Objective To assess the result of the sanitary clearance of Huaneng Qiaoqi reservoir bottom.Methods According to related standards and regulations,the sanitary clearance of Huaneng Qiaoqi reservoir bottom was conducted and the result was assessed in Oct.2006.Results 14 360 m~2 farm,417 excrement pits,390 latrines,1 599 graves were sanitarily cleaned. Deratization was carried out in reservoir bottom with Chinese area of 4 878 mu,rat density met the standard(

Objective To compare the safety,effectiveness and predictability of laser in situ keratomileusis (LASIK) with fem- tosecond laser (IntraLase) and mechanical microkeratome (Moria M2,head 90?m).Design Prospective clinical study.Participant 148 patients (274 eyes) with high myopia received operation of LASIK.Method The patients were assigned to receiving LASIK with corneal flap creation by Intralase femtosecond laser (134 eyes of 76 patients) or Moria 90 keratome (140 eyes of 72 patients),both groups receiving eximer laser ablation with VISX Star S4.Followed-up examinations such as visual acuity,refraction,wavefront aberra- tion,etc.were scheduled for 1 day,1 week,1 month and 3 months postoperatively.Main Outcome Measures Visual acuity,refrac- tion,wavefront aberration,Schirmer test and tear film breakup time(BUT).Results At 3 months after operation,108 eyes (80.6%) of IntraLase group had UCVA better than or equal to BSCVA preoperatively,showing no statistically significant difference to microker- atome group (116 eyes,82.9%,P=0.642).The mean residual spheroequivalent of refraction of IntraLase group was -0.49?0.70D,show- ing no statistically significant difference to microkeratome group (-0.56?0.83D,P=0.448).The mean Schirmer test of Intralase group was 9.5?4.0mm,showing no statistically significant difference to microkeratome group (9.5?7.2mm,P=0.950).The mean BUT of IntraLase group was 7.9?4.3s,showing no statistically significant difference to microkeratome group (8.08?5.48s,P=0.869).The postoperative higher-order aberrations of the IntraLase group was 0.480?0.133?m,lower than that of microkeratome group (0.578?0.169?m,P=0.034). Conclusions Thin-flap LASIK with femtosecond laser and mechanical keratome flap creation are both safe,effective for the correction of high myopia,showing good predictability and stability.Femtosecond laser has slightly better clinical outcomes than microkeratome.

Objective To investigate the influencing factors for eye cyclotorsion and pupil centroid shift during LASIK.Design Non-controlled retrospective case series.Participant 131 patients (262 eyes) with myopia received bilateral LASIK.Methods Eye cy- clotorsion and pupil centroid shift were measured with Custom Vue~(TM) software during operation and compared with age,gender,right or left eye,flap-making method,spherical equivalent (SE),pupil diameter before and during operation.Main Outcome Measures The de- gree of eye cyclotorsion and distance of pupil centroid shift during LASIK.Results The mean eye cyclotorsion during LASIK was 3.07??2.07?(0?-8.6?).The mean pupil centroid shift was 0.33?0.14 mm (0.04-0.51 mm).The eye cyclotorsion was relevant to preoperative pupil size,difference of pupil size before and during operation,and preoperative SE (r=0.188,0.156,0.130,all P7.0 mm was higher than that of with pupil diameter≤7.0mm (3.35??2.17?,2.71??1.89?,P=-0.014).Pupil centroid shift was higher in fight eyes than that in left eyes (0.39?0.12 mm,0.28?0.13 mm,P=0.000).Conclu- sion Eye cyclotorsion and pupil centroid shift during LASIK can be measured with Custom Vue~(TM) system.The eye cyclotorsion may be influenced by the preoperative pupil size.The pupil centroid during LASIK was more significant in the right eyes than in the left eyes.

Objective To compare differential diagnostic value of narrow-band imaging (NBI) magnifying endoscopy and magnifying chromoendoscopy.Methods A total of 92 lesions from 75 patients were examined with conventional colonoscopy,NBI magnifying endoscopy and magnifying chromoendoscopy to evaluate pit patterns and vascular morphology patterns.Endoscopic findings were compared with the pathological results.Results The detection rate of conventional endoscopy,NBI magnifying endoscopy and magnifying chromoendoscopy were 94.6％ (87/92),97.8％ (90/92) and 100.0％ (92/92),respectively.NBI magnifying endoscopy was superior to the magnifying chromoendoscopy (P =0.000) in the the lesion contour and microvessels pattern detection,but there was no difference in the pit patterns detected with the two techniques (P =0.394).Consistency,sensitivity,and specificity of NBI magnifying endoscopy in diagnosis of colorectal neoplastic lesions were 91.3％ (84/92),83.9％ (26/31),95.1％ (58/61),respectively,while these variables of magnifying chromoendoscopy were 89.1％ (82/92),80.6％ (25/31),93.4％(57/61),which were not statistically significant (P ＞ 0.05).Conclusion Differential diagnostic value of NBI magnifying endoscopy and magnifying chromoendoscopy for colorectal neoplastic and non-neoplastic lesions was similar,but NBI magnifying endoscopy displays the lesion contours and microvessels clearlier,and is easy to manipulate.

OBJECTIVEExpress and purify four single-stranded DNA-binding (SSB) proteins, and evaluate the binding of SSB proteins on HCV RNA.

METHODSThe expression plasmids of four SSB proteins were conducted, termed TTH, SSOB, KOD and BL21, respectively. The BL21 (DE3) was transformed by the expression plasmid of TTH, Transetta (DE3) were transformed by the expression plasmid of SSOB, KOD and BL21, then protein expression was induced with IPTG, the expression products were analysised by SDS-PAGE. To evaluate the binding of SSB on HCV RNA, RNA-SSB protein complexes were applied to a 1.2% TAE agarose gel.

RESULTSSuitable competent cells were transformed with the expression plasmids, induced by IPTG. SSB proteins were purified by affinity chromatography, to visualize their purity all SSB proteins were applied to SDS-PAGE analysis. All four proteins showed single clear bands. We have successfully obtained the SSB protein expression plasmid, expressed and purified SSB protein. TAE agarose gel electrophoresis was used to confirm SSB protein-RNA binding activity. The each of SSB-RNA complex migrated more slowly than the sole RNA, which suggested SSB protein could specifically bind to RNA.

CONCLUSIONSWe have expressed and purified four SSB proteins, and for the first time found that SSB protein can bind HCV RNA. Our results may provide a basis for future studies of the novel functions of SSB proteins on RNA.

DNA, Single-Stranded ; genetics ; metabolism ; DNA-Binding Proteins ; chemistry ; isolation & purification ; metabolism ; Hepacivirus ; Hepatitis C ; metabolism ; virology ; Humans ; Molecular Weight ; Protein Binding ; RNA, Viral ; genetics ; metabolism

Objective To investigate the relationship between truncating mutations of APC gene and sporadic colorectal cancer,and analyze the feasibility of non-radioactive protein truncation test (PTT) in the detection of mutations of APC gene.Methods Ninety-six samples of sporadic colorectal cancer tissues ( including 44 patients with colonic cancer and 52 patients with rectal cancer) were obtained from the General Hospital of Ningxia Medical University from September 2008 to September 2010.The mutation cluster region of the APC gene was screened using digital PTT labeled with fluorescent Lys-t-RNA,with a polymerase chain reaction fragment amplified from genomic DNA serving as a tenplate for in vitro translation.The occurrence of gene mutation was determined according to the emergence of truncated peptides.The mutation cluster region of the APC gene in 46 samples of colorectal cancer tissues was analyzed by direct sequencing.The detection rates of the 2 methods were compared by chi-square test.Results Thirteen (26％) truncated peptides were detected in the 50 samples of colorectal cancer tissues.The mutation type of 4 samples is nonsense mutation,which resulted in emergence of truncated gene products.Eleven (24％) truncated peptides were detected in the 46 samples of colorectal cancer tissues.There was no significant difference in the detection rates between PTT and direct sequencing ( x2 =0.033,P ＞ 0.05 ).Conclusions Truncating mutations of APC gene are common alterations in sporadic colorectal cancer in the Chinese.Digital PTT labeled with fluorescent Lys-t-RNA is rapid and high-sensitive in screening gene mutations.

Female ; Humans ; Middle Aged ; Sarcoma, Myeloid ; Tonsillar Neoplasms

Objective To evaluae possible association between interleukin-1 beta (IL-1?) gene exon 5 polymorphism and childhood asthma.Methods The study was conducted in two different groups: asthmatic children(n=55) and healthy children(n=35). The IL-1? gene exon 5 polymorphism was genotyped by polymerase chain reaction-restriction fragment length polymorphism analysis (PCR-RFLP). Results Frequencies of CC,CT and TT genotypes were 92.7%,7.3%,0, and frequencies of C,T allele were 96.4%,3.6% in asthmatic group. However, frequencies of CC,CA and AA genotypes were 85.7%,14.3%,0, and frequencies of C,T allele were 92.9% ,7.1% in healthy group. There were no significant difference in distribution of genotypes and allele frequencies between two groups.Conclusion IL-1? gene exon 5 polymorphism may not be associated with childhood asthma.

0.05).Conclusion PAF-AH-Ala379Val gene mutation is unrelated to bronchial asthma in children.

Objective To investigate the polymorphism of glutathione S-transferease P1 gene(GSTP1) and the association between the mutation and susceptibility in childhood asthma.Methods The distribute frequency of Ile105/Ile105,Ile105/Val105 and Val105/Val105 ge-notype in GSTP1 of 51 children with asthmatic and 40 normal children were studied with polymerase chain reaction-restriction tragment length polymorphism(PCR-RFLP).Results The frequencies of Ile/Ile Ile/Val,Val/Val genotype were 66.7%,27.4% and 5.9%,the frequencies of Ile,Val allele were 80.4% and 19.6% in the asthmatic group.But the frequencies of Ile/Ile,Ile/Val,Val/Val genotype were 90.0%,7.5% and 2.5%,the frequencies of Ile,Val allele were 93.8%,6.2% in control group.The frequencies Ile/Val,Val/Val genotype and Val allele in asthmatic group were more than that in control group.A significant difference was found in the frequency distribution of GSTP1 genotypes between two groups(?2=6.947 P