Objective To evaluate the value of different methods of hormone measurement and image study before surgery.Methods We retro spectively reviewed 99 patients with insulinoma confirmed by pathological report after surgery in the PUMC Hospital from December 1989 to August 2005.Results The main clinical manifestations were hypoglycemia coma,weight gain,perspiration,disorientation,hypomnesis,and dizziness.The sensitivity of diagnosis of insulinoma with fasting blood-glucose less than 2.78 mmol/L was 66.6%.The ratio of serum insulin to blood-glucose greater than 0.3 when hypoglycemia attacks was 90% sensitive.The sensitivity of perfusion CT was highest which was 100%.Conclusion Typical “Whipple's triad” and the ratio of serum insulin to blood-glucose greater than 0.3 when hypoglycemia attacks are best for the qualitative diagnosis of insulinoma.Perfusion CT has the best sensitivity and specificity among image studies currently used.

Objective To evaluate factors which maintain the stability of the ankle, and discuss indications for trans-syndesmotic fixation. Methods 12 freshly-frozen cadaver legs amputated below the knee were collected and divided into 2 groups. An ankle fracture model of unconstrained pronation-external rotation was then designed. Group A simulated the injury combined with medial malleolus fracture, and Group B the injury combined with deltoid tear. Ligaments were cut off sequentially to simulate the increasing severity of the injury. Fuji super low-pressure sensitive films and displacement transducers were used to measure the contact area of the tibiotalar articular surface and the width of the syndesmosis. The data were analyzed with SPSS to analyze the relationship of ligament injury and ankle stability. Results In Group A, the articular contact area and the syndesmotic width after section of the deltoid were significantly different from those before the section (P

Objective To investigate the oxalate-degrading and growth abilities of lactic acid bacteria coming from yoghourt in vitro culture broth. Methods The species of lactic acid bacteria obtained from 6 brands of yoghourt were identified. Different brands of yoghourt were separately cultured in broth and incubated at 37 ℃,5% CO2 for 48 h, getting the concentration of lactic acid bacteria through slab counting method. The brand of yoghourt with the highest quantity of bacteria was chosen as the study subject. Three species of bacteria and the mixture bacteria obtained from the chosen brand of yoghourt were cultured separately for 72 h in MRS broth which contained three different concentrations of ammonium oxalate, and the broth without inoculating of bacterium was prepared as control. The amount of bacteria in culture was detected, the concentration of ammonium oxalate was detected through photometric determination of oxalic acid by its catalytic reaction of methyl red by potassium chromate. Results Three species of lactic acid bacteria (L.bulgaria, L.acidophilus and L.thermophilus) were detected in each brand of yoghourt. The quantity of bacteria in Weiquan yoghourt is the highest. After 72 h incubation, the concentrations of oxalate in all the broths containing bacteria were lower than those in the control. L.acidophilus showed the best degrading activity. The higher the concentration of oxalate was, the bigger the amount of oxalate degraded was, the smaller the percent of degrading was, and the less the growth ability of bacteria was. Conclusion All the species coming from yoghourt have the ability of oxalate degrading, which increases with the concentration of oxalate in culture.But the high concentration of oxalate restrains the growth of bacteria.

Quorum sensing is defined as the cell density-dependent regulation of gene expression, and the involved system is the quorum sensing system, in which N-acyl homoserine lactone is known as the signal molecules of most gram-negative organisms. It can regulate diverse physiological functions. This paper reviewed the quorum sensing systems and the recent advances which play a major role in the formation of the symbiosis between the rhizobia and their host plants.

A new method using on-line cleanup technology combined with liquid chromatography tandem mass spectrometry ( UHPLC-MS/MS) was developed for the determination of seven kinds of β2-agonists residues, Formoterol, Salmeterol, Carbuterol, Clenisopenterol, Clenpenterol, Clencyclohexerol and Clenbuterol-hydroxymethyl in livestock manure. The sample was sufficiently extracted by acidic acetonitrile and diluted by 0. 2% formic acid. The extract was online purified on HyperSep Retain CX column where the sample matrix was washed away and the analytes were retained. The analytes were eluted into Hypersil Gold C18 column by 2% Ammonia-methanol solution. The seven β2-agonists were detected in selected reaction monitoring ( SRM) mode via positive electrospray ionization ( ESI+) by liquid chromatography-tandem mass spectrometry. The results showed good linearity correlation coefficients over 0 . 9928 for the seven kinds of β2-agonists in 0 . 5-100 μg/L concentration range. The LOD of seven kinds of β2-agonists in livestock mature is 1 μg/kg, while the LOQ is 5 μg/kg. When 5-50 μg/kg of the seven kinds ofβ2-agonists were added into the blank livestock manure, an average recovery of 67% -112% was obtained with the relative standard deviations of 2. 9%-10. 2%. The method is simple, rapid and has good reproducibility for quantitative and confirmatory analysis ofβ2-agonist residues.

OBJECTIVE Inflammatory myofibroblastic tumor(IMT) is a rare lesion of unknown etiology which was first described in the lung. The clinical and pathologic characteristics,treatment, prognosis of IMT in head and neck were discussed. METHODS The clinical data of 4 cases of IMT were analyzed retrospectively. The specimens of the 4 cases were prepared for immunohistochemical staining and light microscopy. RESULTS The patients included 3 males and 1 female. Their age ranged from 32 to 58 years. The tumors located at the true vocal cord in 2 cases, at the nasal cavity and maxillary sinus in 1 case, at the maxillary sinus in 1 case. Histological examination was found that the tumors consisted of spindle cells,chronic inflammatory cells and myxoid background with delicate vasculature. Immunohistochemical staining demonstrated that the SMActin and Vimentin were expressed positively in the tumor. The patients were followed up for 9 to 21 months after operation. Three patients were alive with no evidence of diseases, one patients recurred at 4 months after operation and were alive with IMT. CONCLUSION IMT is a true neoplasm with a potential of local recurrence. The main treatment of IMT is to resect the lesions thoroughly.

Objective To understand the level of urinary iodine of schoolchildren and salt iodine content of their families in a primary school and to analysis influence between salt iodine content and urinary iodine level in Haimen City,Jiangsu Province.Methods A cross-sectional study was conducted in a primary school of Haimen City in 2012.With the method of stratified cluster sampling,all students aged 9 ～ 12 were extracted in grades 3-5,urine samples and salt samples of their family were collected.Urinary iodine and salt iodine were determined according to Method for Determination of Iodine in Urine by As3+-Ce4+ Catalytic Spectrophotometry (WS/T 107-2006) and Direct Titration of Universal Test method in Salt Industry (GB/T 13025.7-1999).Results Totally,452 students from grades 3-5,including 233 boys and 219 girls were selected by cluster-stratified sampling.The median of children's urinary iodine was 231.90 μg/L,while the median of boys and girls was 235.40 and 222.60 μg/L,respectively.The median of urinary iodine of 9,10,11 and 12 year old students was 253.65,195.70,236.40 and 241.70 μg/L,respectively.The proportion of less than 100 μg/L and ≥300 μg/L was 7.7％ (35/452) and 27.7％ (125/452),respectively.There were no significant differences between different gender and age students.Among the 452 salt samples collected the median of salt iodine was 27.50 mg/kg.The coverage rate of iodized salt,the qualified rate of iodized salt and the intake rate of qualified iodized salt were 98.9％ (447/452),95.1％ (425/447) and 94.0％ (425/452),respectively.After consumptionn of non-iodized salt (＜ 5 mg/kg),unqualified iodized salt(5 ～ ＜ 20 mg/kg or ＞ 50 mg/kg) or qualified iodized salt [(35 ± 15)mg/kg],the median of urinary iodine of children was 177.30,211.95 and 232.90 μg/L,respectively.Correlation analysis showed that there was no relationship between iodine content of salt and urinary iodine level of schoolchildren (r =0.085,P ＞ 0.05).Conclusions Current nutritional level of schoolchildren in Haimen City is higher than the appropriate amount.Household salt iodine content of edible salt does not affect urinary iodine level of the children significantly.

Objective To compare clinical efficacy between microendoscopic discectomy (MED) and open discectomy (OD) in the treatment of patients with lumber intervertebral disc herniation (LIDH).Methods 116 cases of LIDH who were given surgical treatment were selected as research subjects to retrospectively analyze their clinical data.Then,these cases were divided into MED group (n=54) and OD group (n=62) according to operation type.The curative efficacy,operation situation and incidence of complications were compared.Results All patients' operations were successful.After the one-year follow-up,the MED group had an excellent and good rate of 96.3％,which was statistically same with that of 93.5％ in the OD group (P ＞0.05) In comparison with the OD group,MED group had a statistically shorter operation time,less bleeding volume in the operation,shorter length of incision and shorter rest time on bed after operation (all P＜0.05).After operation,there's no case of severe complication,and the incidence of complications between the two groups was statistically same (P＞0.05) Conclusions MED and OD are both effective operations for LIDH,which have high excellent and good rate.But in comparison with OD,MED has advantages of less damage and faster recovery.

To determine the residue of 14 sulfonamides in milk, a high performance liquid chromatography-tandem mass spectrometry ( HPLC-MS/MS ) method with on-line soild phase extraction ( SPE ) in cation exchange mode was established. 5 g of milk was extracted with 15 mL acetonitrile. Then the extraction was evaporated by 50 ℃ nitrogen and dissolved by 1. 00 mL 0. 2% formic acid. The dissolution was enriched and purified by MS/MS cation exchange on-line SPE column on a double ternary liquid chromatography, and eluted by the mixed solution of 2% ammonia methanol and 0. 2% formic acid (50:50, V/V). The compounds were separated by an octadecyl silica bonded column and determined by the tandem mass spectrometry. The results showed that the linearity of 14 sulfonamides was good in the range of 0 . 1–10 μg/kg ( r≥0 . 9995 ) .
The LOD of the method was 0. 05 μg/kg, while the LOQ was 0. 1 μg/kg. The recoveries of the 14 sulfonamides were in the range of 60 %-90 %, while the inter-batch and intra-batch RSDs were all lower than 10%. The method was proved to be more convenient, economical and stable than the traditional SPE column method.

Incision of the spinal cord (myelotomy) after spinal cord injury (SCI) is a surgical treatment which is mainly performed within 24 hours after SCI. However, many patients are fi rst seen outside the established time window of 24 hours. Furthermore, little attention has been given to its effi cacy and mechanism after 24 hours. In this study, dorsal longitudinal incision of spinal cord on SCI rats was performed at 72 hours after SCI to remove the liquefi ed necrotic gray matter. The results indicated that after myelotomy, locomotor function of hindlimbs signifi cantly improved from 21st day after SCI. There was also increased residual white matter area at the rostral and caudal segments to the injury center when examined at day 42 after the injury. These results suggested that myelotomy at 72 hours after injury has protective effect on the spinal cord.