476 resultados para PBI-1402


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Une des complications importantes d’un traitement intensif de chimio/radio-thérapie est l’aplasie de la moelle osseuse qui peut persister longtemps même après une greffe de cellules souches. Le PBI-1402 est un petit lipide qui a été associé à la diminution de l’apoptose des neutrophiles induite par des agents cytotoxiques. Nos travaux ont démontré que la culture in vitro de progéniteurs hématopoiétiques humains en présence de PBI-1402 induit une augmentation significative du nombre de progéniteurs érythroides (PEryth) (p<0,05). En évaluant la sensibilité des PEryth à l’érythropoietine (Epo), nous avons démontré que le PBI-1402 n’a pas d’effet sensibilisateur et que les cellules répondent de façon similaire aux cellules contrôles. De plus, la combinaison de l’Epo et du « stem cell factor » avec le PBI-1402 permet de prolonger et d’augmenter l’activation d’ERK1/2 (p<0,05), un important signal mitogène. Cet effet est associé à une inhibition de l’activation de la phosphatase MKP-1 dans les cellules exposées au PBI-1402. Nous démontrons aussi la capacité du PBI-1402 à amplifier la prolifération des PEryth et sa capacité à réduire la durée et l’intensité de l’anémie dans un modèle in vivo murin. Des souris ayant reçu une dose létale d’irradiation et subi une transplantation syngénique de moelle osseuse, ont été traitées oralement avec le PBI-1402 pendant 14 jours. Ces souris démontrent une réduction significative de l’anémie post-transplantation versus les souris contrôle (p<0,05). De plus, la moelle osseuse des souris traitées au PBI-1402 présente un nombre de BFU-E et CFU-E plus élevé comparativement au contrôle. Ces résultats démontrent donc le potentiel du PBI-1402 à réduire l’anémie post-transplantation et accélérer la reconstitution érythroïde.

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首次用聚苯并咪唑(PBI)作固体电解质,制成控制电位电解法半固态和全固态氧传感器发现该类传感器具有响应快、稳定性好、低的底电流和噪声、低的温度系数等优点。

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The oxidation of trimethoxymethane (TMM) (trimethyl orthoformate) in a direct oxidation PBI fuel cell was examined by on-line mass spectroscopy and on-line FTIR spectroscopy. The results show that TMM was almost completely hydrolyzed in a direct oxidation fuel cell which employs an acid doped polymer electrolyte to form a mixture of methylformate, methanol and formic acid. It also found that TMM was hydrolyzed in the presence of water at 120°C even without acidic catalyst. The anode performance improves in the sequence of methanol, TMM, formic acid/methanol, and methylformate solutions. Since formic acid is electrochemically more active than methanol, these results suggest that formic acid is probably a key factor for the improvement of the anode performance by using TMM instead of methanol under these conditions. © 1998 Elsevier Science Ltd. All rights reserved.

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Acquis le 3 mars 1823 de M. Renard de la Savonnerie, pour le prix de 10 francs; cf. B.n.F., département des Manuscrits, Archives Modernes 492ter, registre des acquisitions du département des Manuscrits 1821-1830, f. 100 "Dépenses de l'église de Beauvais en 1402, in fol. en latin"

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Lead iodide thin films were fabricated using the spray pyrolysis technique. Milli-Q water and N.N-dimethylformamide were used as solvents under varying deposition conditions. Films as thick as 60 mu m were obtained. The optical and structural properties of the samples were investigated using Photoluminescence, Raman scattering, X-ray diffraction, and Scanning electron microscopy. In addition, the study included also the electronic properties which were investigated by measuring the dark conductivity as a function of temperature. The deposition technique seems to be promising for the development of thick films to be used in medical imaging.

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The stability of encapsulated planar-structured CH3NH3PbI3 (MAPbI3) perovskite solar cells (PSCs) was investigated under various simulated environmental conditions. The tests were performed under approximately one sun (100 mW cm-2) illumination, varying temperature (up to 85 °C cell temperature) and humidity (up to 80%). The application of advanced sealing techniques improved the device stability, but all devices showed significant degradation after prolonged aging at high temperature and humidity. The degradation mechanism was studied by post-mortem analysis of the disassembled cells using SEM and XRD. This revealed that the degradation was mainly due to the decomposition of MAPbI3, as a result of reaction with H2O, and the subsequent reaction of hydroiodic acid, formed during MAPbI3 decomposition, with the silver back contact electrode layer.

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Doctorado en Historia. Programa de España y Canarias en la Historia Moderna y Contemporánea

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1. Tarih-i Al-i Osman bin Ertuğrul (dates of Ottoman Sultans) (f. 1r) -- 2. Suret-i arzname (ff. 1v--2v) -- 3. Arabic poem, awāʼil Muḥarram 804 [August 11-20, 1401] (copied by Ḥājjī Aḥmad ibn ... al-B.f.l.ghānī) (ff. 3r-11r) -- 4. Taʻrīfāt ʻilm usūl fiqh, Shawwāl 804 [May 1402] (ff. 11v-16v) -- 5. Arabic glossary (explanations in Arabic and Persian), 804 [1402] (copied by Idrīs b. Ḥasan b. Bayram) (ff. 17r-52r) -- 6. Sharḥ al-Farāʼiḍ al-Sirājīyah / ʻAbd al-Karīm b. Muḥammad b. al-Ḥasan al-Hamadānī al-Tabrīzī, awāsiṭ Dhī al-Ḥijja 804 [July 1402] (copied by Idrīs b. Ḥasan b. Bayram) (ff. 52v-94r) -- 7. Lughat-i ḥurūf (ff. 94v-95r) -- 8. Mufradāt-i Pārsī (A list of Persian verbs) (ff. 95v-97v).