检索结果-南通市图书馆

Electrospun Poly(acrylonitrile-co-acrylic acid) Nanofibrous Membranes for Catalase Immobilization:Effect of Porphyrin Filling on the Enzyme Activity

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2011年第2期27卷 339-344页

作者： KE Bei-bei WAN Ling-shu huang Xiao-jun XU Zhi-kang Key Laboratory of Macromolecular Synthesis and Functionalization Ministry of EducationDepartment of Polymer Science and Engineering Zhejiang University Hangzhou 310027 P. R. China

Porphyrin-filled nanofibrous membranes were facilely prepared by electrospinning of the mixtures of poly（acrylonitrile-co-acrylic acid）（PANCAA） and porphyrins. 5,10,15,20-Tetraphenylporphyrin（TPP） and its metal-loderivatives（ZnTPP and CuTPP） were studied as filling mediators for the immobilization of redox enzyme. Results indicate that the introduction of TPP, ZnTPP and CuTPP improves the retention activity of the immobilized catalase. Among these three porphyrins, the ZnTPP-filled PANCAA nanofibrous membrane exhibits an activity retention of 93%, which is an exciting improvement. This improvement is attributed to both the strong catalase-porphyrin affinity and the possible facilitated electron transfer induced by the porphyrin as evidenced by quartz crystal microbalance （QCM） and fluorescence spectroscopy studies.

关键词： Enzyme immobilization Nanofibrous membrane Electrospinning Quartz crystal microbalance(QCM) Porphyrin

Biosorption Characteristics of Ectomycorrhizal Fungal Mycelium for Anthracene

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2010年第5期23卷 378-383页

作者： YI huang,shu-YING ZHANG,MING-JI LV,AND shu-GUANG XIE College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China College of Environmental Sciences and Engineering Peking University Beijing 100871 China

Objective To investigate the potential of Gomphidius viscidus,a kind of ectomycorrhizal fungi,for phytoremediation of anthracene in *** Absorptioe changes of micro-habitat were studied in *** Ectomycorrhizal plants have a strong potential for remediation of polycyclic aromatic hydrocarn characteristics of both active and inactivated *** A high calculated adsorption capacity of 1 886.79 mg/g and 1 515.15 mg/g at 25 ℃,pH 6.0 for active and inactivated mycelia respectively,was obtained based on Langmuir *** ANT biosorption was more ideally characterized by the Langmuir model than by the Freundlich *** biosorption of anthracene to biomass was extremely fast and could be modeled with pseudo-second order adsorption ***,ectomycorrhizal mycelia demonstrated a strong ability to adjust the physiological process to get adapted to the change of micro-habitat.

关键词： Biosorption Phytoremediation Anthrocene Ectomycorrhizal fungi

Decoherence of Entangled States Calculated by a Systematic Approximate Method

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第5期47卷 791-800页

作者： LIU Tao FAN Yun-Xia huang shu-Weng WANG Ke-Lin WANG Yi School of Sciences Southwest University of Science and Technology Mianyang 621010 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China Institute of Thin Films and Nano-materials Wuyi University Jiangmen 529020 China

In this paper the coherent-state approximation （CA） method is used to deal with the problem of the decoherence of the entangled states of two two-state systems. As the base of the discussion, the dissipation of one two-state system has been investigated at first. The improved results calculated by CA are given in the paper. It is shown that the right approaching behavior and scaling law have been obtained when CA is applied to the problem of dissipation of two two-state systems coupled with environment. The whole evolution process and calculated results of the decoherence of the entangled states show also the scaling law, right approaching behavior, and rich phenomenon.

关键词： decoherence coherent-state two-state

Is there A Link between Serum Thyroid Stimulating Hormone Level and the Results of in vitro Fertilization and Embryo Transfer?

在线全文

学校读者我要写书评

暂无评论

Journal of Reproduction and Contraception 2012年第1期23卷 51-56页

作者： Chen DING shu-juan huang shu-qin ZHAO Reproductive Medical Center Zaozhuang Maternal and Child Health Care CenterZaozhuang 277100China

Objective To analyze the clinical features and outcomes in infertile patients with different levels of thyroid stimulating hormone （TSH） undergoing IVF/ICSL and to investigate whether inappropriate level of TSH has the adverse effect on the results of the *** A total of 389 patients undergoing IVF/ICSI from January 2009 to December 2011 were divided into 3 groups according to the basal TSH level： group A （TSH〈 2.0 mlU/L）, group B （TSH 2.0-4.5 mlU/L） and group C （TSH〉4.5 mlU/L）. Oocyte retrieved, fertilization rate, cleavage rate, available embryo rate, pregnancy rate and miscarriage rate were analyzed to explore whether serum TSH level was correlated with the results of lVF/*** There were no differences in number of oocyte retrieved, fertilization rate, cleavage rate and available embryo rate among 3 groups （P〉0.05）. Clinical pregnancy rate in group B （43.0%） was significantly higher than that in group A （30.2%） and group B （23.5%）, respectively （P〈0.05）. There were no significant differences in miscarriage rate among 3 *** TSH level has no effect on fertility rate or miscarriage rate in patients undergoing IVF/ICSL Inadequacy TSH level would decrease the IVF/ICSI pregnancy rate.

关键词： in vitro fertilization and embryo transfer (IVF-ET) thyroid stimulating hormone(TSH) fertilization pregnancy

A facile and efficient method for hydroxylation of azabenzanthrone compounds

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2011年第1期22卷 41-44页

作者： Fang Xian Ning Xiang Weng Shi Liang huang Li Jun Gu Zhi shu huang Lian Quan Gu School of Pharmaceutical sciences Sun Yat-Sen University Guangzhou 51006 China

A novel and facile method of introducing 4-hydroxyl group into the aromatic ring of azabenzanthrone compounds was carried out by reacting azabenzanthrone compounds with hydrazine hydrate or hydroxylamine hydrochloride and sodium hydroxide in diethylene glycol （DEG） solvent. The mechanism of reaction may involve an amino intermediate and follow a hydroxyl substitution process.

关键词： Azabenzanthrone Hydroxylation Hydrazine hydrate Hydroxylamine hydrochloride Sodium hydroxide

Precipitation evolution and properties of Cu-15Ni-8Sn alloys via Al microalloying during ageing

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第10期43卷 5216-5228页

作者： Wei Luo Li-Jun Peng Xu-Jun Mi Hao-Feng Xie Yi-Cheng Cao shu-Hui huang State Key Laboratory of Nonferrous Metals and Processes GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China School of Materials Science and Engineering South China University of TechnologyGuangzhou 510640China

Studies have shown that microalloying Cu-Ni-Sn alloys using Al inhibits discontinuous precipitation reactions;however,the mechanism has not been investigated ***,this study explored the properties and precipitation evolution of Cu-15Ni-8Sn alloys without and with 1 wt%Al(Cu-15Ni-8Sn-1Al)during ageing at 500℃ through X-ray diffraction(XRD),scanning electron microscopy and high-angle annular dark-field scanning transmission electron *** results revealed that in Cu-15Ni-8Sn alloy,DO_(22)ordering first occurred after spinodal decomposition,subsequently transitioning to an L1_(2)ordering phase,during which the discontinuous precipitates gradually nucleated at the grain boundaries and formed *** alloy hardness increased sharply with ordering and then decreased rapidly after reaching its peak value,due to the dominance of the discontinuous precipitation ***,the DO_(22)ordered phase did not appear during the ageing of Cu-15Ni-8Sn-1Al alloy,and a Ni_(3)(Al_(x),Sn_(1-x))intermetallic compound with L1_(2)structure was formed,consuming Ni and Sn atoms,thereby significantly suppressing the discontinuous precipitation reaction and improving the stability during prolonged *** tensile strength(yield strength)of Cu-15Ni-8Sn and Cu-15Ni-8Sn-1Al alloys at peak hardness were 855(755)and 936 MPa(892 MPa),respectively,and their main strengthening mechanisms were solid solution strengthening and precipitation *** addition of 1 wt%Al effectively improved the precipitation strengthening effect of Cu-Ni-Sn alloys but severely decreased the ductility.

关键词： Cu-15Ni-8Sn Al addition Precipitation sequence Strengthening mechanism

Ratchet transport of overdamped particles in superimposed driven lattices

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2019年第4期28卷 108-112页

作者： shu-Na huang Wei-Jing Zhu Xiao-Qun huang Bao-Quan Ai Feng-Guo Li Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials School of Physics and Telecommunication EngineeringSouth China Normal University

Ratchet transport of overdamped particles is investigated in superimposed driven lattices using Langevin dynamics simulations. It is found that noise can strongly affect the transport of the particles. When lattices driving dominates the transport, the noise acts as a disturbance of the directed transport and slows down the average velocity of the *** the driving phase has less impact on particle transport, Gaussian white noise can play a positive role. By simply modulating these two parameters, we can control efficiency and the direction of the directed currents.

关键词： Gaussian white noise superimposed driven lattices rectification

Soliton bursts and deterministic dissipative Kerr soliton generation in auxiliary-assisted microcavities

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2019年第1期8卷 739-748页

作者： Heng Zhou Yong Geng Wenwen Cui shu-Wei huang Qiang Zhou Kun Qiu Chee Wei Wong Key Lab of Optical Fiber Sensing and Communication Networks University of Electronic Science and Technology of China611731 ChengduChina Fang Lu Mesoscopic Optics and Quantum Electronics Laboratory University of CaliforniaLos AngelesCA 90095USA Department of Electrical Computerand Energy EngineeringUniversity of ColoradoBoulderCO 80309USA Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China611731 ChengduChina

Dissipative Kerr solitons in resonant frequency combs offer a promising route for ultrafast mode-locking,precision spectroscopy and time-frequency *** dynamics for the dissipative soliton generation,however,are intrinsically intertwined with thermal nonlinearities,limiting the soliton generation parameter map and statistical success probabilities of the solitary ***,via use of an auxiliary laser heating approach to suppress thermal dragging dynamics in dissipative soliton comb formation,we demonstrate stable Kerr soliton singlet formation and soliton ***,we access a new soliton existence range with an inverse-sloped Kerr soliton evolution—diminishing soliton energy with increasing pump ***,we achieve deterministic transitions from Turinglike comb patterns directly into the dissipative Kerr soliton singlet pulse bypassing the chaotic *** is achieved by avoiding subcomb overlaps at lower pump power,with near-identical singlet soliton comb generation over twenty ***,with the red-detuned pump entrance route enabled,we uncover unique spontaneous soliton bursts in the direct formation of low-noise optical frequency combs from continuum background *** burst dynamics are due to the rapid entry and mutual attraction of the pump laser into the cavity mode,aided by the auxiliary laser and matching well with our numerical *** by the auxiliary-assisted frequency comb dynamics,we demonstrate an application of automatic soliton comb recovery and long-term stabilization against strong external *** findings hold potential to expand the parameter space for ultrafast nonlinear dynamics and precision optical frequency comb stabilization.

关键词： soliton auxiliary dissipative

In vivo study of the effect of anlotinib on the stemness of the lenvatinib-resistant hepatocellular carcinoma cells and the underlying mechanisms

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

Oncology and Translational Medicine 2024年第1期10卷 4-12页

作者： Jing Zhan shu huang Bai Wei Zao-Zao huang Sheng-Li Yang Division of Oncology Tianyou Hospital Affiliated to Wuhan University of Science and TechnologyWuhanChina Department of Hepatology of Integrated Traditional Chinese and Western Medicine The Third People's Hospital of Hubei Province Affiliated to Jianghan UniversityWuhanChina Division of Oncology Liyuan HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Yangchunhu Community Hospital Liyuan HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Cancer Center Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Hubei Key Laboratory of Precision Radiation Oncology WuhanChina Institute of Radiation Oncology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina

Background:In vivo experiments were conducted to examine the effects of the targeted drug anlotinib on the stemness of hepatocellular carcinoma(HCC)cells and lenvatinib-resistant liver cancer cells and to explore the underlying molecular ***:A subcutaneous xenograft model of Hep3B-derived HCC was established in nude mice,which were randomly divided into 2 groups(n=5 males per group):(1)intragastric administration of anlotinib(0.4 mg/kg)and(2)intragastric administration of normal *** constructed lenvatinib-resistant cell lines and randomly divided the mice into 3 groups(n=5 males per group):(1)intragastric administration of anlotinib,(2)intragastric administration of lenvatinib,and(3)intragastric administration of normal *** 2 weeks of treatment,tumor tissues were harvested,and mRNA and proteins were isolated from the *** in the expression of cancer stemness markers(epithelial cell adhesion molecule[EpCAM],CD13,CD90,aldehyde dehydrogenase 1[ALDH1],CD44,and CD45),totipotency factors(sex-determining region Y-box 2[Sox2],Nanog,octamer-binding transcription factor 4[Oct4]),and genes related to the Notch signaling pathway were ***:Compared with that in the control group,tumor size and weight were reduced in nude mice treated with *** differences were statistically significant in both the types of nude *** affected stemness markers and totipotency factors by downregulating the expression of CD133,CD90,and G-protein–coupled receptor 5(LGR5)and upregulating the expression of intercellular adhesion molecule 1(ICAM-1)and *** addition,lenvatinib-resistant cell lines increased Notch signaling pathway,whereas anlotinib inhibited Notch signaling ***:The antitumor effect of anlotinib on HCC and lenvatinib-resistant HCC cellsmay occur through inhibition of the Notch signaling *** may be the drug of choice for sequential therapy in lenvatinib-resistant liver cancer.

关键词： Anlotinib HCC Lenvatinib-resistant Notch signaling pathway