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DEEP Neoarchean Subduction Indicated by Ultra-high Pressure TiO_(2)(Ⅱ) Inclusion in Ophiolitic Podiform Chromitite Block in mélange, Central(Taihang) Orogenic Belt, North China

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Acta Geologica Sinica(English Edition) 2021年第S1期95卷 85-87页

作者： tim KUSKY WANG Lu Paul ROBINSON Richard WIRTH HUANG Yang State Key Lab for Geological Processes and mineral Resources Center for Global TectonicsChina University of GeosciencesWuhan 430074China Helmholtz Center Potsdam German Research Centre for Geosciences GFZ D-14473 PotsdamGermany

Understanding crust-mantle recycling through time,especially into the Archean,is crucial for understanding how the crust has grown from the mantle,and in turn how crustal material returned to the mantle alters the mantle *** of crustal material,such as C-H-O-NS-P are especially important for understanding how processes such as subduction,melting,volcanism,and the release of volatiles have regulated climate and life on Earth over billions of years.

关键词： Archean tectonics ophiolitic mélange ultrahigh-pressure minerals suduction carbon cycle

High Spatial Resolution and High Temporal Frequency(30-m/15-day) Fractional Vegetation Cover Estimation over China Using multiple Remote Sensing Datasets:method Development and Validation

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Journal of meteorological Research 2021年第1期35卷 128-147页

作者： Xihan mU Tian ZHAO Gaiyan RUAN Jinling SONG Jindi WANG Guangjian YAN tim RmCVICAR Kai YAN Zhan GAO Yaokai LIU Yuanyuan WANG State Key Laboratory of Remote Sensing Science Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Beijing Engineering Research Center for Global Land Remote Sensing Products Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China CSIRO Land and Water ACT2601Australia Department of Earth and Environment Boston UniversityBostonMA 02215USA Jiangsu Institute of Urban Planning and Design Nanjing 210036China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China National Satellite meteorological Center China Meteorological AdministrationBeijing 100081China

High spatial resolution and high temporal frequency fractional vegetation cover(FVC) products have been increasingly in demand to monitor and research land surface processes. This paper develops an algorithm to estimate FVC at a 30-m/15-day resolution over China by taking advantage of the spatial and temporal information from different types of sensors: the 30-m resolution sensor on the Chinese environment satellite(HJ-1) and the 1-km moderate Resolution Imaging Spectroradiometer(mODIS). The algorithm was implemented for each main vegetation class and each land cover type over China. First, the high spatial resolution and high temporal frequency normalized difference vegetation index(NDVI) was acquired by using the continuous correction(CC) data assimilation method. Then, FVC was generated with a nonlinear pixel unmixing model. model coefficients were obtained by statistical analysis of the mODIS NDVI. The proposed method was evaluated based on in situ FVC measurements and a global FVC product(GEOV1 FVC). Direct validation using in situ measurements at 97 sampling plots per half month in 2010 showed that the annual mean errors(mEs) of forest, cropland, and grassland were-0.025, 0.133, and 0.160, respectively, indicating that the FVCs derived from the proposed algorithm were consistent with ground measurements [R2 = 0.809,root-mean-square deviation(RmSD) = 0.065]. An intercomparison between the proposed FVC and GEOV1 FVC demonstrated that the two products had good spatial–temporal consistency and similar magnitude(RmSD approximates 0.1). Overall, the approach provides a new operational way to estimate high spatial resolution and high temporal frequency FVC from multiple remote sensing datasets.

关键词： fractional vegetation cover(FVC) high spatial resolution and high temporal frequency data fusion normalized difference vegetation index(NDVI) pixel unmixing model multiple remote sensing datasets

Assessment of the Potential of Honeybees (<i>Apis mellifera</i>L.) in Biomonitoring of Air Pollution by Cadmium, Lead and Vanadium

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Journal of Environmental Protection 2015年第2期6卷 96-102页

作者： Jozef J. m. Van der Steen Joop de Kraker tim Grotenhuis Plant Research International Wageningen Netherlands School of Science Open Universiteit Heerlen Netherlands Section Environmental Technology Wageningen University Wageningen Netherlands

The aim of our study was to explore whether honeybees (Apis mellifera L.) could be used as a reliable alternative to the standard mechanical devices for monitoring of air quality, in particular with respect to the concentration of the heavy metals cadmium (Cd), lead (Pb) and vanadium (V). We therefore tested whether the concentrations of these metals in adult honeybees and in ambient air were positively correlated, and whether differences in concentration between locations were similar for bees and air. On the basis of our measurements, conducted over a two-month period at three distinct locations in the Netherlands with each three replicate honeybee colonies placed next to mechanical monitoring devices, we concluded that a significant positive relationship between the concentrations in bees and in air could only be established for V. Also, only in the case of V, the differences between the three locations in mean concentration were similar for bees and air. Both outcomes were probably due to the relatively large range over which the concentrations of V varied, both in bees and in air, as compared to Cd and Pb. However, for V, as well as for Cd and Pb, the concentrations in ambient air were about two orders of magnitude below the established air quality standards. We therefore conclude that in the Netherlands, both variation and levels of the atmospheric concentrations of these metals are too low to establish a relationship between the concentration in bees and in air that is useful to present honeybees as an alternative to mechanical devices in monitoring of air pollution. However, in countries with larger variation and higher levels of the atmospheric concentrations of these metals, further exploration of the potential of honeybees in biomonitoring of air pollution may be worthwhile.

关键词： Cadmium Lead Vanadium Air Pollution Biomonitoring Honeybee

Prospective evaluation of ^(18)F-FDG positron emission tomography in the preoperative staging of patients with hepatic colorectal metastases

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Hepatobiliary Surgery and Nutrition 2022年第4期11卷 539-554页

作者： tim Akhurst mithat Gönen Raymond E.Baser Lawrence H.Schwartz Scott Tuorto Lynn A.Brody Anne Covey Karen T.Brown Steven m.Larson Yuman Fong Department of Radiology Memorial Sloan-Kettering Cancer CenterNew YorkNYUSA Peter macCallum Cancer Centre VictoriaAustralia Department of Epidemiology and Biostatistics Memorial Sloan-Kettering Cancer CenterNew YorkNYUSA Department of Surgery Memorial Sloan-Kettering Cancer CenterNew YorkNYUSA

Background:Despite considerable advances in preoperative imaging,up to one-third of patients operatively explored for hepatic colorectal metastases are unexpectedly found to harbor unresectable intrahepatic or extrahepatic ***:The current study is a prospective,blinded study comparing utility of[18F]2-fluoro-2-deoxyglucose positron emission tomography(18F-FDG-PET)to computed tomography(CT)and CT arterial portography(CTAP)as preoperative ***:The 125 planned subjects were *** seen on FDG-PET alone changed therapy for 23 of 125 patients(18%).FDG-PET confirmed other radiologic findings in 16 cases(13%),for an overall influence on therapy in 39 cases(31%).FDG-PET was the most sensitive diagnostic imaging test for extrahepatic cancer;it was 80-90%sensitive for extrahepatic cancer and 70-90%*** the 28 cases of unresectable disease due to extrahepatic disease,FDG-PET findings solely changed therapies in 16 cases(57%)and influenced therapy in seven other cases(25%).Of the 21 unresectable cases due to extent of intrahepatic disease,FDG-PET did not solely change therapy in ***,FDG-PET had the lowest sensitivity for hepatic sites compared with CT or *** particular,small(m)liver tumors were particularly poorly detected by *** area under the receiver operating characteristic(ROC)curve for small tumors was 0.58 and for patients on chemotherapy it was 0.66,a modest improvement over no ***:FDG-PET is an important test for preoperative staging of patients with hepatic colorectal metastases,affecting treatment decisions in nearly one-third of *** high yield is due mainly to detection of extrahepatic *** is therefore recommended in patients with extrahepatic lesions suspected to be disseminated cancer or those with high risk for extrahepatic *** is not a good test for identification of small tumors in the liver.

关键词： Positron emission tomography(PET) computed tomography(CT) colorectal hepatic metastases surgery

析出型LaFe_(0.9)Ru_(0.1)O_(3)钙钛矿催化剂在丙烷催化氧化反应中的自活化现象

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Chinese Journal of Catalysis 2023年第11期54卷 250-264页

作者：王宇 Jaime Gallego 汪炜 Phillip timmer 丁敏 Alexander Spriewald Luciano tim Weber Lorena Glatthaar 郭杨龙 Bernd m.Smarsly Herbert Over 华东理工大学化学与分子工程学院工业催化研究所绿色化工与工业催化全国重点实验室上海200237 尤斯图斯-李比希大学物理化学研究所吉森德国尤斯图斯-李比希大学材料研究中心吉森德国

负载型贵金属催化剂在能源转化和环境污染控制等领域有广泛应用.相对于采用传统方法制备负载型贵金属催化剂,还原析出策略在控制贵金属的粒径,增强贵金属与载体相互作用方面具有独特的优势.但是在高温还原气氛下,贵金属析出的同时往往... 详细信息

负载型贵金属催化剂在能源转化和环境污染控制等领域有广泛应用.相对于采用传统方法制备负载型贵金属催化剂,还原析出策略在控制贵金属的粒径,增强贵金属与载体相互作用方面具有独特的优势.但是在高温还原气氛下,贵金属析出的同时往往伴随着母体结构中其它元素的析出,这会对催化剂的性能产生较大影响.因此,理解催化剂在还原气氛下以及后续反应条件下的结构演变,对于催化剂的设计及制备具有重要意义.本文通过800℃还原Ru掺杂的LaFe_(0.9)Ru_(0.1)O_(3)(LFRO)钙钛矿前驱体制备了贵金属析出的LFRO催化剂(LFRO800R),并用于丙烷催化氧化反应.活性测试结果表明,析出Ru催化剂的丙烷氧化性能远远低于原始的LFRO.当第一次反应结束,催化剂床层温度降至室温后再次评价其性能,LFRO 800R催化剂会发生“自活化”现象,在210℃下催化丙烷反应速率达到了22.3 molCO_(2)·h^(-1)·kgcat^(-1),是该温度下贵金属未析出LFRO催化剂的5倍,反应10 h后仍表现出较高的稳定性.为进一步研究LFRO800R在丙烷氧化反应中发生“自活化”的原因,在不同温度对LFRO 800R进行氧化处理,发现经过400℃氧化后得到的LFRO800R400O表现出最佳的丙烷催化活性.采用高分辨透射电镜、能量散射谱、漫反射红外傅立叶变换光谱、扫描电镜、X射线衍射、Raman光谱和X射线光电子能谱等方法对催化剂进行了表征,结果表明,经过800℃还原预处理,伴随着Ru从LFRO钙钛矿结构的体相中析出到表面,钙钛矿A位元素La也会析出并在RuFe(Ru占据主导)颗粒表面形成一层LaO_(x)覆盖层,阻碍了反应物分子在活性位点Ru上的吸附与活化,导致LFRO 800R在丙烷完全氧化反应中的低温区间表现出失活的现象.而在400℃的氧化气氛处理下,该LaO_(x)包裹层会从析出颗粒的表面完全去除,伴随着少部分界面处的Ru重新进入钙钛矿结构,大量有活性的Ru物种被暴露出来,因此催化剂表现出较好的丙烷催化氧化性能.活化后的LFRO800R400O催化剂中Ru的平均粒径为12 nm,远远小于负载型Ru/LFO800R400O催化剂的34 nm,说明还原析出策略在控制贵金属粒径方面有优势.综上,本文揭示了还原析出策略制备的Ru基钙钛矿催化剂的失活原因以及后续的氧化气氛中“自活化”的原因,为理性设计与制备高效的析出型贵金属催化剂提供了借鉴.

关键词： LaFe_(0.9)Ru_(0.1)O_(3)钙钛矿溶出氧化还原预处理 RuO_(2) 丙烷完全催化氧化

Slow Growing Pre-Weaning Piglets Have Altered Adipokine Gene Expression

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Open Journal of Animal Sciences 2014年第4期4卷 187-195页

作者： tim G. Ramsay m. J. Stoll T. J. Caperna Animal Biosciences and Biotechnology Laboratory Beltsville Agricultural Research Center USDA/ARS Beltsville USA

Growth rate affects adipose tissue development and variations in growth rate may potentially impact adipokine expression. Samples of subcutaneous (SQ) and perirenal (PR) adipose tissues and longissimus muscle were collected at day 21 of age from the fastest and slowest growing piglets within seven litters. Reverse transcription and real-time PCR were used to quantify adipokine mRNA abundance. Leptin, adiponectin, tumor necrosis factor α (TNFα ) and lipoprotein lipase (LPL) mRNA abundance were lower in SQ from slow growing piglets (SGP) than in fast growing piglets (FGP, P α gene expression were reduced in PR from SGP in comparison to FGP (P β (IL1β), IL15 and LPL were increased in the longissimus of SGP relative to FGP (P mRNA abundance for these adipokines within adipose tissue at day 21 of age demonstrated that the effect of growth rate on adipokine expression varies among different adipokines and the internal and external sites of adipose tissue deposition (PR versus SQ). The increase in longissimus expression of LPL and IL15 suggests that nutrient partitioning for energy use may be greater in the skeletal muscle of the SGP.

关键词： Adipose Tissue Adipokines Neonate Growth Rate

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健忘与痴呆

鼻咽癌细胞CIC-3在细胞周期中的表达(英文)

丛书名：家庭医生丛书

2000年

作者：（英）Christopher martyn （英）Catharine gale 周瑞玲林驹译

本书介绍了我担心自己的记忆力，你的记忆力如何，如何克服记忆障碍，是重病的征兆吗、什么是痴呆、医生会做些什么等。

ISBN: (纸本)7533516974

本书介绍了我担心自己的记忆力，你的记忆力如何，如何克服记忆障碍，是重病的征兆吗、什么是痴呆、医生会做些什么等。

关键词：健忘学科:防治老年精神病学学科:痴呆痴呆

来源：汇雅图书（南通市图书馆... 评论

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生理学报 2004年第2期56卷 230-236页

作者：王立伟陈丽新 tim JACOB 广东医学院生理学教研室细胞生物学研究室广东湛江524023 加的夫大学生物科学学院英国加的夫CF10 3US

用免疫荧光、激光共聚焦显微镜图像分析及膜片钳等技术研究了鼻咽癌上皮cNE-2Z细胞容积激活性氯通道候选基因C1C-3的表达及其在细胞周期中与容积激活性氯电流及细胞容积调节性回缩(regulatorly volume decrease,RVD)的关系。结果显示,CN... 详细信息

用免疫荧光、激光共聚焦显微镜图像分析及膜片钳等技术研究了鼻咽癌上皮cNE-2Z细胞容积激活性氯通道候选基因C1C-3的表达及其在细胞周期中与容积激活性氯电流及细胞容积调节性回缩(regulatorly volume decrease,RVD)的关系。结果显示,CNE-2Z细胞表达CIC-3。C1C-3蛋白主要位于细胞内而不是在细胞膜上,其表达水平及其在细胞中的分布呈细胞周期依赖性。G1期细胞的C1C-3表达水平较低而S期则较高,m期细胞的表达水平中等。在细胞周期中,C1C-3表达水平与细胞RVD能力及容积激活性氯电流水平呈反比。上述观察结果提示,C1C-3可能参与细胞周期的调节,但CNE-2Z细胞中的C1C-3可能不是与RVD有关的氯通道。

关键词：肿瘤细胞 CIC-3蛋白氯通道基因表达细胞周期

New measures of the refractive index in liquids using speckle patterns

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New measures of the refractive index in liquids using speckl...