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101.
Vehniäinen MarkusLeivo Janne Lamminmäki Urpo 《Trends in analytical chemistry : TRAC》2011,30(2):219-226
The use of antibodies in immunodiagnostics has achieved new insights with recombinant technologies. This review summarizes the methods used to produce recombinant antibodies and those to tailor their properties. Finally, we address the advantages and the possibilities of recombinant antibodies in immunoanalytical applications through examples with the main focus on applications related to food quality and safety analysis. 相似文献
102.
Hirotoshi Furusho Jorma Hölsä Taneli Laamanen Mika Lastusaari Janne Niittykoski Yasuo Okajima Aishi Yamamoto 《Journal of luminescence》2008,128(5-6):881-884
The Sr2MgSi2O7:Eu2+,Dy3+ materials were prepared with a solid state reaction and their microscopic structure (at 295 K only) and luminescence were studied at selected temperatures between 150 and 295 K. Undisturbed Sr crystal planes were common in the TEM images of the undoped Sr2MgSi2O7 material, whereas with Eu2+ doping more disturbed planes were observed even in the nanometer scale. With Dy3+ co-doping, a large number of small lattice domains created by the discontinuities in the crystal structure was observed. The domains with different orientations seem to be centered around point defects. The decay curves of Sr2MgSi2O7:Eu2+,Dy3+ showed fast (ms scale) persistent luminescence. The intensity of persistent luminescence increased considerably between 200 and 250 K while remaining constant in the ranges of 150–200 and 250–295 K. The changes were used to study the depth of the traps. In general, Dy3+ co-doping was found to deepen the traps. 相似文献
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Koshevoy IO Lin CL Karttunen AJ Jänis J Haukka M Tunik SP Chou PT Pakkanen TA 《Chemistry (Weinheim an der Bergstrasse, Germany)》2011,17(41):11456-11466
Reactions of the homoleptic (AuC(2)R)(n) precursors with stoichiometric amount of diphosphine ligand PPh(2)C(6)H(4)PPh(2) (P^P) and Cu(+) ions lead to an assembly of a new family of bimetallic clusters [Au(6)Cu(2)(C(2)R)(6)(P^P)(2)](2+) (type I; R=9-fluorenolyl (1), diphenylmethanolyl (2), 2,6-dimethyl-4-heptanolyl (3), 1-cyclohexanolyl (4), Cy (5), tBu (6)). In the case of R=1-cyclohexanolyl, a structurally different complex [Au(6)Cu(2)(C(2)C(6)H(11)O)(6)(P^P)(3)](2+) (7, type II) could be obtained by treatment of 4 with one equivalent of the diphosphine, while for R=isopropanolyl only the latter type of cluster [Au(6)Cu(2)(C(2)C(3)H(7)O)(6)(P^P)(3)](2+) (8) was detected. Steric bulkiness of the alkynyl ligands and O···H-O hydrogen bonding are suggested to play an important role in stabilizing the type I and type II cluster structural motif, respectively. All the complexes exhibit intense photoluminescence in solution with emission parameters that depending on the geometrical arrangement of the octanuclear metal core. The clusters 1-4 and 6 show single emission band in a blue region (469-488 nm) with maximum quantum yield of 94% (4), while structurally different 7 and 8 emit yellow-orange (590 nm) with unity quantum efficiency. The theoretical DFT calculations of the electronic structures have been carried out to demonstrate that the metal-centered triplet emission within the heterometallic core plays a key role for the observed phosphorescence. 相似文献
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We analyze the coupling between surface plasmon polaritons in a metal grating and the guided modes of a dielectric waveguide. Our model structure is a gold wire grating on a slab waveguide made of silicon nitride on silica wafer. The excitation of guided-mode resonances, surface plasmon polariton modes and hybrid waveguide-plasmon modes are observed in numerical simulations. Our experiments verify the existence of the predicted modes. These hybrid modes add significant degrees of freedom in designing structures for plasmonic applications. 相似文献
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In 1988, S. Bank showed that if {z n } is a sparse sequence in the complex plane, with convergence exponent zero, then there exists a transcendental entire A(z) of order zero such that f″+A(z)f=0 possesses a solution having {z n } as its zeros. Further, Bank constructed an example of a zero sequence {z n } violating the sparseness condition, in which case the corresponding coefficient A(z) is of infinite order. In 1997, A. Sauer introduced a condition for the density of the points in the zero sequence {z n } of finite convergence exponent such that the corresponding coefficient A(z) is of finite order. 相似文献