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Journal articles on the topic 'Degeneracy locus'

Author: Grafiati
Published: 14 March 2023
Last updated: 31 July 2025

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1

ZHAO, XU-AN, and HONGZHU GAO. "IRREDUCIBLE DECOMPOSITIONS OF DEGENERACY LOCI OF MATRICES." International Journal of Algebra and Computation 18, no. 02 (2008): 257–70. http://dx.doi.org/10.1142/s0218196708004433.

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In this paper, we study the irreducible decompositions of the degeneracy loci of matrices which are defined by rank conditions on upper left submatrices. By introducing the concepts of standard and essential rank functions, we give an explicit classification of these degeneracy loci. Based on standard rank functions, we design an algorithm to write a degeneracy locus as a union of its irreducible components. This gives an answer to a problem raised by Sturmfels.
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2

SMALL, A. J. "OSCULATION AND SINGULARITY OF CHARGE 2 (COMPLEXIFIED) BPS MONOPOLES." International Journal of Mathematics 11, no. 07 (2000): 943–48. http://dx.doi.org/10.1142/s0129167x00000453.

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Hurtubise showed that the singular locus of the complexification of a BPS monopole intersects the degeneracy locus of the complex Higgs field in a null curve [Formula: see text] has a dual [Formula: see text]: by adapting a criterion of Hitchin it is shown that for a generic charge 2 monopole, [Formula: see text], the monopole's spectral curve.
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3

EBIHARA, Madoka. "Deformations of a Holomorphic Map and Its Degeneracy Locus." Tokyo Journal of Mathematics 35, no. 2 (2012): 253–77. http://dx.doi.org/10.3836/tjm/1358951317.

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4

Tamvakis, Harry. "Giambelli and Degeneracy Locus Formulas for Classical G/P spaces." Moscow Mathematical Journal 16, no. 1 (2016): 125–77. http://dx.doi.org/10.17323/1609-4514-2016-16-1-125-177.

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5

Ran, Ziv. "A BOGOMOLOV UNOBSTRUCTEDNESS THEOREM FOR LOG-SYMPLECTIC MANIFOLDS IN GENERAL POSITION." Journal of the Institute of Mathematics of Jussieu 19, no. 5 (2018): 1509–19. http://dx.doi.org/10.1017/s1474748018000464.

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We consider compact Kählerian manifolds $X$ of even dimension 4 or more, endowed with a log-symplectic holomorphic Poisson structure $\unicode[STIX]{x1D6F1}$ which is sufficiently general, in a precise linear sense, with respect to its (normal-crossing) degeneracy divisor $D(\unicode[STIX]{x1D6F1})$. We prove that $(X,\unicode[STIX]{x1D6F1})$ has unobstructed deformations, that the tangent space to its deformation space can be identified in terms of the mixed Hodge structure on $H^{2}$ of the open symplectic manifold $X\setminus D(\unicode[STIX]{x1D6F1})$, and in fact coincides with this $H^{2
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6

Basok, M. "On some degeneracy loci in the moduli space of pointed odd spin curves." St. Petersburg Mathematical Journal 32, no. 5 (2021): 819–45. http://dx.doi.org/10.1090/spmj/1672.

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Let C C be a smooth projective curve of genus g ≥ 3 g\geq 3 and let η \eta be an odd theta characteristic on it such that h 0 ( C , η ) = 1 h^0(C,\eta ) = 1 . Pick a point p p from the support of η \eta and consider the one-dimensional linear system | η + p | |\eta + p| . In general this linear system is base-point free and all its ramification points are simple. The locus in the moduli space of odd spin curves is studied where the linear system | η + p | |\eta + p| fails to have this general behavior. This locus is stratified with respect to multiplicities of degeneracies; these strata are ca
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7

ITO, Toshikazu, Bruno SCÁRDUA, and Yoshikazu YAMAGISHI. "Degeneracy locus of critical points of the distance function on a holomorphic foliation." Journal of the Mathematical Society of Japan 66, no. 1 (2014): 123–37. http://dx.doi.org/10.2969/jmsj/06610123.

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8

Heier, Gordon. "Uniformly effective Shafarevich Conjecture on families of hyperbolic curves over a curve with prescribed degeneracy locus." Journal de Mathématiques Pures et Appliquées 83, no. 7 (2004): 845–67. http://dx.doi.org/10.1016/j.matpur.2004.02.001.

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9

Renshaw, A. A., and C. D. Mote. "Local Stability of Gyroscopic Systems Near Vanishing Eigenvalues." Journal of Applied Mechanics 63, no. 1 (1996): 116–20. http://dx.doi.org/10.1115/1.2787185.

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Vanishing eigenvalues of a gyroscopic system are always repeated and, as a result of this degeneracy, their eigenfunctions represent a combination of constant displacements with zero velocity and the displacements derived from constant, nonzero velocity. In a second-order formulation of the equations of motion, the assumption of harmonic vibration is not sufficiently general to represent this motion as the displacements derived from constant, nonzero velocity are not included. In a first order formulation, however, the assumption of harmonic vibration is sufficient. Solvability criteria are re
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10

Cheng, Lingyin, Xiaoqing Zhou, Yuling Zheng, et al. "Simple and Rapid Assembly of TALE Modules Based on the Degeneracy of the Codons and Trimer Repeats." Genes 12, no. 11 (2021): 1761. http://dx.doi.org/10.3390/genes12111761.

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Transcription activator-like effectors (TALEs) have been effectively used for targeted genome editing, transcriptional regulation, epigenetic modification, and locus-specific DNA imaging. However, with the advent of the clustered regularly interspaced short palindromic repeat/Cas9 system, an easy-to-use tool with the same function as TALEs, TALEs have recently been abandoned because of their complexity, time consumption, and difficult handling in common labs. Here, we described a degenerated codon-based TALE assembly system for simple, rapid, and efficient TALE assembly. TALE trimers with nonr
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11

Kruglikov, Boris. "Blow-ups and infinitesimal automorphisms of CR-manifolds." Mathematische Zeitschrift 296, no. 3-4 (2020): 1701–24. http://dx.doi.org/10.1007/s00209-020-02488-7.

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Abstract For a real-analytic connected CR-hypersurface M of CR-dimension $$n\geqslant 1$$ n ⩾ 1 having a point of Levi-nondegeneracy the following alternative is demonstrated for its symmetry algebra $$\mathfrak {s}={\mathfrak {s}}(M)$$ s = s ( M ) : (i) either $$\dim {\mathfrak {s}}=n^2+4n+3$$ dim s = n 2 + 4 n + 3 and M is spherical everywhere; (ii) or $$\dim {\mathfrak {s}}\leqslant n^2+2n+2+\delta _{2,n}$$ dim s ⩽ n 2 + 2 n + 2 + δ 2 , n and in the case of equality M is spherical and has fixed signature of the Levi form in the complement to its Levi-degeneracy locus. A version of this resu
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12

Pinskaya, Marina, Anitha Nair, David Clynes, Antonin Morillon, and Jane Mellor. "Nucleosome Remodeling and Transcriptional Repression Are Distinct Functions of Isw1 in Saccharomyces cerevisiae." Molecular and Cellular Biology 29, no. 9 (2009): 2419–30. http://dx.doi.org/10.1128/mcb.01050-08.

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ABSTRACT The SANT domain is a nucleosome recognition module found in transcriptional regulatory proteins, including chromatin-modifying enzymes. It shows high functional degeneracy between species, varying in sequence and copy number. Here, we investigate functions in vivo associated with two SANT motifs, SANT and SLIDE, in the Saccharomyces cerevisiae Isw1 chromatin-remodeling ATPase. We show that differences in the primary structures of the SANT and SLIDE domains in yeast and Drosophila melanogaster reflect their different functions. In yeast, the SLIDE domain is required for histone interac
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13

Grigoriev, M., and P. Hsieh. "A histone octamer blocks branch migration of a Holliday junction." Molecular and Cellular Biology 17, no. 12 (1997): 7139–50. http://dx.doi.org/10.1128/mcb.17.12.7139.

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The Holliday junction is a key intermediate in genetic recombination. Here, we examine the effect of a nucleosome core on movement of the Holliday junction in vitro by spontaneous branch migration. Histone octamers consisting of H2A, H2B, H3, and H4 are reconstituted onto DNA duplexes containing an artificial nucleosome-positioning sequence consisting of a tandem array of an alternating AT-GC sequence motif. Characterization of the reconstituted branch migration substrates by micrococcal nuclease mapping and exonuclease III and hydroxyl radical footprinting reveal that 70% of the reconstituted
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14

Torres, J. F., D. Henry, A. Komiya, and S. Maruyama. "Bifurcation analysis of steady natural convection in a tilted cubical cavity with adiabatic sidewalls." Journal of Fluid Mechanics 756 (September 4, 2014): 650–88. http://dx.doi.org/10.1017/jfm.2014.448.

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AbstractNatural convection in an inclined cubical cavity heated from two opposite walls maintained at different temperatures and with adiabatic sidewalls is investigated numerically. The cavity is inclined by an angle $\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}\theta $ around a lower horizontal edge and the isothermal wall set at the higher temperature is the lower wall in the horizontal situation ($\theta = 0^\circ $). A con
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15

Merker, Joël. "On Propagation of Sphericity of Real Analytic Hypersurfaces across Levi Degenerate Loci." Journal of Complex Analysis 2017 (March 28, 2017): 1–8. http://dx.doi.org/10.1155/2017/1314874.

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A connected real analytic hypersurface M⊂Cn+1 whose Levi form is nondegenerate in at least one point—hence at every point of some Zariski-dense open subset—is locally biholomorphic to the model Heisenberg quadric pseudosphere of signature (k,n-k) in one point if and only if, at every other Levi nondegenerate point, it is also locally biholomorphic to some Heisenberg pseudosphere, possibly having a different signature (l,n-l). Up to signature, pseudosphericity then jumps across the Levi degenerate locus and in particular across the nonminimal locus, if there exists any.
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16

Marini, Alfio. "On a family of (1,7)-polarised abelian surfaces." MATHEMATICA SCANDINAVICA 95, no. 2 (2004): 181. http://dx.doi.org/10.7146/math.scand.a-14456.

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We study the geometry of the moduli space of $(1,7)$-polarised abelian surfaces with canonical level structure in detail. In particular we describe the locus where the syzygies of the embedded Heisenberg-invariant abelian surface degenerate, and relate this to the other known descriptions of the moduli space in question.
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17

LUDWIG, Lars R., Tina C. SUMMERFIELD, Janice M. LORD, and Garima SINGH. "Characterization of the mating-type locus (MAT) reveals a heterothallic mating system inKnightiella splachnirima." Lichenologist 49, no. 4 (2017): 373–85. http://dx.doi.org/10.1017/s0024282917000214.

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AbstractIn the present study, we characterized the mating-type locus ofKnightiella splachnirima(Icmadophilaceae) using degenerate and inverse PCR techniques. We screened for the presence of both mating-type locus idiomorphs in DNA extracts of minuscule samples of haploid thalline tissue. We found that only one of the two idiomorphs was present in each sample, and the mating-type ratio (MAT1-1:MAT1-2) was very balanced, being 8:10 and 13:14 at local and global scales, respectively. This indicates that the species is probably self-incompatible and requires the presence of compatible mating partn
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18

Antipova, I. A., and S. Yu Chuvashov. "Singularities of Discriminant Loci of Laurent Polynomial Systems." Bulletin of Irkutsk State University. Series Mathematics 52 (2025): 44–57. https://doi.org/10.26516/1997-7670.2025.52.44.

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We consider a system of n Laurent polynomials in n unknowns with variable complex coefficients. For the reduced discriminant locus of such a system, we study the set of critical points of the Horn–Kapranov parametrization. In a special instance (n = 3), the set of critical values of the parametrization is investigated. It is proved that the multiple root of the corresponding system is degenerate
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19

Newby, L. M., L. White, S. M. DiBartolomeis, et al. "Mutational analysis of the Drosophila miniature-dusky (m-dy) locus: effects on cell size and circadian rhythms." Genetics 128, no. 3 (1991): 571–82. http://dx.doi.org/10.1093/genetics/128.3.571.

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Abstract A mutational analysis has been performed to explore the function of the Drosophila melanogaster miniature-dusky (m-dy) locus. Mutations at this locus affect wing development, fertility and behavior. The genetic characterization of 13 different mutations suggests that m and dy variants are alleles of a single complex gene. All of these mutations alter wing size, apparently by reducing the volume of individual epidermal cells of the developing wing. In m mutants, epidermal cell boundaries persist in the mature wing, whereas they normally degenerate 1-2 hr after eclosion in wild-type or
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20

HWANG, JUN-MUK. "VARIETIES WITH DEGENERATE GAUSS MAPPINGS IN COMPLEX HYPERBOLIC SPACE FORMS." International Journal of Mathematics 13, no. 02 (2002): 209–16. http://dx.doi.org/10.1142/s0129167x02001186.

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In analogy with the Gauss mapping for a subvariety in the complex projective space, the Gauss mapping for a subvariety in a complex hyperbolic space form can be defined as a map from the smooth locus of the subvariety to the quotient of a suitable domain in the Grassmannian. For complex hyperbolic space forms of finite volume, it is proved that the Gauss mapping is degenerate if and only if the subvariety is totally geodesic.
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21

WANG, S., X. LIU, X. XU, et al. "Escherichia coli type III secretion system 2 (ETT2) is widely distributed in avian pathogenic Escherichia coli isolates from Eastern China." Epidemiology and Infection 144, no. 13 (2016): 2824–30. http://dx.doi.org/10.1017/s0950268816000820.

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SUMMARYPathogens utilize type III secretion systems to deliver effector proteins, which facilitate bacterial infections. The Escherichia coli type III secretion system 2 (ETT2) which plays a crucial role in bacterial virulence, is present in the majority of E. coli strains, although ETT2 has undergone widespread mutational attrition. We investigated the distribution and characteristics of ETT2 in avian pathogenic E. coli (APEC) isolates and identified five different ETT2 isoforms, including intact ETT2, in 57·6% (141/245) of the isolates. The ETT2 locus was present in the predominant APEC sero
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22

Odehnal, Boris. "A Rarity in Geometry." KoG, no. 25 (2021): 25–39. http://dx.doi.org/10.31896/k.25.3.

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We study the locus C of all points in the plane whose pedal points on the six sides of a complete quadrangle lie on a conic. In the Euclidean plane, it turns out that C is an algebraic curve of degree 7 and genus 5 and not of degree 12 as it could be expected. Septic curves occur rather seldom in geometry which motivates a detailed study of this particular curve. We look at its singularities, focal points, and those points on C whose pedal conics degenerate. Then, we show that the septic curve occurs as the locus curve for a more general question. Further, we describe those cases where C degen
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23

Vyshnyepolskiy, Vladimir, E. Zavarihina, and D. Peh. "Geometric Locations of Points Equally Distance from Two Given Geometric Figures. Part 4: Geometric Locations of Points Equally Remote from Two Spheres." Geometry & Graphics 9, no. 3 (2021): 12–29. http://dx.doi.org/10.12737/2308-4898-2021-9-3-12-29.

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The article deals with the geometric locations of points equidistant from two spheres. In all variants of the mutual position of the spheres, the geometric places of the points are two surfaces. When the centers of the spheres coincide with the locus of points equidistant from the spheres, there will be spheres equal to the half-sum and half-difference of the diameters of the original spheres. In three variants of the relative position of the initial spheres, one of the two surfaces of the geometric places of the points is a two-sheet hyperboloid of revolution. It is obtained when: 1) the sphe
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24

Xie, Hongjie, Xinchen Li, Yuli Sun, et al. "DNA Methylation of the Autonomous Pathway Is Associated with Flowering Time Variations in Arabidopsis thaliana." International Journal of Molecular Sciences 25, no. 13 (2024): 7478. http://dx.doi.org/10.3390/ijms25137478.

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Plant flowering time is affected by endogenous and exogenous factors, but its variation patterns among different populations of a species has not been fully established. In this study, 27 Arabidopsis thaliana accessions were used to investigate the relationship between autonomous pathway gene methylation, gene expression and flowering time variation. DNA methylation analysis, RT-qPCR and transgenic verification showed that variation in the flowering time among the Arabidopsis populations ranged from 19 to 55 days and was significantly correlated with methylation of the coding regions of six up
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25

Nelson, M. I., and H. S. Sidhu. "Bifurcation phenomena for an oxidation reaction in a continuously stirred tank reactor. II Diabatic operation." ANZIAM Journal 45, no. 3 (2004): 303–26. http://dx.doi.org/10.1017/s1446181100013389.

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AbstractWe extend an investigation into the bifurcation phenomena exhibited by an oxidation reaction in an adiabatic reactor to the case of a diabatic reactor. The primary bifurcation parameter is the fuel fraction; the inflow pressure and inflow temperature are the secondary bifurcation parameters. The inclusion of heat loss in the model does not change the static steady-state bifurcation diagram; the organising centre is a pitchfork singularity for both the adiabatic and diabatic reactors. However, unlike the adiabatic reactor, Hopf bifurcations may occur in the diabatic reactor. We construc
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26

Grieve, Nathan. "Index conditions and cup-product maps on Abelian varieties." International Journal of Mathematics 25, no. 04 (2014): 1450036. http://dx.doi.org/10.1142/s0129167x14500360.

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We study questions surrounding cup-product maps which arise from pairs of non-degenerate line bundles on an abelian variety. Important to our work is Mumford's index theorem which we use to prove that non-degenerate line bundles exhibit positivity analogous to that of ample line bundles. As an application we determine the asymptotic behavior of families of cup-product maps and prove that vector bundles associated to these families are asymptotically globally generated. To illustrate our results we provide several examples. For instance, we construct families of cup-product problems which resul
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27

Gross, Joshua B., James Weagley, Bethany A. Stahl, Li Ma, Luis Espinasa, and Suzanne E. McGaugh. "A local duplication of the Melanocortin receptor 1 locus in Astyanax." Genome 61, no. 4 (2018): 254–65. http://dx.doi.org/10.1139/gen-2017-0049.

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In this study, we report evidence of a novel duplication of Melanocortin receptor 1 (Mc1r) in the cavefish genome. This locus was discovered following the observation of excessive allelic diversity in a ∼820 bp fragment of Mc1r amplified via degenerate PCR from a natural population of Astyanax aeneus fish from Guerrero, Mexico. The cavefish genome reveals the presence of two closely related Mc1r open reading frames separated by a 1.46 kb intergenic region. One open reading frame corresponds to the previously reported Mc1r receptor, and the other open reading frame (duplicate copy) is 975 bp in
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28

Hezemans, Frank H., Noham Wolpe, Claire O’Callaghan, et al. "Noradrenergic deficits contribute to apathy in Parkinson’s disease through the precision of expected outcomes." PLOS Computational Biology 18, no. 5 (2022): e1010079. http://dx.doi.org/10.1371/journal.pcbi.1010079.

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Apathy is a debilitating feature of many neuropsychiatric diseases, that is typically described as a reduction of goal-directed behaviour. Despite its prevalence and prognostic importance, the mechanisms underlying apathy remain controversial. Degeneration of the locus coeruleus-noradrenaline system is known to contribute to motivational deficits, including apathy. In healthy people, noradrenaline has been implicated in signalling the uncertainty of expectations about the environment. We proposed that noradrenergic deficits contribute to apathy by modulating the relative weighting of prior bel
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29

Li, Wenli, Jianhua Ju, Hiroyuki Osada, and Ben Shen. "Utilization of the Methoxymalonyl-Acyl Carrier Protein Biosynthesis Locus for Cloning of the Tautomycin Biosynthetic Gene Cluster from Streptomyces spiroverticillatus." Journal of Bacteriology 188, no. 11 (2006): 4148–52. http://dx.doi.org/10.1128/jb.00172-06.

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ABSTRACT Tautomycin (TTM), a potent protein phosphatase inhibitor, consists of a polyketide chain containing a spiroketal moiety and an acyl chain bearing a dialkylmaleic anhydride structure. PCR using degenerate primers was used to clone genes from Streptomyces spiroverticillatus for formation of the methoxymalonyl-acyl carrier protein. This locus was found to contain five genes (ttmC, ttmA, ttmD, ttmB, and ttmE), one of which was used as a probe to clone the 110-kb TTM biosynthetic gene cluster. The involvement of the ttmA gene in TTM biosynthesis was confirmed by gene inactivation and mutat
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30

MacConaill, Laura E., Derek Butler, Mary O'Connell-Motherway, Gerald F. Fitzgerald, and Douwe van Sinderen. "Identification of Two-Component Regulatory Systems in Bifidobacterium infantis by Functional Complementation and Degenerate PCR Approaches." Applied and Environmental Microbiology 69, no. 7 (2003): 4219–26. http://dx.doi.org/10.1128/aem.69.7.4219-4226.2003.

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ABSTRACT Two-component signal transduction systems (2CSs) are widely used by bacteria to sense and adapt to changing environmental conditions. With two separate approaches, three different 2CSs were identified on the chromosome of the probiotic bacterium Bifidobacterium infantis UCC 35624. One locus was identified by means of functional complementation of an Escherichia coli mutant. Another two were identified by PCR with degenerate primers corresponding to conserved regions of one protein component of the 2CS. The complete coding regions for each gene cluster were obtained, which showed that
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31

Provencher, Cathy, Gis�le LaPointe, St�phane Sirois, Marie-Rose Van Calsteren, and Denis Roy. "Consensus-Degenerate Hybrid Oligonucleotide Primers for Amplification of Priming Glycosyltransferase Genes of the Exopolysaccharide Locus in Strains of the Lactobacillus casei Group." Applied and Environmental Microbiology 69, no. 6 (2003): 3299–307. http://dx.doi.org/10.1128/aem.69.6.3299-3307.2003.

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ABSTRACT A primer design strategy named CODEHOP (consensus-degenerate hybrid oligonucleotide primer) for amplification of distantly related sequences was used to detect the priming glycosyltransferase (GT) gene in strains of the Lactobacillus casei group. Each hybrid primer consisted of a short 3′ degenerate core based on four highly conserved amino acids and a longer 5′ consensus clamp region based on six sequences of the priming GT gene products from exopolysaccharide (EPS)-producing bacteria. The hybrid primers were used to detect the priming GT gene of 44 commercial isolates and reference
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32

Daryono, Budi Setiadi. "Application of Molecular Biology for Identification of Virus Resistance Gene in Melon." Indonesian Journal of Biotechnology 20, no. 1 (2016): 19. http://dx.doi.org/10.22146/ijbiotech.15265.

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Source of resistance to an Indonesia isolate of Cucumber mosaic virus (CMV-B2) in melon cultivarYamatouri has been reported. Moreover, Creb-2, a locus that confers resistance to CMV-B2 in Yamatouri hasbeen determined as a single dominant gene. To elucidate the resistance mechanism conferred by Creb-2 inmore detail, it is necessary to clone the Creb-2 gene and determine its molecular structure. One approach isby amplification and cloning of melon resistance gene analogs (MRGAs) based on degenerated PCR primersdesigned from conserved amino acids in the NBS-LRR motifs (P-loop, Kinase-2, and the G
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33

Jellison, Brandon J., Harold R. Kess, Douglas E. Adams, and David C. Nelson. "Nondestructive Evaluation of Parts With Degenerate Modes Using Pseudorepeated Roots." Journal of Dynamic Systems, Measurement, and Control 126, no. 3 (2004): 498–508. http://dx.doi.org/10.1115/1.1789536.

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The modes of vibration of manufactured parts can be good indicators of the overall quality of the manufacturing process. That is, deviations in the modal frequencies or modal vectors of mechanical parts can help to identify outlier or systemic problems in the raw materials or fabrication procedure. A novel method for characterizing nonuniformities in homogeneous symmetric parts using pseudorepeated modal frequencies is discussed in this paper. It is demonstrated that the spacing between pseudorepeated roots in dominantly symmetric manufactured parts is a direct indicator of nonuniformities (i.
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34

Rydholm, C., P. S. Dyer, and F. Lutzoni. "DNA Sequence Characterization and Molecular Evolution of MAT1 and MAT2 Mating-Type Loci of the Self-Compatible Ascomycete Mold Neosartorya fischeri." Eukaryotic Cell 6, no. 5 (2007): 868–74. http://dx.doi.org/10.1128/ec.00319-06.

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ABSTRACT Degenerate PCR and chromosome-walking approaches were used to identify mating-type (MAT) genes and flanking regions from the homothallic (sexually self-fertile) euascomycete fungus Neosartorya fischeri, a close relative of the opportunistic human pathogen Aspergillus fumigatus. Both putative alpha- and high-mobility-group-domain MAT genes were found within the same genome, providing a functional explanation for self-fertility. However, unlike those in many homothallic euascomycetes (Pezizomycotina), the genes were not found adjacent to each other and were termed MAT1 and MAT2 to recog
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35

Wheeler, J. Craig. "Type IA Supernovae." Symposium - International Astronomical Union 151 (1992): 225–34. http://dx.doi.org/10.1017/s0074180900122223.

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Spectral calculations show that a model based on the thermonuclear explosion of a degenerate carbon/oxygen white dwarf provides excellent agreement with observations of Type Ia supernovae. Identification of suitable evolutionary progenitors remains a severe problem. General problems with estimation of supernova rates are outlined and the origin of Type Ia supernovae from double degenerate systems are discussed in the context of new rates of explosion per H band luminosity, the lack of observed candidates, and the likely presence of H in the vicinity of some SN Ia events. Re-examination of the
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36

Zhao, Chunhua, Jianhua Ju, Steven D. Christenson, et al. "Utilization of the Methoxymalonyl-Acyl Carrier Protein Biosynthesis Locus for Cloning the Oxazolomycin Biosynthetic Gene Cluster from Streptomyces albus JA3453." Journal of Bacteriology 188, no. 11 (2006): 4142–47. http://dx.doi.org/10.1128/jb.00173-06.

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ABSTRACT Oxazolomycin (OZM), a hybrid peptide-polyketide antibiotic, exhibits potent antitumor and antiviral activities. Using degenerate primers to clone genes encoding methoxymalonyl-acyl carrier protein (ACP) biosynthesis as probes, a 135-kb DNA region from Streptomyces albus JA3453 was cloned and found to cover the entire OZM biosynthetic gene cluster. The involvement of the cloned genes in OZM biosynthesis was confirmed by deletion of a 12-kb DNA fragment containing six genes for methoxymalonyl-ACP biosynthesis from the specific region of the chromosome, as well as deletion of the ozmC ge
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37

Li, Baokun, Yi Cao, Qiuju Zhang, and Zhen Huang. "Position-singularity analysis of a special class of the Stewart parallel mechanisms with two dissimilar semi-symmetrical hexagons." Robotica 31, no. 1 (2012): 123–36. http://dx.doi.org/10.1017/s0263574712000148.

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SUMMARYIn this paper, for a special class of the Stewart parallel mechanism, whose moving platform and base one are two dissimilar semi-symmetrical hexagons, the position-singularity of the mechanism for a constant-orientation is analyzed systematically. The force Jacobian matrix [J]T is constructed based on the principle of static equilibrium and the screw theory. After expanding the determinant of the simplified matrix [D], whose rank is the same as the rank of the matrix [J]T, a cubic symbolic expression that represents the 3D position-singularity locus of the mechanism for a constant-orien
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Horvath, Philippe, Dennis A. Romero, Anne-Claire Coûté-Monvoisin, et al. "Diversity, Activity, and Evolution of CRISPR Loci in Streptococcus thermophilus." Journal of Bacteriology 190, no. 4 (2007): 1401–12. http://dx.doi.org/10.1128/jb.01415-07.

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ABSTRACT Clustered regularly interspaced short palindromic repeats (CRISPR) are hypervariable loci widely distributed in prokaryotes that provide acquired immunity against foreign genetic elements. Here, we characterize a novel Streptococcus thermophilus locus, CRISPR3, and experimentally demonstrate its ability to integrate novel spacers in response to bacteriophage. Also, we analyze CRISPR diversity and activity across three distinct CRISPR loci in several S. thermophilus strains. We show that both CRISPR repeats and cas genes are locus specific and functionally coupled. A total of 124 strai
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Baranovskii, Serhij, Andrij Bomba, and Oksana Pryshchepa. "Modeling the Influence of Small-Scale Diffusion Perturbations on the Development of Infectious Diseases under Immunotherapy." Modeling, Control and Information Technologies, no. 4 (October 22, 2020): 15–18. http://dx.doi.org/10.31713/mcit.2020.12.

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The article proposes a modification of the mathematical model of the immunotherapy influence on the immune response dynamics taking into account small-scale diffusion perturbations. The solution of the corresponding singularly perturbed model problem with time-delay is reduced to a sequence of solutions without time-delay, for that representations of the required functions in the form of asymptotic series as disturbances of solutions of the corresponding degenerate problems are constructed. We present the results of numerical modeling that illustrate the influence of diffusion redistribution o
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WOLF, CHRISTIAN. "Variation of topological pressure and dimension: from polynomials to complex Hénon maps." Ergodic Theory and Dynamical Systems 34, no. 3 (2013): 1018–36. http://dx.doi.org/10.1017/etds.2012.166.

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AbstractWe study the topological pressure and dimension theory of complex Hénon maps which are small perturbations of one-dimensional polynomials. In particular, we derive regularity results for the generalized pressure function in a neighborhood of the degenerate map (i.e. the polynomial). This unifies results concerning the regularity of the pressure function for polynomials by Ruelle and for complex Hénon maps by Verjovsky and Wu. We then apply this regularity to show that the Hausdorff dimension of the Julia set is a continuous non-differentiable function in a neighborhood of the polynomia
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Jackson, Colin J., Takashi Mochizuki, and Richard C. Barton. "PCR fingerprinting of Trichophyton mentagrophytes var. interdigitale using polymorphic subrepeat loci in the rDNA nontranscribed spacer." Journal of Medical Microbiology 55, no. 10 (2006): 1349–55. http://dx.doi.org/10.1099/jmm.0.46691-0.

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The sequence of the nontranscribed spacer (NTS) region of the rDNA of Trichophyton mentagrophytes var. interdigitale strain 2111 was determined, and three individual subrepeat loci identified. The first repeat region contained eight tandem copies of a degenerate 33–43 bp sequence, whilst the second had two complete and two partial 300 bp repeats. The third locus contained six tandemly repetitive elements of between 67 and 89 bp, which showed sequence identity to the TrS2 repeats of Trichophyton rubrum. PCR amplification of the individual repetitive regions from 42 random isolates of T. mentagr
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42

Arbarello, Enrico, Giulio Codogni, and Giuseppe Pareschi. "Characterizing Jacobians via the KP equation and via flexes and degenerate trisecants to the Kummer variety: An algebro-geometric approach." Journal für die reine und angewandte Mathematik (Crelles Journal) 2021, no. 777 (2021): 251–71. http://dx.doi.org/10.1515/crelle-2021-0020.

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Abstract We give completely algebro-geometric proofs of a theorem by T. Shiota, and of a theorem by I. Krichever, characterizing Jacobians of algebraic curves among all irreducible principally polarized abelian varieties. Shiota’s characterization is given in terms of the KP equation. Krichever’s characterization is given in terms of trisecant lines to the Kummer variety. Here we treat the case of flexes and degenerate trisecants. The basic tool we use is a theorem we prove asserting that the base locus of the linear system associated to an effective line bundle on an abelian variety is reduce
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43

SANYAL, DULAL CHANDRA, and BIJAN SARKAR. "A THEORETICAL FRAMEWORK RELATING TO EXPONENTIALLY FREQUENCY-DEPENDENT SELECTION MODEL IN POLLAK'S SENSE." International Journal of Biomathematics 02, no. 02 (2009): 179–96. http://dx.doi.org/10.1142/s1793524509000571.

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Allowing the exponentially frequency-dependent fitnesses and taking into consideration the viability effect on the fertility model, a deterministic mathematical model of selection in a one-locus two-allele genetic system has been developed in such a way that equilibrium frequencies of the three genotypes are the same as those of optimizing the mean fertility of the population. Under the consideration of both exponentially increasing and decreasing nature environments in the sense of viability and fertility selections to be opposite, degenerate optimization points have been calculated by verify
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Meyer, Richard. "The R1162 Mob Proteins Can Promote Conjugative Transfer from Cryptic Origins in the Bacterial Chromosome." Journal of Bacteriology 191, no. 5 (2008): 1574–80. http://dx.doi.org/10.1128/jb.01471-08.

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ABSTRACT The mobilization proteins of the broad-host-range plasmid R1162 can initiate conjugative transfer of a plasmid from a 19-bp locus that is partially degenerate in sequence. Such loci are likely to appear by chance in the bacterial chromosome and could act as cryptic sites for transfer of chromosomal DNA when R1162 is present. The R1162-dependent transfer of chromosomal DNA, initiated from one such potential site in Pectobacterium atrosepticum, is shown here. A second active site was identified in Escherichia coli, where it is also shown that large amounts of DNA are transferred. This t
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45

Hiszczynska-Sawicka, Ela, Dongmei Li, and Karen F. Armstrong. "Universal Mitochondrial Multi-Locus Sequence Analysis (mtMLSA) to Characterise Populations of Unanticipated Plant Pest Biosecurity Detections." Biology 11, no. 5 (2022): 654. http://dx.doi.org/10.3390/biology11050654.

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Biosecurity responses to post-border exotic pest detections are more effective with knowledge of where the species may have originated from or if recurrent detections are connected. Population genetic markers for this are typically species-specific and not available in advance for any but the highest risk species, leaving other less anticipated species difficult to assess at the time. Here, new degenerate PCR primer sets are designed for within the Lepidoptera and Diptera for the 3′ COI, ND3, ND6, and 3′ plus 5′ 16S gene regions. These are shown to be universal at the ordinal level amongst spe
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Odehnal, Boris. "Distance Product Cubics." KoG, no. 24 (2020): 29–40. http://dx.doi.org/10.31896/k.24.3.

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The locus of points that determine a constant product of their distances to the sides of a triangle is a cubic curve in the projectively closed Euclidean triangle plane. In this paper, algebraic and geometric properties of these distance product cubics shall be studied. These cubics span a pencil of cubics that contains only one rational and non-degenerate cubic curve which is known as the Bataille acnodal cubic determined by the product of the actual trilinear coordinates of the centroid of the base triangle. Each triangle center defines a distance product cubic. It turns out that only a smal
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Miller, William G., Emma Yee, and James L. Bono. "Complete Genome Sequencing of Four Arcobacter Species Reveals a Diverse Suite of Mobile Elements." Genome Biology and Evolution 12, no. 2 (2020): 3850–56. http://dx.doi.org/10.1093/gbe/evaa014.

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Abstract Arcobacter species are recovered from a wide variety of sources, including animals, food, and both fresh and marine waters. Several Arcobacter species have also been recovered from human clinical samples and are thus associated tentatively with food- and water-borne human illnesses. Genome sequencing of the poultry isolate Arcobacter cibarius H743 and the Arcobacter acticola, Arcobacter pacificus, and Arcobacter porcinus type strains identified a large number and variety of insertion sequences. This study presents an analysis of these A. acticola, A. cibarius, A. pacificus, and A. por
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Rahemi, Alireza, Thomas M. Gradziel, Jose X. Chaparro, et al. "Phylogenetic relationships among the first and second introns of selected Prunus S-RNase genes." Canadian Journal of Plant Science 95, no. 6 (2015): 1145–54. http://dx.doi.org/10.4141/cjps-2015-102.

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Rahemi, A., Gradziel T.M., Chaparro J.X., Folta, K.M., Taghavi, T., Fatahi, R., Ebadi, A. and Hassani, D. 2015. Phylogenetic relationships among the first and second introns of selected Prunus S-RNase genes. Can. J. Plant Sci. 95: 1145–1154. To identify and evaluate self-incompatible alleles in almonds and related germplasm, DNA from 15 Prunus species was amplified using two degenerate consensus primer pairs flanking first and second S-locus introns (PaConsI-FD+EM-Pc1ConsRD and EM-Pc2ConsFD+EM-Pc3ConsRD). Twenty-eight amplified PCR products were analyzed by automated sequencer capillary electr
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Rose, Timothy M., Jonathan T. Ryan, Emily R. Schultz, Brian W. Raden, and Che-Chung Tsai. "Analysis of 4.3 Kilobases of Divergent Locus B of Macaque Retroperitoneal Fibromatosis-Associated Herpesvirus Reveals a Close Similarity in Gene Sequence and Genome Organization to Kaposi's Sarcoma-Associated Herpesvirus." Journal of Virology 77, no. 9 (2003): 5084–97. http://dx.doi.org/10.1128/jvi.77.9.5084-5097.2003.

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ABSTRACT We previously identified retroperitoneal fibromatosis-associated herpesvirus (RFHV) as a simian homolog of Kaposi's sarcoma-associated herpesvirus (KSHV) in a fibroproliferative malignancy of macaques that has similarities to Kaposi's sarcoma. In this report, we cloned 4.3 kb of divergent locus B (DL-B) flanking the DNA polymerase gene from two variants of RFHV from different species of macaque with a consensus degenerate hybrid oligonucleotide primer approach. Within the DL-B region of RFHV, viral homologs of the cellular interleukin-6, dihydrofolate reductase, and thymidylate syntha
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50

Tarigan T., Tomy Anditia, and Gede Eka Rusdi Antara. "DIFFICULT HELLER MYOTOMY DUE TO PROMINENT LARGE LEFT LIVER LOBE." PREPOTIF : JURNAL KESEHATAN MASYARAKAT 8, no. 3 (2024): 6471–78. https://doi.org/10.31004/prepotif.v8i3.35276.

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Achalasia Esofagus adalah gangguan motilitas esofagus yang ditandai dengan kegagalan peristaltik dan ketidakmampuan sfingter esofagus bagian bawah (LES) untuk relaksasi. Hal ini disebabkan oleh degenerasi pleksus saraf mienterikus pada dinding esofagus. Dalam kasus ini, kami melaporkan seorang pasien laki-laki berusia 24 tahun dengan achalasia esofagus. Tantangan teknis dalam kasus ini adalah adanya lobus hati kiri yang besar dan menonjol. Pasien laki-laki berusia 24 tahun tersebut dirawat di Rumah Sakit Umum Prof. IGNG Ngoerah dengan keluhan utama disfagia. Pasien mengeluhkan kesulitan menela
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