|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Long Distance Transmission of SARS-CoV-2 from Contaminated Cold Chain Products to Humans——Qingdao City,Shandong Province,China,September 2020显示文摘Summary What is already known about this topic?Though coronavirus disease 2019(COVID-19)has largely been controlled in China,several outbreaks of COVID-19 have occurred from importation of cases or of suspected virus-contaminated products.Though several outbreaks have been traced to severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)isolated on the outer packaging of cold chain products,live virus has not been obtained. | Huilai Ma Zhaoguo Wang Xiang Zhao Jun Han Yong Zhang Hong Wang Cao Chen Ji Wang Fachun Jiang Jie Lei Jingdong Song Shaofeng Jiang Shuangli Zhu Huihui Liu Dongyan Wang Yao Meng Naiying Mao Yanhai Wang Zhen Zhu Zhixiao Chen Bingling Wang Qinqin Song Haijun Du Qun Yuan Dong Xia Zhiqiang Xia Peipei Liu Yuchao Wu Zijian Feng Ruqin Gao George F.Gao Wenbo Xu | 2021 | China CDC weekly2021，3，30： | 13 |
| 2 | Effects of location within the tree canopy on carbohydrates,organic acids,amino acids and phenolic compounds in the fruit peel and flesh from three apple(Malus×domestica)cultivars显示文摘Fruits from three cultivars of apple(Malus × domestica Borkh.)—‘McIntosh’,‘Gala’and‘Mutsu’—were harvested from the exterior and interior of the tree canopy.Peel and flesh tissues were sampled separately to determine how the position of the fruit on the tree might affect the levels of the primary and secondary metabolites in the fruit.Fruit from the outer-canopy had a higher fresh weight and a higher soluble solids content compared with inner-canopy fruit.Both the flesh and peel of the outer-canopy fruit had higher concentrations of soluble sugars and sugar alcohols,but lower starch concentrations than the inner-canopy fruit.Canopy position did not significantly affect malic acid concentrations,except in the peel of‘McIntosh’and the flesh of‘Mutsu’.Although levels of ascorbic and succinic acids were higher in the peel of the outer-canopy fruit,the responses of other organic acids to canopy position depended on tissue type and cultivar.Except for histidine,lysine,threonine and glycine,most amino acids accumulated at higher concentrations in the inner-canopy fruit.By contrast,levels of phenolic compounds from both the peel and flesh were significantly higher in the outer-canopy fruit.The significant effects of location within the canopy on both primary metabolites and secondary metabolites demonstrate the importance of light exposure on apple fruit quality. | Fengjuan Feng Mingjun Li Fengwang Ma Lailiang Cheng | 2014 | Horticulture Research2014，1，1： | 7 |
| 3 | DISTRIBUTION AND ABUNDANCE OF EGGS AND LARVAE OF ANTARCTIC KRILL(ENPHAUSUA SUPERBADANA)IN ANTARCTIC PENINSULA AREA显示文摘During the First Chinese Antarctic Expedition zooplankton samples were collected at each of the oceanography stations in the waters around South Sheltland Islands (S. S. Is.) and in the northern part of the Bellinshausen Sea from 20 January to 12 February, 1985 by vertical tows of an 80 cm diameter conical net from 200 m to surface. Two deep tows with a closing net. were performed in slope water north of S.S. Is, and in the basin of Bransfield Strait. Eggs and larvae of Euphatisia superba Dana in zooplankton samples were identified and counted.There were four records of eggs from 27 stations. Most catches were of small number and restricted to within the nearshore area south of S.S Is.The largest number (1500/1000 cubic meters )was found in the outer side of Smith Island.No Nauplius was found . The earliest stage we found <was Metanauplius , in two deep tows. The distribution of Calyptopis MI and Furcili I-III were quite similar. They were found mainly in three areas: 1 ) nearshore water along the | 王荣 | 1989 | Chinese Journal of Oceanology and Limnology1989，7，2： | 7 |
| 4 | COMPRESSIBILITY BOUNDARY LAYER THEORY AND ITS SIGNIFICANCE IN COMPUTATIONAL HYDRODYNAMICS显示文摘COMPRESSIBILITYBOUNDARYLAYERTHEORYANDITSSIGNIFICANCEINCOMPUTATIONALHYDRODYNAMICS￥CharlesC.S.Song(UniversityofMinnesota,Minnea... | Charles C.S. Song(University of Minnesota, Minneapolis Minnesota 55455, USA) | 1996 | Journal of Hydrodynamics1996，8，2： | 5 |
| 5 | Lie Algebra of Derivations of the Algebra of Differential Operators显示文摘The 2-cocycles on the algebra of differential operators was studied in Fef. [1]. In this note the Lie algebras of derivations of the algebra and the Lie algebra of differential operators are determined. 1 The Lie Algebra of Derivations of the Algebra of Differential Operators Let =C[t, t-1] be the Laurent polynomial algebra, d/dt be the differential | 赵开明 | 1993 | Chinese Science Bulletin1993，38，10： | 4 |
| 6 | Characteristics of the Outer Rainband Stratiform Sector in Numerically Simulated Tropical Cyclones:Lower-Layer Shear versus Upper-Layer Shear显示文摘Idealized numerical simulations are conducted in this study to comparatively investigate the characteristics of the stratiform sector in the outer rainbands of tropical cyclones(TCs)in lower-and upper-layer vertical wind shear(VWS)with moderate magnitude.Consistent with the results in previous studies,the outer rainband stratiform sector of the TCs simulated in both experiments is generally located downshear left.Upper-layer VWS tends to produce stronger asymmetric outflow at upper levels in the downshear-left quadrant than lower-layer shear.This stronger asymmetric outflow transports more water vapor radially outward from the inner core to the outer core at upper levels in the downshear-left quadrant in the upper-layer shear experiment.More depositional growth of both graupel and cloud ice thus occurs downshear left in upper layers in the outer core,yielding more diabatic heating and stronger upward motions,particularly in the stratiformdominated part of the stratiform sector in the upper-layer shear experiment.Resultingly,a better-organized stratiform sector in the outer rainbands is found in the upper-layer VWS experiment than in the lower-layer VWS experiment.The diabatic heating associated with the stratiform sector produces strong midlevel outflow on the radially inward side of,and weak midlevel inflow on the radially outward side of,the heating core,with lower-level inflow beneath the midlevel outflow and upper-level inflow above.The upper-layer VWS tends to produce a deeper asymmetric inflow layer in the outer rainband stratiform sector,with more significant lower-level inflow and tangential jets in the upper-layer VWS experiment. | Qi GAO Qingqing LI Yufan DAI | 2020 | Advances in Atmospheric Sciences2020，37，4： | 4 |
| 7 | Thermodynamic limits for simultaneous energy harvesting from the hot sun and cold outer space显示文摘The sun and outer space are two of the most important fundamental thermodynamic resources for renewable energy harvesting.A significant amount of work has focused on understanding the fundamental limit of energy harvesting from the sun.More recently,there have been several theoretical analyses of the fundamental limit of energy harvesting from outer space.However,far less is understood about the fundamental limits of simultaneous energy harvesting from both the sun and outer space.Here,we consider and introduce various schemes that are capable of simultaneous energy harvesting and elucidate the fundamental thermodynamic limits of these schemes.We show that the theoretical limits can far exceed the previously established limit associated with utilizing only one thermodynamic resource.Our results highlight the significant potential of simultaneous energy harvesting and indicate new fundamental opportunities for improving the efficiency of energy harvesting systems. | Wei Li Siddharth Buddhiraju Shanhui Fan | 2020 | Light(Science & Applications)2020，9，1： | 4 |
| 8 | A Case of COVID-19-Tianjin Municipality, China, November 7, 2020显示文摘On November 7,2020,Tianjin Municipality received notification from Dezhou City,Shandong Province that specimens of the outer packaging of imported frozen pork products shipped from Germany via Tianjin Port were positive for coronavirus disease 2019(COVID-19)viral nucleic acid. | COVID-Field Response Group Laboratory Testing Group Yang Song Xiang Zhao Xiaoyan Li Wenbo Xu | 2020 | China CDC weekly2020，2，46： | 4 |
| 9 | Diversity of metabolite accumulation patterns in inner and outer seed coats of pomegranate:exploring their relationship with genetic mechanisms of seed coat development显示文摘The expanded outer seed coat and the rigid inner seed coat of pomegranate seeds,both affect the sensory qualities of the fruit and its acceptability to consumers.Pomegranate seeds are also an appealing model for the study of seed coat differentiation and development.We conducted nontarget metabolic profiling to detect metabolites that contribute to the morphological differentiation of the seed coats along with transcriptomic profiling to unravel the genetic mechanisms underlying this process.Comparisons of metabolites in the lignin biosynthetic pathway accumulating in seed coat layers at different developmental stages revealed that monolignols,including coniferyl alcohol and sinapyl alcohol,greatly accumulated in inner seed coats and monolignol glucosides greatly accumulated in outer seed coats.Strong expression of genes involved in monolignol biosynthesis and transport might explain the spatial patterns of biosynthesis and accumulation of these metabolites.Hemicellulose constituents and flavonoids in particular accumulated in the inner seed coat,and candidate genes that might be involved in their accumulation were also identified.Genes encoding transcription factors regulating monolignol,cellulose,and hemicellulose metabolism were chosen by coexpression analysis.These results provide insights into metabolic factors influencing seed coat differentiation and a reference for studying seed coat developmental biology and pomegranate genetic improvement. | Gaihua Qin Chunyan Liu Jiyu Li Yongjie Qi Zhenghui Gao Xiaoling Zhang Xingkai Yi Haifa Pan Ray Ming Yiliu Xu | 2020 | Horticulture Research2020，7，1： | 4 |
| 10 | Development of Cryogenic Disinfectants Using in-18℃and-40℃Environments—Worldwide,2021显示文摘Introduction:Since the outbreak of coronavirus disease 2019(COVID-19)in Beijing Xinfadi Wholesale Market,a series of COVID-19 outbreaks has indicated the threat of transmission due to outer surfaces of objects under low temperatures.Therefore,2 kinds of chlorine-containing disinfectants for−18℃and−40℃were developed in order to solve the problem of low temperature disinfection.Methods:The properties of two cryogenic disinfectants were evaluated by low-temperature test.Staphylococcus aureus and Escherichia coli were used as two indicator microorganisms to evaluate the effects of the two cryogenic disinfectants in the laboratory and field tests according to Technical Specifications for Disinfection(2002 version)and Test method for bactericidal effect of disinfectants in laboratory(GB/T 38502-2020).Results:Two disinfectants could remain in the liquid state at−18℃or−40℃in 72 hours without crystallization and precipitation,and the average log values of microbial reduction before and after disinfection(the average killing log value)both on Staphylococcus aureus and Escherichia coli were>3 in the laboratory and field tests.Discussion:The results showed that these two disinfectants remained functional at low temperature to disinfect the packaging of imported cold chain food and surrounding packaging to prevent transmission of COVID-19 from material to people. | Huihui Sun Hongyang Duan Wei Zhang Chen Liang Luyao Li Yuan Lyu Yanyan Chen Jin Shen Liubo Zhang | 2021 | China CDC weekly2021，3，13： | 4 |
| 11 | Molecular architecture of the luminal ring of the Xenopus laevis nuclear pore complex显示文摘The nuclear pore complex(NPC)mediates the flow of substances between the nucleus and cytoplasm in eukaryotic cells.Here we report the cryo-electron tomography(cryo-ET)structure of the luminal ring(LR)of the NPC from Xenopus laevis oocyte.The observed key structural features of the LR are independently confirmed by single-particle cryo-electron microscopy(cryo-EM)analysis.The LR comprises eight butterfly-shaped subunits,each containing two symmetric wings.Each wing consists of four elongated,tubular protomers.Within the LR subunit,the eight protomers form a Finger domain,which directly contacts the fusion between the inner and outer nuclear membranes and a Grid domain,which serves as a rigid base for the Finger domain.Two neighboring LR subunits interact with each other through the lateral edges of their wings to constitute a Bumper domain,which displays two major conformations and appears to cushion neighboring NPCs.Our study reveals previously unknown features of the LR and potentially explains the elastic property of the NPC. | Yanqing Zhang Sai Li Chao Zeng Gaoxingyu Huang Xuechen Zhu Qifan Wang Kunpeng Wang Qiang Zhou Chuangye Yan Wusheng Zhang Guangwen Yang Minhao Liu Qinghua Tao Jianlin Lei Yigong Shi | 2020 | Cell Research2020，30，6： | 4 |
| 12 | E型沙眼衣原体MOMP基因重组腺病毒的构建及免疫原性研究显示文摘目的:构建E型沙眼衣原体(Ct)主要外膜蛋白(MOMP)基因重组腺病毒,为沙眼衣原体腺病毒疫苗的研究奠定基础。方法:根据Genebank中E型Ct MOMP基因序列设计引物,用高保真PCR方法从E型Ct基因组DNA中扩增得到MOMP基因片段,克隆至pcDNAII载体,测序后连接入腺病毒穿梭载体pDC316。穿梭载体pDC316-MOMP与含腺病毒基因组的辅助质粒PBHGlox△E1,3Cre共转染至HEK293细胞,在Cre-loxP重组酶作用下进行重组,包装成重组腺病毒颗粒,用PCR和RT-PCR方法进行鉴定。并用动物免疫试验检测重组腺病毒的免疫原性。结果:从E型Ct基因组DNA中扩增出约1.1 kb的特异MOMP基因片段,酶切鉴定及DNA序列测定证实穿梭载体pDC316-MOMP构建正确。穿梭载体pDC316-MOMP与含腺病毒基因组的辅助质粒PBHGlox△E1,3Cre共转染至293细胞,出现明显细胞病变效应。收集重组腺病毒,PCR法证实重组腺病毒含有MOMP基因,RT-PCR证实重组腺病毒在293细胞能表达MOMP基因。重组腺病毒免疫小鼠可诱导特异性抗体产生,证明重组腺病毒具有良好免疫原性。结论:成功构建了E型沙眼衣原体MOMP基因重组腺病毒,该重组腺病毒可诱导小鼠产生特异性抗体。 | 吕慧 赵蔚明 于修平 郑燕 王红 周亚滨 齐眉 于晗 杨熙 | 2006 | 山东大学学报(医学版)2006，44，12： | 4 |
| 13 | Natural and engineered bacterial outer membrane vesicles显示文摘Bacterial outer membrane vesicle(OMV)is a kind of spherical lipid bilayer nanostructure naturally secreted by bacteria,which has diverse functions such as intracellular and extracellular communication,horizontal gene transfei;transfer of contents to host cells,and eliciting an immune response in host cells.In this review,several methods including ultracentrifugation and precipNation for isolating OMVs were summarized.The latest progresses of OMVs in biomedical fields,especially in vaccine development,cancer treatment,infection control,and bioimaging and detection were also summarized in this review.We highlighted the importance of genetic engineering for the safe and effective application and in facilitating the rapid development of OMVs.Finally,we discussed the bottleneck problems about OMVs in preparation and application at present and put forward our own suggestions about them.Some perspectives of OMVs in biomedical field were also provided. | Guangchao Qing Ningqiang Gong Xiaohui Chen Jing Chen Hong Zhang Yongchao Wang Ruifang Wang Shouwen Zhang Zhen Zhang Xianxian Zhao Yang Luo Xing-Jie Liang | 2019 | Biophysics Reports2019，5，4： | 4 |
| 14 | A phylum level analysis reveals lipoprotein biosynthesis to be a fundamental property of bacteria显示文摘Bacterial lipoproteins are proteins that are post-trans-lationally modified with a diacylglyceride at an N-terminal cysteine,which serves to tether these proteins to the outer face of the plasma membrane or to the outer membrane.This paper reviews recent insights into the enzymology of bacterial lipoprotein biosynthe-sis and localization.Moreover,we use bioinformatic analyses of bacterial lipoprotein signal peptide features and of the key biosynthetic enzymes to consider the distribution of lipoprotein biosynthesis at the phylum level. | Iain C.Sutcliffe Dean J.Harrington Matthew I.Hutchings | 2012 | Protein & Cell2012，3，3： | 3 |
| 15 | Thermal analysis of the baffle structure of the Solar Space Telescope显示文摘The SST(Space Solar Telescope) is an astronomical telescope with a primary mirror of 1 m in diameter.It observes the sun with a small view field to ensure that its high spatial resolution imaging has 0.1″-0.15″ and high SNR(signal to noise ratio).Surrounding the small view field is still the sun,which is an intense source of both heat and stray light.The baffles(the main baffle,the aperture,and the outer baffle),which are used to eliminate the stray light,will change the thermal flux in the SST and will weaken the effect of the thermal control design.In this study,the compatibility analysis of the thermal effect of baffle structures in SST is performed.The GCF(Geometry Composing Function) and BRDF(Bidirectional Reflectance Distribution Function),which are two inherent related parameters in the compatibility analysis,are derived.The objective and method of the compatibility analysis are determined.With the thermal analysis software,the temperature fields are calculated for different lengths of the main baffle,different radii of apertures,different lengths of the outer baffle with a 3' tilt angle and 16' tilt angle,and different tilt angles of the outer baffle with a 200 mm length.A series of configurations and sizes of the baffles are studied with the goals of both thermal control and elimination of stray light.The design of the baffle structure of SST is achieved:the main baffle of length 4100 mm,the internal shield of radius 494 mm,the outer baffle of length 200 mm,and the outer baffle of tilt angle 3' are successfully designed.This paper presents the relationship between the thermal control design and stray light elimination plan in the SST.The aims of the optimal design of the baffle structure of SST are reached.The thoughts and methods of the optimal analysis are also useful for similar optical telescopes designed for solar observation. | LI Rong1,2,3 & WANG Sen1,3 1 National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 3 Key Laboratory of Solar Activity,National Astronomical Observatories of Chinese Academy of Sciences,Beijing 100012,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，9： | 3 |
| 16 | Fifty years of plate tectonics显示文摘What would you put on your list of the great scientific revolutions of the twentieth century?Genetics?General relativity?Something to do with quantum mechanics,perhaps?One discovery that must be on that list is the theory of plate tectonics—the principle of how the rigid outer shell of our Earth(its lithosphere)moves and recycles.It provides a unifying | Yong-Fei Zheng | 2018 | National Science Review2018，5，2： | 3 |
| 17 | Lipofuscins prepared by modification of photoreceptor cells via glycation or lipid peroxidation show the similar phototoxicity显示文摘AIM To investigate the effect of two ways of lipofuscin production(lipid peroxidation and glycation) on lipofuscin fluorescence characteristics and phototoxicity and to compare them with the properties of natural lipofuscin.METHODS Model lipofuscins were prepared on the basis of bovine photoreceptor outer segments(POS) with bisretinoid A2 E addition. One set of samples was prepared from POS modified by lipid peroxidation,while another set from POS modified by glycation with fructose. Fluorescent properties and kinetics of photoinduced superoxide generation of model lipofuscins and human retinal pigment epithelium(RPE) lipofuscin were compared. The fluorescence spectra of samples were measured at 365 nm excitation wavelength and 380-650 emission wavelength. RESULTS The fluorescence spectra of model lipofuscins are almost the same as the spectrum of natural lipofuscin. Visible light irradiation of both model lipofuscins and natural lipofuscin isolated from RPE cells leads to decrease of a fluorescence maximum at 550 nm and to appearance of a distinct,new maximum at 445-460 nm. The rate of photogeneration of reactive oxygen forms by both model lipofuscins was almost the same and approximately two times less than that of RPE lipofuscin granules.CONCLUSION These data suggest that fluorescent characteristics and phototoxicity of lipofuscin granules depend only to an insignificant degree on the oxidative modification of POS proteins and lipids,and generally are defined by the bisretinoid fluorophores contained in them. | Alexander Dontsov Anna Koromyslova Mikhail Ostrovsky Natalia Sakina | 2016 | World Journal of Experimental Medicine2016，6，4： | 3 |
| 18 | Scientific aspirations of the Chinese Space Station program:an interview with Ming Gao显示文摘On 17 June 2021,Chinas spacecraft Shenzhou 12 took three Chinese astronauts into the Earth's orbit and docked with the assembly of Tianhe and Tianzhou,the core module and cargo ship of the Chinese Space Station(CSS),which had been launched and assembled in orbit earlier this year.The three astronauts became the first visitors of the CSS and would stay in orbit for about three months.In 2022,two laboratory cabin modules,Wentian and Mengtian,will be launched and assembled into Tianhe,completing the basic structure of the CSS.The CSS is designed to be used for at least 10 years,and will provide an outer space experimental platform for researchers from multiple disciplines. | 赵维杰 | 2021 | National Science Review2021，8，11： | 2 |
| 19 | Functional conservation of the grapevine candidate gene INNER NO OUTER for ovule development and seed formation显示文摘Seedlessness represents a highly appreciated trait in table grapes.Based on an interesting case of seedless fruit production described in the crop species Annona squamosa,we focused on the Vitis vinifera INNER NO OUTER(INO)gene as a candidate.This gene encodes a transcription factor belonging to the YABBY family involved in the determination of abaxial identity in several organs.In Arabidopsis thaliana,this gene was shown to be essential for the formation and asymmetric growth of the ovule outer integument and its mutation leads to a phenotypic defect of ovules and failure in seed formation.In this study,we identified in silico the V.vinifera orthologue and investigated its phylogenetic relationship to INO genes from other species and its expression in different organs in seeded and seedless varieties.Applying cross-species complementation,we have tested its functionality in the Arabidopsis ino-1 mutant.We show that the V.vinifera INO successfully rescues the ovule outer integument growth and seeds set and also partially complements the outer integument asymmetric growth in the Arabidopsis mutant,differently from orthologues from other species.These data demonstrate that VviINO retains similar activity and protein targets in grapevine as in Arabidopsis.Potential implications for grapevine breeding are discussed. | Valentina di Rienzo Zahra Imanifard Isabella Mascio Charles SGasser Debra JSkinner Ciro Leonardo Pierri Martina Marini Valentina Fanelli Wilma Sabetta Cinzia Montemurro Diana Bellin | 2021 | Horticulture Research2021，8，1： | 2 |
| 20 | Residual finiteness of outer automorphism groups of certain 1-relator groups显示文摘We prove that certain 1-relator groups have Property E. Using this fact, we characterize all conjugacy separable 1-relator groups of the form a,b;(a-αbβaαbγ)t , t 1, having residually finite outer automorphism groups. | KIM Goansu TANG C. Y. | 2009 | Science China Mathematics2009，52，2： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员