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Search Results: 1 - 10 of 11438 matches for " Fei Zhai "
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Magnetically Stabilized Order. II: Critical states and algebraically ordered nematic spin liquids in one-dimensional optical lattices
Hui Zhai,Fei Zhou
Physics , 2005, DOI: 10.1103/PhysRevB.72.014422
Abstract: We investigate the Zeeman-field-driven quantum phase transitions between singlet spin liquids and algebraically ordered O(2) nematic spin liquids of spin-one bosons in one-dimensional optical lattices. We find that the critical behavior is characterized by condensation of hardcore bosons instead of ideal magnons in high dimensional lattices. Critical exponents are strongly renormalized by hardcore interactions and critical states are equivalent to the free Fermion model up to the Friedal oscillations. We also find that the algebraically ordered nematic spin liquids close to critical points are fully characterized by the Luttinger liquid dynamics with Luttinger liquid parameters magnetically tunable. The Bethe Ansatz solution has been applied to determine the critical magnetization and nematic correlations.
Investigation of amyloid deposition in uterine leiomyoma patients  [PDF]
Jinping Liu, Fei Zhai, Peng Ge, Jinhai Lu, Xuguo Sun, Yi Qin
Health (Health) , 2012, DOI: 10.4236/health.2012.48083
Abstract: Objects: To investigate the pathogenesis of amyloid presented in uterine leiomyoma. Methods: 36 uterine leiomyoma patients were recruited and divided into two groups according to Congo red staining results. 6 cases are Congo red staining-positive, and 30 cases Congo red staining-negative which represented amyloid positive and amyloid negative respectively. All patients’ serum total protein (TP), albumin (Alb) and prealbumin (PA) levels were measured as well as blood hemoglobin (Hb), cell counts of white blood cell (WBC), neutrophils (NEU) and lymphocyte (LYM). Glycogen in tissue was compared between amyloid accumulated and amyloid negative sections with periodic acid schiff staining (PAS) in leiomyoma patients. Results: All of blood Hb concentration, WBC, NEU and LYM have not been found significant differences between two groups. Also no obvious infiltration of inflammatory cells was observed in tissue with amyloid deposition in uterine leiomyoma patients. And levels of TP, Alb and prealbumin have not been found significant differences between two groups. The amyloid was negative in leiomyoma entity cells range by Congo red staining, while small blood vessels in myoma tissues were positively detected with high rate. Amyloid was found in normal tissue around myoma as well as in blood vessel of pseudo-capsule. Increased PAS-positive material induced by leiomyoma was not correlated with amyloid deposition. Conclusions: Metabolic changes in the setting of functional alterations of cell in local microenvironment with uterine leiomyoma, may be related to the amyloid deposition.
miR-582-5p Is Upregulated in Patients with Active Tuberculosis and Inhibits Apoptosis of Monocytes by Targeting FOXO1
Yanhua Liu, Jing Jiang, Xinjing Wang, Fei Zhai, Xiaoxing Cheng
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0078381
Abstract: Macrophage apoptosis is a host innate defense mechanism against tuberculosis (TB). In this study, we found that percentage of apoptotic cells in peripheral blood monocytes from patients with active TB was lower than that from healthy controls (p<0.001). To understand whether microRNAs can modulate apoptosis of monocytes, we investigated differentially expressed microRNAs in patients with active TB. miR-582-5p was mainly expressed in monocytes and was upregulated in patients with active TB. The apoptotic percentage of THP-1 cells transfected with miR-582-5p mimics was significantly lower than those transfected with negative control of microRNA mimics (p<0.001), suggesting that miR-582-5p could inhibit apoptosis of monocytes. To our knowledge, the role of miR-582-5p in regulating apoptosis of monocytes has not been reported so far. Systematic bioinformatics analysis indicated that FOXO1 might be a target gene for miR-582-5p and its 3′UTR contains potential binding sites for miR-582-5p. To determine whether miR-582-5p could influence FOXO1 expression, miR-582-5p mimics or negative control of microRNA mimics were transfected into THP-1 cells. RT-PCR and western blot analysis showed that the miR-582-5p could suppress both FOXO1 mRNA and protein expression. Co-transfection of miR-582-5p and FOXO1 3′UTR-luciferase reporter vector into cells demonstrated that significant decrease in luciferase activity was only found in reporter vector that contained a wild type sequence of FOXO1 3′UTR, suggesting that miR-582-5p could directly target FOXO1. In conclusion, miR-582-5p inhibited apoptosis of monocytes by down-regulating FOXO1 expression and might play an important role in regulating anti-M. tuberculosis directed immune responses.
Degeneracy of Many-body Quantum States in an Optical Lattice with a Uniform Magnetic Field
Jian Zhang,Chao-Ming Jian,Fei Ye,Hui Zhai
Physics , 2010, DOI: 10.1103/PhysRevLett.105.155302
Abstract: We prove a theorem that shows the degeneracy of many-body states depends on total particle number and flux filling ratio, for particles in a periodic lattice and under a uniform magnetic field. Non-interacting fermions and weakly interacting bosons are given as two examples. For the later case, this phenomena can also be understood in terms of destructive quantum interferences of multiple symmetry related tunneling paths between classical energy minima, which is reminiscent of the spin-parity effect discovered in magnetic molecular cluster. We also show that the quantum ground state of a mesoscopic number of bosons in this system is not a simple mean-field state but a fragmented state even for very weak interactions.
The Processing of Dui-construction in Chinese  [PDF]
Yong Zhai
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.26086
Abstract: In the present study, I examined the Dui-construction from a psycholinguistic perspective. Two experiments on the processing of Dui-constructions have been carried out to reexamine the findings of previous experiments on empty subjects in English and Japanese. There are two advantages of using the Chinese Dui-construction over English and Japanese. Firstly, Chinese is similar to English in that the verb is located before the empty subject of an infinitival clause. It is therefore possible to verify whether the verb control information is delayed or not in this case. Secondly, Chinese is similar to Japanese in that they both allow scrambling of arguments. As such, I can examine whether the recency hypothesis applies to Chinese or not. The results indicated that 1) The control information of the verb is accessed immediately; 2) The recency hypothesis is not supported in the processing of Duii-constructions. In other words, there exists a language-specific processing system independent of the general recency strategy.
SUMOylation of Mouse p53b by SUMO-1 Promotes Its Pro-Apoptotic Function in Ovarian Granulosa Cells
Xiao-Ming Liu, Fei-Fei Yang, Yi-Feng Yuan, Rui Zhai, Li-Jun Huo
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0063680
Abstract: Follicular atresia is a process of spontaneous degradation of follicles, hindering growth and development in the mammalian ovary. Previous studies showed that follicular atresia was caused by apoptosis of granulosa cells, for which a number of apoptosis-related genes have already been identified. The roles of p53 in apoptosis of mouse granulosa cells and its post-translational modification are still unclear. The main objective of this study was to explore the roles of p53 in mouse granulosa cells. We found that mouse p53b, but not p53a, could be SUMOylated by SUMO-1 at lysine 375, which was essential for the protein stability of p53b in a dose-dependent manner. Immunofluorescent staining showed that wild p53b was located in the nucleus of granulosa cells, while its mutation of SUMOylated site (K375R) was localized in both nucleus and cytoplasm, implying that SUMOylation was necessary for the nuclear localization of p53b in granulosa cells. Overexpression of wild-type p53b, but not the mutation of SUMOylation site (K375R), significantly induced the expression of apoptosis-related gene, Bax, and increased the level of apoptosis in granulosa cells. This suggested that SUMO-1 modification of p53b was essential for inducing apoptosis in granulosa cells. Our results provide strong evidences that modification of p53b by SUMO-1 at lysine 375 was necessary for its activity to induce apoptosis in mouse granulosa cells, and it was involved in the regulation of p53b protein stability and nuclear localization. This implies that modification of p53b by SUMO-1 might regulate follicular atresia by inducing the apoptosis of ovarian granulosa cells in mice.
Sufu Production Through Enzymes
Fei Lu,Jun-She Sun,Bei-zhong Han,Yong-ling Zhai
Journal of Food Technology , 2013,
Abstract: Sufu is a kind of Chinese traditional fermented soybean food. This article analyzes the problems existing in the process of sufu production, such as semi-manual operations, high salinity, long producing cycle and so on in process control. It is suggested that the application of biotechnology in producing paste sufu with enzymes could overcome the problems and help to realize the industrialization of sufu production.
Secure Framework Based on Signing Proxy Certificate On-line for Grid System
一种代理证书在线签署的网格安全框架设计*

WANG Zhen-fei,ZHAI Guang-qun,
王振飞
,翟光群

计算机应用研究 , 2007,
Abstract: This paper proposed a new secure framework UserCA for a grid system,which was based on signing a proxy certificate on-line.It supported cross-domain access, and it make the user access the grid-service without manual providing his proxy certificate,it only needed to setup a UserCA client and configure it before run it.Furthermore,it strengthened the security of the system for reducing the transfer of the private key of proxy certificate in the network.
Multiple-model switching control based on dynamic model bank
基于动态模型库的多模型切换控制

ZHAI Jun-yong,FEI Shu-min,
翟军勇
,费树岷

控制理论与应用 , 2009,
Abstract: Multiple-model switching control(MMSC) based on a dynamic model bank is proposed to deal with discretetime systems with bounded disturbance and parameter variations. An online learning algorithm is applied to build multiple models automatically, and optimize the model bank. At each sampling time, a model, which best matches the current dynamics of the system, is chosen; and the corresponding controller is applied to the system based on the switching index function with integral property. The closed-loop system stability is established; and the tracking error is proved to be asymptotically convergent. Simulation results confirm the validity of the proposed method.
Fabrication ofChitosan―nanohydroxyapatite Scaffolds viaLow―temperature Deposition Manufacturing
ZHENGXiong-Fei, ZHAI Wen-Jie, LIANG Ying-Chun, SUN Tao
无机材料学报 , 2010, DOI: 10.3724/sp.j.1077.2011.00012
Abstract: To meetthe requirement of scaffold in bone tissue engineering with controllable macroand micro pores and good mechanical properties, chitosan―nanohydroxyapatite 3Dporous scaffolds were fabricated by low― temperature depositionmanufacturing. A load force driven injecting nozzle was proposed and developedto extrude natural derived polymers. Strand of biomaterials was extruded steady,uniformly and bonded to each other well. Hierarchial structure of scaffold wasstudied. Morphology of scaffold’s pores contains macropores and micropores. Macroporesare fabricated controllably according to fabricating path. Morphology of microporesare affected by materials ratio and fabricating temperature, cross―link, etc. A higher nanohydroxyapatite ratioleads to smaller micropores. Larger micropores are obtained under lowerfabriacating temperature. Cross―link causes micropores become smaller. Resultsof in vitro mouse MC3T3―E1 cellculture studies reveal a good biocompatibility for a high nanohydroxyapatitecontent scaffold. The regular and highly interconnected macropores ensure cellsto migrate into the center of 3D scaffold.
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