LAMOST-MRS-B is one of the sub-surveys of LAMOST medium-resolution(R~7500)spectroscopic survey.It aims at studying the statistical properties(e.g.,binary fraction,orbital period distribution,mass ratio distribution)of...LAMOST-MRS-B is one of the sub-surveys of LAMOST medium-resolution(R~7500)spectroscopic survey.It aims at studying the statistical properties(e.g.,binary fraction,orbital period distribution,mass ratio distribution)of binary stars and exotic stars.We intend to observe about 30000 stars(10 mag≤G<14.5 mag)with at least 10 visits in five years.We first planned to observe 25 plates around the galactic plane in 2018.Then the plates were reduced to 12 in 2019 because of the limitation of observation.At the same time,two new plates located at the high galactic latitude were added to explore binary properties influenced by the different environments.In this survey project,we set the identified exotic and low-metallicity stars with the highest observation priorities.For the rest of the selected stars,we gave the higher priority to the relatively brighter stars in order to obtain high quality spectra as many as possible.Spectra of49129 stars have been obtained in LAMOST-MRS-B field and released in DR8,of which 28828 and 3375 stars have been visited more than twice and ten times with SNR≥10,respectively.Most of the sources are B-,A-,and F-type stars with-0.6<[Fe/H]<0.4 dex.We also obtain 347 identified variable and exotic stars and about 250 stars with[Fe/H]<-1 dex.We measure radial velocities(RVs)by using 892233 spectra of the stars.The uncertainties of RV achieve about 1 km·s^(-1)and 10 km·s^(-1)for 95%of late-and early-type stars,respectively.The datasets presented in this paper are available at http://www.doi.org/10.57760/sciencedb.j00113.00035.展开更多
以环氧氯丙烷为交联剂,将多乙烯多胺嫁接于青霉菌丝体表面,探讨氨基化菌丝体制备过程中的影响因素以及经氨基化改造后的菌丝体对甲基橙的吸附效果.结果表明,环氧氯丙烷的最优反应时间为4 h,环氧氯丙烷投加量为1 m L;多乙烯多胺反应时间...以环氧氯丙烷为交联剂,将多乙烯多胺嫁接于青霉菌丝体表面,探讨氨基化菌丝体制备过程中的影响因素以及经氨基化改造后的菌丝体对甲基橙的吸附效果.结果表明,环氧氯丙烷的最优反应时间为4 h,环氧氯丙烷投加量为1 m L;多乙烯多胺反应时间为4 h,多乙烯多胺投加量为1 m L,最佳反应温度为34℃.经红外光谱检测,氨基化菌丝体构建成功,氨基化改造后的菌丝体对甲基橙的最大吸附量为460 mg·g^(-1).展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.12073070,12173081,12090043,11873016,and 12173013)Yunnan Fundamental Research Project(Grant No.202101AV070001)+5 种基金the Science Research Grants from The China Manned Space Project(Grant Nos.CMS-CSST2021-A08,CMS-CSST-2021-A10,and CMS-CSST-2021-B05)CAS‘Light of West China’ProgramGuoshoujing Telescope(the Large Sky Area MultiObject Fiber Spectroscopic Telescope LAMOST)is a National Major Scientific Project built by the Chinese Academy of Sciences.Funding for the project has been provided by the National Development and Reform Commission of ChinaFunding for the DPAC has been provided by national institutions,in particular the institutions participating in the Gaia Multilateral AgreementThe LAMOST fellowship is supported by Special Funding for Advanced Users,budgeted and administrated by Center for Astronomical Mega-Science,Chinese Academy of Sciences(CAMS)supported by Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS and Special Research Assistant Program of Chinese Academy of Sciences。
文摘LAMOST-MRS-B is one of the sub-surveys of LAMOST medium-resolution(R~7500)spectroscopic survey.It aims at studying the statistical properties(e.g.,binary fraction,orbital period distribution,mass ratio distribution)of binary stars and exotic stars.We intend to observe about 30000 stars(10 mag≤G<14.5 mag)with at least 10 visits in five years.We first planned to observe 25 plates around the galactic plane in 2018.Then the plates were reduced to 12 in 2019 because of the limitation of observation.At the same time,two new plates located at the high galactic latitude were added to explore binary properties influenced by the different environments.In this survey project,we set the identified exotic and low-metallicity stars with the highest observation priorities.For the rest of the selected stars,we gave the higher priority to the relatively brighter stars in order to obtain high quality spectra as many as possible.Spectra of49129 stars have been obtained in LAMOST-MRS-B field and released in DR8,of which 28828 and 3375 stars have been visited more than twice and ten times with SNR≥10,respectively.Most of the sources are B-,A-,and F-type stars with-0.6<[Fe/H]<0.4 dex.We also obtain 347 identified variable and exotic stars and about 250 stars with[Fe/H]<-1 dex.We measure radial velocities(RVs)by using 892233 spectra of the stars.The uncertainties of RV achieve about 1 km·s^(-1)and 10 km·s^(-1)for 95%of late-and early-type stars,respectively.The datasets presented in this paper are available at http://www.doi.org/10.57760/sciencedb.j00113.00035.
文摘以环氧氯丙烷为交联剂,将多乙烯多胺嫁接于青霉菌丝体表面,探讨氨基化菌丝体制备过程中的影响因素以及经氨基化改造后的菌丝体对甲基橙的吸附效果.结果表明,环氧氯丙烷的最优反应时间为4 h,环氧氯丙烷投加量为1 m L;多乙烯多胺反应时间为4 h,多乙烯多胺投加量为1 m L,最佳反应温度为34℃.经红外光谱检测,氨基化菌丝体构建成功,氨基化改造后的菌丝体对甲基橙的最大吸附量为460 mg·g^(-1).
