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Artykuły w czasopismach na temat "II-IV-N₂"
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Sargar, B. M., M. M. Rajmane, and M. A. Anuse. "Selective liquid-liquid extraction of antimony(III) from hydrochloric acid media by N-n-octylaniline in xylene." Journal of the Serbian Chemical Society 69, no. 4 (2004): 283–98. http://dx.doi.org/10.2298/jsc0404283s.
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N-n-Octylaniline in xylene was used for the extraction separation of antimony( III) from hydrochloric acid media. Antimony(III) was extracted quantitatively with 10 mL4%N-n-octylaniline in xylene. It was stripped from the organic phase with 0.5 M ammonia and estimated photometrically by the iodide method. The effect of metal ion, acid, reagent concentration and various foreign ions was investigated. The method affords binary and ternary separation of antimony(III) from tellurium(IV), selenium( IV), lead(II) bismuth(III), tin(IV), germanium(IV), copper(II), gold(III), iron(III) and zinc(II). The method is applicable for the analysis of synthetic mixtures alloys and semiconductor thin films. It is fast, accurate and precise.
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Corrégé, G., and A. Hibbert. "Transitions in C II, N III, and O IV." Atomic Data and Nuclear Data Tables 86, no. 1 (2004): 19–34. http://dx.doi.org/10.1016/j.adt.2003.11.002.
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Nisbet, Matthew L., and Kenneth R. Poeppelmeier. "Crystal structures of [Cu(phen)(H2O)3(MF6)]·H2O (M = Ti, Zr, Hf) and [Cu(phen)(H2O)2F]2[HfF6]·H2O." Acta Crystallographica Section E Crystallographic Communications 77, no. 2 (2021): 165–70. http://dx.doi.org/10.1107/s2056989021000645.
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The crystal structures of three bridged bimetallic molecular compounds, namely, triaqua-2κ3 O-μ-fluorido-pentafluorido-1κ5 F-(1,10-phenanthroline-2κ2 N,N′)copper(II)titanium(IV) monohydrate, [Cu(TiF6)(phen)(H2O)3]·H2O (phen is 1,10-phenanthroline, C12H8N2), (I), triaqua-2κ3 O-μ-fluorido-pentafluorido-1κ5 F-(1,10-phenanthroline-2κ2 N,N′)copper(II)zirconium(IV) monohydrate, [Cu(ZrF6)(phen)(H2O)3]·H2O, (II), and triaqua-2κ3 O-μ-fluorido-pentafluorido-1κ5 F-(1,10-phenanthroline-2κ2 N,N′)copper(II)hafnium(IV) monohydrate, [Cu(HfF6)(phen)(H2O)3]·H2O, (III), and one molecular salt, bis[diaquafluorido(1,10-phenanthroline-κ2 N,N′)copper(II)] hexafluoridohafnate(IV) dihydrate, [CuF(phen)(H2O)2]2[HfF6]·2H2O, (IV), are reported. The bridged bimetallic compounds adopt Λ-shaped configurations, with the octahedrally coordinated copper(II) center linked to the fluorinated early transition metal via a fluoride linkage. The extended structures of these Λ-shaped compounds are organized through both intra- and intermolecular hydrogen bonds and intermolecular π–π stacking. The salt compound [Cu(phen)(H2O)2F]2[HfF6]·H2O displays an isolated square-pyramidal Cu(phen)(H2O)2F+ complex linked to other cationic complexes and isolated HfF6 2− anions through intermolecular hydrogen-bonding interactions.
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Ojala, William, Kendra Lystad, Jonathan Smieja, Jaclyn Fermanich, and Charles Ojala. "Nitrile-Halogen Interactions in Some Bridge-Flipped Isomeric Benzylideneanilines." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C663. http://dx.doi.org/10.1107/s205327331409336x.
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We designate as "bridge-flipped isomers" those pairs of molecules that differ only in the orientation of a bridge of atoms linking two major molecular fragments: in benzylideneanilines, Ar-CH=N-Ar' vs. Ar-N=CH-Ar'; in phenylhydrazones, Ar-NH-N=CH-Ar' vs. Ar-CH=N-NH-Ar' (Ar = aryl). We use them as a context in which to evaluate the roles of molecular conformation, hydrogen bonding, space-filling requirements, and supramolecular synthons in establishing crystalline isomorphism or non-isomorphism. To examine nitrile-halogen and halogen-halogen interactions in solid isomeric benzylideneanilines, we have determined the structures of 2-cyanobenzylidene-2'-iodoaniline (I), 2-iodobenzylidene-2'-cyanoaniline (II), 2-cyanobenzylidene-2'-bromoaniline (III), 2-cyanobenzylidene-2'-chloroaniline (IV), and 2-chlorobenzylidene-2'-cyanoaniline (V) by single-crystal X-ray diffraction. I/II and IV/V are bridge-flipped isomeric pairs. I, III, and IV are isomorphous; the I/II and IV/V pairs are not. In I, III, and IV, translationally related molecules are linked into chains by C≡N···X contacts; no close X···X contacts occur. Although C≡N···X contacts between translationally related molecules define chains in II similar to those in I, III, and IV, and although II likewise lacks close X···X contacts, the molecular packing arrangements differ (monoclinic for I, III, and IV vs. triclinic for II). V in contrast assumes an orthorhombic structure from which the C≡N···X interaction is absent and which is isomorphous with 2-chlorobenzylidene-2'-chloroaniline (VI), the nitrile group of V exchanged for the aniline-side chlorine of VI, that chlorine atom in VI not involved in a close intermolecular Cl···Cl contact. Although neither C≡N···X nor X···X contacts result in isomorphous bridge-flipped isomers in the cases of I/II and IV/V, the C≡N···X contacts apparently play a major structure-defining role and supersede any potential X···X contacts in I-IV.
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Cunha-Silva, Luís, Fa-Nian Shi, Jacek Klinowski, Tito Trindade, João Rocha та Filipe A. Almeida Paz. "Decaaquadioxidobis[μ3-N-(phosphonatomethyl)iminodiacetato]dizinc(II)divanadium(IV) dihydrate". Acta Crystallographica Section E Structure Reports Online 64, № 1 (2007): m39—m40. http://dx.doi.org/10.1107/s1600536807062253.
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Lynch, Sheridan, Genevieve Lynch, Will E. Lynch, and Clifford W. Padgett. "Crystal structures of four dimeric manganese(II) bromide coordination complexes with various derivatives of pyridine N-oxide." Acta Crystallographica Section E Crystallographic Communications 75, no. 8 (2019): 1284–90. http://dx.doi.org/10.1107/s2056989019010557.
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Four manganese(II) bromide coordination complexes have been prepared with four pyridine N-oxides, viz. pyridine N-oxide (PNO), 2-methylpyridine N-oxide (2MePNO), 3-methylpyridine N-oxide (3MePNO), and 4-methylpyridine N-oxide (4MePNO). The compounds are bis(μ-pyridine N-oxide)bis[aquadibromido(pyridine N-oxide)manganese(II)], [Mn2Br4(C5H5NO)4(H2O)2] (I), bis(μ-2-methylpyridine N-oxide)bis[diaquadibromidomanganese(II)]–2-methylpyridine N-oxide (1/2), [Mn2Br4(C6H7NO)2(H2O)4]·2C6H7NO (II), bis(μ-3-methylpyridine N-oxide)bis[aquadibromido(3-methylpyridine N-oxide)manganese(II)], [Mn2Br4(C6H7NO)4(H2O)2] (III), and bis(μ-4-methylpyridine N-oxide)bis[dibromidomethanol(4-methylpyridine N-oxide)manganese(II)], [Mn2Br4(C6H7NO)4(CH3OH)2] (IV). All the compounds have one unique MnII atom and form a dimeric complex that contains two MnII atoms related by a crystallographic inversion center. Pseudo-octahedral six-coordinate manganese(II) centers are found in all four compounds. All four compounds form dimers of Mn atoms bridged by the oxygen atom of the PNO ligand. Compounds I, II and III exhibit a bound water of solvation, whereas compound IV contains a bound methanol molecule of solvation. Compounds I, III and IV exhibit the same arrangement of molecules around each manganese atom, ligated by two bromide ions, oxygen atoms of two PNO ligands and one solvent molecule, whereas in compound II each manganese atom is ligated by two bromide ions, one O atom of a PNO ligand and two water molecules with a second PNO molecule interacting with the complex via hydrogen bonding through the bound water molecules. All of the compounds form extended hydrogen-bonding networks, and compounds I, II, and IV exhibit offset π-stacking between PNO ligands of neighboring dimers.
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Lázaro, Ariadna, Oriol Serra, Laura Rodríguez, Margarita Crespo, and Mercè Font-Bardia. "Luminescence studies of new [C,N,N′] cyclometallated platinum(ii) and platinum(iv) compounds." New Journal of Chemistry 43, no. 3 (2019): 1247–56. http://dx.doi.org/10.1039/c8nj05492d.
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Shaker, Shayma A. "Preparation and Spectral Properties of Mixed-Ligand Complexes of VO(IV), Ni(II), Zn(II), Pd(II), Cd(II) and Pb(II) with Dimethylglyoxime andN-acetylglycine." E-Journal of Chemistry 7, s1 (2010): S580—S586. http://dx.doi.org/10.1155/2010/125136.
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A number of mixed-ligand complexes of the general formula [M(D)(G)] where D=dimethylglyoximato monoanion, G=N-acetylglycinato and M=VO(IV), Ni(II), Zn(II), Pd(II), Cd(II) and Pb(II) were prepared. Each complex was characterized by elemental analysis, determination of metal, infrared spectra, electronic spectra, (1H and13C) NMR spectra, conductivity and magnetic moments. All these complexes were not soluble in some of the organic solvent but highly soluble in dimethylformamide. The conductivity data showed the non-electrolytic nature of the complexes. The electronic spectra exhibited absorption bands in the visible region caused by the d-d electronic transition such as VO(IV), Ni(II) and Pd(II). The IR and (1H,13C) NMR spectra which have indicate that the dimethylglyoxime was coordinated with the metal ions through the N and O atoms of the oxime group andN-acetylglycine was coordinated with metal ions through the N atom and terminal carboxyl oxygen atom.
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Roemmich, James N., Pamela A. Clark, Arthur Weltman, and Alan D. Rogol. "Alterations in growth and body composition during puberty. I. Comparing multicompartment body composition models." Journal of Applied Physiology 83, no. 3 (1997): 927–35. http://dx.doi.org/10.1152/jappl.1997.83.3.927.
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Roemmich, James N., Pamela A. Clark, Arthur Weltman, and Alan D. Rogol. Alterations in growth and body composition during puberty. I. Comparing multicompartment body composition models. J. Appl. Physiol. 83(3): 927–935, 1997.—A four-compartment (4C) model of body composition was used as a criterion to determine the accuracy of three-compartment (3C) and two-compartment (2C) models to estimate percent body fat (%BF) in prepubertal and pubertal boys (genital I & II, n = 17; genital III & IV, n = 7) and girls (breast I & II, n = 8; breast III & IV, n = 15). The 3C water-density (3C-H2O) and 3C mineral-density models, dual-energy X-ray absorptiometry, the Lohman age-adjusted equations, the Slaughter et al. skinfold equations, and the Houtkooper et al. and Boileau bioelectrical impedance equations were evaluated. Agreement with the 4C model increased with the number of compartments (i.e., body water, bone mineral) measured. Except for the 3C-H2O model, the limits of agreement were large and did not perform well for individuals. The mean %BF by dual-energy X-ray absorptiometry (23.6%) was greater than that of the criterion 4C method (21.7%). For the field methods, the Slaughter et al. skinfold equations performed better than did the Houtkooper et al. and Boileau bioimpedance equations. The hydration of the fat-free mass decreased (genital I & II = 75.7%, genital III & IV = 74.8%, breast I & II = 75.5%, breast III & IV = 74.4%) and the mineral content increased (genital I & II = 4.9%, genital III & IV = 5.0%, breast I & II = 5.1%, breast III & IV = 5.7%) with maturation. The density of the fat-free mass also increased (genital I & II = 1.084 g/ml, genital III & IV = 1.087 g/ml, breast I & II = 1.086 g/ml, breast III & IV = 1.091 g/ml) with maturation. All of the models reduced the %BF overprediction of the Siri 2C model, but only the 4C and 3C-H2O models should be used as criterion methods for body composition validation in children and adolescents.
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MELCHER, Ralph, Alexandra HILLEBRAND, Ute BAHR, Bernd SCHRÖDER, Michael KARAS, and Andrej HASILIK. "Glycosylation-site-selective synthesis of N-acetyl-lactosamine repeats in bis-glycosylated human lysozyme." Biochemical Journal 348, no. 3 (2000): 507–15. http://dx.doi.org/10.1042/bj3480507.
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We have studied the elongation of oligosaccharides containing N-acetyl-lactosamine repeats using glycosylated human lysozyme mutants as a model. We reported previously that a combination of glycosylation sites at the 49th (site IV) and 68th (site II) amino acid residues of the protein particularly stimulates the synthesis of N-acetyl-lactosamine repeats [Melcher, Grosch, Grosse and Hasilik (1998) Glycoconjugate J. 15, 987-993]. In the present study we show that it is the carbohydrate attached to site IV that is selectively affected. It contains more N-acetyl-lactosamine repeats when site II is glycosylated in the same molecule. As a corollary of the glycosylation at site II, the synthesis of a third antenna at site IV is increased. The triantennary oligosaccharides at site IV contain more N-acetyl-lactosamine repeats than the biantennary ones. Thus placing a carbohydrate at site II stimulates the branching and the elongation of the carbohydrate at the other site.
Rozprawy doktorskie na temat "II-IV-N₂"
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Piwowarczyk, Przemysław. "Organizacja grup gnostyckich między II a IV w. n. e." Doctoral thesis, Katowice : Uniwersytet Śląski, 2013. http://hdl.handle.net/20.500.12128/5411.
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Nasza praca jest pierwszą w światowej nauce próbą odpowiedzi na pytanie o organizację grup gnostyckich, opartą na analizie wszystkich gnostyckich tekstów z Nag Hammadi, z uwzględnieniem świadectw zewnętrznych. Teksty z Nag Hammadi okazały się materiałem trudnym do jednoznacznej interpretacji, pozwoliły jednak znacznie poszerzyć dotychczasowy stan badań w interesującej nas kwestii. Stąd przytoczona we wstępie teza Julii Iwersen o ich nieprzydatności dla badań nad organizacją grupową została zupełnie sfalsyfikowana.
Pierwszy wniosek, jaki płynie z naszych rozważań, jest taki, że o organizacji grup gnostyckich nie można mówić w sposób generalizujący. Rację zatem mieli w tym punkcie, niezależnie od konkluzji do których ostatecznie doszli, Adolf von Hamack i Heinz Kraft. Nie znaczy to jednak, że nie istnieje żadna wspólny fundament, na którym można by budować argumentację odnośnie do różnych grup. Ponieważ wszystkie znane nam teksty gnostyckie (to znaczy te, których myśl teologiczna może być uznana za gnostycką w świetle przyjętych
przez nas kryteriów) zawierają elementy myśli chrześcijańskiej i/lub zostały nam przekazane przez chrześcijan, to - podobnie jak w wypadku apokryfów Starego Testamentu - musimy uznać je w pierwszym rzędzie właśnie za utwory chrześcijańskie. Nic nie zmusza nas do tego, aby uznawać że którykolwiek z nich, nawet jeśli nie zawiera cech ewidentnie chrześcijańskich, ma przed- czy pozachrześcijańskie pochodzenie.
Jesteśmy w stanie wskazać środowisko, w którym tego typu teksty mogły powstać.
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Virfeu, Agathe. "Modélisations et caractérisations des propriétés de nouveaux absorbeurs solaires II-IV-N₂ (II = Mg ou Zn, IV = Ge ou Sn)." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0006.
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Pour trouver des solutions alternatives à l'utilisation massive des combustibles fossiles et pour satisfaire les besoins énergétiques croissants de la population mondiale, il est indispensable de développer et de démocratiser l’emploi de l’énergie solaire. Dans cet objectif, il convient d’élaborer de nouvelles cellules solaires combinant à la fois une efficacité élevée, un faible coût de production tout en utilisant des éléments chimiques respectueux de l’environnement. Les composés de la famille II-IV-N₂ sont de potentiels candidats puisqu’ils sont constitués d'éléments non toxiques et abondants (zinc, étain, magnésium, etc…). La croissance de ces matériaux du futur a été réalisée dans un équipement, sous ultravide, unique en Europe, nous permettant de garantir une excellente qualité chimique des matériaux. La recherche s’est focalisée sur trois composés ternaires qui sont ZnSnN₂, ZnGeN₂ et MgSnN₂ déposés par co-pulvérisation magnétron réactive. Tout d’abord, l’effet de la polarisation du substrat pendant la croissance des films de ZnSnN₂ a été étudié afin de diminuer la contamination par l’oxygène et d’améliorer les propriétés. Puis la croissance de ZnGeN₂ à différentes températures a mis en lumière des différences de compositions et de structures locales dues à l’évaporation du zinc à des températures élevées. Enfin, la croissance d’un nouveau composé MgSnN₂ a été réalisée à différentes températures de dépôt. L’étude a permis de caractériser avec de nouvelles techniques la structure et l’environnement chimique des atomes d’étain. Ses propriétés sont intermédiaires entre les différents composés à base de zinc comme notamment l’énergie de bande interdite. La seconde spécificité de ces travaux est la compréhension des phénomènes macroscopiques mis en jeu par la modélisation ab initio des propriétés électroniques et optiques. Les prédictions théoriques ont ensuite été confrontées aux résultats expérimentaux et ont montré un bon accord avec les propriétés mesurées. Ces travaux apportent des nouvelles connaissances qui viennent compléter les études précédentes et permettent de nuancer celles rapportées dans la littérature<br>To replace the massive use of polluting fossil fuels and to satisfy the growing energy needs of the world population, it is essential to develop and democratize the use of solar energy. In order to achieve this goal, new solar cells must be developed that combine high efficiency and low production costs with the use of environmentally friendly chemical elements. Nitride compounds of the II-IV-N₂ family are potential candidates since they are made of non-toxic and abundant elements (zinc, tin, magnesium, etc...). The growth of these materials was carried out in an ultra-high vacuum equipment, unique in Europe, which guarantee an excellent chemical quality of the materials. The research are focused on three ternary compounds which are ZnSnN₂, ZnGeN₂ and MgSnN₂ deposited by reactive magnetron sputtering. First of all, the effect of substrate bias has been studied during the growth of ZnSnN₂ films in order to decrease the oxygen contamination and improve the properties. Then, the growth of ZnGeN₂ at different substrate temperatures revealed differences in local compositions and structures due to zinc evaporation at high temperatures. Finally, the growth of a new compound: MgSnN₂ has been performed at different temperatures. In this study, the structure and the chemical environment of tin atoms were characterized with new techniques. Its properties are intermediate between the compounds derived from zinc, such as the band gap energy. The second specificity of this work is the understanding of the macroscopic phenomena by ab initio calculations of the electronic and optical properties. The theoretical predictions were then compared with the experimental results and showed a good agreement with the measured properties. This work provides new knowledge, which completes the previous studies and nuances those reported in the literature
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Lyu, Sai. "First-principles study of II-IV-N2 compounds." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1553701112205839.
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Chagas, Rafael César Russo. "Síntese e caracterização de complexos de Cobre(II) e Estanho(IV) com Ligantes (N,S) e (N,N) Ambidentados." Universidade Federal de Viçosa, 2005. http://www.locus.ufv.br/handle/123456789/7659.
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Previous issue date: 2005-07-29<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Este trabalho envolveu a síntese e caracterização de novos compostos derivados de reações entre organoestânicos, SnCl 4 , CuCl 2 e [Cu(CH 3 COO) 2 ] com os ligantes bis- (2-mercaptopirimidil) alcanos de fórmula geral pymS-(CH 2 )n-Spym (n = 1, 2, 6) e, a base de Schiff N, N'-bis-piridin-2-il-metileno-etano-1,2-diamina de fórmula pyCN- (CH 2 ) 2 -NCpy. Os compostos foram caracterizados via Espectroscopia no Infravermelho, H, 13 C, 119 Sn RMN e Espectroscopia Eletrônica, Cromatografia por Exclusão Molecular (GPC), Termogravimetria (TG), Calorimetria Diferencial Exploratória (DSC), Microanálise e Ponto de fusão. Os produtos derivados da reação entre o SnClPh 3 ou SnCl 2 Ph 2 com o pymS-(CH 2 )n-Spym são pentacoordenados os quais tem o metal formando uma ligação via o átomo de enxofre no primeiro e no segundo. O mesmo não ocorreu nas reações entre o SnCl 3 Ph e SnCl 4 com estes ligantes, onde o metal encontra- se hexacoordenado e quelatado via os átomos de enxofre e nitrogênio. A reação entre o SnClPh 3 com o pyCN-(CH 2 ) 2 -NCpy originou um complexo pentacoordenado no estado sólido bem como em solução via o nitrogênio azo. Os derivados envolvendo os precursores SnCl 2 Ph 2 , SnCl 3 Ph e SnCl 4 são hexacoordenados em solução formando ligações via os nitrogênios azo e piridínico do ligante. A cromatografia por exclusão molecular (GPC) sugere uma pequena polimerização dos derivados da reação entre o SnCl 2 Ph 2 , e o SnCl 4 com a base de Schiff pyCN(CH 2 ) 2 NCpy. As reações entre os precursores de cobre(II) com o pymS-(CH 2 )n-Spym (n = 1, 2) levou a formação de novos compostos nos quais o metal encontra-se coordenado via o átomo de enxofre e o átomo de cloro. A análise por exclusão molecular mostrou a formação de um polímero de massa molecular média de 41511 g/mol resultante da reação entre o CuCl 2 e o pymS- (CH 2 )-Spym. Entretanto, a reação com o [Cu(CH 3 COO) 2 ] não levou a formação de polímeros. Infelizmente nenhuma evidência segundo a mesma técnica até o momento pôde ser inferida para o derivado entre o CuCl 2 com o pymS-(CH 2 ) 2 -Spym. De uma maneira geral a acidez dos precursores de estanho influíram no modo de coordenação com o pymS-(CH 2 )n-Spym (n = 1, 2, 6) preferindo a quelatação com o aumento da acidez. Para os derivados do cobre, a preferência para coordenação ocorreu via o átomo de enxofre.<br>The achievement in this work concerns the synthesis and characterization of novel compounds derivatives of organotin, SnCl 4 , CuCl 2 and [Cu(CH 3 COO) 2 ] with bis- (2-mercaptopyrimidil)alkanes of general formula pymS-(CH 2 )n-Spym (n = 1, 2, 6) and, the Schiff base N,N'-bis-pyridin-2-il-methylene-ethane-1,2-diamine, pyCN-(CH 2 ) 2 - NCpy. The resulting products were characterized by Infrared, 1 H, 13 C, 119 Sn NMR and, Electronic Spectroscopy. In addition, Gel Permeation Chromatography (GPC) Thermogravimetry (TG), Melting point, Differential Scanning Calorimetry (DSC) and Microanalysis. The derivative compounds of reaction between SnClPh 3 as well as SnCl 2 Ph 2 and pymS-(CH 2 )n-Spym have 5-fold coordination whereas the tin atom is bound through sulphur in the former and in the latter. The same did not happen by reacting SnCl 3 Ph and SnCl 4 with those ligands where the metal is 6-coordinated forming a chelate through sulphur and nitrogen atoms. The reaction between SnClPh 3 and pyCN-(CH 2 ) 2 -NCpy have given a 5-fold coordination compound in solid state as well as in solution through the azo nitrogen. The derivatives of SnCl 2 Ph 2 , SnCl 3 Ph and SnCl 4 , however, have 6-fold coordination in solution with the metal bound to the azo nitrogen as well as to the pyridine moiety of the ligand. In addition, the resulting data obtained by DSC have pointed out a degree of polymerization involving the derivatives of reaction between SnCl 2 Ph 2 as well as SnCl 4 and the Schiff base pyCN-(CH 2 ) 2 -NCpy. The chemical reaction involving the copper(II) precursors and pymS-(CH 2 )n-Spym (n = 1, 2) has afforded new compounds in which the metal is bound to the sulphur and chloride moiety. The gel permeation chromatography has given evidence for a polymer formation with an average molar mass of 41511 g/mol as result of reaction between CuCl 2 and pymS-(CH 2 )-Spym. However, the reaction involving [Cu(CH 3 COO) 2 ] did not achieve polymerization. Unfortunately no evidence of polymer formation has been accomplished by the same technique on the reaction product derivative of CuCl 2 and pymS-(CH 2 ) 2 -Spym. As a general fact, the acidity of the tin precursors seems to have an influence on the coordination of those towards pymS-(CH 2 )n-Spym (n = 1, 2, 6) whereas the chelation is favored with the increase of the acid character. Nevertheless the copper derivatives have shown a preference of bonding the sulphur atom.<br>Tese antiga
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Punya, Atchara. "Quasiparticle self-consistent GW band structures of III-N, II-IV-N2 semiconductors and band offsets." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1380888317.
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Bomfim, Filho Lucius Flavius Ourives. "Complexos de Sn(IV) e metais de transição Ni(II), Pd(II) e Pt(II) com ligantes orgânicos N-R-sulfonilditiocarbimatos: síntese, caracterização e avaliação da atividade antifúngica." Universidade Federal de Viçosa, 2014. http://www.locus.ufv.br/handle/123456789/7618.
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Previous issue date: 2014-07-28<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Este trabalho está organizado em três capítulos. No Capítulo 1 são descritas as sínteses de treze compostos organoestânicos com ligantes orgânicos N–R–sulfonilditiocarbimatos. Três desses compostos são neutros e apresentam a fórmula Sn(CH3)2(RSO2NCS2), onde R = C6H5, p–FC6H4, C10H7). Os demais compostos são aniônicos, cinco apresentando como contraíon o tetrabutilamônio, (Bu4N)2[Sn(CH3)2(RSO2NCS2)2], e cinco o tetrafenilfosfônio (Ph4P)2[Sn(CH3)2(RSO2NCS2)2] (R = CH3, C2H5, C6H5, p–FC6H4, C10H7). Os compostos organoestânicos foram caracterizados por análise elementar, condutividade molar, espectroscopias no infravermelho e Mössbauer de 119Sn, de ressonância magnética nuclear de H, 13 C e 119 Sn. No Capítulo 2 são descritas as sínteses de sete complexos aniônicos com metais de transição do grupo 10 – níquel(II), paládio(II) e platina(II). A partir desses ânions foram obtidos seis sais com o contraíon tetrabutilamônio de fórmula geral (Bu4N)2[M(RSO2NCS2)2] onde R = CH3 ou C10H7 e M = Ni(II), Pd(II) ou Pt(II), e um sal de tetrafenilfosfônio de fórmula (Ph4P)2[Ni(C10H7SO2NCS2)2]. Esses compostos foram caracterizados por análise elementar, condutividade molar, espectroscopias no infravermelho, no ultravioleta-visível, de ressonância magnética nuclear de 1H, 13 C, e 195 Pt. A estrutura do composto (Ph4P)2[Ni(C10H7SO2NCS2)2] foi determinada por difração de raios–X. Os dados obtidos apresentaram concordância com as estruturas propostas para os compostos sintetizados. O Capítulo 3 descreve o estudo da atividade antifúngica in vitro dos compostos de estanho sintetizados frente a Botrytis cinerea e Colletotrichum acutatum. Os ensaios biológicos foram realizados seguindo a técnica Poison Food. As atividades biológicas destes compostos foram comparadas a partir dos valores de IC50 obtidos. Os resultados mostraram que os compostos que apresentaram o contraíon tetrafenilfosfônio foram mais ativos do que o fungicida padrão bis(dimetilditiocarbamato)zinco(II).<br>This work is divided in three chapters. Chapter 1 describes the synthesis and characterization of thirteen organotin compounds with N-R-sulfonilditiocarbimato organic ligands. Three compounds are neutral and present the formula Sn(CH3)2(RSO2NCS2), where R = C6H5, p- FC6H4, C10H7. The other compounds are anionic, five of them presenting the tetrabutylammonium as the counterion, (Bu4N)2[Sn(CH3)2(RSO2NCS2)2], and five presenting the tetraphenylphosphonium as the counterion, (Ph4P)2[Sn(CH3)2(RSO2NCS2)2], where R = CH3, C2H5, C6H5, p-FC6H4, C10H7. The organotin compounds were characterized by elemental analysis, molar conductivity, and infrared, ultraviolet-visible, nuclear magnetic resonance of 1H, 13 C, 119 Sn, and 119 Sn Mössbauer spectroscopies. Chapter 2 describes the synthesis and characterization of anionic complexes of seven transition metals of group 10, nickel(II), palladium(II) and platinum(II), with N-R-sulfonilditiocarbimato organic ligands. Six tetrabutylammonium salts were prepared with these complex anions, presenting the formula (Bu4N)2[M(RSO2NCS2)2], where R = CH3 or C10H7, and M = Ni(II), Pd(II), or Pt(II)] and one tetraphenylphosphonium salt was prepared with the formula (Ph4P)2[Ni(C10H7SO2NCS2)2]. The organotin and the transition metal compounds were characterized by elemental analysis, molar conductivity and infrared, ultraviolet-visible, nuclear magnetic resonance of H, 13 C, and 195 Pt. The structure of the compound (Ph4P)2(Ni(C10H7SO2NCS2)2) was determined by X-ray diffraction. The results are in agreement with the proposed structures for the synthesized compounds. Chapter 3 describes the study of in vitro antifungal activity of the organotin compounds against Botrytis cinerea and Colletotrichum acutatum. The bioassays were carried out following the Poison Food technique. The biological activities of these compounds were compared through the determination of IC50 values. The results showed that the compounds that contained the tetraphenylphosphonium counterion were more active than the known fungicide bis(dimethyldithiocarbamate)zinc(II).
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Carvalho, Fabiane Assis. "Síntese e caracterização de complexos N,N'-dietilditiocarbamato de Bi(III), Sn(IV), Ga(III), In(III) e Zn(II) e de seus produtos de decomposição térmica." Universidade Federal de Minas Gerais, 2009. http://hdl.handle.net/1843/BIRC-85TSSL.
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The literature reports several interesting properties of dithiocarbamate ligands.Therefore, N,N-dietyldithiocarbamate anion has been employed in this work to produce Bi(III), Ga(III), In(III), Zn(II) and organotin complexes, in order to explore its ability as single source precursors of inorganic sulfides, in pyrolysis experiments. The work was divided into two parts. The first one comprised the synthesis of the ligand as sodium salt and the preparation of the complexes. All the compounds have been
characterized by NMR, IR, and melting points. Also the thermal behavior of each complex has been studied by thermogravimetric analysis.
In the second part of the work the complexes were thermally decomposed and the corresponding products were characterized by X-ray powder diffraction, X-ray photoelectron spectroscopy (except the organotin complex which was characterized by 119Sn Mössbauer
Spectroscopy) and electronic spectroscopy.<br>Devido às inúmeras vantagens apresentadas pelo grupo dos ligantes ditiocarbamatos, utilizou-se neste trabalho o ligante N,N'-dietilditiocarbamato como agente complexante para obtenção de complexos de bismuto, estanho, gálio, índio e zinco, com o objetivo de explorar suas potencialidades como precursores de fonte única para obtenção de sulfetos. O trabalho foi estruturado em duas etapas, sendo que a primeira consiste na síntese do sal N,N'-dietilditiocarbamato de sódio, empregado como fonte do ligante e a rota de síntese dos complexos metálicos, bem como suas caracterizações através de suas faixas de temperatura de fusão e solubilidade, e pelas das técnicas de ressonância magnética nuclear e absorção na região do infravermelho. A segunda etapa compreende a decomposição térmica dos complexos e a caracterização dos resíduos obtidos. Para tanto, fez-se o estudo do comportamento térmico dos complexos como uma pré-etapa de pirólise, onde foram estabelecidas as melhores condições de trabalho. Posteriormente, realizou-se a decomposição térmica dos precursores em forno tubular e caracterizaram-se os resíduos obtidos. As técnicas empregadas para caracterização dos resíduos foram difração de raios-X, espectroscopia de fotoelétrons emitidos por raios-X (exceto para o resíduo do complexo de estanho, para o qual se utilizou a espectroscopia Mössbauer) e espectroscopia de absorção na região do ultravioleta e visível.
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Berkner, Joachim Ernst. "Synthesis and characterization of new organic electrically conducting polymers : part II: Direct carboxylation of sulfolene : part III: Effect of water on PTC systems : part IV: Mechanism of Phase transfer catalytic N-alkylation reactions." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/30715.
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Estrada, Anthony Armando. "I, Studies directed towards the total synthesis of nocathiacin III II, the development of a new synthetic technology for the construction of N-hydroxyindoles and synthesis of nocathiacin model systems ; III, the development of a mild and selective method for the hydrolysis of esters with trimethyltin hydroxide ; IV, contributions towards the total synthesis of thiostrepton /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p3321980.
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Thesis (Ph. D.)--University of California, San Diego, 2008.<br>Title from first page of PDF file (viewed September 3, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.
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Pagliarini, Olivio. "Chimie moléculaire du niobium et du tantale dans les degrés d'oxydation IV à II : synthèse et réactivité d'alcoxydes du tantale et du bis(cyclopentadienyl)niobium (II)." Nice, 1987. http://www.theses.fr/1987NICE4131.
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ALa synthèse d'alcoolates dinucléaires diamagnétiques du tantale se fait par réduction par l'amalgame de sodium du pentachlorure de tantale en présence de l'organolithien LiOR, (R=iPr et tBu) et d'un ligand neutre(4-picoline), ou par substitution à partir d'un dérivé du tantale. Des dérivés mononucléaires paramagnétiques du tantale sont obtenus par réduction en présence d'un défaut de 4-picoline. Le réservoir d'électrons de la liaison métal-métal multiple de dérivés dinucléaires du tantale est mis à contribution pour des réactions de couplage carbone-carbone d'acétone et de polymérisation de l'alcyne activé DMAC avec formation de structure de type "fly-over". La phosphine PMe3 permet la stabilisation du niobocène en solution ; le complexe bis(cyclopentadienyl)bis(triméthylphosphine)niobium est très réactif. Les ligands PMe3 labiles favorisent la réaction du dérivé avec des substrats insaturés et des petites molécules. Certains ligands à caractère redox souple tels les porphyrines, les catéchols ou les thiolates sont susceptibles, de par leurs transferts électroniques, d'atteindre et de stabiliser des bas degrés d'oxydation du niobium et du tantale
Książki na temat "II-IV-N₂"
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Tavriĭsʹkyĭ nat͡sionalʹnyĭ universytet im. V.I. Vernadsʹkoho, ed. Krym v sarmatskui︠u︡ ėpokhu (II v. do n. ė.--IV v. n. ė.): Sbornik nauchnykh stateĭ. Doli︠a︡, 2013.
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Monakhov, S. I͡U. Amfory Khersonesa Tavricheskogo IV-II vv. do n. ė.: Opyt sistemnogo analiza. Izd-vo Saratovskogo universiteta, 1989.
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Drevneĭshiĭ gorod: Priroda i genezis : Blizhniĭ Vostok, IV-II tysi͡a︡cheletii͡a︡ do n. ė. Nauka, 1996.
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Laporan evaluasi pelaksana[a]n Latihan Peningkatan Mutu Kepemimpinan Resimen Mahasiswa Se Kowilhan I, II dan III/IV, tahun anggaran 1981-1982. Proyek Pembinaan Mahasiswa, Ditjen Pendidikan Tinggi, Departemen P dan K, 1987.
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Sarkofazi lokalne produkcije u Rimskoj Dalmaciji: (od II. do IV. stoljec a) = Die Sarkophage der lokalen Werksta tten im ro mischen Dalmatien : (2. bis 4. Jh. n. Chr.). Knjiz evni Krug, 2010.
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D'Amati, Nicola. L' imposta sul reddito delle persone giuridiche e l'imposta locale sui redditi: I titoli II, III, IV e V del D.P.R. n. 917 del 1986 commentati articolo per articolo. UTET, 1994.
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Płoski, Marcin. Liga Polskich Rodzin jako aktor społeczny. Wydawnictwo Instytutu Socjologii Uniwersytetu Wrocławskiego, 2016. https://www.repozytorium.uni.wroc.pl/dlibra/publication/80114.
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This book is a monograph, on the political party, that shows the birth, rise and fall of the League of Polish Families. In the chapter I the division was made into individual and collective actors. Chapter II is an attempt to describe the birth and functioning of LPF in the context of a broader national movement. Chapter III focuses on the fields of activities of the national party. Chapter IV is an attempt to recreate the role of LPF on the political scene. Chapter V is an attempt to play the role of LPF on the European political scene. Chapter VI is the description of a research taken on the party groups, surveyed with the usage of a questionnaire technique. Chapter VII is an empirical reflection of the views of LPF deputies and senators about political transformation and Polish integration with European structures. The tool for this method was mainly based on an open interview. Chapter VIII is an attempt to present the Polish society in the perspective of political transformation, and the reflection on the degree of civility and democracy and finaly presents the fall of LPF. \n\nNiniejsza książka ma charakter monografii poświęconej partii politycznej, która ukazuje narodziny, rozkwit i upadek Ligi Polskich Rodzin. W rozdziale I dokonany został podział na aktorów zbiorowych i indywidualnych. Rozdział II jest próbą opisu narodzin i funkcjonowania LPR w ramach szerszego ruchu narodowego. Rozdział III koncentruje się na polach aktywności partii narodowej. Rozdział IV jest próbą odtworzenia roli LPR-u na scenie politycznej. Rozdział V jest próbą odtworzenia roli LPR na europejskiej scenie politycznej. Rozdział VI stanowi badawczy portret kół partyjnych, przeprowadzony za pomocą metody ankietowej z zastosowaniem kwestionariusza ankiety. Rozdział VII jest empirycznym odzwierciedleniem poglądów posłów i senatorów LPR na temat transformacji ustrojowej i integracji Polski ze strukturami europejskimi. Narzędziem tej metody był wywiad swobodny otwarty. Rozdział VIII jest próbą przedstawienia społeczeństwa polskiego w perspektywie transformacji ustrojowej, refleksji nad stopniem obywatelskości i demokracji oraz upadkiem LPR.
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Arnold, J. Douglas. Awesome Super Nintendo Secrets. Sandwich Islands Publishing, 1992.
Znajdź pełny tekst źródłaCzęści książek na temat "II-IV-N₂"
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"Federalism, Mk. II, III, IV, V … n." In The Federal Principle. University of California Press, 2023. http://dx.doi.org/10.2307/jj.2430404.8.
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da Silva, Francisco Ordelei Nascimento, Daniel de Lima Pontes, Ana Cristina Facundo de Brito Pontes, and Katherine Lima Bruno. "ESTUDO ESPECTROSCÓPICO E ELETROQUÍMICO DE NOVOS COMPLEXOS MONO E BINUCLEARES DE CU(II) E FE(II) COM LIGANTES NITROGENADOS." In Open Science Research XIII. Editora Científica Digital, 2023. http://dx.doi.org/10.37885/230914337.
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Objetivo: Sintetizar o complexo heterobinuclear de cobre (II) e ferro (II), a partir dos seus precursores – [Cu(phen)(pip)NO2]Cl e Na2[Fe(CN)4(NH3)2], em que a piperazina (pip) apresenta-se como o ligante em ponte entre os dois centros metálicos Métodos: Os complexos mononucleares e binuclear de cobre e ferro foram caracterizados por técnicas espectroscópicas (Espectroscopia vibracional na região do infravermelho, espectroscopia eletrônica na região do Uv-Vis) e eletroquímica (voltametria cíclica) Resultados: Por meio do IV e Uv-vis, foi possível verificar os principais modos vibracionais da fenantrolina e piperazina nos sistemas de cobre, por meio dos estiramentos C=C dos anéis e N-H (1615 cm-1) da amina, bem como bandas intensas com transições π→π* (204, 221, 272 e 293 nm) e n→ π* (204 nm) na região do ultravioleta, respectivamente, além das bandas d-d (625 e 692 nm) do Cu2+ na região do visível. Para os sistemas de ferro, foi possível identificar seus principais estiramentos (νN-H, νC≡N, δFe-CN), por meio do IV, e suas bandas no UV-vis, como a transferência de carga MLCT em 221 nm e d-d do Fe2+. Os voltamogramas cíclicos permitiram a visualização de um sistema quase-reversível para os 3 complexos, com apenas um processo redox cada, referentes ao par Cu2+/1+ e Fe2+/1+ e a sobreposição desses dois no binuclear Conclusão: Os resultados indicam a formação dos compostos propostos neste trabalho.
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Lavilla Rubira, Juan José. "PROCESOS DE PARTICIPACIÓN CIUDADANA EN RELACIÓN CON LAS POLÍTICAS PÚBLICAS, LAS NORMAS Y LOS SERVICIOS PÚBLICOS." In Las políticas de buen gobierno en Andalucía (II): Smart regulation, simplificación administrativa, participaci´ón ciudadana. Instituto Andaluz de Administración Pública, 2022. http://dx.doi.org/10.46735/iaap-pub.5.23.
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Sumario: I. CONSIDERACIONES GENERALES II. RÉGIMEN JURÍDICO GENERAL APLICABLE A LOS DIVERSOS PROCESOS DE PARTICIPACIÓN CIUDADANA EN RELACIÓN CON LAS POLÍTICAS PÚBLICAS, LAS NORMAS Y LOS SERVICIOS PÚBLICOS III. LA PARTICIPACIÓ N CIUDADANA EN RELACIÓN CON LAS POLÍTICAS PÚBLICAS IV. PARTICIPACIÓN CIUDADANA EN RELACIÓN CON LAS NORMAS V. PARTICIPACIÓN CIUDADANA EN RELACIÓN CON LOS SERVICIOS PÚBLICOS
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Calvert, Jack G., Roger Atkinson, Karl H. Becker, et al. "Reactions Of Non-Aromatic Products Of Aromatic Compound Oxidation." In The Mechanisms Of Atmospheric Oxidation Of Aromatic Hydrocarbons. Oxford University PressNew York, NY, 2002. http://dx.doi.org/10.1093/oso/9780195146288.003.0006.
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Abstract The first-generation products formed from the atmospheric reactions of aromatic compounds, discussed in sections II-D, III-D, and IV-D, can also react in the atmosphere with OH radicals, N 03 radicals, and 03, and may photolyze. The available rate coefficient data for ring-retaining products are reviewed and evaluated in sections 11-B, 111-B, and IV-Band photolysis is considered in chapter VII. The available rate coefficient data concerning the reactions of non-aromatic reaction products with OH radicals, N 03 radicals, and03 are dealt with in this chapter. VI-A. Kinetic Data for Reactions of OH Radicals, NO3 Radicals, and Ozone with Non-Aromatic Products of Aromatic Compound Oxidation The format of this section is similar to that of sections 11-B, III-B, and IV-B, and the same abbreviations (see tables 11-B-0, IV-B-0) are used in the tables below for the experimental techniques. The available kinetic data for the OH radical, N03 radical, and 03 reactions are all presented here.
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Kaetzel, Marcia A., and John R. Dedman. "Annexins." In Guidebook to the Cytoskeletal and Motor Proteins. Oxford University PressOxford, 1999. http://dx.doi.org/10.1093/oso/9780198599579.003.0011.
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Abstract The sequence organization of the family is highly conserved (Fig. 3). Annexins consist of a conserved core region composed of four repeated domains and a unique N-terminal tail. Annexin VI is unique in that it contains eight domains. Each core contains several calcium- and phospholipid-binding sites. The sequence conservation for each domain ranges between 40 and 70 per cent when individual family members are compared. The N terminus of each protein confers functional differences and can contain phosphorylation sites for serine/threonine and tyrosine kinases. Annexins II and Xllla are acylated. Annexins I, II, VII, and XI have been shown to bind S-100 EF-hand calcium-binding proteins. Sequences in both the N-terminal and the core regions are required for vesicle fusion by annexin I, F-actin binding by annexin II,2 or ion channel regulation by annexins IV and Vl.
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"Appendix n. Instructions to tasks I, II, III and IV (translated from Dutch)." In The Use of Compensatory Strategies by Dutch Learners of English. De Gruyter, 1990. http://dx.doi.org/10.1515/9783110868975-016.
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Schwarz, Schwarz. "Saccharomyces cerevisiae Mdjlp." In Guidebook to Molecular Chaperones and Protein-Folding Catalysts. Oxford University PressOxford, 1997. http://dx.doi.org/10.1093/oso/9780198599494.003.0040.
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Abstract The nuclear gene for mitochondrial DnaJ (MDJ1) was identified during the sequence analysis of chromosome VI (GenBank accession number D50617x53). The MDJ1 open reading frame encodes a polypeptide of 511 residues (Rowley et al., 1994) that possesses all the features characteristic of a DnaJ protein: (i) an N-terminal J-domain of about 70 amino acid residues; (ii) a 60-residue segment rich in glycine, phenylalanine; (iii) four cysteine-containing repeats with the sequence motif: CXXCXGXG (with X being predominantly a polar or charged residue);, (iv) a C-terminal domain with little sequence conservation to other DnaJ proteins (for detailed reviews about the HSP40/DnaJ protein family see Caplan et al., 1993; Cyr et al., 1994;, the introductory overview to this section, p. 89).
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Barbosa, Edson Silva, and André Francisco Alcântara Fagundes. "TORCER PARA EQUIPES ESPORTIVAS DE OUTROS ESTADOS UMA ANÁLISE DOS FATORES INFLUENCIADORES: GESTÃO DO ESPORTE E ENTRETENIMENTO." In Administração e Marketing: tópicos atuais em pesquisa - Volume 2. Editora Científica Digital, 2023. http://dx.doi.org/10.37885/230212010.
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No âmbito do futebol brasileiro, esta pesquisa propõe identificar os fatores motivacionais que influenciam os indivíduos a torcerem para equipes esportivas de outro estado do País que não seja o de origem do torcedor. Para alcançar esse objetivo, empreendeu-se uma pesquisa qualitativa utilizando-se um questionário online que coletou 184 respostas, sendo 100 consideradas válidas. Para se analisar os dados, utilizou-se da técnica de análise de conteúdo. As respostas foram categorizadas sendo encontrados 18 fatores motivacionais que explicavam o porquê dos entrevistados torcerem por times de futebol de outros estados distintos dos quais eles nasceram, sendo: família; amigos; cônjuge; conquistas do time; jogadores favoritos; qualidade dos jogadores; desempenho do time; postura do time; história do time; gestão; identificação com o clube; preferência pelo esporte; cores; símbolo/escudo; indefinido; exposição na mídia; regionalismo; e grandiosidade da torcida. Posteriormente, esses fatores foram agrupados em oito dimensões que melhor categorizavam os motivos, sendo elas: (i) Pares (N= 58); (ii) Esportivos (N= 44); (iii) Questões existenciais (N= 11); (iv) Elementos de Identificação (N= 8); (v) Indefinido (N= 8); (vi) Mídia (N= 8); (vii) Geográfico (N= 5); e (viii) Periférico (N= 5). Acredita-se que esta pesquisa apresente contribuições tanto no âmbito acadêmico como no gerencial. No contexto acadêmico, destaca-se o fato desse ser um assunto pouco pesquisado além da pesquisa possibilitar a análise de um tipo especifico de consumidores, o esportivo. Gerencialmente, acredita-se que os resultados podem ser importantes para os gestores de organizações esportivas compreenderem melhor seus clientes, que são os torcedores, para que possam definir melhores estratégias mercadológicas para o fortalecimento de suas marcas.
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Schweitzer, George K., and Lester L. Pesterfield. "The Oxygen Group." In The Aqueous Chemistry of the Elements. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780195393354.003.0012.
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The Oxygen Group of the Periodic Table consists of the elements oxygen O, sulfur S, selenium Se, tellurium Te, and polonium Po. The outer electron structure ns2np4 characterizes all five of the elements, with n representing principal quantum numbers 2, 3, 4, 5, and 6, respectively. The ns2np4 indicates the possibility of oxidation states of −II, II, IV, and VI in all of the elements, with O almost always showing a value of −II. As one descends the group, non-metallic character gradually diminishes with only Po being distinctly metallic, and the crossover occurring with the metalloid or semi-metal Te. The II and the VI oxidation states decrease in stability down the group, and the IV oxidation state increases. Oxygen stands out as considerably different from the other elements, there being numerous discontinuities in properties between it and S. Covalent radii in pm are as follows: O(73), S(102), Se(117), Te(135), and Po (149). Ionic radii in pm are as: O−2(126), S−2(170), Se−2(184), and Te−2(207). a. E–pH diagrams. Figure 10.1 depicts the E–pH diagram for O with the soluble species (except H+) at 10−1.0 M. The upper region is occupied by O2, the lower region by H2, and the intermediate area by HOH and its equilibrium species H+ and OH−. This diagram functions as the background for all chemical reactions in HOH solution and in an air or O2 atmosphere. The compound hydrogen peroxide H2O2 is another compound of O and H which is of importance. Because of complicated kinetic behavior, H2O2 can act as either an oxidant or a reductant. Figure 10.2 displays the E–pH diagram for H2O2 at 10−1.0 M when it is functioning as an oxidizing agent. Figure 10.3 is the E–pH diagram for H2O2 at 10−1.0 M when it is acting as a reducing agent. Equations for the lines that separate the species are displayed in the legends of the diagrams.
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Brugger, Daniel, and Matthias Teichert. "Autonome Mobilität – The Next Big Thing? : Implikationen für die Geschäftsmodelle von morgen." In Mobility in a Globalised World 2020. University of Bamberg Press, 2021. http://dx.doi.org/10.20378/irb-58409.
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Die Mobilitätswelt befindet sich aktuell an der Schwelle zu einem großen Umbruch. Die zunehmende Einführung der E-Mobilität, die Entstehung neuer Geschäftsmodelle, das Eintreten neuer Akteure in den Markt der Mobilität sowie die gesteigerte Relevanz von Software und Daten sind die Vorboten eines bevorstehenden Systemwechsels. Der entscheidende Kipppunkt steht jedoch noch aus. Mit der Einführung autonomer Mobilitätslösungen und dem einhergehenden Wechsel vom Piloten zum Passagier wird sich die Mobilitätslandschaft fundamental wandeln. Im Rahmen von Experteninterviews (N = 75) wurden sechs Aspekte dieses Wandels detaillierter beleuchtet: (a) Betreiber und Betreiberkonzepte; (b) Kostenstrukturen und -entwicklungen; (c) Akzeptanz für ausgewählte Mobilitätsangebote (d) Stellenwert von Individualität und Exklusivität; (e) Entwicklungen im Vertrieb bzw. in der Bereitstellung; (f) Geschäftsmodelle mit den Schwerpunkten: (i) Hardware; (ii) Software; (iii) Daten; (iv) Betrieb; (v) Energie/Infrastruktur; (vi) Dual Use. Aufgrund dieser Vielzahl an Handlungsfeldern sind die aktuell zu beobachtenden Entwicklungen mit einem hohen Unsicherheitsfaktor behaftet. Es ist jedoch davon auszugehen, dass sich die Tendenzen des Wandels in den nächsten Jahren klarer herauskristallisieren und die regionalen sowie nationalen Grundrichtungen vorgeben werden.
Streszczenia konferencji na temat "II-IV-N₂"
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Wei, Meng, Qian’ge He, Xuegang Liu, and Jing Chen. "N,N,N′,N′-Tetra-Methyl-3-Oxy-Pentane-1,5-Diamide (TMPDA): A Promising Back Extractant for Ln(III) and Zr(IV)." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29358.
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Water-soluble oxa-diamide ligand, N,N,N′,N′-tetra-methyl-3-oxy-pentane-1,5-diamid (TMPDA) has been synthesized and purified. Its crystal structure, melting point, decomposition temperature, solubilities in aqueous phase and organic phase, distribution ratio between aqueous and organic phase, etc. are reported. The effect of TMPDA concentration in aqueous phase and HNO3 concentration in the equilibrium aqueous phase on the extraction efficiency of La(III), Ce(III), Pr(III), Nd(III), Zr(IV), Fe(III), Y(III), Mo(VI), Ru(III) and Pd(II) by 30% TRPO/kerosene have been studied. The results indicate that TMPDA dissolve well in aqueous phase but almost insoluble in kerosene or 30%TRPO/kerosene in the bi-phase system. It can effectively reduce the extraction of Ln(III), Y(III) and Zr(IV) into 30%TRPO/kerosene at a moderate acid system (0.24mol/L∼0.27mol/L HNO3). TMPDA is a promising stripping agent for Ln(III), Y(III) and Zr(IV) from loaded TRPO.
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Zanotelli, Rosana Medina, Renata H. Sander Reiser, and Benjamín René C. Bedregal. "n-Dimensional Fuzzy Implications: Analytical, Algebraic and Applicational Approaches." In Workshop-Escola de Informática Teórica. Sociedade Brasileira de Computação, 2021. http://dx.doi.org/10.5753/weit.2021.18938.
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The study of n-dimensional fuzzy logic contributes to overcome the insufficiency of traditional FL in modeling imperfect and imprecise information coming from different experts. Based on representability, we extend results from fuzzy connectives to n-dimensional approach. This research on n-dimensional fuzzy implications (n-DI) pass through the next steps: (i) analytical studies; (ii) algebraic aspects; (iii) n-dimensional approach of fuzzy implication classes represented by fuzzy connectives as (S, N)-implications and QL-implications; (iv) studies of n-dimensional R-implications (n-DRI); (v) constructive method obtaining n-DRI based on n-dimensional aggregation operators and (vi) an introductory study considering an n-DI in modeling approximate reasoning.
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Singh, Jitendra, and Girishwar Misra. "A Psycholexical Study of Personality Trait Structure of Hindi Speaking Indians." In International Association of Cross Cultural Psychology Congress. International Association for Cross-Cultural Psychology, 2013. http://dx.doi.org/10.4087/jxjt7641.
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This study adopted a psycholexical approach to uncover the personality trait structure of Hindi speaking Indians. The endorsement for personality descriptive adjectives was obtained from young adults (n=240) using a Likert-type 5-point rating scale. The principal component analysis using varimax rotation revealed a six-factor structure comprised of (I) rajasic (passion and mobility), (II) sattvic (goodness and harmony), (III) tamasic (dullness and inertia), (IV) competence, (V) neuroticism, and (VI) extraversion. The six-factor structure of personality in Hindi language has broader psycholexical space than what is proposed in the “Big Five” personality theory.
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Fontinele, Alexandre, and André Soares. "Um Novo Algoritmo IA-RSA Ciente de Imperfeições de Camada Física para Redes Ópticas Elásticas." In XXX Concurso de Teses e Dissertações da SBC. Sociedade Brasileira de Computação - SBC, 2017. http://dx.doi.org/10.5753/ctd.2017.3458.
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Este artigo prop õe um novo algoritmo de roteamento e alocação de espectro ciente dos efeitos de camada física (IA-RSA - Impairment-Aware Routing and Spectrum Assignment) para redes ópticas elásticas. O objetivo do algoritmo proposto é reduzir a probabilidade de bloqueio causada pela degradação da qualidade de transmiss ão quando novos circuitos s ão estabelecidos. O algoritmo proposto é comparado com outros algoritmos IA-RSA: Modified Dijkstra Path Computation (MD-PC) e K-Shortest Path Computation (KS-PC). Resultados de simulação mostram que o algoritmo proposto apresenta um desempenho superior ao dos algoritmos MD-PC e KS-PC em termos de i) probabilidade de bloqueio de circuitos, ii) probabilidade de bloqueio de banda, iii) justiça no atendimento de diferentes pares de n ós origem e destino e iv) justiça no atendimento de diferentes larguras de banda para as topologias EON e NSFNet.
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Yang, Jingzhou, and Karim Abdel-Malek. "Workspace Analysis and Visualization of Mechanical Manipulators With Non-Unilateral Constraints." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84180.
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An analytical method is presented to obtain all surfaces enveloping the workspace of a general n degree-of-freedom mechanism with non-unilateral constraints. The method is applicable to kinematic chains that can be modeled using the Denavit-Hartenberg representation method for serial manipulators. The method introduced in this paper is based upon analytical criteria for determining singular behavior of the mechanism. A perturbation approach is implemented to determine the interior and exterior of the workspace. The complete mathematical formulation is presented and illustrated using 3 and 4 DOF spatial manipulators. The paper present a rigorous analysis of the sub-Jacobians to determine a classification of singularities: Type I sets are position Jacobian singularities; Type II sets are instantaneous singularities that are due to a generalized joint that is reaching its apex; Type III sets are domain boundary singularities, which are associated with the initial and final values of the time interval; Type IV sets are coupled singularities, which are associated with a relative singular Jacobian, where the null space is reduced in one submatrix due to either of two occurrences: a Type II or Type III singularities. The paper presents a general formulation for determining the workspace.
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Umar, T., and N. Umeokafor. "A NEW SAFETY CLIMATE ASSESSMENT TOOL FOR GULF CONSTRUCTION." In The 9th World Construction Symposium 2021. The Ceylon Institute of Builders - Sri Lanka, 2021. http://dx.doi.org/10.31705/wcs.2021.4.
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One of the methods which could improve the safety performance of construction organizations is the safety climate approach which is helpful to know the existing maturity level of the safety climate and to develop plans to achieve the required level of maturity. Most of the existing safety climate tools were developed considering different industries in developed countries while construction was based only on few tools. Construction projects in the Gulf Cooperation Council (GCC) member countries are at a peak. This article, therefore, attempts to develop a safety climate assessment tool for the Gulf Cooperation Council (GCC) construction industry. A mixed research method consisting of a systematic review (N = 32), structured questionnaire (N = 102) and email interview (N = 19) was adopted in this research. A new assessment tool that has seven factors including (i) Aligning and Integrating Safety As Value (ii) Training At All Level (iii) Improving Site Safety Leadership (iv) Management Commitment (v) Empowering And Involving Workers (vi) Ensuring Accountability At All Level and (vii) Improving Communication has been finally developed. Each factor is supported by a number of simple questions that the participants have to answer on a Likert scale of 1 to 5 is finally developed. Although, the newly developed tool is validated through email interviews held with the construction industry professionals, however, longitudinal studies are recommended to gauge to the effectiveness of the tool.
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Colim, Ana, Rita Morgado, Nuno Sousa, et al. "The transformation of manual workstations with collaborative robotics: the workers' perceptions." In Human Systems Engineering and Design (IHSED 2021) Future Trends and Applications. AHFE International, 2021. http://dx.doi.org/10.54941/ahfe1001172.
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The human factors constitute the focal point of the future Industry 5.0. The introduction of novel technologies (as collaborative robotics) in real-industry scenarios brings challenges related to the acceptance and confidence by the human-workers. The main goal of the current paper is to share the workers’ perceptions about robotics, during a real experience developed in a manufacturing industry. Regarding assess the workers’ perceptions (n = 14 assembly workers), a questionnaire was developed and applied. The elaboration of this questionnaire was based on the bibliographic review of previous studies, and the main topics are the following: (i) workers characterization; (ii) robotics impact in occupational context; (iii) traditional robotics vs. traditional robotics; (iv) requirements that could compromise the HRC implementation. The results highlighted the importance of the workers’ involvement during a process of HRC introduction in a real-industry context, foreseeing a successful implementation with a safety feeling by the workers.
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Hu, B. B., J. T. Darrow, N. M. Froberg, X. C. Zhang, and D. H. Auston. "Generation of ultrafast electromagnetic radiation." In OSA Annual Meeting. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.fn1.
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A large variety of semiconductor samples have been used to generate highly directional, optically steerable, and diffraction-limited ultrafast electromagnetic radiation. Samples have been selected from III-V, II-VI, and group IV semiconductors, including single-crystal, polycrystalline, and amorphous structures. We have compared the optically induced radiated fields from different semiconductor surfaces (interfaces), including an air/semiconductor interface, a metal/semiconductor interface, a p-n junction (solar cell), and a strain-induced piezoelectric layer. In addition, we report the temperature dependence of optically induced electromagnetic pulses. When the surface depletion width was tuned to cross the optical absorption length by varying the sample temperature, a dramatic change of the radiation waveform from the narrow-bandgap semiconductors was observed. We also observed a three-fold rotation symmetry of the radiation from (111)-oriented samples. Finally, we describe the conversion efficiency of optically induced electromagnetic radiation from these samples.
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Both, Ambrus, Daniel Mira, and Oriol Lehmkuhl. "ASSESSMENT OF TABULATED CHEMISTRY MODELS FOR THE LES OF A MODEL AERO-ENGINE COMBUSTOR." In GPPS Chania22. GPPS, 2022. http://dx.doi.org/10.33737/gpps22-tc-70.
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Tabulated chemistry methods present a compromise between computational cost and the ability to capture complex combustion physics in high-fidelity numerical simulations. The application of such models entails a number of modeling decisions, that may affect the simulation results significantly, especially in partially premixed combustion, where the assumption of the existence of underlying premixed or non-premixed flamelet structures is arguable. In this work, different classical tabulation strategies are assessed in terms of their ability to predict the lift-off induced by localized extinction in a model aero-engine combustion chamber: the Cambridge swirl spray flame. The lift-off dynamics of the stable n-heptane spray flame are compared using: i) premixed flamelets, ii) stable and unstable counterflow diffusion flamelets, iii) stable and unsteady extinguishing counterflow diffusion flamelets, iv) unsteady extinguishing and reigniting counterflow diffusion flamelets at a given strain rate. The extinction and reignition events associated to the lift-off are validated against OH-PLIF measurements, and the temporal evolution of the lift-off and reattachment is analyzed.
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M.H, Norlida, Mohammad Aufa M.B, Muhammad Naim Fadzli A.R, Mohd Shahril Shah M.G, and Czahari M. "Effect of Different Fertilizer Management on Water Quality in the Paddy Field." In 2nd International Conference on Agriculture, Food Security and Safety. iConferences (Pvt) Ltd, 2021. http://dx.doi.org/10.32789/agrofood.2021.1002.
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Agricultural intensification is one of the major causes of water pollution. In recent decades, agricultural water quality degradation has become more severe, which in turn emphasizes the importance of improving and implementing sustainable agricultural practices. Precision agriculture variable rate fertilizer application technology is seen as a strategy to reduce environmental pollution caused by excessive fertilizer usage. Fertilizer input rate is altered within the field in response to factors affecting the optimal application rate. The objective of this study was to investigate the effects of uniform rate and variable–rate (N) fertilizer management on surface water quality. Various physical and chemical water quality parameters at the water inlet, paddy field, irrigation canal, and drainage canals were also examined to evaluate seasonal water quality trends. Water sampling was carried out twelve times between September 2018 and July 2019, involving two cultivation seasons within a total of 60 hectares of paddy field in FELCRA Seberang Perak, Malaysia. All water quality measures fall within classes II to IV of the Malaysian National Water Quality Standards (NWQS) with the exception of P, Al, and Fe. In season one, 64% of P, 46% of Al, and 18% of Fe concentrations were found to exceed NWQS Class IV. However, the percentages were lower compared to season two. During the monitoring period, the average concentration of nitrate and ammonia in variable-rate plots was lower than uniform rate plots in both seasons. Furthermore, temperature, Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), pH, Cu, Fe, K, and Mn were significantly different between the two seasons of cultivation.
Raporty organizacyjne na temat "II-IV-N₂"
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Borgonovi, Sara Margherita, Stefania Iametti, and Mattia Di Nunzio. Docosahexaenoic acid as master regulator of cellular antioxidant defenses: a systematic review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2023. http://dx.doi.org/10.37766/inplasy2023.6.0017.
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Review question / Objective: Evaluate the potential effect of DHA in regulating cellular antioxidant enzymes and hypothesizes possible molecular scenarios between DHA and Nrf2 in regulating cellular antioxidant defenses. Eligibility criteria: Chosen studies were published between 1998 and 2021 without restriction regarding pe-riod or publication status. Exclusion criteria were: (i) titles irrelevant to the research topic; (ii) abstract inappropriate or not related to the research topic; (iii) studies that used n-3 PUFAs rich oils which not allowed to discriminate the effect of DHA from other n-3 PUFAs; (iv) studies that co-administrated DHA with other compounds; (v) studies that used DHA oxidation products to better reflect normal nutritional conditions (vi) studies or data with inadequate statistical analysis or inappropriate control. Reviews, letters, ab-stracts, and articles without a complete text in the English language were also excluded.
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Castellano, Mike J., Abraham G. Shaviv, Raphael Linker, and Matt Liebman. Improving nitrogen availability indicators by emphasizing correlations between gross nitrogen mineralization and the quality and quantity of labile soil organic matter fractions. United States Department of Agriculture, 2012. http://dx.doi.org/10.32747/2012.7597926.bard.
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A major goal in Israeli and U.S. agroecosystems is to maximize nitrogen availability to crops while minimizing nitrogen losses to air and water resources. This goal has presented a significant challenge to global agronomists and scientists because crops require large inputs of nitrogen (N) fertilizer to maximize yield, but N fertilizers are easily lost to surrounding ecosystems where they contribute to water pollution and greenhouse gas concentrations. Determination of the optimum N fertilizer input is complex because the amount of N produced from soil organic matter varies with time, space and management. Indicators of soil N availability may help to guide requirements for N fertilizer inputs and are increasingly viewed as indicators of soil health To address these challenges and improve N availability indicators, project 4550 “Improving nitrogen availability indicators by emphasizing correlations between gross nitrogen mineralization and the quality and quantity of labile organic matter fractions” addressed the following objectives: Link the quantity and quality of labile soil organic matter fractions to indicators of soil fertility and environmental quality including: i) laboratory potential net N mineralization ii) in situ gross N mineralization iii) in situ N accumulation on ion exchange resins iv) crop uptake of N from mineralized soil organic matter sources (non-fertilizer N), and v) soil nitrate pool size. Evaluate and compare the potential for hot water extractable organic matter (HWEOM) and particulate organic matter quantity and quality to characterize soil N dynamics in biophysically variable Israeli and U.S. agroecosystems that are managed with different N fertility sources. Ultimately, we sought to determine if nitrogen availability indicators are the same for i) gross vs. potential net N mineralization processes, ii) diverse agroecosystems (Israel vs. US) and, iii) management strategies (organic vs. inorganic N fertility sources). Nitrogen availability indicators significantly differed for gross vs. potential N mineralization processes. These results highlight that different mechanisms control each process. Although most research on N availability indicators focuses on potential net N mineralization, new research highlights that gross N mineralization may better reflect plant N availability. Results from this project identify the use of ion exchange resin (IERs) beads as a potential technical advance to improve N mineralization assays and predictors of N availability. The IERs mimic the rhizosphere by protecting mineralized N from loss and immobilization. As a result, the IERs may save time and money by providing a measurement of N mineralization that is more similar to the costly and time consuming measurement of gross N mineralization. In further search of more accurate and cost-effective predictors of N dynamics, Excitation- Emission Matrix (EEM) spectroscopy analysis of HWEOM solution has the potential to provide reliable indicators for changes in HWEOM over time. These results demonstrated that conventional methods of labile soil organic matter quantity (HWEOM) coupled with new analyses (EEM) may be used to obtain more detailed information about N dynamics. Across Israeli and US soils with organic and inorganic based N fertility sources, multiple linear regression models were developed to predict gross and potential N mineralization. The use of N availability indicators is increasing as they are incorporated into soil health assessments and agroecosystem models that guide N inputs. Results from this project suggest that some soil variables can universally predict these important ecosystem process across diverse soils, climate and agronomic management. BARD Report - Project4550 Page 2 of 249
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Altstein, Miriam, and Ronald Nachman. Rationally designed insect neuropeptide agonists and antagonists: application for the characterization of the pyrokinin/Pban mechanisms of action in insects. United States Department of Agriculture, 2006. http://dx.doi.org/10.32747/2006.7587235.bard.
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The general objective of this BARD project focused on rationally designed insect neuropeptide (NP) agonists and antagonists, their application for the characterization of the mechanisms of action of the pyrokinin/PBAN (PK-PBAN) family and the development of biostable, bioavailable versions that can provide the basis for development of novel, environmentally-friendly pest insect control agents. The specific objectives of the study, as originally proposed, were to: (i) Test stimulatory potencies of rationally designed backbone cyclic (BBC) peptides on pheromonotropic, melanotropic, myotropic and pupariation activities; (ii) Test the inhibitory potencies of the BBC compounds on the above activities evoked either by synthetic peptides (PBAN, LPK, myotropin and pheromonotropin) or by the natural endogenous mechanism; (iii) Determine the bioavailability of the most potent BBC compounds that will be found in (ii); (iv) Design, synthesize and examine novel PK/PBAN analogs with enhanced bioavailability and receptor binding; (v) Design and synthesize ‘magic bullet’ analogs and examine their ability to selectively kill cells expressing the PK/PBAN receptor. To achieve these goals the agonistic and antagonistic activities/properties of rationally designed linear and BBC neuropeptide (NP) were thoroughly studied and the information obtained was further used for the design and synthesis of improved compounds toward the design of an insecticide prototype. The study revealed important information on the structure activity relationship (SAR) of agonistic/antagonistic peptides, including definitive identification of the orientation of the Pro residue as trans for agonist activity in 4 PK/PBANbioassays (pheromonotropic, pupariation, melanotropic, & hindgut contractile) and a PK-related CAP₂b bioassay (diuretic); indications that led to the identification of a novel scaffold to develop biostbiostable, bioavailable peptidomimetic PK/PBANagonists/antagonists. The work led to the development of an arsenal of PK/PBAN antagonists with a variety of selectivity profiles; whether between different PKbioassays, or within the same bioassay between different natural elicitors. Examples include selective and non-selective BBC and novel amphiphilic PK pheromonotropic and melanotropic antagonists some of which are capable of penetrating the moth cuticle in efficacious quantities. One of the latter analog group demonstrated unprecedented versatility in its ability to antagonize a broad spectrum of pheromonotropic elicitors. A novel, transPro mimetic motif was proposed & used to develop a strong, selective PK agonist of the melanotropic bioassay in moths. The first antagonist (pure) of PK-related CAP₂b diuresis in flies was developed using a cisPro mimetic motif; an indication that while a transPro orientation is associated with receptor agonism, a cisPro orientation is linked with an antagonist interaction. A novel, biostablePK analog, incorporating β-amino acids at key peptidase-susceptible sites, exhibited in vivo pheromonotropic activity that by far exceeded that of PBAN when applied topically. Direct analysis of neural tissue by state-of-the-art MALDI-TOF/TOF mass spectrometry was used to identify specific PK/PK-related peptides native to eight arthropod pest species [house (M. domestica), stable (S. calcitrans), horn (H. irritans) & flesh (N. bullata) flies; Southern cattle fever tick (B. microplus), European tick (I. ricinus), yellow fever mosquito (A. aegypti), & Southern Green Stink Bug (N. viridula)]; including the unprecedented identification of mass-identical Leu/Ile residues and the first identification of NPs from a tick or the CNS of Hemiptera. Evidence was obtained for the selection of Neb-PK-2 as the primary pupariation factor of the flesh fly (N. bullata) among native PK/PK-related candidates. The peptidomic techniques were also used to map the location of PK/PK-related NP in the nervous system of the model fly D. melanogaster. Knowledge of specific PK sequences can aid in the future design of species specific (or non-specific) NP agonists/antagonists. In addition, the study led to the first cloning of a PK/PBAN receptor from insect larvae (S. littoralis), providing the basis for SAR analysis for the future design of 2ⁿᵈgeneration selective and/or nonselective agonists/antagonists. Development of a microplate ligand binding assay using the PK/PBAN pheromone gland receptor was also carried out. The assay will enable screening, including high throughput, of various libraries (chemical, molecular & natural product) for the discovery of receptor specific agonists/antagonists. In summary, the body of work achieves several key milestones and brings us significantly closer to the development of novel, environmentally friendly pest insect management agents based on insect PK/PBANNPs capable of disrupting critical NP-regulated functions.