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Polymer interdigitated pillar electrostatic(PIPE)actuators

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Microsystems & Nanoengineering 2022年第1期8卷 185-192页

作者： di ni Ronald Heisser Benyamin Davaji Landon Ivy Robert Shepherd Amit Lal School of Electrical and Computer Engineering Cornell UniversityIthacaNY 14853USA Sibley School of Mechanical and Aerospace Engineering Cornell UniversityIthacaNY 14853USA

This work reports a three-dimensional polymer interdigitated pillar electrostatic actuator that can produce force densities 5-10×higher than those of biological *** theory of operation,scaling,and stability is investigated using analytical and FEM *** actuator consists of two high-density arrays of interdigitated pillars that work against a restoring force generated by an integrated flexure *** actuator architecture enables linear actuation with higher displacements and pull-in free actuation to prevent the in-use stiction associated with other electrostatic *** pillars and springs are 3D printed together in the same *** pillars are coated with a gold-palladium alloy layer to form conductive *** space between the pillars is filled with liquid dielectrics for higher breakdown voltages and larger electrostatic forces due to the increase in the dielectric *** demonstrated a prototype actuator that produced a maximum work density of 54.6μJ/cc and an electrical-tomechanical energy coupling factor of 32%when actuated at 4000 *** device was operated for more than 100,000 cycles with no degradation in *** flexible polymer body was robust,allowing the actuator to operate even after high mechanical force impact,which was demonstrated by operation after drop *** it is scaled further,the reported actuator will enable soft and flexible muscle-like actuators that can be stacked in series and parallel to scale the resulting *** work paves the way for high-energy density actuators for microrobotic applications.

关键词： alloy electrostatic enable

Spectroscopic Studies on the Interaction of Asiatic Acid with Bovine Serum Albumin

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Chinese Journal of Chemistry 2011年第3期29卷 549-554页

作者： Yao, di ni, Shouhai Wen, Maogui Bian, Hedong Yu, Qing Liang, Hong Chen, Zhenfeng Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Guangxi Normal University) Ministry of Education of China Guilin Guangxi 541004 China

Fluorescence spectroscopy, Fourier transform infrared （FT-IR） spectroscopy, circular dichroism （CD） and FT-Raman spectroscopy were employed to analyze the binding of the asiatic acid （AA） to bovine serum albumin （BSA） under simulative physiological conditions. Fluorescence data revealed that the fluorescence quenching of BSA by AA was the result of the formation of BSA-AA complex. The fluorescence quenching mechanism of BSA by AA was a static quenching procedure. According to the Van＇t Hoff equation, the thermodynamic parameters enthalpy change （△H0） and entropy change （△S0） for the reaction were evaluated to be --12.55 kJ·mol^-1 and 67.08 kJomol 1, respectively, indicating that hydrophobic and electrostatic interactions played a major role in stabilizing the complex. The influence of AA on the conformation of BSA has also been analyzed on the basis of FT-IR, CD and FT-Raman spectra.

关键词： bovine serum albumin asiatic acid secondary structure fluorescence spectroscopy fourier transforminfrared (FT-IR) circular dichroism raman spectroscopy

Accurate Evaluation on the Interactions of SARS-CoV-2 with Its Receptor ACE2and Antibodies CR3022/CB6

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Chinese Physics Letters 2021年第1期38卷 131-137页

作者： Hong-ming ding Yue-wen Yin Song-di ni Yan-jing Sheng and Yu-qiang Ma Center for Soft Condensed Matter Physics and Interdisciplinary Research School of Physical Science and TechnologySoochow UniversitySuzhou 215006China National Laboratory of Solid State Microstructures and Department of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

The spread of the coronavirus disease 2019(COVID-19) caused by severe acute respiratory syndrome coronavirus-2(SARS-CoV-2) has become a global health *** binding affinity of SARS-CoV-2(in particular the receptor binding domain,RBD) to its receptor angiotensin converting enzyme 2(ACE2) and the antibodies is of great importance in understanding the infectivity of COVID-19 and evaluating the candidate therapeutic for *** propose a new method based on molecular mechanics/Poisson-Boltzmann surface area(MM/PBSA) to accurately calculate the free energy of SARS-CoV-2 RBD binding to ACE2 and *** calculated binding free energy of SARS-CoV-2 RBD to ACE2 is-13.3 kcal/mol,and that of SARS-CoV RBD to ACE2 is-11.4 kcal/mol,which agree well with the experimental results of-11.3 kcal/mol and-10.1 kcal/mol,***,we take two recently reported antibodies as examples,and calculate the free energy of antibodies binding to SARS-CoV-2 RBD,which is also consistent with the experimental ***,within the framework of the modified MM/PBSA,we determine the key residues and the main driving forces for the SARS-CoV-2 RBD/CB6 interaction by the computational alanine scanning *** present study offers a computationally efficient and numerically reliable method to evaluate the free energy of SARS-CoV-2 binding to other proteins,which may stimulate the development of the therapeutics against the COVID-19 disease in real applications.

关键词： ACE2 respiratory acute

Foliar modifications induced by inhibition of polar transport of auxin

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Cell Research 1999年第1期9卷 27-35页

作者： ni di AN LING JIAN WANG ZHI HONG XU ZHEN Ao XIA(Shanghai Institute of Plant Physiology, Chinese Academy of Sciences, Shanghai 200032, China) 1Shanghai Institute of Plant Physiology Chinese Academy of Sciences Shanghai 200032 China 1Shanghai Institute of Plant Physiology Chinese Academy of Sciences Shanghai 200032 China 1Shanghai Institute of Plant Physiology Chinese Academy of Sciences Shanghai 200032 China 1Shanghai Institute of Plant Physiology Chinese Academy of Sciences Shanghai 200032 China

The effects of auxin polar transport inhibitors, 9-hydroxy-fluorene-9-carboxylic acid (HFCA); 2, 3, 5-triiodobenzoic acid (TIBA) and trans-cinnamic acid (CA)on leaf pattern formation were investigated with shoots formed from cultured leaf explants of tobacco and cultured pedicel explants of Orychophragmus violaceus, and the seedlings of tobacco and Brassica chinensis. Although the effective concentration varies with the inhibitors used, all of the inhibitors induced the formation of trumpet-shaped and/or fused leaves. The frequency of trumpet-shaped leaf formation was related to the concentration of inhibitors in the *** observation of tobacco seedlings showed that there was only one main vascular bundle and several minor vascular bundles in normal leaves of the control, but there were several vascular bundles of more or less the same size in the trumpet-shaped leaves of treated *** results indicated that auxin polar transport played an important role on bilateral symmetry of leaf growth.

关键词： Brassica Chinensis Orychophragmus violaceus nicotiana tabacum auxin polar transport foliar modification

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重卡变速箱箱体消失模模具设计

特种铸造及有色合金 2014年第7期34卷 735-737页

作者：倪迪陕西法士特汽车传动集团有限责任公司铸造分公司

通过总结实际生产中模具设计与现场使用经验,介绍了重卡变速箱箱体消失模模具设计所采用的模具结构和工艺,使模具成型出的泡沫模样形状尺寸稳定,不易变形;使泡沫模样脱模顺畅,使用强度足够;提高了变速箱箱体的出模效率,降低了工人的劳... 详细信息

通过总结实际生产中模具设计与现场使用经验,介绍了重卡变速箱箱体消失模模具设计所采用的模具结构和工艺,使模具成型出的泡沫模样形状尺寸稳定,不易变形;使泡沫模样脱模顺畅,使用强度足够;提高了变速箱箱体的出模效率,降低了工人的劳动强度,保证了变速箱箱体的铸造精度和表面粗糙度。

关键词：消失模铸造变速箱箱体模具设计

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防止消失模模样变形的措施

特种铸造及有色合金 2014年第6期34卷 637-639页

作者：倪迪陕西法士特汽车传动集团有限责任公司铸造分公司

介绍了防止薄壁铸件消失模模样变形的工艺措施,分析了消失模模样制作的工艺流程与控制重点。射粒时,进料口应放置在进料阻力最小的位置;薄壁大平面处应少布置气塞,厚壁处多设置;设计了入料缓冲器,以实现大量进气、少量进料的方法,以解... 详细信息

介绍了防止薄壁铸件消失模模样变形的工艺措施,分析了消失模模样制作的工艺流程与控制重点。射粒时,进料口应放置在进料阻力最小的位置;薄壁大平面处应少布置气塞,厚壁处多设置;设计了入料缓冲器,以实现大量进气、少量进料的方法,以解决充填不足的问题;模样加热时以蒸气压力调节为主,时间调节为辅;冷却时使模样均匀冷却,复杂薄壁模样可延长冷却时间,并增加喷淋管分支,抽真空也是有的措施;模样脱模时,要做到连同模具漏板托盘和活块同步顶出;对于易变形的模样,可加设拉筋等防变形工装,预防变形。

关键词：消失模模样变形措施工艺控制

Wet Mechanical Milling Induced Phase Transition to Cubic Anti-Perovskite Li_(2)OHCl

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Chinese Physics Letters 2022年第2期39卷 78-81页

作者： di-Xing ni Yao-Dong Liu Zhi Deng dian-Cheng Chen Xin-Xin Zhang Tao Wang Shuai Li Yu-Sheng Zhao Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China C Innovation Laboratory Contemporary Amperex Technology Ltd.(CATL)Ningde 352100China Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technology Dongguan 523803China

Anti-perovskite solid-state electrolyte Li_(2)OHCl usually exhibits orthorhombic phase and low ionic conductivity at room ***,its ionic conductivity increases greatly when the temperature is up to 40℃,while it goes through an orthorhombic-to-cubic phase *** cubic Li_(2)OHCl with high ionic conductivity is stabilized at room temperature and even lower temperature about 10℃ by a simple synthesis method of wet mechanical *** cubic Li_(2)OHCl prepared by this method performs an ionic conductivity of 4.27×10^(-6) S/cm at room temperature,about one order of magnitude higher than that of the orthorhombic Li_(2)*** phase-transition temperature is decreased to around 10℃.Moreover,it can still remain cubic phase after heat treatment at 210℃.This work delivers a huge potential of fabricating high ionic conductivity phase antiperovskite solid-state electrolyte materials by wet mechanical milling.

关键词： temperature transition cubic

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解读电影表演中的身体语言

北京电影学院学报 2008年第6期 26-32页

作者：滴妮北京电影学院表演学院

本文就电影表演中身体语言的美学、社会学和文化属性,探讨身体语言作为表演介质的系统构成和要素意义。

关键词：电影表演身体语言

The sugar transporter system of strawberry:genome-wide identification and expression correlation with fruit soluble sugar-related traits in a Fragaria×ananassa germplasm collection

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Horticulture Research 2020年第1期7卷 1303-1321页

作者： Hai-Ting Liu Ying Ji Ya Liu Shu-Hua Tian Qing-Hua Gao Xiao-Hua Zou Jing Yang Chao Dong Jia-Hui Tan di-an ni Ke Duan Shanghai Key Laboratory of Protected Horticultural Technology Forestry and Fruit Tree Research InstituteShanghai Academy of Agricultural Sciences(SAAS)Shanghai 201403China Ecological Technique and Engineering College Shanghai Institute of TechnologyShanghai 201418China Environmental Engineering College Suzhou Polytechnic Institute of AgricultureSuzhou 215008China

Sugar from plant photosynthesis is a basic requirement for life *** transporters are the proteins that mediate sugar allocation among or within source/sink *** transporters of the major facilitator superfamily(MFS)targeting carbohydrates represent the largest family of sugar transporters in many ***(Fragaria×ananassa Duchesne)is an important crop appreciated worldwide for its unique fruit *** involvement of MFS sugar transporters(STs)in cultivated strawberry fruit sugar accumulation is largely *** this work,we characterized the genetic variation associated with fruit soluble sugars in a collection including 154 ***,a total of 67 ST genes were identified in the v4.0 genome integrated with the v4.0.a2 protein database of ***,the dominant subgenome provider for modern cultivated *** analysis updated the nomenclature of strawberry ST *** the chromosomal distribution and structural characteristics of the ST family were ***-RT-PCR analysis in nine tissues from *** screened 34 highly expressed ST genes in *** three varieties with dramatically differing fruit sugar levels,qPCR integrated with correlation analysis between ST transcript abundance and sugar content identified 13 sugar-correlated *** correlations were re-evaluated across 19 varieties,including major commercial cultivars grown in ***,a model of the contribution of the sugar transporter system to subcellular sugar allocation in strawberry fruits was *** work highlights the involvement of STs in controlling strawberry fruit soluble sugars and provides candidates for the future functional study of STs in strawberry development and responses and a new approach for strawberry genetic engineering and molecular breeding.

关键词： straw Fragaria Sugar