ZfN: Search Results

1	Author	Halil Oturak, Adnan Sağlam, Semiha Bahçeli	Requires cookie*
	Title	/-Modulation in ID NMR l H Spectrum of Taurine and Aspartate Using Spin-Echo Technique
	Abstract	This study reports on a theoretical calculation of Hahn's spin-echo experiment in case of a model A 2 Bt spin system with a strongly coupling character and gives the experimental results of one-dimen-sion n H high-resolution NMR spectra of taurine and aspartate. The calculated amplitudes of the spin-echoes for two different proton groups of taurine are given. Using results of our calculations for tau-rine, the computer simulations of /-modulation are implemented. It is shown that the agreement be-tween the experimental and simulated spectra is good.
	Reference	Z. Naturforsch. 54a, 305—310 (1999); received February 24 1999
	Published	1999
	Keywords	NMR, Amino Acids, A 2 B 2 System, /-modulation
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	TEI-XML for	default:Reihe_A/54/ZNA-1999-54a-0305.pdf
	Identifier	ZNA-1999-54a-0305
	Volume	54

2	Author	P. K. Bhatia, B. S. Bhadauria	Requires cookie*
	Title	Effect of Low-Frequency Modulation on Thermal Convection Instability
	Abstract	The stability of a horizontal layer of fluid heated from below is examined when, in addition to a steady temperature difference between the horizontal walls of the layer a time-dependent low-frequency per turbation is applied to the wall temperatures. An asymptotic solution is obtained which describes the be haviour of infinitesimal disturbances to this configuration. Possible stability criteria are analyzed and the results are compared with the known experimental as well as numerical results.
	Reference	Z. Naturforsch. 56a, 509 (2001); received February 26 2001
	Published	2001
	Keywords	Thermal Convection, Modulation, Rayleigh Number, Instability
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	TEI-XML for	default:Reihe_A/56/ZNA-2001-56a-0509.pdf
	Identifier	ZNA-2001-56a-0509
	Volume	56