In this work we studied systematically the correlation between the electrone-gativity, n/r or n*/r*, and the vibrational frequency of the chemical bond X-H, vX-H, in the covalent molecular hydrides. The results showed that there is good linear relationship between them.For the molecules of the type HnX-H, two cases were discussed.Case I, when the elements (X)are situated in the same group in the periodic table, the linear relation may be expressed in the following formala:(1)Here K is a constant which varies with the number of valence electrons on the atom X.Case II , when the elements(X) are situated in the same period in the periodic table, the empirical equation can be written as follows:(2)Here A and B are constants determined by the principle quantum number and the number of valence electrons in atom X respectively.For the molecules of the type YnX-H there is also a good linear relationship between vX-H and ∑n*/r*(Y), that is,vX-H?10-2=a + b∑n*/r*(Y)(3)Here a and b are constants determined by the position of the atom(X) in the periodic table.Using the above equations we have calculated the vibrational frequences, vX-H The values obtained are close to those obtained by other authors. Therefore, the results also confirm that the values of electronegativty calculated by our methods published in the previous papers(11) are trustworthy.In addition some characteristics of these equations were analyzed and discussed preliminarily.

Objective:To observe the analgesic effect and nursing intervention of pulse epidural controlled analgesia on uterine contraction pain after cesarean section.Methods:A total of 100 cases of parturient with patient-controlled epidural analgesia after elective cesarean section in Central Theater General Hospital of the Chinese People's Liberation Army from January to March 2019 were selected as study subjects, and 100 cases were divided into observation group and control group, each group of 50 cases, the control group used constant speed epidural patient-controlled analgesia, the observation group used pulse epidural patient-controlled analgesia. The analgesic effect of uterine contraction pain after cesarean section was observed, at the same time, the two groups conducted a simulation test, the speed, time and infiltration area of the pumping liquid were recorded, and the Visual Analogue Scale (VAS) scores of incision pain and uterine contraction pain were recorded at 6 h, 12 h, 24 h and 48 h postoperatively. VAS score of contraction pain after single press, Motor Block score of iatrogenic uterine pain were recorded on the postoperative day, the first day and the second day after operation.The times of additional dose compression by analgesia pump, the times of incomplete analgesia intervention, nausea and vomiting, skin itching and other adverse reactions were recorded within 2 days after operation.Results:The infiltration area at 1, 5 min were (130.00±14.14), (334.00±2.83) cm 2 in the observation group and (65.00±7.07), (137.50±3.54) cm 2 in the control group, there were significant differences between the two groups( t values were 5.814, 61.376, P< 0.05 or 0.01). VAS scores of incision pain at 6 h and 12 h after operation were (2.36±1.05) and (2.42±0.95) in the observation group and (3.52±1.09) and (3.16±1.25) in the control group, respectively, there were significant differences between the two groups( t values were 5.425, 3.331, P<0.01). VAS scores of uterine contraction pain at 6,12 and 24 hours after operation were (2.66±0.80), (2.23±0.68), (2.22±0.71) in the observation group and (5.14±1.05), (4.48±0.71), (3.36±0.80) in the control group, respectively, there were significant differences between the two groups( t values were 2.489, 2.008, 5.004, P<0.01 or 0.05).VAS scores of contraction pain after single press on the postoperative day, the first day and the second day after operation in the observation group were (2.66±0.80), (2.23±0.68), (2.22±0.71) in the observation group and (5.14±1.05), (4.48±0.71), (3.36±0.80) in the control group, respectively, there were significant differences between the two groups( t values were 13.296,15.536, 7.534, P<0.01). The times of pressing and intervention were (2.28±1.36) and (0.90±0.61) in the observation group and (4.62±1.61), (0.62±0.53) in the control group, respectively, there were significant differences between the two groups( t values were 7.847, 2.439, P<0.01 or 0.05). Maternal satisfaction score was (5.92±1.37) and (2.34±0.82) in the observation group and the control group, there was significant difference ( t value was 15.856, P<0.01).The incidence of adverse reactions such as lower limb numbness, nausea and vomiting and skin pruritus in the observation group were 2.00%(1/50), 4.00%(2/50) and 4.00%(2/50) respectively, which were lower than those in the control group 14.00%(7/50), 16.00%(8/50), 18.00%(9/50), the difference was statistically significant ( χ2 values were 4.759, 4.000, 5.005, P<0.05). Conclusions:The pulse epidural controlled analgesia can effectively reduce the uterine contraction pain after cesarean section, and the active nursing intervention can accelerate the postoperative recovery of parturient.

Objective To study the application effectiveness of healthcare failure modes and effects analysis before the secure transportation of post anesthesia care unit(PACU) patients. Methods A total of 689 general anesthesia post-operative patients who had been recovered in PACU and transported between January to December in 2015 by convenience sampling were divided into 2 groups to receive nursed by traditional method before transportation (contrast group, 346 cases) or nursed both with traditional way and healthcare failure modes and effects analysis method to analyze (observation group, 343 cases). The Medical Risk Priority Number (RPN), Status of Failure modes and satisfaction value of physicians and nurses were compared. Results The RPN value of observation group had been cut down from (229.00 ± 52.91) points to (57.14 ± 16.04) points, there was significant difference (t=7.58, P=0.01). The occurrence rate of failure mode of observation group was 2.62%(9/343), which was obviously lower than 19.36%(67/346) of contrast group, there was significant difference (χ2=49.19, P<0.01). The satisfaction rate of observation has improved significantly from 74.36%(58/78) to 93.59%(73/78), there was significant difference (χ2=10.72, P<0.01).Conclusions Healthcare failure modes and effects analysis management method could find out the failure mode of PACU patient before the secure transportation in time, could decrease the effect of failure mode and would continuously improve the quality of PACU nursing service .

Objective:To investigate the relationship between cervical lesion development and histone acetylation that regulates RAR-β2 expression. Methods:Immunohistochemistry and Western blot analysis were performed to detect AcH3, RAR-β2, and involu-crin expression in normal cervical tissues as well as in tissues with cervical intraepithelial neoplasia (CIN)Ⅱ-Ⅲand squamous cell cer-vical carcinoma. The relationship among histone acetylation level, RAR-β2 expression, and cervical lesion severity were analyzed. Re-sults:AcH3, RAR-β2, and involucrin expression were reduced or absent with the progression of cervical lesions;significant differences were noted between the groups (P<0.05). Histone acetylation level and RAR-β2 expression were positively correlated (r=0.797, P<0.05). AcH3 and RAR-β2 expression, which were both associated with the cervical lesions, were negatively correlated [r=-0.547(AcH3), r=-0.585(RAR-β2), P<0.05]. Conclusion:Histone acetylation modification is associated with the regulation of RAR-β2 expression. This pro-cess is also likely to participate in the carcinogenesis of cervical carcinoma.

Objective To investigate the factors related with home rehabilitation in disabled older people. Methods 350 disabled older persons in line with Maoming home rehabilitation were investigated face to face or with telephone, with self-designed questionnaire. Results and Conclusion The factors affected home rehabilitation included economic capacity, ratio of pension in expense, income, social security system, efficacy of rehabilitation, diffusion of policy. The most significant factors were the economic factors.