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941.
An ameloblastoma of the right side of the mandible was resected in a 32 year old prediabetic female. An iliac crest autograft became infected and a sequestrum was removed seven weeks later. Pathologic examination of this tissue demonstrated a mixed infection, including Acanthamoeba castellanii. This is the first recorded instance of invasion of bone by a free living ameba. 相似文献
942.
A conditioning stimulus to the periventricular gray matter inhibits the response of spinal trigeminal neurons to maxillary nerve stimulation. Sodium valproate and ethosuximide decrease the periventricular inhibition without significantly affecting the response of these neurons to the unconditioned maxillary nerve stimulus. We have now found that carbamazepine and phenytoin decrease the response to the unconditioned maxillary nerve stimulus, and only depress the periventricular inhibition secondarily. These results further support the hypothesis that the ability to depress selectively inhibitory pathways in the CNS is an important characteristic of antiabsence drugs, and that absence seizures may represent paroxysmal discharges in inhibitory pathways. 相似文献
943.
Jose G. de la Campa Julio Guzmn Javier de Abajo Evaristo Riande 《Macromolecular chemistry and physics.》1981,182(11):3163-3168
Copolymers of (ethylene glycol/diethylene glycol) terephthalates were prepared by melt polycondensation. The values of the glass transition temperatures of the copolyesters, determined by dilatometry are in fair agreement with those predicted by the Fox equation. It was also found that the conformational entropy can be used to correlate equilibrium flexibility and glass transition behaviour of the copolyesters. 相似文献
944.
Liliana Basabe Nelson Cabrera Vladimir Yong Javier Menéndez Julio M. Delgado L. Rodríguez 《Current genetics》1996,30(1):89-92
A method to obtain K. marxianus mutants has been developed. Different auxotrophic mutants were isolated by nystatin and snail-enzyme enrichment procedures
using an incubation time of 2 h before adding the antibiotic or the enzyme respectively. All his mutants analyzed by complementation tests turned out to belong to the same complementation group. Some of them were transformed
and complemented by the S. cerevisiae HIS3 gene. These non-reverting his3 mutants contain no heterologous sequence, which is essential to make them acceptable for application in the food industry.
Received: 15 November/21 December 1995 相似文献
945.
Maria L. Somacarrera MD DDS PhD Miguel Lucas MD DDS PhD Julio Acero MD DDS PhD 《Special care in dentistry》1996,16(1):18-21
A heart transplant patient undergoing a combined cyclosporine and prednisone treatment was monitored during the 18 months following transplantation. A complete oral and dental examination was performed in each of the first six months after transplantation, and then in the 9th, 12th, 15th, and 18th months. The data collected included gingival hyperplasia secondary to cyclosporine use, and clinical and periodontal variables. Histological studies were also conducted on gingival tissue samples in months 1, 3, 9, 15, and 18. Cyclosporine treatment was replaced by azathioprine treatment in month 10 because the patient was experiencing nephrotoxicity. Between months 9 and 18, gingival hyperplasia regressed by 26.5% due to a reduction in the fibrous connective tissue mass, fibroblasts, and inflammatory infiltration. The control group included 13 heart transplant patients subject to equivalent conditions except discontinuance of cyclosporine treatment; seven of the patients had developed hyperplasia by month 9. Average hyperplasia in the control group increased by 2% between months 9 and 18; only one patient showed a 6.2% decrease in hyperplasia. This provides further evidence for the causal relationship between cyclosporine therapy and gingival hyperplasia, and suggests that this side-effect is reversible . 相似文献
946.
Mary O. Dereski Michael Chopp Robert A. Knight Laura C. Rodolosi Julio H. Garcia 《Acta neuropathologica》1993,85(3):327-333
Summary Male Fisher rats (n=61) underwent permanent focal cerebral ischemia induced by left middle cerebral artery (MCA) occlusion, in conjunction with ipsilateral common carotid artery ligation. The experiments were terminated at time points ranging from immediately following occlusion to 30 days post MCA occlusion. A coronal histological section, in close proximity to the site of the arterial occlusion, was taken from each brain and divided into six areas encompassing the affected cortex and caudate putamen. Each area was analyzed for ischemic damage according to a grading scale that reflects changes in neuronal morphology. Differential neuronal counts were also made on a 0.5-mm2 field in each of the six areas. The areas closest to the occluded vessel showed accelerated ischemic damage between 8 and 12 h after occlusion, leaving open the possibility that before 8 h, therapeutic intervention may be effective. After 12 h, changes in these areas progressed to complete necrosis and eventual cavitation with a complete loss of neurons after 10 days. The areas more peripheral to the occluded vessel exhibited mild ischemic damage, with an apparent reversal of damage grading at later time points and no loss of neurons. This reversal of ischemic damage in the peripheral areas is suggestive of a histological equivalent of the penumbra.Supported by NIH Grants NS23393 and NS29463 相似文献
947.
Javier Benítez Julio Outeriño M.José Bello Juan Rey 《Cancer Genetics and Cytogenetics》1985,18(4):333-336
We present a case of acute nonlymphocytic leukemia with severe hypodiploidy (38 chromosomes), complex karyotype, and one double minute chromosome. These unusual chromosome findings could be related to the rapid course of the patient's disease. 相似文献
948.
Juan J. Rufilanchas Fernando Villagra Jose M. Maroñas Gabriel Tellez Julio Agosti Alberto Juffe Diego Figuera 《American journal of surgery》1977
A new surgical approach is proposed for patients with coarctation of the aorta associated with severe aortic valvular insufficiency. The valvular lesion should be repaired first and the coarctation corrected during a second operation; both interventions should be done during the same hospital stay. We base our approach on the belief that improved coronary perfusion can be achieved when the aortic insufficiency is corrected first. The disadvantages of the opposite surgical approach, such as anticoagulation problems, renal underperfusion, and hypertensive complications are easily avoided. 相似文献
949.
Mycobacterium chelonei Infection: Successful Treatment Based on a Radiometric Susceptibility Test 总被引:1,自引:1,他引:0
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A patient with Mycobacterium chelonei infection was treated with erythromycin stearate and streptomycin. The choice of antibiotics was based on a rapid radiometric susceptibility test developed in our laboratory. 相似文献
950.
Consecutive series of 50 transvenous and 50 sutureless pacemaker insertions were reviewed and compared with a nonsimultaneous series of 50 patients who received sutured epicardial pacemakers. It is concluded that: (1) the sutureless electrode has a lower initial stimulation threshold than the transvenous type; (2) complications from sutureless electrodes are greater than with transvenous electrodes and similar to the incidence with sutured epicardial pacemakers; (3) initial pacing is more satisfactory with the sutureless electrode compared with the transvenous model; and (4) late electrode failure due to threshold rise is greater with the sutureless electrode than with the transvenous or sutured epicardial type. 相似文献