5results about How to "Moderate concentration" patented technology

The application relates to the technical field of blood drug concentration detection, and discloses a blood drug concentration analysis method based on mass spectrometric detection, which comprises the following steps: adopting microfluidic technology in combination with solid-phase extraction to pretreat a blood sample to obtain a concentrated solution, so as to remove interfering components and concentrate target drug molecules; according to the physicochemical properties of the target drug molecules, the concentrated solution is selected to flow through a biosensor or is directly introduced into a chromatographic unit, and the target drug molecules in the liquid phase are converted into gas-phase ions when flowing through the biosensor; chromatography-mass spectrometry is adopted to detect the gas-phase ions or the concentrated solution, so as to obtain mass spectrum data; a machine learning model is used to analyze the spectrum data, to identify the drug types and calculate the concentration of the target drug molecules, and to generate an analysis report. The method is suitable for target drugs with different physicochemical properties, simplifies the detection process, and improves the applicability and accuracy of detection.

This invention discloses an effective method for removing residual silicon from the sample introduction system of an inductively coupled plasma mass spectrometer (ICP-MS), belonging to the field of ICP-MS cleaning technology. The method includes the following steps: Step a, introducing a mixed acid solution into the ICP-MS and rinsing the instrument with acid for a period of time, wherein the mixed acid solution comprises HF, HNO3, and H2O; Step b, introducing ultrapure water into the ICP-MS and rinsing the instrument with water for a period of time. This invention can clean the instrument by introducing the mixed acid solution as a sample, eliminating the need for repeated disassembly and cleaning by personnel, thus ensuring accurate quantification of samples by the instrument.

This invention discloses a macrophage digestion solution and a method specifically for macrophage digestion, comprising the following components: 3-6 parts ethylenediaminetetraacetic acid (EDTA), 4-8 parts ethylene glycol bis(2-aminoethyl ether)tetraacetic acid (EDTA), 8-12 parts fetal bovine serum (FBS), and 90-100 parts phosphate buffer. The method specifically for macrophage digestion includes the following steps: preparing a stock solution of digestion solution, filtering it, and storing it at low temperature for 6 months to obtain the macrophage digestion solution; adding the macrophage digestion solution to a macrophage culture flask; shaking the macrophage culture flask containing the digestion solution to ensure even coverage; adding DMEM culture medium to the settled macrophage culture flask to neutralize the digestion solution, and transferring it to a centrifuge tube; centrifuging the solution in the centrifuge tube at room temperature for 3 minutes; and adding DMEM culture medium to the centrifuge tube after centrifugation to complete the macrophage digestion. This invention achieves high macrophage digestibility and low differentiation rate.

This application relates to the technical field of silicon wafer processing, specifically disclosing a pre-cleaning method for high-efficiency gettering in crystalline silicon heterojunction solar cells. This method includes steps such as pre-cleaning with a mixed acid solution, texturing, post-cleaning with a mixed acid solution and hydrofluoric acid, followed by phosphorus diffusion gettering treatment of the resulting silicon wafer. The mixed acid solution can micro-etch the silicon wafer surface to remove metallic impurities. During the micro-etching texturing process, the silicon wafer surface develops a pyramidal morphology, increasing the specific surface area and thus expanding the gettering area. Simultaneously, because the texturing process uses micro-etching to preserve the mechanically damaged areas on the silicon wafer surface, the combination of texturing and the mechanically damaged areas creates dual gettering centers in the subsequent gettering process. Even if the back side of the silicon wafer is not subjected to phosphorus diffusion gettering, the presence of the mechanically damaged areas on the back side can still achieve a good gettering effect, thereby enabling gettering on both the diffused surface and the non-diffused back side of the silicon wafer, improving the gettering efficiency.

The utility model provides an organic silicon fertilizer irrigation device for asparagus roots, which relates to the technical field of agricultural irrigation and comprises a stirring tank, a connecting pipe and a waterproof shell. The upper end of the stirring tank is provided with a storage tank, the stirring tank is provided with connectors, the outer side of the lower end of the stirring tank is provided with a fixing support, the lower end of the stirring tank is connected with a drainage pipe, the drainage pipe is provided with a filtering tank, the front side of the drainage pipe is connected with a fertilization pump, the fertilization pump is connected with a main pipe, and the main pipe is provided with four sets of sealing connectors. Positioning rods on two groups of elastic plates at the lower end of a T-shaped pipe correspond to positioning holes in the two sides of the center end of a positioning pipe, so that the height positions of the T-shaped pipe and a spray head can be changed, and the irrigation precision is improved; the organic silicon fertilizer solution is directly irrigated to the roots of the asparagus, and the problem that an existing organic silicon fertilizer irrigation device for the roots of the asparagus is prone to being affected by the planting environment in the using process is solved.