1 case of intraductal papilloma of parotid gland was analyzed by means of clinicopathologic data,hematoxylin-eosin and immuno-histochemical staining.Combined with the relevant literature,clinical pathological features,diagnosis and treatment of the salivary gland intra-ductal papilloma were discussed.

Most content of pathophysiology is built by black-box method.Pathophysiology learning is a process from black-box to grey box and white-box.Therefore,black-box teaching method is a good way to train students efficiently and rapidly.It fits pathophysiology education wel1.During teaching of pathophysilogical theory and experimental classes,we should carefully design various black-boxes,and introduce students try to resolve the black-box problems,so as to interest students in pathophysiology and train them the capability to analyse and resolve problems.

Acute Disease ; Adolescent ; Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Toluene ; poisoning ; Xylenes ; poisoning ; Young Adult

Objective To explore the characteristics of MR perfusion imaging in normal pancreas and pancreatic cancer.Methods 20 cases of normal pancreas(without pancreatic diseases)and 20 cases with pancreatic cancer,underwent MR perfusion imaging using PHILIPS 1.5T unit with T1WI 3DFFE.12?4 collimation, 4 mm slice thickness ,20ml Gadopentetic Acid Dimeglumine 0.5mmol/ml Magnevist were used, the flow rate was 3.5 ml/s with a power injection,5 seconds delay,and data acquisition lasted for 90 seconds.These data were processed on a View Forum workstation using MR Brest Imaging(in Qualitity Analysis)software package ,and the mean maximum relative enhancement,wash in rate, wash out rate, time to peak, time of arrival and area under the curve were measured and statistically analyzed.Results The data of perfusion imaging in normal pancreas and carcinous pancreas were as followed respectively:maximum relative enhancement 95.69% and 50.74%,wash in rate 19.511/s and 4.471/s,wash out rate 26.051/s and 19.151/s,time to peak 31.33 s and 106.84 s,time of arrival 20.53 s and 64.70 s,area under the curve 15924.56 ml/(min? kg) and 5542.85 ml/(min ?kg).t-test showed that the difference of the perfusion data between normal pancreas and carcinous pancreas were significant(P

By reshaping the cornea without the creation of a stromal flap, excimer laser corneal surface ablation eliminates flap-related complications and avoids the risk of ectasia that may occur after laser assisted in situ keratomileusis ( LASIK ) . Post-operative pain is one of the most significant disadvantages of surface ablation and thus the management of pain and discomfort following surface ablation is of great importance. We summarize mechanism of corneal pain and current approaches to pain management after surface ablation.

Objective To explore the effects of different period of insulin-like growth factor-1(IGF-1)on B cell lymphoma/leukeamia-2 gene(BCL-2)and BCL-2 associated X protein(BAX)of myocard in mice with viral myocarditis.Methods Male Balb/c mice were randomly divided into control group,coxsackie viral B3(CVB3)infection group(infection group),IGF-1-treated group in earlier stage(0-6 d)and acute stage(7-13 d),injected IGF-1 of exogenous in abdominal cavity [30 ?g/(kg?d)].Animals were killed at the 14 day.The immunohistochemical studies and medical imagine analysis system were performed to evaluate the expression of BCL-2 and BAX in myocardial tissue.Results In infection group,the expression of BCL-2 reduced and BAX increased than those of control and treatment group(Pa

The Fe-N-C composite catalyst was prepared by the thermal decomposition of the chelate precursors based on Fe central ions and o-phenylenediamine ligands.It was observed from the scanning electron microscopy that the crumpled carbon micro-and nano-sheets were intertwined to form a free-standing tremella-like 3D structure.The N2 adsorption/desorption experiments revealed that the composite contained ample micro-and meso-pores and had a specific surface area of 290 m2/g.Graphitic C and multi-crystal Fe3C as main components were confirmed by the X-ray diffraction, and N-doping in the general form of graphite N and pyridine N was also verified by X-ray photoelectron spectroscopy.The electrochemical measurement showed that the tremella-like Fe-N-C composite catalyzed oxygen reduction through a four-electron path in an alkaline solution, and its activity was comparable to the commercial Pt/C catalyst.After 2000 cycles, the limited current density of the Fe-N-C catalytic electrode only decreased less than 5%, and the half-wave potential shift negatively 5 mV, which suggested that the Fe-N-C composite catalyst had better catalytic stability than the commercially used Pt/C catalyst.

This paper introduces the working principle of the blood circle treatment system outside the body. A monitoring instrument of plasma leakage suited for the blood circle treatment system outside the body is developed based on the absorption spectrum experiments of plasma leakage. Photoelectric detection technology and virtual instrumentation are utilized in the development. A series of detecting experiments of waste solution containing plasma with continuously changing concentration show the monitoring system possesses a relatively high sensitivity. Moreover, the experiments of continual detection with plasma concentration at one certain point indicate the monitoring system has a quite good stability. The monitoring instrument is adapted to dynamically detecting the plasma leakage when the blood circle treatment system outside the body is working.

Biosurfactant is a high surface active agent synthesized by microorganism Compared with chemical surfactant, biosurfactant has a low toxicity to ecological system of Earth So biosurfactant is gradually applied to many aspects of environmental pollution control A review is made from several aspects: screening of biosurfactant producing microorganism, optimization of culture brooth, isolation of biosurfactant et al In addition, on the foundation of the analysis, several suggestions about the development of biosurfactant are proposed in the end

Objective To explore the acute toxicity and LD 50 of Tripterygium Hypoglaucum (Levl) Hutch(THH) solution to provide information for safe clinical application. Methods After oral administration of THH solution in mice, the mortality and the physiological and pathological changes were observed. Results The LD 50 (95% confidence limit) of THH in male and female mice was 79 g/kg(69～89 g/kg) and 100 g/kg (90～112 g/kg), respectively. No marked pathological change of the organs was found. Conclusion According to the standard of grading of acute toxicity, THH solution belongs to the moderate class. Therefore, it is safe in clinical practice and has a wide application.