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《分析化学》1982,(12)
研究报告期页码 1) 6)11)16)21)26)65)70)74)82)87)91)129)134)138)1土3)1凌8)r、了吐、了.、‘r、矛‘、了吸、了官、J‘、了胜、护叮‘了、了叮、了‘、了胜、了.、(了‘1 1111122222233333152)193)196)199)204)210)214)257)262)267)矛矛几、矛r‘、矛.、‘r、了仁、尹t、J‘‘、fl‘、了几、几口44 4 4 4 4 la 55(272)(277)(281)(321)5弓56、.了、.2、、工、声‘1户、.,了、,产、.产、、了、.夕连0 4 8 2 la一匕吮jg六工J32 33 33 33 34 38 58 39 3940产.、夕‘.、了,、产亨.、护口气矛亨‘了.、产.、沙f、了.、6 6 6 6 6 7 7t了777 8 … 相似文献
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碳60的发现是荣获了1996年诺贝尔化学奖的重大贡献,将我们带进了又一个化学新世界。实践中碳60分了的独特构型引起了中学化学教师和学生的极大兴趣,但尚缺少其分了模型的简易制作方法。作者在教学过程中创造了一种碳60分了模型的制作方法。 相似文献
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β—环糊精和α—萘乙酸包络物的荧光光谱研究 总被引:5,自引:0,他引:5
本文研究了水溶液中β-环糊精和α-萘乙酸包络反应,研究了包络物的荧光光谱性质,测定了包络物的形成常数,讨论了各种水溶性一元醇对该包络物形成及荧光性质的影响,并对其应用了作了预测。 相似文献
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自20世纪初期,德国化学家EmilFischer首先合成了甘氨酸二肽片段,并第一次提出“peptide”(多肽)这一名词,多肽化学的研究已经历了100多年的发展.1953年,Vigneand小组首次完成了生物活性肽催产素的合成,并因此于1955年获得了诺贝尔化学奖.1963年,Merrifield提出了多肽固相合成法,并发明了第一台多肽自动合成仪,大大简化了多肽合成的流程、提高了合成的效率,从而促使多肽化学实现了飞跃式发展,Merrifield也因此获得了1984年诺贝尔化学奖.1965年,我国科学家完成了牛结晶胰岛素的合成, 相似文献
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《Photochemistry and photobiology》1984,39(1):123-124
Book reviewed in this article:
Picosecond Phenomena III. Edited by K. B. EISENTHAL, R. M. HOCHSTRASSER, W. KAISER and A. LAUBERAU. Springer Series in Chemical Physics, Vol. 23. Springer-Verlag, Berlin, 1982. 401 pp. 26.40.
Synthetic and Degradative Process in Marine Macrophytes. Edited by L. M. SRIVASTAVA. Walter de Gruyter, 1982. 296 pp.
Plants and The Daylight Spectrum. Edited by H. SMITH. Academic Press, London, 1981. 508 + xix pp. 45.50. 相似文献
Picosecond Phenomena III. Edited by K. B. EISENTHAL, R. M. HOCHSTRASSER, W. KAISER and A. LAUBERAU. Springer Series in Chemical Physics, Vol. 23. Springer-Verlag, Berlin, 1982. 401 pp. 26.40.
Synthetic and Degradative Process in Marine Macrophytes. Edited by L. M. SRIVASTAVA. Walter de Gruyter, 1982. 296 pp.
Plants and The Daylight Spectrum. Edited by H. SMITH. Academic Press, London, 1981. 508 + xix pp. 45.50. 相似文献
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Published enthalpy data for simple boron compounds, mostly containing trigonally-coordinated boron atoms, have been used to calculate bond enthalpy terms E(B-X), for their B-X bonds (X = N, O, F, Cl or Br) that vary with their bond order, n(B-X), according to the relationship E(B-X) = A[n(B-X)]m. Values of the constants A (the bond enthalpy term for a single bond) and m depend on X as follows:
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References
A. Finch and P.J Gardner Prog. Boron Chem. 3 (1969), p. 177.N.N. Greenwood In: A.F. Trotman-Dickenson, Editor, Comprehensive Inorganic Chemistry 1, Pergamon Press, Oxford (1973), p. 665.G.E. Coates, M.L.H. Green, P. Powell and K. Wade In: Principles of Organometallic Chemistry, Methuen, London (1971), p. 86.L. Pauling In: (3rd Edn ed.),Nature of the Chemical Bond, Cornell, New York (1970) Chap. 7 .W. Condy J. Chem. Phys. 15 (1947), p. 305.H.O. Jenkins J. Am. Chem. Soc. 77 (1955), p. 3168. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (0)J.C. Earl Tetrahedron 9 (1960), p. 65. Abstract | PDF (151 K) | View Record in Scopus | Cited By in Scopus (1)J.P. Fackler and D. Coucouvanis Inorg. Chem. 7 (1968), p. 181. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (0)A. Julg J. Chim. Phys. Physico-Chim. Biol. 65 (1968), p. 541.J. Stals Rev. Pure Appl. Chem. 20 (1970), p. 1.G. Haefelinger Tetrahedron 26 (1970), p. 2469.G. Haefelinger Chem. Ber. 103 (1970), p. 2902.G. Haefelinger Chem. Ber. 103 (1970), p. 2922.G. Haefelinger Chem. Ber. 103 (1970), p. 2941.G. Haefelinger Chem. Ber. 103 (1970), p. 3289.P.A. Koz'min Dokl. Akad. Nauk SSSR 206 (1972), p. 1384.C.E. Housecroft, K. Wade and B.C. Smith J. Chem. Soc. Chem. Comm. (1978), p. 765. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (1)C.E. Housecroft, K. Wade and B.C. Smith J. Organometal. Chem. 170 (1979), p. C1. Abstract | PDF (229 K) | View Record in Scopus | Cited By in Scopus (7)C.E. Housecroft and K. Wade Inorg. Nucl. Chem. Lett. 15 (1979), p. 339. Article | PDF (181 K) | View Record in Scopus | Cited By in Scopus (3)C.E. Housecroft, R. Snaith and K. Wade Inorg. Nucl. Chem. Lett. 15 (1979), p. 343. Article | PDF (180 K) | View Record in Scopus | Cited By in Scopus (1)J.A. Kerr and A.F. Trotman-Dickenson In: R.C. Weast and M.J. Astle, Editors, (59th Edn ed.),Handbook of Chemistry and Physics, Chemical Rubber Company, Cleveland, Ohio (1978-1979), pp. F–236.D.D. Wagman, W.H. Evans, V.B. Parker, I Halow, S.M. Bailey and R.H. Schumm In: Selected values of Thermodynamic Properties, U.S. Department of Commerce, Washington, D.C. (1968) National Bureau of Standards Technical Note 270-3 .J.D. Dill, P. von R. Schleyer and J.A. Pople J. Am. Chem. Soc. 97 (1975), p. 3402. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (53)M.J.S. Dewar and M.L. McKee J. Am. Chem. Soc. 99 (1977), p. 5231. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (61)J.B. Pedley and J. Rylance In: Sussex-N. P. L Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex (1977).J.A. Kerr and A.F. Trotman-Dickenson In: R.C. Weast and M.J. Astle, Editors, (59th Edn ed.),Handbook of Chemistry and Physics, Chemical Rubber Company, Cleveland, Ohio (1978-1979), pp. F–244.D.C. McKeen Chem. Soc. Rev. 7 (1978), p. 399.C.D. Good and D.M. Ritter J. Am. Chem. Soc. 84 (1962), p. 1162. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (17)H. Nöth and B. Wrackmeyer Nuclear Magnetic Resonance Spectroscopy of Boron Compounds, Springer, Heidelberg (1978).D.R. Stull and H. Prophet In: (2nd Edn ed.),JANAF Thermochemical Tables, U.S. Department of Commerce, Washington, D.C. (1971) NSRDS-NBS 37 .A. Sommer, D. White, M.J. Linevsky and D.R. Mann J. Chem. Phys. 38 (1963), p. 87. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (15)W. Weltner and J.R.W. Warn J. Chem. Phys. 37 (1962), p. 292. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (12)J.B. Holbrook Ph.D. Thesis, University of London (1975).B.C. Smith and L. Thakur Nature (London) 208 (1965), p. 74. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (0)B.C. Smith, L. Thakur and M.A. Wassef J. Chem. Soc. (A) (1967), p. 1616. Full Text via CrossRefM.V. Kilday, W.H. Johnson and E.J. Prosen J. Res. Nat. Bur. Stand. 65A (1961), p. 101. 相似文献13.
《Photochemistry and photobiology》1984,40(6):831-832
Edited by M. J. Clarke, P. Hemmerich, C. K. Jorgensen, J. B. Goodenough, J. A. Ibers, J. B. Neilands, D. Reinen, R. Weiss and R. J. P. Williams, Springer-Verlag, Berlin 相似文献
14.
Combinations of flow-injection techniques with flame atomic absorption spectrometry (a.a.s.) and inductively-coupled plasma/atomic emission spectrometry (i.c.p./a.e.s.) are reviewed in the general context of agricultural and environmental analysis. The flow-injection systems are valuable for sample introduction; appropriate dispersion control allows the analysis of solutions containing as much as 40% (w/v) urea or phosphate in fertilizers. A study on the determination of cadmium in soil extracts by on-line ion-exchange preconcentration and flame a.a.s. detection is described. The interpolative standard-addition method with i.c.p./a.e.s. detection is outlined. Improvements in the determinations of selenium in environmental samples by hydride-generation a.a.s. and of mercury by cold-vapour a.a.s. are reported. 相似文献
15.
Separation of biopolymers is an obvious application of capillary electrochromatography (CEC) technology, since speed and resolution should increase significantly over high-performance liquid chromatography (HPLC). All too often, HPLC chromatograms of polymers show poorly resolved envelopes of overlapping peaks from oligomers. The practical limitation of column length and pressure drop has hindered development of high resolution separations of many polymers in HPLC. However, this generally applies only to packed beds of small particles, and not to continuous (or monolithic) beds, as introduced by Hjerten et al. [S. Hjerten, Ind. Eng. Chem. Res. 38 (1999) 1205; S. Hjerten, C. Ericson, Y.-M. Li, R. Zhang, Biomed. Chromatogr. 12 (1998) 120; C. Ericson, S. Hjerten, Anal. Chem. 71 (1999) 1621; J.-L. Liao, N. Chen, C. Ericson, S. Hjerten, Anal. Chem. 68 (1996) 3468; S. Hjerten, A. Vegvari, T. Srichaiyo, H.-X. Zhang, C. Ericson, D. Eaker, J. Capillary. Elec. 5 (1998) 13; C. Ericson, J.-L. Liao, K. Nakazato, S. Hjerten, J. Chromatogr. A 767 (1997) 33; S. Hjerten, D. Eaker, K. Elenbring, C. Ericson, K. Kubo, J.-L. Liao, C.-M. Zeng, P.-A. Lidstrom, C. Lindh, A. Palm, T. Srichiayo, L. Valtcheva, R. Zhang, Jpn. J. Electroph. 39 (1995) 1]. Throughout this review we will refer to such packings as monolithic or continuous beds, but they are identical type packings, formed by the in situ polymerization in the capillary or column. CEC capillaries can be much longer, and contain smaller particles than is practical for HPLC. This improves resolution significantly. CEC is able to capitalize on existing mobile phase technology developed over 30 years to improve separations. The requirement that the mobile phase simultaneously promote the separation and mobile phase mobility needs to be considered. In RPLC, this dual role is not much of a problem. It may be much more important in other modes, particularly ion-exchange (IEC). As the field develops, it is becoming clear that CEC is not just a simple extension of HPLC. Instruments, column technology and operating optima are clearly different than HPLC. CEC will develop into its own unique field. Open tubular HPLC is almost precluded by the high pressures required for forcing liquids through 10 microm or smaller capillaries. Electroosmotic pumping (EOF) avoids the pressure constraints and provides better flow profiles. Compared to HPCE, the ability to interact with the stationary phase may enable separations that would be difficult with electrophoresis alone. Since the mobile phase can be less complex than micellar electrokinetic chromatography (MEKC), CEC also avoids the problem of high background signals from the micelle forming compounds. Thus CEC-MS (mass spectrometry) is expected to be even more powerful than HPCE-MS. The fortuitous, simultaneous development of matrix assisted laser desorption-time of flight MS (MALDI-TOF-MS) technology will enable extension of the mass range to above 100 000 Da. Lack of familiarity is the perhaps the largest liability of CEC compared to other techniques. This paper critically compares the state-of-the-art of CEC with HPLC and HPCE, with a particular emphasis on separation of biopolymers. The goal is to help the reader overcome the fear of the unknown, in this case, CEC. 相似文献
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H. G. McAdie 《Fresenius' Journal of Analytical Chemistry》1967,231(1):36-38
Ohne ZusammenfassungDie Mitglieder des Standardisierungskomitees der ICTA: Prof. C. Mazières (Frankreich); Prof. T. Sudo (Japan); R. S. Forsyth (Schweden); H. G. Wiedemann (Schweiz); Dr. I. S. Rassonskaya (UdSSR); C. J. Keattch (Großbritannien) und Dr. P. D. Garn (USA). Andere Delegierte des Komitees: Prof. L. G. Berg (UdSSR); Dr. R. C. Mackenzie (Großbritannien); Dr. J. P. Redfern (Großbritannien) und Dr. S. Gordon (USA). Der Vorsitzende: Dr. H. G. McAdie (Canada). 相似文献
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《Photochemistry and photobiology》1977,26(6):691-693
Book reviewed in this article:
The Eye. Edited by H. Davson.
Radiation Research — Biochemical. Chemical ond Physical Perspectives . Edited by O. F. Nygaard, H. I. Adler and W. K. Sinclair. 相似文献
The Eye. Edited by H. Davson.
Radiation Research — Biochemical. Chemical ond Physical Perspectives . Edited by O. F. Nygaard, H. I. Adler and W. K. Sinclair. 相似文献
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《Photochemistry and photobiology》1981,34(6):795-795
Book reviewed in this article:
Luminescence from Biological and Synthetic Macromolecules , ( Ann. N Y Acad. Sci. 366 , 1981) Edited by H. M orawetz and I. Z. S teineerg .
Lasers in Photomedicine and Photobiology , Proceedings of the European Physical Society. Quantum Electronics Division. Conference. Florence, Italy. September 3–6, 1979. Edited by R. P ratesi and C. A. S acchi. 相似文献
Luminescence from Biological and Synthetic Macromolecules , ( Ann. N Y Acad. Sci. 366 , 1981) Edited by H. M orawetz and I. Z. S teineerg .
Lasers in Photomedicine and Photobiology , Proceedings of the European Physical Society. Quantum Electronics Division. Conference. Florence, Italy. September 3–6, 1979. Edited by R. P ratesi and C. A. S acchi. 相似文献
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《Photochemistry and photobiology》1985,41(2):233-234
Book reviewed in this article:
DNA Repair. A Laboratory Manual of Research Procedures. Vol. 2. Edited by E. C. F riedberg and P. C. H anawalt , Marcel Dekker,
Nucleic Acids: The Vectors of Life. Edited by B. P ullman and J. J ortner , D. Reidel Publishing Company,
Specialist Periodical Reports. Volume 13. Photochemistry. Edited by D. Bryce-Smith (University of Reading). 相似文献
DNA Repair. A Laboratory Manual of Research Procedures. Vol. 2. Edited by E. C. F riedberg and P. C. H anawalt , Marcel Dekker,
Nucleic Acids: The Vectors of Life. Edited by B. P ullman and J. J ortner , D. Reidel Publishing Company,
Specialist Periodical Reports. Volume 13. Photochemistry. Edited by D. Bryce-Smith (University of Reading). 相似文献
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《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2023,135(1):e202214918
This invited Team Profile was created by the above group. They recently published an article on the introduction of a hybrid separation technique, referred to as Dual-Gradient Unified Chromatography (DGUC), enabling simultaneous multicomponent analysis of both small and large molecules across a wide polarity range in single experimental runs. DGUC lays the foundation for the next generation of hybrid chromatographic techniques with the deployment of universal elution profiles obtained via multi-eluent blending beyond traditional separation modes. “Dual-Gradient Unified Chromatography: A New Paradigm for Versatility in Simultaneous Multicomponent Analysis”, G. L. Losacco, R. Bennett, I. A. Haidar Ahmad, R. C. Barrientos, J. O. DaSilva, Y. Dong, A. W. Schuppe, Z. Wang, S. Aiken, I. Mangion, V. K. Aggarwal, E. L. Regalado, Angew. Chem. Int. Ed . 2022, e202208854 ; Angew. Chem . 2022, e202208854 . 相似文献