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Global dimension of weak smash product

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第12期7卷 2088-2092页

作者： jia ling LI Fang Department of Mathematics Zhejiang University Hangzhou 310027 China

In Artin algebra representation theory there is an important result which states that when the order of G is invertible in A then ***（AG）=***（A）. With the development of Hopf algebra theory, this result is generalized to smash product algebra. As known, weak Hopfalgebra is an important generalization of Hopf algebra. In this paper we give the more general result, that is the relation of homological dimension between an algebra A and weak smash product algebra A#H, where H is a finite dimensional weak Hopf algebra over a field k and A is an H-module algebra.

关键词： Weak Hopf algebra Weak smash product Gobal dimension

Biomimetic Preparation of Magnetite/Chitosan Nanocomposite via In Situ Composite Method ——Potential Use in Magnetic Tissue Repair Domain

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Chemical Research in Chinese Universities 2006年第6期22卷 792-796页

作者： HU Qiao-ling WU jia CHEN Fu-ping SHEN jia-cong Institute of Polymer Composites Zhejiang University Hangzhou 310027 P. R. China

This study focused on the preparation of magnetic chitusan nanocompesite that has a potential application to bone repair and regeneration using an in situ composite method where chitosan membrane was used as the template and NaOH was used as the precipitant. X-ray diffraction analysis results show the formation of magnetite in the chitosan matrix. From the magnetic measurement, it could be concluded that the magnetic chitosan rods were superparamagnetic,and that this is the unique property of nanomagnetite. Macroscopical layer structure of the magnetic chitosan rods was observed from the photographs after mechanical test, and the microlayer structure of the rods was observed from the images of scanning electron microscopy. The mechanism for preparing the rods was discussed in detail. Transmission electron microscope was used to investigate the magnetite particles in the chitosan matrix and from the images it was concluded that the magnetite particles dispersed well in chitosan matrix with particle size of about 10 nm. The mechanical properties of the magnetic chitosan rods were measured and the blending strength was found to be 98. 8 MPa. The mechanical properties did not decline when compared with those of the pure chitosan materials.

关键词： Chitosan Magnetite In situ compositing Red

Love Waves in Layered Graded Composite Structures with Imperfectly Bonded Interface

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Chinese Journal of Aeronautics 2007年第3期20卷 210-214页

作者： LIU Hua YANG jia-ling LIU Kai-xin Institute of Solid Mechanics Beijing University of Aeronautics and Astronautics Beijing 100083 China Department of Mechanics and Engineering Peking University Beijing 100871 China

Theoretical analysis and numerical calculations of Love wave propagation in layered graded composites with imperfectly bonded interface are described in this paper. On the basis of WKB method, the approximate analytic solutions for Love waves are obtained. By the interface shear spring model, the dispersion relations for Love waves in layered graded composite structures with rigid, slip, and imperfectly bonded interfaces are given, and the effects of the interface conditions on the phase velocities of Love waves in SiC/Al layered graded composites are discussed. Numerical analysis shows that the phase velocity decreases when the defined flexibility parameter is greater. For the general imperfectly bonded interface, the phase velocity changes in the range of the velocities for the rigid and slip interface conditions.

关键词： Love wave layered graded composites WKB method dispersion relation

Ubiquitin proteasome system research in gastrointestinal cancer

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World Journal of Gastrointestinal Oncology 2016年第2期8卷 198-206页

作者： jia-ling Zhong Chang-Zhi Huang Clinical Laboratory Department Sichuan Academy of Medical Science and Sichuan Provincial People’s HospitalChengdu 610072 Sichuan Province China Department of Etiology and Carcinogenesis and State Key Laboratory of Molecular Oncology Cancer Institute and HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021 China

The ubiquitin proteasome system(UPS) is important for the degradation of proteins in eukaryotic cells. It is involved in nearly every cellular process and plays an important role in maintaining body homeostasis. An increasing body of evidence has linked alterations in the UPS to gastrointestinal malignancies,including esophageal,gastric and colorectal cancers. Here,we summarize the current literature detailing the involvement of the UPS in gastrointestinal cancer,highlighting its role in tumor occurrence and development,providing information for therapeutic targets research and antigastrointestinal tumor drug design.

关键词： Ubiquitin proteasome system Gastrointestinalcancer

Thermal,Rheological and Mechanical Properties of Biodegradable Poly(propylene carbonate)/Epoxidized Soybean Oil Blends

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Chinese Journal of Polymer Science 2021年第12期39卷 1572-1580页

作者： ling Zhao Shi-ling jia Ze-Peng Wang Yun-Jing Chen Jun-jia Bian Li-Jing Han Hui-Liang Zhang Li-Song Dong Changchun UniversityofTechnology Changchun 130012China Key Laboratory of Polymer Ecomaterials Chinese Academy of SciencesChangchun Institute of Applied ChemistryChangchun 130022China Sinopec-SK(Wuhan)Petrochemical Company Limited Wuhan 430000China

Biodegradable poly(propylene carbonate)(PPC)/epoxidized soybean oil(ESO)blends with different component ratios were prepared by melt blending to improve the performance of *** phase morphology,thermal properties,rheological properties and mechanical properties of the blends were in vestigated in *** exami nation revealed good in terfacial adhesi on betwee n PPC matrix and *** to DSC and DMA,as the content of ESO increased,the glass transition temperature of the PPC component increased,indicating that there was a strong in terfacial in teracti on between the PPC matrix and *** in terfacial in teraction may be caused by rin g-opening reaction between the hydroxyl end groups of PPC and the epoxy groups of ESO,which restricted the chain movement of PPC *** disappearanee of the epoxy groups in FTIR indicated that the in terfacial in teracti on betwee n the two phases was due to the rin g-openi ng reactio n betwee n PPC and *** the addition of ESO,the thermal stabilities were *** the increasing ESO content,the modulus gradually ***,the stre ngth at yield,the strength at break and the elon gation at break were in creased for the PPC/ESO blends,suggest!ng that the enhancement of the strength and toughness of PPC was achieved by the incorporation of *** rheological measurement revealed that the complex viscosity,storage modulus and loss modulus of PPC were in creased with the increasi ng ESO content at low freque ncy,which indicated that the addition of ESO enhanced the melt strength of PPC in stead of plasticizi ng PPC.

关键词： Poly(propylene carbonate) Epoxy soybean oil Compatibility Mechanical properties

Simulation and Analysis of Crashworthiness of Fuel Tank for Helicopters

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Chinese Journal of Aeronautics 2007年第3期20卷 230-235页

作者： LUO Cheng LIU Hua YANG jia-ling LIU Kai-xin Institute of Solid Mechanics Beijing University of Aeronautics and Astronautics Beijing 100083 China Department of Mechanics and Engineering Peking University Beijing 100871 China

Crashworthiness requirement of fuel tanks is one of the important requirements in helicopter designs. The relations among the protection frame, textile layer and rubber layer of the fuel tank are introduced. Two appropriate FE models are established, one is for an uncovered helicopter fuel tank without protection frame, and the other is for fuel tank with protection frame. The dynamic responses of the two types of fuel tanks impinging on the ground with velocities of 17.3 m/s are numerically simulated for the purpose of analyzing energy-absorbing capabilities of the textile layer and protection frame. The feasibility of the current crashworthiness design of the fuel tank is examined though comparing the dynamic response behaviors of the two fuel tanks.

关键词： fuel tank crashworthiness helicopter FEM

Association between depressive mood and body image and menopausal symptoms and sexual function in perimenopausal women

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World Journal of Clinical Cases 2023年第32期11卷 7761-7769页

作者： jia ling Yu-Hong Wang Institute of Innovation and Applied Research in Chinese Medicine Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina

BACKGROUND Perimenopausal is the period when women's ovarian function begins to decline before and after *** this period,women experience a series of mental state changes,such as decreased hormone levels,decreased libido,and even female sexual dysfunction(FSD)in severe cases,which reduces their quality of *** affecting the occurrence of FSD include physiological and nonphysiological factors,among which physiological factors are ***,it is particularly important to ascertain the related non-physiological factors that affect the occurrence of FSD for improving the quality of sexual life of perimenopausal *** To investigate the mediating effect of depressive mood and body image on menopausal symptoms and sexual function in perimenopausal *** A total of 186 perimenopausal women were enrolled between January 2019 and January 2021 and divided into the FSD(134 cases)and control(52 cases)groups based on the presence and absence of *** data were compared between the two ***-related factors were analyzed using logistic regression *** Depression Scale(HAMD),Body Image Scale(BIS),and Menopause Rating Scale(MRS)scores were compared among women with different FSD *** correlation of the MRS score with the BIS and HAMD scores and the mediating effect of the BIS and HAMD scores on the MRS score and female sexual function index(FSFI)were *** The HAMD and BIS scores were higher in the FSD group than in the control group,and the difference in monthly income between the two groups was statistically significant(all P<0.05).Monthly income of<2000 yuan[odds ratio(OR)=26.586,P=0.000],BIS score(OR=1.590,P=0.000),and HAMD score(OR=1.884,P=0.000)were independent risk factors for *** scores were positively correlated with BIS and HAMD scores(r=0.358 and 0.244,P=0.000 and 0.001,respectively)and negatively correlated with FSFI scores(r=-0.433,P=0.000).Body image and depressive mood had

关键词： Perimenopause Depressive mood Body image Sexual dysfunction Mediating effect

Relationship of PARG with PARP,VEGF and b-FGF in Colorectal Carcinoma

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Chinese Journal of Cancer Research 2009年第2期21卷 135-141页

作者： ling Lin jia Li Ya-lan Wang Xiao Lin Department of Pathology Molecular Medicine and Cancer Research Center Chongqing Medical UniversityChongqing 400016 China

Objective： To investigate the relationship of poly（ADP-ribose）glycohydrolase（PARG） with poly （ADP-ribose） polymerase（PARP）, vascular endothelial growth factor （VEGF） and basic fibroblast growth factor（b-FGF） in colorectal carcinoma（CRC）. Methods： Immunohistochemical analysis was used to detect PARG, PARP, VEGF and b-FGF in human colorectal carcinoma. Flow cytometry was used to detect PARG and PARP in murine CT26 cell line. Gallotannin （GLTN） was served as PARG inhibitor. Results： The individual positive rates of PARG, PARE VEGF and b-FGF were 55.81%（24/43）, 97.67%（42/43）, 79.07%（34/43） and 81.40%（35/43）, respectively, which were significantly higher than those of control group. The positive PARG was correlated to PARP（r=0.3703, P〈0.05） and b-FGF （r=0.4838, P〈0.05）. The positive PARP was correlated to VEGF （r=0.3968, P〈0.05） and b-FGF （r=0.5610, P〈0.05）. Both PARG and PARP were expressed in CT26 cells. The positive staining rates of PARG and PARP in GLTN-treated group were 7.3% and 52.38%, respectively. They were markedly reduced than those of control group （55.41% and 95.28%, P〈0.01, n=10000）. Conclusion： The data suggest that PARG expression probably plays a role for VEGF and b-FGF expression in colorectal carcinoma.

关键词： PARG PARP VEGF b-FGF Colorectal carcinoma

Fertilization of in vitro matured human oocytes by intracytoplasmic sperm injection (ICSI) using ejaculated and testicular spermatozoa

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Asian Journal of Andrology 2005年第1期7卷 39-43页

作者： TingFengt JuanChen ling-BoCai jia-YinLiu Yun-DongMao WeiDing HumanClinicalReproductiveMedicineCenter DepartmentofObstetrics＆GynecologyTheFirstAffiliatedHospitalofNanjingMedicalUniversityNanjing210029China

Aim: To evaluate the fertilization competence of spermatozoa from ejaculates and testicle when the oocytes were matured in vitro following intracytoplasmic sperm injection (ICSI). Methods: Fifty-six completed cycles in 46 women with polycystic ovarian syndrome were grouped according to the semen parameters of their male partners. Group 1 was 47 cycles that presented motile and normal morphology spermatozoa in ejaculates and Group 2 was the other nine cycles where male partners were diagnosed as obstructive azoospermia and spermatozoa could only be found in testicular tissue fragment. All female patients received minimal stimulation with gonadotropin. Immature oocytes were matured in vitro and inseminated by ICSI. The spermatozoa from testes were retrieved by testicular fine needle aspiration. Results: A total of 449 and 78 immature oocytes were collected and cultured for 48 hours, 75.5 % (339/449) and 84.6 % (66/78) oocytes were matured in Groups 1 and 2, respectively. The percentage of oocytes achieving normal fertilization was significantly higher in Group 1 than that in Group 2 (72.9 % vs. 54.5 %, P < 0.05). There were no significant differences in the rates of oocytes cleavage and clinical pregnancies in these two groups [87.4 % (216/247) vs. 88.9 % (32/36); 21.3 % (10/47) vs. 44.4 % (4/9)]. A total of 15 babies in the two groups were healthy delivered at term. Conclusion: It appears that IVM combined with ICSI using testicular spermatozoa can produce healthy infants, while the normal fertilization rate of in vitro matured oocytes after ICSI using testicular spermatozoa was significantly lower than using the ejaculated spermatozoa.

关键词： intracytoplasmic sperm injection immature human oocytes in vitro maturation testicular fine needle sperm aspirations