12,058 research outputs found

    ORGANIC FOOD ADOPTION DECISIONS BY NEW MEXICO GROCERIES

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    Sales for organically grown foods, particularly organic fresh produce are increasing. This study focuses on the characteristics of grocery stores in New Mexico who sell or intend to sell organic foods. The results suggest most grocery stores do not carry organic foods because of the low availability and perceived consumer demand. However, stores that sell organic foods reported consumer demand prompted them to carry organic foods. The results can provide information for grocery stores to further understand problems and benefits associated with adopting organic foods.Agribusiness,

    Precision Electroweak Tests at LEP

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    A presentation is given of a selection of the electroweak precision test that have been carried out at LEP. Measurements of the Z0Z^0 lineshape and asymmetries from the LEP1 era as well as measurements of the WW mass from LEP2 are described, and up-to-date results presented. A brief overview is given of some experimental aspects that are crucial to the precision tests. Radiative corrections and some of the constraints that they impose on the Standard Model are discussed

    Second Order Power Corrections in the Heavy Quark Effective Theory I. Formalism and Meson Form Factors

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    In the heavy quark effective theory, hadronic matrix elements of currents between two hadrons containing a heavy quark are expanded in inverse powers of the heavy quark masses, with coefficients that are functions of the kinematic variable vvv\cdot v'. For the ground state pseudoscalar and vector mesons, this expansion is constructed at order 1/mQ21/m_Q^2. A minimal set of universal form factors is defined in terms of matrix elements of higher dimension operators in the effective theory. The zero recoil normalization conditions following from vector current conservation are derived. Several phenomenological applications of the general results are discussed in detail. It is argued that at zero recoil the semileptonic decay rates for BDνB\to D\,\ell\,\nu and BDνB\to D^*\ell\,\nu receive only small second order corrections, which are unlikely to exceed the level of a few percent. This supports the usefulness of the heavy quark expansion for a reliable determination of VcbV_{cb}.Comment: (34 pages, REVTEX, two postscript figures available upon request), SLAC-PUB-589

    Nuclear magnetic resonance spectroscopy of porphyrins and metalloporphyrins

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    More on Symmetries in Heavy Quark Effective Theory

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    We present a general classification of all normal and ``chiral" symmetries of heavy quark effective theories. Some peculiarities and conondrums associated with the ``chiral" symmetries are discussed.Comment: 15 pages, preprint UR-1320, ER40685-77

    Science and Engineering Manpower: Needs for the 70\u27s; Implications for Higher Education

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    Address at the annual meeting of the Minnesota Academy of Science at Winona State College, Winona, Minn., May 5, 1971
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