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اثر تجمعی بین نیروهای بین مولکولی از پدیده های مهم در شیمی برهمکنش های غیر کووالانسی است. غالباً این اثر باعث تغییر زیادی در خواص هندسی، اسپکتروسکوپی و انرژی مولکول های برهمکنش کننده می شود. اثر تجمعی برای کمپلکس های با پیوند هیدروژنی بسیار مورد بررسی قرار گرفته است؛ لذا در این تحقیق ما به بررسی اثر تجمعی در پیوند هیدروژنی و هالوژنی پرداختیم. بدین منظور محاسبات آغازین روی شش دی هالید (به شکل کلی...
Outbred XY(Sry-) female mice that lack Sry due to the 11 kb deletion Sry(dl1Rlb) have very limited fertility. However, five lines of outbred XY(d) females with Y chromosome deletions Y(Del(Y)1Ct)-Y(Del(Y)5Ct) that deplete the Rbmy gene cluster and repress Sry transcription were found to be of good fertility. Here we tested our expectation that the difference in fertility between XO, XY(d-1) and...
This study analyses the relationship between different components of retailer’s brand equity, as well influence that use Internet has on formation equity. As some authors point out, there is a need for measure equity (Boo et al., 2008, Tourism Management, Vol. 30, pp. 219–231; Lee & Back, 2010, 31, 395–401). The model proposed to analyse based one used by Boo al. (2008, 219–231), who, in tu...
We discuss the interpretation of distortions to stellar spectral lines with particular attention to line bisectors in the presence of an orbiting planetary companion. We present a simple model whereby light reflected by the companion can cause temporal variations to the observed line profiles. These distortions have a characteristic signature depending on the inclination angle of the system. Fo...
The photometric U orbital variations of the symbiotic binary AG Dra, caused by occultation of a bright gaseous region by the K giant in this system, are used to derive the emission from the circumbinary nebula, that is supposed to be generated by the cool giant’s wind. Assuming spherical symmetry and constant expansion velocity for the wind, and that the giant has the same intrinsic continuum e...
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