排序方式: 共有16条查询结果,搜索用时 234 毫秒
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We study the second and third generation masses in the context of the minimal renormalizable SO(10) theory. We show that if the seesaw takes the noncanonical (type II) form, large atmospheric neutrino mixing angle requires b-tau unification. 相似文献
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JPC – Journal of Planar Chromatography – Modern TLC - A simple and rapid densitometric thin-layer chromatographic method, suitable for monitoring the histamine content of fish and... 相似文献
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Borut Bajc Saša Prelovšek Mitja Rosina 《Zeitschrift für Physik A Hadrons and Nuclei》1986,356(2):187-191
The γγ → gr0 ρ0 → 4π reaction shows a broad peak at 1.5 GeV in the (J P, Jz)=(2+, 2) channel which has no counterpart in the ρ+ ρ? channel. This “resonance” is considered as a candidate for a qqq?q? state in the “s-channel”. We show, however, that it can also be explained by potential scattering of ρ0 ρ0 via the σ-exchange in the “t-channel”. 相似文献
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B. Bajc A. H. Blin B. Hiller M. C. Nemes M. Rosina 《Zeitschrift für Physik A Hadrons and Nuclei》1994,350(3):229-235
We calculate the momentum dependence of three particle verticesσγγ, σργ andσρρ in the context of a Nambu Jona Lasinio type model. We show how they influence the processesγγ→σ→ππ, ρ→γσ andγγ→ρρ and how chiral symmetry shadows the presence of theσ. 相似文献
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Irena Bajc Svetozar Milićev Bogdan Volavšek 《Monatshefte für Chemie / Chemical Monthly》1992,123(4):321-324
Summary The microcristalline phase (NH3OH)2TiF6 has been isolated from aqueous solution. It crystallizes in the tetragonal system with cell parameters:a=9.654±0.005 Å,c=11.546±0.010 Å. The hydroxylammonium fluorotitanate was characterized by vibrational spectroscopy and its thermal decomposition studied by DSC and TG analysis. 相似文献
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Arsenic speciation patterns in freshwater fish 总被引:3,自引:0,他引:3
Muscle of 16 freshwater fish (9 different species belonging to 4 different families) was analysed for arsenic species using HPLC separation (anion and cation exchange) followed by on-line UV-decomposition, hydride generation and AFS detection. The main arsenic compounds found in the extracts were arsenobetaine (AsB), which accounted for 92–100% of extractable arsenic in species of salmonids (Salmo marmoratus, Oncorhynchus mykiss, Salmo trutta m. fario), and dimethylarsinic acid (DMAA), which accounted for 75% of extractable arsenic in burbot (Lota lota). AsB was also found in lower concentrations in almost all other fish species analysed (Silurus glanis, L. lota, Barbus barbus, Rutilus pigus virgo, Chondrostoma nasus). Arsenite (As(III)) and trimethylarsine oxide (TMAO) were detected in low concentrations in some representatives of Cyprinidae only (R. pigus virgo, C. nasus). Except in salmonids, an unknown cationic compound was present in most of the samples in relatively low concentrations. Cluster analysis of the generated data seems to indicate that there is a correlation between fish family and the arsenic speciation pattern. This is especially clear for the salmonids which show a completely separate cluster and thus a very distinct arsenic speciation pattern. 相似文献
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Charanjit S. Aulakh Borut Bajc Alejandra Melfo Andrija Ra
in Goran Senjanovi 《Physics letters. [Part B]》1999,460(3-4)
We show that intermediate scales in supersymmetric grand unified theories may exist naturally. Their origin is traced to the violation of the survival principle: in supersymmetry internal symmetries often forbid cubic couplings in the superpotential. This leads to a plethora of light supermultiplets whose masses are generated only by higher dimensional operators and thus suppressed by the cut-off scale. These new states often carry exotic quantum numbers and may be, in some cases, accessible to experiments in the near future. 相似文献