0.05).At post- operative 30 days and 90 days,ECD were(6.39?0.90)%,(6.54?1.24)% respectively in the torsional group and(13.17?1.78)%, (13.67?2.36)% respectively in the US group,the differences between two groups were statistically(P0.05).Conclusion The torsional mode may provide more effective lens re- moval with a lower level of phacoemulsification time and energy.It can reduce the ultrasound energy and the intraocular trauma.(Oph- thalmol CHN,2008,17:82-85)

OBJECTIVETo study the effects of aluminum citrate (AC), rare earth compounds (REC) and sodium selenite (SS) on the surface elements of chrysotile fibers and the inhibitory mechanisms of three compounds for chrysotile-induced biological activities.

METHODSAfter being soaked in 250, 500 and 1000 microg/ml aluminum citrate solutions, 125, 250, 500 and 1000 microg/ml mixed rare earths solutions or 125, 250, 500 and 1000 microg/ml sodium selenite solutions for 10 min or 1 hour, the fabrication and the levels of surface elements of chrysotile fibers were determined.

RESULTSAluminum citrate, mixed rare earths or sodium selenite all could be adsorbed by chrysotile fibers. After pretreatment of chrysotile fibers with aluminum citrate, mixed rare earths or sodium selenite solutions for 10 min or 1 hour, the corresponding elements or ion on the surface of chrysotile fibers increased with the increase of concentration of the solutions.

CONCLUSIONPretreatment of chrysotile with aluminum citrate, mixed rare earths or sodium selenite solutions can change the fabrication and the levels of surface elements of chrysotile fibers, and inhibit the biological activities of chrysotile by "sealing" some "active sites" on the surface of chrysotile fibers.

Asbestos, Serpentine ; chemistry ; toxicity ; Citric Acid ; chemistry ; Metals, Rare Earth ; chemistry ; Sodium Selenite ; chemistry

Carbon nanotubes/Au nanoparticles ( CNT/AuNP ) composite film was fabricated on glassy carbon electrode ( GCE) by first dropping CNTs on the electrode surface and then electrodeposition of AuNPs by multi-potential step. The antibody of microcystin-( leucine-arginine ) ( anti-MCLR ) was immobilized on the modified electrode surface through adsorption on AuNPs. Subsequently, bovine serum albumin ( BSA) was used to block the non-specific adsorption to obtain the immunosensor for MCLR assay. The immunosensor could effectively capture MCLR by the specific immunoreaction between the electrode surface-confined antibody and MCLR, followed by the attachment of the anti-MCLR HRP-labeled to form a sandwich-type system. The analysis of MCLR was performed based on the catalytic reaction of HRP toward the oxidation of hydroquinone ( QH2 ) by H2 O2 . Under the optimal experimental conditions, the peak current response increased linearly with the concentration of MCLR in the range of 0 . 50-12 μg/L with a detection limit of 0. 30 μg/L (S/N=3). The developed immunosensor was used to determine MCLR in real water samples, and the recoveries of standard addition experiments were in the range of 93 . 0%-108 . 5%, with the relative standard deviation of 3 . 8%-5 . 0%.

Abstract: Objective　To compare the mosquito trapping effect of BG-trap mosquito trap using carbon dioxide versus BG-lure attractant under filed conditions. Methods　In August and September 2020, two areas were set with a distance of 100 m. Two sites were set at each area, and one mosquito trap BG trap was set with a distance of 5 m. Each site was set with different flow of CO2 and different amount of BG-lure attractants. The BG-trap mosquito traps on the same area would exchange positions every other day. The mosquitoes captured by each mosquito trap was collected and classified. and the species, sex and number of mosquitoes captured were recorded and counted. Results　The densities of Aedes albopictus captured by BG+/CO2-and BG-/CO2+were 14 and 31, and that of Culex pipiens pallens were 2 and 16, respectively. The differences were statistically significant (Aedes albopictus, t=-2.675, P<0.05; Culex pipiens pallens, t=-4.873, P<0.05). With BG-lure attractant, the females of Aedes albopictus and Culex pipiens pallens in the CO2+group were 2.6 (25/9.5) and 12.0 (12 /1) times higher than those in the CO2-group, and the differences were statistically significant (female Aedes albopictus, t=-4.119, P<0.01; female Culex pipiens pallens, t=-4.592, P<0.01), suggesting that the most important attractant to female mosquitoes is CO2. With BG-lure attractant, the male Aedes albopictus in the CO2+ group was 3.0 (12/4) times higher than that in the CO2-group, and the difference was statistically significant (male Aedes albopictus, t=-3.284, P<0.01). Without BG-lure attractant, female Aedes albopictus and female Culex pipiens pallens in the CO2 + group were 1.8 (18 / 10) and 15.5 (15.5/1.0) times higher than those in the CO2-group, and the difference was statistically significant (female Aedes albopictus, t=-2.868, P<0.05; female Culex pipiens pallens, t=-5.259, P<0.05). Without BG-lure attractant, the male Aedes albopictus in the CO2+group was 2.0 (9.0/4.5) times higher than that in the CO2-group, with a statistically significant difference (t=-2.508, P<0.05). With CO2, Aedes albopictus and Culex pipiens pallens in the BG + attractant group were 1.4 (43.5/31) and 0.78 (12.5/16.0) times higher than those in the BG-attractant group, and the differences were not statistically significant (Aedes albopictus, t=-0.943, P>0.05 ; Culex pipiens pallens, t=0.709, P>0.05). Without CO2, Aedes albopictus and Culex pipiens pallens in the BG + attractant group were 1.0 (14/14) and 2.0 (2.0/1.0) times higher than those in the BG + attractant group, and the differences were not statistically significant (Aedes albopictus, t=-0.500, P>0.05; Culex pipiens pallens, t=-1.000, P>0.05). Without BG-lure attractant, the densities of female Aedes albopictus captured by adding 0, 1 and 2 parts of dry ice were 10, 17.5 and 18 respectively, and the difference was statistically significant among the three groups (F=3.942, P<0.05). The densities of female Culex pipiens pallens captured were 1, 13 and 18 respectively, and the difference was statistically significant among the three groups (F=13.881, P<0.05). However, there was no significant difference between the capture of female Aedes albopictus and female Culex pipiens pallens by adding 1 part of dry ice and 2 parts of dry ice (female Aedes albopictus, t=0.112, P>0.05; female Culex pipiens pallens, t=-0.540, P>0.05). Without CO2, 10, 10, 9.5 and 1, 1 and 1.5 female Aedes albopictus and Culex pipiens pallens were captured by adding 0, 1 and 2 portions of BG-lure attractants, respectively. There were no significant differences between the three groups (female Aedes albopictus, F=0.120, P>0.05; female Culex pipiens pallens, F=0.477, P>0.05). Conclusions　In the monitoring of BG-trap mosquito trap, the mosquito trapping effect of CO2 is better than that of BG-lure attractant. When the same monitoring effect is obtained, the use of CO2 (100 mL/min) can save the use cost.

Objective To explore the long-term outcomes of endoscopic submucosal dissection (ESD) of gastric GISTs.Methods Data of 25 patients with gastric stromal tumors,who underwent ESD,were reviewed in terms of clinical characteristics,histopathologic results,complications and long-term outcomes.Results Twenty-five patients underwent one-time complete removal of lesion, with a average tumor size of 3.0 cm (range,0.6 to 7.6 cm).The average time of operation was 65 minutes (range,15 to 154 minutes).one case was observed with intraoperative hemor-rhage of 200 mL blood,which was successfully managed by hemostatic forceps.Perforation with incidence rate of 16%occurred in 4 cases and was closed well with clips.Mucosal mechanical laceration of esophagus occurred in 1 case when the big tumor was taken out.The average length of hospi-talization was 7.3 days (range,4 to 21 days).A follow-up for 30 months (range,13 to 54 months) showed no tumor recurrence or metastasis. Conclusion ESD is an effective and safe endoscopic procedure to remove gastric GISTs for long-term outcomes in patients with no metastasis.

OBJECTIVETo observe therapeutic effect of scalp-acupuncture plus body-acupuncture on spastic cerebral palsy and its effects on bone density and blood trace elements Ca, Cu, Zn, and Fe in the children with spastic cerebral palsy.

METHODSEighty children of spastic cerebral palsy were randomly divided into an observation group and a control group, 40 cases in each group. The observation group were treated with scalp-acupuncture plus body-acupuncture combined with body therapy and performance therapy, and the control group with simple body therapy and performance therapy, once each day, for 3 courses, 30 days constituting one course. Changes of bone density and the trace elements were compared before and after treatment.

RESULTSThe total effective rate was 87.5% in the observation group and 67.5% in the control group with a significant difference between the two groups (P < 0.05); after treatment, the bone density and blood Ca, Cu, Zn and Fe contents in the two groups significantly increased (P < 0.05, P < 0.01) with the observation group being superior to the control group (P < 0.05, P < 0.01).

CONCLUSIONThe scalp-acupuncture plus body-acupuncture combined with body therapy and performance therapy can improve bone density and contents of trace elements in the children of spastic cerebral palsy, and has a definite therapeutic effect on spastic cerebral palsy.

Acupuncture Therapy ; methods ; Bone Density ; Cerebral Palsy ; metabolism ; therapy ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Male ; Medicine, Chinese Traditional ; Scalp ; Trace Elements ; blood

AIMThe changes of tissue inhibitor of metalloproteinase-4 (TIMP-4) expression in mouse ovary during pregnant and postpartum period were studied to investigate the role of TIMP-4 in corpus luteum (CL).

METHODSRT-PCR was used to deter mine the change of TIMP-4 mRNA and indirect immunofluorescence was used to observe the change of TIMP-4 protein. The expression of TIMP-4 mRNA was observed in various periods throughout the stage of pregnancy and postpartum day 1.

RESULTSThe expression of TIMP-4 was gradually enhanced from day 1 to day 8, reached a maximal expression at day 8, while decreased at day 11 and to the lowest level at postpartum day 1. Indirect immunofluorescence results further indicated that TIMP-4 protein was localized to CL and theca-intera cells in various periods throughout the pregnancy and postpartum day 1. In addition, the change pattern of TIMP-4 protein agreed with that of the TIMP-4 mRNA in pregnancy CL.

CONCLUSIONThe expression of TIMP-4 in mouse ovary during pregnancy and postpartum is in spatio-temporal pattern and it may be involved in the formation and function maintain of CL during pregnancy in mice.

Animals ; Female ; Mice ; Mice, Inbred Strains ; Ovary ; metabolism ; Postpartum Period ; Pregnancy ; RNA, Messenger ; genetics ; Tissue Inhibitor of Metalloproteinases ; metabolism

Objective To evaluate the influence of the mean corpuscular volume (MCV) in different ranges on PLT counts,provide the theoretical basis for making PLT counts review rules in laboratory.Methods From March 2016 to August 2016 in Xijing Hospital department of outpatient who perform complete blood cell count were randomly divided into 3 groups,MCV≤65 fl in A group,65 fl＜MCV≤70 fl in B group and 70 fl＜MCV≤75 fl in C group.The reference method (Coulter principle) compared with the fluorescence method,accuracy analysis of different monitoring methods of counting PLT.Results PLT I and PLT F count values in A group was (322.8± 109.1) × 109/L and (282.60± 100.5) × 109/L respectively,and there was significant differences between the two groups (t=6.799,P＜0.05).In B group,the count values was (305.7 ± 111.7)× 109/L and (304.8 ± 112.3)× 109/L respectively,and there was no differences between two groups.In C group,the count values was (292.2±84.4) × 109/L and (291.6±84.4) × 109/L respectively,and there was no differcnces between two groups neither.Conclusion When small red blood cells or blood cell debris present in blood circulation,MCV≤65 fl,the reference testing (Coulter principle)of platelets causes a false increase in platelet count.

OBJECTIVE: To explore the best time of intratympanic dexamethasone injection to treat sudden sensorineural hearing loss (SSNHL) as salvage therapy so that to improve the curative efficacy on sudden deafness at the utmost. METHOD: A total of 192 patients with SSNHL were included in this study, among whom 63 cases received the systemic steroid therapy throughout the study, while the other ones were treated with systemic steroid as initial treatment and were given intratympanic steroid administration as salvage treatment starting at different time point. The salvage treatment started on the 3rd day after the beginning of the initial treatment for 29 cases, on the 7th day for 38 cases, on the 14th day for 43 cases, and 1 month later for 19 cases. All the patients were followed up for 2 months. RESULT: The recovery rates and total effective rates showed no statistically significant difference between the patients received only systemic steroid therapy and the ones received intratympanic steroid administration on the 3rd, 7th day and 1 month later after the initial treatment. The recovery rate and total effective rate exhibited statistically significant difference between the patients received intratympanic steroid administration since the 14th day after the initial treatment and the ones received only systemic steroid therapy, with the numerical value of P 0. 037 and 0. 034, respectively. CONCLUSION (1) As an initial management plan, the curative effects. between the intratympanic steroid administration and the systemic steroid therapy were not significantly different. (2) As a salvage treatment, intratympanic steroid was a better choice for patients who have not completely recover from ISSNHL after failure of initial management with systemic steroid only. (3) The best time point of salvage treatment with intratympanic steroid was about 2 weeks after initial management with systemic steroid.
Hearing Loss, Sensorineural ; drug therapy ; Hearing Loss, Sudden ; drug therapy ; Humans ; Injection, Intratympanic ; Salvage Therapy ; Steroids ; therapeutic use ; Treatment Outcome ; Tympanic Membrane

Objective To evaluate the clinical significance of epithelial cellular adhesion molecule (Ep-CAM)expression in esophageal squamous cell carcinoma(SCC).Methods The Ep-CAM expression was immunohistochemically investigated in 70 normal esophageal mucosas,SCCs and 72 lymph nodes.Results Ep-CAM expression was observed in 94.3% of the tumors,but no expression in the normal mucosa.The Ep- CAM expression was not significantly different between different tumor scales and tumors invading depths,its expression level was relevant with the tumors differentiation and lymph node metastases(P