检索结果-南通市图书馆

Mechanically driven assembly of biomimetic 2D-material microtextures with bioinspired multifunctionality

Nano Research 2024年第2期17卷 663-678页

作者： y.ng Li Lin Jing Joshua M.Little haochen y.ng Tsai-Chun Chung Po-yen Chen Department of Chemical and Biomolecular Engineering University of MarylandCollege ParkMD 20740USA Maryland Robotics Center University of MarylandCollege ParkMD 20742USA School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore

Nature provides a wealth of bio-inspiration for advanced material *** various nanomaterials into biomimetic microtextures with bioinspired functionalities has spurred increasing research interests and facilitated technological advances in various *** recent years,two-dimensional materials(2DMs)have emerged as important building block units in the biomimicry field due to their distinct chemical,physical,electrical,electrochemical,and catalytic *** this review article,various mechanically driven assembly approaches are summarized to fabricate various genealogies of biomimetic 2DM microtextures with bio-inspired ***,sequential deformation strategies are discussed to programmably construct higher dimensional 2DM microtextures,ranging from wrinkles/crumples(one-time deformation)to multiscale hierarchies(multiple deformations).Next,the current progress using higher dimensional 2DM microtextures to imitate different biological structures and/or induce bio-inspired multifunctionality is systematically *** showcases of bio-inspiration and biomimicry using different 2DM nanosheets are highlighted:(1)wrinkle patterns of an earthworm that spur the design of strain sensors with programmable working ranges and sensitivities,(2)wrinkle appearance of a Shar-Pei dog that motivates the fabrication of stretchable energy storage devices,(3)hierarchical scale textures of a desert lizard that inspire cation-induced gelation platforms for 2DM aerogels,and(4)wrinkle skin of an elephant that influences the development of 2DM protective skin for soft ***,challenges and future opportunities of adopting 2DM nanosheets to assemble biomimetic microstructures with synergistic functionalities are discussed.

关键词： two-dimensional(2D)materials mechanically driven assembly biomimetic microtextures functional nanocomposite bio-inspired multifunctionality

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Collector efficiency for hydrosol deep-bed filtration of non-Brownian particles at low and finite Reynolds numbers

引用

Particuology 2020年第6期18卷 124-133页

作者： haochen Li John Sansalone Engineering School of Sustainable Infrastructure and Environment(ESSIE) College of EngineeringUniversity of Florida217 BlackGainesvilleFL 32611USA

Aqueous filtration systems with granular media are increasingly implemented as a unit operation for the treatment of urban *** of these aqueous filtration systems are designed with coarse granular media and are therefore subject to finite granular Reynolds numbers(Reg).In contrast to the Reg conditions generated by such designs,current hydrosol filtration models,such as the yao and RT models,rely on a flow solution that is derived within the Stokes limit at low *** systems that are subject to these finite and higher Reg regimes,the collector efficiency has not been ***,in this study,we develop a 3D periodic porosity-compensated face-centered cubic sphere(PCFCC)computational fluid dynamics(CFD)model,with the surface interactions incorporated,to investigate the collector efficiency for Reg ranging from 0.01 to *** filtration induced by interception and sedimentation is examined for non-Brownian particlesfanging from 1 to 100 μm under favorable surface interactions for particle *** results from the CFD-based PCFCC model agreed well with those of the classical RT and yao models for Regng^*,for the initial deep-bed filtration efficiency at lower yet finite(0.01 to 20)*** proposed PCFCC model has low computational cost and is extensibile from vertical to horizontal filtration at low and finite Reg.

关键词： Deep-bed filtration Granular filtration Unit operations Stormwater Urban water Urban drainage

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

冷竹关沟高陡斜坡地震动响应特征

引用

地震学报 2024年第3期46卷 502-513页

作者：唐涛王运生吴昊宸刘世成冯卓詹明斌成都理工大学地质灾害防治与地质环境保护国家重点实验室成都610059 成都理工大学环境与土木工程学院成都610059

四川省泸定县冷竹关沟两岸属于高陡斜坡,距2022年5月20日汉源M_(S)4.8地震震中52 km。基于冷竹关沟监测剖面上安置的4台强震仪对汉源M_(S)4.8地震的监测数据,分析了高陡斜坡上的地震波响应规律,并与前人研究成果对比,结果显示:(1)斜坡... 详细信息

四川省泸定县冷竹关沟两岸属于高陡斜坡,距2022年5月20日汉源M_(S)4.8地震震中52 km。基于冷竹关沟监测剖面上安置的4台强震仪对汉源M_(S)4.8地震的监测数据,分析了高陡斜坡上的地震波响应规律,并与前人研究成果对比,结果显示:(1)斜坡对此次地震的地震波放大效应在水平南北向最为显著,右岸半岛状山梁处的放大作用强于左岸浑厚山体,且随着高程的增加场地的放大作用逐渐增大;(2)斜坡右岸的地震动卓越频率为2—6 Hz,左岸主要分布在7—13 Hz,冷竹关沟高陡斜坡的地震动卓越频率在半岛状山梁部位以特低频为主,在浑厚山体斜坡以中低频为主,在未来可能发生的地震中,斜坡更容易与卓越频率在此范围内的地震动记录发生共振作用,以致坡体地震动响应强烈;(3)冷竹关沟高陡斜坡存在地震波背坡效应,同时该处斜坡对地震波的放大效应还受到微地形的控制,地震波在右岸坡顶凸起地形处能量最为强烈,右岸斜坡坡顶在地震波经过时更容易发生崩塌等次生灾害。

关键词：汉源M_(S)4.8地震冷竹关沟放大效应斜坡地震动深切峡谷

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Multi-SymplecticMethod for the Zakharov-Kuznetsov Equation

引用

Advances in Applied Mathematics and Mechanics 2015年第1期7卷 58-73页

作者： haochen Li Jianqiang Sun Mengzhao Qin Department of Mathematics College of Information Science and TechnologyHainan UniversityHainan 570228China School of Mathematical Science Nanjing Normal UniversityJiangsu 210023China LSEC Academy of Mathematics and System SciencesChinese Academy of ScienceBeijing 100190China

A newscheme for the Zakharov-Kuznetsov(ZK)equationwith the accuracy order of O(△t^(2)+△x+△y^(2))is *** multi-symplectic conservation property of the new scheme is *** backward error analysis of the newmulti-symplectic scheme is also *** solitary wave evolution behaviors of the Zakharov-Kunetsov equation is investigated by the new multi-symplectic *** accuracy of the scheme is analyzed.

关键词： The Zakharov-Kuznetsov equation multi-symplectic method backward error analysis.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of calcination temperature on the pozzolanic activity of maize straw stem ash treated with portlandite solution

引用

International Journal of Minerals,Metallurgy and Materials 2022年第6期29卷 1161-1169页

作者： Tingye Qi haochen Wang Guorui Feng yujiang Zhang Jinwen Bai yanna Han College of Mining Technology Taiyuan University of TechnologyTaiyuan 030024China Shanxi Province Research Center of Green Mining Engineering Technology Taiyuan 030024China Shanxi Coal-based Resources Green-efficient Mining Engineering Research Center Taiyuan 030024China Key Laboratory of Shanxi Province for Mine Rock Strata Control and Disaster Prevention Taiyuan 030024China

The effect of calcination temperature on the pozzolanic activity of maize straw stem ash(MSSA)was *** MSSA samples calcined at temperature values of 500,700,and 850℃ were dissolved in portlandite solution for 6 h,thereby obtaining residual *** MSSA and MSSA residual samples were analyzed using Fourier transform infrared spectroscopy,X-ray powder diffraction scanning electron microscopy,and X-ray photoelectron spectroscopy to determine vibration bonds,minerals,microstructures,and Si 2p transformation *** conductivity,pH value,and loss of conductivity with dissolving time of the MSSA-portlandite mixed solution were also *** main oxide composition of MSSA was silica and potassium *** dissolution of the Si^(4+) content of MSSA at 500℃ was higher than those of the other calcination *** conductivity and loss of conductivity of MSSA at 700℃ were higher than those of the other calcination temperatures at a particular dissolving time due to the higher KCl content in MSSA at 700℃.C-S-H was easily identified in MSSA samples using X-ray powder diffraction,and small cubic and nearly spherical particles of C-S-H were found in the MSSA residual *** conclusion,the optimum calcination temperature of MSSA having the best pozzolanic activity is 500℃,but excessive agglomeration must be prevented.

关键词： calcination temperature pozzolanic activity maize straw stem ash portlandite solution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

复合阴极材料SSC-yWO的制备及性能分析

引用

长春师范大学学报 2024年第2期43卷 178-181页

作者：王馨刘妍陈佳欢石浩辰长春师范大学物理学院吉林长春130032

采用固相法制备Sm_(0.5)Sr_(0.5)CoO_(3)-δ(SSC)-y_( 2)W_(3)O_(12)(yWO)复合阴极材料SSC-yWO,并研究该材料的物相组成、热重、Co的平均价态和氧含量。实验结果表明,SSC和yWO在1050℃以内的化学相容性良好;晶格氧的丢失和氧空位的形成... 详细信息

采用固相法制备Sm_(0.5)Sr_(0.5)CoO_(3)-δ(SSC)-y_( 2)W_(3)O_(12)(yWO)复合阴极材料SSC-yWO,并研究该材料的物相组成、热重、Co的平均价态和氧含量。实验结果表明,SSC和yWO在1050℃以内的化学相容性良好;晶格氧的丢失和氧空位的形成造成该材料在80℃左右失重较大;Co离子的平均价态和氧含量随yWO的含量升高而降低,氧空位浓度提升。

关键词：复合阴极材料物相组成氧空位

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

N-doped-carbon coated Ni2P-Ni sheets anchored on graphene with superior energy storage behavior

引用

Nano Research 2019年第3期12卷 607-618页

作者： yuanxing Zhang Li Sun Liqi Bai haochen Si yu Zhang yihe Zhang Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing No. 29 Xueyuan road Haidian district Beijing 100083 China

Transition metal phosphides (TMPs) have been widely studied as electrode materials for supercapacitors and lithium-ion batteries due to their high electrochemical reacti on activities. The practical applicati on of TMPs was gen erally hampered by their low con ductivity and large volume changes during electrochemical reactions. In this work, nitrogen-doped-carbon (NC) coated Ni2P-Ni hybrid sheets were fabricated and loaded into highly con ductive graphe ne n etwork, forming a Ni2P ?Ni@NC@G composite. The highly con ductive g raphe ne, the NC coati ng layer, and the decorated Ni nano particles in combi nation offer continu ous electro n tran sport cha nnels in the composite, resulti ng with facilitated electrode reaction kinetics and superior rate performance. Besides, the flexible graphene sheets and well-decorated Ni particles among Ni2P can effectively buffer the harmful stress during electrochemical reactions to maintain an integrated electrode structure. With these favorable features, the composite dem on strated superior capacitive and lithium storage behavior. As an electrode material for supercapacitors, the composite shows a remarkable capacitance of 2,335.5 F·g^-1 at 1 A·g^-1 and high capacitance retention of 86.4% after 2,000 cycles. Asymmetrical supercapacitors (ASCs) were also prepared with remarkable energy density of 53.125 Whk·g^-1 and power density of 3,750 Whk·g^-1. As an anode for lithium ion batteries, a high reversible capacity of 1,410 mAh·g^-1 can be delivered at 0.2 A·g^-1 after 200 cycles. Promising high rate capability was also demonstrated with a high discharge capacity of 750 mAh·g^-1 at 8 A·g^-1. This work shall pave the way for the production of other TMP materials for energy storage systems.

关键词： nickel phosphide graphene nitrogen-doped carbon asymmetric supercapacitors lithium ion batteries

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Efficacy of rigosertib, a small molecular RAS signaling disrupter for the treatment of KRAS-mutant colorectal cancer

引用

Cancer Biology & Medicine 2022年第2期19卷 213-228页

作者： Xinyi Zhou Qian Xiao Dongliang Fu haochen Zhang y.ng Tang Jinjie He yeting Hu Xiangxing Kong Fei Teng Xiangrui Liu y.ng yuan Kefeng Ding Department of Colorectal Surgery and Oncology Key Laboratory of Cancer Prevention and InterventionMinistry of Educationthe Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310009China Department of Medical Oncology Key Laboratory of Cancer Prevention and InterventionMinistry of Educationthe Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310009China Hangzhou Oncocare Co Ltd Hangzhou 310009China Department of Pharmacology Zhejiang University School of MedicineHangzhou 310058China Cancer Center Zhejiang UniversityHangzhou 310009China

Objective:Mutant KRAS,the principal isoform of RAS,plays a pivotal role in the oncogenesis of colorectal cancer by constitutively activating the RAF/MEK/ERK and PI3K/AKT *** targeted therapies are urgently *** investigated whether rigosertib,a benzyl styryl sulfone RAS signaling disruptor,could selectively kill KRAS-mutant colorectal cancer ***:CCK-8 was used to determine the cell ***-derived tumor and cancer cell xenograft models were used to detect the inhibitory efficacy of *** cytometry was used to evaluate the apoptosis and cell cycle *** and cell cycle arrest markers were detected by Western ***-DA was used to determine the reactive oxygen *** staining and Western blot were performed to characterize RAS signaling markers in colorectal cancer tissues and ***:Rigosertib(RGS)exhibited a cytotoxic effect against colorectal cancer cells,which was greater in KRAS-mutant ***,RGS induced mitotic arrest and oxidative stress-dependent apoptosis in KRAS-mutant DLD1 and HCT116 ***,RGS disrupted RAS signaling,and the inhibition of RAS/MEK/ERK was independent of cellular oxidative *** patient-derived xenograft models,the response and tumor inhibition of RGS were significantly higher in the KRAS-mutant subgroup,while p-MEK,p-ERK,and p-AKT levels of RGS-treated tumors were significantly ***,in a KRAS-mutant,chemotherapy-resistant patient-derived xenograft model,RGS showed a stronger therapeutic effect than the combination standard therapy involving fluoropyrimidine+oxaliplatin/irinotecan+***:These data showed that targeting RAS signaling using RGS could be a therapeutic treatment for KRAS-mutant colorectal cancer patients.

关键词： Colorectal cancer KRAS mutation rigosertib therapeutic effect RAS signaling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

高尿酸血症肾皮质损伤后的肾脏超声变化

引用

老年医学与保健 2024年第1期30卷 179-184页

作者：吴德评刁雪红张德先夏依旦·米吉提徐颖管昊晨郑玉琪周璕叶志斌肖婧复旦大学附属华东医院肾内科上海200040 复旦大学附属华东医院超声科上海200040 上海临床老年医学重点实验室上海200040

目的研究高尿酸血症(hyperuricemia,HUA)肾皮质损伤的超声变化。方法一共15只雄性SD大鼠随机分为3组(每组5只),包括正常组(Cont组)、模型组(HUA组)和非布司他治疗组(HUA+Feb组,Feb 3 mg/kg·d)。所有大鼠自由随意饮水和喂养普通饲料。HU... 详细信息

目的研究高尿酸血症(hyperuricemia,HUA)肾皮质损伤的超声变化。方法一共15只雄性SD大鼠随机分为3组(每组5只),包括正常组(Cont组)、模型组(HUA组)和非布司他治疗组(HUA+Feb组,Feb 3 mg/kg·d)。所有大鼠自由随意饮水和喂养普通饲料。HUA组大鼠用氧嗪酸(OA,750 mg/kg·d)灌胃8周诱导成模。HUA+Feb组大鼠于第五周开始用非布司他灌胃4周。8周后检测血清尿素氮(BUN)、血肌酐(Scr)和血尿酸(Sua)水平。测定大鼠肾皮质组织中的钠钾ATP酶(NKA)活性和NKAα1亚单位蛋白表达,并通过超声观察大鼠肾脏结构、检测皮质回声。计算肾/脾回声强度比(K/S)。此外,临床上共招募在复旦大学附属华东医院接受肾脏B超检测的正常对照(n=44)和HUA受试者(n=46),并收集他们的基本临床信息并进行比较。结果动物实验结果显示,与Cont组大鼠相比,HUA组的Sua水平升高(P0.05)。临床数据显示,HUA患者表现为肾皮质回声增强,结晶增多以及结构欠清,部分伴有多发小囊灶形成。结论HUA早期肾脏损伤的同时伴有肾脏皮质回声增强,因此超声可能用作非侵入性的影像工具,以评估早期HUA引起的肾脏损伤。

关键词：高尿酸血症(HUA) 钠钾ATP酶(NKA) 超声

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

添加剂对合成CA_6性能和显微结构的影响

引用

耐火材料 2018年第2期52卷 126-128,143页

作者：朱浩辰陈树江李国华田琳辽宁科技大学高温材料与镁资源工程学院辽宁鞍山114051

为了合成更致密的六铝酸钙材料,以86%(w)的α-Al_2O_3微粉(d_(50)=3.64μm,分析纯)和14%(w)的碳酸钙(d_(50)=5.24μm,分析纯)为原料,聚乙烯醇(PVA)为结合剂,分别外加5%(w)的化学纯TiO_2、y_2O_3、ZrO_2为添加剂,经配料、混练、成型、烘... 详细信息

为了合成更致密的六铝酸钙材料,以86%(w)的α-Al_2O_3微粉(d_(50)=3.64μm,分析纯)和14%(w)的碳酸钙(d_(50)=5.24μm,分析纯)为原料,聚乙烯醇(PVA)为结合剂,分别外加5%(w)的化学纯TiO_2、y_2O_3、ZrO_2为添加剂,经配料、混练、成型、烘干后,于1 550℃保温3 h煅烧,研究了不同添加剂对合成CA_6材料体积密度、显气孔率、常温耐压强度、物相组成和显微结构的影响。结果表明:1)在合成CA_6时加入TiO_2添加剂,生成新物相CaTiO_3,有α-Al_2O_3相剩余,能够明显地促进试样的烧结,降低显气孔率,增加体积密度,并且显著增加试样的常温耐压强度;2)在合成CA_6时加入y_2O_3添加剂,烧后试样的主要物相为CA_6和Al_5y_3O_(12)。Al_5y_3O_(12)虽然是高熔点相,但是其对材料的常温物理性能并没有影响。3)在合成CA_6时加入ZrO_2添加剂,烧后试样主要物相为CA_6和ZrO_2相,ZrO_2并没有提高试样的致密性。

关键词：六铝酸钙添加剂氧化钛氧化钇氧化锆

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：