33 results about "General screening" patented technology

An ingestible device adapted to travel within the gastrointestinal tract and perform diagnostic imaging of tissues therein is provided. The diagnostic image may include diagnostic information as a function of time, or as a function of distance traveled within the gastrointestinal tract. In particular, the ingestible device may be arranged to perform nuclear radiation of a radiopharmaceutical, scintillation of a scintillation liquid in response to nuclear radiation of a radiopharmaceutical, optical fluorescence of a fluorescing drug or bare gastrointestinal tissue, gastrointestinal Diagnostic imaging of tissue infrared radiation, temperature differential along the gastrointestinal tract, impedance, ultrasound reflections, magnetic resonance, and combinations thereof. The ingestible device may be suitable on the one hand for general screening of large populations and on the other hand for specific diagnosis of possible pathologies.

The invention discloses water-saving industrial silt screening equipment. The water-saving industrial silt screening equipment mainly comprises a material conveying mechanism, a residue throwing mechanism, a vibration screening mechanism, a stirring and water injecting mechanism, a left transmission assembly and a right transmission assembly, wherein the residue throwing mechanism comprises a machine body, a driving cavity, a motor, a first driving shaft, a sliding block and a first torsion spring, the vibration screening mechanism comprises a connecting rod, a first long plate, a first through groove, a second long plate, a second through groove and a screen, the stirring and water injecting mechanism comprises a material storage box, a stirring cavity, a second transmission cavity and asecond rotating shaft. The water-saving industrial silt screening equipment has the beneficial effects that a mechanical mechanism is used for driving the screen to vibrate up and down so as to screenout industrial waste residues while clear water is adopted for scouring, compared with general screening equipment, the water-saving industrial silt is high in screening speed and high in efficiency,in addition, after the water-saving industrial silt screening equipment finishes screening, silt with water is stirred to enable the water flow to enter a water pump again to be recycled through water falling fine holes, and the water-saving industrial silt screening equipment is energy-saving and environment-friendly, safe and reliable, and high in automation degree.

The present invention relates to a method for screening metal matrix protease inhibitors at the cell level, comprising: (1) designing primers to amplify the full-length cDNA of metal matrix proteases by PCR; (2) constructing expression using Retro X Tet Off as a carrier system; (3) transfect the cell line with the vector constructed above, and screen positive clones, and when the cells cover the bottom of the dish, replace the culture medium with a DOX-free medium to induce the expression of MMPs; (4 ) to screen out matrix metalloproteinase inhibitors. The present invention establishes a method based on the Tet-off expression system, which can simulate the action environment of MMP to the greatest extent, and is used for the screening of MMP inhibitors, which is more accurate than the in vitro screening of general metal matrix protease inhibitors.

In view of the technical problem that in the current detection standard system for meat, animal-derived detection methods can only be qualitative or semi-quantitative, and the severity of adulteration cannot be judged, the present invention provides quantitative determination based on high performance liquid chromatography tandem mass spectrometry A variety of methods for meat of animal origin. In order to achieve the purpose of the present invention, the present invention screens characteristic polypeptides of standard meat samples of chicken, duck, pork, beef and mutton, and applies the characteristic polypeptides to quantitatively detect adulteration of meat samples. The quantitative detection method of the present invention comprises: pretreatment of the meat sample to be tested, and detection of characteristic polypeptides in the meat sample by high performance liquid chromatography-mass spectrometry. The invention also provides a relatively general screening method for standard meat-like characteristic polypeptides. Provide effective technical means for the supervision of meat sample adulteration in the meat market.

The invention provides a drum type sand screening device based on building construction, comprising a rotary drum for screening sand, a fixed shaft, two side support plates, and a material extraction and screening mechanism for screening sand and a dispersing screening mechanism for further screening of sand, the surface of the rotating drum is provided with a bearing adapted to a fixed shaft, the surface of the fixed shaft is fixedly connected with the inner ring of the bearing, and relates to the field of construction. According to the problem of high energy and low efficiency in the existing sand screening device, the drum type sand screening device based on building construction is designed with a special structure that can disperse and screen sand and comprehensively screen sand. This effectively solves the problem that the general screening device is difficult to break the sand and agglomerates, and due to the influence of the fluidity of the sand itself, many sands cannot contact the screen for screening during the flow, often doing useless work, resulting in high energy consumption and low efficiency. The problem.

The invention discloses a general screening kit and detection method for animal-derived components based on melting curve technology, and relates to the technical field of molecular biology detection. The invention designs universal primers and molecular beacon fluorescent probe compositions for the gene fragments with specific structural characteristics in the genomes of 9 kinds of livestock and poultry animals. Taking the genomic DNA of the sample to be tested as a template, applying the kit and method disclosed in the present invention to carry out real-time fluorescent PCR detection and melting curve analysis, by comparing the shape of the melting peak of the sample to be tested and the corresponding characteristic melting temperature (Tm value), Realize the rapid identification of 9 kinds of animal-derived components of livestock and poultry under the condition of a single tube. The system of the invention is simple in structure, low in application cost, high in sensitivity, strong in specificity and good in applicability, and can be used for rapid screening of animal-derived components in food, feed and other samples and identification of adulteration and counterfeiting.