Two-, three-, and four-component magnetic multilayer onion nanoparticles based on iron oxides and manganese oxides

Magnetic multilayered, onion-like, heterostructured nanoparticles are interesting model systems for studying magnetic exchange coupling phenomena. In this work, we synthesized heterostructured magnetic nanoparticles composed of two, three, or four components using iron oxide seeds for the subsequent deposition of manganese oxide. The MnO layer was allowed either to passivate fully in air to form an outer layer of Mn3O4 or to oxidize partially to form MnO|Mn3O4 double layers. Through control of the degree of passivation of the seeds, particles with up to four different magnetic layers can be obtained (i.e., FeO|Fe3O4|MnO|Mn3O4). Magnetic characterization of the samples confirmed the presence of the different magnetic layers

Suhopolje – Kliškovac 2008

Institut za arheologiju proveo je četvrtu kampanju sustavnih arheoloških istraživanja na lokalitetu Suhopolje – Kliškovac, u trajanju od mjesec dana. Istraživanje je provedeno u okviru projekta Ministarstva znanosti, obrazovanja i športa ‘’Srednjovjekovno arheološko nasljeđe Hrvatske (5.-17. st.)’’, kojega je voditelj prof. dr. sc. Željko Tomičić. Potporu istraživanju pružili su Ministarstvo kulture Republike Hrvatske i Poglavarstvo općine Suhopolje. Ovogodišnja istraživanja obuhvatila su površinu od 117 m˛, u kvadrantima M 3, L 4, M 4, L 5 i M 5. Definirana je pravokutna prostorija čiji se zapadni i istočni zidovi pružaju u pravcu sjever – jug. Istražena su 34 groba. U južnoj prostoriji istraženi su najstariji grobovi, tj. oni koji su ukopani u zdravicu koja se nalazi ispod sloja SJ 003 i definirana je kao SJ 335. U kvadrantima L/M 5 istražen je poluukopan objekt (zemunica ?) koji je datiran C14 analizom ugljena, od druge polovice 13. do druge polovice 14. st.The Institute of Archaeolog y conducted the fourth campaign of systematic archaeological excavations at the Suhopolje-Kliškovac site, lasting one month. The excavations were conducted within the framework of the project of the Ministry of Science, Education and Sport called “Croatia’s Medieval Archaeological Heritage (5th – 17th centuries)”, led by Professor Željko Tomičić Ph.D., and with the support of the Ministry of Culture of the Republic of Croatia and the Municipal Government Suhopolje. This year’s excavations encompassed a surface of 117 m² in quadrants M 3, L 4, M 4, L 5 and M 5, of which quadrants L/M 4 were examined in 2006 and 2007, and quadrants L/M 5 and M 3 were opened this year. The reason for opening a new surface was to single out the ground plan of the medieval building, southern, eastern and western walls of which were identified during the excavations of 2006 and 2007. A rectangular ground-plan was defined, its western and eastern walls extending in the north-south direction, cut by a railway track. The width of the room (east-west) without walls is 3.5 m, and with walls 5.51 m. The length of the room (north-south) without walls is 3.09 m, and with walls 5.2 m. This year, 34 graves were excavated. First the graves whose fill was defined at the end of the excavations of 2007 were excavated in □ M 4, situated east of the building. In □ L 4, graves were excavated lying within the northern space, and graves in the space to its south. In the southern space, the oldest graves were excavated, i.e. those sunk into sterile soil, which lies under layer SU 003 and was defined as SU 335. It is exceedingly packed, hard and wet sandy earth with a high quantity of oxides. All excavated graves are oriented west-east with heads westwards. Anthropological remains were sent to the Archaeolog y Department of the Croatian Academy of Science and Arts (HAZU) for a detailed anthropological analysis, which yielded precise details of the sex and age of the deceased, and of any pathological changes in the bones of the deceased. Graves 83, 54, 55, 56, 57, 58, 59, 84, 85 and 93 are arranged in a single row east of the facility, and at present it is assumed that they are coterminous with the facility. As for the other graves, it is necessary to conduct a parallel analysis of the burials and conduct a C14 analysis. The graves that were crosscut by walls or that lay at the bottom of the wall’s imprint in the soil are older than the facility. In quadrants L/M 5, north of the impression left by the north wall in the ground, under a layer of recent humus, there is a layer designated as SU 138 in which, apart from the impression of the north wall SU 196, several closed complexes were sunken as well. Some were made during demolition of the structure, like the impression of the wall, while others were probably geologically filled. Under layer SU 138 in □ M/L 5 there is a layer, SU 002, in which the pit-dwelling SU 248 was sunken with a serious of smaller pillars surrounding it. The pit-dwelling is rather shallow (or it has been preserved by ploughing), with an irregular, triangularly shaped ground-plan. Along the southern margin there is a structure – fireplace SU 252. In the fill there are fragments of brick and soot particles, as well as tiny fragments of medieval pottery. This facility confirms the assumption that there was a settlement here; (it can be dated from the middle of the thirteenth to fourteenth centuries according to C14 analysis, conducted in the BETA laboratory, Florida)

4p states and X-Ray Spectroscopy

The 4p states in transition metals and their compounds usually play minor roles on their physical quantities. Recent development of resonant x-ray scattering (RXS) at the K-edge of transition metals, however, casts light on the 4p states, because the signals on orbital and magnetic superlattice spots are brought about by the modulation in the 4p states. The 4p states are extending in solids and thereby sensitive to electronic states at neighboring sites. This characteristic determines the mechanism of RXS that the intensity on the orbital superlattice spots are mainly generated by the lattice distortion and those on magnetic superlattice spots by the coupling of the 4p states with the orbital polarization in the 3d states at neighboring sites. Taking up typical examples for orbital and magnetic RXS, we demonstrate these mechanisms on the basis of the band structure calculation. Finally, we study the MCD spectra at the K-edge, demonstrating that the same mechanism as the magnetic RXS is working.Comment: 9 pages, 9 figures, submitted to Physica Scripta (comment

Valoració de la condició física saludable en els adults (I): antecedents i protocols de la bateria AFISAL-INEFC

La valoració de la condició física saludable es pot utilitzar en la valoració funcional i en la prescripció d'exercici per a la salut i pot constituir, a més, una eina d'utilitat en la investigació de diferents aspectes de l'activitat física i la condició física relacionades amb la salut. En aquest article es descriuen els antecedents, justificació i protocols d'aplicació d'una sèrie de proves que componen la bateria de valoració de la condició física saludable en adults AFISAL-INEFC (Rodríguez et al. 1995 a-c). L'objectiu de la bateria és valorar, de forma senzilla, ràpida i econòmica, alguns dels principals factors de la condició física relacionats amb la salut. Els criteris per al disseny de la bateria de proves han estat els de validesa, fiabilitat, pertinença, seguretat, aplicabilitat i economia. Es van revisar i es van discutir les proves i ítems utilitzats habitualment per valorar els components i factors de la condició física saludable i es va procedir al disseny d'un conjunt de proves que complissin al màxim els criteris establerts. La bateria es composa de vuit proves per a la valoració dels següents factors de la condició física relacionada amb la salut: estat de salut (aptitud general), composició corporal, flexibilitat (del tronc), força màxima (de prensió), força-resistència (abdominal), potència (força explosiva del tren inferior), equilibri (estàtic) i resistència cardiorespiratària

Indolicidin Targets Duplex DNA: Structural and Mechanistic Insight through a Combination of Spectroscopy and Microscopy

Indolicidin (IR13), a 13‐residue antimicrobial peptide from the cathelicidin family, is known to exhibit a broad spectrum of antimicrobial activity against various microorganisms. This peptide inhibits bacterial DNA synthesis resulting in cell filamentation. However, the precise mechanism remains unclear and requires further investigation. The central PWWP motif of IR13 provides a unique structural element that can wrap around, and thus stabilize, duplex B‐type DNA structures. Replacements of the central Trp‐Trp pair with Ala‐Ala, His‐His, or Phe‐Phe residues in the PxxP motif significantly affects the ability of the peptide to stabilize duplex DNA. Results of microscopy studies in conjunction with spectroscopic data confirm that the DNA duplex is stabilized by IR13, thereby inhibiting DNA replication and transcription. In this study we provide high‐resolution structural information on the interaction between indolicidin and DNA, which will be beneficial for the design of novel therapeutic antibiotics based on peptide scaffolds. That′s a wrap! The PWWP short peptide derived from indolicidin provides a unique structural element that stabilizes the DNA duplex. Substitution of Trp residues in PWWP with Ala, His, or Phe significantly destabilizes the DNA duplex structure, thereby establishing a strong correlation between the surface area of the residues (decreasing order: Ala<His≤Phe<Trp) present between the PxxP domain and DNA stabilization.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/108345/1/cmdc_201402215_sm_miscellaneous_information.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/108345/2/2052_ftp.pd

Chemical and structural stability of zirconium-based metal-organic frameworks with large three-dimensional pores by linker engineering

YesThe synthesis of metal–organic frameworks with large three-dimensional channels that are permanently porous and chemically stable offers new opportunities in areas such as catalysis and separation. Two linkers (L1=4,4′,4′′,4′′′-([1,1′-biphenyl]-3,3′,5,5′-tetrayltetrakis(ethyne-2,1-diyl)) tetrabenzoic acid, L2=4,4′,4′′,4′′′-(pyrene-1,3,6,8-tetrayltetrakis(ethyne-2,1-diyl))tetrabenzoic acid) were used that have equivalent connectivity and dimensions but quite distinct torsional flexibility. With these, a solid solution material, [Zr6O4(OH)4(L1)2.6(L2)0.4]⋅(solvent)x, was formed that has three-dimensional crystalline permanent porosity with a surface area of over 4000 m2 g−1 that persists after immersion in water. These properties are not accessible for the isostructural phases made from the separate single linkers.Financial support from EPSRC under EP/H000925, access to the HPC service ARCHER via EP/L000202. S.N. thanks the EU for a Marie Curie fellowship (PIEF-GA-2010-274952). C.M.-G. thanks the Spanish MINECO for a Ramón y Cajal Fellowship (RYC-2012-10894)

Journal of Clinical Monitoring and Computing 2019 end of year summary:monitoring tissue oxygenation and perfusion and its autoregulation

Tissue perfusion monitoring is increasingly being employed clinically in a non-invasive fashion. In this end-of-year summary of the Journal of Clinical Monitoring and Computing, we take a closer look at the papers published recently on this subject in the journal. Most of these papers focus on monitoring cerebral perfusion (and associated hemodynamics), using either transcranial doppler measurements or near-infrared spectroscopy. Given the importance of cerebral autoregulation in the analyses performed in most of the studies discussed here, this end-of-year summary also includes a short description of cerebral hemodynamic physiology and its autoregulation. Finally, we review articles on somatic tissue oxygenation and its possible association with outcome