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21.
Chuanming Duan Steven Rosen James Towt Susan Rouse Haleema Subuhi Salvatore J. Salamone 《Applied biochemistry and biotechnology》1998,69(3):217-224
Carbohydrate-deficient transferrin (CDT) molecules are transferrin isoforms that lack one or both of the carbohydrate groups
attached to a normal human transferrin molecule. CDT has been reported to be a sensitive and specific marker for diagnosing
alcoholism. This report demonstrates the in vitro generation of CDT molecules that can potentially be used as the standard
in measuring CDT concentrations. This was achieved by deglycosylation of human transferrin with the enzyme Endo-β-N-acetylglucosaminidase F2 (Endo-F2). The enzyme was immobilized on sepharose beads, which were packed into a column. The immobilization of the enzyme not only
eliminated the Endo-F2 contamination of CDT, but also rendered the enzyme suitable for repetitive use. In this manner, it was possible to obtain
at least 200 mg of CDT over a period of more than 3 mo, without any noticeable decrease of enzyme activity, using only 3.0
μg of enzyme. This proved to be an efficient method for generating CDT. 相似文献
22.
Aihara H Alston-Garnjost M Avery RE Barbaro-Galtieri A Barker AR Barnett BA Bauer DA Bay A Bengtsson H Bobbink GJ Buchanan CD Buijs A Caldwell DO Chao H Chun S Clark AR Cowan GD Crane DA Dahl OI Daoudi M Derby KA Eastman JJ Eberhard PH Edberg TK Eisner AM Enomoto R Erné FC Fairfield KH Hauptman JM Hofmann W Hylen J Kamae T Kaye HS Kenney RW Khacheryan S Kofler RR Langeveld WG Layter JG Lin WT Linde FL Loken SC Lu A Lynch GR Madaras RJ Magnuson BD Masek GE Mathis LG Matthews JA Maxfield SJ 《Physical review letters》1988,60(23):2355-2358
23.
Aihara H Alston-Garnjost M Avery RE Barker AR Bauer DA Bay A Belcinski R Bingham HH Bloom ED Buchanan CD Caldwell DO Chao HY Chun SB Clark AR Cowan GD Crane DA Dahl OI Daoudi M Derby KA Eastman JJ Eberhard PH Edberg TK Eisner AM Erné FC Fairfield KH Fridman A Godfrey G Hauptman JM Ho C Hofmann W Kamae T Kenney RW Khacheryan S Kofler RR Lambert DJ Langeveld WG Layter JG Lin WT Linde FL Loken SC Lu A Lynch GR Lys JE Madaras RJ Magnuson BD Marsiske H Masek GE Mathis LG Maxfield SJ McNeil RR 《Physical review D: Particles and fields》1990,41(9):2667-2674
24.
Aihara H Alston-Garnjost M Bakken JA Barbaro-Galtieri A Barnes AV Barnett BA Blumenfeld BJ Bross AD Buchanan CD Chamberlain O Chien C Clark AR Cordier A Dahl OI Day CT Derby KA Eberhard PH Fancher DL Fujii H Fujii T Gabioud B Gary JW Gorn W Hadley NJ Hauptman JM Hofmann W Huth JE Hylen J Kamae T Kaye HS Kenney RW Kerth LT Koda RI Kofler RR Kwong KK Layter JG Lindsey CS Loken SC Lu X Lynch GR Madansky L Madaras RJ Maruyama K Marx JN Matthews JA Melnikoff SO Moses W Nemethy P Nygren DR Oddone PJ 《Physical review letters》1985,54(4):274-277
25.
Stefano Costanzi Sean P.N. Rouse Laurence Vanbaelinghem Timothy J. Prior David F. Ewing Andrew N. Boa Grahame Mackenzie 《Tetrahedron letters》2012,53(4):412-415
An efficient route is described to an unusual exocyclic 4-β-d-ribofuranosyl-aminoimidazole nucleoside, related 4-N-benzylaminoimidazoles and imidazole analogues of precursors in the de novo biosynthesis of purines, via a regiospecific and stereoselective base-catalysed Dimroth-type rearrangement of 1-ribofuranosyl and 1-benzyl-5-aminoimidazoles. Use of a 15N labelled precursor showed the unequivocal endo- to exocyclic translocation of the nitrogen atom during the rearrangement. 相似文献
26.
The New Zealand public health sector has used DEA since 1997 to identify efficient expenditure levels to set prices for hospital
services at the DRG level. Given the size of the expenditure (NZ$ 2.6 billion), considerable robustness was required for the
results and sophistication of the models/process. While the model development and application appeared to be successful, politics
overturned the results in the short run. In the longer term, the results have been shown to be reasonably robust and have
become a base-line reference for future developments. As such, this paper reports a relatively successful transfer of theory
into practice. 相似文献
27.
A cooperative theory for the composition dependence of activated processes in binary ionic oxide glasses (the mixed alkali effect) is proposed. It employs the regular solution model and introduces a molecular model, both of which are used in conjunction with appropriate spectroscopic data for obtaining an estimate of the magnitude of the theory's parameters. The nonlinear composition dependences of certain physical properties of mixed alkali systems, as well as their separation into exponential and pre-exponential factors, are shown to follow from these theoretical considerations. 相似文献
28.
An eta-quotient of level N is a modular form of the shape f(z)=∏δ|Nη(δz)rδ. We study the problem of determining levels N for which the graded ring of holomorphic modular forms for Γ0(N) is generated by (holomorphic, respectively weakly holomorphic) eta-quotients of level N . In addition, we prove that if f(z) is a holomorphic modular form that is non-vanishing on the upper half plane and has integer Fourier coefficients at infinity, then f(z) is an integer multiple of an eta-quotient. Finally, we use our results to determine the structure of the cuspidal subgroup of J0(2k)(Q). 相似文献
29.
Jeremy Rouse 《The Ramanujan Journal》2006,12(2):197-205
We provide uniform formulas for the real period and the trace of Frobenius associated to an elliptic curve in Legendre normal
form. These are expressed in terms of classical and Gaussian hypergeometric functions, respectively.
2000 Mathematics Subject Classification Primary—11G05, 33C05
This research was supported by K. Ono’s NSF grant 相似文献
30.