24,211 research outputs found

    Allelic Frequency of Kappa-Casein Locus (Asp148/Ala) in F1: Simmental (Bos Taurus) X Ongole Grade (Bos Indicus)

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    This study was conducted to detect the genetic variants (single nucleotide polymorphism) of kappa-casein locus (Asp148/Ala) in F1: Simmental (Bos taurus) x Ongole grade (Bos indicus), SIMPO. Genomic DNA was isolated from blood sample of 40 SIMPO (21 males and 19 females). A 780 bp specific fragment of kappa-casein gene spanning from the forth exon region (517 bp) to forth intron (263 bp) was successfully amplified. The result of the PCR-RFLP (Polymerase Chain Reaction - Restriction Fragment Length Polymorphisms) analysis using HindIII enzyme showed that two genotypes (AA and AB) were found at this locus in SIMPO. The frequencies of A and B alleles in SIMPO were 0.79 and 0.21, respectively. The frequency lies between B. taurus (Simmental) and B. indicus group

    Lepton flavor violating μeγ\mu\to e\gamma and μe\mu-e conversion in unparticle physics

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    We have studied lepton flavor violation processes μeγ\mu\to e\gamma and μe\mu-e conversion in nuclei induced by unparticle. Both Br(μeγ){\rm Br}(\mu\to e\gamma) and μe\mu-e conversion rate CR(μe,Nuclei){\rm CR}(\mu-e,{\rm Nuclei}) strongly depend on the scale dimension dUd_{\cal U} and the unparticle coupling λKff\lambda^{ff'}_{\rm K}(K=V, A, S, P). Present experimental upper bounds on Br(μeγ){\rm Br}(\mu\to e\gamma), CR(μe,Ti){\rm CR}(\mu-e,{\rm Ti}) and CR(μe,Au){\rm CR}(\mu-e,{\rm Au}) put stringent constraints on the parameters of unaprticle physics. The scale dimensions dUd_{\cal U} around 2 are favored for the unparticle scale ΛU\Lambda_{\cal U} of O(10TeV){\cal O}(10 {\rm TeV}) and the unparticle coupling of O(103){\cal O}(10^{-3}). CR(μe,Nuclei){\rm CR}(\mu-e,{\rm Nuclei}) is proportional to Zeff4A2/Z\rm{Z^4_{eff}A^2/Z} for the pure vector and scalar couplings between unparticle and SM fermions, this peculiar atomatic number dependence can be used to distinguish unparticle from other theoretical models.Comment: 16 pages, 5 figure

    Higgs Triplets, Decoupling, and Precision Measurements

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    Electroweak precision data has been extensively used to constrain models containing physics beyond that of the Standard Model. When the model contains Higgs scalars in representations other than SU(2) singlets or doublets, and hence rho not equal to one at tree level, a correct renormalization scheme requires more inputs than the three needed for the Standard Model. We discuss the connection between the renormalization of models with Higgs triplets and the decoupling properties of the models as the mass scale for the scalar triplet field becomes much larger than the electroweak scale. The requirements of perturbativity of the couplings and agreement with electroweak data place strong restrictions on models with Higgs triplets. Our results have important implications for Little Higgs type models and other models with rho not equal to one at tree level.Comment: 23 page

    Symplectic Reduction and Symmetry Algebra in Boundary Chern-Simons theory

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    We derive the Kac-Moody algebra and Virasoro algebra in Chern-Simons theory with boundary by using the symplectic reduction method and the Noether procedures.Comment: References are adde

    Evaluation of microstructure and mechanical property variations in AlxCoCrFeNi high entropy alloys produced by a high-throughput laser deposition method

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    Twenty-one distinct AlxCoCrFeNi alloys were rapidly prepared by laser alloying an equiatomic CoCrFeNi substrate with Al powder to create an alloy library ranging x=0.15-1.32. Variations in crystal structure, microstructure and mechanical properties were investigated using X-ray diffraction, scanning electron microscopy, scanning transmission electron microscopy and nanoindentation. With increasing Al content, the crystal structure transitioned from a disordered FCC to a mixture of disordered BCC and ordered B2 structures. While the onset of BCC/B2 formation was consistent with previously reported cast alloys, the FCC structure was observed at larger Al contents in the laser processed materials, resulting in a wider two phase regime. The FCC phase was primarily confined to the BCC/B2 grain boundaries at these high Al contents. The nanoindentation modulus and hardness of the FCC phase increased with Al content, while the properties of the BCC/B2 structure were insensitive to composition. The structure and mechanical properties of the laser-processed alloys were surprisingly consistent with reported results for cast alloys, demonstrating the feasibility of applying this high-throughput methodology to multicomponent alloy design.Comment: 20 pages, 8 figures and 1 tabl

    Mirror symmetry on K3 surfaces via Fourier-Mukai transform

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    We use a relative Fourier-Mukai transform on elliptic K3 surfaces XX to describe mirror symmetry. The action of this Fourier-Mukai transform on the cohomology ring of XX reproduces relative T-duality and provides an infinitesimal isometry of the moduli space of algebraic structures on XX which, in view of the triviality of the quantum cohomology of K3 surfaces, can be interpreted as mirror symmetry.Comment: 15 pages, AMS-LaTeX v1.2. Final version to appear in Commun. Math. Phy

    Comments on `` Black Hole Entropy from Conformal Field Theory in Any Dimension ''

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    In a recent letter, Carlip proposed a generalization of the Brown-Henneaux-Strominger construction to any dimension. We present two criticisms about his formulation.Comment: 4 pages, Enriched version for the accepted one (Phys. Rev. Lett.

    Upacara Daur Hidup dalam Pernikahan Adat Sunda

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    Custom of wedding ceremony in Sunda ethnic has three parts: before wedding (pre-luminal), wedding procession (luminal) and after wedding (postluminal).This wedding of Sunda custom directly or indirectly has symbols and meanings which have absorbed Islamic values, which came in the fifteenth century in the Sunda Land. Hence, Sunda values and norms have completed Islamization. This Islamizaion is still going, without eliminating those values and customs which do not contravene Islamic religion.DOI: 10.15408/ref.v13i5.91

    Cation mono- and co-doped anatase TiO2_2 nanotubes: An {\em ab initio} investigation of electronic and optical properties

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    The structural, electronic, and optical properties of metal (Si, Ge, Sn, and Pb) mono- and co-doped anatase TiO2_{2} nanotubes are investigated, in order to elucidate their potential for photocatalytic applications. It is found that Si doped TiO2_{2} nanotubes are more stable than those doped with Ge, Sn, or Pb. All dopants lower the band gap, except the (Ge, Sn) co-doped structure, the decrease depending on the concentration and the type of dopant. Correspondingly, a redshift in the optical properties for all kinds of dopings is obtained. Even though a Pb mono- and co-doped TiO2_{2} nanotube has the lowest band gap, these systems are not suitable for water splitting, due to the location of the conduction band edges, in contrast to Si, Ge, and Sn mono-doped TiO2_{2} nanotubes. On the other hand, co-doping of TiO2_{2} does not improve its photocatalytic properties. Our findings are consistent with recent experiments which show an enhancement of light absorption for Si and Sn doped TiO2_{2} nanotubes.Comment: revised and updated, 23 pages (preprint style), 7 figures, 5 table
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