Search results for "SB"
showing 10 items of 1841 documents
Structural distortions in homoleptic (RE)4A (E = O, S, Se; A = C, Si, Ge, Sn): Implications for the CVD of tin sulfides
2001
The structures of Sn(SBut)4 and Sn(SCy)4 have been determined and adopt S4 and D2 conformations respectively; the anion [(PhS)Sn3]−, as its Ph4P+ salt, has a structure approaching Cs symmetry. In all three compounds, there are large variations in the ∠S–Sn–S within the same molecule, which have been rationalised in terms of the C–S–Sn–S–C conformations. For Sn(SR)4, the ∠S–Sn–S increases as the conformations change from trans, trans to trans, gauche and gauche, gauche, as the number of eclipsed lone pairs decreases and this rationale is shown to be applicable to a variety of A(ER)4 (A = C, Si, Ge, Sn; E = O, S, Se) and related [Mo(SR)4, Ga(SR)4−] systems. AM1 calculations have been used to …
Deposition of tin sulfide thin films from tin(iv) thiolate precursors
2001
AACVD (aerosol-assisted chemical vapour deposition) using (PhS)(4)Sn as precursor leads to the deposition of Sn3O4 in the absence of H2S and tin sulfides when H2S is used as co-reactant. At 450 degreesC the film deposited consists of mainly SnS2 while at 500 degreesC SnS is the dominant component. The mechanism of decomposition of (PhS)(4)Sn is discussed and the structure of the precursor presented.
Voltammetric Detection of Lead(II) Using Amide-Cyclam- Functionalized Silica-Modified Carbon Paste Electrodes
2009
2-(4,8,11-Triscarbamoylmethyl-1,4,8,11-tetraazacyclotetradec-1-yl)acetamide (TETAM) derivatives bearing 1, 2, or 4 silylated arms have been synthesized and grafted to the surface of silica gel and ordered mesoporous silica samples. The resulting organic-inorganic hybrids have been incorporated into carbon paste electrodes and applied to the preconcentration electroanalysis of Pb(II). The attractive recognition properties of these cyclam derivatives functionalized with amide pendent groups toward Pb(II) species and the highly porous structure of the adsorbents can be exploited for the selective and sensitive detection of the target analyte. Various parameters affecting the preconcentration a…
Toll Like Receptors as Sensors of the Tumor Microbial Dysbiosis: Implications in Cancer Progression
2021
Microbiota is a complex ecosystem of active microorganisms resident in the body of mammals. Although the majority of these microorganisms resides at the distal gastrointestinal tract, high-throughput DNA sequencing technology have made possible to understand that several other tissues of the human body host their own microbiota, even those once considered sterile, such as lung tissue. These bacterial communities have important functions in maintaining a healthy body state and the host immune system has evolved multiple mechanisms by which maintaining a symbiotic relationship with the microbiota. The maintenance of this dialogue allows the induction of protective responses to pathogens and r…
„Dyplomatyczna Republika Europy ”? Rozważania na temat wpływu wybranych rozwiązań lizbońskich na dyplomację UE w multilateralnym środowisku międzynar…
2018
The aim of the reflections in this article is to analyze the impact of selected institutional solutions adopted by the Treaty of Lisbon on the EU diplomacy in contemporary international relations. The article does not refer to all regulations that concern broadly defined EU External Policy, but those which, by the nature of their connections, content of competence and meaning, became the object of special interest of the treaty architects and whose implementation was to counteract deficits in continuity, coherence and leadership in EU External Policy in pre‑Lisbon period. This assumption determined the structure of the article in which, after a brief reflection on the EU nature in context o…
Il giudice amministrativo e l’applicabilità diretta della CEDU all’indomani dell’entrata in vigore del Trattato di Lisbona in Diritti umani e diritto…
2010
Kuntahallinnon uudelleenorganisointia Suomessa : kuinka käy kulttuuritoimelle?
1999
Meža ugunsgrēki Latvijā un meteoroloģisko apstākļu ietekme uz tiem
2015
Bakalaura darba ietvaros aprakstīti meža ugunsgrēku veidi, to izcelšanas cēloņi un sekas. Aprakstīti meža ugunsgrēku novēršanas un ierobežošanas pasākumi, kā arī to novērošanas un prognozēšanas metodes. Aprakstītas pasaulē, Eiropā un Latvijā izmantotās ugunsbīstamības prognozēšanas metodes. Darbā ir aprakstīta meteoroloģisko apstākļu ietekme uz meža ugunsgrēku norisi un izplatību. Darbā apkopoti dati par meža ugunsgrēku gadījumiem, un raksturota meža ugunsgrēku situācija Latvijā. Apkopoti dati par meteoroloģisko apstākļu ietekmi uz meža ugunsgrēku izplatību pētamajās valsts teritorijās. Izdarīti secinajumi par meža ugunsgrēku izcelšanās cēloņiem, to sezonalitāti un izmaiņu tenedencēm, noska…
IEA EBC Annex83 Positive Energy Districts
2021
At a global level, the need for energy efficiency and an increased share of renewable energy sources is evident, as is the crucial role of cities due to the rapid urbanization rate. As a consequence of this, the research work related to Positive Energy Districts (PED) has accelerated in recent years. A common shared definition, as well as technological approaches or methodological issues related to PEDs are still unclear in this development and a global scientific discussion is needed. The International Energy Agency’s Energy in Buildings and Communities Programme (IEA EBC) Annex 83 is the main platform for this international scientific debate and research. This paper describes the challeng…
Seksuālo minoritāšu identitātes aspektu saistība ar psiholoģisko distresu un uztverto sociālo atbalstu lesbietēm, gejiem un biseksuāliem cilvēkiem.
2015
Pētījuma mērķis bija noskaidrot, kuri seksuālās minoritāšu identitātes aspekti ir saistīti psiholoģisko distresu un uztverto sociālo atbalstu lesbietēm, gejiem un biseksuāliem cilvēkiem. Pētījumā piedalījās 126 dalībnieki, vecumā 18 - 52 gadi. Dalībnieki tika iedalīti trīs pētījuma grupās: lesbietes (n=49); geji (n=41); biseksuāli cilvēki (n=36). Pētījumā tika izmantota Lesbiešu, geju un biseksuālu cilvēku identitātes aptauja, Keslera psiholoģiskā distresa aptauja un Daudzdimensionālā uztvertā sociālā atbalsta aptauja. Tika atklāts, ka visās pētījuma grupās psiholoģiskais distress ir pozitīvi saistīts ar pieņemšanas raizēm, geju grupā ar internalizēto homonegativitāti un biseksuālu cilvēku …