Based on the lethal rate, positive and negative mutation rate, the optimal doses of UV, HNO2, UV + AO treating S. hygroscopicus NND-52-29 were determined. The mutant strain A19 that was obtained showed the derepres-sive property to glucose and the nigericin yield of A19 could be increased by 128%. When it was subcultured combined with natural screening, its stability was rather satisfied.

Objective To construct a suppression subtractive hybridization (SSH) library of human renal cell carcinoma. Methods Poly A + RNA was isolated from human renal cell carcinoma (RCC) tissues and matched normal kidney tissues, respectively. Then double strand cDNA were synthesized and restricted by Rsa I.RCC cDNA were divided into two groups and ligated with either adaptor 1 or adaptor 2.After RCC cDNA hybridized with normal kidney cDNA twice and underwent nested PCR,the PCR products were cloned into pT Adv vector and transformed E.coli TOP10F′.Some positive clones randomly picked up were digested and sequenced. Results The SSH library contained 414 positive clones. Random analysis of 265 clones with enzyme restriction showed that 246 clones contained cDNA fragments which were distributed mainly between 300～900 bp. Among 40 arbitrary clones derived from the above 246 clones, No.170 clone is a previously unknown sequence and the other 39 clones were derived from 35 known genes. Conclusions The quality of the SSH library of human RCC is reliable and its construction would lay the foundation for further screening differentially expressed genes in RCC.

pcDNA3.1/Hygro(-)+pCMV?. Conclusions Transactivation competence of genotype B HBx was higher than that of genotype C HBx, while the antiproliferative and apoptosis effects of genotype B HBx was lower than of genotype C HBx. B and C genotype-specific functional differences of HBx may closely co-related with the pathogenicity of HBV.

Simultaneous concurrence of subacute thyroiditis and Graves' disease is rare.We present one case of subacute thyroiditis with Graves' disease and combine with other reports to explore the clinical characteristics and therapeutic considerations.If subacute thyroiditis is considered coexisting simultaneously with Graves' disease,radioactive iodine uptake,thyroid autoantibody,fine-needle aspiration of thyroid gland,thyroid nuclide imaging examination,etc,should be done to make correct diagnosis and to adjust the therapeutic plan.

Objective:To investigate the content rationality of antimicrobial agent thimerosal in chloramphenicol eye drops. Meth-ods:Chloramphenicol eye drops with thimerosal at different concentrations were prepared, and the antimicrobial activity was studied. Results:When the test solution contained 0. 02 mg·ml-1 thimerosal, the antimicrobial activity could achieve the requirement in the pharmacopoeia. Conclusion:Thimerosal at different concentrations in the commercial chloramphenicol eye drops all can reach the anti-microbial effect. However, the thimerosal concentration in some eye drops is unreasonably high, which should be reduced.

Objective To study image findings of nonossifying fibroma.Methods The pathological and image findings fo 22 cases of nonossifying fibromas proved by operation were analysed.There were 12 cases of male and 10 cases female,with age ranging from 10 to 35 years(mean age 17 years).X-ray plain films were obtained in all 22 cases,CT images in 7 cases,and MRI in 2 cases.Results The tumors were located in long bone in 19 cases,in which 14 cases were located in metaphyses,2 cases in diaphyses and 2 cases in bone end,and 4 cases in irregular bone,which was seen in clavicle,rib,illum and maxilla respectively.The tumor maximum diamneter ranged from 2 to 6.5 cm,with mean diameter of 3.2 cm,and the ratio of longitudinal to transverse diameter was 2.51.The tumors were round,oral or mild lobular in 17 cases.The tumors were showed sclerotic borders in 20 cases,and no sclerotic border in 2 cases(clavicle and rib).Septum was demonstrated in 19 cases.Bone expasion was showed in one case.Conclusion If a tumor is located in cortex or marrow of long or irregular bone which is showed a welldefined lytic lesion with sclerotic rim,the diagnosis of nonossifying fibroma will be considered.

BACKGROUND:The interaction of neural network and motor function in post-stroke brain tissue remains unclear.
OBJECTIVE:To observe neural network impairment fol owing subacute stroke by using diffusion tensor imaging, and to investigate the relationship with neurological defects and motor dysfunction.
METHODS:A total of 19 patients after subactue stroke and 20 healthy adults were examined with diffusion tensor imaging. The fol owing parameters were compared:fractional anisotropy, apparent diffusion coefficient, asymmetry indices of fractional anisotropy and apparent diffusion coefficient. The neurological defect and motor function were evaluated with the corresponding scales. The 10-meter walking speed was measured. The correlation of diffusion tensor imaging parameters with the scale scores and 10-meter walking speed was analyzed.
RESULTS AND CONCLUSION:The stroke group exhibited reduced fractional anisotropy value asymmetry and fractional anisotropy value in bilateral posterior limbs of the internal capsule. Apparent diffusion coefficient value asymmetry and apparent diffusion coefficient value in the posterior limb of the internal capsule were lower than control unaffected side (P<0.05). Apparent diffusion coefficient value and apparent diffusion coefficient value asymmetry in posterior limb of the internal capsule showed a strong negative correlation with Fugl-Meyer assessment scores of the lower extremities (P<0.05). Diffusion tensor imaging parameters is closely linked with motor dysfunction of the lower extremities in subacute stroke patients. Local stroke lesion-caused neurological defect is the leading cause of motor dysfunction of the lower extremities.

Objective To observe the effect of ephedrine combined propofol and fentanyl in painless induced abortion.Methods Eighty cases of patients (ASA Ⅰ) who apply painless induced abortion were randomly divided into two groups:observation group and control group,each group with 40 cases.Both of the groups were given fentanyl 1 μ g/kg and propofol 2 mg/kg with 2 mg/ml lidocaine; then observation group was given 0.08-0.15 mg/kg ephedrine according to the blood pressure.The heart rate,blood pressure and pulse oximetry (SpO2) of preinduction,3 min and 5 min after induction and 3 min after surgery and the recovery time was observed.Results There was no significant difference about heart rate,blood pressure and SpO2 preinduction,but there was significant difference on 3 min and 5 min after induction in control group in contrast to preinduction [(69.80 ± 7.08),(65.18 ± 5.16) times/min vs.(83.65 ± 8.12)times/min and (86.65 ± 8.60),(90.73 ± 8.35) mmHg (1 mmHg =0.133 kPa) vs.(128.45 ± 11.83) mmHg] (P ＜ 0.05),while observation group kept stable; there was no significant difference about SpO2 and recovery time in both groups.Conclusion It is safe and effective to use ephedrine combined propofol and fentanyl in painless induced abortion.

Objective Through the correlation study of fibroblast growth factor 23 (FGF-23) and chronic heart failure to investigate the pathogenesis of chronic heart failure and provide a new method for chronic heart failure diagnosis.Methods One hundred and twenty-eight chronic heart failure patients (chronic heart failure group) were involved in this study.According to the level of left ventricular ejection fraction (LVEF),they were divided into LVEF slightly lowing group (LVEF 40％-50％,50 patients),LVEF moderately lowing group (LVEF 30％-39％,35 patients),LVEF severely lowing group (LVEF ＜30％,43 patients).Fifty healthy people was as control group.The level of FGF-23,parathyroid hormone (PTH),creatinine (Cr),urea nitrogen (BUN),blood calcium,blood phosphorus,N-terminal pro-B-type natriuretic peptide (NT-proBNP) were detected.The patients in two groups were performed color Doppler ultrasonography.Results The level of FGF-23,blood phosphorus,PTH,left ventricular mass index (LVMI),NT-proBNP in chronic heart failure group were significantly higher than those in control group [68.44(55.85-94.73) ng/L,34.18(30.57-38.87) ng/L,(1.13 ± 0.13) mmol/L vs.(1.02± 0.12) mmol/L,(15.51 ± 3.99) ng/L vs.(9.97 ± 0.89) ng/L,(112.27 ± 52.02) g/m2 vs.(71.37 ± 12.95) g/m2,(6 265.3 ± 15 991.6) ng/L vs.(76.12 ± 51.80) ng/L](P ＜ 0.01).The level of blood calcium,glomerular filtration rate (GFR) in chronic heart failure group were significantly lower than those in control group [(2.28 ±0.16) mmol/L vs.(2.48 ±0.13) mmol/L,(78.28 ± 14.20) ml/ (min ·1.73 m2) vs.(85.03 ± 14.44)ml/ (min·1.73 m2)] (P ＜ 0.01).Spearman correlation analysis showed that FGF-23 had positive correlation with age (r =0.256,P ＜0.01),blood phosphorus (r =0.326,P ＜0.01),PTH (r =0.584,P ＜0.01),NT-proBNP (r =0.799,P ＜ 0.01),LVMI (r =0.540,P ＜ 0.01),and had negative correlation with blood calcium (r =-0.308,P ＜ 0.01),GFR(r =-0.527,P ＜ 0.01).The level of FGF-23 was increased when LVEF reduced.Conclusions It has significant correlation between the level of FGF-23 and the degree of chronic heart failure.It suggests that the level of FGF-23 can evaluate the myocardial systolic function and ventricular remodeling.

Objective: To study whether domestic chloramphenicol eye drops with different ethylparabenin content meet the re-quirements in Chinese Pharmacopoeia. Methods:Antimicrobial effect test was used to examine the antimicrobial effect of the different eye drops. Results:The antimicrobial effect of the eye drops was in compliance with the requirements in the pharmacopoeia. Conclu-sion:The ethylparabenin concentration in the eye drops is higher than necessary. Boric acid and borax not only can adjust pH, but also show antimicrobial effect.