Objective Antiaging effects of seal kidney on aged male rats have been studies. Methods: Reproduction system of male rat was damaged by CYP. After ig. seal kidney 30 days, the content of serum T, serum MDA and the activity of SOD were determined. The changes of histology of the testis were observed by microscope with the method of paraffin embedding and H-E staining. Results The contents of serum T not only in normal rat but also in reproduction system damaged rat were markedly enhanced. The function condition of leydig's cells in the testis was improved. The formation and development of spermatozoon were increased. The activity of serum SOD was remarkably raised , while the content of serum MDA was strikingly reduced. Conclusion Seal kidney has the notable antiaging effects.

Objective To explore the relationship between plasma 5-HT and patients with sudden deafness and the pathogenesis in sudden deafness.Methods 46 inpatients with sudden deafness as patient group,and 34 healthy as control group.They were determined the plasma 5-HT concentration by immunoradiometric assay,then statistics analysis,and investigated negative life events in one week before admission.Results There is significant difference in 5-HT concentration between two groups.In patient group,35 cases(76%) had anxiety,depression emotion and sleep disorder before attack.Conclusions The high level of the plasma 5-HT concentration is probably one of the mechanisms in the patients of sudden deafness.Whether there is relationship between plasma 5-HT concentration and the degree and prognosis of sudden deafness needs to be further studied.

Objeetive To discuss the correlation of creatinine reduction ratio(CRR2)from posttransplant day 1 to day 2 and early graft function recovery status after kidney transplantation. Methods Clinical data of 80 patients after renal transplantation from Jan 2005 to Mar 2007 were retrospectively analyzed.Patients were divided into three groups according to the post-operative serum creatinine level:53 patients within IGF group[cereatinine＜265.2 μmol/L by post-operative day(POD)no.5],14 patients within SGF group(creatinine＞265.2 μmol/L on POD no.5,but no need for dialysis),and 13 patients within DGF group(need for dialysis in the first week post-transplant).Then the value and 99%CI of CRRz of these three groups were calculated. Results The value of CRR2 of IGF,SGF and DGF was(46.8±14.6)%,(25.6±13.5)%and(0.7±17.7)%respectively.And CRR2 99%CI of IGF,SGF and DGF was 41%-52%,15%-36%and-14%-16 0A respectively.There was significant difference in the value of CRR2 among IGF,SGF and DGF group.So a criteria for early diagnosis of IGF,SGF and DGF by CRR2 99%C1 was established:IGF(CRR2≥40%),SGF (15%＜CRR2＜40%)and DGF(CRR2≤15%). Conclusion CRR2 has a good correlation with early graft function recovery after kidney transplantation,and can be used to predict the occurrence of SGF and DGF.

In this paper, the domestic and international demand and development trend of clinical diagnostic radionuclides are analyzed, and the medium and high-energy cyclotrons, adequate and systematic facilities, and preparation techniques required for the production of medical radionuclides based on solid targets are introduced. This paper focuses on the research and development carried out by some important medical institutions and scientific research institutes in China over the years in the aspects of medium and high-energy cyclotrons, beam transmission lines, high-power irradiation target stations and new medical isotope production processes etc. It also looks forward to some new directions for the development of medical radionuclides in China during the 14th Five-Year Plan period.

Objective To study the acute toxicity of tetrodotoxin to zebra fish. Methods The maximum non-lethal concentration (MNLC) and 10% lethal concentration (LC₁₀) determinations were used to assess the acute toxicity of tetrodotoxin. Results According to the simulation calculation of Origin 8.0 software, the MNLC was 8.62 µmol/L and 15.2 µmol/L for LC₁₀. Under the experimental conditions, tetrodotoxin at a concentration of 16.0 µmol/L and above induced pericardial edema and arrhythmia, leading to the death of zebra fish. The target organs for acute toxicity of tetrodotoxin were the heart and liver. The main manifestations were pericardial edema, arrhythmia, and delayed yolk sac absorption. The toxicity appeared at a concentration of 0.958 µmol/L. Conclusion Tetrodotoxin has heart and liver toxicity to zebra fish, and its toxicity is dose-dependent.