Sample of Pingle Jiegu Dan was extracted with methanol, n-butyl ethanol and absorbed with coarse-hole resin, and its total saponin content of notoginseng was determined with spectrophotometry. The result was reproducible. This method effectively excludes the interferential elements in a complex preparation and can be employed as a method for quantitative analysis. Meanwhile, it also provides a reference for the quantitative analysis of preparation containing notoginseng.

Obgective To investigate the clinical effect of Adenine arabinoside monophosphate (Ara-A) on the treatment of infant cytomegalovirus hepatitis.Methods One hundred cases of infants with cytomegalovirus hepatitis in the Third Affiliated Hospital of Zhengzhou University from January 2012 to October 2013 were included and divided into 2 groups:Am-A group treated with Ara-A [a course of treatment lasting for 2 months included 10 mg/(kg · d) for first 2 weeks followed by 2 weeks' interval,and then resumed],and then control group was given ganciclovir [10 mg/(kg · d) for 14 days and 5 mg/(kg · d) for 1 week after 1 week's interval,for a total treatment period of 1.5 to 2.0 months].Both groups were given conventional therapy.Both before and after treatment,liver function,time of jaundice and transaminase back to normal,quantification of viral DNA returns to negative,side effects,hospitalization time and cost were also compared.Results After 2 weeks,alanine aminotramferase(ALT) in Ara-A group was significantly lower than that of the control group,and there was significant difference (P ＜0.05).After 2 months,ALT,aspartate transaminase in Ara-A group were significantly lower than those in the control group (all P ＜ 0.05).Time of transaminase back to normal [(38.5 ± 16.7) d] was significantly reduced compared with the control group [(44.3 ±22.9) d] (F =3.845,P ＜ 0.05).Time of jaundice back to normal [(27.1 ± 10.5) d],quantification of viral DNA back to negative [(39.5 ±24.0) d],hospitalization time [(22.6 ±5.8) d] and costs [(10 521.9 ±2 662.3) yuan] in Ara-A group had no significant difference compared with those of the control group (F =1.111,2.837,0.840,2.223,all P ＞ 0.05).The negative rate of viral DNA quantification in Ara-A group (80.9％) was higher than that of the control group (62.1％),and the liver injury rate (7.1％) was lower than that of the control group (15.5％),and the difference was statistically significant (x2 =9.137,11.514,all P ＜ 0.05).Condusion Ara-A is safe and effective for infant cytomegalovirus hepatitis and it is suitable for the clinical practice.

Mobile learning has the characteristics of mobility,timeliness,network and virtu-ality. We developed virtual hospital suitable for mobile devices and organized students in to a network. Through early training,clinical case screen,learning objective fix,learning process and results evaluation,mobile devices were employed to do problem-based learning,which is conducive to the integration of theory with practice,the shifting from discipline-centered to system-based courses and the improving of utilization rate of learning resource.

We constructed a phage-displayed random mutation library of Tat38-61(51N/55N), for studying the molecular evolution screening of HIV-1 Tat38-61 epitope. We used primers containing the random nucleotide sequences, and introduced the random mutations at the sites of 51 and 55 amino acids coding sequences into full-length Tat sequences by overlapping PCR. With the randomly mutated full-length Tat as template, the Tat38-61(51N/55N) mutants which contained recognition sequences for the Xba I in both ends were amplified by PCR using the designed primers. The mutants were cloned into Xba I site in the phagemid vector pCANTAB5S, then the recombinants were transformed into E. coli TG1, a phage-displayed the random mutation library of Tat38-61(51N/55N) was constructed by the rescue of help virus M13KO7. The results showed that the library consisted of about 5.0 x 10(6) colonies and the phage library titer was 2.65 x 10(12) TU/mL. More than 56.50% colonies in the library were positive for insertion. Sequence analysis showed that the nucleotides encoding amino acids at the sites of 51 and 55 distributed randomly. The constructed mutation library could meet the requirements for the following molecular evolution screening, and might prepare the Tat mutants for the further study of new Tat vaccine candidates.
AIDS Vaccines ; immunology ; Escherichia coli ; genetics ; metabolism ; HIV-1 ; genetics ; Humans ; Mutation ; Peptide Fragments ; biosynthesis ; genetics ; immunology ; Peptide Library ; Recombinant Proteins ; biosynthesis ; genetics ; immunology ; tat Gene Products, Human Immunodeficiency Virus ; biosynthesis ; genetics ; immunology

Objective:Under the guidance of evidence-based theory, the discharge preparation intervention plan for stroke patients was constructed, in order to provide a reference for improving the discharge preparation of stroke patients.Methods:To retrieve the relevant guidelines, consensus, literature and quality evaluation, summarize relevant evidence and evaluate the first draft of the intervention plan, implement two rounds of expert enquiry, according to the expert score and opinions, and improve the entries after the group discussion to form the final intervention plan.Results:In the two rounds of correspondence, the expert positive coefficient was 100%, the expert authority coefficient was 0.81 and 0.84 respectively, and the Kendall harmony coefficient of each entry was 0.165 and 0.453 respectively. The difference was statistical significant ( P<0.05). The ultimate in intervention plan included 6 primary entry, 23 secondary entries. Conclusions:The discharge preparation intervention plan for stroke patients constructed in this study is scientific, reliable and feasible, and is of great significance to improving the discharge preparation of stroke patients.

An epidemiological investigation was carried out on a local cluster of outbreak caused by imported cases of Coronavirus Disease 2019 (COVID-19) in rural areas of Chengdu in December 2020, to find out the source of infection and the chain of transmission. According to
COVID-19 ; Disease Outbreaks ; Epidemics ; Humans ; Quarantine ; SARS-CoV-2