摘要:
The invention provides a process for preparing SiOC-bonded polyorganosiloxanes by reacting, by processes known per se, hydroxyl-containing compounds with a stoichiometric excess of polyorganosiloxanes which contain —Si(H) units and are of the general formula (I) in the presence of one or more element compounds of main group III and/or of transition group 3 as a catalyst, wherein the reaction, on completion of conversion of the compounds containing hydroxyl groups, is continued until no further ≡Si—H groups are detectable by gas volumetric means, and also the compounds prepared in this way and their use.
摘要:
Creating a tissue structure in vitro includes juxtaposing mandrels on a culture/perfusion device frame where the mandrels are spaced apart substantially parallel to each other and connecting the mandrels to tubes including an upstream tubes and downstream tubes. The upstream tubes are connected with an upstream manifold and the downstream tubes are connected to a downstream manifold. The frame and the mandrels are sterilized, coated and seeded with cells that multiply and form circular layers around each of the mandrels until the circular layers merge into a tissue structure which is subjected to a growth medium. The mandrels are extracted and the tissue structure is perfused.
摘要:
The invention relates to a hydraulic binding agent comprising a binding agent component having free-flowing or solidifying properties when water is added and an acceleration component which is used to accelerate solidification. The acceleration component contains ultrafine calcium hydroxide having a high specific surface and low grain size.
摘要:
The invention relates to a process for the treatment of polyoxyalkylene-polysiloxane block copolymers or alkylpolysiloxane-polyoxyalkylenepolysiloxane block copolymers in which the polysiloxane blocks are bonded to the polyether blocks or alkyl radicals by SiC bonds, wherein the polyoxyalkylene-polysiloxane block copolymers or alkylpolysiloxane-polyoxyalkylenepolysiloxane block copolymers or the solutions thereof are treated with flowing hydrogen gas and optionally a further inert gas in the presence of a combination of hydrogenation catalysts known per se and acid-activated carrier materials and water at temperatures of from 20 to 200° C. and atmospheric pressure over a period of from 0.5 to 10 hours.
摘要:
Microvessel networks are produced in vitro from tissue-engineered parent vessels sprouting into a supporting matrix, as for example gels, of extracellular matrix proteins. The microvessel systems are integrated into devices that allow for controlled perfusion with fluids. The vessels may include cells from one cell type, for example, endothelial cells, or from combinations of two or more cell types.
摘要:
The invention relates to a catalytic system for the dehydrogenative condensation of polyorganosiloxanes with alcohols, consisting of at least one boron compound and at least one synergistically active compound, and to a process for converting polyorganosiloxanes, in which one hydrogen atom bonded to the silicon is replaced by an alkoxide radical using the inventive catalytic system.
摘要:
The present invention accordingly provides new organopolysiloxanes having (meth)acrylic ester groups attached pendent and terminally or only pendent via SiOC groups, of the general average formula (I) and also provides a process for preparing the compounds by reacting polysiloxanes containing SiH groups with (meth)acrylated monoalcohols and/or (meth)acrylated polyalcohols using Lewis-acidic catalysts or catalysts comprising a carboxylic acid and salts thereof.
摘要:
The invention relates to crosslinked organopolysiloxanes which are linked by a polyether building block via the Si atoms, to emulsifier systems which have these crosslinked organopolysiloxanes, and also to cosmetic, dermatological or pharmaceutical formulations comprising a crosslinked organopolysiloxane or an emulsifier system comprising these.
摘要:
A method for creating networks of perfusable microvessels in vitro. Cells including cell types capable of sprouting are seeded 1300 into a channel in a matrix at to activate competency 1304 of the cells for sprouting as microvessels based on the seeding density. The matrix channel is perfused with medium to allow parent vessels to form and for viability 1324. The parent vessels and matrix are incubated and perfused to provide for sprouting of microvessels from parent vessels into the surrounding matrix 1328. The sprouting parent vessels are grown until network forms 1332.
摘要:
A door latch device for a domestic electrical appliance, in particular for a dishwasher, has a frame (10) provided or to be provided on a first component of the domestic appliance, a latching unit (28) arranged so it can be displaced relative to the frame between an open position and a latched position for engagement with a closure system of a second component of the domestic appliance that can be moved relative to the first appliance component and is to be locked with respect thereto, and a latching spring assembly that pre-tensions the latching unit and which in the open position of the latching unit forces the unit into engagement with a blocking surface (24) that blocks relaxation of the latching spring assembly. According to one aspect of the invention a control member (52) that is separate from the latching unit and arranged so it can be moved relative thereto is provided, comprising an application system (64) for an actuating portion of the second appliance component and comprising an impact system for a block-cancelling effect on the latching unit. According to a further aspect the latching unit is formed by a one-piece latching body on which, in addition to a latching system (38) for engagement with the closure system of the second appliance component and a blocking system (50) for engagement with the blocking surface (24), supporting surfaces for the latching spring assembly are also arranged.