Search results for "stereo"

Perceived threat and prejudice towards immigrants and Russian minorities living in Finland

2017

This study is an attempt to better understand the relationship between Finns and Russian minorities living in Finland. This study considers the role of perceived threats to the attitudes of Finnish adolescents towards Russian minorities. The theoretical framework for this study was the integrated threat theory (ITT). Even though ITT has been revised and threats have been reduced to two major threats (realistic and symbolic threats) (Stephan et al., 2015), this study utilized the original conceptualization of ITT which stipulates that prejudice and negative attitudes towards minorities can be explained by four types of threats that are: realistic threats, symbolic threats, negative stereotyp…

Spin Crossover in Fe(II)–M(II) Cyanoheterobimetallic Frameworks (M = Ni, Pd, Pt) with 2-Substituted Pyrazines

2016

Discovery of spin-crossover (SCO) behavior in the family of Fe(II)-based Hofmann clathrates has led to a "new rush" in the field of bistable molecular materials. To date this class of SCO complexes is represented by several dozens of individual compounds, and areas of their potential application steadily increase. Starting from Fe(2+), square planar tetracyanometalates M(II)(CN)4(2-) (M(II) = Ni, Pd, Pt) and 2-substituted pyrazines Xpz (X = Cl, Me, I) as coligands we obtained a series of nine new Hofmann clathrate-like coordination frameworks. X-ray diffraction reveals that in these complexes Fe(II) ion has a pseudo-octahedral coordination environment supported by four μ4-tetracyanometallat…

N-[3-Methyl-1-phenyl-1-(1H-tetrazol-1-yl)butan-2-yl]acetamide

2016

In the molecule of the title compound, C14H19N5O, the dihedral angle formed between the tetrazole and phenyl rings is 68.39 (4)°. In the crystal, molecules are linked by N—H...N, C—H...N and C—H...O hydrogen bonds to form two-dimensional networks extending parallel to thebcplane.

Tunable Interaction Strength and Nature of the S···Br Halogen Bonds in [(Thione)Br2] Systems

2015

The strength and nature of the S···Br and Br···Br interactions were systematically tuned by altering the electron donor properties of the thione group. Three new halogen-bonded compounds, [(N-methylbenzothiazole-2-thione)Br2]·0.5CH2Cl2 (1), [(2(3H)-benzothiazolethione)Br2] (2), and [(2-benzimidazolethione)Br]·[Br3] (3), were synthesized and studied structurally by using X-ray crystallography and computationally by using charge density analysis based on QTAIM calculations. Analysis of the interaction strength indicated a formation of surprisingly strong S···Br halogen bonds in 1 (−104 kJ mol–1, and RBrS = 0.64) and 2 (−116 kJ mol–1, and RBrS = 0.63) with a substantial covalent contribution. …

Synthesis, antiproliferative activity, and in silico insights of new 3-benzoylamino-benzo[ b ]thiophene derivatives

2014

A new series of 3-benzoylamino-5-imidazol-5-yl-benzo[b]thiophenes and the parent amino derivatives were synthesized and screened as antitumor agents. All tested compounds showed concentration-dependent antiproliferative activity profile against HeLa cell line, exhibiting GI50 values in the low micromolar range. The most active compounds were tested in cell cycle perturbation experiments. A rapid accumulation of cells in the G2/M phase, with a concomitant reduction of cells in both the S and G0/G1 phases, was observed, suggesting that cell exposure to selected derivatives produces mitotic failure. To rationalize the biological results, the 3-benzoylamino-benzo[b]thiophenes were analyzed thro…

Laskenta-ammattilaisuus Tilisanomat-lehdessä vuosina 2010-2015

2017

Tutkielmassa tutkittiin laskenta-ammattilaisuuden stereotypioita Tilisanomat-lehdessä vuosina 2010—2015. Tutkimusaineistona on lehtiartikkelit, joten tutkimus on kvalitatiivinen. Huomioin tutkimuksessa myös kuvat ja mainokset, mutta pääpaino on artikkeleissa. Tutkimusmenetelmänä käytän sisällönanalyysia ja erityisesti luokittelua. Hyödynnän teoriasidonnaista sisällönanalyysia, eli aloitan luokittelun aineiston perusteella ja lopuksi tarkastelen löytyykö aineistosta pavunlaskijan ja muutosagentin stereotypioita, jotka on tunnistettu aiemmassa tutkimuksessa. Löysin aineistosta runsaasti viitteitä pavunlaskijan ja muutosagentin stereotypioista. Tunnistin myös vartijan ja yrittäjän stereotypiat…

Talouselämä-lehden 70- ja 80-luvuilla rakentamat laskenta-ammattilaisten stereotypiat : laskentamiehistä tylsiin kirstunvartijoihin

2010

Tässä tutkielmassa kartoitettiin laskenta-ammattilaisten stereotypioita rakentavia diskursseja, joita Talouselämä-lehdessä on käytetty 70- ja 80-luvuilla. Tutkimusmenetelmänä käytettiin diskurssianalyysia, ja analysoinnin kohteena olivat artikkelit, joissa viitattiin laskentatoimen parissa työskenteleviin henkilöihin. Huomiota kiinnitettiin myös stereotypioiden sukupuolittumiseen. Tämä laadullinen tutkimus koostuu rajatun alueen syvällisestä analysoinnista, jossa on otettu huomioon tutkijan oman kontekstin ja kulttuuritaustan vaikutus tutkimuksen objektiivisuuteen. Tutkimusaineistosta nousi esiin useampia diskursseja, jotka rakensivat laskenta-ammattilaisten stereotypioita tuoden niihin mas…

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 …

Britain through American eyes : a comparative study of two traveller's accounts

2004

Acid–base properties of functionalised tripodal polyamines and their interaction with nucleotides and nucleic acids

2010

Novel, highly positively charged tripodal polyamines with appended heterocyclic moieties revealed an intriguing panel of protonation species within the biologically relevant range. Studied compounds bind nucleotide monophosphates by mostly electrostatic interactions but only the imidazole analogue showed selectivity toward UMP in respect to other nucleotides. Strong binding of all the studied compounds to both ds-DNA and ds-RNA is to some extent selective toward the latter, showing rather rare RNA over DNA preference.