Kekatolikan Redup Karena Sekularisme? : Argumen Apologetik Jean-Luc Marion

This article presents Marion’s apologetic arguments about the maturity of Catholicity in facing secularism. He believes that secularism, which impacts moral decadence and the hegemony of secular political power, does not extinguish the spirit of Catholicity but becomes a Catholic moment—a chance for her to bear witness to the radicality of love. Authors use the qualitative research method, by making comparison between the theological results-study of Marion and some other theologians’ study and research (Balthasar, Kevin Hart, and Peter-Ben Smit), after having critically read their theological arguments. The results can be put forward in the following dialectical points of theological arguments. The Catholic Church has a matured experience in living a community of love based on the generous love of the Father. The Church demonstrates its responsibility in the world while contemplating the perfect City of God. The Church is not anti-political but simultaneously does not adhere to the hegemony of power. Throughout history, it has struggled to make a clear separation between religion and the state. The Church embraces the world with its two arms, namely, the Word and the Eucharist.This article presents Marion’s apologetic arguments about the maturity of Catholicity in facing secularism. He believes that secularism, which impacts moral decadence and the hegemony of secular political power, does not extinguish the spirit of Catholicity but becomes a Catholic moment—a chance for her to bear witness to the radicality of love. Authors use the qualitative research method, by making comparison between the theological results-study of Marion and some other theologians’ study and research (Balthasar, Kevin Hart, and Peter-Ben Smit), after having critically read their theological arguments. The results can be put forward in the following dialectical points of theological arguments. The Catholic Church has a matured experience in living a community of love based on the generous love of the Father. The Church demonstrates its responsibility in the world while contemplating the perfect City of God. The Church is not anti-political but simultaneously does not adhere to the hegemony of power. Throughout history, it has struggled to make a clear separation between religion and the state. The Church embraces the world with its two arms, namely, the Word and the Eucharist

Adsorption of hydroxamate siderophores and EDTA on goethite in the presence of the surfactant sodium dodecyl sulfate

Siderophore-promoted iron acquisition by microorganisms usually occurs in the presence of other organic molecules, including biosurfactants. We have investigated the influence of the anionic surfactant sodium dodecyl sulfate (SDS) on the adsorption of the siderophores DFOB (cationic) and DFOD (neutral) and the ligand EDTA (anionic) onto goethite (α-FeOOH) at pH 6. We also studied the adsorption of the corresponding 1:1 Fe(III)-ligand complexes, which are products of the dissolution process. Adsorption of the two free siderophores increased in a similar fashion with increasing SDS concentration, despite their difference in molecule charge. In contrast, SDS had little effect on the adsorption of EDTA. Adsorption of the Fe-DFOB and Fe-DFOD complexes also increased with increasing SDS concentrations, while adsorption of Fe-EDTA decreased. Our results suggest that hydrophobic interactions between adsorbed surfactants and siderophores are more important than electrostatic interactions. However, for strongly hydrophilic molecules, such as EDTA and its iron complex, the influence of SDS on their adsorption seems to depend on their tendency to form inner-sphere or outer-sphere surface complexes. Our results demonstrate that surfactants have a strong influence on the adsorption of siderophores to Fe oxides, which has important implications for siderophore-promoted dissolution of iron oxides and biological iron acquisition

Structures of (5′S)-8,5′-Cyclo-2′-deoxyguanosine Mismatched with dA or dT

pubs.acs.org/cr

New Hybrid Properties of TiO2 Nanoparticles Surface Modified With Catecholate Type Ligands

Surface modification of nanocrystalline TiO2 particles (45 Å) with bidentate benzene derivatives (catechol, pyrogallol, and gallic acid) was found to alter optical properties of nanoparticles. The formation of the inner-sphere charge–transfer complexes results in a red shift of the semiconductor absorption compared to unmodified nanocrystallites. The binding structures were investigated by using FTIR spectroscopy. The investigated ligands have the optimal geometry for chelating surface Ti atoms, resulting in ring coordination complexes (catecholate type of binuclear bidentate binding–bridging) thus restoring in six-coordinated octahedral geometry of surface Ti atoms. From the Benesi–Hildebrand plot, the stability constants at pH 2 of the order 103 M−1 have been determined

Recent approaches in designing bioadhesive materials inspired by mussel adhesive protein

Marine mussels secret protein-based adhesives, which enable them to anchor to various surfaces in a saline, intertidal zone. Mussel foot proteins (Mfps) contain a large abundance of a unique, catecholic amino acid, Dopa, in their protein sequences. Catechol offers robust and durable adhe-sion to various substrate surfaces and contributes to the curing of the adhesive plaques. In this article, we review the unique features and the key functionalities of Mfps, catechol chemistry, and strategies for preparing catechol-functionalized poly- mers. Specifically, we reviewed recent findings on the contributions of various features of Mfps on interfacial binding, which include coacervate formation, surface drying properties, control of the oxidation state of catechol, among other features. We also summarized recent developments in designing advanced biomimetic materials including coacervate-forming adhesives, mechanically improved nano- and micro-composite adhesive hydrogels, as well as smart and self-healing materials. Finally, we review the applications of catechol-functionalized materials for the use as biomedical adhesives, therapeutic applications, and antifouling coatings