Zobrazeno 1 - 10
of 882
pro vyhledávání: '"V. Ramkumar"'
Publikováno v:
ICTACT Journal on Communication Technology, Vol 6, Iss 2, Pp 1105-1111 (2015)
One of the major drawbacks of microstrip patch antenna is its narrow bandwidth. The solution of this problem is to use aperture coupled stacked micro strip patch antenna. The antenna uses a combination of aperture coupled feeding technique and multi-
Externí odkaz:
https://doaj.org/article/3b8bdf08d3d446c9a9807f6aa9774949
Autor:
V. Ramkumar, K. Kannan, C. Moorthy, R. Hariharakrishnan, R. Sampathkumar, R. Arun, A. Aravind, N. Vishwanathan, Gopalakrishnan
Publikováno v:
Indian Heart Journal, Vol 69, Iss S2, p S7 (2017)
Externí odkaz:
https://doaj.org/article/0f376e57083645a5809170f6a755838a
Publikováno v:
IUCrData, Vol 2, Iss 4, p x170581 (2017)
In the title compound, C33H27NO2, the pyrrolidine ring adopts an envelope conformation, with the N atom as the flap. The cyclopentanone ring adopts a twisted conformation about the Cs—CH2 bond (s = spiro link). The dihedral angle between these ring
Externí odkaz:
https://doaj.org/article/65a1f65f9e1d4f5fb6aab5428f23f227
Publikováno v:
Acta Crystallographica Section E, Vol 70, Iss 11, Pp o1161-o1162 (2014)
The title compound, C25H29Cl2NO, which is a chloro analog of 2,4-bis(2-bromophenyl)-7-(tert-pentyl)-3-azabicyclo[3.3.1]nonan-9-one [Park, Ramkumar & Parthiban (2012). Acta Cryst. E68, o2946], exists in a twin-chair conformation with an equatorial ori
Externí odkaz:
https://doaj.org/article/d8bf8aadc7cb479aab78d4539ccf0656
Publikováno v:
Acta Crystallographica Section E, Vol 70, Iss 11, Pp o1160-o1160 (2014)
In the title molecule, C23H29NO5, the central piperidine ring has a chair conformation. The planes of the two benzene rings are inclined each to other at 61.7 (1)°. The crystal packing exhibits no directional interactions only van der Waals contacts
Externí odkaz:
https://doaj.org/article/f2fca6a27f114f5b9ec0821cd581be69
Publikováno v:
Acta Crystallographica Section E, Vol 70, Iss 5, Pp o541-o542 (2014)
In the title compound, C30H31N3O2S, the fused pyrrolidine ring bearing three substituents adopts an envelope conformation with the C atom bearing the benzoyl group as the flap. The other fused pyrrolidine ring adopts a twisted conformation about one
Externí odkaz:
https://doaj.org/article/1a356eca7e5a45da9be2a9fbae98264d
Publikováno v:
Acta Crystallographica Section E, Vol 69, Iss 12, Pp o1848-o1848 (2013)
In the title molecular salt, C16H10NO+·I−, the dihedral angle between the pyridinium and benzene rings is 6.61 (8)°. In the crystal, the cation is linked to the anion by a C—H...I interaction arising from the activated aromatic C atom adjacent
Externí odkaz:
https://doaj.org/article/db90c7f53a7a4e73abd9c22851188c56
Publikováno v:
Acta Crystallographica Section E, Vol 69, Iss 10, Pp m542-m543 (2013)
In the title compound, [Cu2(C19H31N4O)(OH)(NCS)2], the molecular structure of the dinuclear complex reveals two pentacoordinated CuII ions, which are bridged by the phenolate O atom of the ligand and by an exogenous hydroxide ion. The bridging atoms
Externí odkaz:
https://doaj.org/article/b3f63217b3564d669c840a88f0aec131
Publikováno v:
Acta Crystallographica Section E, Vol 69, Iss 10, Pp o1593-o1593 (2013)
The title compound, C22H26N2O2, crystallizes with three independent molecules, two of which are situated on inversion centers, so the asymmetric unit contains two independent half-molecules and one molecule in a general position. The two hydroxy grou
Externí odkaz:
https://doaj.org/article/bee6f370ba7a4d41bb855ad672826262
Publikováno v:
Acta Crystallographica Section E, Vol 69, Iss 9, Pp o1411-o1412 (2013)
There are two independent molecules in the asymmetric unit of the title compound, C19H16N2O5S, in which the thiazole rings make dihedral angles of 80.89 (11) and 84.81 (11)° with the pyrano[3,2-c]chromene ring systems. An intramolecular N—H...O hy
Externí odkaz:
https://doaj.org/article/4448eacf6c4243cda23d7a051812f249