Browsing Araştırma Çıktıları by Publisher "ACADEMIC PRESS LTD"
Now showing items 1-12 of 12
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An alternative method for the exact calculation of Wannier-Stark localization in superlattices
(ACADEMIC PRESS LTD, 2001)We present an alternative method for the exact calculations of the Wannier-Stark (WS) localization in a long periodic potential corresponding to a (50 Angstrom /30 Angstrom) GaAs/Ga0.7Al0.3As superlattice. We show that the ... -
Binding energies of excitons in symmetric and asymmetric quantum wells in a magnetic field
(ACADEMIC PRESS LTD, 1998)The binding energy of the exciton in the symmetric and asymmetric GaAs/Ga1-xAlxAs quantum wells is calculated with the use of a variational approach. Results have been obtained as a function of the potential symmetry, and ... -
Changes in the nitric oxide system of rat myometrium during midgestation and delivery at term
(ACADEMIC PRESS LTD, 1998)The aims of this study were to investigate whether a nitric oxide (NO) system is present in the pregnant rat myometrium and whether it differentially inhibits myometrial contractility during midgestation and delivery at ... -
Double quantum well electronic energy spectrum within a tilted magnetic field
(ACADEMIC PRESS LTD, 1999)The analytical solutions of the Schrodinger equation for a double quantum well structure (DQWS) subjected to an externally applied tilted magnetic field are obtained and the results are discussed. The dependency of the ... -
Effect of additional testosterone on purinergic responses in isolated rabbit corpus cavernosum strips
(ACADEMIC PRESS LTD, 1998)Recently, it has been demonstrated that the endothelium of corpus cavernosum (CC) plays an important role on smooth muscle relaxation, which is crucial to initiate and maintain erection. We investigated the effect of ... -
The electronic structure of a quantum well under an applied electric field
(ACADEMIC PRESS LTD, 1996)The effects of an applied electric field on quantum well subband energies are calculated variationally within the effective mass approximation for model potential profiles. The concept of a quasi-bound state is examined ... -
Electronic subband of single Si delta-doped GaAs structures
(ACADEMIC PRESS LTD, 2000)We have theoretically investigated the subband structure of single Si delta-doped GaAs inserted into a quantum well at T = 0 K. We will discuss the influence of the delta-doping concentration, the delta-layer thickness and ... -
Improvement in intersubband optical absorption and the effects of device parameter variations in quantum wells with an applied electric field
(ACADEMIC PRESS LTD, 1999)The intersubband optical absorption in symmetric and asymmetric, single and coupled, double GaAs/Ga1-xAlxAs quantum wells is calculated. The results have been obtained in the presence of a uniform electric field as a ... -
Intersubband optical absorption in a quantum well under a tilted magnetic field
(ACADEMIC PRESS LTD, 2001)By using an appropriate coordinate transform we have calculated the intersubband optical absorption in the single square well under a tilted magnetic field. In this study the dependence of the intersubband transitions on ... -
Manganese and zinc in the ovipositors and mandibles of hymenopterous insects
(ACADEMIC PRESS LTD, 1998)X-ray microanalysis of the ovipositor and mandibles of various hymenopterous insects has revealed the presence in many species of up to 10% wt/wt of either zinc or manganese in the cuticle. These metals appear to be involved ... -
Paraphyletic taxa and taxonomic chaining: evaluating the classification of braconine wasps (Hymenoptera : Braconidae) using 28S D2-3 rDNA sequences and morphological characters
(ACADEMIC PRESS LTD, 2001)The parasitoid wasp subfamily Braconinae is dominated by the type genus Bracon, a genus which probably now contains more than 1000 described species and no reliable subgeneric groupings. By analysing 288 D2-3 rDNA sequences ... -
Subband structure and excitonic binding of graded GaAs/Ga1-xAlxAs quantum wells under an electric field
(ACADEMIC PRESS LTD, 1998)The effects of an applied electric field on subband energies and excitonic binding for a graded GaAlAs quantum well are calculated variationally within the effective mass approximation. The very sensitive dependence of ...
