Search results for "TG"
showing 10 items of 2275 documents
Methyl 3',4',5'-trimethoxybiphenyl-4-carboxylate
2013
In the title compound, C17H18O5, the dihedral angle between the benzene rings is 31.23 (16)°. In the crystal, the molecules are packed in an antiparallel fashion in layers along the a axis. In each layer, very weak C-H...O hydrogen bonds occur between the methoxy and methyl ester groups. Weak C-H...[pi] interactions between the 4'- and 5'-methoxy groups and neighbouring benzene rings [methoxy-C-ring centroid distances = 4.075 and 3.486 Å, respectively] connect the layers.
Poly[[myy-N,N'-bis(2-hydroxyethyl)-N,N,N',N'-tetramethylpropane-1,3-diaminium-kappa2O:O']tetra-myy-bromido-dibromidodimanganese(II)]
2012
The asymmetric unit of the title three-dimensional coordination polymer, [Mn2Br6(C11H28N2O2)]n, consists of one MnII cation, half of a dicationic N,N0 -bis(2-hydroxyethyl)- N,N,N0 ,N0 -tetramethylpropane-1,3-diaminium ligand (L) (the other half being generated by a twofold rotation axis), and three bromide ions. The MnII cation is coordinated by a single L ligand via the hydroxy O atom and by five bromide ions, resulting in a distorted octahedral MnBr5O coordination geometry. Four of the bromide ions are bridging to two adjacent MnII atoms, thereby forming polymeric chains along the a and b axes. The L units act as links between neighbouring Mn—(-Br)2—Mn chains, also forming a polymeric con…
Orgaanisten yhdisteiden kiinteän tilan rakennemääritysmenetelmät
2011
Pro gradu -tutkielmassa käydään läpi 16 yleistä orgaanisten yhdisteiden kiinteän tilan rakennemääritysmenetelmää. Erityistä huomiota on tutkielmassa osoitettu röntgendiffraktiolle, kiinteän tilan NMR-spektroskopialle ja infrapunaspektroskopialle. Erikoistyössä valmistettiin kaksi uutta amidofoldameeriä ja yksi uusi sulfonyylifoldameeri. Valmistettujen yhdisteiden ominaisuuksia tutkittiin ja niitten rakenteet määritettiin. Lisäksi määritettiin yhden muodostetun fluorikompleksin rakenne.
N-{4-[(3-Methylphenyl)sulfamoyl]phenyl}benzamide
2011
In the title compound, C20H18N2O3S, the dihedral angle between the central benzene ring and the amide group is 24.1 (3) and that between this ring and the aromatic ring of the tolyl group is 68.2 (16). In the crystal, adjacent molecules are linked by N—HO hydrogen bonds into a linear chain running along [100]. Weak C—HO contacts also occur. Extensive weak – interactions exist from both face-to-face and face-to-edge interactions occur between the aromatic rings [centroid–centroid distances = 3.612 (2) and 4.843 (2) A˚ ]. Related peerReviewed
A method for measuring wetting and swelling of bentonite using X-ray imaging
2022
A non-invasive method based on X-ray imaging for measuring deformation and water transport in wetting and swelling bentonite samples is introduced. Sequential X-ray images taken of the samples were used to calculate the attenuation coefficient and deformation. These results, together with careful calibration, allowed finding the dry density and water content distributions and their temporal evolution in the wetting and swelling samples. A specific correction technique, based on regularly taking reference X-ray images of aluminum plates of varying thickness, was developed and used to take into account X-ray beam instabilities and thus to improve the accuracy of density analysis. Large deform…
1,1,4,4-Tetramethylpiperazinediium dibromide
2009
A small quantity of the title compound, C8H20N22+·2Br−, was formed as a by-product in a reaction between a diamine and an alkyl bromide. The asymmetric unit contains half of a centrosymmetric dication and a bromide anion. In the crystal, weak intermolecular C—H...Br hydrogen bonds consolidate the crystal packing.
Mallipäällysterakenteiden analysoiminen röntgentomografian avulla
2008
Jaunlatgales (Abrenes) pilsēta 1933.-1940.gadā: pārvalde, iedzīvotāji un sabiedriskā dzīve
2017
Pētījums veltīts līdz šim historiogrāfijā neaplūkotai tēmai – Jaunlatgales (Abrenes) pilsētas pārvaldei, iedzīvotājiem un sabiedriskajai dzīvei no pilsētas tiesību iegūšanas 1933.gadā līdz Latvijas okupācijai 1940.gadā. Mērķis ir atspoguļot Jaunlatgales pilsētas izveidošanu un attīstību, lielāko uzmanību pievēršot pilsētas pārvaldei, iedzīvotājiem un sabiedriskajai dzīvei. Darbā sākotnēji tiek iepazīstināts ar Jaunlatgales vēsturi pirms pilsētas tiesību iegūšanas no 19.gadsimta 2.puses līdz 1933.gadam. Tālāk pētījumā analizēti Jaunlatgales pilsētas iedzīvotāji 1930.gados, pilsētas domes un valdes darbība, kā arī sabiedriskā dzīve. Jaunlatgales pilsētas attīstība tika veicināta mākslīgi, val…
A sustainable city environment through child safety and mobility:A challenge based on ITS?
2012
Our cities should be designed to accommodate everybody, including children. We will not move toward a more sustainable society unless we accept that children are people with transportation needs, and ‘bussing’ them around, or providing parental limousine services at all times, will not lead to sustainability. Rather, we will need to make our cities walkable for children, at least those above a certain age. Safety has two main aspects, traffic safety and personal safety (risk of assault). Besides being safe, children will also need an urban environment with reasonable mobility, where they themselves can reach destinations with reasonable effort; else they will still need to be driven. This p…
Sakrālās arhitektūras pieminekļu saglabāšanas tendences Latgalē no 20. gs.80.gadu beigām līdz mūsdienām
2016
Pētījums aplūko Latgales sakrālās arhitektūras pieminekļu saglabāšanas tendences no 20.gs.80.gadu beigām līdz mūsdienām. Sakrālās arhitektūras saglabāšanas veids ir atkarīgs no sabiedrības izpratnes, zināšanām, iespējām un attieksmes pret to. Latgales sakrālās arhitektūras pieminekļu atbilstošai saglabāšanai ir nepieciešama ciešāka sadarbība starp reliģiskajām organizācijām un kultūras mantojuma speciālistiem.