Search results for "Zen"

The role of H2O in the photocatalytic oxidation of toluene in vapour phase on anatase TiO2 catalyst

1999

Abstract Photocatalytic oxidation of toluene has been carried out in a gas–solid regime by using polycrystalline anatase TiO2 in a fixed-bed continuous reactor. Air containing toluene and water vapours in various molar ratios was fed to the photoreactor irradiated by a medium pressure Hg lamp. Toluene was mainly photo-oxidised to benzaldehyde, and small amount of benzene, benzyl alcohol and traces of benzoic acid and phenol were also detected. In the presence of water, no decrease of photoreactivity was observed at steady-state conditions. By removing water vapour from the feed, the conversion of toluene to benzaldehyde was almost completely inhibited, and an irreversible deactivation of th…

Structure-based evaluation of the resonance interactions and effectiveness of the charge transfer in nitroamines

2011

Structural data for five nitroamines of general formula Me2N–G–NO2 show effectiveness of the ground-state charge transfer to be most and least efficient in N,N-dimethylnitramine and in 4-N,N-dimethylamino-β-nitrostyrene, respectively. Electron-donor power of the amino nitrogen atom in the latter compound is less than that in 4-nitro-β-N,N-dimethylaminostyrene (these two compounds are isomers). Natural population analysis shows that the charge transfer from the amino to the nitro oxygen atoms is most effective in N,N-dimethylnitramine, Me2N–NO2. The nitro oxygen atoms are not the only acceptors of the negative charge lost by the amino nitrogen atom. The nitro group in two substituted nitrobe…

Ubezpieczenia społeczne osób prowadzących pozarolniczą działalność gospodarczą

2017

Training Citizenship and Intercultural Education in Europe: An Introduction to Tra.C.I.E. Project.

2008

Inquiry Based Learning and Responsible Research and Innovation: Examples of Interdisciplinary Approaches at Different Schooling Levels

2021

The Inquiry-Based approach to Science Education (IBSE) is presented in scienti#c literature (Hake, 1998; Sharma et al., 2010) and in research projects reports (e.g. ESTABLISH, 2010; SAILS, 2014) as a credible solution to the reported lack of ef#cacy of more ‘traditional’ educative approaches, especially when focused on Research and Innovation (RRI) (Sutcliffe, 2006; IRRESISTIBLE, 2013; Ark of Inquiry, 2013). IBSE is an inductive approach to science teaching that considers direct experience at the center of learning. IBSE activities and strategies actively involve students in the identi#cation of relevant evidence, in critical and logical reasoning on the evidence collected and in re+ection …

Latviešu kino reprezentācija medijos (2010-2014)

2015

Bakalaura darba tēma ir “Latviešu kino reprezentācija medijos (2010-2014).” Šī darba galvenais mērķis ir noteikt kāda ir interneta medijos “Delfi.lv” un “Tvnet.lv” atspoguļotā informācija par latviešu kino un kā tā ir mainījusies pēdējo gadu laikā, noskaidrot, kā šie dati ietekmē rēalo situāciju latviešu kino. Darba teorētiskā daļa sastāv no teorijas par reprezentāciju, tās ietekmi uz auditoriju un publisko viedokli, kā arī par latviešu kino pēdējo gadu aktualitātēm. Darbā izmantotās metodes ir kontentanalīze, daļēji strukturēta intervija un fokusgrupas diskusija. Pētījuma rezultātā tika secināts, ka informācija, kas pieejama medijos, visbiežāk, ir saistīta ar filmu aktualitātēm un latviešu…

Intra-Acting Food Citizenship in Community-Supported Agriculture in Finland

2023

Citizens are called upon to become active participants in creating a more sustainable food system. As food citizens, people participate in defining and constructing their food systems according to their needs and values. In food policies, the concept of food citizenship is often left undefined or with reference only to individual activities. In the food citizenship literature, the role of nonhuman agency in constituting food citizenship needs more examination. Here we investigate food citizenship activities in a citizen-led community-supported agriculture group and explore the role of materiality in constituting food citizenship. We ask (1) what is the role of material-discursive arrangemen…

DOSY NMR, X-ray Structural and Ion-Mobility Mass Spectrometric Studies on Electron-Deficient and Electron-Rich M6L4 Coordination Cages.

2015

A novel modular approach to electron-deficient and electron-rich M6L4 cages is presented. From the same starting compound, via a minor modulation of the synthesis route, two C3-symmetric ligands L1 and L2 with different electronic properties are obtained in good yield. The trifluoro-triethynylbenzene-based ligand L1 is more electron-deficient than the well-known 2,4,6-tri(4-pyridyl)-1,3,5-triazine, while the trimethoxy-triethynylbenzene-based ligand L2 is more electron-rich than the corresponding benzene analogue. Complexation of the ligands with cis-protected square-planar [(dppp)Pt(OTf)2] or [(dppp)Pd(OTf)2] corner-complexes yields two electron-deficient (1a and 1b) and two electron-rich …

Sintesi e attività antiproliferativa di nuovi composti eterociclici

2014

Benzen i metan jako wzorce przesunięcia chemicznego 1 H i 13 C NMR w obliczeniach teoretycznych

2020

NMR spectroscopy belongs to the most versatile techniques used in chemical laboratory for testing the presence of various compounds and elucidation of their structure. In case of more complex natural products chemical intuition and experience applied to analysis of experimental spectra is often supported by theoretical modeling of NMR spectra. However, theoretical predictions should be reliable and the errors associated with the approximations inherent to the existing methods minimized. In this respect, systematic errors, present in calculation of isotropic nuclear magnetic shieldings of the studied molecule need to be minimized. Conversion of nuclear shieldings of the studied molecule to t…