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Down to the Sea for Science: 75 Years of Ocean Research, Education, and Exploration at the Woods Hole Oceanographic Institution
Woods Hole Oceanographic Institution 75 Years
2015/7/23
Since its beginning, the Woods Hole Oceanographic Institution (WHOI) has been the quintessential American oceanographic research institution. Although WHOI was not the oldest American institution dedi...
第四纪冰期-间冰期气候变化在年际尺度上是通过季节变化或季节长度的调整来实现的, 如何揭示冰期-间冰期期间季节长度的变化, 是深入探索气候变化过程和机制的新课题. 蜗牛生长季节的壳体同位素具有记录季节性气候特征的潜力. 通过对黄土高原不同气候区18 个地点现生蜗牛组合中喜冷干种Pupilla aeoli (杂色虹蛹螺)和喜暖湿种Punctum orphana (显口多点螺)蜗牛壳体碳酸盐碳、氧同位素...
^{75}As NMR study of the growth of paramagnetic-metal domains due to electron doping near the superconducting phase in LaFeAsO_{1-x}F_{x}
paramagnetic-metal domains electron doping superconducting phase LaFeAsO_{1-x}F_{x}
2012/2/27
We studied the electric and magnetic behavior near the phase boundary between antiferromagnetic (AF) and superconducting (SC) phases for a prototype of high-T_c pnictides LaFeAsO_{1-x}F_{x} by using n...
Critical-doping universality for cuprate superconductors: Oxygen nuclear-magnetic-resonance investigation of Ca(x)La(1-x)Ba(1.75-x)La(0.25+x)Cu(3)O(y)
cuprate superconductors Oxygen nuclear-magnetic-resonance investigation
2010/11/18
The critical doping levels in cuprates, where the ground state changes its nature (from an an-
tiferromagnet to a spin glass to superconductor to metal), are not universal. We investigate the origin ...
在室温下分别测量了一系列LaNi5－xAlx（x＝0.1，0.25，0.3，0.45，0.5，0.75）合金及其氘化物的中子衍射谱，利用FullProf程序对LaNi5－xAlx合金的衍射数据进行了精修，确定了它们的空间群为P6/mmm，得到了合金的晶胞参数、晶胞体积以及原子的占位，发现Al仅替代了部分处于3g位置的Ni，随着Al含量的增加，晶胞体积的变化量与Al替代量之间基本呈线性关系。对LaN...
采用105 ℃恒温热源, 75 ℃恒温沸腾, 蒸发强度为240～260 g/(h·L)等控制条件, 对MgSO4-K2SO4-H2O体系进行蒸发结晶实验, 研究了该体系在沸腾蒸发条件下的成盐规律, 根据实验现象, 定义并确定了实验条件下的初级成盐区, 扩展成盐区和条件成盐区. 实验结果表明: (1)该体系K2SO4, Leonite, langbenite和MgSO4·H2O等盐能够形成初级晶核的...
The Role of Soil Moisture in the Water-Balance of a Small-Clay Catchment,1967-75
Soil Moisture Water-Balance Small-Clay Catchment
2009/10/27
An eight year run of detailed soil moisture data has been incorporated into
simple water balance calculations in an attempt to estimate actual evapotranspiration.
The value of this data is shown whe...
焙烧温度对 MnO2-CeO2/Zr0.25Ti0. 25Al0. 5O1.75 整体式催化剂 NH3 低温选择性催化还原 NO 性能的影响
焙烧温度 选择性催化还原 氮氧化物 二氧化锰 二氧化铈 整体式催化剂
2010/4/20
采用等体积浸渍法在不同温度下焙烧制备了一系列 MnO2-CeO2/Zr0.25Ti0.25Al0.5O1.75 整体式催化剂样品, 并用低温 N2 吸附-脱附、储氧量、X 射线衍射、X 射线光电子能谱和 NH3 程序升温脱附等对催化剂进行了表征, 考察了催化剂上 NH3 选择性催化还原 (SCR) NO 的活性. 结果表明, 随着焙烧温度的升高, 催化剂的比表面积和孔体积逐渐减小, 平均孔径逐渐...
Propagation and Growth of Gulf Stream Meanders between 75°and 45°W
Gulf Stream Meanders Propagation 75°and 45°W
2008/12/3
The amplitude-dependent dispersion relation obtained for the region 75°–45°W demonstrates the decrease of phase speed as the amplitude increases; the dependence of phase speed on amplitude is found to...
从118.75 GHz附近六通道亮温反演大气温度廓线的数值模拟研究
高频微波 温度廓线 反演
2008/11/27
为了能在静止气象卫星上实现微波被动遥感探测大气温度廓线,并保持一定的地面空间分辨率(如视场小于60 km),就需要使用高频微波及大天线.欧洲和美国下一代静止气象卫星上都已考虑采用118.75 GHz附近通道.为了充分了解118.75 GHz附近通道遥感反演温度廓线的能力,为仪器研制及今后资料的解释反演提供必要的基础数据,作者开展了采用118.75 GHz附近六个通道遥感反演大气温度廓线的数值模拟研...
摘要 我们用Na~(75)_2SeO_3皮下注射诱发大鼠产生白内障后,观察~(75)Se在房水及晶状体中的分布。发现注射后4小时内,~(75)Se迅速进入眼内,产生白内障的大鼠晶状体中~(75)Se较多,而注射后未产生白内障的大鼠透明晶状体中~(75)Se进入很少。经三氯醋酸处理后,~(75)Se主要在沉淀部分,经巯基乙醇处理后,~(75)Se转移到上清液中,经Se-phadex G-200柱层析...
人神经生长因子低亲和力受体(p~(75)NGFR)cDNA的克隆及其在神经细胞中表达活性的初步研究
ｐ~（７５）ＮＧＦＲ（神经生长因子低亲和力受体） 逆转录－聚合酶链反应 基因克隆 测序 程序化细胞死亡
2007/12/17
摘要 利用酸性异硫氰酸胍－酚－氯仿一步法从人胎儿基底前脑中提取总ＲＮＡ，用逆转录与聚合酶链反应相结合的ＲＴ－ＰＣＲ法，扩增出人神经生长因子低亲和力受体ｐ~（７５）ＮＧＦＲ基因ｃＤＮＡ，在限制性内切酶ＳｍａⅠ存在下的连接体系中，将扩增出的ｃＤＮＡ片段克隆入ｐＵＣ１２的ＳｍａⅠ位或，经限制性内切酶ＥｃｏＲⅠ和ＰｓｔⅠ酶切鉴定是否插入以及ＨｉｎｄⅢ酶切鉴定方向。将重组质粒中的ｐ~（７５）ＮＧＦＲ的ｃＤＮ...
Quasi-Elastic Electron-Deuteron Scattering and Calculation of
Neutron Electromagnetic Form Factors at Q2=1.75 to
4.00 (GeV/c)2
electric form factor magnetic form factor neutron
charge distribution dipole fit
2007/8/15
2003Vol.39No.6pp.685-688DOI:
Quasi-Elastic Electron-Deuteron Scattering and Calculation of
Neutron Electromagnetic Form Factors at Q2=1.75 to
4.00 (GeV/c)2
N. Ghahramany, M. Vaez...