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71.
72.
H. Jensen O. Schales W. Zimmermann M. J. Schmulowitz H. B. Wylie G. Pincus G. Wheeler G. Young P. A. Zahl S. L. Cohen G. F. Marrian G. F. Castland R. K. Meyer L. C. Miller M. H. Ritz S. Goertz K. David R. Wagner J. P. Visscher D. E. Bowman C. Dolff E. Wiesener S. Aschheim B. Zondek B. Ostadal K. J. Anselmino Friedrich Hoffmann W. Kestraneck H. Molitor E. P. Pick I. A. Smorodinzew A. M. Feldt W. W. Palmer J. P. Leland A. B. Gutmann G. L. Foster V. Trevorrow G. J. Fashena J. Devine K. Bhagvat H. Blaschko D. Richter H. Schlossmann S. J. Meltzer C. M. Auer J. M. Rogoff 《Analytical and bioanalytical chemistry》1942,123(1-2):71-77
73.
D. Balarew W. Jones H. Kleinmann G. Vecchi H. Copaux A. Villiers Fr. Borg J. Chr Marignac E. Drechsel H. St. Raper W. Muthman A. E. Taylor C. W. Miller P. Melikow M. Becaia M. Wagenaar F. Glase L. Bauzil Pincus P. v. Liebermann A. E. Stearn H. V. Farr N. P. Knowlton J. M. Kolthoff J. Rosin F. W. Bury W. Heubner H. J. Hamburger F. L. Hibbard A. Sato G. Misson E. Riegler Hsein Wu und L. Losana 《Fresenius' Journal of Analytical Chemistry》1924,64(7):274-288
Ohne Zusammenfassung 相似文献
74.
We discuss the effects of the solvent composition on the helix-coil transition of a polypeptide chain. We use a simple model
to demonstrate that improving the hydrogen-bonding ability of the solvent can make the transition less cooperative, without
affecting the transition temperature. This effect is very different from other solvent effects which primarily influence the
melting transition rather than the cooperativity.
Received 10 December 2001 and Received in final form 22 March 2002 相似文献
75.
Umar Rashid Elarbi Chatir Leonardo Medrano Sandonas PA Sreelakshmi Arezoo Dianat Rafael Gutierrez Gianaurelio Cuniberti Saioa Cobo Veerabhadrarao Kaliginedi 《Angewandte Chemie (International ed. in English)》2023,62(16):e202218767
By employing a mechanically controllable break junction technique, we have realized an ideal single molecular linear actuator based on dithienylethene (DTE) based molecular architecture, which undergoes reversible photothermal isomerization when subjected to UV irradiation under ambient conditions. As a result, open form (compressed, UV OFF) and closed form (elongated, UV ON) of dithienylethene-based molecular junctions are achieved. Interestingly, the mechanical actuation is achieved without changing the conductance of the molecular junction around the Fermi level over several cycles, which is an essential property required for an ideal single molecular actuator. Our study demonstrates a unique example of achieving a perfect balance between tunneling width and barrier height change upon photothermal isomerization, resulting in no change in conductance but a change in the molecular length, which results in mechanical actuation at the single molecular level. 相似文献
76.
We report on a molecular simulation method, which captures the self-assembly of cationic lipid-DNA (CL-DNA) gene delivery complexes. Computational efficiency required for large length- and time-scale simulations is achieved through a coarse-grained representation of the intramolecular details and via intermolecular potentials, which effectively mimic the hydrophobic effect without an explicit solvent. The broad utility of the model is illustrated by demonstrating excellent agreement with x-ray diffraction experimental data for the dependence of the spacing between DNA chains on the concentration of CLs. At high concentrations, the large electrostatic pressure induces the formation of pores in the membranes through which the DNA molecules may escape the complex. We relate this observation to the origin of recently observed enhanced transfection efficiency of lamellar CL-DNA complexes at high charge densities. 相似文献
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78.
Approximate entropy (ApEn) as a complexity measure 总被引:1,自引:0,他引:1
Pincus S 《Chaos (Woodbury, N.Y.)》1995,5(1):110-117
Approximate entropy (ApEn) is a recently developed statistic quantifying regularity and complexity, which appears to have potential application to a wide variety of relatively short (greater than 100 points) and noisy time-series data. The development of ApEn was motivated by data length constraints commonly encountered, e.g., in heart rate, EEG, and endocrine hormone secretion data sets. We describe ApEn implementation and interpretation, indicating its utility to distinguish correlated stochastic processes, and composite deterministic/ stochastic models. We discuss the key technical idea that motivates ApEn, that one need not fully reconstruct an attractor to discriminate in a statistically valid manner-marginal probability distributions often suffice for this purpose. Finally, we discuss why algorithms to compute, e.g., correlation dimension and the Kolmogorov-Sinai (KS) entropy, often work well for true dynamical systems, yet sometimes operationally confound for general models, with the aid of visual representations of reconstructed dynamics for two contrasting processes. (c) 1995 American Institute of Physics. 相似文献
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