抗溃疡药瑞巴匹特的合成

目的：合成抗溃疡药２－（４－氯苯甲酰胺基）－３－（１,２－二氢－２－氧代－４－喹啉基）丙酸）瑞巴匹特）。方法：以乙酰乙酰苯胺为起始原料,经溴化,成环,取代,酸解,及缩合等五步反应合成该化合物。结果：合成产物经元素分析,经外光谱,核磁共振谱,质谱等确证。结论：此合成路线是完全可行的。     

Ascorbic acid prevents cimetidine-induced decrease of serum hydrocortisone concentrations

A blind, parallel, prospective, clinical study was conducted to investigate the effect of ascorbic acid on human serum hydrocortisone concentrations which were decreased by the administration of cimetidine. The study population included 16 male adults scheduled for major abdominal vascular surgery. The study was conducted in surgical patients under anaesthesia, in which steroidogenesis was inhibited by cimetidine. The results showed a reduction in serum hydrocortisone concentrations in patients receiving a placebo. In patients receiving ascorbic acid, there was a significant increase in serum hydrocortisone concentration. This reflects the normal serum hydrocortisone profile for this operation and anaesthetic technique. Cimetidine can bind to cytochrome P-450 covering the active haem group, the cytochrome proves to be of vital importance for hydroxylation reactions, involved in human steroidogenesis. Serum hydrocortisone concentrations will decrease when cytochrome P-450 becomes blocked. Intravenous administration of ascorbic acid was supposed to cause relief for this decrease. The reasons are undetermined yet. This investigation proved that ascorbic acid can prevent cimetidine-induced decrease of human serum hydrocortisone concentrations.     

Glimpsing undergraduate research from the view of the advisors of Nursing scholarships

This research aimed at understanding the meaning of undergraduate research for supervisors of Nursing scholarship students in a university in the South of Brazil. The methodological reference used was the Grounded Theory, by the means of interviews with seven undergraduate research scholarship advisors forming two sample groups. The phenomenon "glimpsing undergraduate research activities of research groups coordinated by nursing advisors, the basis of competency formation in research of the scholarships" emerged form the interrelation of six categories. To be a advisor and researcher of human resources in research form undergraduation requires pedagogical, instrumental, and managerial competencies associated to research policies of nursing and health.     

无佐剂和添加HF59佐剂的流感病毒A／H9N2疫苗的安全性和免疫原性

背景：流感病毒A／H9N2毒株可以感染人体并且有引起爆发流行的危险。现在急需预防包括这种病毒在内的禽流感病毒感染的有效疫苗。     

Reliability of the cloned-enzyme donor immunoassay (CEDIA) for cocaine in human serum in the range between the detection limit and the cut-off

Immunoassays are used worldwide for the rapid screening of drugs. Despite the fact that they are highly valuable tools for the testing of legal and illicit drugs, there is a non-negligable risk of false-positive and false-negative findings and many pitfalls must be taken into account when using these tests in an uncritical manner and without valid confirmation procedures. In order to check the correlation between cloned-enzyme donor immunoassay (CEDIA) readings and exact determined gas chromatography/mass spectrometry (GC/MS) values for benzoylecgonine, a total of 472 serum samples was measured with an immunoassay (CEDIA) as well as GC/MS. As a result, it was shown that in the lower area of concentration, up to approx. 300 ng equ. benzoylecgonine/ml, there is a semiquantitative useful correlation. With higher concentrations, the values shift more and more apart and many runaways are visible. Generally the use of tests for materials other than those declared is excluded from the manufacturer's warranty and is at the user's own risk, but the authors found that many immunochemical tests with a certification only for the use in urine are well suited to the screening of serum samples, and even low readings could be confirmed by GC/MS. With blood or serum as sample, it could be regularly observed that generally very small readings could not only be confirmed with mass spectrometry but could in most cases also be quantified. This was the key factor in determining the rate of confirmation in 495 cases. In total, an incredibly high reliability for the CEDIA cocaine test (via benzoylecgonine) was shown up to the area of detection (detection limit), far below the cut-off. These results confirm the extraordinary sensitivity and specificity of this test also for blood or serum as sample material to be tested.     

Perceptions of medical school seniors of the current changes in the U.S. health care system

Perceptions of medical school seniors about changes occurring in the health care environment were investigated. A survey was completed by 196 Jefferson Medical College seniors in the class of 1997. Of the respondents, 79% believed that cost reduction rather than quality of care is the primary consideration behind recent changes, 78% felt that managed care organizations hamper physicians' abilities to render optimal care, 83% maintained that the control of health care by insurance companies would lead to lower quality of care, 69% agreed that patients should have the freedom to seek a specialist's care without being referred by a primary care physician, 82% recommended that mentally ill patients should be referred to a mental health professional, and 82% believed that learning to work in a managed care environment should be an essential component of medical education. Assessment of student perceptions can assist in the development and implementation of appropriate curricular changes.     

Establishment of a Modified in Vitro Cultivation of Protoscoleces to Adult Echinococcus granulosus; an Important Way for New Investigations on Hydatidosis

Background

Echinococcus granulosus, a zoonotic cestode parasite, causative agent of hydatid cyst is endemic in many parts of the world including the Middle East. Study on different aspects of this parasite is very important and valuable. However, working with adult worms which their habitat situated in the small intestine of canids, is dangerous and risky. Achieving such risky situation needs a controlled condition which is cultivation of the organisms in the laboratory. In this regard, cultivation of E. granulosus protoscoleces leading to adult worms was established in the laboratory for the first time in Iran.

Methods

Under aseptic conditions a number of protoscoleces were cultivated in diphasic S.10E.H medium using CO2 incubator to produce adult worms.

Results

Different forms of parasites including pre-segmentation stages (PS1 - PS4) and segmentation stages (S5-S8) and developing stages in segmented worms (S10-S11) were observed and evaluated in these medium. Finally adult worms contained four proglottids with a large and distinct genital pore were observed 50-55 days post cultivation. These parasites do not produce fertile eggs and conclusively do not have risk of hydatid disease transmission to the researchers.

Conclusion

The mentioned method for producing E. granulosus adult worms can open a new window for researches and facilitate working on different aspects of hydatidosis especially for diagnosis, protection and treatment studies.     

The meaning of the performance of the Family Health Strategy team in a socially vulnerable community

This study sought to understand the meaning of the performance of a Family Health Strategy team in a socially vulnerable community. Grounded Data Theory was used as a methodological benchmark and the data collection technique consisted of interviews with twenty-five Family Health Strategy professionals between July and December of 2009. Data analysis revealed that the Family Health Strategy can be seen as a facilitator and stimulator of the process of expansion and consolidation of healthcare networks. They represent a new approach in community intervention, by viewing the human being as a multi-dimensional and singular being, inserted in his/her real context. A new assistential model is essentially being developed by the reorganization of healthcare practices, assisted by the multiplicity of complex relationships, interactions and associations that occur within the social and family context.     

Impact of 18F-fluorodeoxyglucose positron emission tomography in the staging and treatment response assessment of extra-pulmonary small-cell cancer

The aim of this study was to retrospectively evaluate the value of ¹⁸F-fluorodeoxyglucose (FDG) positron emission tomography (PET) in extrapulmonary small-cell cancer (EPSCC). Patients with EPSCC who underwent PET for staging or response assessment between 1996 and 2007 were identified from a database. Patient records were reviewed. PET-based, and conventional staging and restaging results were compared. The binary staging classification of limited disease (LD) versus extensive disease (ED) was used. Patients with LD had tumours that could be encompassed within a tolerable radiation therapy (RT) volume. Of 33 eligible patients, 12 had staging PET scans, 11 had restaging scans and 10 had both. All known gross disease sites were FDG-avid. PET and conventional stage groupings were concordant in 21 of 22 cases. One patient was appropriately upstaged from LD to ED by PET. PET detected additional disease sites, without causing upstaging in three further patients. Restaging PET scans identified previously unrecognised persistent or progressive disease in 4 of 21 cases. In four further cases, persistent FDG uptake after treatment was either false positive (n = 2) or of uncertain (n = 2) aetiology. PPV was 100% for staging and 82% for restaging. In 8 of 43 imaging episodes (19%), PET appropriately influenced management in five cases by changing treatment intent from radical to palliative, and in three cases by altering the RT volume. PET has incremental value compared to conventional imaging for staging EPSCC, and may also be useful for restaging after therapy. PET influenced patient management in 19% of 43 imaging episodes.