摘要:
A polyurethane composition containing a polyurethane prepolymer, a foam stabilizer, a diluent, and optional auxiliary agents, useful as an adhesive for building insulation and/or decorative facing on a variety of substrates.
摘要:
A method of providing a foam accoustical insulation, thermal insulation, and/or moisture-barrier, in which a polyurethane prepolymer composition is applied to a substrate in situ and then expanded and cured using water pre-applied to the substrate, ambient atmospheric moisture, and/or added atmospheric moisture.
摘要:
In a device for dosing two-component products of a predetermined mixing ratio, the dispensing accuracy has been improved in conjunction with simple design and uncomplicated operation. According to the invention, two chambers are provided which are put under pressure by means of two pistons that are displaced simultaneously in opposite directions from a starting point. A mixer means is arranged at the closed longitudinal end of a first chamber, while the closed longitudinal end of the other chamber is connected to the mixer means over a component line that leads centrally through the first chamber.
摘要:
The invention relates to an accessory for an apex locating apparatus, characterized in that it comprises a fitting (16) held with the aid of electrically conducting fastening means (20, 50) to the tooth to be treated or to a neighbouring tooth (14) and which comprises first means (36, 54) for wire-based electrical connection (44) between the apex locating apparatus (2) and the endodonty tool (46), and second means (28, 52) for wire-based electrical connection (34) between said apparatus (2) and the patient. The invention also relates to such an accessory characterized in that it comprises means for wireless electrical connection between said fitting and said apex locating apparatus.
摘要:
A thermionic cathode of tungsten or molybdenum is made with an activating content of lanthanum oxide and is supplied with a carbonaceous reducing agent either by incorporation in the bulk material of the cathode body or by carburizing, so that the reducing agent comprises at least in part a carbide of the carrier metal. Lower operating temperatures and higher emissivity are obtained compared to thoriated tungsten filaments and longer useful life compared to other cathodes activated by other rare earth oxides. The temperature-emissivity characteristics are such that good results are obtainable even within the temperature range in which molybdenum is usable as a carrier material.
摘要:
The automatic filling and packaging of foodstuffs under aseptic to low-bacterial count conditions is accomplished by disinfecting a packaging material for at least one second by means of high-intensity ultraviolet radiation, generated by a high-current, low-pressure mercury discharge with a current density of more than 1 A/cm.sup.2 and a mercury pressure of 5 .times. 10.sup.-3 to 5 .times. 10.sup.-1 Torr, wherein the spectral radiation intensity of the 253.7 nm line of the ultraviolet radiation UV on the packaging material 1, 2, 3 is set to at least 0.05 W/cm.sup.2.
摘要翻译:通过对低细菌计数条件无菌的食品的自动灌装和包装通过用高电流,低压汞放电产生的高强度紫外线辐射消毒至少一秒的包装材料来实现,具有 电流密度大于1A / cm2,汞压为5×10-3至5×10-1乇,其中包装材料1,2和2上的紫外线UV的253.7nm线的光谱辐射强度, 3设定为至少0.05W / cm 2。
摘要:
The invention relates to an accessory for an apex locating apparatus, characterized in that it comprises a fitting (16) held with the aid of electrically conducting fastening means (20, 50) to the tooth to be treated or to a neighbouring tooth (14) and which comprises first means (36, 54) for wire-based electrical connection (44) between the apex locating apparatus (2) and the endodonty tool (46), and second means (28, 52) for wire-based electrical connection (34) between said apparatus (2) and the patient. The invention also relates to such an accessory characterized in that it comprises means for wireless electrical connection between said fitting and said apex locating apparatus.
摘要:
The automatic filling and packaging of foodstuffs under aseptic to low-bacterial count conditions is accomplished by disinfecting a packaging material for at least one second by means of high-intensity ultraviolet radiation, generated by a high-current, low-pressure mercury discharge with a current density of more than 1 A/cm.sup.2 and a mercury pressure of 5.times.10.sup.-3 to 5.times.10.sup.-1 Torr, wherein the spectral radiation intensity of the 253.7 nm line of the ultraviolet radiation UV on the packaging material 1, 2, 3 is set to at least 0.05 W/cm.sup.2.
摘要翻译:通过对低细菌计数条件无菌的食品的自动灌装和包装通过用高电流,低压汞放电产生的高强度紫外线辐射消毒至少一秒的包装材料来实现,具有 电流密度大于1A / cm 2,汞压为5×10 -3至5×10 -1 Torr,其中包装材料1,2,3上紫外线UV的253.7nm线的光谱辐射强度设定为 至少0.05W / cm 2。
摘要:
Apparatus for generating ultraviolet radiation of high spectral radiance whereby the radiation is produced in a discharge tube having a thermoemissive cathode and a discharge space and filled with mercury/argon by means of a wall-stabilized direct-current gas discharge at a mercury pressure p.sub.Hg of between 5 .times. 10.sup.-.sup.3 and 5 .times. 10.sup.-.sup.1 Torr and a current density j of the discharge current I of between 1 and 25 A/cm.sup.2. The discharge tube incorporates a pressure-equalizing space connecting the cathode space to the anode space whereby the sum of the volumes of the cathode space, anode space and pressure-equalizing space is greater than the volume of the discharge space. The pressure of the argon is maintained between 0.01 and 10 Torr. A first control element is provided which regulates the current density j of the discharge current I to a constant value j.sub.O between 1 and 25 A/cm.sup.2. A second control element is provided which regulates the pressure p.sub.Hg of the mercury to such a value that the yield .eta. of the line of wavelength 2537 A, i.e. the ratio of the spectral radiation power for the wavelength .lambda.= 2537 A to the electrical power stored in the discharge, is at least 80% of the maximum yield .eta..sub.max for the chosen current density j.sub.O.
摘要翻译:用于产生高光谱辐射的紫外辐射的装置,由此在具有热发射阴极和放电空间的放电管中产生辐射,并且通过在汞压力pHg下的壁稳定的直流气体放电填充有汞/氩 在5×10 -3和5×10 -1托之间,放电电流I的电流密度j在1和25A / cm 2之间。 放电管包括将阴极空间连接到阳极空间的压力均衡空间,由此阴极空间,阳极空间和压力平衡空间的总和大于放电空间的体积。 氩气的压力保持在0.01和10乇之间。 提供了第一控制元件,其将放电电流I的电流密度j调节到1至25A / cm 2之间的恒定值jO。 提供了一种第二控制元件,其将汞的压力pHg调节到波长为2537A的线的屈服等级即波长λ= 2537A的光谱辐射功率与存储的电功率的比值 在放电中,是所选电流密度jO的最大产量最大值的至少80%。