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Crystallization Behavior and Dynamic Mechanical Properties of Poly(ε-caprolactone)/Octaisobutyl-Polyhedral Oligomeric Silsesquioxanes Composites Prepared via Different Methods

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Chinese Journal of Polymer Science 2020年第2期38卷 158-163,I0006页

作者： Si-qi Teng zhi-Guo Jiang Zhao-Bin qiu State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology

Two octaisobutyl-polyhedral oligomeric silsesquioxanes(oib-POSS)reinforced biodegradable poly(ε-caprolactone)(PCL)composites were prepared via two different methods,i.e.,melt compounding and solution casting,which were named as m PCL/oib-POSS and s PCL/oibPOSS,respectively,in this ***-POSS dispersed finely in both composites;moreover,oib-POSS aggregates were larger in m PCL/oib-POSS than in s PCL/*** the different preparation methods,oib-POSS obviously promoted the crystallization of PCL,especially in s PCL/oib-POSS,but did not modify the crystal structure of *** storage moduli of PCL were improved significantly in both ***/oib-POSS composites with enhanced crystallization behavior and improved dynamic mechanical properties were successfully prepared through both methods;moreover,the solution casting method was more effective than the melt compounding method.

关键词： Poly(ε-caprolactone) POSS Crystallization

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CT-6B托卡马克的电子迴旋波加热实验

物理学报 1990年第3期39卷 399-407页

作者：罗耀全王龙杨思泽陈雁萍戚霞枝李赞良王文书李文莱赵华唐继辉谭富传中国科学院物理研究所北京100080

分别使用频率为34.34GHz和20.1GHz的迴旋管系统从外侧和顶端注入微波,对CT-6B托卡马克等离子体加热,均观察到明显的加热效果。分析表明两者有不同的加热机制。前者主要属于O模的共振加热;后者为X模的非共振-高密度加热,其机制可能来源... 详细信息

分别使用频率为34.34GHz和20.1GHz的迴旋管系统从外侧和顶端注入微波,对CT-6B托卡马克等离子体加热,均观察到明显的加热效果。分析表明两者有不同的加热机制。前者主要属于O模的共振加热;后者为X模的非共振-高密度加热,其机制可能来源于高密度截止层附近的非线性现象。在两种实验中,都观测到称为二次加热的非线性加热现象。它们可能分别来自不同的物理机制。

关键词：回旋管电子回旋波加热实验

Electrical properties of a generalized 2×n resistor network

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Communications in Theoretical Physics 2023年第7期75卷 145-154页

作者： Shi Zhou zhi-Xuan Wang Yong-qi Zhao zhi-Zhong Tan Department of physics Nantong UniversityNantong 226019China

Any changes in resistor conditions will increase the difficulty of resistor network *** paper considers a new model of a generalized 2×n resistor network with an arbitrary intermediate axis that was previously *** investigate the potential function and equivalent resistance of the 2×n resistor network using the RT-I *** RT-I method involves four main steps:(1)establishing difference equations on branch currents,(2)applying a matrix transform to study the general solution of the differential equation,(3)obtaining a current analysis of each branch according to the boundary constraints,and(4)deriving the potential function of any node of the 2×n resistor network by matrix transformation,and the equivalent resistance formula between any *** article concludes with a discussion of a series of special results,comparing and verifying the correctness of the *** work establishes a theoretical basis for related scientific research and application.

关键词： generalized network difference equations matrix transform potential function equivalent resistance

Combined Detection of Serum Matrix Metalloproteinase 9,Acetyl Heparinase and Cathepsin L in Diagnosis of Ovarian Cancer

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Chinese Journal of Cancer Research 2012年第1期24卷 67-71页

作者： Wei Zhang xiao-xia Hu Xing-zhi Yang qi Wang Hong Cheng Shu-mei Wang Yan-ling Hu zhi-jun Yang Li Li Department of Gynecologic Oncology Cancer Institute and HospitalGuangxi Medical UniversityNanning 530021China Department of Gynecology and Obstetrics the People's Hospital of Guangxi ProvinceNanning 530022China

Objective： To investigate the clinic values of combining test of serum matrix metalloproteinase 9 （MMP-9）, acetyl heparinase （Hpa） and Cathepsin L （CL） in diagnosis of ovarian cancer. Methods： Serum levels of MMP-9, Hpa and CL were detected in a total of 418 cases, including 217 cases with ovarian malignant tumor, 100 cases with ovarian benign tumor and 101 healthy controls, by using enzyme-linked immunosorbent assay （ELISA）. Their correlation with clinicopathologic feature of ovarian malignant tumor was analyzed and their diagnosis performance was evaluated by receiver operating characteristic （ROC）. The combined diagnosis model was established by logistic regression analysis. Results： The serum levels of MMP-9, Hpa and CL were significantly higher in patients with ovarian malignant tumor than in benign tumor and healthy control, the serum levels of CL and Hpa were higher in epithelial cancer than in non-epithelial tumor, and MMP-9, Hpa and CL were elevated in low grade and advanced stage compared to high grade and early stage. The sensitivity for diagnosis of ovarian malignant tumor from high to low was CL, Hpa and MMP-9, and the specificity was MMP-9, CL and Hpa. The united diagnosis model was established and showed the sensitivity and specificity of combined detection were 84.6% and 82.1%, respectively, which were significantly higher than a single tumor marker. Conclusion： Serum MMP-9, Hpa and CL were correlated with ovarian malignant tumor and the combined detection of which may be valuable for clinical diagnosis of ovarian malignant tumor.

关键词： Ovarian cancer Matrix metalloproteinase 9 Acetyl heparinase Cathepsin Diagnosis

An overview of prostate diseases and their characteristics specific to Asian men

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Asian Journal of Andrology 2012年第3期14卷 458-464,I0008页

作者： Shu-Jie xia Di Cui qi Jiang Department of Urology The First People's Hospital Affiliated to Shanghai Jiao Tong UniversityShanghai 200080China

In this paper, we reviewed the features of common prostate diseases, such as benign prostatic hyperplasia （BPH）, prostate cancer （PCa） and chronic prostatitis （CP） that are specific to Asian men. Compared to the Westerners, Asians exhibit particular characteristics of prostate diseases. Through summarizing the epidemiology, symptomatology, diagnostics and therapeutics of these diseases, we find that Asians have a lower incidence of PCa than whites, but the incidences of BPH and CP are similar. Asian men with CP often suffer from fewer disease sites, but have a higher frequency of pain during urination rather than after sexual climax. Prostate-specific antigen （PSA） is a widely used marker for the diagnosis of PCa in both Asian and Western countries. Although the PSA level may be lower in Asians, the threshold used is based on whites. After reviewing the treatments available for these diseases, we did not find a fundamental difference between Asians and whites. Furthermore, the selection for the most appropriate treatment based on the individual needs of patients remains a challenge to urologists in Asia. After considering the traits of prostate diseases that are specific to Asian men, we hope to pave the way for the development of specific diagnostic and therapeutic strategies targeted specifically to Asian men.

关键词： Asians benign prostatic hyperplasia chronic prostatitis prostate cancer

Mutually inductive interactions between the lens and retina require ALK3 functions during mouse embryonic development

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International Journal of Ophthalmology(English edition) 2012年第2期5卷 119-124页

作者： qi Zhao, zhi-Yu Zhang Department of Ophthalmology Fourth Affiliated Hospital of China Medical University Shenyang 110032 Liaoning Province China Department of Ophthalmology Second Affiliated Hospital of Dalian Medical University Dalian 116023 Liaoning Province China

AIM: To investigate the mutually inductive interactions that occur between the lens and retinal tissue during the development of the vertebrate eye. METHODS: Cre-positive mice were mated with Cre-negative mice to generate 50% Cre-positive (conditional knockout, CKO) and 50% Cre-negative offspring (wild type, WT). The embryos were fixed in 4% paraformaldehyde, embedded in paraffin, and sectioned to a thickness of 4 mu m. The sections were processed for hematoxylin and eosin staining. The primary antibody used for immunofluorescence detection was sc-9305 bone morphogenetic proteins (bmp7) (Santa Cruz, US). The secondary antibody was IF-0314 aG0IgG/FITC (Santa Cruz) in combination with the primary antibody. Bright-field and fluorescent images were taken. RESULTS: Changes in the lens and retina were associated with specific alterations to the expression of type IA BMP receptor [BMPR-IA (ALK3)], which have already been implicated in eye growth. BMPR-IA was required for lens and retinal growth, but was not essential for the formation of lens. We observed that the expression of Bmp7 in the embryonic retina was reduced in the ALK3 lens of CKO mice. This phenomenon became increasingly visible in accordance with embryo development. This apparent alteration was present at stage E15.5. CONCLUSION: ALK3 is essential for lens and retinal growth. Mutually inductive interactions between the lens and retina are present in the developing mouse eye.

关键词： BMPR-IA Bmp7 inductive interactions lens retina

Understanding the spatial interaction of ultrasounds based on three-dimensional dual-frequency ultrasonic field numerical simulation

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China Foundry 2024年第1期21卷 29-43页

作者： Zhao-yang Yin qi-chi Le Yan-chao Jiang Da-zhi Zhao qi-yu Liao qi Zou Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

A transient 3D model was established to investigate the effect of spatial interaction of ultrasounds on the dual-frequency ultrasonic field in magnesium alloy *** effects of insertion depth and tip shape of the ultrasonic rods,input pressures and their ratio on the acoustic field distribution were discussed in ***,the spacing,angle,and insertion depth of two ultrasonic rods significantly affect the interaction between distinct *** a result,various acoustic pressure distributions and cavitation regions are *** spherical rods mitigate the longitudinal and transversal attenuation of acoustic pressure and expand the cavitation volume by 53.7%and 31.7%,respectively,compared to the plate and conical *** the input pressure will enlarge the cavitation region but has no effect on the acoustic pressure distribution *** acoustic pressure ratio significantly affects the pressure distribution and the cavitation region,and the best cavitation effect is obtained at the ratio of 2:1(P15:P20).

关键词： dual-frequency ultrasonic numerical model acoustic pressure spatial interaction magnesium alloy

EFFECT OF SURFACTANTS ON Ni-TiN NANOCOMPOSITE COATINGS PREPARED BY ULTRASONIC ELECTRODEPOSlTION

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Chinese Journal of Mechanical Engineering 2008年第3期21卷 84-86页

作者： xia Fafeng JIA Zhenyuan WU Menghua LI zhi School of Mechanical Engineenng Dalian University of Technology Dalian 116023 China School of Mechanical Engineenng Dalian University Dalian 116622 China

Ni-TiN nanocomposite coatings were prepared by ultrasonic electrodeposition, and the effects of the surfactants on the coatings were investigated and the microstructure and micro rigidity of the coatings were characterized. Samples were also submitted to corrosion tests in 3% NaCl solution. The results showed that the surfactants had great effects on Ni-TiN nanocomposite coatings. The composite coatings prepared by ultrasonic electrodeposition with the surfactants were better than that of the coatings prepared without surfactants. The favorable properties of Ni-TiN nanocomposite coatings were prepared with the mixing of the non-ion and positive ion surfactants. The concentration of the mixing was 80 mg/L, and the ratio of the non-ion and positive ion surfactants was 1： 2.

关键词： Effect Surfactant Ni-TiN Nanocomposite coating

DFT Study on Homolytic Dissociation Enthalpies of C-I Bonds

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Chinese Journal of Chemical Physics 2013年第5期26卷 541-548,I0003页

作者： Wen-rui Zheng zhi-chong Chen Wu-xia Xu Department of Chemistry and Chemical Engineering Shanghai University of Engineering ScienceShanghai 201620 China

The C-I bond dissociation enthalpies （BDE） of various organic iodides were calculated using high-level theoretical methods including MP2 and CCSD（T） with extrapolated basis set as well as a number of density functional theory methods. After systematic evaluation of the theoretical results against available experimental C-I BDEs, it was found that the MPW LYPIM method gave the lowest root mean square error. We, therefore, used this method to examine the substituent effects on different categories of C（sp3）-I and C（sp2）-I bonds. Fur thermore, the remote substituent effects on the C-I BDEs of substituted iodobenzenes and substituted （iodomethyl）benzenes were also investigated at the same level. The C-I BDEs of typical heteroaromatic iodides including five-membered and six-membered heterocyclic iodides were also examined.

关键词： C'I bond Bond dissociation enthalpy Density functional theory