摘要:
The present invention relates to novel conjugated polymers comprising spirobifluorene units and their use in optoelectronic devices, preferably in, for example, displays based on polymeric organic light-emitting diodes.
摘要:
The present invention relates to novel conjugated polymers comprising spirobifluorene units and their use in optoelectronic devices, preferably in, for example, displays based on polymeric organic light-emitting diodes.
摘要:
The invention describes a process for the production of coarse crystalline alumina from aluminum hydroxide, which after preparation by known methods is advantageously useful for abrasives, lapping and polishing purposes or for refractory materials. The process is characterized by aluminum hydroxide, either directly or after previous partial dehydration in the range 200.degree.-550.degree. C., being added with a mineralizer of compound type x(BF.sub.4).sub.n, wherein x stands for NH.sub.4 and metallic elements and n is for the formal valence of x, and subsequently is subjected to an elevated temperature treatment between 750.degree. C. and a value higher than the phase change temperature to .alpha.-Al.sub.2 O.sub.3.
摘要翻译:本发明描述了一种由氢氧化铝生产粗结晶氧化铝的方法,其在通过已知方法制备之后有利于研磨剂,研磨和抛光目的或耐火材料。 该方法的特征在于氢氧化铝,直接或先前部分脱水在200〜-550℃范围内,加入x(BF 4)n化合物的矿化剂,其中x代表NH4和金属元素,n 是用于x的正式化合价,随后在750℃和相对于α-Al 2 O 3的相变温度高的温度下进行高温处理。
摘要:
O/W emulsifying agents are described, comprising: (a) hardened palm oil glycerides and (b) potassium cetyl phosphate wherein the proportion of potassium cetyl phosphate is in the range from 40 to 80% by weight, based on the total mass of the emulsifying agent. Also described are corresponding O/W emulsions, comprising a water phase, an oil phase dispersed in the water phase and 0.25 to 15% by weight of the aforementioned O/W emulsifying agent. Finally, methods for producing an O/W emulsion of this type are also described.
摘要:
A torsional spring to be secured non-rotating to mutually rotating components at each end. At least two thin-walled piping sections are positioned loosely coaxial and secured together non-rotating at one end, accordingly functioning as a series of resilient sections. There are means of securing them non-rotating to the mutually rotating components at the other end. The spring especially constitutes a torsion bar for a connecting rod that pivots in a bearing mounted stationary in a vehicle and positions either a running wheel or a caterpillar cogwheel at the end remote from the bearing. The piping sections are integrated into each other such that one merges directly into the other at the end where they are secured together non-rotating in a turnback that represents a transition point. The piping sections are preferably made of fiber-reinforced plastic and may have several layers.
摘要:
The invention concerns an O/W emulsifier, an O/W emulsion prepared therefrom and the uses thereof. According to the invention the O/W emulsifier contains (a) 70 to 90 wt. % of glyceryl oleate citrate and (b) 10 to 30 wt. % of a viscosity modifier having a viscosity in the range from 1 to 10,000 mpas.
摘要:
bumper arrangement for a motor vehicle includes a bumper mounted in such a way that it can be moved between a rest position and an operating position. A spring acts on the bumper and is prestressed in the rest position. A locking device holds the bumper in the rest and/or operating position. A control unit actuates the locking device as a function of signals from an accident detection sensor system. When the locking device is unlocked, the spring moves the bumper abruptly into the operating position in which the bumper absorbs impact loads resulting from relative velocities up to a predetermined limit in a substantially elastic manner.
摘要:
Stem cells or other organ-function cells are cultivated in a fluidized bed system on macroporous glass carrier bodies treated with a structure protein such as gelatin and an extracellular matrix protein such as fibronectin, and coated with a stroma cell layer. Glass carriers coated with gelatin are added to a fluidized bed reactor, and a culture medium containing an extracellular matrix protein is added to bind the protein to the gelatin. Stromal cells are then added and the cells are cultured to immobilize the cells on the carriers containing the bound protein. Immature organ-function cells are added to the reactor, and while generating a fluidized bed of the carriers in the culture medium, the culture medium is recirculated from and to the reactor in a recirculation loop. Bubble-free aeration of the culture medium is effected to cultivate the immature organ-function cells on the carriers to obtain both mature differentiated organ-function cells and progenitor organ-function cells. Mature differentiated organ-function cells which are released from the carriers are harvested from the reactor while retaining the progenitor organ-function cells which adhere to the carriers to provide an equilibrium between the harvested mature differentiated organ-function cells, the progenitor cells and the immature cells added to the reactor. Growth and regulatory factors for cultivating organ-function cells can be produced by culturing immobilized stromal cells in the reactor in the absence of the organ-function cells.