The Binary Star, β Delphini (=β 151)
نویسندگان
چکیده
منابع مشابه
Interferometry and spectroscopy of β Cen : a β Cephei star in a binary system ⋆
β Cen is a bright β Cephei variable and has long been suspected to be a binary. Here we report interferometric observations with the 3.9-m Anglo-Australian Telescope at a single epoch which show the star to be a binary with components separated by 15 milliarcsec and having approximately equal luminosities at 486 nm. We also present high-resolution spectra taken over five nights with the ESO CAT...
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β- آمینو الکلها کاربرد وسیعی در زمینه های صنعتی، بیولوژیکی و دارویی دارند. واکنش افزایش هسته دوستی آمین ها به اپوکسید ها یکی از روشهای موثر برای سنتز این دسته از ترکیبات می باشد که معمولاً به وسیلهء اسیدهای لوئیس از قبیل zncl2، ساماریوم یدید ، آلومینا ، sn(otf)2 و ... انجام می شوند. از آنجاییکه این روشها دارای معایبی از قبیل زمان واکنش طولانی، شرایط سخت واکنش، راندمان پایین، استفاده از حلال سمی ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1881
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/41.5.305