منابع مشابه
Hadronic W production and the Gottfried sum rule.
The difference in production rate between W and W− at hadron colliders is very sensitive to the the difference between upand down-quark distributions in the proton. This sensitivity allows for a variety of useful measurements. We consider the difference ds(x,Q ) − us(x,Q2) in the sea distributions and the difference ∆u(x,Q2)−∆d(x,Q2) in the polarized parton distribution functions. In both cases...
متن کاملAnomalous Evolution of the Gottfried Sum
We discuss nonperturbative QCD evolution of nonsinglet nucleon structure functions, with particular application to the Gottfried sum. We show that the coupling of the quark partons to bound state mesons leads to nonperturbative contributions to the Altarelli– Parisi equations which, due to the axial anomaly, result in a strong scale dependence of nonsinglet structure functions for values of Q a...
متن کاملJohann Gottfried Herder : Selected Writings on Aesthetics
is published by Princeton University Press and copyrighted, © 2006, by Princeton University Press. All rights reserved. No part of this book may be reproduced in any form by any electronic or mechanical means (including photocopying, recording, or information storage and retrieval) without permission in writing from the publisher, except for reading and browsing via the World Wide Web. Users ar...
متن کاملDiatoms from Brazil: the taxa recorded by Christian Gottfried Ehrenberg
The flora of diatoms from Brazil has been studied by several authors from the beginning of the 19(th) up to now. Some of the old lists and descriptions are unknown or have been ignored by Brazilian researchers and the situation of the names cited was not assessed. Here we compiled a list of 101 taxa of diatoms from Brazil registered by Christian Gottfried Ehrenberg during the 19(th) century. We...
متن کاملThe Beginnings LARS ERNSTER and GOTTFRIED SCHATZ CYTOLOGICAL
Known for over a century, mitochondria have become during the last three decades an important subject of research within several disciplines of experimental biology . For the cytologist, they represented the ideal test objects for applying electron microscopy to the exploration of cellular ultrastructure and for the elaboration of tissue-fractionation techniques with the aim of isolating cytopl...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Der Pathologe
سال: 2010
ISSN: 0172-8113,1432-1963
DOI: 10.1007/s00292-010-1388-9