摘要:
The present invention relates to a host cell having an elevated expression or activity of an enzyme as compared with the parent cell from which it has been derived, said enzyme having lactoyl-CoA reductase activity. Furthermore, provided is a method of producing lactaldehyde and/or 1,2-propanediol, said method comprising culturing said host cell and/or utilizing said enzyme to produce said compound.
摘要:
The present invention relates to a host cell having an elevated expression or activity of an enzyme as compared with the parent cell from which it has been derived, said enzyme having lactoyl-CoA reductase activity. Furthermore, provided is a method of producing lactaldehyde and/or 1,2-propanediol, said method comprising culturing said host cell and/or utilizing said enzyme to produce said compound.
摘要:
A determination of an equivalent series resistance (ESR) effect for high frequency filtering performance of a filtered feed-through assembly is described. A low frequency signal is introduced to a filtered feed-through assembly. ESR limit of the filtered feed-through is determined based on the low frequency signal.
摘要:
The present invention relates to processes for the preparation of oxo products by the hydroformylation of substrates having C═C double bonds using unmodified rhodium catalysts in a reaction mixture essentially consisting of the substrates, the catalyst and carbon dioxide in a supercritical state (scCO2). In particular, the invention relates to such processes for the preparation of products which contain substantial proportions of branched i-oxo products. Further, the invention relates to such processes for the hydroformylation of substrates which do not correspond to the general formula CnH2n. The invention further relates to such processes in which the separation of product and catalyst is effected using the special solvent properties of scCO2.
摘要翻译:本发明涉及通过使用未改性的铑催化剂在基本上由底物,催化剂和超临界状态的二氧化碳(scCO2)组成的反应混合物中,通过使用C = C双键加成甲基化制备羰基合成产物的方法。 特别地,本发明涉及制备含有相当比例的支链α-氧代产物的产物的这种方法。 此外,本发明涉及用于不对应于通式C n H 2n的底物的加氢甲酰化的这种方法。 本发明还涉及使用scCO 2的特殊溶剂性质来分离产物和催化剂的方法。
摘要:
Cyclic products are prepared by selective olefin metathesis of bifunctional or polyfunctional substrates in the presence of one or several homogeneous or heterogeneous metathesis catalysts in a reaction medium. The invention is characterized in that the substrates contain two or more functional groups in the form of substituted or non-substituted alkene or alkyne units and in that the reaction medium essentially consists of compressed carbon dioxide. Also disclosed is the preparation of cyclic or polymer products according to the disclosed process, the reaction temperature and total pressure being matched to ensure that the density of the reaction medium lies in a range d=0.2-1.5 g·cm−3 and that the product distribution is essentially controlled by the reaction medium density.
摘要:
The time base device for a watch includes at least one electric motor coil (30), an electronic module (1) that has at least one time base oscillator circuit mounted in a case of the module, and an electric power source (8). The electric motor coil (30), the electronic module (1) with an oscillator circuit and the voltage source (8), which is preferably a battery, are connected to each other mechanically and electrically without the use of a printed circuit board to form a compact unit. The electronic module includes four connection terminals (14, 15, 16, 17) on an external surface for connecting the voltage source on one side and the wires (31, 32) of a winding of the coil (30) on the other side.
摘要:
Di- and polyamines of the diphenylmethane series are prepared by a) mixing a first portion of aniline with an acid catalyst, b) mixing a second portion of aniline with formaldehyde, and c) mixing and reacting the mixtures prepared in each of steps a) and b). The diamines produced by this process may then be phosgenated to produce the corresponding di-/polyisocyanate.
摘要:
An analogue display timepiece having at least one operation mode, time-related or non time-related, and able to provide information relating to the state of this mode and/or the state of a programmed event linked to the latter. The timepiece includes at least two analogue display organs providing an hour hand (H) and a minute hand (MN), an electronic control (22) to control the operation mode, and a display arrangement capable of providing the user with at least one alphanumerical message informing him of the state of the mode and/or the state of the event. The state display arrangement is formed by the hands (H, MN) themselves which, as a function of their relative angular position driven under the control of the electronic control (22), can act structurally upon the message to make it intelligible in the selected angular position of the hands.
摘要:
The invention concerns a timepiece. Such timepiece exhibits at least two selectable modes of operation, a first referred to as time and a second referred to as nontime, and it comprises at least one hours hand (h) and one minutes hand (m) capable of being independently actuated by motor means (18, 20), electronic management means (22) for said modes of operation and an external control organ capable of operating on said management means, such timepiece being characterized in that it includes visual means for signalling entry into the non-time mode of operation, such signalling means being formed by said hours (h) and minutes (m) hands acting in an automatic and systematic fashion at least, upon entry into the nontime operating mode. The invention is applicable to an electronic timepiece having an analog display.