TO THE EDITOR: We write you regarding an article named " Isolation and characterization of cholangiocyte primary cilia, " published by Huang et al. in September of 2006 (1). The Introduction of this article ends with the following sentences: " Despite these findings, our understanding of the functions of the primary cilium and its role in responding to environmental stimuli are still poorly und...

Rayleigh optical depth values obtained from various computations, tabulations, and parameterizations are not always in good agreement. Important differences as large as 3 or 4% can arise depending on the choice of depolarization factor, the formula used for the refractive index of air, and the choice of standard values for columnar and molecular number densities. The fitting equations generally...

The popular Hirsch index is used as a criterion for evaluating the achievements of scientists, departments, universities, and countries. Unfortunately, this index is often unfair in view of various scientific disciplines, can easily be manipulated, so its usefulness is undermined by unfair competition. To address these problems, this paper introduces a set of new popularity indices which evalua...

A total of 1110 broiler cockerels were used in three experiments to determine the availability of iron and copper from various sources. A skim milk basal diet was fed in each experiment using chicks maintained in battery brooders beginning at one day of age. Four organic iron compounds (sequestered iron A' and ferric choline chloride in Experiment 1 and sequestered iron B and C in Experiment 2)...

The statements of Andrew Taylor Still, MD, DO, abound within the osteopathic literature. However, Still is sometimes misquoted, and corresponding references to his quotations are occasionally incomplete or inaccurate. There are several reasons why these errors continue to occur, including confusion surrounding the copyright dates and multiple editions of his books. In addition, less reliable, s...

of the cited reference. They have a similar topic about evolutionary model and mrbayes. Topic 2, topic 3, and topic 5 had less relationship with the abstract of cited reference. The comparison of topics in citing abstract and citing sentences. The similarity matrix of topics in citing abstracts and citing sentences are shown in Table 5 and Table 6. The topics in citing abstracts have an average...

Recently we proposed a model in which when a scientist writes a manuscript, he picks up several random papers, cites them and also copies a fraction of their references (cond-mat/0305150). The model was stimulated by our discovery that a majority of scientific citations are copied from the lists of references used in other papers (cond-mat/0212043). It accounted quantitatively for several prope...