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278篇 您的检索式:作者名="Balsam"
    题名 作者 年代 出处 被引量
1利用漫反射光谱鉴定红粘土中针铁矿和赤铁矿显示文摘针铁矿(Gt)和赤铁矿(Hm)是广泛存在于土壤和沉积物中的重要铁矿物。这两种矿物在土壤和沉积物中含量很低,常规的测试手段很难有效地测定其含量。利用反射光谱联合加热处理的方法,可对土壤及沉积物样品中针铁矿和赤铁矿进行定性或半定量测定。实验结果显示,样品加热到300℃后,针铁矿的反射光谱的一阶导数特征峰发生了变化,赤铁矿的一阶导数特征峰却没有明显的变化。因此加热前后样品反射光谱一阶导数的变化取决于针铁矿和赤铁矿的含量。利用这种方法估计黄土高原第三纪红粘土样品中的赤铁矿含量约为0.3%~0.4%,针铁矿含量约为0.5%~1%。周玮 季峻峰 Balsam William 陈骏 2007高校地质学报2007,13,4:32
2DRIFTS快速测定北大西洋沉积物方解石含量及其气候指示意义--以U1308站位为例显示文摘探讨了利用漫反射红外傅立叶变换光谱(DRIFTS)来快速定量测定深海沉积物中方解石含量。以北大西洋深海沉积物为例,对标样进行DRIFTS测量,选取碳酸钙713cm-1特征峰(方解石)与石英800cm-1特征峰面积比值作为回归参数,同时用气量法测试标样的方解石含量,然后分析DRIFTS特征峰强度与方解石含量的相关性,建立校准方程并检验。结果显示,DRIFTS方法对沉积物方解石含量测量准确,尤其对低方解石含量的样品比较敏感,具有较低的检出限和较高测量精度。应用该校准方程,对北大西洋综合大洋钻探计划(IODP)U1308站位近1Ma来沉积物进行测定。其方解石含量呈典型的大西洋型旋回,反映了中布容事件(MBE)以及中更新世革命(MPE)时期方解石含量变化较大;在响应全球气候变化趋势的同时,还体现了全球碳储库变化对于北半球冰盖增长的触动机制,大洋内部深水循环影响方解石的保存。葛云 刘连文 季峻峰 Balsam William 2009高校地质学报2009,15,2:5
3Haematopoietic stem cells adopt mature haematopoietic fates in ischaemic myocardium显示文摘Balsam LB Wagers AJ Christensen JL 2004Nature2004,428,6983:1
4Haematopoietic stem cells adopt mature haematopoietic fates in ischaemic myocardium显示文摘Balsam LB Wagers A J Christensen JL 2004Nature2004,428,:1
5Anomalous magnetic properties in rocks containing the mineral siderite:Palaeomagnetic implications显示文摘Ellwood B B Balsam W Burkart B 0,,12:1
6Orthographic projection capillary array fluo- rescent sensor for mHeahh显示文摘Joshua Balsam Hugh Alan Bruck b Avraham Rasooly 2013Methods2013,,:1
7Haematopoietic stem cells adopt mature haematopoiefic fates in ischaemic myocardium 显示文摘Balsam L B Wagers A J Christensen J L 2004Nature2004,428,6983:1
8Discretionary accounting Choices and CEO Compensation'显示文摘Steven Balsam 1998Contemporary Accounting Research1998,,15:1
9Measurement of pulmonary mechanics prior to the elective extubation of neonates显示文摘Balsam MJ Jones JG Watchko TF 1990Pediatr Pulmonol1990,9,4:1
10Measurement of pulmonary mechanics prior to the elective extubation of neonates显示文摘Balsam MJ Jones JG Watchko TF 0,,04:1
11Visible spectroscopy of aerosol particles collected on filters:Iro -oxide minerals显示文摘Arimoto R Balsam W Schloesslin C 2002Atmospheric Environment2002,36,1:1
12A few critical aspects - and Achilles heels - of tissue engineering approaches to restore injured myecardium 显示文摘Kofidis T Balsam LB Robbins RC 2003Thorac Cardiovasc Surg2003,126,6:1
13Caspase-3 inhibition pre- selves myocardial geometry and longterm function after infarction 显示文摘Balsam LB Kofidis T Robbins RC 2005J Surg Res2005,124,2:1
14Use of evidence to support healthy public policy: a policy effectiveness-feasibility loop显示文摘Bowman Sarah Unwin Nigel Critchley Julia Capewell Simon Husseini Abdullatif Maziak Wasim Zaman Shahaduz Romdhane Habiba Ben Fouad Fouad Phillimore Peter Unal Belgin Khatib Rana Shoaibi Azza Ahmad Balsam 2012Bulletin of the World Health Organization2012,,11:1
15Haematopoietic stem cells adoptmature haematopoietic fates in ischaemic myocardium显示文摘Balsam LB Wagers AJ Christensen JL 2004Nature2004,428,6983:1
16Evaluating optical lightness as aproxy for carbonate content in marine sediment cores显示文摘William L Balsam Bobby C Deaton John E Damuth 0,,161:1
17Frequent activation of Akt in non-small cekk lung carcinomas and preneoplastic bronchial lesions显示文摘Balsam BR Pei J Mitsuuchi Y 2004Careimpgenesis2004,25,11:1
18Reoperative Valve Surgery in the Elderly: Predictors of Risk and Long-Term Survival显示文摘Leora B. Balsam Eugene A. Grossi David G. Greenhouse Patricia Ursomanno Abelardo DeAnda Greg H. Ribakove Alfred T. Culliford Aubrey C. Galloway 2010The Annals of Thoracic Surgery2010,,4:1
19Haematopoietic stem cells adopt mature haematopoietic fates in ischaemic myocardium显示文摘Balsam LB 2004Nature2004,428,6983:1
20Quantative reassessement of brick red lutites: Evidence from reflectance spectrophotometry 显示文摘Barrack F T Balsam W L Deaton B C 1989Marine Geology1989,,89:1
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