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Hanifa Daoui Yasmine Bouhamidi Ahmed Boucherit Mohamed Zouikri 《International Journal of Polymer Analysis and Characterization》2018,23(5):463-473
The fundamental understanding of the behavior of a solid is intimately related to the understanding of the interactions on the surface of the latter, a major challenge in particular if the material is natural and ecological. The infinite dilution-inverse gas chromatography was used to evaluate the surface thermodynamic properties of several phases (grafted and/or coated) diatomite. A series of non- or polar-solute probes were injected at temperatures of 45?°C and 90?°C. The dispersive surface free energies values of the supports decrease with increasing temperature and their active surface is amphoteric with predominantly acidic character. 相似文献
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To get hyperinvariant subspaces, we establish a relation between the growth of the resolvent and the geometry of the spectrum. Our approach is based on a resolution of the generalized Dirichlet problem.
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Dickie DA Chan AY Jalali H Jenkins HA Yu HZ Clyburne JA 《Chemical communications (Cambridge, England)》2004,(21):2432-2433
The m-terphenyl 4-mercaptomethyl-2,6-diphenylbenzoic acid (3), was prepared and shown to form omega-carboxyl terminated self-assembled monolayers (SAMs) on gold with high surface pKa(10.1 +/- 0.2) and low density favourable for the binding of biological macromolecules. 相似文献
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We consider limiting average Markov decision processes (MDP) with finite state and action spaces. We propose some algorithms to determine optimal strategies for deterministic and general MDPs. These algorithms are based on graph theory and the construction of levels in some aggregated MDP. 相似文献
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Rimadani Pratiwi Ratu Hanifa Fayza Dipadharma Ishmat Jati Prayugo Olivia Angelina Layandro 《Molecules (Basel, Switzerland)》2021,26(21)
Herbal medicine has become popular in recent years as an alternative medicine. The problem arises when herbal medicines contain an undeclared synthetic drug that is illegally added, since it is a natural product that does not contain any chemical drugs due to the potential cause of harmful effects. Supervision of herbal medicines is important to ensure that these herbal medicines are still safe to use. Thus, developing a reliable analytical technique for the determination of adulterated drugs in herbal medicine is gaining interest. This review aims to provide a recent analytical method that has been used within the past 5 years (2016–2021) for the determination of chemical adulterants in herbal medicine. 相似文献
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A. Daoui 《Rendiconti del Circolo Matematico di Palermo》2000,49(2):353-362
Résumé L’insiemeP degli elementi idempotenti di un’algebra di BanachA é in generale non connesso. J. Zemanek [7] e B. Aupetit [1] hanno dimostrato che le componenti connesse di tale insieme sono
connesse per archi. Inoltre J. Esterle [4] ha dimostrato che due elementi diP appartenti alla stessa componente connessa possono essere collegati attraverso un cammino polinomiale. In questo lavoro si
studia il minimo grado di tali polinomi seA è un’algebra di Banach di dimensione finita oppure seA è l’algebra degli operatori limitati su uno spazio di Banach. 相似文献
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We extend the decomposition approaches for flow lines with unreliable machines and limited buffer capacity as proposed by Gershwin and refined by Dallery, David, and Xie and by Burman by incorporating a new building block in the decomposition. This new building block is a three-machine, one buffer system which models a merging flow of material. While previous decomposition approaches led to a decomposition of the original network into virtual two-machine lines, we now use both virtual two- and three-machine lines. This requires a new set of decomposition equations for the virtual machines of the two-machine lines that surround the new building block modelling the merge. We present these equations, show how to solve them in an algorithm and present numerical results for non-cyclic networks in order to determine production rate and inventory level estimates. 相似文献
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