[Negative HBsAg and HBsAb in Women of Child-bearing Age in Mianyang].

OBJECTIVES: To investigate the distribution of women with negative HBsAg and HBsAb at child-bearing age in Mianyang. METHODS: A total of 62 551 women aged 15-49 yr. were selected randomly using a multistage sampling strategy in Mianyang to participate in a questionnaire survey. Blood samples were collected during the survey. HBsAg and HBsAb were detected by enzyme-linked immunosorbent assay (ELISA). Those who were both HBsAg and HBsAb negative were deemed as susceptible to future infection of HBV. RESULTS: Data from 62 035 participants were valid for analysis: 28 460 (45.88%) were both HBsAg and HBsAb negative. Those aged 15-20 yr. had the lowest negative rate. Higher HBsAg and HBsAb negative rates were found in Han (lowest in Tibetan), rural residents, widowed/divorced (lowest in married), peasants (lowest in medical workers), those with a family history of Hepatitis B and without vaccination ( P<0.005). CONCLUSIONS: A high proportion of women at child-bearing age in Mianyang was found to be HBsAg and HBsAb negative. They should be monitored and vaccinated as a priority population in the prevention of mother-to-children infection of hepatitis B.

[Clinical experiences of Professor Li Zhi-dao's acupuncture technique at muscle belly for arthralgia].

Professor LI Zhi-dao's acupuncture technique at muscle belly and its clinical experiences for the treatment of arthralgia are introduced. From aspects of TCM, anatomical physiology and sports biomechanics, the theory basis of this technique is explained, while its method is elaborated in details from acupoint selection and manipulation combined with classic medical cases. The acupuncture technique at muscle belly is applied at the muscles which already have pathological changes, avoiding re-stimulation on the pain area. It provides new thinking methods and references for acupuncture to treat arthralgia.

[Direct determination of lead and cadmium in soil by slurry-sampling graphite furnace atomic absorption spectrometry using matrix modification technique].

A method for the direct determination of lead and cadmium in soil by slurry-sampling graphite furnace-atomic absorption spectrometry using NH4 H2 PO4 as matrix modifier was developed. The effects of slurry stability, particle size of sample, matrix modifiers, ashing temperature, atomization temperature and common coexistent components on the signal intensities of lead and cadmium were investigated. The apparent activation energies of lead and cadmium were measured based on the linear relationship between the logarithm value of atomization peak time and atomization temperature. The mechanism of matrix modification was discussed. Under optimized conditions, the detection limit was 9.05 x 10(-10) g x mL(-1) for Pb and 1.76 x 10(-11) g x mL(-1) for Cd. The recoveries were in the range of 91%-97% for Pb and 93%-109% for Cd. The relative standard deviations were in the range of 4.2%-7.8%.