【摘 要】
：
Dear Editor,Bomb-radiocarbon analysis of mode carbon has been applied in many fields of ecology.The method allows determining the residence time of carbon in ph
【机 构】
：
Biogeochemical Processes, Max-Planck-Institute for Biogeochemistry, Hans-Kn(o)ll-Str.10, Jena, Germa
论文部分内容阅读
Dear Editor,Bomb-radiocarbon analysis of mode carbon has been applied in many fields of ecology.The method allows determining the residence time of carbon in photosynthetic products and thus all organic matter in ecosystems.The atmospheric 14C signature will soon drop below the prebomb level due to fixation of atmospheric carbon in terrestrial and marine ecosystems and high rates of 14C-free fossil fuel combustion.Hence,the time is running out for bomb-radiocarbon application.Insect collections shelter an immense quantity of specimens stored in alcohol.We show how those specimens can be used for exploring the trophic structure of food webs by comparing their isotopic radiocarbon signature.
其他文献
本文对室间隔缺损合并下腔静脉上段缺如介入封堵1例分析如下。1病历摘要女,29岁。因发现心脏杂音20 a余于2006-04-18入院。入院查体:一般情况可,BP 110/60 mm Hg,HR 65次/min
Systemic JIA (SJIA) is one subtype of juvenile idiopathic arthritis (JIA) that is a leading cause of short-term and long-term disability in children [1].Althoug
假设未来中国的医药零售业会出现国美、苏宁式的企业,必然要拿下京沪两大战略高地,而前提是洞悉且有能力把握京沪市场远超过其他城市的复杂性。因为某种程度上,理解了京沪市
对颅内感染1例诊治分析如下。1临床资料男,74岁。因咳嗽、气喘5 d伴发热0.5 d住呼吸内科。患者5 d前受凉后出现咳嗽,咳白痰,伴气喘,初无发热,无恶心呕吐,无抽搐昏迷,入院当天
目的分析新生儿气胸床旁胸片特征性X线表现,探讨判定其气胸量多少的方法,指导临床治疗。方法 58例患儿均摄床旁仰卧前后位胸片,35例同时摄有仰卧水平侧位片,54例有1次或1次以
目的分析阴道试产失败中转剖宫产的原因,旨在降低剖宫产率,减少产科并发症的发生。方法对2010-01-2010-12青龙县人民医院妇产科阴道试产失败中转剖宫产的53例进行回顾性分析
我科自2009-10-2010-11采用Spectra VRM Ⅱ激光机治疗各类型痤疮50例取得满意疗效,现报告如下.rn1 临床资料rn1.1 一般资料 本组男29例,女21例,年龄14～38岁.根据国际改良分类
据巴西门户网站UOL 18日报道,巴西科技企业正在投资开发智能手机客户端教学系统,大学预科课程、律师协会考试课程等都可通过手机客户端来学习。
According to the Brazilian
踝关节骨折属于关节内骨折,而外踝骨折在踝关节扭伤中尤为常见,治疗要求解剖复位,牢固固定,早期功能锻炼.常用的治疗方法多采用切开复位钢板或张力带内固定术等,以上术式创伤
Acta Biochimica et Biophysica Sinica is happy to announce that the online manuscript submission and review system,ScholarOne Manuscript Central, is launched on