914 resultados para Aléa moral
Resumo:
This article examines the nature of good and evil through the prism of Star Wars, arguing that the ostensible dichotomy between the ‘good’ Jedi and the ‘evil’ Sith is false, and instead both the Jedi and the Sith engage in violence, which is evil. Anakin Skywalker then arrives as the Christ-figure who becomes evil and ‘dies’ to destroy the old rigid law of the letter adhered to by the Jedi, before resurrecting and sacrificing himself to defeat the Sith transgressors. As Milbank argues, the act of selfless love by Anakin as the Christ-figure therefore produces the good, the end of violent conflict which is ontological peace, and institutes the law of love which leads to life and peace.
Resumo:
A diastereomeric mixture of the tripeptide Boc-Ala-Ile-Aib-OMe crystallized in the space group P1 from CH3OH/H2O. The unit cell parameters are a = 10.593(2) A, b = 14.377(3) A, c = 17.872(4) A, alpha = 104.41(2) degrees, beta = 90.55(2) degrees, gamma = 106.91(2) degrees, V = 2512.4 A3, Z = 4. X-Ray crystallographic studies show the presence of four molecules in the asymmetric unit consisting of two pairs of diastereomeric peptides, Boc-L-Ala-L-Ile-Aib-OMe and Boc-L-Ala-D-Ile-Aib-OMe. The four molecules in the asymmetric unit form a rarely found mixed antiparallel and parallel beta-sheet hydrogen bond motif. The Ala and (L,D)-Ile residues in all the four molecules adopt the extended conformations, while the phi, psi values of the Aib residues are in the right-handed helical region. In one of the molecules the Ile sidechain adopts the unusual gauche conformation about the C beta-C gamma bond.
Resumo:
The molecular mechanism of helix nucleation in peptides and proteins is not yet understood and the question of whether sharp turns in the polypeptide backbone serve as nuclei for protein folding has evoked controversy1,2. A recent study of the conformation of a tetrapeptide containing the stereochemically constrained residue alpha-aminoisobutyric acid, both in solution and the solid state, yielded a structure consisting of two consecutive beta-turns, leading to an incipient 310 helical conformation3,4. This led us to speculate that specific tri- and tetra-peptide sequences may indeed provide a helical twist to the amino-terminal segment of helical regions in proteins and provide a nucleation site for further propagation. The transformation from a 310 helical structure to an alpha-helix should be facile and requires only small changes in the phi and psi conformational angles and a rearrangement of the hydrogen bonding pattern5. If such a mechanism is involved then it should be possible to isolate an incipient 310 helical conformation in a tripeptide amide or tetrapeptide sequence, based purely on the driving force derived from short-range interactions. We have synthesised and studied the model peptide pivaloyl-Pro-Pro-Ala-NHMe (compound I) and provide here spectroscopic evidence for a 310 helical conformation in compound I.
Resumo:
The structures of two crystal forms of Boc-Trp-Ile-Ala-Aib-Ile-Val-Aib-Leu-Aib-Pro-OMe have been determined. The triclinic form (P1, Z = 1) from DMSO/H2O crystallizes as a dihydrate (Karle, Sukumar & Balaram (1986) Proc, Natl, Acad. Sci. USA 83, 9284-9288). The monoclinic form (P2(1), Z = 2) crystallized from dioxane is anhydrous. The conformation of the peptide is essentially the same in both crystal system, but small changes in conformational angles are associated with a shift of the helix from a predominantly alpha-type to a predominantly 3(10)-type. The r.m.s. deviation of 33 atoms in the backbone and C beta positions of residues 2-8 is only 0.29 A between molecules in the two polymorphs. In both space groups, the helical molecules pack in a parallel fashion, rather than antiparallel. The only intermolecular hydrogen bonding is head-to-tail between helices. There are no lateral hydrogen bonds. In the P2(1) cell, a = 9.422(2) A, b = 36.392(11) A, c = 10.548(2) A, beta = 111.31(2) degrees and V = 3369.3 A for 2 molecules of C60H97N11O13 per cell.
Resumo:
In the crystal, the backbone of Boc-(Aib-Val-Ala-Leu)2-Aib-OMe adopts a helical form with four alpha-type hydrogen bonds in the middle, flanked by 3(10)-type hydrogen bonds at either end. The helical molecules stack in columns with head-to-tail hydrogen bonds, either directly between NH and CO, or bridged by solvent molecules. The packing of the helices is parallel, even in space group P2(1). Cell parameters are a = 9.837(2) A, b = 15.565(3) A, c = 20.087(5) A, beta = 96.42(2) degrees, dcalc = 1.091 g/cm3 for C46H83N9O12.1.5H2O.0.67CH3OH. There appears to be some hydration of the backbone in this apolar helix.
Resumo:
The crystal structure analysis of the cyclic biscystine peptide [Boc-Cys1-Ala2-Cys3-NHCH3]2 with two disulfide bridges confirms the antiparallel ?-sheet conformation for the molecule as proposed for the conformation in solution. The molecule has exact twofold rotation symmetry. The 22-membered ring contains two transannular NH ? OC hydrogen bonds and two additional NH ? OC bonds are formed at both ends of the molecule between the terminal (CH3)3COCO and NHCH3 groups. The antiparallel peptide strands are distorted from a regularly pleated sheet, caused mainly by the L-Ala residue in which ?=� 155° and ?= 162°. In the disulfide bridge C? (1)-C? (1)-S(1)-(3')-C?(3')-C?(3'), S�S = 2.030 Å, angles C? SS = 107° and 105°, and the torsional angles are �49, �104, +99, �81, �61°, respectively. The biscystine peptide crystallizes in space group C2 with a = 14.555(2) Ã…, b = 10.854(2) Ã…, c = 16.512(2)Ã…, and ?= 101.34(1) with one-half formula unit of C30H52N8O10S4· 2(CH3)2SO per asymmetric unit. Least-squares refinement of 1375 reflections observed with |F| > 3?(F) yielded an R factor of 7.2%.
Resumo:
An apolar helical decapeptide with different end groups, Boc- or Ac-, crystallizes in a completely parallel fashion for the Boc-analog and in an antiparallel fashion for the Ac-analog. In both crystals, the packing motif consists of rows of parallel molecules. In the Boc-crystals, adjacent rows assemble with the helix axes pointed in the same direction. In the Ac-crystals, adjacent rows assemble with the helix axes pointed in opposite directions. The conformations of the molecules in both crystals are quite similar, predominantly alpha-helical, except for the tryptophanyl side chain where chi 1 congruent to 60 degrees in the Boc- analog and congruent to 180 degrees in the Ac-analog. As a result, there is one lateral hydrogen bond between helices, N(1 epsilon)...O(7), in the Ac-analog. The structures do not provide a ready rationalization of packing preference in terms of side-chain interactions and do not support a major role for helix dipole interactions in determining helix orientation in crystals. The crystal parameters are as follow. Boc-analog: C60H97N11O13.C3H7OH, space group Pl with a = 10.250(3) A, b = 12.451(4) A, c = 15.077(6) A, alpha = 96.55(3) degrees, beta = 92.31(3) degrees, gamma = 106.37(3) degrees, Z = 1, R = 5.5% for 5581 data ([F] greater than 3.0 sigma(F)), resolution 0.89 A. Ac-analog: C57H91N11O12, space group P2(1) with a = 9.965(1) A, b = 19.707(3) A, c = 16.648(3) A, beta = 94.08(1), Z = 2, R = 7.2% for 2530 data ([F] greater than 3.0 sigma(F)), resolution 1.00 A.
Resumo:
The dodecapeptide Boc-(Ala-Leu-Aib)(4)-OMe crystallized with two independent helical molecules in a triclinic cell. The two molecules are very similar in conformation, with a 3(10)-helix turn at the N-terminus followed by an alpha-helix, except for an elongated N(7)...O(3) distance in both molecules. All the helices in the crystal pack in a parallel motif. Eleven water sites have been found in the head-to-tail region between the apolar helices that participate in peptide-water hydrogen bonds and a network of water-water hydrogen bonds. The crystal parameters are as follows: 2(C58H104N12O15)+ca. 10H(2)O, space group P1 with a = 12.946(2), b = 17.321(3), c = 20.465(4) Angstrom, alpha = 103.12(2), beta = 105.63(2), gamma = 107.50(2)degrees, Z = 2, R = 10.9% for 5152 data observed > 3 sigma(F), resolution 1.0 Angstrom. In contrast to the shorter sequences [Karle et al. (1988)Proc. Natl. Acad. Sci. USA 85, 299-303] and Boc-(Ala-Leu-Aib)(2)-OMe [Karle et al. (1989) Biopolymers 28, 773-781], no insertion of a water molecule into the helix is observed. However, the elongated N---O distance between Ala(7) NH and Aib(3) CO in both molecules (molecule A, 3.40 Angstrom; molecule B, 3.42 Angstrom) is indicative of an incipient break in the helices. (C) Munksgaard 1994.
Resumo:
Two crystals structures of a nonapeptide (anhydrous and hydrated) containing the amino acid residue alpha, alpha-di-n-butylglycyl, reveal a mixed 3(10)/alpha-helical conformation. Residues 1-7 adopt phi, psi values in the helical region, with Val(8) being appreciably distorted. The Dbg residue has phi, psi values of -40, -37 degrees and -46, -40 degrees in two crystals with the two butyl side chains mostly extended in each. Peptide molecules in the crystals pack into helical columns. The crystal parameters are C50H91N9O12, space group P2(1), with a = 9.789(1) Angstrom, b = 20.240(2) Angstrom, c = 15.998(3) Angstrom, beta = 103.27(1); Z = 2, R = 10.3% for 1945 data observed >3 sigma(F) and C50H91N9O12. 3H(2)O, space group P2(1), with a = 9.747(3) Angstrom, b = 21.002(8) Angstrom, c = 15.885(6) Angstrom, beta = 102.22(3)degrees, Z = 2, R = 13.6% for 2535 data observed >3 sigma(F). The observation of a helical conformation at Dbg suggests that the higher homologs in the alpha, alpha-dialkylated glycine series also have a tendency to stabilize peptide helices. (C) Munksgaard 1996.
Resumo:
The structure of the peptide Boc-Ala-Leu-Ac(7)c-Ala-Leu-Ac(7)c-OMe (Ac(7)c,1-aminocycloheptane-1-carboxylic acid) is described in crystals. The presence of two Ac(7)c residues was expected to stabilize a 3(10)-helical fold. Contrary to expectation the structural analysis revealed an unfolded amino terminus, with Ala(1) adopting an extended beta-conformation (phi = -93degrees,psi = 112degrees). Residues 2-5 form a 3(10)-helix, stabilized by three successive intramolecular hydrogen bonds. Notably, two NH groups Ala(1) and Ac(7)c(3) do not form any hydrogen bonds in the crystal. Peptide assembly appears to be dominated by packing of the cycloheptane rings that stack against one another within the molecule and also throughout the crystal in columns.
Resumo:
The goals of this study were to analyze the forms of emotional tendencies that are likely to motivate moral behaviors, and to find correlates for these tendencies. In study 1, students narratives of their own guilt or shame experiences were analyzed. The results showed that pure shame was more likely to motivate avoidance than reparation, whereas guilt and combination of guilt and shame were likely to motivate reparation. However, all types of emotion could lead to chronic rumination if the person was not clearly responsible for the situation. In study 2, the relations of empathy with two measures of guilt were examined in a sample of 13- to 16-year-olds (N=113). Empathy was measured using Davis s IRI and guilt by Tangney s TOSCA and Hoffman s semi-projective story completion method that includes two different scenarios, guilt over cheating and guilt over inaction. Empathy correlated more strongly with both measures of guilt than the two measures correlated with each other. Hoffman s guilt over inaction was more strongly associated with empathy measures in girls than in boys, whereas for guilt over cheating the pattern was the opposite. Girls and boys who describe themselves as empathetic may emphasize different aspect of morality and feel guilty in different contexts. In study 3, cultural and gender differences in guilt and shame (TOSCA) and value priorities (the Schwartz Value Survey) were studied in samples of Finnish (N=156) and Peruvian (N=159) adolescents. Gender differences were found to be larger and more stereotypical among the Finns than among the Peruvians. Finnish girls were more prone to guilt and shame than boys were, whereas among the Peruvians there was no gender difference in guilt, and boys were more shame-prone than girls. The results support the view that psychological gender differences are largest individualistic societies. In study 4, the relations of value priorities to guilt, shame and empathy were examined in two samples, one of 15 19-year-old high school students (N = 207), and the other of military conscripts (N = 503). Guilt was, in both samples, positively related to valuing universalism, benevolence, tradition, and conformity, and negatively related to valuing power, hedonism, stimulation, and self-direction. The results for empathy were similar, but the relation to the openness conservation value dimension was weaker. Shame and personal distress were weakly related to values. In sum, shame without guilt and the TOSCA shame scale are tendencies that are unlikely to motivate moral behavior in Finnish cultural context. Guilt is likely to be connected to positive social behaviors, but excessive guilt can cause psychological problems. Moral emotional tendencies are related to culture, cultural conceptions of gender and to individual value priorities.
Resumo:
Tutkimuksen kohteena ovat 2000-luvun alun ala-asteen uskonnon ja elämänkatsomustiedon oppikirjat. Tutkimuksessa kysytään yhtäältä, miten sukupuolia esitetään oppikirjoissa. Toisaalta tarkastellaan oppikirjojen tarjoamia kuvia uskonno(i)sta sukupuolinäkökulmasta katsottuna. Tutkimus sijoittuu uskontososiologian kenttään, koska siinä tarkastellaan, miten uskonnon ja elämänkatsomustiedon opetusmateriaalit suhteutuvat yhteiskunnassamme eläviin sukupuolistereotypioihin. Oppikirjat heijastavat osaltaan yhteiskunnassamme vallitsevia arvoja ja käytäntöjä. Tutkimuksen lähtökohdat ovat kriittisessä feministisessä tutkimuksessa. Tarkoituksena on paljastaa, miten sukupuolia tehdään tutkituissa oppikirjoissa; taustalla on ajatus, että sukupuolet ovat poliittisesti, historiallisesti ja diskursiivisesti tuotettuja kategorioita. Sukupuolijärjestelmään sisältyy sukupuolten erilläänpito, hierarkia ja heteronormatiivisuus. Siihen liittyy myös aina vallankäyttöä: kun jotain määritellään normaaliksi ja ensisijaiseksi, jää sen ulkopuolelle joukko epänormaaliuksia ja toissijaisuuksia. Tutkimus kytkeytyy siis myös teorioihin diskurssien kautta operoivasta, kaikkialla läsnäolevasta ja verkostoituneesta vallasta. Tutkimusaineistona on WSOY:n kustantama uskonnon oppikirjasarja, Suuri kertomus (neljä kirjaa), Otavan kustantama uskonnon oppikirjasarja Tähti (viisi kirjaa), sekä Opetushallituksen kustantamat elämänkatsomustiedon Miina ja Ville kirjat (kaksi kirjaa). Tutkimuksessa tarkastellaan sisällönanalyyttisin keinoin ensisijaisesti kirjojen sisältämiä kuvia, mutta myös tekstejä siltä osin, kuin ne olennaisesti liittyvät analysoituihin kuviin. Koska kyseessä ovat oppikirjat, sivutaan myös niiden suhdetta perusopetuksen opetussuunnitelmien näille oppiaineille määrittelemiin tavoitteisiin. Kuvat on analyysissa jaettu kahteen luokkaan, uskontoon liittyviin ja arkisiin kuviin. Aineisto on käyty läpi etsien vastauksia seuraaviin kysymyksiin: kuinka monessa kuvassa esiintyy tyttö/nainen, poika/mies tai molempia sukupuolia? Miten usein tyttö/nainen, poika/mies tai molemmat sukupuolet ovat kuvassa pääasiallisena toimijana tai kuvan etualalla? Millaisia toimijuuksia eri sukupuolille on annettu, ovatko ne stereotyyppisiä? Löytyykö aineistosta heteronormista poikkeavia esityksiä? Kuvia, joissa stereotyyppisiä sukupuolirooleja erityisesti vahvistetaan tai murretaan, on otettu analyysissa tarkempaan tarkasteluun. Lähempää luettujen kuvien kautta analyysissa käsitellään kulttuurissamme ja yhteiskunnassamme vallitsevia sukupuolittavia käytäntöjä sekä niiden taustalla olevia arvoja ja rakenteita. Uskontoon liittyvien kuvien kohdalla analyysiin kietoutuvat erityisesti uskonno(i)ssa elävät käsitykset sukupuolten järjestyksistä ja paikoista. Keskiöön nousee myös evankelis-luterilaisen kristillisyyden tarjoamat käsitykset sukupuolista ja niiden asemista uskonnonharjoituksessa. Lisäksi tutkimuksessa vertaillaan uskonnon ja elämänkatsomustiedon kirjasarjoista tehtyjä analyyseja keskenään: näkyykö näiden oppiaineiden välillä eroja sukupuolten esittämisessä? Tutkimuksen tulokset ovat suurelta osin samankaltaiset aiemman sukupuolinäkökulmasta tehdyn oppikirjatutkimuksen tulosten kanssa. Poikia ja miehiä esiintyy kuvissa huomattavasti enemmän kuin tyttöjä ja naisia, ja miessukupuolelle on annettu enemmän ja monipuolisempia toimijuuksia kuin naissukupuolelle. Maskuliinisia samastumiskohteita tarjotaan enemmän kuin feminiinisiä. Sukupuolten esitykset ovat enimmäkseen stereotyyppisiä, vaikka joitakin poikkeuksia aineistossa onkin. Vaihtoehtoja heteroseksuaalisuudelle ei aineistossa tuoda esiin. Elämänkatsomustiedon kirjoissa poiketaan stereotyyppisistä esityksistä useammin kuin uskonnon kirjoissa, mutta niidenkin kuvasto on miesvaltainen ja pääosin heteronormatiivinen. Uskontoja esitellään niiden virallisen ja julkisen harjoittamisen kautta, mikä antaa uskonnoista huomattavan mieslähtöisen ja -valtaisen kuvan. Ei esimerkiksi tuoda juurikaan esiin sitä, että monissa uskonnoissa miehet ovat oikeutettuja erilaisiin rooleihin kuin naiset. Naisten uskonnollisuus ohitetaan aineistossa lähes täysin. Taustalla on nähtävissä käsitys miesten ja miehisten elämänpiirien ensisijaisuudesta, kun taas naiset ja naisten elämänpiirit nähdään toiseuden kautta. Tämä ajatusrakennelma on koko kulttuurissamme ja sen perusteissa niin läpikäyvänä, että siihen ei usein kiinnitetä lainkaan huomiota: se näyttäytyy itsestäänselvänä ja ikään kuin luonnollisena asiaintilana. Sukupuolten välinen eriarvoisuus kytkeytyy kuitenkin ihmisten jokapäiväiseen elämään kuten työhön, palkkaan, perhe-elämään ja mahdollisuuksiin toteuttaa itseään ja kehittää taipumuksiaan. Tutkimuksen tulokset tukevat näkemyksiä, joiden mukaan sukupuolten välinen tasa-arvo ei ole yhteiskunnassamme vielä toteutunut. Avainsanat Nyckelord Keywords sukupuoli, oppikirjat, uskonto, elämänkatsomustieto, kuva-analyysi, stereotypia, heteronormatiivisuus, tasa-arvo, sukupuoliroolit, toimijuus
Resumo:
The aim of this study was to investigate educators relational moral voices in urban schools and to listen to what they told about moral professionalism and moral practices in challenging urban schools. Their relational moral voices were investigated through the following three questions: 1. What are the educators moral voices in relation to themselves and other people? 2. What are the educators moral voices in relation to their work and society? 3. What kind of interaction process lies between the educators moral voices and the urban school context? The research data of this study were gathered in four urban schools in Jyväskylä and Helsinki. The research schools were chosen for this study according to the criteria of the international Socrates Comenius project called Leading Schools Successfully in Challenging Urban Context: Strategies for Improvement. This study formed part of this project, which investigated successful urban schools as challenging learning environments in nine European countries and explored the principals success in leadership in particular. The data, which included 37 narratively constructed interviews with four principals and key informants selected by the principals, were gathered in interviews conducted in 2006. In other words, the data comprised three interviews with each of four principals, and interviews with two teachers, two parents, and two pupils from each school. In addition, the school deacon from one school was also interviewed. Furthermore, part of the data from one of the research schools included a medium report of the school deacon s work. This study combined the case study method, the narrative approach and the critical incident technique as the methodological framework. In addition, all of these methods served as practical tools for both analyzing and reporting the data. The educators' narrations and the results of the study appear in the original articles (Hanhimäki & Tirri 2008; Hanhimäki 2008b; Hanhimäki & Tirri 2009; Hanhimäki 2008a). The educators moral voices in relation to themselves and other people emerged through the main themes of moral leadership, the development and evaluation process, moral sensitivity, gender, values, and student well-being. The educators moral voices in relation to their work and society emerged through the main themes of multiprofessional cooperation, families and parental involvement, and moral school culture. The idea of moral interaction connected moral professionalism and the methodological combination of this study, which together emphasized social interaction and the creation of understanding and meaning in this interaction. The main point of this study was to state that the educators moral voices emerged in the interaction between the educators themselves and the urban school context. In this interaction, the educators moral professionalism was constructed and shaped in relation to themselves, other people, their work and society. The loudest relational moral voices heard through the main themes were those of caring, cooperation, respect, commitment, and professionalism. When the results were compared to the codes of ethics which guided these educators moral professional work, the ethical principles and values of the codes were clearly visible in their moral practices. The loudest message from the educators narration could be summarized in the words caring, respect and cooperation: at its best, there is just a human being and a human being with caring, respect and cooperation between them. The results of this study emphasize the need for practical approaches such as case studies and the narrative approach in teacher education to encourage educators to become moral professionals capable of meeting the needs of people of varied backgrounds. In addition, opportunities for moral, religious and spiritual education should be noticed and utilized in the plural interaction of urban schools when nurturing pupils and creating a moral school culture. Furthermore, multiprofessional cooperation and parents as the school s primary cooperation partner are needed to carry out the shared duty of moral education in urban schools. Keywords: moral professionalism, educator, relational moral voice, interaction, urban school