Responsive glyco-poly(2-oxazoline)s: synthesis, cloud point tuning, and lectin binding

A new sugar-substituted 2-oxazoline monomer was prepared using the copper-catalyzed alkyne-azide cycloaddition (CuAAC) reaction. Its copolymerization with 2-ethyl-2-oxazoline as well as 2-(dec-9-enyl)-2-oxazoline, yielding well-defined copolymers with the possibility to tune the properties by thiol-ene "click" reactions, is described. Extensive solubility studies on the corresponding glycocopolymers demonstrated that the lower critical solution temperature behavior and pH-responsiveness of these copolymers can be adjusted in water and phosphate-buffered saline (PBS) depending on the choice of the thiol. By conjugation of 2,3,4,6-tetra-O-acetyl-1-thio-beta-D-glucopyranose and subsequent deprotection of the sugar moieties, the hydrophilicity of the copolymer could be increased significantly, allowing a cloud-point tuning in the physiological range. Furthermore, the binding capability of the glycosylated copoly(2-oxazoline) to concanavalin A was investigated

Validation of a Laser Source for Gravitational Waves Space Detectors

J.Physique IV, 1, pp. , 2003, 2003International audienc

A flexible framework for mobile device forensics based on cold boot attacks

Mobile devices, like tablets and smartphones, are common place in everyday life. Thus, the degree of security these devices can provide against digital forensics is of particular interest. A common method to access arbitrary data in main memory is the cold boot attack. The cold boot attack exploits the remanence effect that causes data in DRAM modules not to lose the content immediately in case of a power cut-off. This makes it possible to restart a device and extract the data in main memory. In this paper, we present a novel framework for cold boot-based data acquisition with a minimal bare metal application on a mobile device. In contrast to other cold boot approaches, our forensics tool overwrites only a minimal amount of data in main memory. This tool requires no more than three kilobytes of constant data in the kernel code section. We hence sustain all of the data relevant for the analysis of the previously running system. This makes it possible to analyze the memory with data acquisition tools. For this purpose, we extend the memory forensics tool Volatility in order to request parts of the main memory dynamically from our bare metal application. We show the feasibility of our approach on the Samsung Galaxy S4 and Nexus 5 mobile devices along with an extensive evaluation. First, we compare our framework to a traditional memory dump-based analysis. In the next step, we show the potential of our framework by acquiring sensitive user data

The (X)over-tilde B-2(1), B-2(2), (2)A(1), and (2)A(2) states of oxygen difluoride cation (F2O+): High-level ab initio calculations and simulation of the ultraviolet photoelectron spectrum of F2O

The ultraviolet photoelectron spectrum of F2O was recorded with a higher resolution than previously published. New vibrational structure was observed in the second and third bands. Near state-of-the-art molecular orbital calculations were performed on the (X) over tilde (1)A(1) state of F2O and the (X) over tilde B-2(1), B-2(2), (2)A(1), and (2)A(2) state of F2O+, and their potential energy functions were computed. Spectral simulations based on Franck-Condon factor calculations including the Duchinsky effect were carried out within the harmonic oscillator model and also with the inclusion of anharmonicity, in order to assist spectral assignment. Based on the computed ionization energies obtained with the coupled cluster and multireference configuration interaction methods with basis sets of up to quintuple zeta quality, the order of the low-lying cationic states of F2O+ has been firmly established. However, the detailed assignment of the overlapping second and third photoelectron bands was only achieved with the aid of spectral simulation. The iterative Franck-Condon analysis (IFCA) procedure was carried out for the first band {F2O+ ((X) over tilde B-2(1))&lt;--F2O ((X) over tilde (1)A(1))} in the photoelectron spectrum. With the geometrical parameters of F2O ((X) over tilde (1)A(1)) being fixed at the available experimental values, geometrical parameters of the (X) over tilde B-2(1) state of F2O+ were derived. Based on anharmonic Franck-Condon factor calculations, the recommended IFCA geometrical parameters for the ground state of F2O+ are R(FO) = 1.323 +/-0.002 Angstrom and angle FOF=107.3 +/-0.2 degrees. <br/

Produktionsintegrierter Umweltschutz im Bereich des Hochbaus der Beton- und Fertigteilindustrie - Projekt PRODOMO. Bd. 6: Arbeitspaket 9: Erarbeitung eines Systems der Kennzeichnung der Fertigteilprodukte zur Einstufung der Wiederverwendbarkeit bzw. recyclinggerechten Aufbereitung (Produkt-Infocode) Ermittlung von Einfluessen auf die Lesbarkeit des Infocode-Chips bei Verwendung von Betonfertigteilen. Analyse, Bewertung und Experimentelle Erprobung von Systemen der Identifikation von Fertigteilen. Praktische Anwendung neuartiger Verbindungsmittel und Integration des Infocode-Chips in das Bauteil. Bericht ueber die Erprobung an einem Experimental-Skelettbau. Kraftuebertragung in Fugen von Deckenscheiben aus Fertigteilen

Available from TIB Hannover: QN 441(6) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung und Forschung, Berlin (Germany)DEGerman