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Recently, evidence was reported for the belief that a carcinogenic agent, †̃20-methyleholanthrene, could be secreted into the milk of a lactating ani mal and thereby gain entrance into the bodies of the offspring to cause an abnormally high mci dence of neoplasms (1). Further positive evidence for this mode of excretion of methyleholanthrene has now been obtained by means of ultraviolet ab sor...

The Chow ring of a smooth algebraic variety V , denoted CH∗(V ), is an analogue of the cohomology ring that is more closely related to the algebraic, rather than topological, aspects of the variety. For a d-dimensional abelian variety A over a field k, let  = Pic(A) be its dual, the variety parameterising principal line bundles on A, and for a ∈  denote the line bundle parameterised by a as L...

/V-Nitniso-.V-methyhirea (NMU) is an effective carcinogen for the induction of mammary carcinoma in the rat. Tamoxifen (TAM), used as a chemopreventive agent to reduce tumor incidence, has been well studied using this model. We have utilized the rat mammary carcinoma model to assess the effect of TAM on preneoplastic changes. Fifty-day-old virgin female Sprague-Dawley rats were randomized by we...

Lactococcus lactis â-phosphoglucomutase (â-PGM) catalyzes the interconversion of â-D-glucose 1-phosphate (â-G1P) and â-D-glucose 6-phosphate (G6P), forming â-D-glucose 1,6-(bis)phosphate (âG16P) as an intermediate. â-PGM conserves the core domain catalytic scaffold of the phosphatase branch of the HAD (haloalkanoic acid dehalogenase) enzyme superfamily, yet it has evolved to function as a mutas...

Aims—To assess immunohistochemically whether the neural cell adhesion molecule L1, which is a member of the immunoglobulin superfamily and has been shown recently to be a stimulating factor for glioma migration, is expressed in glioma tissues, and to investigate factors that can regulate this expression. Methods—Twenty seven glioma tissue specimens including 13 glioblastomas, seven anaplastic a...

Îïèñàíà å ñèñòåìà îò ãàçîâè äåòåêòîðè íà åëåìåíòàðíè ÷àñòèöè, íàðè÷àíè êàìåðè ñúñ ñúïðîòèâèòåëíè ïëîñêîñòè (RPC), èçïîëçâàíè çà èäåíòèôèêàöèÿ íà çàðåäåíè ëåïòîíè è àäðîíè ïî âðåìåòî èì íà ïðåëèòàíå. Òå ñà ÷àñò îò åêñïåðèìåíòà HARP â Åâðîïåéñêèÿ öåíòúð çà ÿäðåíè èçñëåäâàíèÿ CERN â Æåíåâà, Øâåéöàðèÿ.  òàçè ðàáîòà ñà äàäåíè ãåîìåòðèÿòà íà êàìåðèòå è òåõíèòå öåëè.  äåòàéëè ñà îïèñàíè õàðàêòåðèñòè...

Mathematical Biology Monday, September 14, 2015, 12:00pm-1:00pm 335 West Hall Bard Ermentrout (University of Pittsburgh) Keeping the beat: Homeostatic frequency control in coupled oscillators When nonlinear oscillators are forced or coupled they will generally lock if the frequency is in a narrow enough range. However, humans and other animals such as fireflies and Snowball the dancing cockatoo...