نتایج جستجو برای: دهه 30
تعداد نتایج: 532777 فیلتر نتایج به سال:
UNLABELLED BACKGROUND Understanding the mechanical properties of chromatin is an essential step towards deciphering the physical rules of gene regulation. In the past ten years, many single molecule experiments have been carried out, and high resolution measurements of the chromatin fiber stiffness are now available. Simulations have been used in order to link those measurements with structu...
Globally, echovirus 30 (E30) is one of the most frequently identified enteroviruses and a major cause of meningitis. Despite its wide distribution, little is known about its transmission networks or the dynamics of its recombination and geographical spread. To address this, we have conducted an extensive molecular epidemiology and evolutionary study of E30 isolates collected over 8 years from a...
این تحقیق سعی در مطالعه ی مناظر دو دهه ی 30 و 50 ادن و یافتن تفاوت های اساسی آن دو دارد. این دو دهه به عنوان دهه های مادی و معنوی زندگی شاعر شناخته می شوند زیراکه گرایش های سیاسی و چپ گرایانه ی شاعر و نا امیدی او از بنیان های مذهبی در دهه ی 30 او را به سمت مارکس سوق می دهد در حالی که زندگی معنوی او با بازگشتش به مسیحیت در دهه ی 40 آغاز شده و تا واپسین سال های عمرش ادامه می یابد. شعر سال های معن...
(version compiled August 25, 2007) John Baez, Aristide Baratin, Laurent Freidel, Derek Wise 1 Department of Mathematics, University of California Riverside, CA 92521, USA 2 Laboratoire de Physique, École Normale Supérieure de Lyon 46 allée d’Italie, 69364 Lyon Cedex 07, France. 3 Perimeter Institute for Theoretical Physics 35 King Street N, Waterloo ON, N2J 2W9, Canada. 4 Department of Mathemat...
On May 11, 2008 the German biophysicist Professor Fritz-Albert Popp will celebrate his 70th birthday. This is a welcome occasion to pay tribute to the scientific achievements and human qualities of a scientist whose merits as one of the founders of biophotonics and as a pioneer of quantum biophysics increasingly find appreciation internationally.
We determine paleoelevation of the Sierra Nevada, California, by tracking the effect of topography on precipitation, as recorded in hydrogen isotopes of kaolinite exposed in gold-bearing river deposits from the Eocene Yuba River. The data, compared with the modern isotopic composition of precipitation, show that about 40 to 50 million years ago the Sierra Nevada stood tall (>/=2200 meters), a r...
Architectural proteins mediate interactions between distant sequences in the genome. Two well-characterized functions of architectural protein interactions include the tethering of enhancers to promoters and bringing together Polycomb-containing sites to facilitate silencing. The nature of which sequences interact genome-wide appears to be determined by the orientation of the architectural prot...
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