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In recent years, macroporous adsorption resin has been widely used in the purification and separation of natural medicine and effective components of Chinese materia medica, the purification of compound Chinese medicine preparations, the removal of harmful impurities due to the advantages of stable physical and chemical properties, high selectivity, strong adsorption capacity and easy elution, recyclable use and regeneration treatment, economic and environmental protection, convenient preparation molding and so on. By summarizing the preparation, properties, classification and working principle of macroporous adsorption resin, the influencing factors and purification process of Chinese materia medica components were reviewed. The purpose of this paper is to explore the important factors affecting the purification of Chinese materia medica components by macroporous adsorption resin, and provide reference for improving the purification effect of Chinese materia medica components.
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Objective:Through getting acknowledge of the High-voltage of medical linear accelerator, it makes it possible for the relative medical workers to do a quick reaction to the repairmen and maintenance to the accelerator, and to maintain the machine to a good performance efficiently. While through understanding the application situation and development of accelerator, we could do a better choice at the terms of choosing an accelerator for hospital which meet the basic requirements and accuracy.Methods: Using the block diagram to introduce the main part of High-voltage of medical linear accelerator, and especially introduce the charging pinciple of charging transformer and the charge and discharge of PFN. The accelerator plays a vital fuction at radiation therapy, and we introduce the accelerator application in various fields and the development situation of technology application.Results: It’s significant to know the working principle of High- voltage as it’s helpful to ensure whether the machine works normal or not and to diagnose faults in it.Conclusion: In addition, through understanding the application situation and the development of accelerator, we could choose an appropriate accelerator for our hospital.
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To study and master the basic structure and working principle of the PB840 ventilator, discuss the maintenance methods and accumulate the maintenance experience. To summarize the maintenance methods from maintenance cases. To Strengthen the maintenance of the PB840 ventilator and improve the security and efficiency.
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In order to raise the work efficiency in service and maintenance,the structure and working principle of the machine are analyzed on the basis of apprehending the main device MCU.Combining with the troubleshooting practice,it is stressed that the knowledge of hardware and software is meaningful to those medical electronic engineering personnel.
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This paper thoroughly expounds the structure,working principle,and maintenance methods of SDS-20 blood dialysis system.
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This paper introduces the working theory of PIAPC card of FJ2008P? radiation immunity arithmometer.
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This paper introduces the working principle and structure of a pneumatic tube system named Sumetzberger NW160.Common failures are also discussed.
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The structure and working principle of dual-source CT(DSCT) and its clinic application are expatiated.Many advantages are proved after the analysis and discussion and also after the validation of clinic application,such as higher temporal resolution for the imaging of cardiac and coronary artery to be finished without the influence of any heart rate,lower X-ray absorbing dose to offer more safe surrounding for the patients,higher special resolution and higher signal to noise of images to offer more reliable diagnostic tool,the technology of dual-energy is special in the examination and research of function and metabolize of human being.