A ligand-chirality controlled supramolecular hydrogel

We report a novel example of ligand-chirality finely controlled in situ supramolecular hydrogel formation based on the coordination of phenylalanine (Phe) to Cu(II) with higher selectivity over other metal ions. As decreasing both enantiomeric excesses (ee%) of ligand Phe towards its D-and L-forms, the gelation ability of Phe-Cu(II) supramolecular metallogelator was found to be weakened and eventually disappeared, which likely resulted from the stereoselectivity of the ligand Phe. Intermolecular hydrogen bonding, hydrophobic and/or pi-pi stacking interactions were also found to be essential for forming the metallogel. We believe that the present work can open up a new entry for developing novel and promising chiral sensing and recognition platforms, i.e. visually sensing chiral molecules by naked eyes due to the feature of a sol-to-gel transition induced smartly by varying the ligand chirality.CAS [09i4281c10]; NSF of China [20835005

Anion-triggered melamine based self-assembly and hydrogel

We found that melamine in its protonated form could be triggered by oxoanions such as NO3-, PO43-, ATP, and SO42- to form superstructures and to gelate a large amount of water molecules, presumably resulting from the electrostatic and hydrogen bonding interactions operating in a synergistic manner; the gelation can be reversibly switched off/on by increasing/decreasing pH or temperature.CAS [09i4281c10]; NSF of China [20835005

A ratiometric luminescent sensing of Ag(+) ion via in situ formation of coordination polymers

A ratiometric luminescent sensing of Ag(+) ion is developed via the Ag(I)-NCys coordination polymeric luminophore in situ formed in aqueous solution upon mixing Ag(+) ion with the designed fluorescent thiol ligand NCys.NSF of China[20835005, J1030415]; MOST of China[2011CB910403

Rich and poor cities. U.S. and West German cities compared by fiscal condition and its private and private sector determinants Project report

SIGLEBibliothek Weltwirtschaft Kiel C131,369 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Sensitive and Versatile Detection of the Fouling Process and Fouling Propensity of Proteins on Polyvinylidene Fluoride Membranes via Surface-Enhanced Raman Spectroscopy

Membrane fouling is the major drawback of membrane-based technologies because it will lead to severe flux declines and the need to clean or replace the fouled membrane. A technique capable of early diagnosis, process monitoring, and evaluation of the role of different foulants playing in the fouling process is crucial for the fouling control. We develop surface-enhanced Raman spectroscopy (SERS) as a new and versatile tool to investigate the fouling process of protein on PVDF (polyvinylidene fluoride) membranes as well as the fouling propensity of three different proteins. We optimized the aggregation level and volume of SERS-active Ag sol and the spectra acquisition method combined with a statistical analysis method to ensure a high detection sensitivity, signal uniformity, and stability. We then used SEAS for the early diagnosis of the fouling process and determining when the membrane pores would be blocked. The fouled area was visualized by a combination of the silver staining and Raman mapping. The fouling propensity of different proteins was studied by comparing the relative SERS band intensities of different proteins on a glass slide and after membrane filtration. Compared with fluorescence-based techniques, the narrow, well-resolved Raman band, especially the use of the same excitation line and laser power, endows SEAS the ability to compare the fouling propensity in a very simple way.National Natural Science Foundation of China[20903076]; Natural Science Foundation of Fujian Province[2009J05032]; Chinese Academy of Science[KZCX2-YW-452

A wavelet-Galerkin algorithm for the driven-cavity-Stokes-problem in two space dimensions

In this paper we derive a algorithm for solving the Stokes-equations for the example of the Driven-Cavity-Problem. We treat the Stokes-equations in the divergence-free weak formulation and show the construction of divergence-free refinable functions, which will be used as trial functions in the Galerkin-method. The system will be solved by means of the preconditioned cg-method. We make use of multilevel preconditioning strategies to obtain uniformly bounded condition numbers. (orig.)SIGLEAvailable from TIB Hannover: RN 8680(106) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Urban renaissance? The arts and urban regeneration process in 1980s Britain

SIGLEAvailable from British Library Document Supply Centre-DSC:9349.2352(7) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Key issues for sustainable communities

SIGLEAvailable from British Library Document Supply Centre-DSC:m00/35702 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Untersuchung des Schwingungsverhaltens bestrahlungsinduzierter Zwischengitteratome in Al mit Hilfe der inelastischen, diffusen Neutronenstreuung

SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Neue Verfahren und Methoden zur Sicherung und Sanierung von Altlasten am Beispiel der Deponie Gerolsheim. Teilprojekt 2.1 Auswahl und Optimierung geeigneter Oberflaechenabdichtungssysteme gegen Regenwasserzutritte und Gasemissionen innerhalb des integrierten uebertragbaren Forschungs- und Entwicklungsprogramms zur Sicherheit der Sanierung von Sondermuelldeponien am Beispiel der Sondermuelldeponie Gerolsheim/Rheinland-Pfalz. Begleitstudie

SIGLEAvailable from TIB Hannover: QN 104 (Beg 2.1)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman