[NRD assisted Ilizarov technique in the treatment of infected bone and soft tissue defect of tibia]

OBJECTIVE

To investigate the clinical effect of NRD assisted Ilizarov technique in the treatment of infected bone and soft tissue defect of tibia.

METHODS

All 48 patients with infected bone and soft tissue defect of tibia were randomly divided into study group and control group from March 2013 to December 2020. There were 34 males and 14 females, aged from 24 to 55 years old with an average of (40.54±11.64) years old. There were 25 patients in the study group, including 17 males and 8 females, aged from 31 to 55 years old with an average of (41.36±9.69) years old. The study group were treated with NRD assisted with Ilizarov bone transport technique. There were 23 patients in control group, including 17 males and 6 females, aged from 24 to 53 years old with an average of(38.61±8.76) years old. The control group were treated with traditional bone transport technique. The curative rate, recurrence rate, incidence rate of pin track infection, time of using antibiotics, time of wound healing, time of carrying external fixation, time of bone transport, time of bone healing and postoperative function were used to evaluate the therapeutic effect of the two groups.

RESULTS

The follow-up period was from 12 to 62 months with an average of (33.0±7.2) months. At the final follow-up, there was no significant difference in the curative rate between the two groups (P>0.05). The recurrence rate in the study group was lower than that in the control group(P<0.05). The incidence of pin track infection in the study group was lower than that in the control group (P<0.05). The time of using antibiotics and wound healing in the study group was shorter than that in the control group(P<0.05). There was no significant difference in the time of bone transport and carrying of external fixation between the two groups(P>0.05). There was no significant difference in bone healing and postoperative function between the two groups(P>0.05).

CONCLUSION

NRD assisted Ilizarov technique can achieve satisfactory results in the treatment of infected bone and soft tissue defect of tibia and shorten the treatment period and the time of using antibiotics. It is worthy of development in clinic.

[Effect of haidonghua powder(HDHP) on hypothalamic obesity in rats]

OBJECTIVE

To study the effect of HDHP including Laminaria japonica Aresch. and Benincasa hispida(Thunb.) Cogn. etc. on antiobesity in rats with hypothalamic obesity.

METHOD

A rat model of hypothalamic obesity induced by MSG was used and the relative indexes was observed.

RESULT

HDHP(2.5 g.kg-1) could significantly reduce the Lee's index as well as the size of fat cells. HDHP did not influence the serum levels of T3 and T4, insulin and aldosterone, did not inhibited appetite not led to diarrhea.

CONCLUSION

HDHP has the effect of anti-obesity, Without any influencing on the function of thyroid gland and metabolism of water and salt. The mechanism is related to the reduction of fat cell size and the accumulation of fat.

[Establishment of studying system cloned vernalization-putative cDNA clone by means of differential display PCR]

Differential display PCR has been developed as a tool detecting and characterizing specially expressed gene in eukaryotic cells recently. In this paper, a studying system was established which applied the novel approach of differential display PCR to clone vernalization-related cDNA clone. Here methodological details were provided which included the purification of total RNA, removal of contaminated DNA, reverse transcription of cDNAs, parameters of PCR, electrophoresis of amplified cDNAs, recovery and reamplification of cDNAs. It was also identified a vernalization-putative cDNA clone (VPC) of VPC28 which was only expressed at the key stage of vernalization for 20 d in winter wheat. These results moreover made it readily applicable to a broad spectrum of similar studies.

[Study on effects of Codonopsis eupolyphaga anti-obesity powder in mice with nutritive obesity]

OBJECTIVE

To observe the effects of Codonopsis Eupolyphaga anti-obesity powder(CEAOP) in mice with nutritive obesity.

METHODS

CEAOP 0.5-2.5 g/kg was given to mice for 4 weeks and its effect was observed.

RESULTS

CEAOP could significantly reduce the Lee's index, weight of fat cushion and fat index, lower the blood levels of total cholesterol, triglyceride and blood glucose, but influence neither the calories and quantity of food intake, nor the endurance against anoxia and fatigue, the property of stool was not changed at all.

CONCLUSIONS

The anti-obesity effect of CEAOP was similar to Fenfluramini but without influence on appetite and bowel movement, tolerance against anoxia and fatigue. The mechanism of the anti-obesity might be related with its metabolism regulating actions on lipids and glucose.

Indoor radon and lung cancer in China

Radon has long been known to contribute to risk of lung cancer, especially in undergound miners who are exposed to large amounts of the carcinogen. Recently, however, lower amounts of radon present in living areas have been suggested as an important cause of lung cancer. In an effort to clarify the relationship of low amounts of radon with lung cancer risk, we placed alpha-track radon detectors in the homes of 308 women with newly diagnosed lung cancer and 356 randomly selected female control subjects of similar age. Measurements were taken after 1 year. All study participants were part of the general population of Shenyang, People's Republic of China, an industrial city in the northeast part of the country that has one of the world's highest rates of lung cancer in women. The median time of residence in the homes was 24 years. The median household radon level was 2.3 pCi/L of air; 20% of the levels were greater than 4 pCi/L. Radon levels tended to be higher in single-story houses or on the first floor of multiple-story dwellings, and they were also higher in houses with increased levels of indoor air pollution from coal-burning stoves. However, the levels were not higher in homes of women who developed lung cancer than in homes of controls, nor did lung cancer risk increase with increasing radon level. No association between radon and lung cancer was observed regardless of cigarette-smoking status, except for a nonsignificant trend among heavy smokers. No positive associations of lung cancer cell type with radon were observed, except for a nonsignificant excess risk of small cell cancers among the more heavily exposed residents. Our data suggest that projections from surveys of miners exposed to high radon levels may have overestimated the overall risks of lung cancer associated with levels typically seen in homes in this Chinese city. However, further studies in other population groups are needed to clarify the carcinogenic potential of indoor radon.

Quantitative optical image subtraction by means of pulse-width modulation through one-dimensional contact screens

A quantitative optical image-subtraction method based on the principle of spatial pulse-width modulation through a one-dimensional contact-screen process and superposition of positive and negative halftone photographs is described. The difference in intensity transmittance of two images A and B can be measured by either superposing the halftone positive of A onto the halftone negative of B or vice versa. Not only subtle differences between the two photographs but also the polarity of such differences can be found.