OBJECTIVE:To validate the feasibility of nonaqueous perchloric acid titration and high performance liquid chromatography(HPLC)for the determination of the content of dipyridamole.METHODS:In the nonaqueous titration,the titration end-point was indicated potentiometrically,and the effects of different solvents on the titration were investigated.As to HPLC method,the separation of sample was performed on C18 column with the mobile phase consisted of acetonitrile-20 mmol?L-1 potassium dihydrogen phosphate(containing 1.0% triethylamine,adjusted pH to 4.0 with phosphoric acid,35∶65).The potassium bromate titration stated in Chinese Pharmacopoeia was taken as the reference.RESULTS:By nonaqueous titration,HPLC and potassium bromate method,the contents of dipyridamole were 101.36%,101.11% and 100.56%,respectively.CONCLUSIONS:Both nonaqueous titration and HPLC methods are suitable for the determination of the content of dipyridamole in its pharmaceutical products.Compared with potassium bromate titration,nonaqueous titration is more simple and convenient.

HIV/AIDS has been circulating in China for over 25 year. While making progress and achievements on HIV/AIDS prevention, there still are great challenge and difficulties such as HIV epidemic controlling and vaccine research.

Acquired Immunodeficiency Syndrome ; prevention & control ; China ; Humans ; Infectious Disease Medicine ; methods ; trends

This paper reports a method for direct determination of ascorbic acid by ultra-violet differential spectrometry and its application to analysis of ascorbic acid contents in vegetables, fruits and tablets. All the four (1st to 4th) derivatives of spectrometry were available for determination, and the better results were obtained from the 2nd derivative spectrometry. The results showed that this method was simple, rapid and accurate.

Based on X86 architecture,a specialized software system was developed for liver teaching,imaging diagnosis and treatment.With MAYA as 3D modeling tool and DirectX3D as major virtual technology,a virtual liver model was created assisted by artificial intelligence and J2EE network communication.In addition,a virtual reality workstation about liver was established based on advanced modelling technology,human-computer interaction and database system to achieve a three-dimensional visualization of the liver on the virtual reality workstation.This system offers a feasible project for real-time chiri-cal consmlfation and teaching,and provides an extensive application of liver study under virtual condition.

[Purpose] To observe the clinical effects, relapse rate and security of treating the verruca plana with the cure warts capsules combined with Burt's res-q ointment. [Methods] Eighty patients with verruca plana were randomly divided into two groups. Forty patients in the combination group received cure warts capsules combined with Burt's res-q ointment; others in the control group received 0.1% al-transretinoic acid cream only. The courses of treatment of two groups was four weeks, then observe the number of verruca plana and bad reaction after the treatment, and record four weeks fol ow-up observation of relapse. [Results] The effective rate of treatment group was 92.50%which was significantly higher than the control group that the effective rate was 50.00% , and the former’s relapse rate was 3.40% which was significantly lower than that in the group which was 44.40% , the above showed significant difference(P<0.05).There was no significant side effects in the two groups. [Conclusion] Cure warts capsules combined with Burt's res-q ointment had better effect, low relapse rate and high safety.

Objective To explore whether ganoderma spores could help the neural epithelial cell of embryonic neural tube stagnated by retinoic acid in G-0/G-1 phase reenter the cell cycle,keep on proliferating and differentiating,and could reduce the occurrence of neural tube defects(NTDs). Methods When E7.75d,mice of the control group and the ganoderma spores group were given intragastrically onetime retinoic acid all-trans.Then the ganoderma spores solution was given intragastrically to the ganoderma spores group.At E10.5d,The embryos of the two groups were taken out and the ratio of NTDs was counted respectively Immunofluorescence histochemistry and flow cytometry were applied to examine the expression of nestin,and DNA quantity staining and RT-PCR to detect the mRNA transcriptions of Cdk2 and Cdk4. Results The radio of NTDs in the ganoderma spores group was lower than that in the control group remarkably,but the level of nestin was higher.With the neural tube cell cycles compared the cell radio of G-0/G-1 phase in the control group was higher than that in the ganoderma spores group,while the ratio in the S phase in the control group,it was lower than that of the normal embryos in the ganoderma spores group.The neural epithelial cell of embryonic neural tube in the ganoderma spores group could transcript Cdk4 mRNA normally,with a low transcription rate in the control group.Conclusion Ganoderma spores can reduce the occurrence of embryonic NTDs induced by retinoic acid in pregnant mice.

Objective To construct a yeast expression vector containing human TIP60? gene (a spliced form of HIV-1 tat interactive protein,HTATIP,60?103) and screen its interaction proteins by yeast two-hybrid. Methods Human TIP60? gene fragment was amplified by RT-PCR and cloned into pGBKT7 vector. Using TIP60? as bait,the proteins interacting with TIP60? were screened from a human liver cDNA library. The positive clones were analyzed by bioinformatic methods. Results Human TIP60? cDNA was successfully amplified and cloned into the pGBKT7 vector and indentified by double enzyme digestion and DNA sequencing. Using yeast two-hybrid,32 clones were screened from a human liver cDNA library,and 9 positive clones including histone deacetylase 7A (HDAC7A),mouse double minute 2 (DMD2),B-cell CLL/lymphoma 3 (BCL3),endothelin receptor type A (EDNRA),androgen receptor (AR),PHD finger protein 17 (PHF17),Ataxia Telangiectasia Mutated (ATM),CAMP responsive element binding protein 1 (CREB1),orphan steroid receptor BD73 were verified after sequencing. Conclusion The screened interaction proteins with TIP60? by yeast two-hybrid may be involved in the roles of transcriptional regulation of TIP60?.

Objective To evaluate the treatment effects on schistosomiasis hepatic fibrosis with Dangguibuxue decoction.Methods Thirty-four rabbits weighing 2.0-2.5 kg were selected.The procedure for the model of schistosomiasis liver fibrosis was as follow.Thirty-four snails infected by schistosoma japonicum were placed in triangle flask to escape cercariain.Abdominal skin of each rabbit wag infected by 100 schistosoma japonicum cercariaes.All rabbits were housed in conventional cages at room temperature.After 13 weeks schistosoma japonicum infected,the rabbits'livers were examined by B-ultrasound examination every week.After 18 weeks of infection,B-ultrasound showed images of schistosomiasis liver fibrosis,the rabbits were thus identified as schistosomiasis liver fibrosis.Praziquantel Was as insecticide to treat rabbits.All rabbits were divided into treatment and control groups according to body weigh.The high and low dosage group were treated with Dangguibuxue decoction at 50 g/kg and 5 g/kg(n=11),respectively,and the control group with no treatment(n=12).Two groups were treated with Dangguibuxue decoction every day for 10 weeks.After 10 weeks of treatment,the rabbits were killed and the livers were obtained to go HE staining and histopathological examination under microscope.Results After 18 weeks of infection,B-ultrasound showed that the liver parenchyma Was coarse and net-shaped.having hyperechoie spots with lightbrand and facula.The liver's shape Was abnormal,portal and splenic vein diameter was widened.Histopathological examination showed that the high dosage group presented fibrosis,which was formed by collagen fiber extending to peripherM regions,low dosage group showed mild fibrosis,mild collagen fiber present with extension without compartment formation, while the control group presented severe fibrosis and severe collagen fiber present with a thickening of the partial compartments and the distribution of eggs nodules. The liver histopathological ranking results from different groups showed that the difference was significant (χ2= 13.585,P < 0.01), the difference between the treatment groups of high and low dosage and control group was significant,respectively(all P < 0.01 ). Conclusions The histopathology results showed that both high and low dosage Dangguibuxue decoction can reverse or eliminate schistosomiasis liver fibrosis in rabbits.

Aged ; Aging ; Health Services for the Aged ; Humans