The infrared spectra of benzoic acid in its solid form and in various solvents were determined.The result confirmed that the carbonyl bond of the dimer form of benzoic acid occurs at 1694 cm~(-l),but not at 1653 cm~(-1).The influences of hydrogen bond (polar solvent) and solvent effect (nonpolar solvent) on the vibrational frequency of C=O bond was also studied.In the nonpolar solvent,owing to the increment of the dielectric constant (?) of the solvent,C=O stretching frequency decreases slightly and the relationship between them can be expressed with the following formula:Here K and C are two contants,V_v and V_s represent the vibrational frequencyof C=O bond of benzoic acid in vapor and in solvent respectively.

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 explore the effect of behavioral inhibition/activation system on internet addiction among college students, and to investigate the moderating role of social support.Method:From May to June in 2019, a questionnaire survey was conducted on 630 college students in Tianjin by internet addiction questionnaire, social support rating scale and behavioral inhibition activation scale.SPSS 24.0 and PROCESS macro program were used to analyze the data and check the moderating effect.Results:(1)The score of internet addiction scale for college students(2.73±0.63) was negatively correlated with the scores of all dimensions of social support(objective support: 11.06±4.19, r=-0.35, P<0.01; subjective support: 22.14±4.26, r=-0.25, P<0.01; degree of support utilization: 8.22±2.26, r=-0.33, P<0.01), positively correlated with the behavioral inhibition(2.58±0.53, r=0.63, P<0.01) and activition system(2.55±0.43, r=0.53, P<0.01). The behavior inhibition/activation system positivly predicted Internet addiction behavior( β=0.48, 0.17, both P<0.01). (2)The three dimensions of social support played a moderating role between behavioral inhibition system, behavioral activation system and college students' Internet addiction problem( β=0.08-0.16, all P<0.05). Among them, the objective support had the greatest regulatory effect, and the degree of support utilization was the second. Conclusion:The behavior inhibition/activation system has an important influence on the Internet addiction behavior of college students, and social support plays a very important moderating role.

Atherosclerosis has been considered as one of inflammatory disease. Besides its action on vasomotor tone regulation, nitric oxide (NO) is recognized to be an anti-inflammatory molecule. The anti-inflammatory effects of NO are attributable to inhibition of nuclear factor kappa B activation.

[Objective] To study the features in lower extremiy injuries of new recruits in the Chinese special military force during Basic Training Program,and supply scientific precautionary measures to reduce the military training injury.[Method]A special military force group had been chosen and the circumstance of military injuries in lower extremiy had been observed from Jan.to March in 2006.The population selected for study included all 281 new recruits of the unit.A questionnaire was designed to document all of the correlated information,and all injuried soldiers were examined and inquired about the case history.All data had been classified for analysis.[Result]In all 281 samples,75 cases occurred lower extremiy injuries(up to 26.69%).In all lower extremiy injuries,35 cases were leg injuries(up to 46.67%),17 cases were ankle injuries(up to 22.67%),11 cases were foot injuries(up to 14.67%).In all injuries,20 cases were acute injuries(up to 26.67%),55 cases were excess fatigue injuries(up to 73.33 %).In all injuries,38 cases were bone and joint injuries(up to 50.67%),37 cases were soft tissue injuries(up to 49.33%).The reasons for injuries were training field(l 8 cases),exercise overload(61 cases).In all training programs,64 cases were occured in 3 kilo run.[Conclusion]Lower extremiy injuries are common and frequently occurring illness.The features and methods of injuries are different and complicated.In this study,excess fatigue injuries caused by exercise overload were the most important.After comprehened the occurring rule,it should be emphasized on health propaganda.During basic military training,we should pay attention to soldiers' health condition.Training should be carried out step by step,to reduce the occurrence lower extremiy training injuries.

AIM: To analyse the variety of the alkaloid and volatile oil from Herba Ephedrae after mix-fring with honey. METHODS: The volatile oil was analysed by GC-MS and the total alkaloids were determined by method of Chp. RESULTS: The volatile oil changed distinctly. The contents of Isolineole、p-Cymene、D-limonene、Evcalyptol、?-Terpinen increased evidently, but the contents of Benzaldehyde、Tetramethylpyrazine、p-Vinylanisole、?-Terpineol、?-Terpineol decreased and the contents of the total alkaloids decrease as well. CONCLUSION: The study provides a new experimental basis for the process theory of Herba Ephedrae.

Objective To investigate effects of Tanshinone Ⅱ A (Tan Ⅱ) on proliferation and apoptosis of myeloblastic leukemia cell lines.Methods NB4,K562 and THP-1 cells were incubated with TanⅡA for 24,48 and 72 hours.Ddaunorubicin was used as a positive control.Cell proliferation was monitored by MTT assay.Cell apoptosis and cell cycle were determined by Annexin Ⅴ-FITC/PI flow cytometry.Expression of Caspase-3 was quantified by spectrophotometry.Results After incubation with various leukemia cells for 24,48 and 72 hours,Tan Ⅱ inhibited proliferation of NB4 cells with IC50 of 24.11,9.60 and 7.28 μmol/L,inhibited K562 cells with IC50 of 31.75,11.88 and 6.81 μmol/L and inhibited THP-1 cells with IC50 of 111.10,32.82 and 11.82,respectively.After treatment with Tan Ⅱ for 48 hours,cell apoptosis,the number of G1 phase cells and the expression of Caspase-3 in all three leukemia cell lines were increased significantly comparing with the blank control group (P ＜ 0.05).Conclusions Tan Ⅱ A has proliferation inhibitory effect on myeloblastic leukemia cell lines by the order of effect NB4＞K562＞THP-1.Tan ⅡA displays anti-leukemia activity possibly through arresting leukemia cells in G1 phase and inducing apoptosis by increasing Caspase-3 expression.

Objective To compare the advantages and disadvantages of three methods of yeast-like fungi identification of vulvovaginal candidiasis (VVC).Methods The pathogenic candida strains were identified by CHROM agar chromogeinc culture medium,the chromogenic medium of Autobio and VITEK 2 system,and the result of VITEK 2 system was the gold standard.Results All candida strains were appraised.By VITEK2 system,217 candida isolates were identified as candida albicans,and 26 were detected as non-candida albicans.214 isolates were identified as candida albicans and 13 isolates were identified as non-candida albicans by Autobio.214 isolates were appraised as candida albicans,16 isolates were identified as non-candida albicans.The coincidence rate of identification of CHROMagar and the chromogenic medium of Autobio were 94.7％ and 95.06％.Compared with VITEK 2 system,there was no significant difference between these two chromogeinc culture medium identifying candida albicans and non-candida albicans.Conclusion The chromogenic medium of Autobio has higher cost-effectiveness,higher color discrimination and simpler technical operation,and is worthy of promotion in identifying candida species in clinic.

Objective To explore the construction and application effects of extended care form for children with epilepsy based on Omaha System.Methods Based on Omaha System,the form was established by referring medical records,literature review and three rounds of focus group discussion.From February to June,2016,48 children with epilepsy were selected as the observation group and received routine care as well as management using the form based on Omaha System;from August to December,2015,48 children with epilepsy were selected as the control group and received routine care and follow-up.The effects of intervention and scores of Family Management Measure were compared between two groups.Results Nursing issues in all domains for the observation group 3 months after intervention were lower than those during hospitalization except financial situation (P＜0.05);there was statistically significant difference in scores of knowledge-behavior-status of main nursing issues before and after intervention except cognition and mental health items (P＜0.05).Duration of hospitalization,expenditure,readmission rate,EEG results and scores of FAMM in the observation group were better than those in the control group (P＜0.05).Conclusion The construction and application of the form based on Omaha System can provide references for longterm management for children.

To explore the clinical effect of ganglioside sodium in the treatment of acute cerebral infarction and its influ-ence on hs-CRP and TNF-α in serum. Methods:A total of 216 patients with acute cerebral infarction were randomly divided into the observation group and the control group. The control group (108 cases) was given regular treatment, and the observation group (108 cases) was given 100 mg ganglioside in 250 ml 0. 9% sodium chloride, ivd, qd additionally, and the treatment course was 14d. The clinical effect of the two groups was compared, and the change of hs-CRP and TNF-αin serum was also researched in both groups. Re-sults:The total effective rate of the observation group was 90. 7%, which was obviously higher than that of the control group (71. 3%, P<0. 05). After the treatment, the NDS score of the observation group was lower than that before the treatment, while the ADL score was higher than that before the treatment (P<0. 05). After the treatment, the level of hs-CRP and TNF-α in serum was higher than that before the treatment in the two groups (P<0. 05), and that in the observation group was higher than that in the control group (P<0. 05). During the treatment, no adverse reaction was shown in the two groups. Conclusion:The clinical effect of ganglioside sodi-um in the treatment of acute cerebral infarction is promising, which can reduce the level of hs-CRP and TNF-αin serum of the patients and improve the scores of NDS and ADL with good safety, and is worthy of further clinical application.