mangrove sediments were collected during wet and dry seasons from nine stations in khamir,laft and natural reservoir mangrove-dense areas of hormozgan province in the south of iran. σ pcbs ranged from 5.33 to 15.5 ng/g dry weight and the dominant congener was no.153. average σ ddts for khamir and laft mangroves were 16.58 ± 1.51 and 18.8 ± 9.98 ng/g dry weight. ddt was more abundant than dde an...

     The effects of substituents on the symmetry and the nature of halogen bonds in [N∙∙∙X∙∙∙N]+-type systems are presented for the YC5H4N∙∙∙X∙∙∙NC5H5 (Y = NO2, CN, H, CH3, OCH3, OH, NH2, X = Cl, Br, I) complexes. Some structural parameters, energy data and electronic properties were explored with...

It is now well established that many galaxies have nuclear star clusters (NCs) whose total masses correlate with the velocity dispersion σ of the galaxy spheroid in a very similar way to the well–known supermassive black hole (SMBH) M − σ relation. Previous theoretical work suggested that both correlations can be explained by a momentum feedback argument. Observations further show that most kno...

We re-examine the locus of narrow line Seyfert 1 galaxies on theMBH–σ (black hole mass–bulge velocity dispersion) plane in the light of the results from large new optically selected samples. We find that (1) soft X-ray selected NLS1s have a lower ratio of BH mass to σ [OIII] than broad line Seyfert 1 galaxies; this remains a robust statistical result contrary to recent claims otherwise; (2) opt...

Is there a relationship between the mass of a SMBH and the kinetic energy of its host elliptical galaxy? Abstract We use a restricted sample of elliptical galaxies, whose kinematical parameters inside the semimajor axis were calculated correcting the effect of the integration of the light along the line of sight, in order to analyze a possible relationship between the mass of a Supermassive Bla...

We study string theory in the background of a two-dimensional black hole which is described by an SL(2, R)/U(1) coset conformal field theory. We determine the spectrum of this conformal field theory using supersymmetric quantum mechanics and give an explicit form of the vertex operators in terms of the Jacobi functions. We also discuss the applicability of SUSY quantum mechanics techniques to n...

The large (10 2 − 10 5) and strongly temperature dependent resistive anisotropy η = (σ ab /σc) 1/2 of cuprates perhaps holds the key to understanding their normal state in-plane σ ab and out-of-plane σc conductivities. It can be shown that η is determined by the ratio of the phase coherence lengths ℓ i in the respective directions: σ ab /σc = ℓ 2 ab /ℓ 2 c. In layered crystals in which the out-...

We have obtained for the first time K-band infrared spectra of the soft X-ray transient V616 Mon (=A0620–00). We determine the 2-σ upper limit to the fraction of light arising from the accretion disc to be 27 percent. The effect this has on the binary inclination, determined from modelling the infrared ellipsoidal variations is to increase it by less than 7 degrees and decrease the mass of the ...