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Electronic properties of the 1D Frenkel-Kontorova model.

Physical review letters

Tong P, Li B, Hu B.
PMID: 11801152
Phys Rev Lett. 2002 Jan 28;88(4):046804. doi: 10.1103/PhysRevLett.88.046804. Epub 2002 Jan 14.

The energy spectra and quantum diffusion of an electron in a 1D incommensurate Frenkel-Kontorova model are studied numerically. We found that the spectral and dynamical properties of an electron display quite different behaviors in the invariance circle regime and...

Catalytic asymmetric coupling of 2-naphthols by chiral tridentate oxovanadium (IV) complexes.

Organic letters

Hon SW, Li CH, Kuo JH, Barhate NB, Liu YH, Wang Y, Chen CT.
PMID: 11263903
Org Lett. 2001 Mar 22;3(6):869-72. doi: 10.1021/ol015505o.

A series of chiral oxovanadium(IV) complexes derived from tridentate N-3,5-substituted and N-3,4-benzo- and N-5,6-benzo-salicylidene-alpha-amino acids can serve as efficient catalysts for the enantioselective oxidative couplings of various 3-, 6-, and 7-substituted 2-naphthols under O(2). The best scenario involves the...

Synthesis and molecular recognition of novel oligo(ethylenediamino) bridged bis(beta-cyclodextrin)s and their copper(II) complexes: enhanced molecular binding ability and selectivity by multiple recognition.

Chemistry (Weinheim an der Bergstrasse, Germany)

Liu Y, You CC, Li B.
PMID: 11322555
Chemistry. 2001 Mar 16;7(6):1281-8. doi: 10.1002/1521-3765(20010316)7:6<1281::aid-chem1281>;2-h.

Four bridged bis(beta-cyclodextrin)s tethered by different lengths of oligo(ethylenediamine)s have been synthesized and their inclusion complexation behavior with selected substrates elucidated by circular dichroism spectroscopy and fluorescence decay. In order to study their binding ability quantitatively, inclusion complexation stability...

[The Immunological Study of Megakaryocytes].

Zhongguo shi yan xue ye xue za zhi

Yang M, Li K, Chik KW, Zhao DC, Yan M, Li CK, Shing MM, Fok TF, Yuen PM.
PMID: 12578710
Zhongguo Shi Yan Xue Ye Xue Za Zhi. 2000 Mar;8(1):5-9.

The immunological role of megakaryocytes is not well known. This project studies the involvement of megakaryocytes on immuno-inflammatory processes and the possible mechanism via the adhesion molecule CD36 and the synthesis of relevant cytokines. The expression of adhesion protein...

The Barbier-Grignard-type carbonyl alkylation using unactivated alkyl halides in water.

Journal of the American Chemical Society

Keh CC, Wei C, Li CJ.
PMID: 12670223
J Am Chem Soc. 2003 Apr 09;125(14):4062-3. doi: 10.1021/ja029649p.

The aqueous Barbier-Grignard-type alkylation of aldehydes with unactivated alkyl iodides and bromides was developed. By using a combination of zinc and cuprous iodide, catalyzed by indium(I) chloride, we successfully added tertiary, secondary, and primary alkyl halides to various aromatic...

Free-standing single crystal silicon nanoribbons.

Journal of the American Chemical Society

Shi W, Peng H, Wang N, Li CP, Xu L, Lee CS, Kalish R, Lee ST.
PMID: 11686728
J Am Chem Soc. 2001 Nov 07;123(44):11095-6. doi: 10.1021/ja0162966.

No abstract available.

Ultraviolet Photoprocessing of Interstellar Dust Mantles as a Source of Polycyclic Aromatic Hydrocarbons and Other Conjugated Molecules.

The Astrophysical journal

Greenberg JM, Gillette JS, Muñoz Caro GM, Mahajan TB, Zare RN, Li A, Schutte WA, de Groot M, Mendoza-Gómez C.
PMID: 10673417
Astrophys J. 2000 Mar 01;531(1):L71-L73. doi: 10.1086/312526.

By co-depositing a gas mixture of simple carbon- and nitrogen-containing molecules with water on a 10 K surface and exposing it to ultraviolet radiation, we were able to form a residue. This residue was then placed aboard the EURECA...

Relative Effects of alpha- and gamma-Tocopherol on Low-Density Lipoprotein Oxidation and Superoxide Dismutase and Nitric Oxide Synthase Activity and Protein Expression in Rats.

Journal of cardiovascular pharmacology and therapeutics

Li D, Saldeen T, Romeo F, Mehta JL.
PMID: 10684543
J Cardiovasc Pharmacol Ther. 1999 Oct;4(4):219-226. doi: 10.1177/107424849900400403.

BACKGROUND: Increasing evidence suggests that vitamin E prevents the progression of atherosclerosis by inhibiting platelet aggregation, monocyte adhesion, and improving plaque stability and vasomotor function. Recently, controversy has arisen as to the relative effects of alpha- and gamma-tocopherol in...

[The Comparison between the Killing Effects of Two Anti-T Immunotoxins on Target Cells].

Zhongguo shi yan xue ye xue za zhi

Li Y, Lai C, Pei W, He Y, Sun Y, Shen B, Chen X, Jin L, Kong F.
PMID: 12578684
Zhongguo Shi Yan Xue Ye Xue Za Zhi. 2000 Sep;8(3):205-210.

The key to killing target cells by immunotoxin depends on the specific recognition of antibody to target cell and the cytotoxic effect of toxin. The comparative study of the killing effects of two anti-T immunotoxins, CD5:Ricin and CD5:rRA, on...

[Separation and analysis of amino acids in secretion of psylla chinesis yang et li].

Se pu = Chinese journal of chromatography

Liu J, Zhou H, Zhou Q, Li D, Zhang C, Xu G.
PMID: 12552857
Se Pu. 1999 Jul;17(4):383-5.

We used ion-exchange resin column chromatography to separate amino acids in secretion of Psylla Chinese Yang et Li and used capillary gas chromatography to analysis n-butyl-N-trifluoracetyl derivatives of the amino acids. Qualitative analysis was done by comparing with the...

[Instrumental analysis and systematic investigation on heavy oils from coal. II. Analysis of aromatic ring distribution by high performance liquid chromatography].

Se pu = Chinese journal of chromatography

Zhang C, Li A, Li Y, Zhang L.
PMID: 12552887
Se Pu. 1999 Sep;17(5):473-6.

In this paper, the relationship of chromatographic retention index (I) and aromatic ring number (ARN) of 49 pure reagents in Zorbax-NH2 column/hepatane chromatographic system using high performance liquid chromatography(HPLC) have been studied. The results obtained were that log I...

An Improved Method of Determining the zeta-Potential and Surface Conductance.

Journal of colloid and interface science

Erickson D, Li D, Werner C.
PMID: 11071749
J Colloid Interface Sci. 2000 Dec 01;232(1):186-197. doi: 10.1006/jcis.2000.7153.

In the classical "slope-intercept" method of determining the zeta potential and the surface conductance, the relationship between DeltaP and E(s) is measured experimentally at a number of different channel sizes (e.g., the height of a slit channel, h). The...

Showing 13 to 24 of 47520 entries