NootkatoneTopophotodimerizationOn UV irradiation, nootkatone (1) dimerizes in the crystalline state to give 2, 3 and 4. The dimerized products are formed through cycloadditions and radical reactions.doi:10.1515/znb-1989-0917Johannes ReischInstitut für Pharmazeutische Chemie der Westfälischen Wilhelms...
Many laboratories studying bioluminescent or chemiluminescent systems are measuring the light emission using a photomultiplier photometer designed by E. F. MacNichol in about 1952 (1). In the time since the design of that photometer, enormous advances have occurred in electronics which allow for the...
1 首先我们得知道如何使用livephot，就是在拍照的时候，点击如图图标，将白色变成黄色，如图所示，目前就处于livephoto状态，然后处于照片的拍摄，拍摄出来就是动态的图片。2 如何看效果？就是找到相册中拍摄的动态图片，然后使用3d touch 即稍微用力长按这张图片，就可以看到动态以及有声音，如果发现没有声音，怎么解决...
The present disclosure relates to an avalanche photodiode having edge breakdown suppression. The photodiode comprises a p contact and an n contact, as well as a plurality of device layers disposed between the p contact and the n contact. The device layers include, in order from the p contact...
Photo 5 de 55 Nous conduisons l'Acura MDX Type S 202220 Octobre 2022 15:42 Essai routier d'Acura MDX Type S 2022 Auto123 2022 Photographe : D.Heyman | © auto123.comArticle en lien Acura MDX Type S 2022 essai routier : de bonnes choses arrivent à qui sait attendre L'Acura MDX...
An embodiment of a geiger-mode avalanche photodiode includes: a body of semiconductor material, having a first surface and a second surface; a cathode region of a first type of conductivity, which extends within the body; and an anode region of a second type of conductivity, which extends wi...
October 1, 2023 Can Stock Photo has now ceased operations. After nearly 20 years in business we have been forced to make this very difficult decision and would like to thank our many thousands of talented contributors and customers for making it possible. The industry has changed significantly ...
illustrées, vous en verrez une d’edwin h. land, l’homme qui a fondé la polaroid corporation et qui était chargé du développement du polaroid onestep sx-70. lors de sa sortie en 1977, le polaroid onestep sx-70 a connu un succès immédiat. le fait qu’il permette à ses ...
Most of them are due to the formation of negative ion resonances N2.Paul Veillette and , Pierre MarchandCanadian Journal of Physics
“My photo”是指一张属于你的照片——也许是你拍的所以属于你。这并不一定意味着你在照片里。 我们再来看看和my photo易混淆的几个表达 02 A photo of myself a photo of which I’m the subject, probably taken by me (a s...