Magnetic field decoupling experiments in NO2

Magnetic field decoupling experiments in the optically excited states of NO₂ yield decoupling signals with a width of 10 to 40 mG. We attribute these signals to the non-rigidity of the excited molecule.     

Enhanced quantum correlations in bound higher-order solitons

Quantum effects in N-bound solitons can be drastically enhanced compared to the fundamental soliton. In particular, the spectral photon-number correlations are much stronger. The formation of spectral domains of almost perfect positive and negative correlations is predicted. Criteria that are based on the Cauchy-Schwarz inequality are used for studying nonclassical correlations. Interferences between different soliton components of the N-bound solution being responsible for the strong changes in the coherent amplitude may also be a mechanism for the strong correlations. The results offer novel possibilities of producing light with highly nonclassical properties.     

Enzymatic modification of lignocellulosic substances for the production of fiberboards

The object of the research is the development of enzyme systems for the enzymatic modification of wood fiber materials as well as fiber materials from annual plants for the production of glue-free fiberboards. The project is aimed first at the process development for the enzymatic modification and second at the development of cellulase/hemicellulase complexes on the basis of stillage as a substrate and inducer for the enzymatic modification. The results demonstrate that it is possible to substitute synthetic resins by means of activation and biocatalytic cross-linking of fibers with hydrolytic enzyme systems, in particular, for the production of medium-density fiberboards. The article is published in the original.     

Real-time renormalization group and charge fluctuations in quantum dots

We develop a perturbative renormalization-group method in real time to describe nonequilibrium properties of discrete quantum systems coupled linearly to an environment. We include energy broadening and dissipation and develop a cutoff-independent formalism. We present quantitatively reliable results for the linear and nonlinear conductance in the mixed-valence and empty-orbital regime of the nonequilibrium Anderson impurity model with finite on-site Coulomb repulsion.     

用OH-PLIF研究浮力对预混V形火焰的作用

在火焰和流动相互作用中,浮力是火焰影响流场的因素致一。研究浮力的作用有助于深入了解湍流燃烧的机理。本文利用甲烷－空气预混Ｖ形火焰研究浮力的作用。分析表明浮力不仅影响火焰的平均位置,还可能影响火焰的皱折。在１ｇｏ和μｇ下用ＯＨ－ＰＬＩＦ观测火焰,发现层流和湍流火焰呈现相反的浮力效应,这表明浮力确实影响火焰的皱折。另外,层流火焰锋面在μｇ下明显折皱,这意味着微重力也适于研究火焰中其他诱发流动的机制。     

Vibrational spectra of the excited electronic state of rhodamine molecules obtained by cars spectroscopy

CARS spectra of the ground and an excited electronic state of rhodamine dyes are observed under two different resonance conditions using nanosecond dye lasers The observed differences are not due to structural changes.     

Chemical composition of the resin essential oil of Canarium album from Vietnam

The composition of the essential oil obtained from the resin of Canarium album (Lour.) Raeusch, Burseraceae, growing in Vietnam, was studied by GC and GC/MS. Twenty-nine compounds representing 95.2% of the oil were identified. Monoterpenoids made up 93.2% of the oil, with β-pinene (33.3%), α-terpinene (19.4%), γ-terpinene (14.1%), and terpinen-4-ol (11.9%) as the main components. Sesquiterpenoids made up 2.0% of the oil, and the content of each individual was below 0.5% of the oil. Published in Khimiya Prirodnykh Soedinenii, No. 5, pp. 421–422, September–October, 2006.     

Literatur

Ohne Zusammenfassung     

Interferometric measurement of injection nozzles using ultra-small fiber-optical probes

The measurement of boreholes with diameters smaller than 500 μm is a demanding task that cannot be performed using state-of-the-art production metrology. In this letter, a miniaturized fiber probe with a diameter of 80 μm is presented. A probe is used for low-coherence interferometry to conduct highly precise measurements of form deviations of small boreholes. Measurements conducted in nozzles are also presented. The results prove the potential of the fiber-optical sensor for quality inspection of high-precision parts, such as injection nozzles, for common-rail diesel engines.