Extracellular calcium transients were monitored with 2 mM tetramethylmurexide at low calcium (250 microM total, 130 microM free), and action potentials were monitored together with developed tension at normal calcium (1.3 mM) during the production and decay of post-stimulatory potentiation in rabbit left atrial strips. At normal calcium, the contractile potentiation produced by a brief burst of...

We present an optical/near-IR survey of 11 variable young stars (EXors and EXor candidates) aimed at deriving monitoring their accretion properties. About 30 optical near-infrared spectra ($\Re$ $\sim$ 1500-2000) were collected between 2014-2019 with the Large Binocular Telescope (LBT). From spectral analysis we have derived luminosity mass rate, visual extinction, temperature density permitted...

In this paper, the preferred region of design parameters for quasi-normalized equations of single-axis attitude control of rigid spacecraft using pulse-width pulse-frequency modulator (PWPFM) is presented for rest-to-rest maneuvers. Using the quasi-normalized equations for attitude control reduces the system parameters, that is, the moment of inertia, the filter gain, and the maximum torque of ...

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 ): February 2, 2012 www.sciencemag.org (this infomation is current as of The following resources related to this article are avai...

RXTE made 5 X-ray observations of the magnetic accretor GK Per during its 1996 outburst, recording a count rate of ten times the quiescent level. The 351-s spin pulse shows a deep, nearly sinusoidal modulation, in contrast to the weaker, double-humped profile of quiescence. The spectrum shows absorption increased by two orders of magnitude over quiescence. We explain these differences in terms ...

The sources of the May 1202 and November 1759, M 7.5 Near East earthquakes remain controversial, because their macroseismal areas coincide, straddling subparallel active faults in the Lebanese restraining bend. Paleoseismic trenching in the Yammoûneh basin yields unambiguous evidence both for slip on the Yammoûneh fault in the twelfth–thirteenth centuries and for the lack of a posterior event. ...

We report on Chandra ACIS-S observations of five type I X-ray bursters with low persistent emission: We designate candidate persistent sources for four X-ray bursters. All candidates are detected at a persistent luminosity level of 10 32−33 erg s −1 , comparable to soft X-ray transients in quiescence. From the number of bursters with low persistent emission detected so far with the Wide Field C...

In this issue of Molecular Cell, De Virgilio and colleagues (Talarek et al., 2010) identify the Igo1/2 proteins as factors that protect mRNAs from degradation during quiescence.