In this issue of Cell, a study by Valerie Mizrahi and her colleagues (Boshoff et al., 2003) suggests that a putative error-prone DNA polymerase encoded by the dnaE2 gene of Mycobacterium tuberculosis may bypass certain types of DNA bas...

A new form of perturbation theory is proposed. It is based on the so-called Hill-determinant method, and its main idea lies in taking the related particular, exactly known bound states as zero-order approximants. In detail, a few relate...

We propose a simple and flexible authentication scheme applicable for use with both binary and nonbinary messages and we show that, among the set of all possible messages of assigned length, all possible signatures occur with equal prob...

The paper investigates the effects of intra-family talent transmission when human capital exhibits indivisibilities and parental financing of education involves borrowing constraints. Positive talent correlation reduces social mobility ...

Motions of the Eckart frame, as defined in terms of the Eckart vector by Louck and Galbraith (4), are calculated for molecules belonging to several point groups. Differential changes in the associated Gram matrix are treated as perturba...

The effect of traces of hydrogen sulphide and of sulphur dioxide on the oxidation of methane over supported precious metals has been examined. Both gases inhibited catalytic oxidation over Pd and Rh, apparently as a result of sulphate f...

The prediction of faults on high voltage transmission lines requires the detection of incipient faults, which is implemented by detection of the radio noise due to contaminated insulators, insulation deterioration, and improper connecti...

By postulating that the non-hydrostatic features of the Earth's gravitational potential are due to harmonic undulations of a nearly spherical internal surface with a density contrast, and that the stresses arising at this surface are of...

Eighty-three mother–infant dyads participated in this study. Positive affect (PA) broadly, along with fine-grained aspects of PA, was measured at 10 months of age. Language was measured at 14 months. Infant PA predicted expressive, bu...

The lateral open forehead lift technique uses 2 scalp incisions to elevate and suspend the lateral eyebrows, and 2 upper blepharoplasty incisions to access the muscles that produce glabellar frown lines and depress the medial eyebrows. ...

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