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1Quantitative analysis of vascular endothelial growth factor, microvascular density and their clinicopathologic features in human hepatocellular carcinoma显示文摘BACKGROUND: Angiogenesis is known to be essential to the survival, growth, invasion, and metastasis of tumor cells. Vascular endothelial growth factor (VEGF) are an important angiogenic factor regulating tumor angiogenesis, but its significance and tumor pathologic features are un- clear in hepatocellular carcinoma (HCC). In the present study, we analyzed expression of tissue VEGF, alteration of microvascular density (MVD) in microvessel angiogenesis, development and metastasis of HCC, and level of serum VEGF in differential diagnosis of benign and malignant liv- er diseases. METHODS: Tumor specimens were prospectively collected from HCC patients undergoing resection. Total RNAs were extracted and the expression levels were detected from different parts of HCC tissues. The cellular distributions of VEGF and MVD of liver tumors and their paracancerous and distal cancerous tissues were investigated by streptavi- din peroxidase (S-P) immunohistochemistry, respectively. The VEGF levels of circulating blood and hepatoma tissues were measured by enzyme-linked immunosorbent assay. RESULTS: The incidence of VEGF expression was 63.9% in HCCs (23/36 cases), 78.3% in non-encapsulated HCCs (18/23), and 90.9% in HCCs with extrahepatic metastasis (10/11), respectively. The VEGF expression was tightly correlated with MVD (P <0.01). The MVD in HCC with metastasis, low differentiation or non-encapsulation was significantly higher than that in HCC with intact capsule, high differentiation, or no metastasis. No significant diffe- rence was found between VEGF, MVD, tumor size, and hepatitis virus infection. The level of total RNA in HCC tis- sues was significantly lower but the VEGF level significantly higher than those in paracancerous or distal cancerous ones (P<0.01). The abnormal expression levels of VEGF in sera of HCC patients were directly correlated with the me- tastasis and recurrence of tumors. CONCLUSION: The high expression of VEGF and abnor- mality of tissue MVD are useful predictors for vascular inva- sion and metastasis of liver tumors.Deng-Fu Yao, Xin-Hua Wu, Yong Zhu, Gong-Sheng Shi, Zhi-Zhen Dong, Deng-Bing Yao, Wei Wu, Li-Wei Qiu and Xian-Yong Meng Nantong, China Research Center of Clinical Molecular Biology , Department of Pathology and Department of Gastroenterology , Affiliated Hos- pital of Nantong University Department of Diagnostics , and Institute of Neurosciences , Nantong University Nantong 226001, China 2005Hepatobiliary & Pancreatic Diseases International2005,4,2:81
2Hepatic artery infusion chemotherapy using mFOLFOX versus transarterial chemoembolization for massive unresectable hepatocellular carcinoma:a prospective non.randomized study显示文摘Background: Transarterial chemoembolization(TACE) is recommended as the standard care for unresectable hepatocellular carcinoma(HCC) at Barcelona Clinic Liver Cancer(BCLC) stage A-B. However, the efficacy of TACE on large(> 10 cm) stage A-B HCC is far from satisfactory, and it is proposed that hepatic artery infusion chemotherapy(HAIC)might be a better first-line treatment of this disease. Hence, we compared the safety and efficacy of HAIC with the modified FOLFOX(mFOLFOX) regimen and those ofTACE in patients with massive unresectable HCC.Methods: A prospective, non-randomized, phase II study was conducted on patients with massive unresectable HCC. The protocol involved HAIC with the mFOLFOX regimen(oxaliplatin, 85 mg/m^2 intra-arterial infusion; leucovorin,400 mg/m^2 intra-arterial infusion; and fluorouracil, 400 mg/m2 bolus infusion and 2400 mg/m^2 continuous infusion)every 3 weeks and TACE with 50 mg of epirubicin, 50 mg of lobaplatin, 6 mg of mitomycin, and lipiodol and polyvinyl alcohol particles. The tumor responses, time-to-progression(TTP), and safety were assessed.Results: A total of 79 patients were recruited for this study: 38 in the HAIC group and 41 in the TACE group. The HAIC group exhibited higher partial response and disease control rates than did the TACE group(52.6% vs. 9.8%, P < 0.001;83.8% vs. 52.5%, P = 0.004). The median TTPs for the HAIC and TACE groups were 5.87 and 3.6 months(hazard radio[HR] = 2.35,95% confidence interval [CI] = 1.16-4.76, P = 0.015). More patients in the HAIC group than in the TACE group underwent resection(10 vs. 3,P = 0.033). The proportions of grade 3-4 adverse events(AE) and serious adverse events(SAE) were lower in the HAIC group than in the TACE group(grade 3-4 AEs: 13 vs. 27, P = 0.007;SAEs: 6 vs. 15,p = 0.044). More patients in the TACE group than in the HAIC group had the study treatment terminated early due to intolerable treatment-related adverse events or the withdrawal of consent(10 vs. 2,P = 0.026).Conclusions: HAIC with mFOLFOX yielded significantly better treatment responses and less serious toxicity than did TACE. HAIC might represent a feasible and promising first-line treatment for patients with massive unresectable HCC.Min-Ke He Yong Le Qi-Jiong Li Zi-Shan Yu Shao-Hua Li Wei Wei Rong-Ping Guo Ming Shi 2017Chinese Journal of Cancer2017,36,12:95
3Advances in the study of berberine and its derivatives: a focus on anti-inflammatory and anti- tumor effects in the digestive system显示文摘它广泛地被认出了那发炎,特别地长期的发炎,能增加癌症的风险并且发炎和癌症的同时的治疗可以生产优秀治疗学的效果。Berberine,从根茎 coptidis 孤立的碱,有宽广应用程序,特别地作为在有长历史的诊所的一个抗菌剂代理人。在过去的十年,许多报告证明了这个自然产品和它的衍生物对癌症和发炎举办高活动。在这评论,我们在在消化系统装饰 berberine 和它同样反煽动性的衍生物和反肿瘤代理人总结进展;我们也讨论他们的结构活动关系。这些数据应该作为有反发炎活动的新奇 anticancer 药为这个自然产品的发展是有用的。Kun ZOU Zhao LI Yong ZHANG Hao-yue ZHANG Bo LI Wei-liang ZHU Ji-ye SHI Qi JIA Yi-ming LI 2017Acta Pharmacologica Sinica2017,38,2:58
4Epidemiology and risk factors of colorectal cancer in China显示文摘In China, colorectal cancer(CRC) ranked fourth and fifth in the highest incidence and mortality rates of all malignancies in 2018, respectively. Although these rates are below the world average, China placed first worldwide in the number of new CRC cases and CRC-related deaths because of its comparatively large population. This disease represents a threat to the health of population and incurs a heavy economic burden on the society and individuals. CRC has various risk factors, including age, sex, lifestyle, genetic factors, obesity, diabetes, gut microbiota status, and precancerous lesions. Furthermore, incidence and mortality rates of CRC are closely related to socioeconomic development levels, varying according to regional and population characteristics. Prevention is the main strategy to reduce incidence and mortality rates of CRC. This can be achieved through strategies stimulating lifestyle changes, healthy diet habits, and early screening for high-risk individuals. To reduce the burden of CRC, public health officials should promote prevention and management of modifiable risk factors through national policies. The rising incidence and mortality rates of CRC in China may be timely curbed by clarifying specific epidemiological characteristics, optimizing early screening strategies, and strictly implementing diagnosis and treatment guidelines. Thus, this study aimed to collect and report the current research status on epidemiology and risk factors of CRC in China.Yong Yang Zihan Han Xin Li An Huang Jingyi Shi Jin Gu 2020Chinese Journal of Cancer Research2020,32,6:42
5In vitro derivation of functional insulin-producing cells from human embryonic stem cells显示文摘为人的胚胎的茎(ES ) 的自强和区别的能力细胞为对待类型 Idiabetes mellitus 为胰腺的贝它细胞的产生使他们成为潜在的来源。这里,我们报导一最新发展了并且有效方法,在aserum免费的系统执行了,区分进生产胰岛素的 cells.Activin A 的导致的人的 ES 房间它在起始的阶段被使用从人的 EScells 导致权威的内胚叶区别,是由权威的内胚叶标记 Sox17 和 Brachyury.Further 的表示检测了, all-trans retinoic 酸( RA )被用来支持胰腺的区别,由早胰腺的抄写因素 pdx1 和 hlxb9 的表示显示了。在成熟 inDMEM/F12 以后有 bFGF 和菸碱的没有浆液的媒介,区分的房间表示了小岛特定的标记象 C 肽,胰岛素,胰高血糖素和 glut2 那样。百分比 ofC-peptide-positive 房间超过了 15% 。由这些房间的胰岛素和 C 肽的分泌物在葡萄糖层次对应于变化。当移植了进肾的囊时, ofStreptozotocin (STZ ) 对待裸体老鼠,这些区分的人的 ES 房间熬过并且维持贝它房间标记基因的表示包括 C 肽, pdx1, glucokinase, nkx6.1, IAPP, pax6and Tcf1。百分之三十只移植裸体老鼠展出了 stableeuglycemia 的明显的恢复;并且改正的显型被支撑超过六个星期。我们的新方法为学习人的胰开发的机制提供一个有希望的试管内区别模特儿并且说明为类型 Idiabetes mellitus 的处理使用人的 ES 房间的潜力。Wei Jiang Yan Shi Dongxin Zhao Song Chen Jun Yong Jing Zhang Tingting Qing Xiaoning Sun Peng Zhang Mingxiao Ding Dongsheng Li Hongkui Deng 2007Cell Research2007,17,4:38
6Pachytene piRNAs instruct massive mRNA elimination during late spermiogenesis显示文摘在哺乳动物的精子发生被 piRNA 表示的二个波浪描绘:一个人对应于负责的经典 piRNAs 因为 silencing retrotransponsons 和第二个波浪主要在 pachytene spermatocytes 从 nontransposon intergenic 区域被导出,但是这些 pachytene piRNAs 的功能大部分是未知的。这里,我们在在老鼠伸长指示巨大的 mRNA 消除报导 pachytene piRNAs 的参与 spermatids (ES ) 。我们证明包含鼠科的 PIWI (MIWI ) 和 deadenylase CAF1 的导致 piRNA 的 silencing 建筑群(pi-RISC ) 有选择地在 ES 被装配,它负责经由在体的房间类似于 miRNAs 的行动的机制导致 mRNA deadenylation 和腐烂。如此的一个高度安排的节目看起来充分利用 pachytene piRNAs 的能力从 nontransposon intergenic 区域导出的多样化的指向的庞大的全部剧目。这些调查结果建议 pachytene piRNAs 负责为精子生产作准备,从 ES 使广阔细胞的节目失去活性。Lan-Tao Gou Peng Dai Jian-Hua Yang Yuanchao Xue Yun-Ping Hu Yu Zhou Jun-Yan Kang Xin Wang Hairi Li Min-Min Hua Shuang Zhao Si-Da Hu Li-Gang Wu Hui-Juan Shi Yong Li Xiang-Dong Fu Liang-Hu Qu En-Duo Wang Mo-Fang Liu 2014Cell Research2014,24,6:39
7Artesunate synergizes with sorafenib to induce ferroptosis in hepatocellular carcinoma显示文摘Sorafenib is the first-line medication for advanced hepatocellular carcinoma(HCC),but it can only extend limited survival.It is imperative to find a combination strategy to increase sorafenib efficacy.Artesunate is such a preferred candidate,because artesunate is clinically well-tolerated and more importantly both drugs can induce ferroptosis through different mechanisms.In this study we investigated the combined effect of sorafenib and artesunate in inducing ferroptosis of HCC and elucidated the involved molecular mechanisms.We showed that artesunate greatly enhanced the anticancer effects of low dose of sorafenib against Huh7,SNU-449,and SNU-182 HCC cell lines in vitro and against Huh7 cell xenograft model in Balb/c nude mice.The combination index method confirmed that the combined effect of sorafenib and artesunate was synergistic.Compared with the treatment with artesunate or sorafenib alone,combined treatment induced significantly exacerbated lipid peroxidation and ferroptosis,which was blocked by N-acetyl cysteine and ferroptosis inhibitors liproxstatin-1 and deferoxamine mesylate,but not by inhibitors of other types of cell death(z-VAD,necrostatin-1 and belnacasan).In Huh7 cells,we demonstrated that the combined treatment induced oxidative stress and lysosome-mediated ferritinophagy,two essential aspects of ferroptosis.Sorafenib at low dose mainly caused oxidative stress through mitochondrial impairments and SLC7A11-invovled glutathione depletion.Artesunate-induced lysosome activation synergized with sorafenib-mediated pro-oxidative effects by promoting sequential reactions including lysosomal cathepsin B/L activation,ferritin degradation,lipid peroxidation,and consequent ferroptosis.Taken together,artesunate could be repurposed to sensitize sorafenib in HCC treatment.The combined treatment can be easily translated into clinical applications.Zhong-jie Li Hui-qi Dai Xiao-wei Huang Ji Feng Jing-huan Deng Zi-xuan Wang Xiao-mei Yang Yu-jia Liu Yong Wu Pan-hong Chen Huan Shi Ji-gang Wang Jing Zhou Guo-dong Lu 2021Acta Pharmacologica Sinica2021,42,2:31
8Stenting for symptomatic intracranial arterial stenosis in China:1-year outcome of a multicentre registry study显示文摘background and purpose A multicentre prospective registry study of individually tailored stenting for a patient with symptomatic intracranial atherosclerotic stenosis(ICAS)combined with poor collaterals in China showed that the short-term safety and efficacy of stenting was acceptable.However,it remained uncertain whether the low event rate could be of a long term.We reported the 1-year outcome of this registry study to evaluate the long-term efficacy of individually tailored stenting for patients with severe symptomatic ICAS combined with poor collaterals.Methods Patients with symptomatic ICAS caused by 70%-99% stenosis located at the intracranial internal carotid,middle cerebral,intracranial vertebral or basilar arteries combined with poor collaterals were enrolled.Balloon-mounted stent or balloon plus self-expanding stent were selected based on the ease of vascular access and lesion morphology determined by the operators.The primary outcome was the rate of 30-day stroke,transient ischaemic attack and death,and 12-month ischaemic stroke within the same vascular territory,haemorrhagic stroke and vascular death after stenting.results From September 2013 to January 2015,300 patients(ages 58.3±9.78 years)were recruited.Among them,159 patients were treated with balloon-mounted stent and 141 with balloon plus self-expanding stent.During the 1-year follow-up,25 patients had a primary end point event.The probability of primary outcome at 1 year was 8.1%(95% CI 5.3% to 11.7%).In 76 patients with digital subtraction angiography follow-up,27.6%(21/76)had re-stenosis≥50% and 18.4%(14/76)had re-stenosis≥70%.No baseline characteristic was associated with the primary outcome.Conclusion The event rate remains low over 1 year of individually tailored stenting for patients with severe symptomatic ICAS combined with poor collaterals.Further randomised trial of comparing individually tailored stenting with best medical therapy is needed.Ning Ma Yong Zhang Jie Shuai Changchun Jiang Qiyi Zhu Kangning Chen Li Liu Baomin Li Xiangqun Shi Lianbo Gao Yajie Liu Feng Wang Yongli Li Tieyan Liu Hongbo Zheng Dapeng Mo Feng Gao Yilong Wang Yongjun Wang Lei Feng Zhongrong Miao 2018Stroke & Vascular Neurology2018,3,3:29
9The application of large volume airgun sources to the onshore-offshore seismic surveys: implication of the experimental results in northern South China Sea显示文摘Onshore-offshore seismic experiments were carried out for the first time in northern South China Sea using large volume airgun sources at sea and seismic stations on land. The experimental results indicate that seismic signals from the new airgun array of R/V Shiyan 2 can be detected as far as 255 km. The signal effective area reaches nearly 50000 km2, which covers Hong Kong and Pearl River Delta. Compared with the old airgun array, the signal amplitude, propagation distance and effective area of the new airgun array have been increased notably, which demonstrates that the upgrade of the airgun source was successful. Comparisons with previous experimental results in other regions show that the shooting effect of the new airgun array is similar to those best airgun sources in the world. Especially, it is a new breakthrough in using the permanent seismic stations onshore to record long distance airgun signals offshore, which has great significance to the realization of the 'seismic radar' concept and the 3D seismic surveys of crustal structure in coastal areas.QIU XueLin CHEN Yong ZHU RiXiang XU HuiLong SHI XiaoBin YE ChunMing ZHAO MingHui XIA ShaoHong 2007Chinese Science Bulletin2007,52,4:27
10Transduction of Fas gene or Bcl-2 antisense RNA sensitizes cultured drug resistant gastric cancer cells to chemotherapeutic drugs显示文摘INTRODUCTIONChemotherapyisoneofthemajormethodsintumortreatment,butitoftendoesnotworkduetomultidrugresistance(MDR).Recentstudi...XIAO Bing, SHI Yong Quan, ZHAO Yan Qiu, YOU Han, WANG Zuo You, LIU Xian Ling, YIN Fang, QIAO Tai Dong and FAN Dai Ming 1998World Journal of Gastroenterology1998,4,5:24
11Diagnostic efficiency and complication rate of CT-guided lung biopsy: a single center experience of the procedures conducted over a 10-year period显示文摘计算断层摄影术( CT )指导了的背景 transthoracic 肺活体检视是一种生长得很好的技术因为这研究客观的肺的 lesions.The 的诊断是在中国 population.Methods 评估诊断效率和 指导CT 的肺活体检视的复杂并发症率 指导CT 的切针肺活体检视在在1月之间的 1014 个病人上在我们的机构被执行 2000 并且2010年10月 .A 胸拍被像关于基本耐心的信息的 biopsy.Data ,最后的 diagn 仅仅 53 个病人没得到期末考试 biopsy.Final 诊断的从肺的诊断在 131 个病人发现 639 恶意的损害( 63.0 )和 322 良性的损害( 31.8 ) .Pneumothoraxoccurred ,脊间的 drain.Small hemoptysis 的 15 要求的插入在 41 个病人发生了,温和 parenchymal 出血处于 16 patients.The 外套复杂并发症率发生了肺的损害的 指导CT 的切针活体检视是的 18.5 .Conclusions 有高诊断的 accuracy.ItYUAN Dong-mei LU Yan-ling YAO Yan-wen LIU Hong-bing WANG Qian XIAO Xin-wu CAO E-hong SHI Yi ZHOU Xiao-jun t SONG Yong 2011Chinese Medical Journal2011,,20:22
12Wireless Communications with Programmable Metasurface:Transceiver Design and Experimental Results显示文摘Metasurfaces have drawn significant attentions due to their superior capability in tailoring electromagnetic waves with a wide frequency range, from microwave to visible light. Recently, programmable metasurfaces have demonstrated the ability of manipulating the amplitude or phase of electromagnetic waves in a programmable manner in real time, which renders them especially appealing in the applications of wireless communications. In this paper, we present the fundamental principle of applying programmable metasurface as transmitter for wireless communications. Then, we establish a prototype system of metasurface-based transmitter to conduct several experiments and measurements over the air, which practically demonstrate the feasibility of using programmable metasurfaces in future communication systems. By exploiting the dynamically controllable property of programmable metasurface, the design, implementation and experimental evaluation of the proposed metasurface-based wireless communication system are presented with the prototype, which realizes single carrier quadrature phase shift keying(QPSK) transmission over the air. In the developed prototype, the phase of the reflected electromagnetic wave of programma-ble metasurface is directly manipulated in real time according to the baseband control signal, which achieves 2.048 Mbps data transfer rate with video streaming transmission over the air. In addition, experimental result is provided to compare the performance of the proposed metasurface-based architecture against the conventional one. With the slight increase of the transmit power by 5 dB, the same bit error rate(BER) performance can be achieved as the conventional system in the absence of channel coding. Such a result is encouraging considering that the metasurface-based system has the advantages of low hardware cost and simple structure, thus leading to a promising new architecture for wireless communications.Wankai Tang Xiang Li Jun Yan Dai Shi Jin Yong Zeng Qiang Cheng Tie Jun Cui 2019China Communications2019,16,5:23
13Molecular mechanisms of diabetic coronary dysfunction due to large conductance Ca2+-activated K+ channel impairment显示文摘WANG Ru-xing SHI Hai-feng CHAI Qiang WU Ying SUN Wei JI Yuan YAO Yong LI Ku-lin ZHANG Chang-ying ZHENG Jie GUO Su-xia LI Xiao-rong LU Tong 2012Chinese Medical Journal2012,,14:21
14Autoantibody to MOG suggests two distinct clinical subtypes of NMOSD显示文摘We characterized a unique group of patients with neuromyelitis optica spectrum disorder(NMOSD) who carried autoantibodies of aquaporin-4(AQP4) and myelin-oligodendrocyte glycoprotein(MOG). Among the 125 NMOSD patients, 10(8.0%) were AQP4- and MOG-ab double positive, and 14(11.2%) were MOG-ab single positive. The double-positive patients had a multiphase disease course with a high annual relapse rate(P=0.0431), and severe residual disability(P<0.0001). Of the double-positive patients, 70% had MS-like brain lesions, more severe edematous, multifocal regions on spinal magnetic resonance imaging(MRI), pronounced decreases of retinal nerve fiber layer thickness and atrophy of optic nerves. In contrast, patients with only MOG-ab had a higher ratio of monophasic disease course and mild residual disability. Spinal cord MRI illustrated multifocal cord lesions with mild edema, and brain MRIs showed more lesions around lateral ventricles. NMOSD patients carrying both autoantibodies to AQP4 and MOG existed and exhibited combined features of prototypic NMO and relapsing-remitting form of MS, whereas NMOSD with antibodies to MOG only exhibited an 'intermediate' phenotype between NMOSD and MS. Our study suggests that antibodies against MOG might be pathogenic in NMOSD patients and that determination of anti-MOG antibodies maybe instructive for management of NMOSD patients.Yaping Yan Yujing Li Ying Fu Li Yang Lei Su Kaibin Shi Minshu Li Qiang Liu Aimee Borazanci Yaou Liu Yong He Jeffrey L Bennett Timothy L Vollmer Fu-Dong Shi 2016Science China(Life Sciences)2016,59,12:20
15The Impacts of Maternal Gestational Diabetes Mellitus (GDM) on Fetal Hearts显示文摘Objective To evaluate the fetal cardiac function in gestational diabetes mellitus (GDM) pregnancies under different maternal glycemic controls.Methods Forty four GDM mothers received 78 fetal echocardiographic evaluations at three gestational periods (<28,28-34 and ≥34 weeks) and were divided into poorly-(DM1) and well-(DM2) controlled groups according to their glycemic control at examination.Seventy uncomplicated mothers were selected as controls.Parameters of fetal cardiac anatomy and function were measured and analyzed.Results GDM fetuses' cardiac ventricular walls were thicker than controls',and the differences between DM1 and DM2 were not significant except for end-diastolic left ventricular walls.In both GDM groups,the aortic flow velocities increased earlier than pulmonary artery and DM1 fetuses changed earlier than DM2 ones.GDM fetuses' left atrial shortening fraction was smaller than the controls' in the period of ≥34 weeks and negatively correlated with thicknesses of left ventricular walls and interventricular septum in DM1 fetuses (r=-0.438 and -0.506).The right ventricular diastolic function in DM1 and DM2 fetuses decreased after the period of 28-34 weeks and in the period of ≥34 weeks respectively.Tei index of both left and right ventricles increased in DM1 group after the period of<28 weeks and in DM2 group only in the period of ≥34 weeks,with no significant differences between DM1 and DM2 groups in this period.Conclusion Fetuses of GDM mothers showed cardiac function impairments.Good maternal glycemic control may delay the impairments,but cannot reduce the degree.Some cardiac changes in GDM fetuses were similar to those in pregestational diabetic pregnancies except for several parameters and their changing time.CHU Chen GUI Yong Hao PEN Yun Yun SHI Li Ye 2012Biomedical and Environmental Sciences2012,25,1:20
16CYP2C19*2 and Other Allelic Variants Affecting Platelet Response to Clopidogrel Tested by Thrombelastography in Patients with Acute Coronary Syndrome显示文摘Jian Liu Xiao-Yan Nie Yong Zhang Yun Lu Lu-Wen Shi Wei-Min Wang 2015Chinese Medical Journal2015,,16:19
17A novel micro-straw for cryopreservation of sma number of human spermatozoon显示文摘很少精子的 Cryopreservation 仍然是为男富饶保藏的主要挑战。这研究报导使用一新微稻草(LSL 稻草) 为为 intracytoplasmic 精子注射(ICSI ) 冻结很少精子。从 22 个肥沃的施主的精液样品被收集,并且每件精液样品被冲淡并且在 1:1 的比率与 cryoprotectant 混合了,然后结冰使用象 LSL 稻草(50-100 l ) 那样的三根不同稻草,传统 0.25 ml 和 0.5 根 ml 稻草。为结冰,所有稻草与液体氮被熏蒸,与直接归结为 130-140 的温度 ??? ,Feng Liu Sha-Sha Zou Yong Zhu Can Sun Yu-Fei Liu Shan-Shan Wang Wen-Bo Shi Jing-Jing Zhu Yong-Hua Huang Zheng Li 2017Asian Journal of Andrology2017,19,3:19
18Assessment of Heavy Metal Pollution in Estuarine Surface Sediments of Tangxi River in Chaohu Lake Basin显示文摘A total of 30 surface sediments samples from the estuary wetland of the Tangxi River, Chaohu Lake Basin were obtained and tested.Enrichment factor(EF) and geoaccumulation index(I geo ) as well as multivariate statistical analysis methods including Factor Analysis(FA) and Hierarchical Cluster Analysis(HCA) were applied for the assessment of heavy metal pollution in surface sediments.The results of EF values show that the pollution of copper(Cu) and cadmium(Cd) occurs in the estuarine sediments, and that zinc(Zn), lead(Pb) and chrome(Cr) may originate from crustal materials or natural weathering process.The mean EF values of the five heavy metals are in the decreasing order:Cu>Cd>Zn>Pb>Cr.Based on the I geo of target heavy metals, the surface sediments collected from the study area can be approximately categorized as unpolluted with Zn, Pb and Cr, and moderately polluted with Cu and Cd.The degree of heavy metal pollution decreases in the order of Cu>Cd>Zn>Pb>Cr.Three groups of pollution factors are presented from FA:Zn-TOC, Cu-Cd and Cr-Pb, which respectively accounte for 27.22%, 25.20% and 21.05% of variance.By means of HCA, a total number of seven groups are distinguished from 30 sampling sites.Results indicate that Cu and Cd are the prior controlled pollutants in the estuarine sediments of the Tangxi River.LI Ruzhong SHU Kun LUO Yueying SHI Yong 2010Chinese Geographical Science2010,20,1:18
19Improvement of orbit determination for geostationary satellites with VLBI tracking显示文摘China’s COMPASS satellite navigation system consists of five or more geostationary (GEO) satellites.The roles of GEO satellites are to improve the regional user’s positioning accuracy and provide the continuous Radio Determination Satellite Service.The motion of GEO satellites relative to a ground tracking station is almost fixed,and regular orbit maneuvers are necessary to maintain the satellites’ allocated positions above the equator.These features present difficulties in precise orbit determination (POD).C-band ranging via onboard transponders and the L-band pseudo-ranging technique have been used in the COMPASS system.This paper introduces VLBI tracking,which has been successfully employed in the Chinese lunar exploration programs Chang’E-1 and Chang’E-2,to the POD of GEO satellites.In contrast to ranging,which measures distances between a GEO satellite and an observer,VLBI is an angular measurement technique that constrains the satellite’s position errors perpendicular to the satellite-to-observer direction.As a demonstration,the Chinese VLBI Network organized a tracking and orbit-determination experiment for a GEO navigation satellite lasting 24 h.This paper uses the VLBI delay and delay-rate data,in combination with C-band ranging data,to determine the GEO satellite’s orbit.The accuracies of the VLBI delay and delay rate data are about 3.6 ns and 0.4 ps/s,respectively.Data analysis shows that the VLBI data are able to calibrate systematic errors of the C-band ranging data,and the combination of the two observations improves orbit prediction accuracy with short-arc data,which is important for orbital recovery after maneuvers of GEO satellites.With the implementation of VLBI2010,it is possible for VLBI to be applied in the COMPASS satellite navigation system.HUANG Yong HU XiaoGong ZHANG XiuZhong JIANG DongRong GUO Rui WANG Hong SHI ShanBin 2011Chinese Science Bulletin2011,56,26:18
20Platelet Distribution Width on Admission Predicts In-Stent Restenosis in Patients with Coronary Artery Disease and Type 2 Diabetes Mellitus Treated with Percutaneous Coronary Intervention显示文摘Cheng-Ping Hu Yu Du Yong Zhu Chao Shi Zheng Qin Ying-Xin Zhao 2018Chinese Medical Journal2018,,7:18
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