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    题名 作者 年代 出处 被引量
1Differentiation of isolated human umbilical cord mesenchymal stem cells into neural stem cells显示文摘AIM:To investigate whether umbilical cord human mesenchymal stem cell(UC-MSC)was able to differentiate into neural stem cell and neuron in vitro.·METHODS:The umbilical cords were obtained from pregnant women with their written consent and the approval of the Clinic Ethnics Committee.UC-MSC were isolated by adherent culture in the medium contains 20%fetal bovine serum(FBS),then they were maintained in the medium contain 10%FBS and induced to neural cells in neural differentiation medium.We investigated whether UC-MSC was able to differentiate into neural stem cell and neuron in vitro by using flow cytometry,reverse transcriptase-polymerase chain reaction(RT-PCR)and immunofluorescence(IF)analyzes.·RESULTS:A substantial number of UC-MSC was harvested using the tissue explants adherent method at about 2wk.Flow cytometric study revealed that these cells expressed common markers of MSCs,such as CD105(SH2),CD73(SH3)and CD90.After induction of differentiation of neural stem cells,the cells began to form clusters;RT-PCR and IF showed that the neuron specific enolase(NSE)and neurogenic differentiation 1-positive cells reached 87.3%±14.7%and 72.6%±11.8%,respectively.Cells showed neuronal cell differentiation after induced,including neuron-like protrusions,plump cell body,obviously and stronger refraction.RT-PCR and IF analysis showed that microtubule-associated protein 2(MAP2)and nuclear factor-M-positive cells reached 43.1%±10.3%and 69.4%±19.5%,respectively.·CONCLUSION:Human umbilical cord derived MSCscan be cultured and proliferated in vitro and differentiate into neural stem cells,which may be a valuable source for cell therapy of neurodegenerative eye diseases.Song Chen Wei Zhang Ji-Ming Wang Hong-Tao Duan Jia-Hui Kong Yue-Xin Wang Meng Dong Xue Bi Jian Song 2016International Journal of Ophthalmology(English edition)2016,9,1:22
2Ethnopharmacology, Phytochemistry, Pharmacology, Toxicology and Clinical Applications of Radix Astragali显示文摘Radix Astragali(RA),a traditional Chinese medicine from the dried root of Astragalus species,is widely distributed throughout the temperate regions of the world.The major bioactive constituents of RA are triterpene glycosides,flavonoids,saponins,and alkaloids,and these compounds mostly exert pharmacological activities on the cardiovascular,immune,respiratory,and hepatic systems.This review summarizes the recent studies on RA and provides a comprehensive summary regarding the status of resources,ethnopharmacology,phytochemistry,pharmacology,toxicology,clinical application,and patent release of RA.We hope this review can provide a guidance for further development of therapeutic agents from RA.ZHANG Chun-hong YANG Xiao WEI Jing-ran CHEN Na-mu-han XU Jian-ping BI Ya-qiong YANG Min GONG Xue LI Zi-yan REN Kai HAN Qi-heng ZHANG Lei LI Xue JI Ming-yue WANG Cong-cong LI Min-hui 2021Chinese Journal of Integrative Medicine2021,27,3:16
3Serum Uric Acid is Associated with the Predicted Risk of Prevalent Cardiovascular Disease in a Community-dwelling Population without Diabetes显示文摘Objective To examine the association between serum uric acid levels and cardiovascular disease risk among individuals without diabetes. Methods We investigated the association between serum uric acid levels and the risk of prevalent cardiometabolic diseases, 10-year Framingham risk for coronary heart disease, and 10-year risk for atherosclerotic cardiovascular diseases(ASCVD) among 8,252 participants aged ≥ 40 years without diabetes from Jiading district, Shanghai, China. Results Body mass index, waist circumference, blood glucose, glycated hemoglobin, blood pressure, and serum lipids increased progressively across the sex-specific quartiles of uric acid(all P trend < 0.05). Compared with individuals in the lowest quartile, those in the higher quartiles had a significantly higher prevalence of obesity, hypertension, and dyslipidemia(all P trend < 0.05). A fully adjusted logistic regression analysis revealed that individuals in the highest quartile had an increased risk of predicted cardiovascular disease compared with those in the lowest quartile of uric acid. The multivariate adjusted odds ratios(ORs) [95% confidence intervals(CIs)] for the highest quartiles for high Framingham risk were 3.00(2.00-4.50) in men and 2.95(1.08-8.43) in women. The multivariate adjusted ORs(95% CIs) for the highest quartile for high ASCVD risk were 1.93(1.17-3.17) in men and 4.53(2.57-7.98) in women. Conclusion Serum uric acid level is associated with an increased risk of prevalent obesity, hypertension, dyslipidemia, 10-year Framingham risk for coronary heart disease, and 10-year risk for ASCVD among Chinese adults without diabetes.CHENG Di DU Rui WU Xue Yan LIN Lin PENG Kui MA Li Na XU Yu XU Min CHEN Yu Hong BI Yu Fang WANG Wei Qing DAI Meng LU Jie Li 2018Biomedical and Environmental Sciences2018,31,2:13
4Phosphorus oxoanion-intercalated layered double hydroxides for high-performance oxygen evolution显示文摘合理设计和为氧进化反应(OER ) 的有效、划算的电极的控制制造为探讨崭新的精力危机是批评的。有特定的夹层阴离子的镍铁分层的双氢氧化物(NiFe-LDHs )( 即磷酸盐,亚磷酸盐,和次磷酸盐) 被一个一起沉淀方法制作并且作为氧进化 electrocatalysts 调查了。磷 oxoanion 的置闰在一个碱的答案提高了 OER 活动;最佳的表演(即, 215 mV, 37.7 mV/dec 的一个小 Tafel 斜坡,和稳定的电气化学的行为的一个低发作潜力) 与设置次磷酸盐的 NiFe-LDH 催化剂被完成,在传统的设置碳酸盐的 NiFe-LDH 上的示威戏剧的改进以活动和耐久性。这提高的表演被归因于在设置的磷的 oxoanions 和分享边的瞬间 6 之间的相互作用(M = Ni, Fe ) 层,它修改表面 Ni 地点的电子结构。这个概念应该为更有效的基于 LDH 的氧进化 electrocatalysts 的设计是鼓舞人心的。Ma Luo Zhao Cai Cheng Wang Yongmin Bi Li Qian Yongchao Hao Li Li Yun Kuang Yaping Li Xiaodong Lei Ziyang HUO Wen Liu Hailiang Wang Xiaoming Sun Xue Duan 2017Nano Research2017,10,5:12
5On the mechanism and control for the ultra-low frequency oscillation in NY Power Grid with large-scale hydropower显示文摘The power grid with large proportion of hydropower may engage the ultra-low frequency oscillation (ULFO),which threatening the operation of system.To the NY Power Grid system,whose dimension is over thousands,this paper reveals the cause of ULFO with the phase portrait method,i.e.,lies in the saturation of the different limits of the governor system of the generators,in other words,the occurrence of limit cycle is due to the non-smooth bifurcation.And furthermore,it proposes two methods to suppress ULFO with the philosophy of destroying the condition of non-smooth bifurcation.In detail,first,the phenomenon of ULFO in NY Power Grid,the damping characteristics and the limits in the governor system of the hydropower units are presented.Second,based on the non-smooth bifurcation theory,the mathematical basis of the oscillation in the non-smooth system caused by the saturation of limits is introduced.And then,the non-oscillation and oscillation dynamic of the system corresponding to without/with limits in the governor system are analyzed.Furthermore,it discusses the influence of the saturation of single limit on the characteristics of ULFO with the phase portraits.Moreover,the phase portraits of the ULFO under different faults is analyzed,and it shows that the limiting saturation occurs with a large enough disturbance.Thus,the ULFO is resulting from the negative damping of generation and the saturation of multiple limits under a large enough disturbance.In addition,according to the above mechanism,two strategies to suppress the ULFO,i.e.,the governor parameters tuning and the fault strength relief are designed.The simulation shows the effectiveness of proposed strategies.Ancheng XUE Jiawei WANG Chao ZHENG Joe H.CHOW Tianshu BI 2019Control Theory and Technology2019,17,3:11
6Baicalin attenuates blood-spinal cord barrier disruption and apoptosis through PI3K/Akt signaling pathway after spinal cord injury显示文摘Baicalin is a natural active ingredient isolated from Scutellariae Radix that can cross the blood-brain barrier and exhibits neuroprotective effects on multiple central nervous system diseases.However,the mechanism behind the neuroprotective effects remains unclear.In this study,rat models of spinal cord injury were established using a modified Allen's impact method and then treated with intraperitoneal injection of Baicalin.The results revealed that Baicalin greatly increased the Basso,Beattie,Bresnahan Locomotor Rating Scale score,reduced blood-spinal cord barrier permeability,decreased the expression of Bax,Caspase-3,and nuclear factorκB,increased the expression of Bcl-2,and reduced neuronal apoptosis and pathological spinal cord injury.SH-SY5 Y cell models of excitotoxicity were established by application of 10 m M glutamate for 12 hours and then treated with 40μM Baicalin for 48 hours to investigate the mechanism of action of Baicalin.The results showed that Baicalin reversed tight junction protein expression tendencies(occludin and ZO-1)and apoptosis-related protein expression(Bax,Bcl-2,Caspase-3,and nuclear factor-κB),and also led to up-regulation of PI3 K and Akt phosphorylation.These effects on Bax,Bcl-2,and Caspase-3 were blocked by pretreatment with the PI3 K inhibitor LY294002.These findings suggest that Baicalin can inhibit bloodspinal cord barrier permeability after spinal cord injury and reduce neuronal apoptosis,possibly by activating the PI3 K/Akt signaling pathway.This study was approved by Animal Ethics Committee of Xi'an Jiaotong University on March 6,2014.Rui Zhao Xue Wu Xue-Yuan Bi Hao Yang Qian Zhang 2022Neural Regeneration Research2022,17,5:9
7Effects of Chinese herbal medicine on plasma glucose,protein and energy metabolism in sheep显示文摘Background:The use of antibiotics in animal diets is facing negative feedback due to the hidden danger of drug residues to human health.Traditional Chinese herbal medicine has been used to replace antibiotics in the past two decades and played an increasingly important role in livestock production.The present study was carried out to assess the feeding effects of a traditional nourishing Chinese herbal medicine mixture on kinetics of plasma glucose,protein and energy metabolism in sheep.Ruminal fermentation characteristics were also determined.Methods:Four sheep were fed on either mixed hay(MH-diet) or MH-diet supplemented with 2%of Chinese herbal medicine(mixture of Astragalus root,Angelica root and Atractylodes rhizome;CHM-diet) over two 35-day periods using a crossover design.The turnover rate of plasma glucose was measured with an isotope dilution method using[U-^(13)C]glucose.The rates of plasma leucine turnover and leucine oxidation,whole body protein synthesis(WBPS)and metabolic heat production were measured using the[1-^(13)C]leucine dilution and open circuit calorimetry.Results:Body weight gain of sheep was higher(P=0.03) for CHM-diet than for MH-diet.Rumen pH was lower(P=0.02),concentration of rumen total volatile fatty acid tended to be higher(P=0.05) and acetate was higher(P=0.04) for CHM-diet than for MH-diet.Turnover rates of plasma glucose and leucine did not differ between diets.Oxidation rate of leucine tended to be higher(P =0.06) for CHM-diet than for MH-diet,but the WBPS did not differ between diets.Metabolic heat production tended to be greater(P=0.05) for CHM-diet than for MH-diet.Conclusions:The sheep fed on CHM-diet had a higher body weight gain and showed positive impacts on rumen fermentation and energy metabolism without resulting in any adverse response.Therefore,these results suggested that the Chinese herbal medicine mixture should be considered as a potential feed additive for sheep.Xi Liang Kyota Yamazaki Mohammad Kamruzzaman Xue Bi Arvinda Panthee Hiroaki Sano 2014Journal of Animal Science and Biotechnology2014,5,3:8
8Radar Target Recognition Algorithm Based on RCS Observation Sequence——Set-Valued Identification Method显示文摘This paper studies the problem of radar target recognition based on radar cross section(RCS)observation sequence.First,the authors compute the discrete wavelet transform of RCS observation sequence and extract a valid statistical feature vector containing five components.These five components represent five different features of the radar target.Second,the authors establish a set-valued model to represent the relation between the feature vector and the authenticity of the radar target.By set-valued identification method,the authors can estimate the system parameter,based on which the recognition criteria is given.In order to illustrate the efficiency of the proposed recognition method,extensive simulations are given finally assuming that the true target is a cone frustum and the RCS of the false target is normally distributed.The results show that the set-valued identification method has a higher recognition rate than the traditional fuzzy classification method and evidential reasoning method.WANG Ting BI Wenjian ZHAO Yanlong XUE Wenchao 2016Journal of Systems Science & Complexity2016,29,3:7
9Toxicity of Multi-Walled Carbon Nanotubes,Graphene Oxide,and Reduced Graphene Oxide to Zebrafish Embryos显示文摘Objective This study was aimed to investigate the toxic effects of 3 nanomaterials, i.e. multi-walled carbon nanotubes(MWCNTs), graphene oxide(GO), and reduced graphene oxide(RGO), on zebrafish embryos. Methods The 2-h post-fertilization(hpf) zebrafish embryos were exposed to MWCNTs, GO, and RGO at different concentrations(1, 5, 10, 50, 100 mg/L) for 96 h. Afterwards, the effects of the 3 nanomateria on spontaneous movement, heart rate, hatching rate, length of larvae, mortality, and malformations ls were evaluated. Results Statistical analysis indicated that RGO significantly inhibited the hatching of zebrafish embryos. Furthermore, RGO and MWCNTs decreased the length of the hatched larvae at 96 hpf. No obvious morphological malformation or mortality was observed in the zebrafish embryos after exposure to the three nanomaterials. Conclusion MWCNTs, GO, and RGO were all toxic to zebrafish embryos to influence embryos hatching and larvae length. Although no obvious morphological malformation and mortality were observed in exposed zebrafish embryos, further studies on the toxicity of the three nanomaterials are still needed.LIU Xiao Tong MU Xi Yan WU Xiao Li MENG Li Xuan GUAN Wen Bi MA Yong Qiang SUN Hua WANG Cheng Ju LI Xue Feng 2014Biomedical and Environmental Sciences2014,27,9:6
10Effects of redox-active interlayer anions on the oxygen evolution reactivity of NiFe-layered double hydroxide nanosheets显示文摘镍铁分层的双氢氧化物(NiFe-LDH ) nanosheets 显示出最佳的氧进化反应(OER ) 性能;然而,在 OER 活动的设置的离子的角色仍然保持不清楚。在这个工作,我们证明 NiFe-LDHs 的活动能被设置的阴离子与不同氧化还原作用潜力定制。而 NiFe-LDHs 与高氧化还原作用潜力(低减少能力)的阴离子设置了,有低氧化还原作用潜力(高减少能力)的阴离子的置闰例如次磷酸盐,与 240 mV 的低 OER 过电位和 36.9 mV/dec 的一个小 Tafel 斜坡导致 NiFe-LDHs ,例如 fluorion ,显示出 370 mV 的高过电位和 80.8 mV/dec 的一个 Tafel 斜坡。OER 活动与标准氧化还原作用潜力显示出令人吃惊的线性关联。密度功能的理论计算和 X 光检查光电子光谱学分析显示设置的阴离子改变在表面暴露了的金属原子的电子结构。有低标准氧化还原作用潜力和强壮的减少能力的阴离子把更多的电子转移到氢氧化物层。这增加表面金属地点的电子密度并且稳定他们的高原子价的状态,其形成在 OER 过程以前作为关键步被知道。Daojin Zhou Zhao Cai Yongmin Bi Weiliang Tian Ma Luo Qian Zhang Qixian Xie Jindi Wang Yaping Li Yun Kuang Xue Duan Michal Bajdich Samira Siahrostami Xiaoming Sun 2018Nano Research2018,11,3:6
11Boron modulating electronic structure of FeN4C to initiate high-efficiency oxygen reduction reaction and high-performance zinc-air battery显示文摘The biggest challenge is to develop a low cost and readily available catalyst to replace expensive commercial Pt/C for efficient electrochemical oxygen reduction reaction(ORR).In this research,closo-[B_(12)H_(12)]^(2−)and 1,10-phenanthroline-iron complexes were introduced into the porous metal-organic framework by impregnation method,and further annealing treatment achieved the successful anchoring of single-atom-Fe in B-doped CN Matrix(FeN4CB).The ORR activity of FeN4CB is comparable to the widely used commercial 20 wt%Pt/C.Where the half-wave potential(E_(1/2))in alkaline medium up to 0.84 V,and even in the face of challenging ORR in acidic medium,the E_(1/2)of ORR driven by FeN4CB is still as high as 0.81 V.When FeN4CB was used as air cathode,the open circuit voltage of Zn-air battery reaches 1.435 V,and the power density and specific capacity are as high as 177 mW cm^(−2)and 800 mAh g_(Zn)^(−1)(theoretical value:820 mAh g_(Zn)^(−1)),respectively.The dazzling point of FeN4CB also appears in the high ORR stability,whether in alkaline or acidic media,E_(1/2)and limiting current density are still close to the initial value after 5000 times cycles.After continuously running the charge-discharge test for 220 h,the charge voltage and discharge voltage of the rechargeable zinc-air battery with FeN4CB as the air cathode maintained the initial state.Density functional theory calculations reveals that introducing B atom to Fe–N4–C can adjust the electronic structure to easily break O=O bond and significantly reduce the energy barrier of the rate-determining step resulting in an improved ORR activity.Xue Zhao Xue Li Zenghui Bi Yuwen Wang Haibo Zhang Xiaohai Zhou Quan Wang Yingtang Zhou Huaisheng Wang Guangzhi Hu 2022Journal of Energy Chemistry2022,31,3:6
12Up‐regulated long non‐coding RNA H19 contributes to proliferation of gastric cancer cells显示文摘Feng Yang Jianwei Bi Xuchao Xue Luming Zheng Kangkang Zhi Jide Hua Guoen Fang 2012FEBS Journal2012,,17:5
13Source apportionment of ambient PM_(10) in urban areas of Wuxi,China显示文摘A total of 168 PM_(10)samples were collected during the year of 2005 at eight sites in the city of Wuxi in China.Fifteen chemical elements,three water-soluble ions,total carbon and organic carbon were analyzed.Six source categories were identified and their contributions to ambient PM_(10)in Wuxi were estimated using a nested chemical mass balance method that reduces the effects of colinearity on the chemical mass balance model.In addition,the concentrations of secondary aerosols,such as secondary organic carbon,sulfate and nitrate,were quantified.The spatially averaged PM_(10)was high in the spring and winter(123μg·m^(-3)and low in the summer-fall(90μg·m^(-3)).According to the result of source apportionment,resuspended dust was the largest contributor to ambient PM_(10),accounting for more than 50%of the PM_(10)mass.Coal combustion(14.6%)and vehicle exhaust(9.4%)were also significant source categories of ambient PM_(10).Construction and cement dust,sulfates,secondary organic carbon,and nitrates made contributions ranging between 4.1%and 4.9%.Other source categories such as steel manufacturing dust and soil dust made low contributions to ambient PM_(10).Bo HAN Xiaohui BI Yonghua XUE Jianhui WU Tan ZHU Baogui ZHANG Jianqing DING Yuanxin DU 2011Frontiers of Environmental Science & Engineering2011,5,4:5
14Current developments in drug delivery with thermosensitive liposomes显示文摘Thermosensitive liposomes(TSLs) have been an important research area in the field of tumor targeted chemotherapy. Since the first TSLs appeared that using 1,2-dipalmitoyl-snglyce-ro-3-phosphocholine(DPPC) as the primary liposomal lipid, many studies have been done using this type of liposome from basic and practical aspects. While TSLs composed of DPPC enhance the cargo release near the phase transition temperature, it has been shown that many factors affect their temperature sensitivity. Thus numerous attempts have been undertaken to develop new TSLs for improving their thermal response performance. The main objective of this review is to introduce the development and recent update of innovative TSLs formulations, including combination of radiofrequency ablation(RFA), highintensity focused ultrasound(HIFU), magnetic resonance imaging(MRI) and alternating magnetic field(AMF). In addition, various factors affecting the design of TSLs, such as lipid composition, surfactant, size and serum components are also discussed.Hongshu Bi Jianxiu Xue Hong Jiang Shan Gao Dongjuan Yang Yan Fang Kai Shi 2019Asian Journal of Pharmaceutical Sciences2019,14,4:5
15Inadequate glycaemic control and antidiabetic therapy among inpatients with type 2 diabetes in Guangdong Province of China显示文摘背景糖尿病 mellitus 在调查的 China.We 在最近的年里变得流行在来自在广东省教医院的十所大学的类型 2 糖尿病的住院病人之中的多糖症和不适当的 glycaemic 控制的流行,中国。当 HbA1c() 6.5%.Therapeutic 政体包括了没有干预,在糖尿病的病人的方法不适当的 glycaemic 控制被定义,生活方式仅仅,口头的 antiglycemic 代理人(OA ) ,加 OA (insulin+OA ) 的胰岛素,或胰岛素仅仅。Antidiabetic 管理包括了 monotherapy,两倍治疗,三元组或四倍的治疗。在有已知的历史的 493 个糖尿病的住院病人之中的结果, 75%had HbA1c6.5%.Inadequate 葡萄糖控制率更经常比在 OA 政体(71%)( PO.001 )上在 insulin+OA 政体(97%)上在病人被看见,并且在联合治疗(81%-96%)上的病人更经常比 monotherapy (75%)( P0.05 ),胰岛素上的 .Patients 由吝啬的 HbA1c , glycemic 控制率,糖尿病持续时间, microvascular 复杂并发症,和 BMI ( P0.01 )在 OA 上与病人显著地不同。这研究看了类型 2 糖尿病的病人的那 glycaemic 控制的结论为胰岛素的收到的胰岛素和开始时间通常是谁的病人败坏了 delayed.It 依赖临床医生从传统的逐步的治疗搬到更活跃、早的联合 antidiabetic 治疗提供更好的葡萄糖控制。BI Yan YAN Jin-hua LIAO Zhi-hong LI Yan-bing ZENG Long-yi TANG Kuan-xiao XUE Yao-ming YANG Hua-zhang LI Lu CAI De-hong WU Ge ZHANG Fan LIN Shao-da XIAO Zheng-hua ZHU Da-long WENG Jian-ping 2008Chinese Medical Journal2008,,8:5
16Association between Lipoprotein(a) Levels and Metabolic Syndrome in a Middle-aged and Elderly Chinese Cohort显示文摘Objective The association between lipoprotein(a)[Lp(a)] levels and metabolic syndrome(MetS) remains uncertain, especially in the Asian population. The purpose of this study was to demonstrate the association between Lp(a) levels and MetS in a middle-aged and elderly Chinese cohort. Methods A cross-sectional study of 10,336 Chinese adults aged 40 years or older was conducted in Jiading District, Shanghai, China. Logistic regression analysis was used to evaluate the association between serum Lp(a) levels and MetS. Results In the overall population, 37.5% of participants had MetS. Compared with individuals in the lowest quartile of serum Lp(a) levels, those in the highest quartile had a lower prevalence of MetS(30.9% vs. 46.9%, P for trend < 0.0001). Multivariate logistic regression analyses showed that compared with participants in the bottom quartile of serum Lp(a) levels, those in the top quartile had decreased odds ratio(OR) for prevalent MetS [multivariate-adjusted OR 0.45(95% confidence interval 0.39-0.51);P < 0.0001]. Additionally, Lp(a) level was conversely associated with the risk of central obesity, high fasting glucose, high triglycerides, and low HDL cholesterol, but not with hypertension. Stratified analyses suggested that increasing levels of Lp(a) was associated with decreased risk of MetS in all the subgroups. Conclusion Serum Lp(a) level was inversely associated with the risk of prevalent MetS in a middle-aged and elderly Chinese cohort.WU Xue Yan LIN Lin Qi Hong Yan DU Rui HU Chun Yan MA Li Na PENG Kui LI Mian XU Yu XU Min CHEN Yu Hong LU Jie Li BI Yu Fang WANG Wei Qing NING Guang 2019Biomedical and Environmental Sciences2019,32,7:5
17Experimental investigation of the thermally induced vibration of a space boom section显示文摘Thermally induced vibration(TIV)is a typical failure of large-scale space structures.This paper reports a laboratory experiment that aims to investigate this unusual structural behavior of complex engineering structures.With the help of a Fourier finite element program,the fixing of a space boom section is well designed so that the TIV can be successfully observed.Although the observed torsional vibration mode is different from the bending vibration mode predicted by the classic theory based on a simple beam model,it can be successfully explained by the general thermal structural interaction theory.This demonstrates the validity of the theoretical model and the necessity of using finite element program to analyze complex engineering structures.SU XinMing ZHANG JunHui WANG Jing BI YanQiang QIE DianFu XIANG ZhiHai XUE MingDe 2015Science China(Physics,Mechanics & Astronomy)2015,58,4:5
18Long noncoding RNA CCAT1, which could be activated by c-Myc, promotes the progression of gastric carcinoma显示文摘Feng Yang Xuchao Xue Jianwei Bi Luming Zheng Kangkang Zhi Yan Gu Guoen Fang 2013Journal of Cancer Research and Clinical Oncology2013,,3:5
19Ultraflat, broadband, and highly coherent supercontinuum generation in all-solid microstructured optical fibers with all-normal dispersion显示文摘High flatness, wide bandwidth, and high-coherence properties of supercontinuum(SC) generation in fibers are crucial in many applications. It is challenging to achieve SC spectra in a combination of the properties, since special dispersion profiles are required, especially when pump pulses with duration over 100 fs are employed. We propose an all-solid microstructured fiber composed only of hexagonal glass elements. The optimized fiber possesses an ultraflat all-normal dispersion profile, covering a wide wavelength interval of approximately 1.55 μm. An SC spectrum spanning from approximately 1030 to 2030 nm(corresponding to nearly one octave) with flatness<3 dB is numerically generated in the fiber with 200 fs pump pulses at 1.55 μm. The results indicate that the broadband ultraflat SC sources can be all-fiber and miniaturized due to commercially achievable 200-fs fiber lasers. Moreover, the SC pulses feature high coherence and a single pulse in the time domain, which can be compressed to 13.9-fs pulses with high quality even for simple linear chirp compensation. The Fourier-limited pulse duration of the spectrum is 3.19 fs, corresponding to only 0.62 optical cycles.CHUNLEI HUANG MEISONG LIAO WANJUN BI XIA LI LILI HU LONG ZHANG LONGFEI WANG GUANSHI QIN TIANFENG XUE DANPING CHEN WEIQING GAO 2018Photonics Research2018,6,6:4
20Expression and Purification of Recombinant Hepatitis Delta Virus(HDV) Antigen for Use in a Diagnostic ELISA for HDV Infection Using the High-Density Fermentation Strategy in Escherichia coli显示文摘Objective Hepatitis Delt a Virus(HDV) antigen is widely used as a capture antigen in ELISAs for the identification of HDV infection; large amounts of recombinant HDV antigen with active antigenicity are required for this purpose. Methods Reconstruct the gene of HDV antigen based on the bias code of Escherichia coli, the recombinant protein expresses by high-density fermentation with fed-batch feeding strategy, and purify by immobilized metal chromatography. The sensitivity and specificity of this antigen detect by ELISA method. Results The expression of HDV antigen can reach 20% of the total cell mass in the soluble form. The recombinant HDV antigen can be conveniently purified(98%) by immobilized metal ion affinity chromatography(IMAC) using the interaction between a His-tag and nickel ions. Production of recombinant HDV antigen can reach 0.5 g/L under conditions of high-density cell fermentation. Applied to the diagnostic ELISA method, the recombinant HDV antigen shows excellent sensitivity(97% for IgM and 100% for IgG) and specificity(100% for IgG and IgM) for the detection of anti-HDV antibodies. Conclusion Expression and purification the recombinant HDV antigen as a candidate protein for application in a diagnostic ELISA for HDV infection. Large-scale production of the protein can be achieved using the high-density fermentation strategy.LU Xue Xin YI Yao SU Qiu Dong BI Sheng Li 2016Biomedical and Environmental Sciences2016,29,6:4
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