Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Two metal–organic coordination polymers, [Ag2(imdt)3(OAc)2] n (1) (imdt = 1,3-imidazolidine-2-thione, OAc = CH3COO−) and [Ag(imdt)Cl] n (2), were synthesized under similar conditions by using Et3N (triethylamine) as buffering agent. X-ray diffraction shows that 1 crystallizes in the monoclinic system, C2 /c space grou…
The crystal structure and vibrational spectrum of kanemite $({\text{NaHSi}}_{2}{\text{O}}_{5}\ensuremath{\cdot}3{\text{H}}_{2}\text{O})$ were studied using the density-functional theory. The calculations were carried out in a lower space group $(Pna{2}_{1})$ in order to eliminate the finite-temperature disordered conf…
Abstract Licht steuert Fließverhalten: Morphologie und rheologische Eigenschaften eines flüssigkristallinen Systems können nach Anbringen photoresponsiver flüssigkristalliner Einheiten an ein Siloxanpolymer durch UV‐Bestrahlung dynamisch manipuliert werden. Die Anregung mit UV‐Licht induziert einen Konformationswechse…
In this study, 290� non-Escherichia coli Enterobacteriasea that were isolated from environmental and clinical specimen, were sent to the laboratory for examination with routine microbiological tests for identification of isolates. After identification, non-E. coli isolates were inspected by PCR for existence of penici…
Abstract Die bevorzugte Kristallisation bietet die Möglichkeit einer effizienten Racemattrennung durch Kristallisation. In jüngerer Zeit wurden verschiedene neuartige polytherme Varianten des Prozesses unter Erzeugung von Impfkristallen im Kristallisator (autoseeded) untersucht [1]. Am Beispiel des Stoffsystems DL‐Thr…
Photoabsorption and the subsequent decay processes of Cr, Mn and Fe atoms have been studied for the 3s-excitation region using a charge-separated-photoion-yield method combined with monochromatized synchrotron radiation. Two weak peak-type features, which can be attributed to the first members of 3s−1np resonance exci…
Abstract It has been hypothesized that four parameters are solely responsible for a material's performance in a flammability scenario. This excludes effects of material physical integrity, i.e. melting, delamination, etc. They are (1) the critical heat flux below which piloted ignition cannot occur (CHF), (2) the rati…
High styrene rubber (HSR)/styrene butadiene rubber (SBR) blends at different ratios were exposed to various doses of electron beam irradiation. The effect of irradiation dose and blend ratios on the mechanical properties and shape memory characteristics in terms of strain fixation) rate (Rf) and strain recovery rate (…
We describe magneto-optical and magnetic properties of quaternary Cd1−x−yMnxCryTe crystals (x=0.37, 0≤y≤0.03) grown by the Bridgman method. The presence of Cr in this alloy is observed to induce ferromagnetic behavior and to enhance magneto-optical effects. Using magnetic circular dichroism and magnetization measureme…
We generate two-dimensional Lennard-Jones networks with random topology by preparing a perfect four-functional network of identical harmonic springs and randomly cutting some of the springs. Using molecular-dynamics simulations we find that the fraction p of active springs affects both the temperature of phase separat…
Optical modal gain enhancement of CdSe nanocrystal quantum dots in a cylindrical glass-waveguide has been observed by using a variable stripe length method. While poor modal gain was observed near the threshold excitation energy (3.5 mJ) for a thin film structure, significant modal gain (∼ 500 cm −1 ) was seen in the…
Abstract Nach dem Rezept der Natur: Eine theoretische Studie analysiert, wie die Umgebung des katalytischen Cofaktors der [FeFe]‐Hydrogenase dessen chemische Eigenschaften beeinflusst, insbesondere die relative Stabilität von Komplexen mit verbrückenden und terminalen Hydridliganden (siehe Bild; Fe türkis, S gelb, C g…
Complete mineralization of phenol has been achieved over a cerium-manganese catalyst, doped with potassium, supported on a modified zeolite with a high surface area, under very mild conditions (110 degrees C, P(O2) = 0.5 MPa). This newly developed supported catalyst restricts the formation of bulk polymeric species on…
Isopropoxy- and tert-butoxy-tris(dithiocarbamato)titanium(IV) complexes of five dithiocarbamate ligands were prepared and characterized by LDI-MS, (1)H NMR, (13)C NMR, and elemental analysis, as well as by crystallographic determination of two examples. Both showed strongly pi-coordinated alkoxy groups and two separat…
SCC VII tumor-bearing mice were continuously given 5-bromo-2'-deoxyuridine (BrdU) to label all intratumor proliferating (P) cells. They received hexamethylenetetramine (HMTA) either once intraperitoneally or continuously subcutaneously together with chemotherapy using intraperitoneally administered free doxorubicin (D…
We present structural and magnetic data of a new Cu(2+)(S = 1/2)-containing magnetic trimer system 2b·3CuCl(2)·2H(2)O (b = betaine, C(5)H(11)NO(2)). The trimers form a quasi-2D quantum spin system with an unusual intra-layer exchange coupling topology, which, in principle, supports diagonal four-spin exchange. To desc…
Focused laser light in an aqueous solution of silver nitrate and disodium citrate allowed the synthesis and immobilization of single Ag particles on a glass surface. The as-synthesized Ag particles were free from aggregation. Rayleigh scattering spectra of the Ag particles showed a plasmon resonance band at ∼490 nm. A…
We report the structural and optical properties of one-dimensional grating of ZnO consisting of periodically polarity inverted structures on (0001) Al2O3 substrates. The inversion domain boundaries (IDBs) between the Zn- and the O-polar ZnO regions were clearly observed by transmission electronic microscopy. The inves…
The interplay between inter-granular transport and quantum corrections to low temperature transport properties of La(0.67)Sr(0.33)MnO(3) (LSMO) and Nd(0.67)Sr(0.33)MnO(3) (NSMO) thin films has been discussed. All the samples exhibit characteristics of renormalized electron-electron interaction in two dimensions. The c…
We show a simple variant on Eigen's familiar temperature-jump method to measure rate constants. The sample is prepared in a sealed NMR tube, which is heated and then abruptly cooled. The NMR spectrum is then taken repeatedly until equilibrium is reestablished at the new temperature. The sample can be used over and ove…