摘要:
The invention relates to a device for processing biological material, which at least comprises a chamber which at least can be closed in relation to the outside and which comprises an inner space for receiving said biological material, wherein said chamber comprises at least one electrode which is placed in contact with said inner space of said chamber and is provided for generating an electric field. The invention also relates to a method for processing biological material, wherein said biological material is introduced into the inner space of a chamber which at least can be closed in relation to the outside and which comprises at least one electrode which is placed in contact with said inner space of said chamber and is provided for generating an electric field which is generated in said inner space after introducing said biological material by applying voltage to said electrode and a further electrode which is in contact with said inner space of said chamber. According to the invention, said chamber comprises at least one inlet line which comprises at least one opening arranged close to said electrode. According to the inventive method, said biological material is almost completely rinsed out of said inner space of said chamber by means of a solution after said electric field is generated, said solution being guided via an inlet line of said chamber along at least one electrode.
摘要:
The invention relates to a method for generating at least one electrically contactable area on a polymer which is doped with a conductive substance, wherein a contact material is applied onto the polymer, which has a lower specific resistance at 23° C. than the polymer. According to the invention the contact material is applied onto the polymer so tightly that close contact between the contact material and the conductive substance is achieved. Due to the tight application of the contact material, which has a lower specific resistance than the polymer, the input resistance of the doped polymer is effectively reduced. The invention further concerns a formed body made of a polymer which is doped with a conductive substance, which has at least one contactable area, within which a contact material is applied onto the polymer, which has a lower specific resistance at 23° C. than the polymer. According to the invention the contact material is applied onto the polymer so tightly that it is in close contact to the conductive substance. Such formed body has a significantly reduced input resistance.
摘要:
The invention relates to a container 20, 30 for receiving an aqueous solution, which is formed at least partially by an outer limit 21 forming an inner chamber 22, 32 for receiving the solution, and which comprises at least one area which acts as an electrode 25, 26, 33, 34 when an electric voltage is applied and a subsequent discharge occurs, wherein at least one electrode 25, 26, 33, 34 is made of a conductive synthetic material at least based on a plastic material which is doped with at least one conductive substance. A container 20, 30 of the above-mentioned kind is created this way, which is simple and economical to produce and also, for example, enables an efficient transfection of living cells by means of electroporation or an effective electrofusion.
摘要:
A supported catalyst includes: a) 0.5-15 wt. % of one or more Cu-II compounds, the quantitative amounts referring to copper metal; b) 0.1-8 wt. % of one or more alkali metal compounds, the quantitative amounts referring to alkali metal; c) 0.1-10 wt. % of an oxide mixture including; c1) 80-95 mole % of oxides of cerite rare earths with atomic Nos. 57 to 62, except promethium, and c2) 5-20 mole % of zirconium dioxide, where c1) and c2) must together total 100 mole % and the quantitative amount of c) refers to the oxides of the mixture, and d) the remainder up to 100 wt. % being .gamma. and/or .alpha.-aluminum oxide as support material, wherein e) the support material d) has a total pore volume in the range from 0.65 to 1.2 cm.sup.3 /g, and wherein f) the supported catalyst is present in the form of cylindrical hollow bodies having at least one passage channel, the ratio of height h to external diameter d.sup.e being less than 1.5 for diameters d.sub.e of up to 6 mm, and the ratio h/d.sub.e being less than 0.6 for diameter d.sub.e greater than 6 mm. A process for producing the supported catalyst is also described.
摘要:
Reel cutter and method for a substantially continuously winding-on of partial web rolls. The reel cutter may include a cutting section adapted for cutting a material web into a plurality of partial webs and a winding section adapted for winding the plurality of partial webs onto partial web rolls. The partial web rolls may be arranged such that neighboring partial web rolls are located in winding position groups positionally offset from one another. The winding section may include at least one additional and no more than twice the number of winding position groups necessary for winding-on of the partial web rolls. The method may include positionally offsetting at least a first and second winding position groups such that each winding position group includes a plurality of winding positions that are axially spaced apart, positionally offsetting at least a third winding position group, alternatingly guiding neighboring partial webs to the first and second winding position groups, and winding the partial webs into partial web rolls. The method may also include preparing the third winding position group to include winding positions that correspond to the first winding group, completing the winding on of the partial web rolls of the first winding group, and transferring the partial webs from the first winding group to the third winding group.
摘要:
Ring-halogenated benzoyl chlorides are obtained in a particularly advantageous manner if ring-halogenated benzotrichlorides are reacted with formic acid in the presence of iron salts.
摘要:
4-Fluorothiophenol is obtained in outstanding purifies and yields if 4-fluorobenzenesulphonyl chloride is reacted with sodium hydrogen sulphite solution to give a solution of sodium 4-fluorobenzenesulphinate, this solution is reduced with sulphur dioxide to give 4,4'-difluorodiphenyl disulphide and finally this is reacted with sodium borohydride in a water-miscible inert organic solvent to give 4-fluorothiophenol (sodium salt). Free 4-fluorothiophenol can be isolated from the sodium salt solution by acidification.
摘要:
A holder for filter bags for preparing tea and similar beverages. A clamping body is provided which is embodied in a manner similar to a hair clip, and has three legs which extend approximately parallel to one another. The two outer legs are preloaded relative to one another in a known manner in such a way that they can be brought out of one stable end position (closed position) by closing the angular aperture between the central leg and the two outer legs into the other stable end position (closed position), in which respective slot-like, narrow openings remain between the edges of the central leg and the respectively adjacent edges of the two outer legs. Also provided is a chain, one end of which is fastened to the clamping body, and the other end of which is provided with a hook which is suitable for fastening the chain on components of a brewing container.
摘要:
A pushbutton contactor has means for transforming the contacting function into a locking function or vice versa in which detent means are provided on the actuating member which cooperate with cam surfaces in the guide cylinder of the pushbutton contactor. Different cam surfaces in a guide cylinder are offset from each other and can be brought into operative connection with the detent means. By simple displacement of the actuating member, the function of the pushbutton contact can be changed from a locking to an intermittent contact or vice versa.
摘要:
Photographic panchromatic black-and-white silver halide recording material having two silver halide emulsion layers wherein a layer, called hereinafter first layer, has a panchromatic sensitivity and another layer, called hereinafter second layer, has a blue sensitivity, which is, when determined on comparable wedge images, at density 0.3 at least 0.6 log I.t units higher than its separately considered green and red sensitivity, wherein for the determination of the sensitivities a blue filter, a green filter, and a red filter as characterized in FIG. 1 are used, both said layers having a substantially identical threshold sensitivity to blue light and the spectral sensitivity of this material at 650 nm being at least 0.8 powers of ten lower than at 620 nm, the sensitivity beyond 650 nm diminishing even further.