摘要:
In one aspect, the invention provides methods for forming a target tissue substitute. The methods of the invention comprise the following steps: (a) providing a scaffold comprising one or more layers of one or more arrays of microfibers, wherein one or more of the arrays of microfibers is designed to mimic the configuration of one or more structural elements in a target tissue; and (b) culturing cells on the scaffold to form a target tissue substitute. In another aspect, the invention provides implantable medical devices. The implantable medical devices of the invention comprise a scaffold comprising one or more layers of one or more arrays of microfibers, wherein one or more of the arrays of microfibers is arranged to mimic the configuration of one or more structural elements in a target tissue. Typically, cells are cultured on the scaffold to form a target tissue substitute.
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:
A wireless telephone includes first and second baseband processors. The first baseband processor (GSM) functions as system master, and the second processor (TDMA) functions as system slave. The first baseband processor interfaces to system controls, such as power supply, man-machine interface (MMI), and the like.
摘要:
The invention relates to a process for the dehydrogenative condensation of alcohols and siloxanes which have at least one hydrogen atom bound to a silicon atom in the molecule, wherein at least one quaternary ammonium hydroxide is used as effective catalyst in this reaction.
摘要:
A wireless telephone includes first and second baseband processors. The first baseband processor functions as system master, and the second processor functions as system slave. The first baseband processor interfaces to system controls, such as power supply, man-machine interface (MMI), and the like. The master processor implements a first pair of buffers in the downlink direction and a second pair in an uplink direction. The buffers in the pairs are swapped periodically, based on an internal counter running on the master processor. The timing of the master processor is continuously adjusted to that of the slaved co-processor, by counting a number of samples received from the microphone respectively fed to the earpiece between the beginning of consecutive frames. The timing of the master processor is then adjusted accordingly. The output of the counter may be lowpass filtered to separate jitter from frequency deviation.
摘要:
To prepare N-phosphonomethyl glycine,a) aminomethylphosphonic acid or one of its salts in water, if necessary or desirable with the addition of lyes, is reacted with an alkali carbonate and/or alkali hydrogencarbonate or with carbon dioxide and a lye,b) the resulting alkali salt of N-phosphonomethylcarbamic acid is subsequently hydroxymethylated with formaldehyde,c) the salts, resulting from b), of N-hydroxymethyl-N-phosphonomethyl-carbamic acid, if necessary or desirable with addition of a lye, are reacted with hydrocyanic acid and/or a cyanide andd) the N-carboxy-N-phosphonomethylglyconitrile salts thus obtained are treated with acids and converted by means of hydrolysis and decarboxylation into N-phosphonomethyl glycine.In this way, it is possible to obtain excellent yields of high-purity N-phosphonomethyl glycine.
摘要:
An apparatus for separating out light materials from mineral raw materials is provided. The apparatus includes a charging device that has a charging tube provided with an eccentrically arranged inlet for tangential introduction of raw material. The apparatus also has an inner chamber for separating out coarse sand received from the charging tube, and an outer chamber that serves for sorting out fine sand pursuant to the fluidized bed process. The outer chamber communicates with an overflow chute of the charging tube via an inclined overflow surface. An impingement body is centrally disposed in the inner chamber while leaving free an outer annular gap. The charging tube opens out centrally above the impingement body. A perforated basket, for adjusting flow resistance, is disposed so as to be displaceable in the axis of the charging tube and bridges a space between the impingement body and the end of the charging tube. The overflow chute of the charging tube is provided at that end thereof remote from the impingement body. As a function of a separation particle size setting of the charging device, which is adjusted by displacement of the perforated basket, the overflow chute communicates either with the outer chamber or with a light material overflow associated therewith.
摘要:
A method for 3D imaging of a biologic object (1) in an optical tomography system where a subcellular structure of a biological object (1) is labeled by introducing at least one nanoparticle-biomarker. The labeled biological object (1) is moved relatively to a microscope objective (62) to present varying angles of view and the labeled biological object (1) is illuminated with radiation having wavelengths between 150 nm and 900 nm. Radiation transmitted through the labeled biological object (1) and the microscope objective (62) within at least one wavelength bands is sensed with a color camera, or with a set of at least four monochrome cameras. A plurality of cross-sectional images of the biological object (1) from the sensed radiation is formed and reconstructed to make a 3D image of the labeled biological object (1).
摘要:
The present invention relates to the use for affinity purification of an antibody or an fragment of an antibody, of a ligand-substituted matrix comprising a support material and at least one ligand covalently bonded to the support material, the ligand being represented by formula (I) wherein Sp is a spacer group; v is 0 or 1; Am is an amide group —NR1—C(O)—, and wherein either NR1 is attached to Ar1 and —C(O)— is attached to Ar2, or —C(O)— is attached to Ar1 and NR1 is attached to Ar2; and R1 is hydrogen or C1 to C4 alkyl, preferably hydrogen or methyl; and more preferably hydrogen; Ar1 is a divalent 5- or 6-membered substituted or unsubstituted aromatic ring; Ar2 is 5- or 6-membered heterocyclic aromatic ring which is (a) attached to a further 5- or 6-membered aromatic ring via a single bond; or (b) fused to a further 5- or 6-membered aromatic ring as part of a multicyclic ring system; or (c) attached to at least one substituent selected from C1 to C4 alkyl; C2 to C4 alkenyl; C2 to C4 alkynyl; a halogen; C1 to C4 haloalkyl; hydroxyl-substituted C1 to C4 alkyl; C1 to C4 alkoxy; hydroxyl-substituted C1 to C4 alkoxy; C1 to C4 alkylamino; C1 to C4 alkylthio; and combinations thereof.
摘要:
An optical tomography system for imaging an object of interest including a light source for illuminating the object of interest with a plurality of radiation beams. The object of interest is held within an object containing tube such that it is illuminated by the plurality of radiation beams to produce emerging radiation from the object containing tube, a detector array is located to receive the emerging radiation and produce imaging data used by a mechanism for tracking the object of interest.