A L-arginine-producing mutant UN100-12(SG~(r),AE~(r)) was derived from Corynebacterium glutamicum ATCC138761 by combination treatment with ultraviolet(UV) and N-methyl-N-nitro-N-nitrosoguanidine(NTG). It could accumulate 16.6g/L L-arginine in the medium containing glucose as carbon source and ammonium sulfate as nitrogen source, when it was culrured at 30℃ for 4 days. And also this mutant has good stability of descendiblity of L-arginine.

Four compounds have been isolated from Sargassum fusiforme(HaTv. ) Setch. collected in the south Zhejiang province of China. Among these compounds the structures of three have been deduced as mannitol, fucosterol and saringosterol on the basis of chemical and IR,NMR,MS spectral data.

Through the questionnaire survey to three secondary-level health care workers and hospital patients in Northwest of Hubei we find that the doctor-patient relationship at the primary hospitals are,as is shown in the data,more harmonious than that in the bigger city hospitals. Analysis reveals that the geographical location,medical psychology,and the improvement in medical technology and rapid development of hospitals are the main reasons for this phenomenon.

0.05). The 1,3 and 5-year regional control and survival rates in both groups were concordant, demonstrating that the prognosis of these two groups was similar. The 5-year survival rate in pre-operative radiotherapy group was 37%. The results of retrospective analysis by Log-rank and Cox proportional regression methods demonstrated that whether the tumor resected or not were the major factors affecting pre-operative radiotherapy effect.

Objective To study the diagnosis and operation timing of acute mesenteric ischemia(AMI).Methods A retrospective analysis based on the clinical characteristics,the methods of diagnosis and treatment,and operative results of 21 patients with AMI admitted in our hospital from January 1997 to December 2007 was performed.Results The diagnosis were certified by color doppler ultrasonography in five cases,spiral CT in eleven cases,DSA in two cases,and abdominal exploration in three cases.One case was cured by anticoagulation /thrombolytic therapy;and one case was confirmed with selective vascular angiography and cured by urokinase perfusion via the catheter;after removing the thrombus followed by anticoagulation /thrombolytic via Fogarty balloon catheter,ischemia of intestine completely recovered in three cases,partial small bowel resection were performed in eight cases,"second-look" operation in two cases,and subtotal small bowel resection in six cases.Three cases developed short-gut syndrome and three cases died after operation.Conclusions Imageological examination is essential for diagnosis of doubtful cases of AMI,and adequate treatments and timely selection of operation are critical to attain early diagnosis and good results.

Objective:To acquire Chinese IL 18 mature peptide cDNA from adult PBMC,adult bone marrow cDNA libray,adult tonsil cDNA library,Embryonic cerebrum and cerebellum aged 3 months,Embryonic cerebrum and cerebellum aged 8 months.Methods:By RT PCR to aquire Chinese IL 18 mature peptide cDNA.Results:The six sequences of our seven species have basepair variation.Conclusion:The cDNA of Chinese IL 18 has polymorphism.

Local recurrences and distant metastases develop in patients with early stage NSCLC ( Non-small Cell Lung Cancer) after surgery. It becomes important to predict the prognosis and give postoperative adjuvant therapy if necessary. The advances of prognostic factors of early stage NSCLC are reviewed.

Objective To evaluate the effect of ginsenoside-Rg3 on cellular immune function of nasopharyngeal carcinoma patients with radiotherapy. Methods 50 nasopharyngeal carcinoma patients with radiotherapy were ran-domly divided into Rg3 group ( n=25 ) and control group ( n=25 ) . After the radiotherapy, the peripheral blood lymphocy of each group were collected. MTT method was used to detect lymphocyte proliferation. Lymphocyte sub-group was detected by Flow Cytometry/financal capacity model. IgG,IgM and Th1/Th2 cytokines was detected by ELISA. Results Ginsenoside Rg3 could promote the proliferation of lymphocytes in patients with nasopharyngeal carcinoma radiotherapy,upregulation of CD4 +,CD4 +/CD8 +,IgG,IgM,IL-2,downregulation of CD8 +,IL-6,and showed dose dependent. Conclusion Rg3 ginsenosides can significantly enhance the peripheral blood lymphocyte immune function of nasopharyngeal carcinoma patients with radiotherapy. Rg3 ginsenosides may be a potential im-mune immunosuppression caused by nasopharyngeal carcinoma radiotherapy enhancer antagonism.

Objective To investigate the effect of breviscapine on the proliferation and the expression of thrombin receptor mRNA of vascular smooth muscle cells (VSMCs) . Methods Rat thoracic aortic VSMCs cultivated in vitro were randomly assigned to control,breviscapine 0.5 μg/mL, 5 μg/mL and 50 μg/mL groups, The proliferation was induced by thrombin, The proliferative effect of VSMCs was measured by the3H-thymidine (3H-TdR) incorporation method; the expression intensity of thrombin receptor mRNA relative to β-actin mRNA was detected by reverse transcription polymerase chain reaction (RT-PCR). Results The incorporation rate (cpm/1. 5 × 105 cells) of3H-TdR were 1 216. 00±241.57,673.25±12.63,602.50±80.59, and 522.00±103.99 respectively in the control, and breviscapine 0. 5 μg/mL, 5 μg/mL and 50 μg/mL groups. As compared with the control group, the prolifera-tion of rat thoracic aortic VSMCs was inhibited significantly in all breviscapine groups (all P<0.05). RT-PCR showed that the expressions of thrombin receptor mRNA relative to β-actin mRNA were 0. 614, 0. 389, 0. 310, and 0. 280 respectively in the control, and breviscapine 0. 5μg/mL, 5μg/mL and 50 μg/mL groups, The expression ratios of TR/β-actin mRNA in thoracic aortic VSMCs in all the breviscapine groups were lower than those in the control group, which suggesting that the expression of thrombin receptor mRNA was inhibited. Conclusions Breviscapine inhibits the proliferation of rat VSMCs. Its mechanism may he associated with the inhibition of the thrombin receptor gene expression of VSMCs.

Objective To study anti-radiation behavior of plasma sprayed boron carbide coatings. Methods The anti-radiation capacity of 16Mn steel which was coated with 0.1 mm plasma sprayed boron carbide were studied. The irradiation beams were 6,10,15 MY X-ray and 6,9,12,15 MeV electron emitted by accelerator, X-ray emitted by 60Co machine,fast neutron, and X-ray emitted by kilovoltage X-ray ma-chine. Results Anti-radiation capacity of plasma sprayed boron carbide coatings was not found for X-ray beams emitted by accelerator and 60Co machine. For electron beams,the anti-radiation capacity were found. The deeper of location, the stronger was anti-radiation. However, the anti-radiation capacity was not good. For fast neutron,the anti-radiation capacity was good. For X-ray emitted by kilovoltage X-ray machine,the anti-radiation was good,and only 0.1 nun plasma sprayed boron carbide had 15% attenuation. Conclusions The plasma sprayed boron carbide coatings have the anti-radiation capacity for X-ray emitted by kilovoltage X-ray machine in medical field.