Sodium and potassium in the bones of penguin and skua revealed by EPR and SR-XRF technique

作     者：谢周清 徐思琦 黄宇营 何伟 金嗣昭 孙立广 

作者机构：Institute of Polar EnvironmentSchool of Earth and Space SciencesUniversity of Science and Technology of China Institute of High Energy PhysicsChinese Academy of Sciences Structure Research LaboratoryUniversity of Science and Technology of China 

出 版 物：《Chinese Journal of Polar Science》 (极地研究（英文版）)

年 卷 期：2010年第21卷第1期

页      面：22-30页

学科分类：0710[理学-生物学] 071010[理学-生物化学与分子生物学] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by grants fromthe National Natural Science Foundation of China(project nos.40776001 and 40306001) the Foundation for the Author of National Excellent Doctoral Dissertation of China(grant200354) the Ministry of Education of China,and the Chinese Academy of Sciences supported by the Chinese Arctic and Antarctic Administration SRXRF experiment is supported by BSRF 

主　　题：bone penguin and skua sodium and potassium electron paramagnetic resonance(EPR) synchrotron radiation X-ray fluorescence(SR-XRF). 

摘      要：Penguin and skua in the maritime Antarctic have high salt loadings in the body due to almost exclusive diet consumption of marine ***,the storage and turnover of sodium and potassium in these animals are poorly *** we determined the concentration and microscopic distribution of the two elements in the bones of penguin and *** average concentrations of sodium and potassium in penguin bone were comparable with that in skua bone（0.18% and 0.82% for penguin bone;0.19% and 0.76% for skua bone in dry weight）.The ratios of sodium to calcium and potassium to calcium（0.0330 and 0.0075 for penguin,0.0335 and 0.0082 for skua in average by weight） were somewhat higher than the reported ratios for terrestrial animals,indicating these marine animals＇ bone enrichment of *** ratios of sodium to potassium in average by weight were 6.75 and 4.65 for penguin and skua,*** value is much lower compared with the bulk sea water ratio of about 27.0,implying that potassium is favorable to reside in the bone rather than *** sodium and potassium were found to significant correlation with the content of organic materials in bone based upon the intensity of native signal determined by electron paramagnetic resonance（EPR）.It was estimated that almost all of potassium is kept within the organic phases,while about 30% of sodium is stored in organic phases and the other 70% within mineral *** microscopic distributions of potassium in the cross-section and/or surface were revealed by synchrotron radiation Xray fluorescence（SR-XRF） *** ratio of potassium to calcium based upon the SR-XRF intensity counter varied considerably from the surface to the interior,and on the surface the highest concentration of potassium was observed in the middle section with decreasing amounts toward the *** indirectly documented that exchange of potassium between fluid and bone organic phase maybe occur.