Browsing by Title Facultad de Ciencias
Now showing items 4539-4558 of 8178
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(Nature Publishing Group, 2018)Nanoparticles are ubiquitous in nature and are increasingly important for technology. They are subject to bombardment by ionizing radiation in a diverse range of environments. In particular, nanodiamonds represent a variety ...
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(Editorial Codelia, 1986)Self Consistent Reaction Field (SCRF) ealculations, including dielectric solvent effects, have been performed to analyze the relative stabilities of the different chernical species found in substitution reactions involving ...
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(1991)Electrostatic solvation energies of singly charged monoatomic ions may be predicted from the knowledge of an electrostatic potential buildup from a physically meaningful ionic radius. Since the asymptotic behavior of the ...
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(1994)A Kohn-Sham (KS) like formalism for the calculation of solvation energies of singly charged ions is presented. The approximate theory is based on a simple model that represents embedding an atomic ion into a polarizable ...
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(1992)The ion-selective properties of the cyclic depsipeptide molecule valinomycin in methanol are studied by free energy perturbation molecular dynamics simulations. The dependence of the alkali cation selectivity on the dipole ...
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(1993)Electronic absorption spectra for complexes CpFe(dppe)X [with X = Cl, I and CN; dppe = (Ph)2PCH2CH2P(Ph)2; Cp = η5-C5H5] and the cationic derivative [CpFe(dppe)NCCH3]PF6 in different solvents have been measured. The lower ...
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(1994)A method which allows the evaluation of phenomenological ion exchange constants Kex is proposed and tested in a cationic polyelectrolyte system. Results for nitrate/chloride exchange are nearly constant over the entire ...
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(Sociedad Química Chilena, 2003-10-02)The structure of the 1: 2 adduct of hexamethylenetetramine and thiaurea was reanalyzed reinterpreting X-ray diffractian data and providing additianal IR and NMRspectrascapic features. The praduct is thus described as ...
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(Elsevier, 2018-06)Emerging and re-emerging epidemic diseases pose an ongoing threat to global health. Currently, Enterobactin and Enterobactin derivatives have gained interest, owing to their potential application in the pharmaceutical ...
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(2001)Monomelittoside, melittoside, 8-acetyl-harpagide, har-pagide, ajugol, 5-desoxy-harpagide, 5-desoxy-8-acetyl-harpagide and catalpol were isolated from the aerial parts of S. grandidentata. © 2001, Verlag der Zeitschrift für ...
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(2006)Neurons, as non-dividing cells, encounter a myriad of stressful conditions throughout their lifespan. In particular, there is increasing evidence that iron progressively accumulates in the brain with age and that ...
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(Public Library Science, 2015)Neuronal death in Parkinson's disease (PD) is often preceded by axodendritic tree retraction and loss of neuronal functionality. The presence of non-functional but live neurons opens therapeutic possibilities to recover ...
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(2005)Background: Iron is necessary for neuronal function but in excess generates neurodegeneration. Although most of the components of the iron homeostasis machinery have been described in neurons, little is known about the ...
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(BIOMED CENTRAL LTD, 2005-01-24)Background: Iron is necessary for neuronal function but in excess generates neurodegeneration. Although most of the components of the iron homeostasis machinery have been described in neurons, little is known about the ...
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(Springer, 2011)Studies in post-mortem tissues of patients with Parkinson’s disease (PD) and in mice treated with 6-hydroxydopamine have shown a decrease in the length of axon and dendrites of striatal neurons. However, the etiology of ...
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(2010)00168.2009.—Intestinal iron absorption comprises the coordinated activity of the influx transporter divalent metal transporter 1 (DMT1) and the efflux transporter ferroportin (FPN). In this work, we studied the movement ...
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(2012)Iron is an essential element for life on earth, participating in a plethora of cellular processes where one-electron transfer reactions are required. Its essentiality, coupled to its scarcity in aqueous oxidative environments, ...
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(1994)Infrared spectra in the region 4000-70 cm-1 are recorded for [1,2-bis(diphenylphosphino)methane](triphenylphosphite)bromo (cis,cis- and trans-dicarbonyl)manganese, and η5-cyclopentadienyl-[1,2-bis(diphenylphosphino)ethan ...
