检索结果-南通市图书馆

Nano Research 2016年第2期9卷 473-489页

作者： tian liu Guangyu Wu Jiejun Cheng Qing Lu Yanjie Yao Zhenjing liu Dongchen Zhu Juan Zhou Jianrong Xu Jun Zhu Dannong He Country School of Materials Science and Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China National Engineering Research Center for Nanotechnology 28 East Jiang Chuan Road Shanghai 200241 China Department of Radiology Shanghai Renji Hospital Shanghai.liao Tong University School of Medicine 1630 Dong Fang Rd Shanghai 200127 China

A universal platform with M_n doping and hyaluronic acid （HA） modification, based on mesoporous silica （mSiO2）, was designed and used as a basic multifunctional material with magnetic resonance （MR） imaging. Furthermore, we added flexible functions through the addition of functional molecules. Specially, two typical compounds, hydrophobic perfluorooctyl bromide （PFOB） and hydrophilic doxorubicin （DOX）, were loaded into the channels to obtain PFOB@Mn@mSiO2@HA （PMMH） or DOX@Mn@mSiO2@HA （DMMH） or imaging and therapy, respectively. The were highly targeted to the lymph system in nanoparticles for dual-mode imaging PMMH and DMMH nanoparticles vitro and in vivo. MR and ultrasound imaging of PMMH nanoparticles were performed in the lymph system, while MR imaging and chemotherapy of DMMH nanoparticles was used to detect cancer. These results showed that both PMMH and DMMH nanoparficles can be designed with high lymph targeting efficiency. PMMH nanoparticles are a dual-mode contrast agent for both ultrasound and MR imaging for the lymph system and DMMH nanoparticles are powerful agents for the combined diagnosis and therapy of cancer in vivo.

关键词： mulfifuncfional platform dual-mode imaging magnetic resonance imaging (MRI) ultrasound imaging cancer diagnosis

Quantum speed limit of the double quantum dot in pure dephasing environment under measurement

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

Chinese Physics B 2022年第7期31卷 146-151页

作者： Zhenyu Lin tian liu Zongliang Li Yanhui Zhang Kang Lan School of Physics and Electronics Shandong Normal UniversityJinan 250014China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China

The quantum speed limit(QSL)of the double quantum dot(DQD)system has been theoretically investigated by adopting the detection of the quantum point contact(QPC)in the pure dephasing *** Mandelstam–Tamm(MT)type of the QSL bound which is based on the trace distance has been extended to the DQD system for calculating the shortest evolving *** increase of decoherence rate can weaken the capacity for potential speedup(CPS)and delay the evolving process due to the frequently measurement localizing the electron in the DQD *** system needs longer time to evolve to the target state as the enhancement of dephasing rate,because the strong interaction between pure dephasing environment and the DQD system could vary the oscillation of the *** the dephasing rate can sharp the QSL bound,but the decoherence rate would weaken the former effect and vice ***,the CPS would be raised by increasing the energy displacement,while the enhancement of the coupling strength between two quantum dots can diminish *** is interesting that there has an inflection point,when the coupling strength is less than the value of the point,the increasing effect of the CPS from the energy displacement is dominant,otherwise the decreasing tendency of the CPS is determined by the coupling strength and suppress the action of the energy displacement if the coupling strength is greater than the *** results provide theoretical reference for studying the QSL time in a semiconductor device affected by numerous factors.

关键词： quantum speed limits the DQD system the pure dephasing environment quantum measurement

Fano Effect in T-Shaped Double Quantum Dot Structure with Decoherence Effect

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第3期49卷 771-776页

作者： GAO Wen-Zhu GONG Wei-Jiang ZHENG Yi-Song liu Yu LU tian-Quan Department of Physics Jilin University Changchun 130023 China

By introducing a floating lead to mimic the decoherence mechanism, the Fano effect in the linear conductance spectrum of a T-shaped double quantum dot structure is studied. We find that even in the case that the self-energy arising from the decoherence mechanism is much smaller than the coupling strength between the connected quantum dot and the conducting lead, the Fano lineshape can be largely destroyed. In addition, the decoherence renders the high-order electron transmission paths unimportant to contributing to the Fano lineshape.

关键词： quantum dot conductance Pkno effect

Primary mucosal-associated lymphoid tissue extranodal marginal zone lymphoma of the bladder from an imaging perspective: A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第32期9卷 10024-10032页

作者： Zhen-Zhen Jiang Yuan-Yuan Zheng Chuan-Ling Hou Xia-tian liu Department of Ultrasound Shaoxing People’s Hospital(Shaoxing HospitalZhejiang University School of Medicine)Shaoxing 312000Zhejiang ProvinceChina Department of Pathology Shaoxing People’s Hospital(Shaoxing HospitalZhejiang University School of Medicine)Shaoxing 312000Zhejiang ProvinceChina

BACKGROUND Mucosal-associated lymphoid tissue extranodal marginal zone(MALT)lymphoma is a low-grade tumor that rarely occurs in the urinary *** is currently no consensus on the common imaging findings or most appropriate treatment in MALT lymphoma in the urinary bladder due to the limited number of *** SUMMARY A 48-year-old woman was admitted to the hospital with a 1-year history of macroscopic *** showed a large homogeneous mass with an unclear boundary and an irregular morphology in the *** mass had an abundant blood *** further diagnosis,transurethral cystoscopic biopsy and bone marrow biopsy was performed,and the patient was finally diagnosed with primary MALT lymphoma of the bladder.R-CHOP chemotherapy was carried *** three cycles of chemotherapy,the mass disappeared and the bladder wall thickness was only 4 mm,which indicated excellent therapeutic response to the *** date,the patient remains asymptomatic and she visits our hospital regularly for the completion of the remaining chemotherapy *** Primary MALT lymphoma of the bladder is rare,and there are certain characteristics in the ultrasonographic *** findings play an important role in evaluating the therapeutic efficacy and are critical during long-term follow-up after therapy.

关键词： Mucosal-associated lymphoid tissue extranodal marginal zone lymphoma Bladder Ultrasonography Computed tomography Case report

A honeycomb-tube packing medium and its application to column flotation

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

Mining Science and Technology 2009年第6期19卷 775-778页

作者： ZHANG Min SHI Chang-sheng liu Jiong-tian ZHAI Ai-feng School of Chemical Engineering and Technology China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Environmental Engineering Department North China Institute of Science and Technology Beifing 101601 China

We address problems in the development of large-scale flotation columns that use short cylinders. As a starting point, we investigated the packing medium to identify a highly efficient internal packing for the flotation column. The chosen packing was a honeycomb structure with an aperture diameter of 80 mm, a web thickness of 0.80 mm, a film height of 1000 mm, packed into a 400 mm diameter space, which completely filled the vessel at optimal cost. The column consisted of a modular ring of single-hole hexagonal honeycomb tube packing made from atactic polyproplene (PP-R). The packing was tested in a cyclonic, static micro-bubble flotation column. Computational fluid dynamic modeling was used to analyze the flotation fluid in a honeycomb tube packed flotation column. Our results show that the fluid axial movement was maximized and that the transverse fluid velocities were zero in the vicinity of axial flow. Using the honeycomb tube packing for copper sulfide flotation we observed that the average concentration in the product was increased to 25.41%, from an average feed concentration of 0.729%, with an average recovery of 92.92%. The demands of on-site industrial production were met.

关键词： filling column flotation mineral processing

Domain Structure and Magnetization Process in Short Glass-Coated Amorphous Microwires with Positive Magnetostriction

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2012年第10期29卷 209-212页

作者： liu Kai-Huang LU Zhi-Chao LI De-Ren liu tian-Cheng ZHOU Shao-Xiong China Iron and Steel Research Institute Group Advanced Technology and Materials Co.Ltd.Beijing 100081

The domain structure and magnetisation process in short glass-coated amorphous Fe45Co20Ni10Si9B16 microwires are investigated by analyzing the hysteresis loops measured by a vibrating sample *** of calculating the thickness of the outer shell and the critical length to observe magnetic bistability have been *** thickness of the outer shell is 2.3μm and the critical length is 8.11 mm for a microwire with a metallic core diameter of 31.1μm and a glass coat thickness of 10.6μ*** experimental results demonstrate the reliability of this method to calculate the critical length.

关键词： critical outer magnetometer

Growth of Nano-Sb_2O_3 on Mica Substrates and Flame Retardant Properties

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

Journal of China University of Mining and Technology 2006年第3期16卷 266-269页

作者： FENG Li liu Jiong-tian WANG Bing-guo SONG Shuo-jiang School of Chemical Engineering and Technology China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

In this paper, the Sb2O3 nanoparticles prepared with SbCl3 by the alky hydrolysis, processed with the surfactants, were assembled on mica substrates. The morphology and the assembled behavior of the nano-Sb2O3 on the mica were analyzed by means of TEM. The flame retardant properties of nano-Sb2O3 and Sb2O3/mica complex were studied by combustion test and thermal analysis. The results show that the Sb2O3 nanoparticles are assembled uniformly on the mica substrates. The nano-Sb2O3 was characterized with small size, narrow size distribution, uniform crystal and monodispersed particles. Compared with nano-Sb2O3, the Sb2O3/mica complexes have been achieved the same coordinated effects with Chlorinated Paraffin(CP) and excellent flame retardant properties.

关键词： Sb2O3 nanoparticle mica flame retardant chlorinated-paraffin

Crack stop holes in steel bridge decks:Drilling method and effects

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2017年第10期24卷 2372-2381页

作者： FU Zhong-qiu JI Bo-hai XIE Shu-hui liu tian-jia College of Civil and Transportation Engineering Hohai UniversityNanjing 210098China

Force analysis using a compact tension model, as recommended by ASTM, was carried out on a crack stop hole. The stress before, and after, drilling the hole was compared in terms of stress concentration and stress gradient. The optimum drilling location and diameter were studied through analysis of different locations and diameters. By analyzing the effects of flank holes and an additional hole, drilling advice was proposed and fatigue testing of the cracks in a steel bridge deck with a crack stop hole was conducted. The results show that the stress at the crack tip with a crack stop hole decreased, and the major principal stress around the hole was distributed accordingly. The optimum position of the crack stop hole centre was where the centre of the crack stop hole was situated behind the crack and the hole edge coincided with the crack tip. Therefore, hole diameters larger than 8 mm, or those weakening the section by 10%, were suggested as the best diameters. In terms of multi-hole crack stopping, a flank hole was not recommended. The optimum horizontal position of flank holes was at a distance of 1/4 of a single hole diameter from, and in front of, the single hole. Besides, the experiment showed that crack stop hole could only prevent cracks from growing and had no influence on crack growth rate.

关键词： steel bridge deck fatigue crack stop hole drilling method hole position

Thiazolylhydrazone dervatives as inhibitors for insect N-acetyl-β-D-hexosaminidase and chitinase

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第5期31卷 1271-1275页

作者： Huibin Yang Huitang Qi Zesheng Hao Xusheng Shao tian liu Qing Yang Xuhong Qian Shanghai Key Laboratory of Chemical Biology Institute of Pesticides and PharmaceuticalsSchool of PharmacyEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of the Discovery and Development of Novel Pesticide Shenyang Sinochem Agrochemicals Research and Development Co.Ltd.Shenyang 110021China School of Bioengineering Dalian University of TechnologyDalian 116024China

Insect chitinase and N-acetyl-β-D-hexosaminidases(Hex)are potential targets for developing new ***,a series of thiazolylhydrazonesⅠ(with substituted group R1 at N3)andⅡ(with substituted group R1 at N2)were designed,synthesised and evaluated as competitive inhibitors of OfHexl and OfChi-h,from the agricultural pest Ostrinia furnacalis,DerivativesⅠ-3 d andⅡ-3 d,with phenoxyethyl group at R1,demonstrated the best inhibitory activities against OfHexl and *** docking analysis indicated that the branched conformation compound II-3 d(Ki=1.5μmol/L)formed more hydrogen bonds with OfHexl than the stretched conformation compound I-3 d(Ki=5.9μmol/L).The differences in compounds’binding conformations with OfChi-h explained differences in inhibitory activity of compounds I-3 d(Ki=1.9μmol/L)and II-3 d(Ki=4.1μmol/L).This work suggests a novel scaffold for developing specific Hex and Chi-h inhibitors.

关键词： N-acetyl-β-D-hexosaminidase Chitinase Inhibitor Chitin Structure-activity relationship Thiazolylhydrazone derivatives Molecular docking

Phase behavior of TXs/toluene/water microemulsion systems for solubilization absorption of toluene

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2010年第2期22卷 271-276页

作者： Lian liu,Senlin tian ,Ping Ning Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China Faculty of Environmental Science and Engineering Kunming University of Science and Technology Kunming 650093 China

Triton Xs （TXs） surfactants/cosurfactant/water/oil （toluene） microemulsion systems for enhancing toluene solubilization were proposed and its potential was investigated for toluene removal from gas stream. The results indicated that TX-100 was superior to other TXs surfactants in removing toluene without cosurfactant. The efficiency of cosurfactants for improving toluene solubilization capacity follows the order： amine 〉 alcohol 〉 acid. According to the factor analysis, the linear cosurfactants are better than the branched ones. The effects of hydrophile-lipophile balance （HLB）, salt （NaCl） concentration and temperature on the formation of microemulsion system were also discussed. The results suggested that the optimum value of HLB was 15, the effect of NaCl concentration on the system was inconspicuous and the lower temperature enhanced the solubilization capacity. Nonionic surfactant-based microemulsions had a significant absorption enhancement for toluene, indicated by as much as 82.72% of toluene in phase composition diagram, which will have a great prospect in air pollution treatment.

关键词： microemulsion phase behavior absorption toluene