摘要:
To improve low noise operation of a brushless permanent magnet d-c motor, and reduce voltage peaks and stresses on switching transistors connected in series with stator windings thereof, a galvanomagnetic sensing element, such as a Hall generator, is located on the stator positioned in the gap between adjacent poles and subjected to stray leakage flux from the stator poles in such a way -- for example by means of soft-iron flux guide elements -- that the leakage field from the stator pole which is oppositely poled -- at any instant of operation -- to the rotor pole which controls operation of the galvanomagnetic sensing element provides a counter-acting flux to the galvanomagnetic sensing element, thus flattening the turn-off flanks of control pulses controlling current flow through the stator winding.
摘要:
In the case of a collector-less D-C motor designed as a disc motor with an external rotor, the permanently magnetized external rotor is supported in an axially space-saving manner in a bearing tube attached to the stator bedplate. For the purpose of facilitating centering of the stator bedplate in the air gap of the rotor during manufacture, a flange plate inserted onto the bearing tube serves for anchoring purposes, and the stator bedplate is secured to this flange plate.
摘要:
Azo pigments of the formula ##EQU1## wherein A is a condensed ring system consisting of a benzene ring and a 5- or 6-membered hetero ring having nitrogen in the cyclus and a keto group, R is alkyl, cycloalkyl or aryl and Y is hydrogen, halogen, alkyl, cycloalkyl, alkoxy, aryl or nitro, and the azo group is not bonded directly to the hetero ring of the diazo component, are prepared. These pigments are useful for coloring organic material of high molecular weight, such as cellulose ethers and esters, and polyesters. Th pigments have excellent fastness to light and migration.
摘要翻译:式CO-CH3 | AN = N-CH-CO-NH的偶氮颜料,其中A是由环和在环境中具有氮的酮或五元组的5-环或六元杂环组成的稠环体系, R是烷基,环烷基或芳基,Y是氢,卤素,烷基,环烷基,烷氧基,芳基或硝基,并且偶氮基团不直接键合到重氮组分的杂环上。 这些颜料可用于着色高分子量的有机材料,如纤维素醚和酯,以及聚酯。 Th颜料具有优异的光照和迁移牢度。
摘要:
The present invention relates to a polymer mixture with a low viscosity, allowing processes for the processing of plastics materials to be accelerated while the final properties of the end products remain the same or are improved. The polymer mixture is mixed with the plastics materials in the manner of an additive. The invention further relates to the production of suitable polymer mixtures of this type and to the use thereof.
摘要:
Compositions and methods are disclosed for automated storing, tracking, retrieving and analyzing biological samples, including dry storage at ambient temperatures of nucleic acids, proteins (including enzymes), and cells using a dry storage matrix that permits recovery of biologically active materials. RFID-tagged biological sample storage devices featuring dissolvable or dissociable matrices are described for use as supports of biological samples, which matrices can be dried and subsequently rehydrated for sample recovery. Also disclosed are computer-implemented systems and methods for managing sample data.
摘要:
The present invention concerns substances which act as selective ligands of nuclear receptors of the PPAR beta/delta subtype and which can be used for the treatment of PPAR beta/delta-mediated diseases. The substances of this invention act as inhibitors of PPAR beta/delta receptors.
摘要:
Compositions and methods are disclosed for automated storing, tracking, retrieving and analyzing biological samples, including dry storage at ambient temperatures of nucleic acids, proteins (including enzymes), and cells using a dry storage matrix that permits recovery of biologically active materials. RFID-tagged biological sample storage devices featuring dissolvable or dissociable matrices are described for use as supports of biological samples, which matrices can be dried and subsequently rehydrated for sample recovery. Also disclosed are computer-implemented systems and methods for managing sample data.
摘要:
Compositions and methods are disclosed for substantially dry storage at ambient or elevated temperatures of biological samples such as nucleic acids, proteins and cells in a form from which the samples can be substantially recovered, using a dissolvable or dissociable dry storage matrix comprising a borate composition and a stabilizer as disclosed, such as any of a number of zwitterionic stabilizers.
摘要:
This invention is related to bacterial engineering and the heterologous expression of useful compounds. In particular, the invention relates to a heterologous host that has been engineered for expression of a gene which is capable of polyketide or non-ribosomal peptide synthesis. Methods of treating cancer are also disclosed.
摘要:
The present invention relates to a polymer mixture with a low viscosity, allowing processes for the processing of plastics materials to be accelerated while the final properties of the end products remain the same or are improved. The polymer mixture is mixed with the plastics materials in the manner of an additive. The invention further relates to the production of suitable polymer mixtures of this type and to the use thereof.