Hasil untuk "q-bio.SC"

R. E. Beyer

M. El-shahed, H. Hassan

S. Kilmer, R. Anderson

M. Chaichian, P. Kulish, J. Lukierski

Taekyun Kim

The purpose of this paper is to present a systematic study of some families of multiple q-Genocchi and Euler numbers by using the multivariate q-Volkenborn integral (= p-adic q-integral) on ℤp. The investigation of these q-Genocchi numbers and polynomials of higher order leads to interesting identities related to these objects. The results of the present paper cover earlier results concerning ordinary q-Genocchi numbers and polynomials.

T. Kajava, A. Gaeta

D. Goldberg, J. Whitworth

D. Thomas, L. Baas

Research employing Q technique and its attendant methodology has long encountered criticism targeted on the allegedly specious, "non-generalizable" nature of such findings. Drawn typically from small-sample investigations of human subjectivity, wherein respondents supply data through Q sorts composed of items of unknown reliability, findings of Q studies are considered by many to fall far short of the minimal criteria for scientific measurement. Issues of generalization in Q methodology, it is argued, are amenable to examination in terms of the notion of "reliable schematics." Findings from two pairs of "tandem-study" explorations bear strong witness to the schematically reliable character of Q-study results produced from differing probes of the same subjective phenomenon. Viewed against this backdrop, the frequently voiced concerns over reliability issues stemming from the use of Q would appear quite exaggerated if not altogether unfounded.

M. Risha, M. Annaby, M. Ismail et al.

F. Buhariwalla, B. Cann, Thomas J. Marrie

A. Kotov, T. Strobl

A Q-manifold is a graded manifold endowed with a vector field of degree 1 squaring to zero. We consider the notion of a Q-bundle, that is, a fiber bundle in the category of Q-manifolds. To each homotopy class of "gauge fields" (sections in the category of graded manifolds) and each cohomology class of a certain subcomplex of forms on the fiber we associate a cohomology class on the base. As any principal bundle yields canonically a Q-bundle, this construction generalizes Chern–Weil classes. Novel examples include cohomology classes that are locally de Rham differential of the integrands of topological sigma models obtained by the AKSZ-formalism in arbitrary dimensions. For Hamiltonian Poisson fibrations one obtains a characteristic 3-class in this manner. We also relate the framework to equivariant cohomology and Lecomte's characteristic classes of exact sequences of Lie algebras.

A. Kusenko, V. Kuzmin, M. Shaposhnikov et al.

Theories with low-energy supersymmetry predict the existence of stable nontopological solitons, $Q\ensuremath{-}\mathrm{balls}$, that can contribute to dark matter. We discuss the experimental signatures, methods of detection, and the present limits on such dark-matter candidates.

A. Milazzo, Robert Hall, Paul A. Storm et al.

T. Do, Adam Y. Hsu, T. Jonassen et al.

Ubiquinone (coenzyme Q or Q) is an essential component of the mitochondrial respiratory chain in eukaryotic cells. There are eight complementation groups of Q-deficientSaccharomyces cerevisiae mutants designatedcoq1-coq8. Here we report that COQ8 isABC1 (for Activity of bc 1 complex), which was originally isolated as a multicopy suppressor of a cytochrome bmRNA translation defect (Bousquet, I., Dujardin, G., and Slonimski, P. P. (1991) EMBO J. 10, 2023–2031). Previous studies of abc1 mutants suggested that the mitochondrial respiratory complexes were thermosensitive and function inefficiently. Although initial characterization of the abc1 mutants revealed characteristics of Q-deficient mutants, levels of Q were reported to be similar to wild type. The suggested function of Abc1p was that it acts as a chaperone-like protein essential for the proper conformation and functioning of the bc 1 and its neighboring complexes (Brasseur, G., Tron, P., Dujardin, G., Slonimski, P. P. (1997) Eur. J. Biochem. 246, 103–111). Studies presented here indicate that abc1/coq8 null mutants are defective in Q biosynthesis and accumulate 3-hexaprenyl-4-hydroxybenzoic acid as the predominant intermediate. As observed in other yeast coq mutants, supplementation of growth media with Q6 rescues theabc1/coq8 null mutants for growth on nonfermentable carbon sources. Such supplementation also partially restores succinate-cytochrome c reductase activity in theabc1/coq8 null mutants. Abc1/Coq8p localizes to the mitochondria, and is proteolytically processed upon import. The findings presented here indicate that the previously reported thermosensitivity of the respiratory complexes of abc1/coq8mutants results from the lack of Q and a general deficiency in respiration, rather than a specific phenotype due to dysfunction of the Abc1 polypeptide. These results indicate that ABC1/COQ8 is essential for Q-biosynthesis and that the critical defect ofabc1/coq8 mutants is a lack of Q.

L. Herrington, C. Nester

R. Sandberg, K. Mølhave, A. Boisen et al.

W. Geyi

H. Oruç, G. Phillips

Rafael Díaz, Carolina Teruel

Abstract We introduce the q,k-generalized Pochhammer symbol. We construct Γ q,k and B q,k , the q,k-generalized gamma and beta functions, and show that they satisfy properties that generalize those satisfied by the classical gamma and beta functions. Moreover, we provide integral representations for Γ q,k and B q,k .

M. N. Ahmadabadi, M. Asadpour