Objective: To research identification methods of the two crude drugs from the original plants with close relationship and very similar macroscopic shape,"Chuipencao"(Herba Sedi) and "Fujiacao"(Herba Sedi Linearis).Methods:Microscopic technique and TLC were used to determine the pharmacognostical characters for identification purpose.Results: The microscopic observations showed that the tissue structures of the stems and the microscopic characters of the powders were very similar between the two herbal drugs.But there were significant differences in number of the vessel,shape of the pith,and number of the purplish-red cell.For the samples collected in August,number of the vessel of the former usually was only 35-58,while the latter was 75-150.Pith of the former usually was in the shape of a triangle,while the latter was in the shape of Y.The TLC result had also obvious difference between the two drugs.Besides,there were some differences of the pharmacognostical characters of the samples collected in distinct periods.Conclusion: The results provided scientific basis for the identification of the two crude drugs and suggested that the general microscopic features be not important in the microscopic identification of the crude drugs from the original plants with closer relationship.

Objective: To explore the characteristics of IR spectra of the crude drug Herba Sedi collected in different habitats and seasons.Methods: The infrared spectra of all the samples of the whole plants were obtained by FT-IR spectroscopy,the sample powder tablets were used,and identifi cation features were determined through comparative study.Results: The harvest seasons of the samples are remarkly related to the positions(cm-1),intensity or ratios of some major absorbing peaks of the infrared spectra from the 15 samples of several different months and 4 habitats in Hubei Province,China.As for peak positions,the peak values(1625?7)cm-1 of all the samples in spring are less than 1623cm-1,but in autumn(April to October) are generally more than 1628 cm-1.And peak values(1057?16)cm-1 of the samples of spring are more than 1050 cm-1,but less than 1050 cm-1 for the samples of summer and autumn.Moreover,the habitats of samples are also related to IR spectra to some certain extent.Conclusion: The harvest seasons of Herba Sedi from Hubei Province can be preliminarily ascertained according to the IR spectra features.IR technique should be paid attention to in research and identifi cation of the harvest periods of crude plant drugs.

Objective To assess the reliability and validity of the Tree-Drawing Test in medical college students.Methods The study randomly selected 312 aged 19 to 23-year-old medical students to take part in TreeDrawing Test.In addition,a total of 275 college students were selected to receive re-test,30 days late and Pearson correlation coefficient of two tests were calculated.The three raters were invited to assess 30 trees painting score,analyzing the Kendall coefficient of concordance between the scores to verify raters' reliability; parts of students also participated in the 16PF test,SAS,SDS test,analyzing the correlation coefficient between the various test results,in order to assess the effectiveness of the Tree-Drawing Test.Results The re-test reliability in different time was 0.570-0.733 and 0.341-0.713 (P＜0.05),the raters' reliability was 0.491 ～ 0.626(P＜0.05),there are some correlations between Tree-Drawing Test and 16PF,SAS,SDS.Conclusion The Tree-Drawing Test has good reliability and validity; it can be applied to the detection of college students' psychological assessment and psychological problems.

Objective To carry out the quality control testing and evaluation for three digital mammography systems.Methods The performance of three digital mammography systems was assessed by applying methods recommended in the European guidelines for quality assurance in breast cancer screening and diagnosis and Chinese specification for testing of quality control in X-ray mammography.The performance of X-ray generator of three digital mammography systems were tested and evaluated.CDMAM 3.4 phantom with four different thickness(30,40,50,60 mm) were exposured in DR,PCM,and CR system,respectively.The average glandular dose (AGD) value was measured and image quality figure (IQF) analysis was performed in each thickness.Results The X-ray machine performance of DR and CR was in accordance with existing standard,however the standard was inappropriate to evaluate part of X-ray machine performance of PCM system.The AGDs for system DR were 1.20,1.42,1.75 and 2.20 mGy for 30,40,50 and 60 mm PMMA thickness,respectively.The respective AGDs for system PCM and CR were 0.82,1.19,1.33,1.70 mGy and 0.59,0.88,1.47,2.19 mGy.For the same phantom thickness sequence,the IQFs were 21.36,21.57,27.25 and 30.58 for system DR,28.02,29.10,35.90,and 41.24 for system PCM,whereas they were 39.78,39.30,43.85 and 48.08 for system CR.Conclusions The AGDs of all three systems were in accordance with the values recommended in European guideline.The AGD and IQF could provide an effective way for performance assessment and constancy checks for digital mammography systems.

Objective To evaluate the killing effect and the uptake of 125I-UdR on human lymphoma Raji and Daudi cell lines. Methods The amount of 125I-UdR in the cells and cell nuclei were determined after incubation of different time in RPMI 1640 culturing medium containing different concentrations of 125I-UdR. The killing effects of 125I-UdR on Raji and Daudi cell lines were estimated through MTT assay and cell cycle was analyzed by propidium iodide (PI) staining. Results The amounts of 125I-UdR in Raji and Dandi cells and cell nuclei were much higher than that of Na125I(P < 0.05). The amounts of 125l-UdR in Raji and Daudi cells were 14414±95 and (6916± 53.69) Bq/106 cell when the concentration was 100 kBq/ml. The amounts of Na125I were 68± 3.8 and (324±32.8) Bq/106 cell. The uptake of 125I-UdR in Raji and Daudi cells and cell nuclei increased with the 125I-UdR concentration and incubated time. The cell surviving fractions of 125I-UdR groups was much lower than that of Na125I groups (P < 0.05). When the concentration was 500 kBq/ml and incubated time was 48 hours, the Raji and Dandi cell surviving fractions of125I-UdR groups were (19.78 ± 1.39)% and (43.17 ± 2.69) % ;those of Na125I groups were (79.10 ± 1.79) % and (80.36 ± 6.12) %. The surviving fractions of 125I-UdR groups reduced with the 125I-UdR concentration. Conclusions 125I-UdR can be specially ingested by Raji and Daudi cells and incorporated into DNA, then the cells will be killed. The uptake of 125I-UdR is dose and time dependent.

No abstract available.
Meningitis* ; Sepsis*

Objective Acute bilirubin encephalopathy in neonates is the most serious complication of neonatal hyperbilirubinemia, is one of the main causes of neonatal death and disability. Clinical early diagnosis, early treatment can improve the prognosis in children. Methods Brainstem auditory evoked potential (BAEF) was detected on two patients (40 patients with ABE, 40 cases of normal controls, all full-term) in the state of sleep in children and analysis the difference between the two groups ,all testing was completed by experienced Department of ENT full-time technician in charge,SPSS15.0 statistical analysis software was took for data analysis (using rank sum test method). Results There was significant difference between the two groups of neonatal latency of wave I, latency of waveⅤ, interpeak time , acute bilirubinⅠ-Ⅴencephalopathy group was significantly longer than that of the control group. Conclusions The BAEF detection is the sensitive index of brainstem damage , can objectively and sensitively reflect the function of the central nervous system , can reflect the functional status of cochlear and brainstem structures , often brainstem was slightly damaged but no clinical symptoms and signs , BAEP has changed significantly , so the conventional BAEP examination performed on patients with hyperbilirubinemia help to find bilirubin brain damage as early as possible,and prevent the occurrence of bilirubin encephalopathy.

BACKGROUND: Spinal cord injury often leads to patients’ permanent sensory, motor and autonomic dysfunction because of limited inherent regeneration capacity of the central nervous system. Spinal cord injury seriously affects patients’ quality of life but there is still no effective treatment for it. The existing studies suggest that mesenchymal stem cell secretome mediates the main therapeutic effect of cell transplantation and avoids problems such as cellular rejection, so it will become a powerful tool for the treatment of spinal cord injury. OBJECTIVE: To summarize the research progress of mesenchymal stem cell secretome in the treatment of spinal cord injury, and analyze the current problems and future development direction. METHODS: The PubMed database was retrieved with “spinal cord injury, secretome” as the keywords, and Chinese databases include CNKI and Wanfang were retrieved with “spinal cord injury, secretome” as the keywords in Chinese. We retrieved the articles published from January 2013 to January 2020 and excluded the articles that were irrelevant or repetitive. At last 71 articles that met the criteria were included for review. RESULTS AND CONCLUSION: The mesenchymal stem cell secretome is rich in extracellular vesicles and soluble molecules such as growth factors and neurotrophic factors, and it plays prominent place in reducing cell apoptosis, regulating immune response, inhibiting scar formation, promoting nerve regeneration and angiogenesis. Numerous studies have shown that the mesenchymal stem cell secretome can promote nerve regeneration and function recovery after spinal cord injury, and it avoids the disadvantages of cell transplantation. The mesenchymal stem cell secretome will become a reliable method to treat spinal cord injury in the future.

Referring to the statistical model for the SNP haplotype phasing which was based on the allele frequencies and advised by Browning SR, we investigated and deduced the phasing method of STR haplotype with linkage disequilibrium inpaternity testing preliminarily. Haplotype phasing of two X-STRs in linkage disequilibrium were illustrated. This method provides an idea for the haplotype phasing of STR markers, which is helpful for interpreting the typing results of STR more scientifically and accurately.

Objective To evaluate the internal irradiation biological effects of 125I-UdR chitosan nanoparticles in hepatoma cells.Methods The accumulation and distribution of 125I-UdR-CS-DLN in hepatoma cells HepG2 and human liver tissue cells HL-7702 were observed with a confocal microscopy.The internal irradiation biological effects were evaluated by MTT assay,flow cytometry and single cell gel electrophoresis.The apoptosis of in situ rabbit liver tumor treated with 125I-UdR-CS-DLN was assayed by TUNEL staining technique.Results After 30 min of nano-particle treatment,its accumulation in the cytoplasm of HepG2 cells was significantly greater than that in HL-7702 cells.When the concentrations of 125I-UdR-CS-DLN was higher than 37 kBq/ml,the cell viability of HepG2 was significantly lower than that of lL-7702 at 24 and 48 h post-treatment(t =-4.46-6.31,P＜0.05),and the HepG2 cells were arrested at G1 phase and significantly impaired at G2/M phase.In addition,the degrees of DNA doublestrand break of both cell lines irradiated by 125I-UdR-CS-DLN were significantly higher than those treated with 125I-UdR,and the DNA repair capacity of HepG2 cells was significantly lower than that of HL-7702 cells(OTM:t =2.94,P ＜0.05;TDNA％:t =10.64,P ＜0.01).TUNEL staining showed that cell apoptosis could be induced in the rabbit liver carcinoma by 125I-UdR-CS-DLN but not by 125I-UdR.Conclusions The amount of 125I-UdR-CS-DLN absorbed by hepatoma cells is significantly higher than that of 125I-UdR,which suggests that 125 I-UdR-CS-DLN induces more stronger internal radiation biological effects of apoptosis and DNA damage on hepatoma cells.