2,404 research outputs found
Effect of Puromycin on Mitotic Index, Amino Acid Incorporation and Dna Synthesis of Epidermal Cells
Puromycin 200 mg/kg given systemically will block DNA synthesis, amino acid incorporation and mitosis in the epidermis of the baby rat. Topically applied solutions of 1% puromycin did not have any effect on uptake of H3 thymidine or on mitosis of the epidermal cells. H3-puromycin given intraperitoneally was demonstrated in the epidermal cells by radioautographs but no evidence of labeling of epidermal cells was found by topical application
A Non-Standard String Embedding of E8
An algorithm to systematically and efficiently generate free fermionic
heterotic string models was recently introduced. This algorithm has been
adopted by the Free Fermionic Model Construction (FFMC) program at Baylor
University. As its first application, the algorithm is being applied to
systematically generate the complete set of free fermionic heterotic string
models with untwisted left-moving (worldsheet supersymmetric) sectors, up to
continually advancing Layer and Order. Statistical analysis of this study will
be reported in the near future. However, in a series of separate notes we will
be reporting some of the more interesting models that appear along the way. In
this, our first such note, we reveal a different string embedding of E8 than is
standard. That is, rather than realize E8 via an SO(16) embedding, 248 = 120 +
128, we realize it via an SU(9) embedding, 248 = 80 + 84 + 84-bar. This is
obtained in a Layer 1, Order 6 model for which modular invariance itself
dictates a gravitino sector accompany the gauge sector.Comment: Standard Latex, 7 page
Structure formation by cosmic strings with a cosmological constant
Final published version.Comment: 4 Page
Regularity properties of optimal controls for problems with time-varying state and control constraints
Accepted versio
High Mass Triple Systems: The Classical Cepheid Y Car
We have obtained an HST STIS ultraviolet high dispersion Echelle mode
spectrum the binary companion of the double mode classical Cepheid Y Car. The
velocity measured for the hot companion from this spectrum is very different
from reasonable predictions for binary motion, implying that the companion is
itself a short period binary. The measured velocity changed by 7 km/ s during
the 4 days between two segments of the observation confirming this
interpretation. We summarize "binary" Cepheids which are in fact members of
triple system and find at least 44% are triples. The summary of information on
Cepheids with orbits makes it likely that the fraction is under-estimated.Comment: accepted by A
Dealing with mobility: Understanding access anytime, anywhere
The rapid and accelerating move towards the adoption and use of mobile technologies has increasingly provided people and organisations with the ability to work away from the office and on the move. The new ways of working afforded by these technologies are often characterised in terms of access to information and people ‘anytime, anywhere’. This paper presents a study of mobile workers that highlights different facets of access to remote people and information, and different facets of anytime, anywhere. Four key factors in mobile work are identified from the study: the role of planning, working in ‘dead time’, accessing remote technological and informational resources, and monitoring the activities of remote colleagues. By reflecting on these issues, we can better understand the role of technology and artefact use in mobile work and identify the opportunities for the development of appropriate technological solutions to support mobile workers
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