Search results for "SIP"
showing 10 items of 1280 documents
How gender affects gossip and conversation : examining the assumptions in Deborah Tannen's "You just don't understand!" (1990)
2018
Tämä kandidaatintutkielma käsittelee sukupuolta ja sen roolia erilaisissa kielenkäyttötilanteissa, erityisesti juoruilussa. Tutkimuksen tavoitteena on luoda ymmärrystä ja nostaa esiin niitä ennakkoluuloja, joita yhteiskunnassa vallitsee sukupuolia ja juoruilua kohtaan. Tutkimus keskittyy löytämään mahdollisia eroavaisuuksia sukupuolien välillä, tarjoten samalla mahdollisia selityksiä aikaisemman tutkimustiedon valossa. Tutkimuksen tuloksia vertailtiin suosittuun, mutta kiisteltyyn Deborah Tannenin You Just Don’t Understand! (1990) teokseen. Tutkimus toteutettiin nettikyselyllä, jota jaettiin erilaisilla sosiaalisen median sivustoilla mahdollisimman laajan otannan takaamiseksi. Vastauksia ol…
New distributional data on Haemogregarina stepanowi (Apicomplexa) and Placobdella costata (Hirudinea) parasitising the Sicilian pond turtle Emys trin…
2022
The host-parasite system "Emys trinacris - Placobdella costata - Haemogregarina stepanowi"is known for Sicily, but scarce information is available to date about the distribution of the two parasites P. costata and H. stepanowi on the island. Therefore, an extensive sampling effort through visual census and collection and analysis of blood smears of the endemic Sicilian pond turtle E. trinacris was carried out in 46 water bodies scattered throughout mainland Sicily. Our findings revealed that the distribution of both parasites is limited to the Nebrodi area, where the infection of H. stepanowi has shown a high incidence on the local turtle populations. Our data suggest no correlation between…
Stereoselektive synthese von D-α-hydroxycarbonsäuren bzw. D-α-hydroxycarbonsäuren enthaltenden depsipeptiden aus L-aminosäuren
1985
Abstract Depsipeptides containing D-α-hydroxy carboxylic acids are efficiently synthesized by the reactions of L-α-halo-carboxylic acid esters (obtained from L-amino acids) with caesium salts of N-protected amino acids.
Synthese sterisch gehinderter Peptide und Depsipeptide nach einem Säurechlorid-Verfahren mit 2-Phosphonioethoxycarbonyl-(Peoc-)Aminosäuren und -Hydro…
1982
2-(Triphenylphosphonio)ethoxycarbonyl-(Peoc-)aminosauren 1 und -hydroxysauren 5 werden mit Oxalylchlorid in bei Raumtemp. stabile Saurechloride 2 bzw. 6 ubergefuhrt. Mit diesen aktivierten Verbindungen werden sterisch gehinderte Amidbindungen — z. B. in den geschutzten Valin-Peptiden 3a—g und in Hydroxyacyl-Dipeptiden 7 — hergestellt. Nach Schutzgruppenabspaltung aus der voll geschutzten Form 7a entsteht so die Sporidesmolsaure B (9a), die in ihren Eigenschaften mit dem Abbauprodukt aus dem Sporidesmolid I ubereinstimmt. Trotz zweimaliger Anwendung der Saurechlorid-Kondensation ist keine Racemisierung eingetreten. Syntheses of Sterically Hindered Peptides and Depsipeptides by Means of an Ac…
Spinodal decomposition of chemically fueled polymer solutions
2021
Out-of-equilibrium phase transitions driven by dissipation of chemical energy are a common mechanism for morphological organization and temporal programming in biology. Inspired by this, dissipative self-assembly utilizes chemical reaction networks (CRNs) that consume high-energy molecules (chemical fuels) to generate transient structures and functionality. While a wide range of chemical fuels and building blocks are now available for chemically fueled systems, so far little attention has been paid to the phase-separation process itself. Herein, we investigate the chemically fueled spinodal decomposition of poly(norbornene dicarboxylic acid) (PNDAc) solution, which is driven by a cyclic che…
Energy-stable linear schemes for polymer-solvent phase field models
2017
We present new linear energy-stable numerical schemes for numerical simulation of complex polymer-solvent mixtures. The mathematical model proposed by Zhou, Zhang and E (Physical Review E 73, 2006) consists of the Cahn-Hilliard equation which describes dynamics of the interface that separates polymer and solvent and the Oldroyd-B equations for the hydrodynamics of polymeric mixtures. The model is thermodynamically consistent and dissipates free energy. Our main goal in this paper is to derive numerical schemes for the polymer-solvent mixture model that are energy dissipative and efficient in time. To this end we will propose several problem-suited time discretizations yielding linear scheme…
Molecular surfaces: An advantageous starting point for the description of composition-dependent viscosities applied to polymer solutions
1999
The viscosity of polymer/solvent systems is modeled as a function of composition under the premises that the dissipation of energy is taking place at the molecular interfaces and that the friction between solvent and solute varies with composition due to a change in the flow mechanism (drainage of coils). The simple expression obtained in this manner contains three system-specific parameters: a geometric factor γ, which accounts for the differences of the surface to volume ratios of the components; a hydrodynamic parameter α, which measures the friction between solute and solvent in the case of fully draining polymer coils; and β, which corrects for changes in the friction between unlike mo…
The United Nations child policy : international games of morality and power
2013
One confession, multiple chronotopes : The interdiscursive authentication of an apology in an international criminal trial
2021
This paper presents an interdiscursive analysis of a public apology made before the International Criminal Court (ICC) by a Malian Islamist accused of the destruction of cultural heritage in Timbuktu. It analyzes (a) how the defendant's apology metapragmatically inserts itself into a multiplicity of chronotopes and (b) how the two defense counsels subsequently reformulate that apology as part of a ‘confessional chronotope’, thereby decoupling it from its immediate trial surroundings. The entextualization of this confessional chronotope, and the modifications of the trial's participation framework it proposes, reveal how ICC trial actors navigate the multiple tensions facing this emergent fo…
A new member of the fusaricidin family – structure elucidation and synthesis of fusaricidin E
2017
Two hitherto unknown fusaricidins were obtained from fermentation broths of three Paenibacillus strains. After structure elucidation based on tandem mass spectrometry and NMR spectroscopy, fusaricidin E was synthesized to confirm the structure and the suggested stereochemistry. The synthesis was based on a new strategy which includes an efficient access to the 15-guanidino-3-hydroxypentadecanoyl (GHPD) side chain from erucamide.