POLARITY RULES IN COMPUTER DESIGN OF HETEROCYCLES E.V. Babaev Chemical Dept, Moscow State University, Moscow 119899, Russia Abstrac t Qualitative polarity rules for heterocyclic ring synthesis via polar reactions of cyclization or recyclization are discussed. The main idea is the application of general definition of consonant and dissonant structures to acyclic chains and cyclic heteroaromatics and analysis of interconversion of this two combinatorial properties. ...

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Welcome to Fourmilab 's calendar converter! ... In the Julian calendar every fourth year is a leap year in which February has 29, not 28 days, but in the Gregorian, years divisible by 100 are not leap years unless they are also divisible by 400. ... The average length of a year is 365.2468 days compared to the actual solar tropical year (time from equinox to equinox) of 365.24219 days, so the calendar accumulates one day of error with respect to the solar year every 216 years. ... Excel serial day: . ...

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... Professional experience . ... Department of Geology. Chair of Dynamic Geology. ... Laboratory of Geodynamic Processes Modeling. ... 2001 Elaboration (together with V.Vadkovsky ) electronic version of textbook on course "Dynamic Processes in Geology" for students of 5th course and postgraduate students (MSU. ... 2000 - Delivering lectures and performing exercises with students on the course "Computer Simulation Of Geodynamic Processes" for students of 3rd course (MSU. ... Page design: ©V.Zakharov . ...

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Chapter 2 Unitary symmetry and quarks 2.1.1 Baryon and meson unitary multiplets 2.1 Eightfold way. ... 2.1.2 Mass formulae for octet of pseudoscalar mesons As it is known, mass term in the Lagrangian for the pseudoscalar meson eld described by the wave function r has the form quadratic in mass (to assure that Lagrange-Euler equation for the free point-like meson would yield Gordon equation where meson mass enters quadratically) LP = m2 P m P 2 and for octet of such ...

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... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. February 7, 1998 . COBE Hotspots: The Oldest Structures Known . ... After computer processing to remove contributions from nearby objects and the effects of the earth's motion , the map shows temperature variations in the early Universe as red "spots". These spots are the oldest, most distant structures known. ... About APOD > . ...

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ERC Rules1 for the submission of proposals and the related evaluation, selection and award procedures for indirect actions under the Ideas Specific Programme of the Seventh Framework Programme (2007-2013) 1 Consolidated text based on Commission Decision C(2007)2286 of 6 June 2007 as amended by the Commission Decision C(2007)4429 of 27 September 2007. ... Panels of experts and expert referees for the peer review evaluation of frontier research proposals will be selected by the ERC Scientific Council. ...

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Geometric phase around exceptional p oints Alexei A. Mailybaev, Oleg N. Kirillov, and Alexander P. Seyranian Institute of Mechanics, Moscow State Lomonosov University Michurinskii pr. ... We develop a general multidimensional theory of the geometric phase for (double) cycles around exceptional degeneracies in non-Hermitian Hamiltonians. ... For nonsymmetric non-Hermitian Hamiltonians of higher dimension, the geometric phase tends to for small cycles and changes as the cycle size and shape are varied. ...

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