摘要:
Described is a novel process for the introduction of an organic acyl radical selectively at the nitrogen atom of the amino group of desferrioxamine B or of a partially O-acylated derivative thereof. It comprises treating a derivative of desferrioxamine B, in which the amino nitrogen and the hydroxy oxygen of at least one of the hydroxamic acid groupings carries an organic silyl group, with an organic acylating agent and then removing the silyl groups present. The novel N- and O-silylated starting materials can be manufactured, preferably in situ, by reacting an appropriate derivative of desferrioxamine B that has at least one hydroxy group and the amino group in free form, with an organic silicon halide.
摘要:
A cold gas spray gun is disclosed. The spray gun includes a high-pressure gas heater which has a pressure vessel through which gas flows and a heating element situated in the pressure vessel, as well as a mixing chamber in which particles can be admixed with the gas through a particle feed. A Laval nozzle is arranged downstream in the direction of flow of the gas and consists of a convergent section, a nozzle throat and a divergent section. The high-pressure gas heater and/or the mixing chamber is/are at least partially insulated on the inside in the areas of contact with the gas.
摘要:
The invention relates to an adsorption filter material (1) that provides protection against chemical toxins, chemical weapons and pollutants, with a preferably multi-layer composite construction (2). The layer construction (2) includes at least one planar support layer (3) with two opposing sides (3′, 3″) and an adsorption layer (4), provided on the support layer (3) made from a material which adsorbs chemical toxins, the surface of at least one of the both sides (3′ and/or 3″) of the support layer (3) being modified by plasma treatment. The surface properties, in particular the surface finish and the surface reactivity can be adjusted and optimised to match the application by means of the plasma treatment.
摘要:
The invention relates to a process and a device for high-velocity flame spraying, the spray particles being accelerated in a flame jet of combustion gases. The injection of spray particles according to the invention takes place axially and centrally in the divergent section of the Laval nozzle, the powder tube (2) and the outer nozzle body (1) together forming a Laval nozzle for acceleration of the flame jet.
摘要:
The invention relates to a device for detecting the adjustment of translationally moved adjusting devices in vehicles, especially window lifters, sunroofs and similar, comprising a sensor, which emits a sensor signal that is dependent on the adjusting movement of the adjusting device to a circuit for evaluating the sensor signal. This sensor also detects the forces of acceleration that are exerted on the vehicle and emits a signal to the circuit that corresponds to these forces of acceleration, and is characteristically modified. The sensor signals are the evaluated.
摘要:
An error processing circuit for a receiving location of a system for transferring binary data in the form of pulse sequences, wherein the system has a number of receiving locations connected via a double-line bus having a first line and a second line. The circuit includes a data output, a decoder having three decoder outputs, of which a first decoder output associated with both lines delivers a first decoder output signal dependent on the difference between the potential values of both lines, a second decoder output associated with the first line delivers a second decoder output signal dependent on the difference between the potential value of the first line and a first mean potential value, and a third decoder output associated with the second line delivers a third decoder output signal dependent on the difference between the potential value of the second line and a second mean potential value. A line condition detector circuit detects error-free line conditions, line errors of the first line, and line errors of the second line, depending on the decoder output signals, and changeover control signals can be delivered to a changeover switch to deliver properly decoded data, depending on the particular detection result.
摘要:
A process is for preparing O-acetylserine, L-cysteine and sulphurous compounds derived therefrom using feedback-resistant serine acetyl transferases. In comparison with the wild-type enzyme, these serine acetyl transferases have reduced sensitivity to the inhibitor L-cysteine and a protein sequence which, in comparison with the wild-type enzyme, displays at least one mutation or deletion. The process has a mutation which lies in the sequence region of the amino acid in position 97 up to and including the amino acid in position 273 or the deletion lies in the carboxy terminal sequence region as from the amino acid in position 227, position 1 being the starter methionine of FIG. 5 (SEQ ID NO:1) and the mutation from Met to Ile in position 256 being excluded.
摘要翻译:一种方法是使用反馈抗性丝氨酸乙酰转移酶制备O-乙酰丝氨酸,L-半胱氨酸和由其衍生的含硫化合物。 与野生型酶相比,这些丝氨酸乙酰转移酶对抑制剂L-半胱氨酸和蛋白质序列的敏感性降低,与野生型酶相比,显示至少一种突变或缺失。 该方法具有位于第97位的氨基酸的序列区,直至包括位置273的氨基酸的氨基酸的序列区域或缺失位于羧基末端序列区域,如位置227的氨基酸位置1为 图1的起始蛋氨酸 5(SEQ ID NO:1)和从位置256处的Met到Ile的突变被排除。
摘要:
A cooling plate for shaft furnaces, particularly blast furnaces, is provided with a refractory lining and is composed of copper or a low-alloy copper alloy with cooling medium ducts, wherein the cooling plate is made from a wrought or rolled ingot, and wherein the cooling plate has on one side thereof, i.e., the front side, grooves for receiving refractory material. Cooling ducts are provided on the rear side of the cooling plate, wherein the cooling ducts are defined in part by the cooling plate itself and in part by sheet metal or sheet steel, wherein the cooling ducts are produced by milling cutting in the rear sides of the cooling plate and/or the sheet metal or sheet steel.
摘要:
A device for selection of address words, each having n bit locations and serving for addressing m different receiving locations of a digital communications apparatus, comprising a digital acceptance device via which address words can be selected which are acceptable for the particular receiving location in consideration. The acceptance device includes an address word segmenting device through which each address word received by the receiving location is subdivided into s address word segments with b segment bit locations each, wherein b=n/s and n is an integral multiple of s, a decoder having a decoder input accepting the bit pattern of the address word segment of the particular address word being examined for acceptance, and having a decoder output at which, for each of the possible segment bit patterns, a decoder output bit pattern representing only this segment bit pattern is available. The device also includes s filter registers associated with one of the address word segments each, for storing filter register bit patterns, a comparison circuit through which the decoder output bit pattern can be compared with the contents of the associated filter register, the output providing an examination result signal which is either a conformity signal or a non-conformity signal. The device also includes an evaluation circuit, that delivers an acceptance signal only when a conformity signal has been present at the output of the comparison circuit for each address word segment of this address word.
摘要:
Method and apparatus are provided for the two-step rolling of predominantly profiled rings, for example, anti-friction bearing rings, with diameter enlargement in two rolling steps in one working sequence for the considerable reduction of the stress on the rolling mandrel.