The fortified milk powder is dissolved in 0.05M K2HPO4 buffer solution, adjust pH to 4.5, and centrifuge for 20 minutes. The supernatant is then adjusted to pH 4.0, go through CGS resin column using 10ml KC1-K2HPO4 as eluant. The eluate is collected as testing solution and injected to HPLC. Column: ODS; mobile phase; 0.05M K2HPO4 : CH3OH (91:9); ultraviolet detector: 285nm. CV% is 3.3% and recovery 87%.

Objective: The theory and repair summary of infusion pump were introduced to improve its maintenance and usage by taking SK-600I infusion pump as an example. Methods:With the cases from practical works including faults such as under-pressure alarm, bubble alarm, block alarms and rate accuracy problem, true or fault respectively, the principle, maintenance, attention issues, fault analyses and repairing methods of infusion pump were presented. Results:To help operators and technicians deal with all kinds of pump failures. Some advices on improving theSK-600I infusion pump design were provided. Conclusion: Infusion pump is a high intelligent medical device, but improper use, mechanical and electrical fault will put adverse impact on its application. Mastering the basic principles, summarizing practical experiences, strengthen operator training, can make better use of infusion pump.

Objective To study the efficacy of antibiotic prophylaxis in old patients with negative urine cultures,who were submitted to transurethral prostate resection(TURP).Methods One hundred and twenty old benign prostatic hyperplasia(BPH) patients with sterile urine were divided into two groups(60 patients in each group) randomly.Antibiotic group received empirical venous antibiotics 4 days postoperative.Control group received 5% glucose saline as placebo.Their postoperative infection-associated parameters were compared.Results There were no significant differences between two groups in bacteriuria and infection-associated complications at the 28th day postoperatively.The ratio of bacteriuria in antibiotic group decreased significantly at postoperative at the 4th day when compared with that of control group.The bacteriuria at postoperative at the 4th day had no specific correlation with the long-term bacteriuria,the clinical observation of bacteremia and urinal tract infection,or the culture of prostatic tissue chip.Conclusions Antibiotic prophylaxis reduces the early postoperative bacteriuria for old patients with sterile urine before TURP,but its effectiveness for postoperative infectious complications is debatable.The antibiotics according to empirical validity are not specifically sensitive to the bacteria from various sources.

Objective To study the role of plasma levels of gastrointestinal hormones and gallbladder kinetics in the pathogenesis of functional dyspepsia. Methods Thirty two patients with functional dyspepsia (FD) and 20 normal subjects as controls were studied. Gallbladder ejection fractions (GBEF) were determined with 99m Tc radionucleography, and plasma levels of motilin (MTL)、cholecystokinin (CCK)、 vasoactive intestinal peptide (VIP) and somatostatin (SS) were measured with radioimmunoassay. Results Both preprandial and postprandial GBEF and MTL levels were markedly lower in FD group than those in control group ( P 0.05), while the levels of postprandial CCK were significantly decreased in FD group ( P 0.05). Conclusion (1) Patients with FD might have a decreased level of preprandial and postprandial gallbladder emptying. The decrease of plasma levels of MTL、CCK and the elevation of VIP might be the cause of gallbladder slow emptying in FD. (2) Radionucleography is non invasive and safe. It can be used in the quantitative analysis and dynamic study of gallbladder and Oddi sphincter functions, and provide accurate, physiological results.

Objective To investigate the effect of GnRH-A in gastric cavity on the function of somatostatin cells in the digestive tract of rats. Methods The immunohistochemical ABC method and enzyme-link immunoassay were used in the experiment. Results The densities of the somatostatin positive cells in the stomach and duodenum of the experiment groups were 26^6?3^893 and 51^7?2^214 respectively,and significantly lower than those in stomach 48^3?6^019 and duodenum 58^5?4^454 of control groups respectively(P

The effects of different technicological processes on the dissolubility of enteric coating aspirin tablets were studied. With testing in vitro, significant differences were found among three kinds of tablets from four factories in dissoluble feature. The length of time needed for release and that for disintegration of tablets from Factory C were 90 minutes and 5 minutes repectively, which were the shortest,and those from Factocy B, 210 minutes and 120 minutes repectively,which were the longest among three kinds of tablets. The average dissoluble amount of aspirin contained in tablets from Factory C was 74.07％;Factory D,74. 51％; Factory A, 66.6％; and Factory B, 62.51％. All the parameters determined were statistically different among three kinds of products by analysis of varianee(p

Objective To evaluate the diagnostic value of per perineal high -frequency ultrasound and/or per rectal endoscopic ultrasound in anorectal diseases. Methods 54 patients suffered from anorectul diseases, including 22 patients with anal fistula, 14 patients with perianal abscess, 12 patients with rectal cancer, and 6 patients with perianorectal inflammation, were performed with per perineal high-frequency ultrasound and/or per rectal endoscopic ultrasound examination. The diagnostic results were confirmed by clinical diagnosis, including operative and pathological detection. Results Except for the misdiagnosis of 4 cases of orifice location and 1 case of rectal cancer, all the other cases were correctly diagnosed. Conclusion Combined application of per perineal high-frequency ultrasound and per rectal endoscopic ultrasound examination has great practical value for ascertaining the trend and internal orifice location of anal fistula, location of perianul abscess, the infiltration depth of rectal cancer, and lymph node metastases.

BACKGROUND:After co-culture with osteoblasts, bone marrow stem cells can be induced to differentiate into osteoblasts. Whether adipose-derived stem cells co-cultured with osteoblasts can differentiate into osteoblasts or not? OBJECTIVE:To observe whether adipose-derived stem cells co-cultured with osteoblasts can differentiate into osteoblasts. METHODS:Adipose-derived stem cells and osteoblasts were isolated from New Zealand white rabbits. Then, passage 3 adipose-derived stem cells were co-cultured with passage 2 osteoblasts in 10%or 5%fetal bovine serum for 14 days. RESULTS AND CONCLUSION:After 7 days of co-culture, some adipose-derived stem cells became round in the two groups. After 14 days of co-culture, adipose-derived stem cells highly differentiated and differentiated cells were similar to mature osteoblasts that were positive for alkaline phosphatase staining and alizarin red staining. The mRNA expression of type I col agen and osteocalcin increased in both two group, especial y in the 10%fetal bovine serum group. These findings indicate that adipose-derived stem cells co-cultured with osteoblasts can differentiate into osteoblasts induced by high-concentration serum culture.

E-health is a new kind of health care model, which raises medical efficiency, brings happiness and hope to the therapy of severe disease, and stands for the future of health care. However, it is faced with many issues and challenges, such as the safety of information storing, privacy protection and the distribution of health resources.Therefore, research & development in e-health should observe some criterion. The author holds that the development of e-health should observe ethical principles such as inform-concent, safety, justice, risk-benefit and developing step by step, and puts forward regulating recommendations in many aspects.