This article presents an advanced dental diagnostic instrument-the pre-pain sensation electric pulp tester with current indication. The tester adopts an alternating current signal generator with a specific frequency as the stim- ulating source which can induce a pre—pain sensation similar to a cool-sour feeling or tingling without causing any pain when the current flows through the patient's dental pulp.The dentist can judge the vitality of the dental pulp by the data displ.ayed on the tester.The tester is superior to other similar instruments both at home and abroad with its better accuracy and repeatability. This instrument adopts the integrated circuit and some other new techniques such as automatic boost,automatic switching on and off of the power and automatic data-holding. Compact,light and easy to operate it has high reliability,safety and low power consumption. At present,it is a more advanced dental electric pulp tester.

Objective: design knee prostheses infection modal for rabbits. Methods:The knee implants were designed with 3mm To Kirschner wire for the length of 15mm.Implanted the stem to the distal femoral through intercondylar fossa.forty eight rabbits were divided into 4 groups randomly,12 in each group and finished above-mentioned surgery. Immediately after the surgery,0.5 ml 1?107 CFU of Staphylococcus aureus ATCC 25923 was injected into the joints of group A,0.5 ml 1?106 CFU in group B and 0.5 ml 1?105 CFU in group C, group D were not injected.the animals were sacrificed 2 weeks after injections, wounds were observed and X-ray films were and taken. levels of serum CRP and ESR determined,pathological changes were observed and bacteria cultures were performed. Results: After staphylococcus aureus was injected into the joints right after the surgery.100% knee joint infection in group A and 100%in group B, 83.3% in group C,none knee joint infection in group D. A large amount of inflammatory cells were found in the infected samples, theand levels of serum CRP and ESR were elevated in the infected samples. Conclusion:An animal model of TKA infection can be established successfully at 2 weeks by 0.5 ml 1?106 CFU staphylococcus aureus ATCC25923 injecting into the joints immediately after the surgery.

In 1989 ,a general survey of diabetes mellitus and impaired glucose tolerance(IGT) in 44 747 Shanxi peasants,as well as Beijing and Liaoning workers and cadres revealed that the prevalence rate of diabetes and IGT was 2. 02% and 2. 95 % respectively. The former was greatly increased in comparison with that in 1979. The prevalences of diabetes and IGT in Beijing and Liaoning were much higher than in Shanxi, where the caloric-intake and the percentages of overweight and obesity in peasants were much lower. The prevalence rate of diabetes and IGT increased with age,with the peak in 60s. Most of patients with diabetes or IGT were non-obese, but it was significantly higher in overweight or obesity groups. These indicate that aging,lack of physical exercise,overeating and obesity are major factors in increasing the prevalence rate of diabetes mellitus and IGT. A significant difference in prevalence rate of diabetes between male and female was found. Its cause and significance need further study.

The toxioity of rivanol(home product)in animals was investigated according to the standard in Chinese Pharmacopoeia. Acute toxicity ,subacute toxicity and cumulative toxicity in mice,sensi-tization in guinea pigs and subchronic toxicity in dogs were tested. In acute toxicity test,the LD50 (IV)was 18. 494?2. 90mg/kg,which belonged to be a moderate toxic substances. When the dose was 1mg/kg,no toxic effect was observed in any animal. When the dose(IV)increased to 5mg/kg, mild degeneration and focal necrosis of cells,infiltration of inflammatory cells and proliferation of Kuffer'cells were shown in liver of mice while no toxic effect was observed in dogs. In cumulative toxicity test,the LD50 was 19. 3mg/kg which was more than Ld50 suggested that there was some tolerance and cumulative toxicity effect might not be present in mice. There was no sensitization showed in guinea pigs when rivanol was given via abdomenal administration.

Anti-HBs,HBeAg,Anti-HBcIgM weremeasured in 322 cases of HBsAgnegative hepatitis.It was foundthat 120 of which were positive forthose HBV infecting markres,indi-cating that the HBV infecting ratewas very high(37.3%)in HBsAgNegative hepatitis.The authorspointed out that for the diagnosisof HBV infection all the infectingmarkers mentioned above should beroutinely detected,especially forAnti-HBcIgM.

The influences of tbe two kinds ofserum on cryopreservation of lym-phocytes was examined with respectto the functional activities of therecovered cells,and highly reco-vered and viable cells were obtainedafter cryopreservation in the mediacontaining either human AB serumor new-born calf serum,The blastTransformation of the lymphocytesfrozen withAB serum was higherthan that with new-born calf serum,while(the new-born calf serum,wasof benefit to the stability of cellmembrane Secepeors and the forma-tion of rosettes.

TTH and DNP-BSA delayed hyper-sensitivity(DH)were transfered tononimmune human recipients withGoose derived transfer factor(TF-G)prepared from blood and spleen ofGoose immunized with TTH or DNP-BSA.Only human recipients injec—ted with immune TF-G showed DHskin reactivity by skin test.TTHDH response were only transferedby TTH specific TF-G but not DNPBSA specific TF-G and the DNP-BSAdermal reactivity could only be ob-served when DNP-BSA specific TF-G were employed.The fact that TF-G was able to tranfer donor specificDTH to human recipients suggestedthat there may be no absolute speciesbarriers for DTH transfer with TF.

In this paper,immunosuppression ofNK activity induced by(1)Human se-minal Plasma(HSP)and its Fraction-1 on sephadex G-100 in vitro;(2)in-travenous injection of HSP,Fraction-1 or mice sperm and(3)uptake of HSP,Fraction-1 or,mice sperm via rectalroute were studied.It has been pro-ved by our experiment that HSP,Fraction-1 and mice sperm possesspotent immunosuppressive effect interm of NK activity inhibition.Ascompared with intravenous injection,the immunosuppression induced byrectal exposure of HSP,Fraction-1or mice sperm is much stronger

Most of the luteinized unruptured follicle syndrome(LUFS)happens to women with menstrual disorders and is one of the important factors in "unexplained infertility". The mechanism of LUFS is still unknown. Using classic criteria, such as basal body temperature, serum progesterone, endomtrium biopsy and crystals of cervical mucous one can not distinguish the LUFS cycles from the ovulatory ones. There were low reports in our country in this aspect. In the reproductive endocrinology and infertility outpatient department we have found 2 cases of LUFS through ultrasound and laboratory findings. In this article, the pathophysiologic mechanism of this sydrome, its diagnostic method and index are discussed, and some problems concerning fertility and sterility are proposed.

The present study referred to the incorporation of 35S-sulfate into the chicken embryo cartilage stimulated by the serum from rats fed on the grain of the endemic areas of Kashin-Beck disease (KBD) and children with KBD using the cpm /mg cartilage as the indicator of serum sulfation factor (SF) activity. The SF activity in serum from KBD model rats was markedly reduced (161.5+66.8 n= 22), when compared with the controls (212.2+58.9,n = 22). The serum SF activity in KBD children (300.5+90.9,n = 22) was much lower than that in healthy controls (425.0 + 142.5, n = 22). The results suggest that in the endemic grains and/or environment there exists certain factors which interfere with the normal function of serum SF, the change of serum SF activity may be the key-point in the pathogenesis of KBD.