搜索结果: 61-75 共查到“理学 Ni”相关记录449条 . 查询时间(0.336 秒)
Study of Catalytic Hydrolysis of Alkaline NaBH4 Solution by Ru/Ni Foam Catalyst
Catalyst Chemical Hydride Hydrogen Generation Sodium Borohydride
2011/11/22
A Ni metal form was used to carry the Ru catalyst to induce the hydrogen gas from the NaBH4 solution. Results show the Ni material was replaced by Ru material. Ru has been coating twice or more to cov...
中国科学院新疆理化技术研究所三元层状结构的Li[Ni-Co-Mn]O2锂离子电池正极材料研究取得进展
中国科学院新疆理化技术研究所 三元层状结构 Li[Ni-Co-Mn]O2锂离子 电池正极材料
2011/10/18
新疆理化所锂离子电池正极材料研究课题组，针对大容量锂电池正极材料在振实密度、可逆比容量、循环寿命、安全性、材料成本等方面存在的根本性问题，多年来开展了系统的研究。
The Effect of Laser Processed Nano-SiC-Ni Metal Ceramic on the Surface Properties of the Iron-Based Material
Appraisal System Grey Relation Evaluation Theory Laser Alloying Metal-Ceramic Silicon Carbide (SiC)
2011/11/22
In this article, we have carried out the Ni based self fluxing alloy powder and studied the effect on the laser alloying of 45steel layer which contains different weight percentage of nano-SiC powders...
以骆驼蓬幼苗为材料，采用盆栽试验研究不同浓度（0、50、100、200、400 mg·kg-1）Ni、Cu处理对骆驼蓬叶片光合作用、叶绿素荧光特性及生长状况的影响.结果表明： 随着Ni浓度的增加，骆驼蓬幼苗叶片的光合色素含量、净光合速率（Pn）、气孔导度（Gs）、蒸腾速率（Tr）、PSⅡ最大光化学效率（Fv/Fm）、PSⅡ电子传递量子产率（ΦPSⅡ）、光化学猝灭系数（qP）及各项生长指标均呈显著下...
不同强度El Ni?o的衰减过程.Ⅱ,中等和较弱El Ni?o的衰减过程
中等El Ni?o 衰减 较弱El Ni?o
2010/12/27
在第二部分,我们研究了中等和较弱El Ni?o的衰减过程. 结果表明,对中等El Ni?o而言,在其发展阶段和盛期,负异常信号在西太平洋产生,但由于强度不足,在El Ni?o盛期之后迅速衰减,这是一种夭折的类西太平洋振子过程. 因此,与强El Ni?o不同,中等El Ni?o衰减进入平常态. 而较弱El Ni?o以截然不同的另一种方式进行位相转换,伴随东南太平洋副高的加强和西移,东风异常和海表温度...
在Ni/HZSM-5催化剂上低温水蒸汽重整生物油制氢
生物油 氢气 水蒸汽重整 Ni/HZSM-5催化剂
2012/1/5
利用浸渍方法制备的Ni/HZSM-5催化剂在生物油低温水蒸汽重整合成中表现了较高的催化活性． 探讨了催化剂的组成、重整温度、水碳比例对重整过程的影响．在电催化重整研究中，发现催化剂上通过的电流可以显著地促进生物油水蒸汽重整．通过对不同负载量的Ni/HZSM-5催化剂和Ni20/Al2O3催化剂的催化活性的比较，NiO在催化剂中负载量为20%(Ni20/ZSM)时表现出了最高的催化活性； 即使在45...
Oxidation resistance of graphene-coated Cu and Cu/Ni alloy
Oxidation resistance graphene-coated Cu Cu/Ni alloy
2010/11/23
The ability to protect refined metals from reactive environments is vital to many industrial and academic applications. Current solutions, however, typically introduce several negative effects, includ...
Fabrication and characterization of a Ni-Mn-Ga uniaxially textured freestanding film deposited by DC magnetron sputtering
DC magnetron sputtering freestanding Ni-Mn-Ga thick film martensitic transformation
2010/11/22
Homogeneous freestanding films have been obtained by the direct current (DC) magnetron sputtering technique using a sacrificial layer. After annealing, the films are crystallized with a strong out-of-...
Tuning macro-twinned domain sizes and the b-variants content of the adaptive 14-modulated martensite in epitaxial Ni-Mn-Ga films by co-sputtering
Magnetic shape memory alloys epitaxial films adaptive modulated-martensites twinning
2010/11/19
order to obtain modulated-martensite in our epitaxial Ni-Mn-Ga films, we have tuned the composition by using a co-sputtering process. Here we present how the composition affects the variant distributi...
Study on Adsorption Characteristics of Ni (II) by Palygorskite
Adsorption Nickel (II) Ion Palygorskite
2011/11/14
Adsorption characteristics of Ni (II) by Palygorskite were investigated using a batch adsorption, and the effects of various experimental parameters were discussed. Results showed that the adsorption ...
Evidence of Decay of Flux Ratio of Fe to Fe–Ni Line Features with Electron Temperature in Solar Flares
Sun flares corona—X-rays
2010/9/15
We report observational evidence of the decay of the flux ratio of Fe to Fe–Ni line features as a function of plasma electron temperature in solar flares in comparison to that theoretically predicted ...
Do biomass burning aerosols intensify drought in equatorial Asia during El Niño?
biomass burning aerosols equatorial Asia El Niñ o
2010/8/12
During El Niño years, fires in tropical forests and peatlands in equatorial Asia create large regional smoke clouds. We characterized the sensitivity of these clouds to regional drought, and we...
Hydrogenation of Citral over Ni and Ni-Sn Catalysts
Citral, hydrogenation citronellol Ni Ni-Sn zeolite
2010/4/16
Liquid phase citral hydrogenation over zeolite-supported monometallic Ni and bimetallic Ni-Sn catalysts was studied. The zeolite support materials were Na-Y, Na-mordenite, and clinoptilolite. Ni and S...
El Niño and a Pathogen Killed Costa Rican Toad, Study Finds（图）
El Niñ o a Pathogen Killed Costa Rican Toad
2010/3/10
Scientists broadly agree that global warming may threaten the survival of many plant and animal species; but global warming did not kill the Monteverde golden toad, an often cited example of climate-t...