摘要:
A process for the selective hydrogenation of aliphatic or aromatic substrates under supercritical or near critical conditions. Hydrogenation is effected using a heterogeneous catalyst in a continuous flow reactor containing a supercritical or near critical reaction medium and selectively product formation is achieved by varying one or more of the temperature, pressure, catalyst and flow rate.
摘要:
Chemical vapour deposition reactions are carried out by introducing first and second precursors for the material to be deposited into a reaction chamber (5) along a plurality of separate discrete paths (21,24) where they are cooled prior to entry into the reaction chamber. The precursors are mixed in the reaction chamber which contains a heated substrate (4) and react to deposit the material on the substrate.
摘要:
Die Erfindung betrifft Bis(2,4-organylthio-s-triazin-6-yl)polysulfane der allgemeinen Formel (I) hergestellt aus Verbindungen der allgemeinen Formel (II) und einem Ammonium- oder Alkalipolysulfid, und die Verwendung derartiger Verbindungen als Beschleuniger in vulkanisierbaren Kautschukmischungen.
摘要:
Die Erfindung betrifft Bis(2,4-organylthio-s-triazin-6-yl)polysulfane der allgemeinen Formel (I) hergestellt aus Verbindungen der allgemeinen Formel (II) und einem Ammonium- oder Alkalipolysulfid, und die Verwendung derartiger Verbindungen als Beschleuniger in vulkanisierbaren Kautschukmischungen.
摘要:
Die Erfindung betrifft Mischungen schwefelhaltiger Triazinverbindungen und Verfahren zur Herstellung dieser Verbindungen mit der allgemeinen Formel in welcher bedeuten:
R1 , R 2 = H, R 2 = Benzyl, R 2 , R 3 , R 4 = C 1 -C 8 -Alkyl, Allyl, C 3 -C 8 Cycloalkyl, letzteres unsubstituiert oder mit 1-3 Methylgruppen substituiert, 2-Hydroxiethyl, 3-Hydroxipropyl, 2-Hydroxipropyl oder R 3 und R 4 (zusammen): C 4 -C 6 -Alkylen,-(CH 2 -CHX) 2 Y mit X = H, CH 3 , Y = O,S, S a : Polysulfankette mit 2-10 S-Atomen (d.h. 2 ≦ a ≦ 10), wobei die einzelnen Polysulfane in solchen Konzentrationen vorliegen, daß das statistische Mittel a ganze oder gebrochene Zahlenwerte von 2 bis 5 annimmt, dadurch gekennzeichnet, daß man eine Triazinverbindung der allgemeinen Formel mit einer in einem protischen, polaren, Lösungsmittel, insbesondere Wasser, gelösten Ammonium-oder Alkalipolysulfid bei einer Temperatur von 80 bis 140°C umsetzt.
摘要:
A device and method for controlling light by wavelength in a device with a switch plane and a dispersion plane uses optics providing an imaging function in the dispersion plane, and a Fourier transform function in the switch plane, so as to enable crosstalk to be reduced
摘要:
A method of operating a pixellated liquid crystal spatial light modulator comprising: numerically determining a hologram cell pattern for a portion of the pixellated liquid crystal spatial light modulator (200), whereby the pattern provides a desired replay intensity distribution in a Fourier plane (202); writing the determined hologram pattern to one region of the portion of the pixellated liquid crystal spatial light modulator (200); illuminating (201) the portion of the pixellated liquid crystal spatial light modulator (200) whereby the desired replay intensity distribution is attained; numerically translating or scrolling the determined hologram pattern to form at least one shifted version of the pattern for said portion of the pixellated liquid crystal spatial light modulator (200); and writing the at least one shifted version of the hologram pattern to one shifted region of the portion of the spatial light modulator (200).
摘要:
Apparatus and methods are described for calibrating an optical system having a Spatial Light Modulator, SLM, the method comprising a comparison of: a phase and/or amplitude distribution of at least one beam incident on the SLM, this phase and/or amplitude distribution measured by means of phase modulating elements on the SLM; with at least one known feature of the beam.