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The Women Characters of the 1930s in the Chinese TV Serials
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作者 周时娥 张雯 《海外英语》 2011年第13期278-280,共3页
The women of the 1930s in the Chinese TV serials deduct inspiring stories.They play different roles in the big wealthy families such as mothers-in-law,daughters-in-law,and maidservants.There are unceasing conflicts be... The women of the 1930s in the Chinese TV serials deduct inspiring stories.They play different roles in the big wealthy families such as mothers-in-law,daughters-in-law,and maidservants.There are unceasing conflicts between these women,because of their struggle for men's love,wealth or social position.The theme of their stories is always about fertility,love,kindness and evil,with the ending being either comic or tragic.The stories of various kinds of women of the 1930s in the Chinese TV serials decorate and enrich the lives of many of us latecomers and their names are passed on from generation to generation. 展开更多
关键词 WOMEN characters 1930s TV sERIALs
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Lytic Characteristics and Identification of Two Alga-lysing Bacterial Strains 被引量:4
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作者 PEI Haiyan HU Wenrong 《Journal of Ocean University of China》 SCIE CAS 2006年第4期368-374,共7页
All previously reported bacterial species which are capable of lysing harmful algae have been isolated from coastal environments in which harmful algae blooms have occurred. Due to the low concentration of alga-lysing... All previously reported bacterial species which are capable of lysing harmful algae have been isolated from coastal environments in which harmful algae blooms have occurred. Due to the low concentration of alga-lysing bacteria in an algal bloom, it is difficult to isolate the alga-lysing bacteria by existing methods. In this paper, two algae-lysing bacterial strains, P01 and P03, have been isolated from a biosystem immobilized on a sponge that was highly effective in removing algae and microcystins. Their lysing modes and effects on Microcystis aeruginosa have been studied. The results show that the degradation processes of these two strains for M. aeruginosa accorded with a first-order reaction model when the chlorophylla concentration was in the range from 0 to 1000 μgL-1. The degradation rate constants were 0.1067, 0.1274 and 0.2792 for P01 and0.0683, 0.0744 and 0.028 97 for P03, when the bacterial densities were 8.6 × 105, 8.6 × 106 and 8.6 × 107cells mL-1 respectively. Moreover, the two bacterial strains had favourable lytic effects not only on M. aeruginosa , but also on Chlorella and Scene-desmus. Their lytic effect on M. aeruginosa did not require physical cell to cell contact, but proceeded by the production of an extracellular product. The bacterial strains were identified as Bacillus species by PCR amplification of the 16S rRNA gene, BLAST analysis, and comparison with sequences in the GenBank nucleotide database. 展开更多
关键词 alga-lysing bacteria lytic character 16s rDNA BACILLUs
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Critical Analysis on Characters of Pearl S.Buck' the Good Earth
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作者 韩娇阳 王可可 潘晓燕 《海外英语》 2013年第8X期213-216,共4页
Since the publication of the Good Earth in 1922, Pearl S, Buck published another two novels based on the same theme and they were called the House of Earth Trilogy. The House of Earth Trilogy used as a window to under... Since the publication of the Good Earth in 1922, Pearl S, Buck published another two novels based on the same theme and they were called the House of Earth Trilogy. The House of Earth Trilogy used as a window to understand China for the westerners at that time. And it had a great impact on the whole world. People gave two different views on her success of winning so many awards. Some thought that she wrote what she knew and her works were based on her own experiences. But others said that she was a foreigner and her values, her distinct aesthetic views would affect her writing. So, some of her depictions, to some extent, were untruthful and distorted. The aim of writing this thesis is to give an objective judgment on the Good Earth, and make it easier for us to communicate with the westerners on literature. 展开更多
关键词 the GOOD EARTH PEARL s. BUCK characters’Perspectiv
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Studies on Breeding and Application of Thermo-sensitive Genie Male Sterile Line 402S in Brassica napus Ⅰ. Hie Breeding Procedure and Character of 402S 被引量:2
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作者 WuXianmeng XiDaiwen +1 位作者 NingZuliang DeangXixing 《Hunan Agricultural Science & Technology Newsletter》 2001年第3期12-15,共4页
A new rapeseed TGMS line 402S has been bred through six years with seven generations by hybridization and systematic breeding.402S possesses the similar thermo-sensitive male sterility to its female parent Xiangyou 91... A new rapeseed TGMS line 402S has been bred through six years with seven generations by hybridization and systematic breeding.402S possesses the similar thermo-sensitive male sterility to its female parent Xiangyou 91S which performed fertile,partially sterile and sterile throughout the flowering stage,and resembles its male parent Zhongshuang 4 on agronomic traits.And 402S has the double-low (low erutic acid and low glucosinolate) quality like its original parents. 展开更多
关键词 Brassica napus TGMs line 402s BREEDING character
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Interpretation of S-Wave Data from Fanshi-Taipusiqi DSS Profile and Analysis of Correlation between Deep Structural Characteristics and Seismicity 被引量:1
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作者 Zhou Xuesong,Song Songyan,Zhang Xiankang,Qiu Shuyan,Gong Yi,and Song JianliResearch Center of Exploration Geophysics,SSB,Zhengzhou 450003,China 《Earthquake Research in China》 1998年第1期27-36,共10页
By processing S-wave data from the Fanshi-Huai’an-Taipusiqi DSS profile,which is a three-component,wide-angle reflection/refraction profile,and in the light of the results from P-wave interpretation,two-dimensional(2... By processing S-wave data from the Fanshi-Huai’an-Taipusiqi DSS profile,which is a three-component,wide-angle reflection/refraction profile,and in the light of the results from P-wave interpretation,two-dimensional(2-D)structures of the crust and upper mantle are presented,including S-wave velocity Vs and the physical parameter of medium-Poisson’s ratio a.Taking other geological and geophysical information into account,and with reference to the results from petrophysical experiments at home and abroad,we carried out interpretation and inference with respect to deep crustal structure,tectonics,and lithologic characters.It has been concluded that in the upper and middle crust,a values are mostly not greater than 0.25,and rocks,which generally assume brittle,are mainly composed of granite; the rocks in the lower layer of the upper crust between Yangyuan-Huai’an containing inorganic CO2 itself releases carbon; for the rocks in the lower crust and crust-mantle transitional zone,which are comparatively 展开更多
关键词 s-WAVE velocity Poisson’s ratio lithologic character ultra-crustal fault earthquakes.
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The types and characteristics of man-induced sediment disaster
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作者 JIN Desheng, SHI Changxing, CHEN Hao, ZHANG Ouyang(Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China) 《Journal of Geographical Sciences》 SCIE CSCD 2002年第4期495-504,共10页
The man-induced sediment disaster includes material erosion, transportation and accumulation by human activities. It possesses special attribute in sociology and disaster science. In accordance with human activities, ... The man-induced sediment disaster includes material erosion, transportation and accumulation by human activities. It possesses special attribute in sociology and disaster science. In accordance with human activities, geomorphologic location, behavior and particular, the man-induced sediment disaster can be divided into 4 types: the drainage network, slope and gully, channel and plain-estuary-coastline. Each type includes erosion, transportation, accumulation, complexity and cascading. Based on human activity, geomorphology, sediment mechanics and catastrophology, the man-induced sediment disaster is characterized as follows: (1) accelerating tendency with geographical zoning back-ground; (2) non-order characters by blind action without special technical training; (3) gradually and sharply changing with human environment vibration; and (4) complexity and non-linear figure, etc. One of the reasons leading to man-induced sediment disaster is human environment vibration. 展开更多
关键词 man’s dynamics sediment disaster type character
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Evaluation of the Assistant Function with Four Zeros and all Nonprincipal Characters but X1X2X3X4
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作者 LI Yi-jun 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2006年第2期196-201,共6页
To obtain a better Vinogradov's bound, assistant function with two or three zeros and all Dirichlet's characters has been evaluated. Assistant function g(X1,X2,X3,X4)with four zeros and all nonprincipal charac... To obtain a better Vinogradov's bound, assistant function with two or three zeros and all Dirichlet's characters has been evaluated. Assistant function g(X1,X2,X3,X4)with four zeros and all nonprincipal characters but X1X2X3X4 is constructed and evaluated in the paper. And the constant obtained is 8.395 511 841 994. 展开更多
关键词 Dirichlet's character L-FUNCTION four zeros Goldbach's problem Vinogradov's bound
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S型控释氮肥运筹对水稻产量形成及氮素利用特征的影响
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作者 王树深 罗刚 +10 位作者 舒小伟 徐萱 王子涵 丁周宇 杨英 伏桐 周娟 姚友礼 黄建晔 王余龙 董桂春 《安徽农业大学学报》 CAS CSCD 2024年第3期384-396,共13页
缓控释肥具有施用次数少、肥料利用率高的特点,S型热固性树脂包膜控释氮肥(S型控释氮肥)受土壤pH影响小、肥料稳定性好。本研究以S型控释氮肥为试材,分别设置了6个水稻品种的响应比较、4种氮肥施用量、5种氮肥施用时期及7种氮肥配施比例... 缓控释肥具有施用次数少、肥料利用率高的特点,S型热固性树脂包膜控释氮肥(S型控释氮肥)受土壤pH影响小、肥料稳定性好。本研究以S型控释氮肥为试材,分别设置了6个水稻品种的响应比较、4种氮肥施用量、5种氮肥施用时期及7种氮肥配施比例的4个盆栽试验,研究其对水稻产量形成、氮素吸收利用等的影响。结果表明:1)品种比较试验中,S型控释氮肥提高了6个水稻品种的产量,增幅在2.95%~18.57%,平均增加12.60%;产量提高的原因是穗数或每穗颖花数的增加;S型缓控释氮肥可显著提高供试水稻成熟期的氮素积累量、氮肥利用率,但氮素籽粒生产效率有所下降。2)控释肥运筹试验中,随着S型控释氮肥施用量和施用比例的增加,武运粳24号的产量呈先增加后下降的趋势,分别以每盆3g纯氮处理和控释氮肥占比80%处理产量增幅最大,作基肥时增产效应更显著;成熟期氮素积累量呈增加和先增加后下降的趋势,分别以每盆4.5 g纯氮处理和控释氮肥占比80%处理增幅最大,作基肥时增幅效应更显著;氮素籽粒生产效率和氮肥利用率呈降低趋势,氮素籽粒生产效率分别以控释氮肥占比0%和控释肥作保花肥最大,氮肥利用率分别以控释氮肥占比80%和控释肥作基肥时最大。3)控释肥对根系性状影响试验中,S型控释氮肥处理提高了武运粳24号水稻栽后30天单株不定根总长、根干重与吸收面积,提高了抽穗期单株不定根总长、根干重和根活力;单株不定根数、不定根总长、根干重、根活力的增加是产量、氮素积累量和氮肥利用率协同提高的根系基础。总之,S型控释氮肥可显著提高水稻的产量和氮肥利用率,作为基肥时最优。每盆3 g纯氮处理、控释氮肥占比80%左右时产量、成熟期氮素积累量、氮肥利用率协同增加,与其栽后30天、抽穗期根系性状优化有密切关系。 展开更多
关键词 s型控释氮肥 水稻 肥料处理 产量 根系性状 氮素吸收利用
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Effects of Doping Trace Sm^(3+) and Gd^(3+) on Luminescent Character of Y_2O_2S∶Eu^(3+)
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作者 Yuan Jianhui Yuan Honghui +2 位作者 Zhang Zhenhua Cheng Yumin Wang Xiaojun 《Journal of Rare Earths》 SCIE EI CAS CSCD 2005年第4期410-410,共1页
After trace Sm^3+ ions and Gd^3+ ions doping, the emission intensity of red phosphors Y2O2S: Eu^3 + was enhanced and the voltage character (relation between emission intensity and excitation voltage) was improve... After trace Sm^3+ ions and Gd^3+ ions doping, the emission intensity of red phosphors Y2O2S: Eu^3 + was enhanced and the voltage character (relation between emission intensity and excitation voltage) was improved while the other properties of physics and chemistry were not changed. The origins of enhancement and improvement are discussed. Probably the distortion and the defect of crystals are decreased by the substitution of Gd^3+ for Y^3+ instead of Eu^3+ for Y^3+ , and thus the Eu^3+ crystal field is improved, and radiationless process and energy loss resulted from crystal defect are weakened, which leads to increased luminescence intensity and voltage character improvement. The overlapping fluorescent spectra of Y2O2S: Sm^3+ emission and Y2O2S:Eu^3+ excitation as well as Eu^3 + excitation spectra transitions spectra lead to energy transfer from Sm^3 + sensitization of Sm^3+ ions fectively. containing Sm^3+ excitation the possibility of resonance ions to Eu^3+ ions, and the to Eu^3+ ions is achieved effectively. 展开更多
关键词 luminescence sm^3 Gd^3 eodoped Y2O2s Eu^3+ enhancement of emission intensity improvement of voltage resistance character rare earths
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An Analysis of the Changes of Gulliver's Character in Gulliver's Travels
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作者 吴蒙莎 《海外英语》 2016年第21期193-194,共2页
Most of the Domestic and foreign studies of Gulliver's Travels focus on the irony of the novel, there are few studies on the character of Gulliver. This paper will study the changes of Gulliver's character thr... Most of the Domestic and foreign studies of Gulliver's Travels focus on the irony of the novel, there are few studies on the character of Gulliver. This paper will study the changes of Gulliver's character through the analysis of his travels in the four different countries, in order to contribute to a better understanding of Gulliver. 展开更多
关键词 Gulliver’s Travels GULLIVER character TRAVEL CHANGEs
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On the Character Trait of Stephen Dedalus in A Portrait of the Artist as a Young Man
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作者 胡梦巧 《海外英语》 2017年第4期152-153,共2页
A Portrait of the Artist as a Young Man is the first novel of stream of consciousness in western literature history, it mainly shows the protagonist, Stephen Dedalus' s journeys from childhood to adulthood. This p... A Portrait of the Artist as a Young Man is the first novel of stream of consciousness in western literature history, it mainly shows the protagonist, Stephen Dedalus' s journeys from childhood to adulthood. This paper aims at a better understanding of Stephen Dedalus, and it analyzes his character traits in literature analysis method, textual analysis method and Freud's theory of personality structure and is useful for further study. 展开更多
关键词 stephen character traits POsITIVE NEGATIVE Freud’s theory of personality structure
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Thermophysical and Mechanical Characterization of Poto-Poto Compressed Blocks for Use as Fill Material
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作者 Kowa K. Eric Jean Claude Damfeu +3 位作者 Pettang J. Ursulala Joel Ducourneau Paul Woafo Chispin Pettang 《Materials Sciences and Applications》 2021年第10期437-459,共23页
This article is devoted to the thermophysical and mechanical study of an eco-material, poto-poto. The objective is to study the influence of the addition of bamboo fibers on the thermophysical properties of the materi... This article is devoted to the thermophysical and mechanical study of an eco-material, poto-poto. The objective is to study the influence of the addition of bamboo fibers on the thermophysical properties of the material, while verifying that it complies with the mechanical standards in Cameroon. A double study is therefore carried out: a mechanical characterization whose objective is to determine the mechanical properties (compressive strength, flexural strength and Young’s modulus) and a thermophysical characterization whose objective is to determine the thermal conductivity. For the thermophysical characterization, the asymmetric hot plane experimental setup based on 1D quadrupole modelling was developed and simulated for the estimation of thermal effusivity E and volume heat capacity ρCp. The obtained experimental results show that the apparent thermal conductivity of the developed materials decreases with increasing fibers. Although the reference material (0% fibers) has a much higher conductivity than the ordinary sand block (1.15 Wm<sup>-1</sup> K<sup>-1</sup>), the addition of fibers, already at 2%, contributes to decrease this conductivity (0.95 Wm<sup>-1</sup> K<sup>-1</sup>). From the point of view of thermal insulation and energy savings, the thermal conductivity results obtained show that the use of these materials with a maximum fibercontent of 6% would be a better thermal insulator than sand block or compressed earth brick. The compressive strength obtained is such that Rc > 0.6 MPa. All the materials developed meet the design standards when used as infill. 展开更多
关键词 Thermoméchanical charactézisation Poto-Poto Thermal Insulation Young’s Modulus
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THE CHANGE IN CARTIMANDUA'S CHARACTER IN ANNALS 12.40 AND HISTORIES 3.45
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作者 James J.Stewart 《Journal of Ancient Civilizations》 2001年第1期93-100,共8页
关键词 THE CHANGE IN CARTIMANDUA’s character IN ANNALs 12.40 AND HIsTORIEs 3.45
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On the Creation Background and the Influence of Wei Zhuang’s Famous Poem:Lament of a Northwestern Woman
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作者 Liu Huo 《Contemporary Social Sciences》 2023年第4期109-120,共12页
Lament of a Northwestern Woman(Qin Fu Yin),composed by Wei Zhuang after the Huangchao uprising,is a long poem that showcases the sufferings of the civilians and embodies the people’s character of the poem,which is th... Lament of a Northwestern Woman(Qin Fu Yin),composed by Wei Zhuang after the Huangchao uprising,is a long poem that showcases the sufferings of the civilians and embodies the people’s character of the poem,which is the profound empathy and compassion of the poet towards the civilians’plight.The poem was written during the reign of Emperor Xizong of the Tang Dynasty in the year Gengmao(883 AD).2023 is also the year Gengmao,so this poem has existed for a remarkable 1140 years.For over a millennium,this long poem remained submerged in history until the opening of the Dunhuang Grottoes at the turn of the 20th century.The deep compassion and commiseration towards the underprivileged masses conveyed in this long poem are reminiscent of Du Fu’s renowned“Three Poems of Separation.”Moreover,it is widely believed that this poem foretells the decline of the Tang Dynasty. 展开更多
关键词 Lament of a Northwestern Woman Wei Zhuang people’s character the decline of the Tang Dynasty
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《伟大征程》的“人民性”底蕴及其政治美学表达
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作者 王玉 刘炼 《东北师大学报(哲学社会科学版)》 CSSCI 北大核心 2024年第3期85-91,共7页
《伟大征程》是继《东方红》《中国革命之歌》《复兴之路》《奋斗吧中华儿女》之后的又一部大型情景史诗,展现了中国共产党带领中国人民进行革命、建设、改革、复兴的辉煌进程。《伟大征程》不但继承与发扬了中国共产党“人民性文艺”... 《伟大征程》是继《东方红》《中国革命之歌》《复兴之路》《奋斗吧中华儿女》之后的又一部大型情景史诗,展现了中国共产党带领中国人民进行革命、建设、改革、复兴的辉煌进程。《伟大征程》不但继承与发扬了中国共产党“人民性文艺”的创作宗旨,还特别突出“人民史观”的政治审美叙事,强调中国共产党始终把“以人民为中心”作为价值追求,折射出其马克思主义的政治美学表达。《伟大征程》中的“人类命运共同体”意识,不但扩充了“人民性”的内涵,更是将其政治审美的境界提升到“人类终极关怀”的高度,推动人类和平共赢事业不断向前发展。 展开更多
关键词 《伟大征程》 政治美学 人民性
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俯冲带流体——来自(超)高压变质岩石的证据
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作者 高俊 李继磊 +1 位作者 马智佩 Reiner KLEMD 《地质学报》 EI CAS CSCD 北大核心 2024年第3期758-782,共25页
俯冲带是地球上岩浆活动、高压—超高压变质作用、中深源地震、壳幔物质交换、元素循环和铜金大规模成矿的集中发生场所。富水流体不仅调控了这些地质作用,而且也深刻影响了全球C、S等挥发分的循环。当蚀变大洋岩石圈及上覆沉积物进入... 俯冲带是地球上岩浆活动、高压—超高压变质作用、中深源地震、壳幔物质交换、元素循环和铜金大规模成矿的集中发生场所。富水流体不仅调控了这些地质作用,而且也深刻影响了全球C、S等挥发分的循环。当蚀变大洋岩石圈及上覆沉积物进入俯冲带中深部(15~300 km),伴随由葡萄石-绿纤石相至超高压榴辉岩相的递进变质作用,含水矿物在不同深度的分解造成流体释放为一连续过程。除极端高地温梯度环境之外,大多数俯冲带洋壳释放的流体为富水流体。但,俯冲带不同深度所产生的流体特征有明显差异。出露于全球造山带的高压—超高压变质地体保存了分凝体、脉体、水压致裂角砾岩等流体作用的有力证据,绿辉石、石榴子石、绿帘石等矿物中原生流体包裹体为流体的直接记录。在俯冲带中等深度(<65 km),流体是溶质含量很低的含卤化物水溶液,可含CO_(3)^(2-)、SO_(4)^(2-)、HS^(-)等组分,其所含Si、Al、Ca、Mg、Fe、Na主量元素溶质相当于海水中固化物量的2~3倍,并具大离子亲石元素(LILE)、轻元素(B、Li)富集和高场强元素(HFSE)亏损的特点。当深度≥65 km时,流体转化为类似于超临界性质的溶液,含CH_(4)、C_(2)H_(6)、H_(2)S等挥发分,其所含主量元素溶质显著增加,微量元素除LILE等外,还负载相当量的HFSE和过渡族成矿元素。俯冲带65~100 km深度,为富水流体向超临界流体转变的区间。这种流体具有“亚超临界”性质,发生了氧化还原性质和元素溶解能力的渐变,并伴随硬柱石和角闪石的最终耗尽。高压变质岩石及相关脉体的O、Sr、Nd和金属同位素示踪研究表明俯冲带流体的源区多样,有蚀变基性洋壳、地幔橄榄岩和沉积物,并保存了海底热液蚀变作用的印迹。流体以脉冲方式沿网络状裂隙呈隧道式运移和传输,规模可达千米级,时间尺度在数月至数百年。目前通过高压—超高压变质岩的研究对俯冲带流体已经有了深入的了解,但展望未来,该领域依然有诸多争议和科学问题值得探索。 展开更多
关键词 俯冲带流体 地质证据 流体相性质 化学成分 C-s循环
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繁峙-太仆寺旗剖面 S 波资料解释及深部构造特征与地震相关性分析 被引量:10
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作者 周雪松 宋松岩 +3 位作者 张先康 邱淑燕 龚怡 宋建立 《中国地震》 CSCD 北大核心 1997年第3期253-262,共10页
通过对繁峙-怀安-太仆寺旗三分向深地震测深宽角反射\折射剖面的S波资料进行处理,结合P波处理结果,给出了地壳上地幔的S波速度VS及介质物性参数泊松比σ的二维结构;综合地质及其它地球物理资料,参照国内外岩石物理参数的实... 通过对繁峙-怀安-太仆寺旗三分向深地震测深宽角反射\折射剖面的S波资料进行处理,结合P波处理结果,给出了地壳上地幔的S波速度VS及介质物性参数泊松比σ的二维结构;综合地质及其它地球物理资料,参照国内外岩石物理参数的实验结果,对地壳深部结构、构造及岩性进行了解释和推测。其结论为:中上地壳大部分地区σ值不大于025,岩石主要由花岗岩组成,整体呈脆性;其中阳原-怀安间的上地壳下层岩体,含有来自上地幔的无机CO2气体并还原释放出碳;下地壳及壳幔过渡层σ值大部分大于026,整体呈相对塑性;下地壳岩性在怀安以北地区为中酸性麻粒岩、怀安至阳原为英角闪片麻岩、阳原以南为石英岩;莫霍\过渡层主要由剖面两端的基性麻粒岩-闪岩和剖面中部地区的石英云母片岩-中性麻粒岩所组成。根据σ值的横向变化并结合震相特征,推断了阳原及张北附近的超壳断裂带和怀安的深断裂带。结合地震活动性,对地震较为集中发生的阳原上地壳下层进行了解释,认定是由于该岩体较脆硬且“漂浮”在下部的较塑性岩体之上,受超壳断裂带、区域应力场及上地幔物质上涌的影响,岩体容易在σ值显著变化的部位产生错动、滑动,引发地震,且地震多集中于σ值较小的脆硬岩体一侧。 展开更多
关键词 s波速度 泊松比 地震波 地震 相关分析 深部构造
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甘蔗S-腺苷蛋氨酸脱羧酶基因Sc-SAMDC的克隆和表达分析 被引量:17
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作者 刘金仙 阙友雄 +3 位作者 郭晋隆 许莉萍 徐景升 陈如凯 《中国农业科学》 CAS CSCD 北大核心 2010年第7期1448-1457,共10页
【目的】克隆甘蔗(Saccharum officinarum)S-腺苷蛋氨酸脱羧酶(S-adenosylmethionine decarboxylase,SAMDC)基因,并进行序列特征、原核表达和不同逆境胁迫下表达特性分析。【方法】通过对甘蔗茎全长cDNA文库测序和分析,获得SAMDC基因cDN... 【目的】克隆甘蔗(Saccharum officinarum)S-腺苷蛋氨酸脱羧酶(S-adenosylmethionine decarboxylase,SAMDC)基因,并进行序列特征、原核表达和不同逆境胁迫下表达特性分析。【方法】通过对甘蔗茎全长cDNA文库测序和分析,获得SAMDC基因cDNA全长,命名为Sc-SAMDC,并进行序列分析。随后将编码S-腺苷蛋氨酸脱羧酶的cDNA片段克隆到原核表达载体pET29a(+)中,构建融合表达质粒,转化至Esherichia coli BL21(DE3)中进行表达。最后利用定量PCR技术分析甘蔗幼苗中该基因在不同外源胁迫下的表达特性。【结果】序列分析显示,甘蔗Sc-SAMDC基因(GenBank Accession number:GQ246459)cDNA全长1968bp,存在3个读码框(袖珍读码框tORF、上游读码框uORF和主读码框mORF),mORF长1200bp,编码399个氨基酸的SAMDC酶原,预测分子量为43.6kD,该酶原含有两个高度保守的功能结构域(酶原剪切位点和PEST结构域)。原核表达产物经SDS-PAGE表明,Sc-SAMDC以融合蛋白形式表达,相对分子量约为50kD。定量PCR分析表明,Sc-SAMDC基因在聚乙二醇(PEG)、NaCl、水杨酸(SA)和H2O2外源胁迫下表达特性不同,受PEG和NaCl的诱导,受SA和H2O2的抑制。【结论】本研究成功地克隆了Sc-SAMDC基因并在原核生物中进行了表达研究,分析了该基因的表达特性,为其进一步的生物学功能研究及其应用奠定了基础。 展开更多
关键词 甘蔗 s-腺苷蛋氨酸脱羧酶 序列分析 原核表达 定量PCR
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基于C/S和B/S结合模式的病理图文报告管理系统的设计和实现 被引量:9
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作者 齐惠颖 郭永青 《计算机工程与应用》 CSCD 北大核心 2004年第12期224-226,共3页
文章在概括了病理图文报告管理系统背景知识的基础上,确定了以B/S和C/S结合模式的建设方案。详细地介绍了基于Internet和Intranet相结合技术的设计构想和程序设计原理,在系统功能部分介绍了系统的各个功能模块及其相应的功能,以及系统... 文章在概括了病理图文报告管理系统背景知识的基础上,确定了以B/S和C/S结合模式的建设方案。详细地介绍了基于Internet和Intranet相结合技术的设计构想和程序设计原理,在系统功能部分介绍了系统的各个功能模块及其相应的功能,以及系统开发过程中使用的部分关键技术。 展开更多
关键词 B/s C/s病理图文报告系统 图像采集 图像处理
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马铃薯S病毒的基因组结构与株系分化研究进展 被引量:3
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作者 吴兴泉 裴杨 陈士华 《河南农业科学》 CSCD 北大核心 2015年第1期9-12,共4页
马铃薯S病毒(potato virus S,PVS)具有明显的株系分化现象,依据病毒是否可系统侵染昆诺藜及基因序列特征可将PVS分为PVSO株系、PVSA株系、PVSO-CS株系和PVSA-CL株系。对PVS的基因组结构、株系种类、分子特征及鉴定方法等进行了综述,以... 马铃薯S病毒(potato virus S,PVS)具有明显的株系分化现象,依据病毒是否可系统侵染昆诺藜及基因序列特征可将PVS分为PVSO株系、PVSA株系、PVSO-CS株系和PVSA-CL株系。对PVS的基因组结构、株系种类、分子特征及鉴定方法等进行了综述,以期为我国PVS株系分化研究提供参考。 展开更多
关键词 马铃薯s病毒 株系 分子特征 鉴定方法
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