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排序方式: 共有103条查询结果,搜索用时 218 毫秒
1.
Y Moricart R Deloince P M Niaussat J Drouet R Bagnis C Faucomprez Y Neveux 《Bulletin de la Societe de pathologie exotique (1990)》1975,68(2):221-228
The use of histo-enzymological techniques for visualizing the cholinesterasic spots on the motory plate is turned to account by the authors to point out the inhibition of the cholinesterasic processes, by some fractions of the ciguatoxins at the level of the neuro-mucular synapsis. The results obtained confirm, on one hand, the efficiency of the method to test the anti-cholinesterasic activity of some fractions of the ciguateric extracts, and, on the other hand, enable the establishment of the fact that even clinically non toxic individuals from fishspecies, dwelling in tropical coral biotops, can provoke a slightly marked but real inhibition of the cholinesterases, provided the contact between the fish extract and the neuro-motory plate is long enough in time. This observation reinforces the thesis of the ecological origin of the toxins along the alimentary chain of the reef biocoenosis. 相似文献
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Isnard Bagnis C Tezenas du Montcel S Beaufils H Jouanneau C Jaudon MC Maksud P Mallet A LeHoang P Deray G 《Journal of the American Society of Nephrology : JASN》2002,13(12):2962-2968
Cyclosporine (CsA), a widely used immunosuppressive drug, is an effective treatment of sight-threatening posterior idiopathic uveitis. CsA's main side effect is nephrotoxicity. The aim of this single-center prospective cohort study (conducted in a tertiary care teaching hospital in Paris, France) was to assess the long-term renal tolerance of a low-dose CsA treatment in patients with previously healthy kidneys on clinical, biologic, and pathologic criteria. Forty-one patients treated with 4.3 +/- 1.6 mg/kg body wt per day CsA for 44.9 +/- 3.6 mo were included. Mean follow-up was 55.4 +/- 0.2 mo. BP, CsA trough level, and renal function were prospectively monitored together with blood urea, creatinine clearance, GFR, and effective renal plasma flow. Eleven patients underwent serial kidney biopsies before and after 2 yr of a 4 +/- 0.9 mg/kg daily CsA treatment. Sustained low-dose CsA treatment induced a significant increase in plasma creatinine (P < 0.0001), a significant decrease in creatinine clearance (P < 0.0001), and isotopic GFR (P < 0.0001) over time. The highest dose induced more severe alterations in any of the renal parameters than the lowest dose. Prevalence of hypertension was particularly high. Histopathologic data showed significant interstitial fibrosis (P < 0.003) and tubular atrophy (P < 0.003) after 2 yr. Low-dose long-term CsA treatment induces significant renal impairment and a high incidence of hypertension. Our study suggests that lowering daily dosage may prevent CsA-induced nephrotoxicity if a daily dose of < or =3 mg/kg is used. Whether once established it is reversible is still prospective, although the occurrence of interstitial fibrosis in the kidney would argue against reversibility. 相似文献
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Bastide C Bagnis C Mannoni P Hassoun J Bladou F 《Prostate cancer and prostatic diseases》2002,5(4):311-315
Prostate cancer is the second cause of cancer mortality in men in Western countries. To study new therapeutic approaches such as gene therapy, animal models of human prostate cancer with metastatic behavior are mandatory. We used the Nod Scid mouse strain to develop an orthotopic animal model. Two androgen-independent cell lines (PC-3 and DU 145) were used. Local tumor growth and metastases were analyzed. The tumor take rates were close to those reported in the literature. However, a high frequency of various metastatic sites has been observed (liver, lung, spleen, adrenal, kidney, lymph node, and diaphragm). It can be concluded that the Nod Scid mouse is a relevant preclinical animal model to study human prostate cancer. Metastatic sites seem more numerous in comparison to other orthotopic mice models described. 相似文献
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Deray G Heurtier A Grimaldi A Launay Vacher V Isnard Bagnis C 《American journal of nephrology》2004,24(5):522-526
World Health Organization statistics identify 150 million people with diabetes mellitus worldwide and suggest that this figure may double by 2025. In countries with a western lifestyle, the number of patients admitted for renal replacement therapy with diabetes as a co-morbid condition has increased significantly up to three to four times in a period of 10 years. Diabetes and renal failure are thus tightly linked diseases, and so is anemia. However, whether anemia may be worsened and/or directly, at least in part, caused by diabetes is not clearly elucidated yet. In this article, we review the prevalence, pathophysiology and consequences of anemia in diabetic patients. 相似文献
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Picking Some News about the Retroviral Vector World from the 9th Symposium of the European Society of Gene Therapy 下载免费PDF全文
Bagnis C 《Journal of biomedicine & biotechnology》2002,2(1):4-6
The 9th symposium of the European Society of Gene Therapy (ESGT) organized by Murat Tuncer (President of the Meeting), Bernd Gansbacher (President of the ESGT), and Meral Ozguc (Secretary of the Meeting) took place in Antalya, South Turkey, on 2–4 November 2001. Although the international political context made difficult the coming of some researchers, this symposium has drawn an interesting picture of the works in progress in Europe and in the Mediterranean area. 相似文献
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Szynal M Cleuter Y Beskorwayne T Bagnis C Van Lint C Kerkhofs P Burny A Martiat P Griebel P Van den Broeke A 《Oncogene》2003,22(29):4531-4542
Transactivating proteins associated with complex onco-retroviruses including human T-cell leukemia virus-1 (HTLV-1) and bovine leukemia virus (BLV) mediate transformation using poorly understood mechanisms. To gain insight into the processes that govern tumor onset and progression, we have examined the impact of BLV-Tax expression on ovine B-cells, the targets of BLV in experimentally infected sheep, using B-cell clones that are dependent on CD154 and gammac-common cytokines. Tax was capable of mediating progression of B-cells from cytokine dependence to cytokine independence, indicating that the transactivator can over-ride signaling pathways typically controlled by cytokine receptor activation in B-cells. When examined in the presence of both CD154 and interleukin-4, Tax had a clear supportive role on B-cell growth, with an impact on B-cell proliferation, cell cycle phase distribution, and survival. Apoptotic B-cell death mediated by growth factor withdrawal, physical insult, and NF-kappaB inhibition was dramatically reduced in the presence of Tax. Furthermore, the expression of Tax was associated with higher Bcl-2 protein levels, providing rationale for the rescue signals mediated by the transactivator. Finally, Tax expression in B-cells led to a dramatic increase of nuclear RelB/p50 and p50/p50 NF-kappaB dimers, indicating that cellular signaling through NF-kappaB is a major contributory mechanism in the disruption of B-cell homeostasis. Although Tax is involved in aspects of pathogenesis that are unique to complex retroviruses, the viral strategies associated with this transactivating oncoprotein may have wide-ranging effects that are relevant to other B-cell malignancies. 相似文献
9.
Vitale C Bagnis C Marangella M Belloni G Lupo M Spina G Bondonio P Ramello A 《Journal of nephrology》2003,16(4):572-579
BACKGROUND: We implemented a program for continuous renal replacement therapies (CRRT) in intensive care units (ICU) based on the cooperative work of dialysis and ICU personnel. Our aim was to report the main details of this program and compare its cost with that of intermittent hemodiafiltration (IHDF). METHODS: The study referred to 181 ICU patients with renal failure. We considered the costs of both technical devices and assisting personnel. CRRT was performed as continuous veno-venous hemodiafiltration (CVVHDF) (24 hr daily); dialysis and ICU nurses shared surveillance. Only dialysis nurses performed IHDF (as acetate-free biofiltration, 4 hr daily) in the ICU. RESULTS: The daily cost of CRRT was Euro 276.70; of which 79% was for devices and 21% was for human resources. Nurse surveillance required 141 min per day, ICU nurses supplied 55% (77 min) and dialysis nurses 45% (64 min). On average, CRRT surveillance required less than 1 min/nurse/hr for both dialysis and ICU nurses. The daily cost of 4-hr IHDF sessions of was Euro 247.83, of which 44% was for technical devices and 56% was for human resources. CONCLUSIONS: The cooperation between dialysis and ICUs improved the use of human resources and allowed us to supply CRRT to all critically ill patients with acute renal failure. The expenditure for CRRT was 12% higher than that for IHDF, due to the cost of technical devices. 相似文献
10.
Bastide C Maroc N Bladou F Hassoun J Maitland N Mannoni P Bagnis C 《Prostate cancer and prostatic diseases》2003,6(3):228-234
In a preclinical model for prostate cancer gene therapy, we have tested lentiviral vectors as a practical possibility for the transfer and long-term expression of the EGFP gene both in vitro and in vivo. The human prostate cancer cell lines DU145 and PC3 were transduced using experimental conditions which permitted analysis of the expression from a single proviral vector per cell. The transduced cells stably expressed the EGFP transgene for 4 months. After injection of the transduced cell populations into Nod-SCID mice a decrease in EGFP was only observed in a minority of cases, while the majority of tumors maintained transgene expression at in vitro levels. In vivo injection of viral vector preparations directly into pre-established subcutaneous or orthotopic tumor masses, obtained by implantation of untransduced PC3 and DU145 cells led to a high transduction efficiency. While the efficiency of direct intratumoral transduction was proportional to the dose of virus injected, the results indicated some technical limitations inherent in these approaches to prostate cancer gene therapy. 相似文献