Telematics in undergraduate teaching

The use of telematics in the practice of medicine has received much recent attention but little has been written about the use of these techniques in medical education. This is a report of a pilot study in which an interactive video-conference took place between medical students at the UAE University and their opposite numbers at Aberdeen University. In Aberdeen, the Dean of the Medical Faculty simultaneously taught Aberdeen and UAE students on a clinical case. He was able to confine his activities largely to the correction of misconceptions, the emphasis of important points and the addition of missing information, while the students themselves conducted most of the presentation. The UAE students presented their Community Health projects and had a spirited discussion on them with the Aberdeen students. Recent technological advances have so improved the quality of transmission of both visual and auditory images and at reasonable cost, using the ISDN telephone system, that the feasibility of using this medium as an aid to teaching has suddenly materialized. The experiment showed that the technology was adequate for easy, fully interactive teaching among students from different continents and with different cultural backgrounds. It is particularly suitable for the Arab world where it is the custom to teach males and females separately. The pilot study has pointed out the existence of a medium of communication and teaching which, if proved to be effective, could have far-reaching consequences in the undergraduate and postgraduate teaching of medicine.     

Cytoskeleton-mediated, age-dependent lateral topography of lectin-gold-labelled molecules on the plasma membrane of cultured neurons: a statistical view

In dissociated spinal cord neurons (12-day-old mouse embryo, monolayer culture), an electron microscopic study was carried out to examine quantitatively the rearrangement of wheat-germ agglutinin-gold-labelled molecules on the neuronal somatic surface at two developmental stages (on the fifth and 15th days in vitro), and after cytoskeletal interruptions. In tests, before labelling the cultures were incubated with colchicine or cytochalasin in order to affect microtubules or mostly actin filaments, respectively. Samples of electron micrographs that display soma membrane (profile) fragments were quantified. A set of stochastic geometry approaches was accomplished, which allowed statistical and stereological analysis of labelling. Images that illustrate the lateral (surface) patterns of label were simulated. On the fifth day in vitro, both colchicine and cytochalasin were found to cause an increase in the surface density and aggregation of wheat-germ agglutinin label relative to controls, the effect of cytochalasin being significantly more profound. By the 15th day in vitro, treatment with both drugs led to a similar tendency towards heavy aggregation of wheat-germ agglutinin labels. In contrast, neuron processes showed an opposite tendency of label rearrangement, which suggests lateral migration of labelled molecules, as a result of drug action. Possible molecular mechanisms involved in the phenomena are discussed.     

Methods of Antibiotic Applications as Related to Microbial Quality of Lamb by PCA and Bioluminescence

The effects of different methods of application of chlortetracycline and oxytetracycline on microbial properties of lamb meat were studied. A significant antibacterial effect of antibiotic was found on total mesophilic bacteria count. The mesophilic bacteria level was determined by two methods: the conventional method using Plate Count Agar and bioluminescence. Correlation curves of the CFU and RLU values proved two methods were highly related. Thus for the microbiology quality of meat hygiene the bioluminescence method may be used as a fast and alternative method to PCA. Note that bioluminescence requires a higher degree of skill and attention.     

Practical DfT strategy for fault diagnosis in active analoguefilters

A DfT methodology for fault diagnosis in active analogue filters is presented that is capable of diagnosing single and multiple faults. Its applicability is very simple and its cost is low     

Oscillation-based test in bandpass oversampled A/D converters

This paper extends a study performed by the authors in previous papers dealing with the OBT approach applied to low-pass modulators ‘Microelectron. J. 33/10 (2002) 799’, showing herein the specific features associated to the bandpass case. A practical feedback strategy will be proposed in order to built an effective oscillator, which can be valuable for testing purposes. Critical points of the proposed OBT solution will be considered in order to establish useful guidelines to apply this test approach to generic bandpass ΣΔ modulators.     

A trial of the long-term use of Sedacorone (amiodarone) under polyclinic conditions for the prevention of paroxysms of atrial fibrillation

Sedacorone (amiodarone) was given to 70 outpatients with coronary heart disease for 1.5-2 years to prevent paroxysms of cardiac arrhythmia after recovery of sinus rhythm. Sedacorone was administered initially in the dose 600 mg/day for 10-12 days, then the dose lowering was adjusted to the tolerance, heart rate and ECG readings. The minimal dose of 200 mg/day was taken for 5 days a week with a 2-day interval. In adequate individual dose Sedacorone prevented paroxysms of cardiac fibrillation or made the paroxysms less frequent in 91.4% of patients. Careful selection of patients and regular control helped avoid serious cardial and extracardiac complications. Sedacorone is recommended as a first-line medicine for outpatients with frequent paroxysms of cardiac fibrillations after recovery of the sinus rhythm to prevent the paroxysms recurrences.     

High-Temperature Rotational Transitions of Water in Sunspot and Laboratory Spectra

Assignments are presented for spectra of hot water obtained in absorption in sunspots (T approximately 3000°C and 750 相似文献   

New analogue switch circuit having very low forward resistance

A new circuit realisation for an analogue switch is reported. The main feature of the proposed design is the low value of the forward resistance as compared with commercial switches. Experimental data confirming the performance of the circuit are also included.     

Antitumor gene therapy using suicide genes]

Successful autologous bone marrow transplantation (ABMT) and peripheral blood stem cell transplantation depend on safe hematopoietic stem cell (HSC) cryopreservation and storage. Several successful methods for cryopreservation and storage have been established and are commonly used all over the world. However, little is known about the effects of long-term cryopreservation on the capacity to sustain a complete immunohematopoietic engraftment. Several authors have investigated stem cell viability after cryopreservation and storage for more than 5 years and reported preclinical good viabilities in terms of dye-exclusion or colony-forming capability in vitro. Only two studies using BM cryopreserved for more than 5 years for transplantation are reported, but they did not provide proof of trilineage engraftment. In February 1997 at our institution, a patient with relapsed non-Hodgkin's lymphoma underwent ABMT with BM harvested in February 1990. He achieved a granulocyte count > 500 x 10(6)/L on day 21 and a self-supporting platelet count > 20 x 10(9)/L on day 30. After day 29, his hemoglobin level was satisfactory without need of transfusion support. This successful trilineage engraftment with cryopreserved BM that had been stored for 7 years suggests that HSC are able to maintain their capability to reconstitute hematopoiesis for a long time.