Search results for "ZEN"
showing 10 items of 3479 documents
Local aromaticity in polyacenes manifested by individual proton and carbon shieldings: DFT mapping of aromaticity
2019
Exponential dependencies between locally calculated geometric and magnetic indexes of aromaticity, harmonic oscillator model of aromaticity (HOMA) and nucleus independent chemical shifts (NICS)(0), NICS(1) and NICS(1)zz, and the number of conjugated benzene rings in linear acenes, from benzene to decacene were observed at B3LYP/6-311+G** level of theory. Correlations between HOMA and NICS indexes showed exponential dependencies and were fitted with simple three-parameter function. Similar correlations between both indexes of aromaticity and proton and carbon nuclear isotropic shieldings of individual acene rings were observed. Contrary to proton data, the predicted 13 C nuclear isotropic sh…
NMR Spectra of Some Chlorinated Diphenyliodonium Salts and Iodobenzenes
1996
1971
The polymerisation of ethylene was carried out in the presence of (C5H5)2TiCl2/(C2H5)2AlCl in benzene (I) and of TiCl4/(C2H5)AlCl2 in chlorobenzene (II). In the initial state of the polymerisation with I oligomers with a narrow molecular weight distribution are formed. According to their IR and NMR spectra they were identified as predominantly saturated linear hydrocarbons. The effect of a substitution of the cyclopentadienyl rings by R = CH3 and C2H5 was studied as well as the influence of aging particularly on the molecular weight distribution. The catalytic system II yields predominantly unsaturated branched oligomers with broad molecular weight distribution. The ligand effect on the str…
CCDC 705757: Experimental Crystal Structure Determination
2010
Related Article: K.Salorinne, D.P.Weimann, C.A.Schalley, M.Nissinen|2009|Eur.J.Org.Chem.|2009|6151|doi:10.1002/ejoc.200900814
CCDC 809191: Experimental Crystal Structure Determination
2012
Related Article: J.T.Koivunen, L.Nissinen, J.Kapyla, J.Jokinen, M.Pihlavisto, A.Marjamaki, J.Heino, J.Huuskonen, O.T.Pentikainen|2011|J.Am.Chem.Soc.|133|14558|doi:10.1021/ja206086c
Gold nanoparticle catalysis of the cis-trans isomerization of azobenzene
2013
Ablated, “pseudo-naked” gold nanoparticles (AuNPs) catalyze the cis–trans isomerization of substituted azobenzenes. para-Substitution was found to affect the rate of isomerization, suggesting the participation of AuNP-mediated electron transfer in the isomerization mechanism. Fil: Hallet Tapley, Geniece. University of Ottawa; Canadá Fil: D'Alfonso, Claudio. University of Ottawa; Canadá. Universita Di Roma; Italia Fil: Pacioni, Natalia Lorena. University of Ottawa; Canadá Fil: McTiernan, Cristopher D.. University of Ottawa; Canadá Fil: Gonzalez Bejar, Maria. University of Ottawa; Canadá. Universidad de Valencia; España Fil: Lanzalunga, Osvaldo. Universita Di Roma; Italia Fil: Alarcon, Emilio…
Zvaigžņotā Debess: 2018, Vasara (240)
2018
Jauna hipotēze par I tipa pārnovu izcelšanos ; No 108 minūtēm līdz 96 dienām ; Maiņzvaigznes (astronomija skolā) ; O.Dumbrājs. Nēteres teorēmai 100 gadu ; K.Švarcs. Jauni novērojumi tālā un tuvā kvazārā ; I.P. Īsumā: ALMA un VLT iegūst liecību par zvaigžņu veidošanos tikai 250 miljonus gadu pēc Lielā Sprādziena ; I.Pundure. Lagūnas miglājs – zvaigžņu bērnistaba Habla skatījumā ; I.Pundure. ALMA un APEX atklāj veidojošos galaktiku megasaplūšanu agrīnajā Visumā ; K.Salmiņš. LU Astronomijas institūts pirmais veicis nanopavadoņa S-NET lāzermērījumus ; J.Jaunbergs. Zeme atpakaļskata spogulī ; J.Jaunbergs. Sniegotā Helēne un mazais Polideiks ; R.Misa. Latvijas uzņēmums Eventech piedalīsies Luna-2…
Discerning the Origins of the Amplitude Fluctuations in Dynamic Raman Nanospectroscopy
2012
International audience; We introduce a novel experimental and analytical method for discerning rare surface-enhanced Raman scattering (SERS) events observable at the nanoscale. We show that the kinetics of the Raman activity recorded on an isolated nanostructure is punctuated by intense and rare events of large amplitude and spectral variations. The fluctuations of thousands of SERS spectra were analyzed statistically in terms of power density functions, and the occurrence of the rare events was quantified by a wavenumber statistics. Our analysis enables one to extract valuable and unique spectroscopic signature of Raman variations usually hidden in time-average or space-average measurement…
The Nation-State Relation in the Constitution of the Republic of Poland
2020
Przedmiotem niniejszego opracowania jest ustalenie, w jakich wzajemnych relacjach twórca Konstytucji RP z 1997 r. usytuował naród i państwo. W tekście przedstawiono dwa przeciwstawne nurty, wskazujące, jak postrzegany jest ten stosunek w literaturze tzw. państw zachodu oraz państw, które wstąpiły do tego grona w przeciągu ostatnich dekad. Przedstawione zostały argumenty wskazujące na empiryczną prawdziwość nurtu prezentowanego przez polskich przedstawicieli nauki – nurtu wschodnioeuropejskiego. Wskazano, iż państwo nie jest nieodzownym kryterium narodowotwórczym, a co za tym idzie, iż państwo nie zawsze jest pierwotne względem narodu. Następnie zaprezentowano dwie koncepcje narodu przyjęte …
Smart city ed efficientamento energetico: opportunità e sfide dall’European Green Deal e dai programmi europei
2020
L'efficienza energetica è diventata un argomento centrale nella pianificazione e nella gestione urbana a causa del cambiamento climatico globale e delle emergenze ambientali. L'articolo analizza i modelli e le procedure che sono stati testati nel gruppo MySmartCityProgram da diversi programmi europei che promuovono misure innovative di efficienza energetica a scala di quartiere. L'analisi dei casi studio del Programma ZenN, in particolare, ha evidenziato che struttura della proprietà, erogazione di fondi pubblici e disponibilità di finanziamenti bancari sono i principali fattori critici per raggiungere o ostacolare la fattibilità finanziaria. In vista delle fasi di implementazione del Green…