Search results for "SSB"

A M�ssbauer and ESR study of LiNbO3-Fe2O3 for low Fe2O3 concentrations

1989

Samples of the system LiNbO3-Fe2O3 prepared by water quenching and by the double-roller quenching method in the range up to 24 mol% Fe2O3 were investigated by Mossbauer and ESR spectroscopy. In the water quenched samples up to 11 mol% Fe2O3 only the Fe3+ and the Fe2+ valence states could be detected. The Fe2+ concentration decreased with increasing Fe2O3 content. Above 11 mol% Fe2O3 magnetically split Mossbauer spectra indicated the presence of Fe2O3 clusters. The isomer shift values of Fe3+ as a function of Fe2O3 concentration showed jumps at 6 and 11 mol% Fe2O3, whereas no significant changes could be detected in the quadrupole splitting values. The ESR data already exhibited the existenc…

Dynamics of Metal Centers Monitored by Nuclear Inelastic Scattering

2005

Nuclear inelastic scattering of synchrotron radiation has been used now since 10 years as a tool for vibrational spectroscopy. This method has turned out especially useful in case of large molecules that contain a M\"ossbauer active metal center. Recent applications to iron-sulfur proteins, to iron(II) spin crossover complexes and to tin-DNA complexes are discussed. Special emphasis is given to the combination of nuclear inelastic scattering and density functional calculations.

Evaluation of the orthodontic treatment need in a paediatric sample from Southern Italy and its importance among paediatricians for improving oral he…

2017

Background Data from epidemiological studies investigating the prevalence and severity of malocclusions in children are of great relevance to public health programs aimed at orthodontic prevention. Previous epidemiological studies focused mainly on the adolescence age group and reported a prevalence of malocclusion with a high variability, going from 32% to 93%. Aim of our study was to assess the need for orthodontic treatment in a paediatric sample from Southern Italy in order to improve awareness among paediatricians about oral health preventive strategies in pediatric dentistry. Material and methods The study used the IOTN-DHC index to evaluate the need for orthodontic treatment for seve…

Voiko etiikkaa opettaa : etiikan opetettavuuden tarkastelua Lawrence Kohlbergin, D. Z. Phillipsin ja Martha C. Nussbaumin ajattelun valossa

2016

VOIKO ETIIKKAA OPETTAA? Etiikan opetettavuuden tarkastelua Lawrence Kohlbergin, D. Z. Phillipsin ja Martha C. Nus- sabumin ajattelun valossa Vesa Nuorva Filosofia Pro gradu –tutkielma Yhteiskuntatieteiden ja filosofian laitos Ohjaaja: Professori Mikko Yrjönsuuri Kevät 2016 129 sivua Tutkimuksen tehtävänä oli selvittää etiikan opetuksen mahdollisuutta ja mielekkyyttä yleissivistä- vässä ja ammatillisessa koulutuksessa Suomessa. Näitä koulutuksia säätelevät lait edellyttävät, että oppilaista tulee eettisesti hyvin käyttäytyviä ja vastuullisia kansalaisia. Tutkimuksen näkökulma ei kuitenkaan ole ollut etiikan opetuksessa pedagogisena prosessina, vaan etiikan opetettavuu…

La persona disabile nel pensiero politico di Martha Nussbaum

2010

Transport of Antarctic stratospheric strongly dehydrated air into the troposphere observed during the HALO-ESMVal campaign 2012

2015

Abstract. Dehydration in the Antarctic winter stratosphere is a well-known phenomenon that is annually observed by satellites and occasionally observed by balloon-borne measurements. However, in situ measurements of dehydrated air masses in the Antarctic vortex are very rare. Here, we present detailed observations with the in situ and GLORIA remote sensing instrument payload aboard the German aircraft HALO. Strongly dehydrated air masses down to 1.6 ppmv of water vapor were observed as far north as 47° S in an altitude between 12 and 13 km in the lowermost stratosphere. The dehydration can be traced back to individual ice formation events above the Antarctic Peninsula and Plateau, where ice…

.Single-Ion Magnetic Behaviour in an Iron(III) Porphyrin Complex: A Dichotomy Between High Spin and 5/2-3/2 Spin Admixture

2020

International audience; A mononuclear iron(III) porphyrin compound exhibiting unexpectedly slow magnetic relaxation, which is a characteristic of single-ion magnet behaviour, is reported. This behaviour originates from the close proximity (approximate to 550 cm(-1)) of the intermediate-spinS=3/2 excited states to the high-spinS=5/2 ground state. More quantitatively, although the ground state is mostlyS=5/2, a spin-admixture model evidences a sizable contribution (approximate to 15 %) ofS=3/2 to the ground state, which as a consequence experiences large and positive axial anisotropy (D=+19.2 cm(-1)). Frequency-domain EPR spectroscopy allowed them(S)= |+/- 1/2⟩->|+/- 3/2&Rig…

A HYBRID SOLAR CELLS INTEGRATED GLASSBLOCK AND PRESTRESSED PANEL MADE OF DRY-ASSEMBLED GLASSBLOCKS FOR THE CONSTRUCTION OF TRASLUCENT BUILDING ENVELO…

2016

A glassblock integrated with hybrid photovoltaic cells (also known as Dye-sensitized Solar Cell - DSC) and a dry-assembled panel made of traditional or DSC-integrated glassblocks are disclosed. The combination of the glassblock and the DSC module, allows the improvement of the glassblock performance in terms of energy saving and production. The final complete product owns the qualities of both the components (glassblock and DSC module) that are optimized to produce clean energy. The transparency and the thermo-acoustic insulation of the glassblock may be modulated according to the specific requirements of each case of installation. Since the DSCs can be printed in different colours and with…

Thermodynamic and spectroscopic study of the binding of dimethyltin(IV) by citrate at 25°C

2006

Thermodynamic (potentiometric and calorimetric) and spectroscopic ( 1 H NMR, 119 Sn Mossbauer) studies were performed in aqueous solution in order to characterize the interaction of dimethyltin(IV) cation with citrate ligand. Six species {(CH 3 ) 2 Sn(cit) - ; [(CH 3 ) 2 Sn] 2 (cit) 2 2- ; (CH 3 ) 2 Sn(cit)H 0 ; (CH 3 ) 2 Sn(cit)OH 2- ; [(CH 3 ) 2 Sn] 2 (cit)OH 0 ; [(CH 3 ) 2 Sn] 2 (cit)(OH) 2 - } were found. All the species formed in this system are quite stable and formation percentages are fairly high. For example, at pH = 7.5 and C (CH3)2Sn = C cit = 10 mmol l -1 , E% for [(CH 3 ) 2 Sn] 2 (cit)(OH) 2 - and (CH 3 ) 2 Sn(cit)OH 2- species reaches 65%. Overall thermodynamic parameters obta…

Språkbadselevers skriftliga kunskaper i svensk grammatik enligt utvecklingsnivåerna av processbarhetsteorin

2016

Tutkielman tarkoituksena oli tarkastella kuudesluokkalaisten kielikylpyoppilaiden ruotsin kieliopin taitoja Manfred Pienemannin prosessoitavuusteorian valossa. Tärkein tutkimuskysymys oli, mille teorian viidestä tasosta oppilaat sijoittuvat. Tutkimuksen materiaalina oli 12 19 oppilaan kirjoittamaa kirjoitelmaa, eli osa kirjoitelmista oli kirjoitettu ryhmässä. Tutkimus oli kvalitatiivinen ja menetelmänä käytettiin teorialähtöistä sisällönanalyysiä. Tulokset osoittivat, että oppilaat sijoittuivat prosessoitavuusteorian neljännelle ja viidennelle tasolle. Parityöskentelystä johtuen tuloksia voidaan tarkastella ennemmin ryhmä- kuin yksilötasolla. Pienestä aineistosta johtuen tuloksia ei myöskää…