The contamination of groundwater by methyl tert-butyl ether(MTBE) has become widespread.As a result,the bioremediation of MTBE is becoming an active area of research.In this paper,the progress of the studies on the degradation of MTBE by microbes was reviewed,focusing on the aerobic strains that could degrade MTBE.The possible metabolic pathways of MTBE were discussed as two main pathways separated by tert-butyl alcohol(TBA).The effect of environment factors,coexisting pollutants,and inter metabolite on the MTBE degradation were also discussed.

Objective: To investigate the possible association between codon 2020 polymorphism(Asn2020Ser) of IGF2R gene and the susceptibility to colorectal cancer(CRC) and hepatocellular carcinoma(HCC) in Chinese population. Methods: The IGF2R Asn2020Ser genotypes were determined by TaqMan assay in 345 CRC cases and 670 controls, and in 469 HCC cases and 558 controls. Odds ratios(OR) for cancer and 95% confidence intervals(CI) from unconditional logistic regression models were used to evaluate relative risks. Potential risk factors were included in the logistic regression models as covariates in the multivariate analyses on genotype and cancer risk. Results: The Ser allele of the IGF2R Asn2020Ser polymorphism was significantly associated with decreased risks of CRC and HCC. As compared with Asn/Asn genotype, Asn/Ser,Ser/Ser and Ser-allele carriers (Asn/Ser or Ser/Ser genotype) had significantly decreased risks of CRC, with the decrease being 0.71-fold (95% CI = 0.54-0.94, P = 0.017), 0.64-fold(95% CI = 0.42-0.97, P = 0.036) and 0.69-fold(95% CI = 0.53-0.90, P = 0.008), respectively. A similar decreased HCC risk was also shown, with the decrease being 0.68-fold(95% CI = 0.52-0.89, P = 0.005) for Asn/Ser genotype, 0.78-fold(95% CI = 0.52-1.16, P = 0.212) for Ser/Ser genotype, and 0.70-fold(95% CI = 0.54-0.90, P = 0.006) for Ser-allele carriers, when compared with Asn/Asn genotype. Conclusion: The Ser allele of the IGF2R Asn2020Ser polymorphism is potentially one of the protective factors against CRC and HCC in Chinese population.

Cytomegalovirus ; genetics ; Cytomegalovirus Infections ; virology ; DNA, Viral ; genetics ; Female ; Genotype ; Hepatitis, Viral, Human ; virology ; Humans ; Infant ; Infant, Newborn ; Male ; Polymorphism, Restriction Fragment Length ; Viral Envelope Proteins ; genetics

Child ; Child, Preschool ; Enterovirus ; isolation & purification ; Enterovirus A, Human ; isolation & purification ; Female ; Fluorescence ; Hand, Foot and Mouth Disease ; virology ; Humans ; Infant ; Male ; Polymerase Chain Reaction ; methods ; RNA, Viral ; analysis

Adult ; Biomarkers, Tumor ; metabolism ; Epididymis ; metabolism ; pathology ; surgery ; Humans ; Inhibins ; metabolism ; Leydig Cell Tumor ; metabolism ; pathology ; surgery ; Male ; Testicular Neoplasms ; metabolism ; pathology ; surgery ; Vimentin ; metabolism

Objective: To study the interpersonal interaction of junior high school students and its relationship with self-consciousness. Methods: 265 junior high school students were given the measurement of interpersonal relationship, and administered the questionnaire of Piers-Harris children self-consciousness one week later. Results: ①The interpersonal relationship of junior high school students was interactive. ②There were statistically significant differences among some dimensions of self-consciousness of junior high school students of different grades and genders. ③Intellgence and school performance had important effect on personal acceptance of junior high school students. Conclusion: There is interpersonal interaction among junior high school students, and intelligence and school performance influence the personal acceptance significantly.

Objective To analyze the data collected from surveillance sites in Shanxi province in epidemiological investigations during 2004 - 2008 and understand the influence of such factors as rat density and vectorial quantities on plague epidemic intensity, thus provide some scientific basis for plague control and prevention. Methods To collect the data of surveillance during 2004 - 2008 in the 12 counties of plague surveillance by retrospective method. Sort and analyze the collected data according to the requirement of operational scheme for plague surveillance-calculate the rat density of spermophilus dauricus, meriones meridianus and the small rodents, and the flea index and the flea infection ratio of body flea, burrow track, cave. The results of serological tests were analyzed at the same time. Results As showed in the results, the mean density of spermophilus dauricus was 1.12 merely in each hectare, and that of meriones meridianus and small rodents were 7.42%(2130/28 700) and 8.03%(3886/48 400), respectively. The flea infection rate of spermophilus dauricus and meriones meridianas were 25.78% ( 1933/7497 ) and 44.19% (2028/4598), respectively;the flea index of spermophilus dauricus and meriones meridianus were 0.59 and 1.84, respectively. The number of nests excavated with flea for spermophilus dauricus was 70, and the numbers of nests and flea were 362 and 333, respectively. The flea infection rate was 19.34 % (70/362), and the flea index was 0.92. The number of nests excavated with flea for meriones meridianus was 34, and the numbers of nests and flea were 177 and 124, respectively. The flea infection rate was 19.21%(34/177), and the flea index was 0.70. The number of caves explored for spermophilus dauricus was 7171,and the number of burrows with flea was 62, so the flea infection rate was 0.86%(62/7171 ), and the flea index was 0.01. Conclusions With a relatively high density and large quantity and considering the epidemic features of animal plague in periphery provinces in recent years, plague may still happen and spread in Shanxi province diespite the negative results of all those serological tests, by means of importing from other provinces.

Objective From the point of view of pharmaceutical economics,to analyze and compare the clinical efficacy,safety,compliance and economic effect of three kinds of scheme:1.moxifloxacin,2.moxifioxacin combined with ambroxol,3.azithromycin combined with levofloxacin in the treatment of acute exacerbation of chronic bronchitis (AECB).Methods Retrieval Chinese joumal full-text database,Wanfang medical database and Chinese science and technology periodical full-text database,included three options for the treatment of AECB randomized controlled trial (RCT) literature,through the analysis of the data to make drug economics evaluation.Results The total effective rates of three programs were 94.92％,95.08％,94.90％,the difference was not statistically significant (P ＞ 0.05).The cost-effectiveness ratios were 213.34,536.40,61.22.Conclusion The efficacy of three treatment options is similar,azithromycin combined with levofloxacin has economic advantages.

Combined pulsed-field gradient, shaped pulses, and product operator calculations (algorithm), two-dimensional 1 H-31 P hetero-nuclear multiple quantum coherence ( HMQC) pulse sequence was established with the aid of C language. The result showed that coherent transfer path selection could be achieved by adjusting the ratio of two gradient strength ( g1 , g2 ) . The best ratio of g1 and g2 was -5:4 . The HMQC method based on the above sequence can be used for identifying the alkyl groups coupling with phosphorous nucleus. For the different alkyl groups, the sensitivity of this method decreased in the order methyl>isopropyl>ethyl>propyl. The limit of detection was about 10 mg/L. This method can be directly used for the screening and identification of phosphorus chemical warfare agents and related compounds.

Objective To investigate the application of endovascular distal parent artery occlusion in vertebral artery dissecting aneurysms involving the posterior inferior cerebellar artery.Methods The clinical and follow-up data of 5 patients with vertebral artery dissecting aneurysms involving the posterior inferior cerebellar artery who received the endovascular distal parent artery occlusion were retrospectively analyzed.Results Complete occlusion of dissected arterial and aneurysm segments was achieved in 4 patients.After followed up 6-12 months,angiography showed no recurrence or neurological deficit.Continued filling of the dissected aneurysm was observed in 1 patient's follow-up angiography,but without rehaemorrhagia or neurological deficit.Conclusions The endovascular distal parent artery occlusion is a safe and efficient choice for treating vertebral artery dissecting aneurysms involving the posterior inferior cerebellar artery,which keeps the posterior inferior cerebellar artery flowing unobstructed while clipping the dissecting aneurysm.