Objective To investigate the correlation between carotid artery intima media thickness (IMT) and cerebrovascular hemodynamic analysis (CVA) and the diagnostic value in ischemic stroke.Methods Using colour Doppler IMT,IMT/D ratio and CVA were performed in 120 patients with hyperacute and acute ischemic stroke as compared with the health controls.Results IMT and IMT/D ratio were higher in patients with ischemic stroke than the health aduts. Vmean and Qmean in ischemic stroke hyperacute group were lower, and R,DR were higher obvious in hyperacute group than that of acute group. IMT and IMT/D ratio were negatively correlation with Vmean and Qmean and positively correlation with R and Zc.Conclusion The measurement of carotid artery IMT and CVA have clinical significance in early diagnosis of ischemic stroke.

Objective To evaluate the application value of glycerol blood chocolate soup in the bacteria preservation of Haemophilus influenzae.Methods Haemophilus influenzae strains ATCC10211,ATCC49247 and ATCC49766 were saved into glycerol blood chocolate soup,then it was stored in refrigerator at below -35℃.The preserved strains from the refrigerator at 1 month,3 months,6 months,1 year,2 years were taken out,and dissolved it at 35℃ for 5min,and then immediately transferred it to chocolate agar plate,placed it in the 35℃,CO2 environment overnight.Observed the survival of strains,colony morphology and whether the demand factor test had change.Saved the standard strains ATCC49247 and ATCC49766 2 years for the paper dispersion method drug sensitive test.Results After 2 years of observation,3 strains of Haemophilus influenzae strains grew well in the survival rate of 100%,the colony was colorless,transparent and flat moist,it could be observed gram small negative bacilli by Gram staining, blood agar satellite test was positive,no hemolysis,Columbia satellite test was negative.All traits were the characteristics of Haemophilus influenzae.The drug sensitivity characteristics of ATCC49247,ATCC49766 standard strains were still in line with the requirements of CLSI.Conclusion Glycerol blood chocolate soup is suit for Haemophilus influenzae bacteria preservation.

Objective To evaluate the quality and application value of improved sheep blood chocolate medium.Methods The ATCC 10211 of Haemophilus influenzae was inoculated into the modified medium and unmodified medium,the average growth index(GI)of Haemophilus influenzae in two kinds of culture medium was compared.Based on 352 selected qualified sputum specimens for detection of Haemophilus influenzae,the positive isolation rate of medium was compared between the two groups.Results GI value of the traditional blood chocolate culture medium was (3.69 ±0.58),which was significantly lower than (15.08 ±1.34)of the improved sheep blood chocolate culture medium,the difference was significant (t =25.31,P <0.01 ).352 sputum specimens in the improved sheep blood chocolate culture medium,Haemophilus influenzae detected in 41 cases,the positive rate was 11.65%.And 352 sputum specimens in traditional sheep blood chocolate culture,Haemophilus influenzae detected in 18 cases,the positive rate was 5.54%.There was significant differenceof Haemophilus influenzae in separation based on 2 kinds of chocolate culture medium (χ2 =21.04,P <0.05).Conclusion Haemophilus influenzae significantly improved sheep blood colony in chocolate culture medium,grows well,easily to be identified,which helps to detect sputum specimens of Haemophilus influenzae.

Objective To confirm whether the open-ended coaxial line is effective in detection of the differences in dielectric properties between colorectal cancer tissues and surrounding normal tissues and evaluation of the depth of tumor invasion. Methods The open-ended coaxial line system at frequencies ranging from 50 to 500 MHz in 98 freshly excised colorectal cancerous specimens obtained from the operating theatre of Zhujiang Hospital, was used to detect both the relative permittivity and conductivity on the serosal surface of the carcinoma nidus, the mucosa of the carcinoma nidus, and the mucosa of the surgical resection margin. Pathological examinations were conducted on each specimen after surgery. Results The values for relative permittivity and conductivity of the colorectal cancerous mucosa were significantly higher than those of the normal mucosa (P < 0.01). For the tumor which had invaded or penetrated the serosa (stage ≥ T3), the dielectric properties of both the cancerous serosa and mucosa were higher than the one restricted to muscularis propria or less intestine wall (stage < T3) over the measured frequency range, and there existed statistical differences at the common frequencies of 213 MHz and 426 MHz. Conclusion The open-ended coaxial line system may result in fast and effective diagnostic differentiation between cancerous and normal colorectal tissues as well as reasonable assessment of the tumor infiltration depth.

Vegetables, rice, eggs and drinking water samples were collected from e-waste dismantling area of Qingyuan City, Guangdong Province. Nickel (Ni) was analyzed in each sample, and the non-carcinogenic health [the daily intake (DI) and hazard quotient (HQ)] of each sample was evaluated. In this e-waste dismantling area, the contents of Ni in rice and eggs were (0.46±0.24) and (0.16±0.13) μg/g, which were higher than those in the control area [the contents of Ni in rice and eggs were (0.17±0.03) and (0.02±0.02) μg/g, respectively] (both P values<0.05). The DI values of rice, vegetable, eggs, and drinking water were (3.61-5.86), (1.75-2.99), (0.11-0.24), and (0.08-0.12) μg·kg^-1·day^-1, respectively. The HQ values were 0.180-0.290, 0.090-0.150, 0.005-0.010, 0.005-0.006, respectively. Although the HQ values of rice, vegetable, eggs, and drinking water were all lower than 1, which was an acceptable level. However, considering the possibility of combined exposure of heavy metals, the non-carcinogenic health risks of Ni in the e-waste dismantling area should still be concerned.