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Frontispiece: Irreversible Denaturation of Proteins through Aluminum‐Induced Formation of Backbone Ring Structures 下载免费PDF全文
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High pressure and high temperature synthesized MoB2 and WB2 compacts were investigated using X-ray diffraction, energy dispersive spectroscope, scanning electron microscope, Vickers indentation test and ultrasonic measurements. Experiments showed that both MoB2 and WB2 compacts are phase pure and with a grain size of 100–200 nm. Vickers indentation test under a large loading force of 49 N showed that the Vickers hardness of MoB2 and WB2 are about 21 and 22 GPa, respectively. The bulk modulus and shear modulus are about 296 GPa, and 190 GPa for MoB2 and 349 and 200 GPa for WB2 through ultrasonic measurements. Our results indicate that MoB2 and WB2 are both hard materials with a hardness similar to that of tungsten carbide, which is widely used in industry. 相似文献
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Haikuo Zhang Ruhong Li Long Chen Yingzhu Fan Hao Zhang Ruixin Zhang Lei Zheng Junbo Zhang Shouhong Ding Yongjian Wu Baochen Ma Shuoqing Zhang Dr. Tao Deng Prof. Lixin Chen Prof. Yanbin Shen Prof. Xiulin Fan 《Angewandte Chemie (International ed. in English)》2023,62(11):e202218970
Although great progress has been made in new electrolytes for lithium metal batteries (LMBs), the intrinsic relationship between electrolyte composition and cell performance remains unclear due to the lack of valid quantization method. Here, we proposed the concept of negative center of electrostatic potential (NCESP) and Mayer bond order (MBO) to describe solvent capability, which highly relate to solvation structure and oxidation potential, respectively. Based on established principles, the selected electrolyte with 1.7 M LiFSI in methoxytrimethylsilane (MOTMS)/ (trifluoromethyl)trimethylsilane (TFMTMS) shows unique hyperconjugation nature to stabilize both Li anode and high-voltage cathode. The 4.6 V 30 μm Li||4.5 mAh cm−2 lithium cobalt oxide (LCO) (low N/P ratio of 1.3) cell with our electrolyte shows stable cycling with 91 % capacity retention over 200 cycles. The bottom-up design concept of electrolyte opens up a general strategy for advancing high-voltage LMBs. 相似文献
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付海阔 《中国无机分析化学》2020,10(6):37-40
镍钴铝三元氢氧化物中Ni质量分数为45%~60%、Al为0.5%~1.5%,丁二酮肟沉淀镍的pH条件下,Al3+会水解沉淀而干扰测定。试验对丁二酮肟重量法进行改进,采用酒石酸作为Al的掩蔽剂,从而建立了酒石酸掩蔽铝-丁二酮肟重量法测定镍钴铝三元氢氧化物中Ni含量的方法。试验评价了Al对丁二酮肟重量法测Ni的干扰,并确定了酒石酸的最佳掩蔽用量,测定实际样品801505型镍钴锰三元氢氧化物(Ni0.8Co0.15Al0.05(OH)2)和851005型镍钴锰三元氢氧化物(Ni0.85Co0.1Al0.05(OH)2)的RSD(n=11)分别为0.24%、0.31%,加标回收率分别为100.20%、99.68%,且测定值与ICP-AES基本一致。 相似文献
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Jiang Mingxi Ding Yingyi Zhang Haikuo Ren Jiahao Li Jinjin Wan Chaofan Hong Yuwen Qi Mingqiang Mei Benxing Deng Lin Wu Yaohua Han Tianli Zhang Huigang Liu Jinyun 《Journal of Solid State Electrochemistry》2020,24(10):2487-2497
Journal of Solid State Electrochemistry - Two-dimensional (2D) metal oxides have been of great interest owning to their particular properties such as rapid electron transfer capability. Herein, we... 相似文献
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Irreversible Denaturation of Proteins through Aluminum‐Induced Formation of Backbone Ring Structures 下载免费PDF全文
Prof. Dr. Bo Song Dipl. Qian Sun Dr. Haikuo Li Dr. Baosheng Ge Dr. Ji Sheng Pan Prof. Dr. Andrew Thye Shen Wee Dr. Yong Zhang Dr. Shaohua Huang Dr. Ruhong Zhou Xingyu Gao Prof. Dr. Fang Huang Haiping Fang 《Angewandte Chemie (International ed. in English)》2014,53(25):6358-6363
A combination of ab initio calculations, circular dichroism, nuclear magnetic resonance, and X‐ray photoelectron spectroscopy has shown that aluminum ions can induce the formation of backbone ring structures in a wide range of peptides, including neurodegenerative disease related motifs. These ring structures greatly destabilize the protein and result in irreversible denaturation. This behavior benefits from the ability of aluminum ions to form chemical bonds simultaneously with the amide nitrogen and carbonyl oxygen atoms on the peptide backbone. 相似文献
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