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| 1 | Transmission Dynamics of an Outbreak of the COVID-19 Delta Variant B.1.617.2——Guangdong Province,China,May-June 2021显示文摘On May 21,2021,a local case of coronavirus disease 2019(COVID-19)was confirmed in a 75-year-old woman(experienced onset of symptoms on May 18)in Liwan District,Guangzhou City,Guangdong Province,China.The number of infections has increased in the following 10 days and led to 5 generations of transmission. | Meng Zhang Jianpeng Xiao Aiping Deng Yingtao Zhang Yali Zhuang Ting Hu Jiansen Li Hongwei Tu Bosheng Li Yan Zhou Jun Yuan Lei Luo Zimian Liang Youzhi Huang Guoqiang Ye Mingwei Cai Gongli Li Bo Yang Bin Xu Ximing Huang Yazun Cui Dongsheng Ren Yanping Zhang Min Kang Yan Li | 2021 | China CDC weekly2021，3，27： | 51 |
| 2 | Ligustrazine monomer against cerebral ischemia/reperfusion injury显示文摘Ligustrazine(2,3,5,6-tetramethylpyrazine) is a major active ingredient of the Szechwan lovage rhizome and is extensively used in treatment of ischemic cerebrovascular disease.The mechanism of action of ligustrazine use against ischemic cerebrovascular diseases remains unclear at present.This study summarizes its protective effect,the optimum time window of administration,and the most effective mode of administration for clinical treatment of cerebral ischemia/reperfusion injury.We examine the effects of ligustrazine on suppressing excitatory amino acid release,promoting migration,differentiation and proliferation of endogenous neural stem cells.We also looked at its effects on angiogenesis and how it inhibits thrombosis,the inflammatory response,and apoptosis after cerebral ischemia.We consider that ligustrazine gives noticeable protection from cerebral ischemia/reperfusion injury.The time window of ligustrazine administration is limited.The protective effect and time window of a series of derivative monomers of ligustrazine such as 2-[(1,1-dimethylethyl)oxidoimino]methyl]-3,5,6-trimethylpyrazine,CXC137 and CXC195 after cerebral ischemia were better than ligustrazine. | Hai-jun Gao Peng-fei Liu Pei-wen Li Zhuo-yan Huang Feng-bo Yu Ting Lei Yong Chen Ye Cheng Qing-chun Mu Hai-yan Huang | 2015 | Neural Regeneration Research2015，10，5： | 48 |
| 3 | Prevalence of Thyroid Nodules and Its Relationship with Iodine Status in Shanghai:a Population-based Study显示文摘Objective This study was designed to evaluate the prevalence of thyroid nodules(TNs) and its relationship with urine iodine concentrations(UICs) after the regional rapid economic growth and lifestyle changes. Methods A cross-sectional survey was conducted in the general population aged 15-69 years. A questionnaire regarding general and personal characteristics and relevant information was administered. Ultrasonography of the thyroid was performed, and serum triiodothyronine(T3), tetraiodothyronine(T4), serum thyroid stimulating hormone(TSH), free triiodothyronine(FT3), free tetraiodothyronine(FT4), thyroglobulin antibody(Tg Ab), thyroid peroxidase antibody(TPOAb), and TSH receptor antibody(TRAb) levels were measured for each individual subject. Results The prevalence rates of TNs in the whole population, females and males were 27.76%, 34.04%, and 21.60%, respectively. The prevalence of multiple nodules increased with age, whereas the prevalence peaks differed between males and females. The median UICs in the whole population and females with non-TNs were higher than those of subjects with TNs(P=0.0035, P=0.0068). The median UICs in subjects with a single TN were higher than those in subjects with multiple TNs(P=0.0164, P=0.0127). The result showed a U-shaped curve relationship between UIC and prevalence of TNs. The prevalence of TNs was the lowest when the UIC was 140-400 μg/L. Conclusion The prevalence of TNs was nearly 30% and increased with age. The relationship between UIC and prevalence of TNs is U-shaped, with an increase in risk when the UIC was <140 μg/L and >400 μg/L. Very low or high UIC levels need attention and correction. | SONG Jun ZOU Shu Rong GUO Chang Yi ZANG Jia Jie ZHU Zhen Ni MI Ming HUANG Cui Hua YU Hui Ting LU Xi RUAN Ye WU Fan | 2016 | Biomedical and Environmental Sciences2016，29，6： | 25 |
| 4 | A reappraisal of CTLA-4 checkpoint blockade in cancer immunotherapy显示文摘anti-CTLA-4 抗体由阻止 B7-CTLA-4 相互作用接近否定发信号引起肿瘤拒绝,这被假定。在比临床上有效的 dosing 完成的血浆层次更加高的集中,令人惊讶地, anti-CTLA-4 抗体 Ipilimumab 不由 CTLA-4 也不 CTLA-4 绑定堵住任何一 B7 trans-endocytosis 到使不能调动或联系房间的 B7。因而, Ipilimumab 不从人性化的任何一个 CTLA4 基因在树枝状的房间(DC ) 上增加 B7 (Ctla4 h/h ) 或人的 CD34 + 茎重新组成房间的 NSG 老鼠。在 Ctla4 高效地表示人和老鼠 CTLA4 基因,绑在人的 anti-CTLA-4 抗体然而并非老鼠 CTLA-4 的 h/m 老鼠导致 Treg 弄空和 Fc 受体依赖者肿瘤拒绝。堵住的抗体 L3D10 比得上在引起肿瘤拒绝的非阻塞的 Ipilimumab。显著地,输在人类化期间堵住活动的 L3D10 子孙在导致 Treg 弄空和肿瘤拒绝仍然保持充分能干。有效地在淋巴的器官堵住 CD4 T 细胞激活和 de novo CD8 T 细胞 priming 的 Anti-B7 抗体否定地不影响 Ipilimumab 的 immunotherapeutic 效果。因此,临床上有效的 anti-CTLA-4 mAb 由独立于检查点封锁的机制引起肿瘤拒绝但是依赖于主人 Fc 受体。我们为 CTLA-4 检查点的一个重评价的数据电话封锁假设并且为安全、有效的 anti-CTLA-4 mAbs 的下一代提供新卓见。 | Xuexiang Du Fei Tang Mingyue Liu Juanjuan Su Yan Zhang Wei Wu Martin Devenport Christopher A Lazarski Peng Zhang Xu Wang Peiying Ye Changyu Wang Eugene Hwang Tinghui Zhu Ting Xu Pan Zheng Yang Liu | 2018 | Cell Research2018，28，4： | 25 |
| 5 | Isolation and Identification of a Di-(2-Ethylhexyl)Phthalate-Degrading Bacterium and Its Role in the Bioremediation of a Contaminated Soil显示文摘Di-(2-ethylhexyl) phthalate(DEHP) is a high-molecular-weight phthalate ester(PAE) that has been widely used in the manufacture of polyvinylchloride and contributes to environmental pollution.The objectives of the present study were to isolate a DEHP degrader that can utilize DEHP as a carbon source and to investigate its capacity to biodegrade DEHP in both liquid culture and soil.A bacterial strain WJ4 was isolated from an intensively managed vegetable soil,which was contaminated with PAEs.The strain WJ4 was affiliated to the genus Rhodococcus and was able to remove DEHP from soil effectively.A period of only 7 d was required to degrade about 96.4%of DEHP(200 mg L^(-1)) in the liquid culture,and more than 55%of DEHP(1.0 g kg^(-1)) in the artificially contaminated soil was removed within 21 d.Furthermore,Rhodococcus sp.strain WJ4 had a strong ability to degrade DEHP without additional nutrients in liquid minimal medium culture and DEHP-contaminated soil and to degrade the homologue of DEHP in both liquid culture and soil.Strain WJ4 represents a novel tool for removing PAEs from contaminated soils and it may have great potential for application in the remediation of environmental pollution by PAEs. | WANG Jun ZHANG Man-Yun CHEN Ting ZHU Ye TENG Ying LUO Yong-Ming Peter CHRISTIE | 2015 | Pedosphere2015，25，2： | 18 |
| 6 | Anti-diabetic Effects of Polysaccharides from Ethanol-insoluble Residue of Schisandra chinensis(Turcz.) Baill on Alloxan-induced Diabetic Mice显示文摘 | ZHAO Ting MAO Guang-hua ZHANG Mini LI Fang ZOU Ye ZHOU Ye ZHENG Wei ZHENG Da-heng YANG Liu-qing WUXiang-yang | 2013 | Chemical Research in Chinese Universities2013，29，1： | 14 |
| 7 | Comparison of two bedside evaluation methods of dysphagia in patients with acute stroke显示文摘Background Dysphagia is a common complication after stroke.Water swallowing test(WST)is a recognised but limited tool in providing details about dysphagia,including severity and how to adjust the diet based on the test results.Methods We performed a prospective observational study of comparing WST and volume-viscosity swallow test(V-VST)in patients with acute stroke within 14 days.All patients had WST and if failed would have a V-VST.The primary outcome was to compare the dysphagia levels assessed by these two test tools.The secondary outcome was to explore the predictive capability in patients who were at high risk of pneumonia by these two swallowing tests.results Consecutively 276 patients with stroke were enrolled in our study,and 197 had normal WST.Among 79 patients who had both WST and V-VST,20 showed swallowing safety and effectiveness by V-VST.The chance of being on tube feeding was strongly related to the positive results of failed WST(p<0.001).Both tests showed good predictive ability in patients with stroke for pneumonia even some of them were placed on tube feeding(p=0.001 in WST and p<0.001 in V-VST).Conclusions V-VST performed better as a clinical screening test for dysphagia in patients with acute stroke at the bedside.Trial registration number ChiCTR1800016442. | Ting Ye Shengyan Huang Yi Dong Qiang Dong | 2018 | Stroke & Vascular Neurology2018，3，4： | 13 |
| 8 | Temperature Variable Optimization for Precision Machine Tool Thermal Error Compensation on Optimal Threshold显示文摘Machine tool thermal error is an important reason for poor machining accuracy.Thermal error compensation is a primary technology in accuracy control.To build thermal error model,temperature variables are needed to be divided into several groups on an appropriate threshold.Currently,group threshold value is mainly determined by researchers experience.Few studies focus on group threshold in temperature variable grouping.Since the threshold is important in error compensation,this paper arms to find out an optimal threshold to realize temperature variable optimization in thermal error modeling.Firstly,correlation coefficient is used to express membership grade of temperature variables,and the theory of fuzzy transitive closure is applied to obtain relational matrix of temperature variables.Concepts as compact degree and separable degree are introduced.Then evaluation model of temperature variable clustering is built.The optimal threshold and the best temperature variable clustering can be obtained by setting the maximum value of evaluation model as the objective.Finally,correlation coefficients between temperature variables and thermal error are calculated in order to find out optimum temperature variables for thermal error modeling.An experiment is conducted on a precise horizontal machining center.In experiment,three displacement sensors are used to measure spindle thermal error and twenty-nine temperature sensors are utilized to detect the machining center temperature.Experimental result shows that the new method of temperature variable optimization on optimal threshold successfully worked out a best threshold value interval and chose seven temperature variables from twenty-nine temperature measuring points.The model residual of z direction is within 3 m.Obviously,the proposed new variable optimization method has simple computing process and good modeling accuracy,which is quite fit for thermal error compensation. | ZHANG Ting YE Wenhua LIANG Ruijun LOU Peihuang YANG Xiaolan | 2013 | Chinese Journal of Mechanical Engineering2013，26，1： | 11 |
| 9 | Texture analysis on gadoxetic acid enhanced-MRI for predicting Ki-67 status in hepatocellular carcinoma: A prospective study显示文摘Objective: To investigate the value of whole-lesion texture analysis on preoperative gadoxetic acid enhanced magnetic resonance imaging(MRI) for predicting tumor Ki-67 status after curative resection in patients with hepatocellular carcinoma(HCC).Methods: This study consisted of 89 consecutive patients with surgically confirmed HCC. Texture features were extracted from multiparametric MRI based on whole-lesion regions of interest. The Ki-67 status was immunohistochemical determined and classified into low Ki-67(labeling index ≤15%) and high Ki-67(labeling index >15%) groups. Least absolute shrinkage and selection operator(LASSO) and multivariate logistic regression were applied for generating the texture signature, clinical nomogram and combined nomogram. The discrimination power, calibration and clinical usefulness of the three models were evaluated accordingly. Recurrence-free survival(RFS) rates after curative hepatectomy were also compared between groups.Results: A total of 13 texture features were selected to construct a texture signature for predicting Ki-67 status in HCC patients(C-index: 0.878, 95% confidence interval: 0.791-0.937). After incorporating texture signature to the clinical nomogram which included significant clinical variates(AFP, BCLC-stage, capsule integrity, tumor margin,enhancing capsule), the combined nomogram showed higher discrimination ability(C-index: 0.936 vs. 0.795,P<0.001), good calibration(P>0.05 in Hosmer-Lemeshow test) and higher clinical usefulness by decision curve analysis. RFS rate was significantly lower in the high Ki-67 group compared with the low Ki-67 group after curative surgery(63.27% vs. 85.00%, P<0.05).Conclusions: Texture analysis on gadoxetic acid enhanced MRI can serve as a noninvasive approach to preoperatively predict Ki-67 status of HCC after curative resection. The combination of texture signature and clinical factors demonstrated the potential to further improve the prediction performance. | Zheng Ye Hanyu Jiang Jie Chen Xijiao Liu Yi Wei Chunchao Xia Ting Duan Likun Cao Zhen Zhang Bin Song | 2019 | Chinese Journal of Cancer Research2019，31，5： | 11 |
| 10 | BRAF^(V600E) vs. TIRADS in predicting papillary thyroid cancers in Bethesda system Ⅰ, Ⅲ, and Ⅴ nodules显示文摘Objective: Bethesda System for Reporting Thyroid Cytopathology(BSRTC) categories Ⅰ, Ⅲ, and Ⅴaccount for a significant proportion of fine needle aspiration cytology(FNAC) diagnoses. This study aimed to compare the diagnostic efficacy of BRAF^(V600E) mutation and the Thyroid Imaging Reporting and Data System(TIRADS) classification in differentiating papillary thyroid cancers(PTCs) from benign lesions among BSRTC I, III, and V nodules.Methods: A total of 472 patients with 479 nodules were enrolled in this prospective study. Ultrasound, BRAF^(V600E) mutation testing, and FNAC were performed in each nodule, followed by surgery or regular ultrasound examination.Results: In the BSRTC I category, BRAF^(V600E) showed similar sensitivity, higher specificity, and lower accuracy when compared with TIRADS. In the BSRTC III/V category, the sensitivity, specificity, and accuracy of BRAF^(V600E) were similar to those of TIRADS. In comparison to BRAF^(V600E) alone, the combination of the two methods significantly improved sensitivity(BSRTC Ⅰ:93.6% vs. 67.7%, P < 0.01; BSRTC Ⅲ: 93.8% vs. 75.0%, P < 0.01; BSRTC V: 96.0% vs. 85.3%, P < 0.001). When compared with TIRADS alone, the combination improved sensitivity in BSRTC Ⅰ nodules(93.6% vs. 74.2%, P < 0.05), increased sensitivity and decreased accuracy in BSRTC III nodules(93.8% vs. 75.0%, P < 0.01, 91.0% vs. 93.6%, P < 0.01), and improved both sensitivity and accuracy in BSRTC V nodules(96.0% vs. 82.0%, P < 0.001; 94.2% vs. 81.3%, P < 0.001).Conclusions: BRAF^(V600E) exhibited higher specificity and lower accuracy compared with TIRADS in BSRTC Ⅰ nodules, while the two methods showed similar diagnostic value in BSRTC Ⅲ/Ⅴ nodules. The combination of the two methods distinctly improved sensitivity in the diagnosis of PTCs in BSRTC Ⅰ, Ⅲ, and Ⅴ nodules. | Ya Wu Ting Xu Xingyue Cao Xin Zhao Hongyan Deng Jianxiang Wang Xiao Li Qing Yao Xinhua Ye Meiping Shen Xiaohong Wu | 2019 | Cancer Biology & Medicine2019，16，1： | 9 |
| 11 | Clinicopathological classification and individualized treatment of breast cancer显示文摘 | Hu Hui Liu Yin-hua Xu Ling Zhao Jian-xin Duan Xue-ning Ye Jing-ming Li Ting Zhang Hong Zhang Shuang Xiong Yan | 2013 | Chinese Medical Journal2013，，20： | 8 |
| 12 | Def defines a conserved nucleolar pathway that leads p53 to proteasome-independent degradation显示文摘通过 ubiquitination 小径的 p53 蛋白质周转是在它的 transcriptional 活动的规定的重要机制;然而,很少通过 proteasome 独立的小径对 p53 周转被知道。消化机关扩大因素(Def ) 蛋白质为消化机关的发展是必要的。在 zebrafish, def 的功能的损失有选择地 upregulates p53 反应基因的表示,它提出至于是在 Def 和 p53 之间的关系的一个问题。我们这里报导 Def 是核仁的蛋白质并且 def 的功能的损失导致 p53 蛋白质的 upregulation,它令人惊讶地在 nucleoli 积累。我们的广泛的研究证明了 Def 能调停这个过程是的 p53 蛋白质和那的降级在 Calpain3 的活动独立于 proteasome 小径,却依赖,半胱氨酸朊酶。我们的调查结果定义调整 p53 的周转功能的一条新奇核仁的小径,它将在 organogenesis 和 tumorigenesis 推进我们 p53 的角色的理解。 | Ting Tao Hui Shi Yihong Guan Delai Huang Ye Chen David P Lane Jun Chen Jinrong Peng | 2013 | Cell Research2013，23，5： | 8 |
| 13 | A retrospective prognostic evaluation analysis using the 8th edition of American Joint Committee on Cancer(AJCC)cancer staging system for luminal A breast cancer显示文摘Objective: We retrospectively analyzed the clinical prognostic value of the 8th edition of the American Joint Committee on Cancer(AJCC) staging system for luminal A breast cancer.Methods: Using both the anatomic and prognostic staging in the 8th edition of AJCC cancer staging system, we restaged patients with luminal A breast cancer treated at the Breast Disease Center, Peking University First Hospital from 2008 to 2014. Follow-up data including 5-year disease free survival(DFS), overall survival(OS) and other clinic-pathological data were collected to analyze the differences between the two staging subgroups.Results: This study included 421 patients with luminal A breast cancer(median follow-up, 61 months). The 5-year DFS and OS rates were 98.3% and 99.3%, respectively. Significant differences in 5-year DFS but not OS were observed between different anatomic disease stages. Significant differences were observed in both 5-year DFS and OS between different prognostic stages. Application of the prognostic staging system resulted in assignment of 175 of 421 patients(41.6%) to a different group compared to their original anatomic stages. In total, 102 of 103 patients with anatomic stage IIA changed to prognostic stage IB, and 24 of 52 patients with anatomic stage IIB changed to prognostic stage IB, while 1 changed to prognostic stage IIIB. Twenty-two of 33 patients with anatomic stage IIIA were down-staged to IIA when staged by prognostic staging system, and the other 11 patients were down-staged to IIB. Two patients with anatomic stage IIIB were down-staged to IIIA. Among seven patients with anatomic stage IIIC cancer, two were down-staged to IIIA and four were down-staged to stage IIIB.Conclusions: The 8th edition of AJCC prognostic staging system is an important supplement to the breast cancer staging system. More clinical trials are needed to prove its ability to guide selection of proper systemic therapy and predict prognosis of breast cancer. | jingming ye wenjun wang ling xu xuening duan yuanjia cheng ling xin hong zhang shuang zhang ting li yinhua liu | 2017 | Chinese Journal of Cancer Research2017，29，4： | 8 |
| 14 | Preparation and shaping of solid acid SO_4^(2-)/TiO_2 and its application for esterification of propylene glycol monomethyl ether and acetic acid显示文摘The solid acid SO_4^(2-)/TiO_2 was prepared by immersion method and applied for synthesis of propylene glycol methyl ether acetate(PMA) through esterification reaction of propylene glycol monomethyl ether(PM)and acetic acid(HAc). The optimal catalyst preparation condition was determined by orthogonal analysis of parameters in a five-factor and four-level test. The obtained solid acid catalysts were characterized in detail by means of X-ray powder diffraction, thermogravimetry, pyridine adsorbed IR analysis, scanning electron microscopy, and BET surface area method. Synthesis of PMA was studied in this paper through experimental investigation of reaction conditions such as temperature, molar ratio of reactants, catalyst dosage and agitation speed. Based on its possible reaction mechanism, a pseudo-homogeneous kinetic model was established and its activation energies E_a^+ and E_a^-,65.68 × 10~3J·mol^(-1) and 57.78 × 10~3J·mol^(-1), were estimated. To prepare shaped solid acid catalyst SO_4^(2-)/TiO_2, the shaping method of impregnation–shaping–impregnation was applied. The optimal molding formulation of solid acid catalyst, obtained from the orthogonal test, was found to be binder 7 wt%, reinforcing agent 20 wt%, pore forming material 2.5 wt%, and lubricant 4 wt%.The results of performance test of catalyst demonstrated that the shaped solid acid catalyst exhibited high activity and stability. | Zhixian Huang Yixiong Lin Ling Li Changshen Ye Ting Qiu | 2017 | Chinese Journal of Chemical Engineering2017，25，9： | 8 |
| 15 | Association of Overlapped and Un-overlapped Comorbidities with COVID-19 Severity and Treatment Outcomes: A Retrospective Cohort Study from Nine Provinces in China显示文摘Objective Several COVID-19 patients have overlapping comorbidities. The independent role of each component contributing to the risk of COVID-19 is unknown, and how some non-cardiometabolic comorbidities affect the risk of COVID-19 remains unclear.Methods A retrospective follow-up design was adopted. A total of 1,160 laboratory-confirmed patients were enrolled from nine provinces in China. Data on comorbidities were obtained from the patients’ medical records. Multivariable logistic regression models were used to estimate the odds ratio(OR) and 95% confidence interval(95% CI) of the associations between comorbidities(cardiometabolic or non-cardiometabolic diseases), clinical severity, and treatment outcomes of COVID-19.Results Overall, 158(13.6%) patients were diagnosed with severe illness and 32(2.7%) had unfavorable outcomes. Hypertension(2.87, 1.30–6.32), type 2 diabetes(T2 DM)(3.57, 2.32–5.49),cardiovascular disease(CVD)(3.78, 1.81–7.89), fatty liver disease(7.53, 1.96–28.96), hyperlipidemia(2.15, 1.26–3.67), other lung diseases(6.00, 3.01–11.96), and electrolyte imbalance(10.40, 3.00–26.10)were independently linked to increased odds of being severely ill. T2 DM(6.07, 2.89–12.75), CVD(8.47,6.03–11.89), and electrolyte imbalance(19.44, 11.47–32.96) were also strong predictors of unfavorable outcomes. Women with comorbidities were more likely to have severe disease on admission(5.46,3.25–9.19), while men with comorbidities were more likely to have unfavorable treatment outcomes(6.58, 1.46–29.64) within two weeks.Conclusion Besides hypertension, diabetes, and CVD, fatty liver disease, hyperlipidemia, other lung diseases, and electrolyte imbalance were independent risk factors for COVID-19 severity and poor treatment outcome. Women with comorbidities were more likely to have severe disease, while men with comorbidities were more likely to have unfavorable treatment outcomes. | MA Yan ZHU Dong Shan CHEN Ren Bo SHI Nan Nan LIU Si Hong FAN Yi Pin WU Gui Hui YANG Pu Ye BAI Jiang Feng CHEN Hong CHEN Li Ying FENG Qiao GUO Tuan Mao HOU Yong HU Gui Fen HU Xiao Mei HU Yun Hong HUANG Jin HUANG Qiu Hua HUANG Shao Zhen JI Liang JIN Hai Hao LEI Xiao LI Chun Yan LI Min Qing LI Qun Tang LI Xian Yong LIU Hong De LIU Jin Ping LIU Zhang MA Yu Ting MAO Ya MO Liu Fen NA Hui WANG Jing Wei SONG Fang Li SUN Sheng WANG Dong Ting WANG Ming Xuan WANG Xiao Yan WANG Yin Zhen WANG Yu Dong WU Wei WU Lan Ping XIAO Yan Hua XIE Hai Jun XU Hong Ming XU Shou Fang XUE Rui Xia YANG Chun YANG Kai Jun YUAN Sheng Li ZHANG Gong Qi ZHANG Jin Bo ZHANG Lin Song ZHAO Shu Sen ZHAO Wan Ying ZHENG Kai ZHOU Ying Chun ZHU Jun Teng ZHU Tian Qing ZHANG Hua Min WANG Yan Ping WANG Yong Yan 无 | 2020 | Biomedical and Environmental Sciences2020，33，12： | 8 |
| 16 | Polycyclic aromatic hydrocarbon concentrations, compositions, sources, and associated carcinogenic risks to humans in farmland soils and riverine sediments from Guiyu, China显示文摘The concentrations of 16 priority polycyclic aromatic hydrocarbons(PAHs) were measured in 23 farmland soil samples and 10 riverine sediment samples from Guiyu, China, and the carcinogenic risks associated with PAHs in the samples were evaluated. Guiyu is the largest electronic waste(EW) dismantling area globally, and has been well known for the primitive and crude manner in which EWs are disposed, such as by open burning and roasting. The total PAH concentrations were 56–567 ng/g in the soils and 181–3034 ng/g in the sediments.The Shanglian and Huamei districts were found to be more contaminated with PAHs than the north of Guiyu. The soils were relatively weakly contaminated but the sediments were more contaminated, and sediments in some river sections might cause carcinogenic risks to the groundwater system. The PAHs in the soils were derived from combustion sources,but the PAHs in the sediments were derived from both combustion and petroleum sources. | Pengjun Xu Bu Tao Zhiqiang Ye Hu Zhao Yue Ren Ting Zhang Yeru Huang Jiping Chen | 2016 | Journal of Environmental Sciences2016，28，10： | 8 |
| 17 | Spectral Features of Soil Organic Matter显示文摘土壤上的学习光谱反射特征是土壤遥感的物理基础。土壤有机物内容影响土壤光谱反射戏剧性地。这篇论文学习了光谱在是的 174 土样的 400 nm∼2500 nm 之间的曲线在 Hengshan 收集了县和 Yixing 县。转变的十四种类型被用于土壤反射 R 移开噪音并且线性化在反射(独立变量) 和土壤有机物(SOM ) 内容(依赖变量) 之间的关联。然后,方法象衍生物光谱技术那样和逐步的回归分析,被使用学习在这些土壤之间的关系光谱特征和土壤有机物内容。它证明命令反射(O1DLA ) 的对数的 1 衍生物对在在考虑的反射的各种各样的变换类型之中的 SOM 最敏感。其决心的系数到达 0.885 的回归模型被造。它与更高的效果预言了土壤有机物内容。 | HE Ting WANG Jing LIN Zongjian CHENG Ye | 2009 | Geo-Spatial Information Science2009，12，1： | 7 |
| 18 | Two new steroidal saponins from the rhizomes of Dioscorea zingiberensis显示文摘AIM: To investigate the chemical constituents of Dioscorea zingiberensis C. H. Wright. METHODS: The compounds were isolated by various chromatographic techniques, and the structures of the new steroidal saponins were elucidated by extensive 1D- and 2D-NMR, MS, and IR spectral analysis. RESULTS: The 70% EtOH extract of the rhizomes of Dioscorea zingiberensis afforded two new steroidal saponins, zingiberenosides A(1) and B(2), along with eight known analogues, 3β, 26-dihydroxy-25(R)-furosta-△5, 20(22)-diene-3-O-α-Lrhamnopyranosyl-(1→2)-O-β-D-glucopyranoside(3), methyl parvifloside(4), deltoside(5), methyl deltoside(6), zingiberensis new saponin(7), deltonin(8), progenin III(9) and diosgenin-diglucoside(10). CONCLUSION: Two new steroidal saponins were isolated from Dioscorea zingiberensis and their structures determined. | ZHENG Lu ZHOU Yuan ZHANG Jia-Yu SONG Min YUAN Ye XIAO Yan-Jiao XIANG Ting | 2014 | Chinese Journal of Natural Medicines2014，12，2： | 7 |
| 19 | Noble Gas Isotopic Compositions of Cobalt-rich Ferromanganese Crusts from the Western Pacific Ocean and Their Geological Implications显示文摘Noble gas isotopic compositions of various layers in three-layered (outer, porous and compact layers) cobalt-rich ferromanganese crusts and their basaltic and phosphorite substrates from the western Pacific Ocean were analyzed by using a high vacuum gas mass spectrum. The analytical results show that the noble gases in the Co-rich crusts have derived mainly from the ambient seawater, extraterrestrial grains such as interplanetary dust particles (IDPs) and wind-borne continental dust grains, and locally formation water in the submarine sediments, but different noble gases have different sources. He in the crusts derives predominantly from the extraterrestrial grains, with a negligible amount of radiogenic He from the eolian dust grains. Ar is sourced mainly from the dissolved air in the seawater and insignificantly from radiogenic Ar in the eolian continental dust grains or the formation water. Xe and Ne derive mainly from the seawater, with minor amounts of extraterrestrial Xe and Ne in the IDPs. Compared with the porous and outer layers, the compact layer has a relatively high 4He content and lower 3He/4He ratios, suggesting that marine phosphatization might have greatly modified the noble gas isotopic compositions of the crusts. Besides, the 3He/4He values of the basaltic substrates of the cobalt-rich crusts are very low and their R/Ra ratios are mostly <0.1 Ra, which are similar to that of phosphorite substrates (0.087 Ra), but much lower than that of fresh submarine MORB (8.75±2.14 Ra) or seamount basalts (3-43 Ra), implying that the basaltic substrates have suffered strong water/rock interaction and reacted with radiogenic 4He and P-rich upwelling marine currents during phosphatization. The trace elements released in the basalt/seawater interaction might favor the growth of cobalt-rich crusts. The relatively low 3He/4He values in the seamount basalts may be used as an important exploration criterion for the cobalt-rich ferromanganese crusts. | SUN Xiaoming XUE Ting HE Gaowen YE Xianren ZHANG Mei LU Hongfeng WANG Shengwei | 2007 | Acta Geologica Sinica(English Edition)2007，81，1： | 5 |
| 20 | Phytosterol content and the campesterol:sitosterol ratio influence cotton fiber development: role of phytosterols in cell elongation显示文摘Phytosterols play an important role in plant growth and development,including cell division,cell elongation,embryogenesis,cellulose biosynthesis,and cell wall formation.Cotton fiber,which undergoes synchronous cell elongation and a large amount of cellulose synthesis,is an ideal model for the study of plant cell elongation and cell wall biogenesis.The role of phytosterols in fiber growth was investigated by treating the fibers with tridemorph,a sterol biosynthetic inhibitor.The inhibition of phytosterol biosynthesis resulted in an apparent suppression of fiber elongation in vitro or in planta.The determination of phytosterol quantity indicated that sitosterol and campesterol were the major phytosterols in cotton fibers;moreover,higher concentrations of these phytosterols were observed during the period of rapid elongation of fibers.Furthermore,the decrease and increase in campesterol:sitosterol ratio was associated with the increase and decease in speed of elongation,respectively,during the elongation stage.The increase in the ratio was associated with the transition from cell elongation to secondary cell wall synthesis.In addition,a number of phytosterol biosynthetic genes were down-regulated in the short fibers of ligon lintless-1mutant,compared to its near-isogenic wild-type TM-1.These results demonstrated that phytosterols play a crucial role in cotton fiber development,and particularly in fiber elongation. | Shasha Deng Ting Wei Kunling Tan Mingyu Hu Fang Li Yunlan Zhai Shue Ye Yuehua Xiao Lei Hou Yan Pei Ming Luo | 2016 | Science China(Life Sciences)2016，59，2： | 5 |
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