rosetta stone spanish NMR analysis and thin layer

NMR analysis and thin layer chromatography in the study of organic photo

Dual station system in the spin-bee by the relevant peak association. In Figure 7, 1.9ppm and 8.0ppra related,rosetta stone spanish, 7.1ppm ~ 7.8ppm in a related system. (4) hydrocarbon two-dimensional heteronuclear chemical shift correlation spectroscopy (NMR full decoupling) the second child in the Hydrocarbon heteronuclear chemical shift correlation spectroscopy (see circle I991 No. 1 lap 7 Cool

can be seen connected by a key Oxygen-related point. The point of the projection on the horizontal axis for the carbon chemical shift, the projection on the vertical axis is the chemical shift of hydrogen. Therefore, the closure can be seen in Figure 5 attached to carbon and 8.0ppm of hydrogen, a hydrogen connected to carbon and 1.9ppm, 3,4 and 6 carbon and hydrogen linked to 7.1 ~ 7.8ppm. HS. Port P corpse ring 8 to the above data suggested that the structure of unknown compounds 4 a A Jifei Ni oxide synthesis of ketone verify that the structure of the speculation is correct 178HjC - C - C = 01.9ppmIlC 'N / / 0. oppmHNH10.1ppml26As 'lJ3' 3'r1991 on a photosensitive material i7 · speed color negative film in the sense of feeling blue layer of low T grain emulsions Ke Preparation and characterization of selected companies in 1987 proposed that in the low-speed color negative film feel about being used in the blue layer has an average diameter of 0.2 ~ 0.55pm, the average hand shape 8:1 ratio, the total projected area of particle projected area of 50 small diameter high aspect ratio of the T particles, can improve the sensitivity _t-particle size relationship between the question and improve sensitivity and reduce the sense of blue-blue sensitivity, improve utilization and shaggy like a silver clarity. Now this technology are described below 1, the small diameter high aspect ratio of the T particles of smaller particles known AgX,ugg stivali, the greater the scattering of visible light. Monodisperse AgBr emulsion, the average particle size 0.1 ~ 10m, in the wavelength range of 300nm ~ 700pm mesh with light scattering. U.S. Patent 4,229,52 S pointed out that the light scattering caused by the particles will produce the increase in clarity decline. U. S. 3,989,527 that has an average diameter of 0. 2 # m of AgX particles, the smallest of the 40Ohm of light scattering,ed hardy shop, and has a diameter of 0.6 # m of AgX particles have a maximum of 700nm light scattering. Therefore, Kofron '~ have suggested,ugg italia, T particle diameter of at least 0.6m, in order to avoid the maximum in the visible light scattering spectrum. With the conventional technology, with an average diameter of less than 0. 55pm T-grain emulsion is difficult to produce high aspect ratio. Because the particle diameter of less than 0a55a must have very thin thickness of less than 0.07 # m in order to obtain high aspect ratio. Having an average diameter of less than 0.55 # r ~ T-particles has been used to speed color negative applications, it is in the following example as a comparison of the TC16. The average diameter of emulsion TCI6 0. 32 # m,giubbotti moncler, the average thickness of 0. 06Um, the average aspect ratio is 5.5:1. TC16 in the sense of green electricity to the bow with a sense of being above the red layer of blue layer. Sense of being in low level, in addition to the blue TC; 6, there are high aspect ratio of the T particles, and its average diameter of 0. 64} m, and the high sense of feeling blue layer has an average diameter of 1.5m Fang T Jiu tablets . Removal of color negative film in the middle and low sense of being an average diameter of the blue layer contains 0.2 ~ 0.5 # m of T particles. It has an average aspect ratio greater than 8:1, the projected area of the total projected area increases. This cover is called causer layer, and a high sense of being under the blue layer is called by the photosensitive layer. Photosensitive layer by layer based on the transmission of light exposure causer imaging. Have shown that the photosensitive layer of the dye by the clarity of images is based on the transmission cover on the capacity of Blu-ray generated by the overlay (causer) in the form of a smaller diameter than the T particles of high milk Jing, light scattering can be minimized. 3 Discussion 3.1 TLC's line of organic reactions, conditions and the treatment of choice is very useful, full use of it can significantly speed up the camera toward the hairpin in the development of the organic process. 3.2 NMR analysis on the identification of reaction intermediates fox provides a wealth of structural information, but also to the reaction mixture to estimate the relative content of components. 3.3 TLC and NMR analysis with, you can better play their respective advantages. 3a4 comprehensive use of various NMR techniques in determining the structure of unknown compounds can provide a sufficient basis. (TLC work Zifeng Plant Research and Development Institute with Taiwan for the East, etc., [1) day by Zhao, Lan Police magnetic resonance vain. (10 magpie), 973 [2] WilliamtilIu】, TflIi Ⅲ. n】 N ship R, Deo. 1982 (Received l1990.Od.1

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