Objective To study the method for determination of nipacide PX and triclosan in disinfectant by high performance liquid chromatography. Methods High performance liquid chromatography, based on the mobile phase (CH3CN:H2O=60:40, pH=3.0) and diode array detector(DAD, ?= 280 nm), was chosed to determine nipacide PX and triclosan in disinfectant. Results The detection limit of nipacide PX was 2.48 ng and triclosan was 2.08 ng. The rate of recovery was 95.4%-103.3%,the relative standard deviations(RSD) was 0.6%-3.4%. Conclusion The method is simple, precise and suitable for the determination of nipacide PX and triclosan in disinfectant.

Objective To observe the morphology, cell viability and secretion function of catecholamine of the alginate-polylysine-alginate (APA) microencapsulated bovine chromaffin cells (BCCs) before and after cryopreserving with liquid nitrogen. Methods The APA microencapsulated BCCs were cryopreserved with dimethyl sulfoxide as cryopreservative agent by slow cooling and rapid rewarming for revivification. The change of cell function was observed by detecting the cell viability and secretion of catecholamine. Results As compared with the precryopreseving cells, the morphology and cell viability of the resuscitated APA microencapsulated BCCs showed no significant change. The catecholamine secretion volume of BCCs remained 80% of that by the precryopreserving cells. Conclusion It demonstrates that the resuscitated cryopreserved APA microencapsulated BCCs still remained good morphology, cell viability and secretion function of catecholamine.

Leber's hereditary optic neuropathy (LHON) is an inherited mitochondrial disorder characterized by bilateral progressive vision loss.Current management includes therapies directed at enhancing mitochondrial function and preventing oxidative damage.This article reviews the progress of treatments from mitochondria cocktail,idebenone,gene therapy,EPI-743,brimonidine,traditional Chinese medicine and physical therapy,providing a new insight in the treatments of LHON.

Based on the problems of the medical software laboratory such as heavy workload of software superposition management and maintenance,low resource utilization rate,difficulty in sharing,the paper takes Shanghai University of Medicine & Health Sciences as an example to introduce the construction of cloud desktop medical software laboratory based on the cloud computing technology,and analyze the using experience.This laboratory helps save costs,simplify deploymem,reduce the intensity of management work,so as to better serve for teaching.

OBJECTIVE:To optimize extraction technology of saponins from Paris polyphylla. METHODS:Using paris sapo-nin Ⅰ,paris saponin Ⅱand Paridis total saponin as dependent variables,using ethanol volume fraction,extraction time and sol-vent amount as independent variables,through multiple linear regression and binomial fitting,the extraction technology was opti-mized with response surface method and predicted. RESULTS:The optimized extraction technology of saponins from P. polyphylla was as follows as 10-fold of 80% ethanol,2 times reflux extraction,100 min each time. Under the extraction technology,the ex-traction rates of paris saponinⅠwere 85.4%,82.7% and 87.1%;those of paris saponinⅡwere 85.9%,81.3% and 83.6%;and those of Paridis total saponin were 89.5%,92.1% and 90.3%(all RSD<2.0%). Measured value was 0.964 9,predicted value was 0.986 0 and deviation rate was 2.14%. CONCLUSIONS:The central composite design-response surface method is simple and reliable for the optimization of extraction technology of saponins from P. polyphylla.

BACKGROUND: Diabetic retinopathy is a commonly chronic-vascular complication in a course of diabetes mellitus (DM), and its relation with apoptosis and changes of ion level needs to be proved.OBJECTIVE: To observe apoptosis and changes of Na+ and K+ contents in retinal tissue of DM rats.DESIGN: Randomized controlled study.SETTING: Department of Ophthalmology, Liuzhou Municipal People's Hospital.MATERIALS: The experiment was completed at the Department of Ophthalmology, Liuzhou Municipal People's Hospital. A total of forty adult male Wistar rats, aged 20 months, weighing 320-350 g, were provided by Animal Center of Medical College Affiliated to Sun Yat-sen University.METHODS: Forth Wistar rats were randomly divided into control group and experimental group with 20 in each group. Streptozotocin was used to induce DM in the experimental group. Apoptosis and changes of Na+ and K+ contents in retinal tissue were measured on the 4th, 6th, 12th and 16th weeks after DM onset. Rats in the control group were injected only with the same volume of citrate buffer solution. Then, correlations on the aspect of fasting blood glucose (FBG), hemoglobin glycosylation (HbAlc), Na+ and K+ contents and DM course were analyzed between the two groups.MAIN OUTCOME MEASURES: ① Na+ and K+ contents; ② FBG concentra tion and HbAlc level; ③ changes of apoptosis; ④ correlations among markers.RESULTS: Apoptosis could be detected in retinal tissue in the experimental group at 4 weeks after DM onset, and with course elongating, level of apoptosis was aggravated gradually. Na+ concentration was increased in retinal tissue, but K+ concentration was decreased (P ＜ 0.01 or 0.05). Levels of apoptosis in retinal tissue in the experimental group were positive correlation with FBG concentration, HbAlc level, Na+ content and DM course (r=7.584, 7.844, 7.369, 6.246; P ＜ 0.01); however, they were negative correlation with K+ content in retinal tissue (r=7.658, P ＜ 0.01).CONCLUSION: There are apoptosis and abnormal Na+ and K+ contents in retinal tissue of DM rats. Moreover, these changes may be one of pathological bases of diabetic retinopathy.

Objective To investigate the current situation and development of geriatrics in Jiangsu Province, and to find out the characteristics and trend in development of geriatrics in Jiangsu Province. Methods The literatures in geriatric field of Jiangsu Province from 1998 to 2007 were collected from the database, www. cnki.net. Bibliometric methods and Mann-Whitney Test (performed by SPSS) were used to analyze the distribution of time, area, author, fund and discipline of the literatures. Results The total number of the literatures about geriatrics of Jiangsu Province from 1998 to 2007 was 4623, accounting for 7.72% of the total number of the literatures about geriatrics of China. The number of the literatures in South Jiangsu was the highest, followed by North Jiangsu and Center Jiangsu (P＜0.001). The authors publishing only one article made up 81.51% of the total number of the authors. The literatures with cooperating affiliations made up 12.24% of the total literatures. There were 212 literatures with research sponsorship. The literatures in geriatrics of Jiangsu province covered 39 subjects, and the literatures about cardiovascular diseases accounted for 14.56%. Conclusions Geriatrics in Jiangsu province shows a slow development and an imbalance between different areas and subjects. The core author team does not exist. This suggests that Jiangsu Province should increase the investment, and carry out a large and cooperating researchplan to promote the development of geriatrics in Jiangsu province.

The left lateral incisor with occlusal soreness of a 30-year old female was examined and treated.Radiographic examination re-vealed periradicular radiolucency around the apical and 3 canals.The 3 root canals were treated by root canal therapy,the tooth was restored by all-ceramic crown for the prevention of fracture.12 month follow-up showed that the treatment was effective.

This study was to investigate the relationship of dose-effect and time-effect of Alginate-Polylysine-Alginate (APA) microencapsulated bovine chromaffin cells on the treatment of pain model rats. Using a rat model of painful peripheral neuropathy, the antinociceptive effects of APA microencapsulated bovine cells transplanted into the subarachnoid space was evaluated by cold allodynia test and hot hyperalgesia test. Compared with control group, the withdrawal difference with cell number 50 thousands groups, 100 thousands groups and 200 thousands groups was reduced (P < 0.05), and the difference decreased with the cells increases, indicating a significant analgesic effect. There was no significant difference between 400 thousands groups and 200 thousands groups. This analgesic effect maintained longer than 12 weeks. There was a positive correlation between the analgesic effect and the quantity of APA microencapsulated bovine chromaffin cells which were transplanted to treat pain model rats, and the effective antinociception remained longer than 12 weeks.
Alginates ; administration & dosage ; pharmacology ; Analgesia ; methods ; Animals ; Cattle ; Chromaffin Cells ; transplantation ; Dose-Response Relationship, Drug ; Drug Compounding ; Implants, Experimental ; Pain Management ; methods ; Polylysine ; administration & dosage ; analogs & derivatives ; pharmacology ; Rats ; Sciatica ; therapy

Medical whole-body positron emission tomography (PET), one of the most successful molecular imaging technologies, has been widely used in the fields of cancer diagnosis, cardiovascular disease diagnosis and cranial nerve study. But, on the other hand, the sensitivity, spatial resolution and signal-noise-ratio of the commercial medical whole-body PET systems still have some shortcomings and a great room for improvement. The sensitivity, spatial resolution and signal-noise-ratio of PET system are largely affected by the performances of the scintillators and the photo detectors. The design of a PET system is usually a trade-off in cost and performance. A better image quality can be achieved by optimizing and balancing the key components which affect the system performance the most without dramatically increases in cost. With the development of the scintillator, photo-detector and high speed electronic system, the performance of medical whole-body PET system would be dramatically improved. In this paper, we report current progresses and discuss future directions of the developments of technologies in medical whole-body PET system.
Humans ; Positron-Emission Tomography ; trends