clicking here. colleagues, clients, or customers by , you can order high-quality copies for your If you wish to distribute this article to others here. following the guidelines can be obtained by Permission to republish or repurpose articles or portions of articles ): April 5, 2012 www.sciencemag.org (this information is current as of The following resources related to this article are availa...

The Polycomb group proteins are transcriptional repressors that are thought to act through multimeric nuclear complexes. We show that ph and Psc coprecipitate with Pc from nuclear extracts. We have analyzed the domains required for the association of Psc with ph and Pc by using the yeast two-hybrid system and an in vitro protein-binding assay. Psc and ph interact through regions of sequence con...

We present a new, simple, and inexpensive sandwichtype double-antibody enzyme immunoassay for alpha,antitrypsin in dried blood collected on the fifth day postpartum. The method is very sensitive, having a detection limit of 2.84 fmol/well. Intraand interassay CVs are 6.1% and 10.3%, respectively, for assay of 5-mm-diameter blood spots eluted into 7 mL of phosphate buffer. Since February 1984, w...

I develop theory about two kinds of individual level integration expertise, portable and local. I discuss the implications of the difference between these kinds of expertise for the management of knowledge in complex integrative processes, and for the development of organizational flexibility. I define portable integration expertise as re-deployable from problem to problem, even though the prob...

Karen McNally (ed.), American Television during a Presidency (Detroit: Wayne State University Press, 2022), pp. 336, ISBN: 9780814349366 (hb), $94.99; ISBN9780814349359 (pb), $36.99; ISBN 9780814349373 (eb), $29.22. 

We propose an approximation to the mean of the ratio of cumulative sums of a sequence of independently distributed nonnegative random variables. Both leading term and higher-order saddlepoint approximations are presented, and the results are applied to a vector ratio approximation, change-point analysis, and kernel regression. The Canadian Journal of Statistics 42: 325–336; 2014 © 2014 Statisti...

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Electrochemical impedance spectroscopy (EIS) has been used to estimate the non-frequency dependent (static) dielectric constants of base polymers such as poly(vinyl chloride) (PVC), cellulose triacetate (CTA) and polystyrene (PS). Polymer inclusion membranes (PIMs) containing different amounts of PVC or CTA, along with the room temperature ionic liquid Aliquat 336 and plasticizers such as trisb...