9results about How to "Optimize experimental conditions" patented technology

The utility model provides a handheld micro-fluidic sample processing device. The handheld micro-fluidic sample processing device comprises a clamp upper plate, a gas circuit connecting plate, a joint sealing plate, a chip sealing plate, a micro-fluidic chip and a clamp lower plate which are sequentially stacked from top to bottom, the upper clamp plate is provided with a hollowed-out area used for being connected with the second positioning hole of the lower clamp plate. The gas circuit connecting plate is provided with a plurality of gas circuit connecting ports which are densely arranged and first positioning holes which are connected with the clamp lower plate; the joint sealing plate is provided with a joint connecting port corresponding to the gas path connecting port of the gas path connecting plate and a third positioning hole for fixing the chip sealing plate; the chip sealing plate is provided with a liquid storage tank which is arranged corresponding to the joint connecting port of the joint sealing plate; the micro-fluidic chip comprises a chip main body and a reaction substrate, and a chip positioning area for placing the micro-fluidic chip is arranged on the clamp lower plate. According to the utility model, the hardware cost is reduced, and various functional operations can be satisfied.

The invention discloses a preparation method of an iron-silicon-based composite soft magnetic powder core, which comprises the following steps: compounding and uniformly mixing iron-silicon-titanium powder and iron-silicon powder, and carrying out heat treatment in an air atmosphere; and then performing insulation coating on the surface of the magnetic powder by using a polyvinyl alcohol aqueous solution and a nano oxide, and performing compression molding and heat treatment to prepare the iron-silicon-based composite soft magnetic powder core. Compared with a conventional iron-silicon powder core, the iron-silicon-based composite soft magnetic powder core prepared through the method has the advantages that the direct-current bias performance under the condition of 100 Oe is higher than 76%, the volume loss Pcv under the conditions of 50 kHz and 100 mT is lower than 500 mW / cm < 3 >, and the loss performance is obviously improved.

The application discloses a method for intensifying a Passerini reaction based on a thin liquid film microreactor, and belongs to the technical field of process intensification of the Passerini reaction. In the method, a gas pipeline at an inlet section of the microreactor is extended into a pipeline of the microreactor, so that a uniform ultra-thin liquid film is formed on the inner wall of the pipeline, and alpha-acyloxyformamide can be synthesized efficiently and rapidly, and a pure product can be obtained by rotary evaporation. The method combines the advantages of the past methods, meets the requirements of high efficiency, rapidness, low cost and green chemistry, and can synthesize the product very simply and rapidly, thereby providing good experimental conditions for development of new molecules. Meanwhile, a continuous flow chemistry platform is built, thereby laying a foundation for subsequent industrial application.

The invention discloses a method for preparing L-proline through pressurized temperature oscillation crystallization in a water-ethanol system. The method comprises the following steps: adding an ethanol solution with the water content of 5-10v% and an L-proline raw material into a jacketed crystallization kettle, starting pressurizing and online particle size detection equipment, heating and stirring until the L-proline raw material is completely dissolved, and enabling the solution to reach a saturated state; performing linear cooling to 60-65 DEG C, closing a pressurizing valve, opening a crystal slurry tank valve, pressing L-proline crystal slurry into a crystallization kettle, growing the crystal, starting a cooling program, and cooling according to a function T2 (t) = T2i-{(t-120) / t2} 2 * (T2i-T2f), tlt; after 240min, cooling is carried out according to a function T3 (t) = T3i-{(t-240) / t3} 2 * (T3i-T3f), and the temperature is reduced according to 240lt; tlt; the time is 450 to 480 minutes; and when the temperature is reduced to the end point, growing crystals, filtering, washing and drying to obtain a crystallized product. The L-proline product prepared by the method is large in particle size, narrow in particle size distribution and relatively high in bulk density.

This invention discloses a digestion apparatus for determining the content of polyisoprene, comprising a steam generating flask, with a conduit connected to the top of the steam generating flask, and a Claisen inductor connected to the end of the conduit away from the steam generating flask. This digestion apparatus provides a reaction site through the steam generating flask, generating stable steam, which is then provided with a uniform heat source via a heating seat to accelerate sample digestion and prevent localized overheating. The steam is then introduced into the Claisen inductor via the conduit. The Claisen inductor enables multifunctional connections, preventing sample loss, improving reaction efficiency, providing safety protection, preventing harmful gas leakage, improving reaction control precision, and ensuring optimal experimental conditions. The digestion flask provides a sealed, high-temperature and high-pressure resistant reaction environment, promoting the complete decomposition of organic matter in the sample and ensuring reaction uniformity and safety.

This invention provides a siloxane ligand-protected Ag 40 Nanoclusters, their synthesis methods, and applications. This invention relates to Ag protected by siloxane ligands. 40 Nanoclusters are composed of RC≡C ‑ and (Ph 4 Si 4 O 8 ) 4‑ Ag protected by both ligands 40 Nanoclusters, with the molecular formula {Ag} 40 [(RC≡C) 8 (Ph 4 Si 4 O 8 ) 6 The silver nanoclusters synthesized in this invention have precise atoms and novel structures; the synthesis method is simple, easy to operate, mild under mild conditions, and the raw materials are readily available, making it potential for industrial and commercial production; the obtained silver nanoclusters exhibit superior fluorescence performance at low temperatures and have a long fluorescence lifetime, making them practically valuable in the field of fluorescent probes and worthy of market promotion.

The application discloses a kind of waste muds's thermal consolidation processing device, including detachable upper box, lower box, loading system, heating system, monitoring system, drainage system, automatic control device are equipped in box;Loading system includes the settlement plate for being arranged at the top of box and being movable up and down, power device for applying vertical load to settlement plate, screwing device for being arranged in lower box and being used to apply circumferential load to mud;Drainage system includes hollow transmission rod, and suction device is connected between screwing blade and lower box wall surface;Monitoring system includes displacement monitoring device, several pore pressure temperature integrated sensors;Automatic control device is used to control the operation of loading system and heating system according to pore pressure temperature integrated sensor value change.The application can realize integrated automatic efficient thermal consolidation, effectively improve consolidation efficiency and data accuracy and stability in consolidation process, achieve the purpose of stable and efficient consolidation treatment of waste mud.

The invention discloses a method for rapidly detecting chiral substances in white spirit and fermented grains and application, and belongs to the technical field of white spirit flavor analysis. The method specifically comprises the following steps: pre-treating a to-be-detected white spirit or fermented grain sample; the method comprises the following steps: constructing a multi-dimensional chromatographic detection system based on center cutting: adopting a polar column HP-INNOWAX with the specification of 60m * 0.32 mm * 0.5 mu m as a one-dimensional column, and connecting an FID (Flame Ionization Detector); the method comprises the following steps: adopting a low-heat capacity chiral chromatographic column LTM CP-Chirastil-Dex CB with the specification of 30m * 0.25 mm * 0.25 mu m as a two-dimensional column, and connecting the two-dimensional column with an MS (Murashige-Skoog) detector; and carrying out qualitative analysis on the chiral substances in the sample to be detected by adopting the constructed detection system. The technical scheme of the invention has the advantages of high accuracy and good reproducibility, provides a new technology for the quality control of the white spirit, and has important significance for improving the quality of the white spirit.

The invention discloses a multi-mode combustion experiment device for plasma combustion supporting. The multi-mode combustion experiment device comprises a laser incidence part, a combustion chamber and a material supply part. The laser incidence part is arranged at the top of the combustion chamber and used for guiding laser into the combustion chamber for ignition; the combustion chamber is composed of an end face connecting part and a combustion cavity, two symmetrical observation windows and a conduction window are formed in the outer wall of the combustion cavity, and the vertical face of the conduction window is perpendicular to the vertical faces of the observation windows. The material supply component is arranged at the bottom of the combustion chamber and used for guiding reactants into the combustion chamber. The material supply part is a water-gas balance box body or a material supply disc, and the water-gas balance box body can generate water vapor to create a water vapor environment required by an experiment. The experimental device has multiple experimental functions, dynamic or static combustion characteristics and influence factors of the metal fuel in different atmosphere environments with / without plasma injection can be better observed and researched, and powerful support is provided for research and innovation of multiple forms of plasma combustion-supporting technologies.