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11.
Gaetana Restuccia 《Rendiconti del Circolo Matematico di Palermo》1983,32(3):289-306
Si considera il seguente problema posto da Grothendieck (E.G.A.): SeA è un anello eccellente edm un ideale diA, (A, m) ^=m-adico completamento diA è eccellente? Si mostra che la risposta è positiva nei seguenti casi:
- A=algebra di tipo finito su un DVR completo di caratteristicap>0;
- A=algebra di tipo finito su un DVRC contenente un corpok di caratteristicap>0 e finito suk [C p ] oppure tale che:
- per ogni sottocampok′ dik contenentek p tale che [k:k′]<∞, il modulo universale finito dei differenzialiD k′ (C) esiste;
- il corpo residuoK diC soddisfa rank KK ? K/k <∞
- C ha una Der-base.
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Dr. Nicolas Delaporte Dr. Abdelbast Guerfi Dr. Hendrix Demers Dr. Henning Lorrmann Dr. Andrea Paolella Dr. Karim Zaghib 《ChemistryOpen》2019,8(2):192-195
A nanolayer of reactive propyl acrylate silane groups was deposited on a lithium surface by using a simple dipping method. The polymerization of cross-linkable silane groups with a layer of ally-ether-ramified polyethylene oxide was induced by UV light. SEM analysis revealed a good dispersion of silane groups grafted on the lithium surface and a layer of polymer of about 4 μm was obtained after casting and reticulation. The electrochemical performance for the unmodified and modified lithium electrodes were compared in symmetrical Li/LLZO/Li cells. Stable plating/stripping and low interfacial resistance were obtained when the modified lithium was utilized, indicating that the combination of silane and polymer deposition is promising to increase Li-metal/garnet contact. 相似文献
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In this paper we introduce the concept of s-sequences in order to study the symmetric algebra of a module. It is explained how s-sequences are related to d-sequences. The theory is applied to study the symmetric algebra of generic modules. We also compute the Gr?bner basis of
the defining ideals of these symmetric algebras.
Received: 12 September 2000 / Accepted: 26 January 2001 相似文献
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Stefania Martucciello Gaetana Paolella Antonio Massimiliano Romanelli Silvia Sposito Lucia Meola Antonietta Cerulli Milena Masullo Sonia Piacente Ivana Caputo 《Molecules (Basel, Switzerland)》2022,27(15)
Pergularia tomentosa L., a milkweed tropical plant belonging to the family Asclepiadaceae, is a rich source of unusual cardiac glycosides, characterised by transfused A/B rings and a sugar moiety linked by a double link, generating a dioxanoid structure. In the present report, five cardenolides isolated from the aerial parts of the plant (calactin, calotropin, 12β-hydroxycalactin, 12β,6′-dihydroxycalotropin, and 16α-hydroxycalotropin) were investigated for their biological effects on a human hepatocarcinoma cell line. Cell viability was monitored by an MTT assay. The occurrence of apoptosis was evaluated by detecting caspase-3 activation and chromatin fragmentation. The ability of these compounds to induce autophagy was analysed by monitoring two markers of the autophagic process, LC3 and p62. Our results indicated that all cardenolides had cytotoxic effects, with IC50 ranging from 0.127 to 6.285 μM. All compounds were able to induce apoptosis and autophagy, calactin being the most active one. Some of them also caused a reduction in cell migration and a partial block of the cell cycle into the S-phase. The present study suggests that selected cardenolides from aerial parts of P. tomentosa, particularly calactin, possess potentially desirable properties for further investigation as anticancer agents. 相似文献
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Leopoldo Sitia Katia Paolella Michela Romano Martina Bruna Violatto Raffaele Ferrari Stefano Fumagalli Laura Colombo Ezia Bello Maria Grazia De Simoni Maurizio D’Incalci Massimo Morbidelli Eugenio Erba Mario Salmona Davide Moscatelli Paolo Bigini 《Journal of nanoparticle research》2014,16(7):1-16
Innovative strategies that utilize nanoparticles (NPs) for a better delivery of drugs and to improve their therapeutic efficacy have been widely studied in many clinical fields, including oncology. To develop safe and reliable devices able to reach their therapeutic target, a hierarchical characterization of NP interactions with biological fluids, cells, and whole organisms is fundamental. Unfortunately, this aspect is often neglected and the development of standardized characterization methods would be of fundamental help to better elucidate the potentials of nanomaterials, even before the loading of the drugs. Here, we propose a multimodal in vitro/in vivo/ex vivo platform aimed at evaluating these interactions for the selection of the most promising NPs among a wide series of materials. To set the system, we used non-degradable fluorescent poly(methyl-methacrylate) NPs of different sizes (50, 100, and 200 nm) and surface charges (positive and negative). First we studied NP stability in biological fluids. Then, we evaluated NP interaction with two cell lines of triple-negative breast cancer (TNBC), 4T1, and MDA-MB231.1833, respectively. We found that NPs internalize in TNBC cells depending on their physico-chemical properties without toxic effects. Finally, we studied NP biodistribution in terms of tissue migration and progressive clearance in breast-cancer bearing mice. The use of highly stable poly(methyl-methacrylate) NPs enabled us to track them for a long time in cells and animals. The application of this platform to other nanomaterials could provide innovative suggestions for the development of a systematic method of characterization to select the most reliable nanodrug candidates for biomedical applications. 相似文献