the formula Au55L12X6, wherein L is a phosphane ligand and X is an anion.

Abstract: The invention relates to a housing for an electric or an electronic component, in particular a motor vehicle control unit, for which the housing parts or housing connections are designed such that the electric or electronic components are sealed watertight and airtight. Such housings, which are composed if only in part of a thermoplastic synthetic material, are provided with a pressure compensation feature. As a result, the pressure inside the housing is constantly adapted to the outside pressure. With this type of pressure adaptation, it is not possible for gases, particularly water vapor, to permeate the synthetic housing under pressure and reach the electric or electronic components. As a result, damage caused by humidity is greatly reduced and the service life is increased.

Abstract: A self-winding cable reel having a base plate which receives the cable drum on a bearing spindle. The technical problem is a stable and concentrated construction of all the functional parts on a base plate and a contact arrangement comprising a small number of individual parts.

Abstract: Particularly smudge-resistant ink jet images are produced with an ink jet recording material which comprises a support, at least one layer applied to the support and an agent which binds ink jet dyes in a spread- and smudge-resistant manner, wherein the agent exhibits a concentration gradient such that the further is the agent from the support, the lower is the concentration.

Abstract: Thermoplastic molding masses made of thermoplastic polymers obtained by mixed graft polymerization and having a glass transition temperature above 20 C., and of special rubber-elastic block copolymers, are characterized by a balanced spectrum of properties.

Abstract: A particulate polymer P having an average particle diameter d50 of from 0.1 to 50 &mgr;m is prepared by a process in which an emulsion E is prepared from one or more monomers M, which are polymerizable by free radical polymerization to give the polymer P, water, and at least one protective colloid PC by the action of high shear forces, and the emulsion E is subjected to polymerization in a reactor with the use of a free radical polymerization initiator RI wherein, based on the emulsion E, not more than 75% by weight of the emulsion E (initially taken portion of E) are initially taken in the reactor at the beginning of the polymerization and at least 25% by weight of the emulsion E (feed portion of E) are not fed to the reactor until after the beginning of the polymerization.

Abstract: For an automatic transmission a starter interlock system is proposed in which an electric position switch (2) and a starter switch (3) are located within the transmission. By moving the ignition key from the zero position to the position I, an electronic transmission controls system (1) is activated, which supplies the position switch (2) and the starter switch (3) with current.

Abstract: The present invention relates to a solid oral anticariogenic composition in the form of a sucking tablet for cleaning the oral cavity and the teeth, and to a process for producing such composition.

Abstract: A method for operation of a direct-injection spark-ignition internal combustion engine operated over large areas of the characteristics map with stratified charge by way of fuel injection during the compression stroke. In order to guarantee reliable mixture ignition and combustion, the method of the present invention provides an ignition system which generates alternating voltage so that high voltage rapidly builds up between the electrodes of a spark plug, and generates ignition sparks with a spark duration that can be defined as a function of operating point.

Abstract: A method of fabricating the composite metal-and-plastic components of an antiballistic grill for an armored vehicle. Each component comprises a core in the form of a length of structural section with layers of plastic against each side bonded to the core by heat and pressure in a mold comprising two halves. The object of the present invention is simpler and more economical lamination in the fabrication of non-flat work with a metal core. The core is electrically heated to a prescribed processing temperature by regulating a current of electricity, whereby the resulting heat is employed to soften to a prescribed extent adhesive between the core and the layers of plastic to be bonded to it.

Abstract: A process for the preparation of carbonates containing aromatic ester groups is disclosed. The process entails reacting aromatic monohydroxy componds with phosgene or with chlorocarbonic acid esters of aromatic monohydroxy compounds at a temperature of 50 to 350° C. and in the presence of active carbon as catalyst.

Abstract: 3,7-Dimethyl-2,6-octadien-1-al of formula I is prepared continuously by: thermally cleaving, in the presence or absence of an acid catalyst, 3-methyl-2-buten-1-al diprenyl acetal of formula II: thereby eliminating 3-methyl-2-buten-1-ol of formula III and yielding cis/trans-prenyl 3-methylbutadienyl ether of formula IV: thermally rearranging the resultant butadienyl ether of formula IV thereby yielding 2,4,4-trimethyl-3-formyl-1,5-hexadiene of formula V: subsequently rearranging intermediate (V) thereby yielding citral product of formula I, which comprises: as the reaction proceeds, continuously distilling the reaction mixture thereby continuously removing prenol, which is formed by degradation of acetal II, and the intermediates of formula IV and V and any citral product which is formed during the reaction; and thermally rearranging said intermediates of formula IV and V at a temperature of 100-200° C.

Abstract: Methods of permanent shaping and volumizing hair that are gentle and prevent overcurling are described. In one method using curlers to curl the hair, an alkaline permanent shaping composition having a pH of 7.6 to 11 and including a hair keratin-reducing substance is applied to the hair and allowed to act on the hair for 5 to 30 minutes at room temperature or for 2 to 20 minutes at an elevated temperature. Then the hair is optionally rinsed with water and subsequently with an acidic aqueous intermediate rinse, which has a pH of 2 to 6.5 and includes an aliphatic organic acid. Next the hair is wound onto curlers, after which the hair is allowed to rest for 30 minutes at room temperature or 20 minutes at an elevated temperature. After the resting period the hair is treated with an oxidant-based fixative, which can be a solution of hydrogen peroxide, and the curlers are removed. The hair is subsequently rinsed with water or washed with a shampoo to remove the fixative and combed into a hair style.