摘要:
A method of microdissection which involves forming an image field of cells of the tissue sample utilizing a microscope, identifying at least one zone of cells of interest from the image field of cells which at least one zone of cells of interest includes different types of cells than adjacent zones of cells, and extracting the at least one zone of cells of interest from the tissue sample. The extraction is achieved by contacting the tissue sample with a transfer surface that can be selectively activated so that regions thereof adhere to the zone of cells of interest to be extracted. The transfer surface includes a selectively activatable adhesive layer which provides, for example, chemical or electrostatic adherence to the selected regions of the tissue sample. After the transfer surface is activated, the transfer surface and tissue sample are separated. During separation, the zone of cells of interest remains adhered to the transfer surface and is thus separated from the tissue sample, the zone of cells of interest may then be molecularly analyzed.
摘要:
This invention relates to pendralin �2,6-dinitro-N-(1-ethylpropyl)-4-tert-butylaniline!, preemergence and postemergence herbicidal methods and herbicidal compositions employing pendralin.
摘要:
A irradiation attachment for an optical fiber which provides an output of light that has a highly uniform intensity. The device includes a hollow spherical shell having a diffusive reflective surface or target supported therein. Light is directed into the hollow spherical shell so that it reflects off the diffusive reflective surface or target. The reflected light is internally reflected off the inner surface of the hollow spherical shell several times before passing through an output aperture. As a result of the internal reflection within the hollow spherical shell, the light leaving the device has a highly uniform intensity. The device is particularly useful for photodynamic therapy.
摘要:
A method of optimizing photodynamic therapy in which retained concentrations of photosensitizers administered are measured on a real time basis by percutaneous measurements of fluorescence. A light weight hand held fluorometer is used to percutaneously measure fluorescence emitted by photosensitizers in a tissue situs that is subject to photodynamic therapy. The use of real time determinations of the concentration of photosensitizers allow optimization of illumination intensity and duration.
摘要:
Disclosed herein are position determining apparatus and conductor structures or grids therefor. The conductor structure for each axis includes a number of conductors which are run in a serpentine-type path each with uniform repeat increment. The repeat increment, which is the spacing or span between one run and the next of the same serpentine-type conductor, are uniform for each conductor (but may change from conductor to conductor) and is constrained by a maximum repeat increment, or a minimum repeat increment. In the preferred embodiments, there is at least a constraint on the maximum repeat increment to provide noise immunity. The conductors are arranged for each axis of the grid in a pattern such that signals obtained for that axis may be processed to provide binary numbers in a Gray-type code each unique to a small region of the active area in which the coil center is located. The small region for a given axis corresponds to the space between two immediately adjacent, active conductor portions for that axis, with a possible ambiguity of one space. Small regions in each axis define the coarse location of the coil center. Fine location within a region may be determined from the magnitudes of currents induced in selected runs preferably by interpolation.
摘要:
Olefin polymerization catalysts, processes for preparing the catalysts and processes for producing polyolefins utilizing the catalysts are provided. The catalysts are basically comprised of a trialkylsilylamide-chromium complex adsorbed on an activated inorganic compound.
摘要:
Olefin polymerization catalysts, processes for preparing the catalysts and processes for producing polyolefins utilizing the catalysts are provided. The catalysts are basically comprised of a trialkylsilylamide-chromium complex adsorbed on an activated inorganic refractory compound.
摘要:
A triangular space station deployable in orbit. The framework is comprised of three trusses, formed of a pair of generally planar faces comprised of foldable struts which expand and lock into rigid structural engagement forming a repetition of equilateral triangles and non-folding diagonal struts interconnecting the two faces. The struts are joined together by node fittings. The framework can be packaged into a size and configuration which can be transported by a space shuttle orbiter in a single orbital flight and when deployed, provides large work/construction area and ample planar surface area for solar panels and thermal radiators. A plurality of modules are secured to the framework and then joined by tunnels to comprise an interconnected modular array disposed along the free edges of the framework. Thruster units for space station orientation and altitude maintenance are provided. The triangular space station provides a structurally stable unit having sufficiently high structural integrity and natural frequency for facilitating docking, satellite servicing and launch operations.
摘要:
A system includes a plurality of inputs each configured to receive a filtered version of a source signal. The system extracts the energy information from each input signal and compares the energy information of a plurality of input signals. Alternatively, the system extracts energy information from a signal that is the difference of two input signals. Based on the energy information, the system determines at least one parameter that may be changed in at least one circuit in a plurality of circuits to minimize the differences in energy of the input signals or to minimize the energy of the difference signal. Parameters may include for example amplification, delay, and corner frequency values.The set of circuits may include microphone interface circuits. Merely by way of example, a system with microphone interface circuits may be included in a hearing enhancement device or in a hands-free earpiece.
摘要:
A fire detection system includes a detection tube and a sensing device. The detection tube contains a sensing fluid having a first physical condition and a second physical condition. The sensing fluid is in the first physical condition below a temperature threshold, and is in the second physical condition above the temperature threshold. The sensing fluid is at least partially liquid in the first physical condition. The sensing device is movable to open in response to a transition of a portion of the sensing fluid from the first physical condition to the second physical condition.