Objective To study the impact of temperature, light, nitrogen and phosphorus on growth and microcystin-LR production of Microcystis aeraginosa strain under laboratory conditions. Methods M.aeraginosa strain was cultivated in BG-11 medium. Growth was determined by counting cell, while microcystin-LR was analyzed by high-performance liquid chromatography. Results M.aeraginosa strain had a biggest growth rate at temperature of 25 ℃ and light intensity of 3 000 lx, while microcystin-LR production contents reached maximum at 20 ℃ and 5 000 lx respectively. Under the phosphorus-fixed condition, M. aeraginosa amount and mircrocystin-LR content increased by nitrogen concentration and reached the peak when the nitrogen concentration was 650.0 ?mol/L. But higher concentration of nitrogen could probably restrain the cell growth and toxin production. Under the nitrogen-fixed condition, M. aeraginosa strain grew slowly at phosphorus concentration of 1.43 ?mol/L, but had a higher growth rate when phosphorus concentration was 6.50 ?mol/L. No significant change was found with the increase of phosphorus concentration. And almost similar contents of microcystin-LR produced by M. aeraginosa were observed at different phosphorus concentrations. Positive correlations between total microcystin-LR concentrations and chlorophyll-a contents and M. aeraginosa cell densities were found. Conclusion The optimum conditions for growth and toxin production of M. aeraginosa are not the same. Phosphorus is a probable limitation nutrient factor, and a low concentration will satisfy the growth and toxin production of M. aeraginos. The N∶P atomic ratio at 100∶1 was determined as the optimum for growth and toxin production. The total microcystin-LR concentration can be forecasted by M. aeraginosa cell density or chlorophyll-a content.

In order to improve the traditional teaching method of the experiments,a kind of teaching mode “self-service teaching mode of biochemical experiments” with the character of original and modern thought is created. In turn the virtual instruments and experiments-monitoring system are designed by utilizing the computer technology.

Objective To investigate the influence of previous abdominopelvic surgery on gynecological laparoscopic operation.Methods A retrospective analysis of 3 283 cases of gynecological diseases by laparoscopic operation patients in Peking University First Hospital from 2007 January to 2012 December,among them,719(21.90％) patients with previous abdominopelvic surgery history (study Group),2 564 (78.10％) patients have no history of abdominopelvic surgery (control group).Study group 719 patients,previous operation times:one time in 525 cases,194 cases were multiple; previous operation:185 cases of gynecological surgery,305 cases of obstetric surgery,108 cases of general surgery,and 121 complex surgery (include at least two kinds of surgery) ;previous operative approach:650 cases laparotomy and 69 cases laparoscopy.Compared two groups of patients with abdominopelvic adhesion and the gynecologic laparoscopic operation situation,analyzed the influence of previous abdominopelvic surgery on abdominopelvic adhesionon and gynecological laparoscopic operation.Results The incidence of abdominopelvic adhesion in the patients with previous abdominopelvic surgery was 51.2％ (368/719),which was significantly higher than that of 8.2％ (211/2 564) in patients without previous abdominopelvic surgery (P＜0.01).But the study group score (median 3) and the degree of abdominopelvic adhesion [mild 49.7％ (183/368),moderate 36.1％ (133/368),severe 14.1％ (52/368)] compared with the control group score (median 2) and degree [mild 55.0％(116/211),moderate 25.6％(54/211),and severe 19.4％(41/211)] were no statistical difference (P=0.930,P=0.684).Super-umbilical primary trocar site were chosen more common in patients with previous abdominopelvic surgery (23.1％,166/719) was significantly higher than that in the control group (3.3％,85/2 564; P＜0.01).And the rate of conversion to laparotomy was 0.6％ (4/719)significantly more than the control groups(0.l％,2/2 564; P=0.023).Compared with other groups,patients with gynecological or complex surgery or multiple operation history presented more severe abdominopelvic adhesion both in the score and degree (P＜0.01).The rate of super-umbilical primary trocar site,hospitalization time,operation time and bleeding during operation in patients with multiple operation history were significantly higher than those with single operation history (P＜0.05) ; the rate of blood transfusion,postoperative complication and conversion to laparotomy showed no statistical difference between the two groups (P＞0.05).Conclusion The laparoscopic operation could be carried out successfully and safely in patients with a history of various abdominopelvic operations,but the conversion rate increases,for patients with a history of multiple operation because of pelvic adhesion increases the difficulty of the laparoscopic operatio

A method was developed for the quantification of human growth hormone ( hGH ) by protein purification and isotope dilution-high performance liquid chromatography mass spectrometry ( HPLC-IDMS ) . The hGH was purified and fractionated by fast protein liquid chromatography ( FPLC ) , then hGH molecular weight was accurately determined by Fourier transform ion cyclotron resonance mass spectrometer ( FTICR-MS). The purified hGH was hydrolyzed and the separation was performed on an KINETEX C18 column (150 mmí2 mm I. D. , 2. 6 μm) with water ( containing 0. 1% TFA) and acetonitrile isocratic solution as the mobile phase at a flow rate of 0 . 2 mL/min and 40℃. The electrospray source was operated in the positive ion mode, and monitored in the multiple reaction monitoring ( MRM) mode. The measured hGH molecular weight by FTICR-MS was only 0. 31 Da difference from theoretical value. Three amino ( proline, valine and phenylalanine) were clearly separated by isocratic elution within 5 min. Under the optimized conditions, the content of hGH was 186 . 80 μg/g with a RSD of 0 . 5%. The detection results of hGH in international comparison by this method were consistent with the reference value, which validated the feasibility of the established method. The developed method is simple, practical, accurate, reliable and reproducible, and can be used for the hGH quantitation of pure hGH CRM to provide reference for the routine detection of hGH.

Objective To summarize and discuss the diagnostic and treating experiences of chronic pancreatitis with mass in the head. Methods Eight patients of chronic pancreatitis with mass in the head who were misdiagnosised as carcinoma of head of pancreas were analyzed retrospectively in the past 10 years. Results All the patients exhibited abdominal pain,5 of whom were with jaundice and 3 with anorexia. All the patients were misdiagnosised as carcinoma of head of pancreas before the operation,but the pathology after operation indicated chronic pancreatitis. The pancreaticoduodenectomy was performed in 5 patients,the choledochojejunostomy in 2 patients,while the exploratory laparotomy in 1 patient. After the operations,the abdominal pain was relieved in 7 patients, while 2 patients who accepted pancreatoduodenectomy suffered from pancreatic fistula,1 of whom died in the end. Conclusion It’s hard to differentiate the chronic pancreatitis with mass in the head from the carcinoma of head of pancreas before operation. If the carcinoma of head of pancreas can’t be excluded during the operation,the pancreatoduodenectomy should be performed,while the duodenum-preserving total resection of the head of the pancreas or any intra-drainage operations should be done if chronic inflammation is found in the whole pancreas with a negative result of the biopsy of the pancreas through the needle aspiration.

Objective To investigate the relationship between pancreatic cancer and diabetes mellitus (DM). Methods Two hundreds and twenty patients with pancreatic cancer and 300 controls, who suffered from non-digestive tract, non-neoplastic or non-hormone-related disorders, were enrolled from 1997 to 2007. The incidence of diabetes between the two groups and the relationship between pancreatic cancer and diabetes were compared, pancreatic cancer patients with DM were compared with patients without DM for their gender, age, location and differentiate degree of the cancer. Results The incidence of DM in the two groups were 33.1% and 9.67%, respectively, and the difference was significant (P < 0.05). In the pancreatic cancer group, the proportion of patients with DM diagnosed within 2 years or for more than 10 years were 25.91% (57/73) and 3.18% (7/73), which were significant higher than those in the control group 6.0% (18/29) and 0.67% (2/29)) (χ2=46.15, P<0.01, 0R=6.07; χ2 =4.72, P<0.01, OR=4.90). In the pancreatic cancer group, the proportion of patients with DM diagnosed within 2～5 years or 5～10 years was not significant different when compared with that of the control group, and there was no significant difference in terms of gender, age and cancer location between the pancreatic cancer patients with DM and without DM. The majority of pancreatic cancer patients with DM had corpora mammillaria or well differentiated adenocarcinoma, and the majority of pancreatic cancer patients without DM had differentiated adenocarcinoma. Conclusions DM was closely related with pancreatic cancer and DM may be one of the presentations of pancreatic cancer, as well as a possible risk factor for the tumor.

OBJECTIVE:To establish quality control system by using modern scientific idea and advanced method in in?patient pharmacy.METHODS:Under the situation o f running authentication of ISO9001quality control system in our department,inpatient pharmacy should take the patients as focus to offer good and normative services to patients and clinical departments and continue to make our work better.RESULTS&CONCLUSION:Implementation of ISO9001quality control system has standardized the management of quality of inpatient pharmacy as well as increased the patients'satisfaction.And satisfactory social and economical benefits have been obtained and self-perfect and continuous improvement have been realized in the inpatient pharmacy.

Objective To observe the expressions ofα-catulin and E-cadherin in tongue squamous cell carcinoma (TSCC)tissue, and to explore their relationship with the occurrence and development of TSCC.Methods The expressions ofα-catulin and E-cadherin in 55 cases of TSCC tissue and 10 cases of normal tongue tissue were examined by immunohistochemistry SP method. The relationship between the expressions and the clinicopathological characteristics and the relevance of the expressions ofα-catulin and E-cadherin in TSCC tissue were analyzed.Results The positive expression rates ofα-catulin in TSCC tissue and normal tongue tissue were 69.09% and 20.00%,respectively,and there was difference between them (P<0.01).The expression ofα-catulin was correlated to the histological differentiation,clinical stage and lymph node metastases of TSCC (P<0.05).The positive expression rates of E-cadherin in TSCC tissue and normal tongue tissue were 38.18% and 80.00%,respectively, and there was significant difference between them (P< 0.01 ). The expression of E-cadherin was correlated to the clinical stage and lymph node metastases of TSCC (P<0.05 ). There was a negative correlation between the expressions ofα-catulin and E-cadherin in TSCC tissue (r=-0.466,P<0.01). Conclusion The expressions ofα-catulin and E-cadherin may be associated with the occurrence and development of TSCC,and they could be used as the parameters which predict the malignant degree and prognosis of TSCC.

Objective To evaluate the brain invasion in gliomas by diffusion tensor tractography(DTT).Methods Diffusion tensor imaging was preoperatively performed in 35 patients who histologically confirmed gliomas.13 of the 35 tumors were low-grade gliomas and 22 were high-grade gliomas. Then the spatial relationship between the lesions and white matter fiber tracts around tumor was analyzed. displacement, continuity and injured conditions of white matter fiber were observed. Results White matter fiber tract in all lesions could be observed clearly. Three patterns of white matter fibers involvement were identified:displaced,infiltrated and destructed. White matter fiber tracts around low-grade gliomas were primarily displaced ,but were mainly infiltrated and destructed around high-grade gliomas. Conclusion DTT was useful for showing white matter fiber tracts,observing the shape changes stereographically,and evaluating the relationship with gliomas in vivo.

ObjectiveTo study the single nucleotide polymorphisms(SNPs) in the ORF26 gene of HHV-8 in Kaposi's sarcoma(KS),and to assess their correlations with the clinical phenotype and mucosal invasion of KS.MethodsHHV-8 DNA was extracted with phenol-chloroform-isoamyl alcohol from paraffin-embedded tissue specimens obtained from 32 cases of KS(including 26 classic and 6 AIDS-related KS).The ORF26 gene of HHV-8 was amplified by nested-PCR followed by bidirectional sequencing.The software DNAStar and program Clustal W were used to assess the SNPs in the ORF26 gene.Statistical analysis was carried out by using the Fisher's exact probability test.ResultsHHV-8 DNA was detected in 30 of the 32 tissue specimens,and in all of the 6 AIDS-related specimens.The predominant SNPs were 981 T/C(n =12),1086 C/T(n =12) and 1139 A/C(n =12) in the ORF26 gene of the 30 strains of HHV-8.No significant difference was observed in the distribution of SNPs in ORF26 between different phenotypes of KS or between KS with and without mucosal invasion.ConclusionThe ORF26 SNPs of HHV-8 seem unrelated to the clinical phenotypes or mucosal invasion of KS.