Objective To introduce a rapid spot test method for nitrite in water to meet the urgent need of nitrite monitoring during accidental pollution. Methods According to the drinking water legislation in Europe (threshold: 0.10 mg/L NO2-), a rapid spot test method for nitrite in water was established by using an optimized composition of reagent mixture and a binary positive/negative response, conducted as follows: a tablet of a mixture of solid reagents containing sulfanilamide, N-(1-naphthyl) ethylene diamine dihydrochloride and sodium chloride was put on a spot test plate of Teflon mould, then, a drop of 30%(V/V) HCl and a drop of water sample were added on the reagent material. Results Under these conditions, all the test samples containing ≥0.10 mg/L NO2- can produce a positive response of the characteristic red-purple color, whereas, the samples will produce a negative response when the level of NO2- was below the limit. The results of real water samples determined with this new method were confirmed by using the photometric method based on the use of the same reagents. Conclusion The method is simple, rapid , accurate, and suitable for field monitoring of nitrite in water.

Animals ; Humans ; Reproducibility of Results ; Selenium ; analysis ; Spectrometry, Fluorescence ; Spectrophotometry, Atomic

OBJECTIVE:To compare the efficacy and safety of Sodium hyaluronate versus Carbomer,Polyethylene glycol,To-bramycin and Dexamethasone in the treatment of glaucoma with cataract. METHODS:464 glaucoma patients with cataract were randomly divided into group A(116 cases),group B(116 cases),group C(116 cases)and group D(116 cases). All patients re-ceived intraocular lens implantation;1-1.5 cm to Tramycin and Dexamethasone eye ointment,3-5 times a day. Based on it,group A received 1-2 Sodium hyaluronate eye drops,4 times a day. Group B received 1 Carbomer eye drop,3-5 times a day. Group C re-ceived 1-2 Polyethylene glycol eye drops,3-5 times a day. Group D received Tobramycin and dexamethasone eye ointment,1-1.5 cm every times,1-3 times a day. They treated for 1 month. Clinical efficacy,recovery of visual acuity and ocular surface functions [dry eye symptom score,tear film break-up time(BUT),corneal fluorescein staining(CFS),basal tear secretion(SIt),ocular sur-face disease index(OSDI)] and the incidence of adverse reactions in all groups were observed. RESULTS:The total effective rate sorted,patients with visual acuity higher than 0.6,BUT,OSDI by group A>group B>group C>group D,with significant differenc-es (P<0.05). patients with visual acuity in 0.3-0.6,0.1-0.3 and lower than 0.1,drycye symptom score,CFS,SIt in group A was less than group B,which was less than group C and group D,with significant differences(P<0.05). The incidence of adverse re-actions in group A was lower than group B,C,D,with significant differences(P<0.05),but there was no significant difference in group B,C,D(P>0.05). CONCLUSIONS:Sodium hyaluronate shows superior efficacy and safety to Carbomer,Polyethylene glycol,Tobramycin and Dexamethasone in the treatment of glaucoma with cataract,it can significantly improve visual acuity and ocular surface function.

The balanced scorecard, a new performance management tool used by enterprises, transcends the traditional assessment method of measuring an enterprise only from the financial perspective and renders it possible to view an enterprise simultaneously from four perspectives: financial, customer, internal process, and learning and growth. The balanced scorecard, which can also be used in the medical and health field, enables the hospital to continuously improve performance so as to realize its vision and strategic goals. The paper gives an account of the concept, development steps and principles of the balanced scorecard and its application in hospital strategic management, thus identifying a new channel for hospital development.

Objective To study the significance of dissection and exposure of the recurrent laryngeal nerve(RLN) in thyroid surgery.Methods The clinical data of 1 082 patients who had undergone operations on thyroid were retrospectively reviewed.All cases were routinely operated with dissection and exposure of RLN.Results Six cases had injury of RLN(0.5%),3 cases showed parathyroid insufficiency(0.3%)and 2 cases had injury of the superior laryngeal nerve(0.2%) ofter operation.The incidence of operative complications in thyroid surgery was closely related with if exposure of the RLN.Conclusions Exposure of the recurrent laryngeal nerve is a key measure to decrease injury of parathyroids,superior laryngeal nerve and recurrent laryngeal nerve during thyroid surgery.

Objective To observe the effect of silencing the expression of ADM using RNA interfering technique on the expression ofβ-catenin and terminal differentiation of osteosarcoma cells.Methods After the intervention of 0 h,48 h and 72 h by ADM siRNA,we observed the change of distribution ofβ-catenin in F5M2 using immunocytochemistry staining.The expression levels of total and phosphorylatedβ-catenin and GSK3βwere detected by Western blot after the intervention by ADM siRNA.The F5 M2 cells treated with ADM siRNA were subjected to HE staining,alkaline phosphatase (ALP)assay and immunocytochemistry staining to investigate the biological effects of ADM siRNA on the morphology and terminal differentiation of F5M2 cells.Results After the intervention of 0 h,48 h and 72 h by ADM siRNA,the distribution ofβ-catenin was transferred from the cytoplasm to the nucleus.ADM siRNA downregulated the expression level of P-β-catenin and upregulated P-GSK3βdetected by Western blot.HE staining revealed that the configuration of F5M2 had undergone restorational changes similar to those of normal cells after ADM siRNA treatment.ALP assay and immunocytochemistry staining showed that the expression of the earlier and later molecular biomarkers of terminal differentiation,including ALP and osteocalcin were strongly positive.Conclusion Silencing the expression of ADM can activateβ-catenin to transfer to the nucleus from the cytoplasm,and induce osteosarcoma cells to make terminal differentiation through activatingβ-catenin signaling pathway.

Objective To study the effect and mechanism of Plantago depressa Willd. extract on rats with chronic nonbacterial prostatitis. Methods Sixty rats were divided into six groups randomly: normal control group, model control group, cernilton group, high-, medium- and low- dose Plantago depressa Willd. extract group, ten rats in each group. Chronic nonbacterial prostatitis rat model was established in the animals except of normal control group. Rats in the cernilton group were administrated with cernilton solution( 100 mg . kg-1 ) . High, middle and low dose Plantago depressa Willd. extract groups were given 150, 300 and 600 mg . kg-1 of Plantago depressa Willd. extract, respectively. The rats in the normal control and model control group were treated with the same volume of purified water.The administration was performed once every day, and lasted for three weeks.Effects of Plantago depressa Willd.extract on prostate index (PI), prostate specific antigen (PSA), tumor necrosis factorα ( TNF-α) , interleukin-1β ( IL-1β) , cycloxygenase 2 ( COX-2) , prostaglandin E2( PEG2 ) , transforming growth factor-β1( TGF-β1 ) , and connective tissue growth factor ( CTGF ) levels and pathological changes of prostate tissue in rats were observed. Results PI and PSA levels of the normal control group were(0.8±0.3)mg.g-1 and(106.5±10.6)pg.mL-1, respectively;those of the model control group were(2.2±0.2)mg.g-1 and(319.4±23.4)pg.mL-1 respectively;Those of the cernilton group were(1.6±0.3)mg.g-1 and(179.5±13.7)pg.mL-1 respectively;Those of the low-, medium- and high- dose Plantago depressa Willd.extract groups were(1.8±0.4),(1.3±0.3),(0.8±0.3)mg.g-1 and(263.4±28.6),(178.5±21.5), (143.5±12.9)pg.mL-1, respectively.Compared with the model control group, PI and PSA were significantly decreased(P<0.01) , TNF-α, IL-1β, COX-2, PEG2 , TGF-β1 and CTGF levels in the prostate tissues were decreased ( P<0. 01 ) , and inflammatory cell infiltration and fibrosis of prostate tissue was significantly alleviated in the model control group. Conclusion This study confirms Plantago depressa Willd.extract exerts effective therapeutical effect on chronic nonbacterial prostatitis in rats.

Objective To investigate the impact of triptolide (TP) on proliferation and apoptosis of imatanib resistant CML cell (K562/G01) and its regulating effect on Wnt/β3-catenin signal pathway.Methods A series of 10,20,40,and 80 nmol/L of triptolide were used in CML cells K562/G01 for 12,24,and 48 hours.The cell proliferation was detected with methyl thiazolyl tetrazolium (MTT) test.The apoptosis was assessed with flow cytometry (FCM).The mRNA expressions of breakpoint cluster region-c-abl (BCR-ABL),β-catenin and its down-stream targets Lef-1,and cyclinD1 were analyzed with real-time quantitative polymerase chain reaction (RT-PCR),respectively.Results Triptolide significantly inhibited K562/G01 cell growth ability and induced apoptosis in a dose-dependent manner.Mter being treated with 20,40 nmol/L TP for 24 hours,the cell growth inhibition rates were (22.62 ± 1.33) ％,and (51.41 ±1.39) ％,respectively.The late apuptosis rates were (6.91 ± 0.14) ％,and (7.64 ± 0.47) ％,respectively.Meanwhile,PCR data showed that the mRNA levels of BCR-ABL were decreased,compared to the control group,the mRNA levels of β-catenin,Lef-1,and cyclinD1 were also decreased obviously after treatment.Conclusions Our data indicated that the triptolide could inhibit the proliferation and induce the apoptosis of K562/G01,and the mechanism might be related to the blockade of Wnt/β-catenin signal pathway.

Objective: To compare the differences in gene expression between murine intestine intraepithelial lymphocytes (iIELs) and splenic T lymphocytes, establishing the cDNA subtractive library of iIELs, analyzing the iIELs special genes. Methods: The iIELs and splenic T lymphocytes were isolated by density gradient in Percoll and nylon column respectively. cDNA subtractive library of iIELs was established by improved subtractive hybridization. The cDNA was ligated with a different adaptor. After 2 rounds of hybridization and suppression PCR amplification, the PCR products were directly inserted into the plasmid vectors. The ESTs special for iIELs were screened by reverse Northern blot. Results: Fifty ESTs with obvious difference in the cDNA subtractive library of iIELs were screened. These ESTs were squenced and submitted to Genebank. The ESTs were analyzed through BLAST, and 14 genes special for iIELs were obtained. These genes were associated with the pattern recognition of pathogen, cytokine signal transduction and proteinase inhibitors. Conclusion: iIELs are important components of intestine natural immunity, it can recognize the conservative antigens of bacteria and can be affected by cytokines and proteinase inhibitors, leading to unique cellular behavior--more resting and less activation.

Objective: To investigate the effect of hypoxia/reoxygenation on endoplasmic reticulum stress in cultured neonatal rat cardiomyocytes. Methods: Neonatal rat cardiac myocytes in primary culture were exposed to hypoxia for 5.5 hours and subsequently reoxygenation for 2-24 hours. Western blot and RT- PCR were applied to monitor the expression change of GRP78(glucose regulated protein 78). 2-deoxy-D-glucose(2-DG) was the positive control of this study. Then Western blot and RT- PCR were used to examine the expression of GRP78. Results: Cell viability was decreased obviously after hypoxia/reoxygenation. Compared with untreated cells, the GRP78 content of the cells had increased significantly in the hypoxia/reoxygenation cells. The level of GRP78 protein and mRNA elevated from the points of 2 hours to 24 hours after reoxygenation, and increased most obviously at the point of 4 hours after reoxygenation.(4 hours: protein level 142% of the control, mRNA level 200%). 2-DG could induce the increasing expression of GRP78 in a concentration-dependent manner from 10-50 mmol/L. Conclusion: Hypoxia/reperfusion can induce endoplasmic reticulum stress in rat cardiomyocytes.