期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到349篇文章
< 1 2 … 18 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
玉米BON/CPN基因家族的表达模式分析及ZmBON1基因过表达载体的构建 认领 引用
1
作者 齐拙 焦鹏 +3 位作者 蒋振忠 曲静 关淑艳 马义勇 《吉林农业大学学报》 CAS CSCD 北大核心 2026年第1期28-35,共8页
Copine蛋白也称BONZAI蛋白,是一种在真核生物中广泛分布的Ca2+依赖性磷脂膜结合蛋白,在植物的多种生理活动中发挥重要作用。从玉米B73基因组数据库中筛选出2个BON/CPN家族基因,分别为ZmBON1和ZmBON3,并利用qRT-PCR方法分析该基因家... Copine蛋白也称BONZAI蛋白,是一种在真核生物中广泛分布的Ca2+依赖性磷脂膜结合蛋白,在植物的多种生理活动中发挥重要作用。从玉米B73基因组数据库中筛选出2个BON/CPN家族基因,分别为ZmBON1和ZmBON3,并利用qRT-PCR方法分析该基因家族成员在空间与胁迫处理下的表达模式;从玉米中克隆ZmBON1基因,结合生物信息学分析其蛋白质的结构与功能,最后构建过表达载体pCAMBIA3301-ZmBON1-Bar。结果表明:玉米ZmBON1与ZmBON3在空间表达上存在组织特异性,同时二者在高温下表达受到抑制,在SA、JA、ABA、低温和大斑病菌接种处理下表达被诱导。ZmBON1基因的完整CDS区为1732 bp,编码577个氨基酸的稳定亲水非分泌蛋白,分子量为63.73 kDa,理论等电点为5.37。该蛋白质定位预测在细胞质中,其结构由α-螺旋、延伸链、无规则卷曲3部分组成。该结果为后续解析ZmBON1基因在植物生长、温度胁迫与抗病反应中的生物学功能奠定理论基础。 展开更多
关键词 玉米 BON/CPN基因家族 表达模式 生物信息学
暂未订购 下载PDF
Hybrid GNN and temporal encoder models for flood forecasting in the Vu Gia–Thu Bon River Basin 认领 引用
2
作者 Dinh Huy Nguyen Ngoc Duong Vo +2 位作者 Thi Ngoc Canh Doan Thi Thu Uyen Truong Huy Cong Vu 《River》 EI CSCD 2026年第1期3-21,共19页
Flood forecasting in river networks requires models that can capture both spatial dependencies across river basins and the temporal dynamics of hydrological processes.This study proposes a hybrid approach combining Gr... Flood forecasting in river networks requires models that can capture both spatial dependencies across river basins and the temporal dynamics of hydrological processes.This study proposes a hybrid approach combining Graph Neural Networks(GNNs)with temporal sequence models,such as Long Short‐Term Memory(LSTM)networks and Transformer encoders,to forecast water levels in the Vu Gia–Thu Bon(VGTB)River Basin,a highly flood‐prone catchment in Central Vietnam.The models are trained using multi‐source historical datasets,including water level observations,rainfall records,and reservoir release data,and are evaluated for their ability to predict water levels several hours in advance.Two model variants are developed:(1)a GNN‐LSTM model,which integrates GNN spatial learning with LSTM for temporal encoding,and(2)a GNNTransformer model,which leverages a Transformer encoder to effectively capture long‐range temporal dependencies.Results show that the hybrid GNN‐temporal models significantly outperform a conventional LSTM model,with the GNNTransformer model achieving a 20–30%reduction in root‐mean‐square error(RMSE).The GNN‐LSTM model also demonstrates notable improvements,highlighting the importance of incorporating river network connectivity into flood forecasting.The study demonstrates that the hybrid models are particularly effective during major flood events,as they better capture rapid water level rises and the spatial propagation of floods.The findings suggest that integrating graphbased spatial learning with advanced temporal encoders offers a promising direction for improving flood forecasting accuracy,thereby contributing to more effective flood risk management and water resources planning. 展开更多
关键词 flood prediction graph neural networks LSTM spatiotemporal modeling transformer Vu Gia-Thu Bon River Basin water level forecasting
暂未订购 下载PDF
甘蓝型油菜Bna.BON1基因的克隆及表达分析 认领 引用
3
作者 蔡东芳 张书芬 +7 位作者 何俊平 曹金华 张书法 李莉 赵磊 王东国 刘奕孜 朱家成 《中国油料作物学报》 CAS CSCD 北大核心 2025年第3期630-640,共11页
为提高抗逆性,了解甘蓝型油菜Bna.BON1基因在遭受非生物胁迫时的调控作用,研究了甘蓝型油菜中克隆到的4个Bna.BON1同源基因,分别命名为BnaA06.BON1,BnaC03.BON1,BnaA02.BON1和BnaC02.BON1。它们编码的蛋白质均包含保守的C2和vWA结构域,... 为提高抗逆性,了解甘蓝型油菜Bna.BON1基因在遭受非生物胁迫时的调控作用,研究了甘蓝型油菜中克隆到的4个Bna.BON1同源基因,分别命名为BnaA06.BON1,BnaC03.BON1,BnaA02.BON1和BnaC02.BON1。它们编码的蛋白质均包含保守的C2和vWA结构域,定位于细胞质膜上。多重序列比对和进化分析表明,Bna.BON1蛋白与拟南芥、白菜和甘蓝等BON1蛋白高度同源。启动子分析表明Bna.BON1基因的启动子区包含光响应、激素响应和胁迫响应等多种顺式作用元件。实时荧光定量PCR发现Bna.BON1基因在不同组织中均有表达,在叶和幼茎中表达量较高。非生物胁迫处理显示,BnaA06.BON1和BnaC03.BON1的表达量受低温(4℃)和高温(40℃)显著诱导,表现出不同程度的升高;BnaA02.BON1和BnaC02.BON1的表达量受低温(4℃)、高温(40℃)、干旱和盐胁迫(Na⁃Cl)显著诱导。因此认为Bna.BON1基因在甘蓝型油菜遭受非生物逆境胁迫时发挥重要的调控作用。 展开更多
关键词 甘蓝型油菜 BON1基因 逆境 表达分析
暂未订购 下载PDF
Linear Global Temperature Correlation to Carbon Dioxide Level, Sea Level, and Innovative Solutions to a Projected 6°C Warming by 2100 认领 引用
4
作者 Thomas F. Valone 《Journal of Geoscience and Environment Protection》 2021年第3期84-135,共52页
Too many climate committees, conferences, articles and publications continue to suggest a one and a half (1.5°C) to two degrees (2&deg;C) Celsius as an achievable global limit to climate changes without estab... Too many climate committees, conferences, articles and publications continue to suggest a one and a half (1.5°C) to two degrees (2&deg;C) Celsius as an achievable global limit to climate changes without establishment of any causal link to the proposed anti-warming mechanism. A comprehensive review has found instead that observationally informed projections of climate science underlying climate change offer a different outlook of five to six-degree (5°C - 6°C) increase as “most accurate” with regard to present trends, climate history and models, yielding the most likely outcome for 2100. The most causative triad for the present warming trend from 1950 to the present is identified in this paper: 1) the tripling (3×) of world population;2) the quadrupling (4×) of carbon emissions;and 3) the quintupling (5×) of the world energy consumption. This paper presents a quantitative, linear global temperature correlation to carbon dioxide levels that has great predictive value, a short temporal feedback loop, and the finding that it is also reversible. The Vostok ice core temperature and CO2 values for the past 400,000 years, with past sea level estimates have produced the sufficiently evidential “Hansen’s Graph”. Detailed analysis results in an equation for global average temperature change and an indebted, long-term sea level rise, from even a 20 ppm of CO2 change above 290 ppm, commonly taken as a baseline for levels before 1950. Comparison to the well-known 800,000 year old Dome C ice core is also performed. The best-performing climate change models and observational analysis are seen to project more warming than the average model often relied upon. World atmosphere, temperature, and sea level trends for 2100 and beyond are analyzed. A laboratory experiment proves the dramatic heat-entrapment capability of CO2 compared to pure air, which yields insights into the future global atmospheric system. Policy-relevant climate remediation, including gigaton carbon capture, zero and negative emissions and positive individual action, are reviewed and updated, with recommendations. 展开更多
关键词 Climate Change Global Warming Global Cooling Average World Temperature Thermal Forcing Carbon Dioxide PETM Car-bon Emission Carbon Capture and Storage Carbon Sequestration Heat-Trapping
暂未订购 下载PDF
茶树Copine家族基因CsBON3的克隆与表达分析 认领 引用 被引量：3
5
作者 姚利娜 郝心愿 +4 位作者 王璐 李娜娜 曾建明 杨亚军 王新超 《茶叶科学》 CAS CSCD 北大核心 2017年第6期565-574,共10页
Copine蛋白是一类包含2个C2(N端)和1个vWA(C端)保守域的Ca2+依赖蛋白或磷脂结合蛋白,在胞内信号转导中发挥重要作用。基于序列相似性分析,从茶树转录组数据库中筛选出1条与Copine家族基因高度同源的EST序列。经测序验证该序列包含174... Copine蛋白是一类包含2个C2(N端)和1个vWA(C端)保守域的Ca2+依赖蛋白或磷脂结合蛋白,在胞内信号转导中发挥重要作用。基于序列相似性分析,从茶树转录组数据库中筛选出1条与Copine家族基因高度同源的EST序列。经测序验证该序列包含1746 bp的完整ORF,编码581个氨基酸。同源比对显示该基因与拟南芥At BON3序列相似度最高(65%),将其命名为CsBON3(Gen Bank登录号为KY435900)。生物信息学分析显示,CsBON3蛋白分子量为63.66 k D,理论等电点为5.48;具有Copine家族蛋白特有的保守结构域;属亲水性蛋白,无信号肽位点,非分泌性蛋白,无跨膜结构域。表达分析表明,CsBON3在茶树花和根系中表达量最高,茎干和成熟叶中表达量最低。低温(4℃)处理茶树1 d后,其表达被显著上调;在生长阶段,该基因表达量高于休眠阶段;同时在接种炭疽菌的茶树叶片中,该基因也被快速上调,表明该基因可能与茶树低温、生长发育及抗病相关。 展开更多
关键词 茶树 Copine家族 BON基因 逆境胁迫响应 休眠 表达分析
暂未订购 下载PDF
中国生物多样性监测网络建设:从CForBio到Sino BON 认领 引用 被引量：74
6
作者 马克平 《生物多样性》 CAS CSCD 北大核心 2015年第1期1-2,共2页
生物多样性监测网络的建设在近年来得到了快速发展,特别是在联合国《生物多样性公约》爱知目标（2011–2020生物多样性战略规划,www.cbd.int/sp/）的推动下（马克平,2011a）,从全球到区域和国家尺度,都在加强生物多样性监测工作,以期为... 生物多样性监测网络的建设在近年来得到了快速发展,特别是在联合国《生物多样性公约》爱知目标（2011–2020生物多样性战略规划,www.cbd.int/sp/）的推动下（马克平,2011a）,从全球到区域和国家尺度,都在加强生物多样性监测工作,以期为生物多样性保护及其进展评估提供翔实可靠的数据（马克平,2011b）。 展开更多
关键词 生物多样性监测 CForBio Sino BON 马克平 生物多样性保护 国家尺度 全球尺度 翔实可靠 爱知 biodiversity
暂未订购 下载PDF
TOPK抑制剂HI-TOPK-032对胰腺神经内分泌肿瘤BON-1细胞体外恶性表型的影响 认领 引用 被引量：3
7
作者 郭鑫 李刚 +6 位作者 叶辰 阿卜杜·海拜尔·萨杜拉 任思谦 袁蒙 孟猛 钱海利 原春辉 《肝胆胰外科杂志》 CAS 2021年第5期285-291,297,共7页
目的杀伤性T细胞来源的蛋白激酶(T-lymphokine activated killer cell-originated protein kinase,TOPK)高表达与肿瘤增殖、凋亡、侵袭和转移密切相关。本研究旨在探讨使用TOPK抑制剂HI-TOPK-032对胰腺神经内分泌肿瘤细胞BON-1体外恶性... 目的杀伤性T细胞来源的蛋白激酶(T-lymphokine activated killer cell-originated protein kinase,TOPK)高表达与肿瘤增殖、凋亡、侵袭和转移密切相关。本研究旨在探讨使用TOPK抑制剂HI-TOPK-032对胰腺神经内分泌肿瘤细胞BON-1体外恶性表型的抑制作用。方法通过蛋白免疫印迹实验检测人正常胰腺导管上皮细胞和不同胰腺肿瘤细胞系中TOPK的蛋白表达水平;CCK-8实验检测HI-TOPK-032对BON-1细胞增殖的影响;克隆形成实验检测HI-TOPK-032对BON-1细胞体外克隆形成的影响;Transwell实验检测HI-TOPK-032对BON-1细胞迁移和侵袭能力的影响;流式细胞仪检测HI-TOPK-032对BON-1细胞周期的影响;Annexin V检测HI-TOPK-032对BON-1细胞凋亡和坏死的影响。结果与正常胰腺导管上皮细胞相比,胰腺神经内分泌肿瘤细胞BON-1中TOPK蛋白表达显著上调;在体外实验中,与对照组相比,在含1、2.5、5μmol/L浓度的HI-TOPK-032培养基中,BON-1细胞增殖能力依次减弱(22.2±8.2)%、(90.4±1.0)%、(89.7±0.9)%(P<0.001),克隆形成依次减少(19.1±2.1)%、(42.5±5.7)%、(87.0±5.6)%(P<0.001),迁移能力依次减弱(9.3±5.6)%、(70.5±4.0)%、(87.5±3.5)%(P<0.01),侵袭能力依次减弱(23.0±4.2)%、(60.7±5.4)%、(93.6±3.0)%(P<0.01);在含2.5、5μmol/L浓度HI-TOPK-032培养基中,G0/G1期的BON-1细胞比例分别增加(12.2±2.0)%、(18.3±1.4)%(P<0.001),在5μmol/L浓度时,S期的细胞比例减少(18.4±6.1)%(P<0.01),在2.5、5μmol/L浓度时,G2/M期的细胞比例分别减少(17.6±8.6)%、(16.4±4.5)%(P<0.001);HI-TOPK-032促进BON-1细胞凋亡和坏死,凋亡依次增加(60.6±30.9)%、(79.5±27.5)%、(165.8±34.9)%(P<0.05),5μmol/L浓度时,坏死显著增加,增加(385.8±67.3)%(P<0.001)。结论TOPK靶向抑制剂HI-TOPK-032显著抑制BON-1细胞的体外恶性表型,抑制效果呈剂量依赖式。HI-TOPK-032能调控BON-1细胞周期,促进凋亡和坏死。TOPK抑制剂HI-TOPK-032可能在胰腺神经内分泌肿瘤的靶向治疗中发挥重要作用。 展开更多
关键词 杀伤性T细胞来源的蛋白激酶(TOPK) TOPK抑制剂(HI-TOPK-032) 胰腺神经内分泌肿瘤 BON-1细胞
暂未订购 下载PDF
STUDY ON THE SEQUENCE STRUCTURE OF SBR BY 13C—NMR METHOD Ⅰ. ASSIGNMENT FOR UNSATURAT CARBONS SPECTRA 认领 引用
8
作者 焦书科 陈晓农 +1 位作者 胡力平 严宝珍 《Chinese Journal of Polymer Science》 SCIE EI CAS 1990年第1期17-24,共8页
The sequence structures of emulsion-processed SBR and solution-processed (by lithium catalyst) SBR were investigated by 13C-NMR spectroscopy. Seventeen peaks within unsaturated carbon region were recorded under the... The sequence structures of emulsion-processed SBR and solution-processed (by lithium catalyst) SBR were investigated by 13C-NMR spectroscopy. Seventeen peaks within unsaturated carbon region were recorded under the adopted experimental conditions. Assignments for these peaks were made by empirical-parameter-evaluation method. 展开更多
关键词 Sequence distribution 13C-NMR spectra of SBR Peak assignment for olefinic car- bon atoms.
暂未订购 下载PDF
Effect of KCI on Growth of Carbon Fibers During Carbonization of Phenolic Resin 认领 引用 被引量：1
9
作者 WU Xiaoxian LI Hongxia +2 位作者 LIU Guoqi YANG Wengang MA Tianfei 《China's Refractories》 CAS 2016年第2期7-11,共5页
Effects of the KCI additions （1%, 3%, 5% and 7% of the phenolic resin mass ） on phase composition and microstructure of the resin carbon and the growth mechanism of carbon fibers were investigated by using commercia... Effects of the KCI additions （1%, 3%, 5% and 7% of the phenolic resin mass ） on phase composition and microstructure of the resin carbon and the growth mechanism of carbon fibers were investigated by using commercial liquid phenolic resin as carbon source and micron-scaled KCl us catalyzer, mixing, hexamethylene- tetramine solidification treating, carbon-embedded firing at 1 000 ℃ for 3 h in order to accelerate the graphitization of phenolic resin during carbonization. The results show that the graphitization degree of resin carbon is im- proved by catalysis of KCl, numerous carbon fibers with 30 - 200 nm in diameter and 10 - 20 μm in length and sheet-like carbon in situ grow in resin carbon. The opti- mal addition of KCl is 5% when lots of carbon fibers can be found in resin carbon, and doo2 diffraction peak of graphite appears obviously in the XRD pattern. The growth mechanism of carbon fiber is that the molten KCl at high temperatures absorbs carbonaceous gas from the decomposition of phenolic resin, accelerating the diffu- sion of solid C atoms in liquid KCl ; after the dissolution of C saturates, carbon atoms separate continuously in lo- cal parts to form carbon fibers or flakes ; meanwhile, the concentration gradient formed by local carbon atoms in the melt offers growth drive for the separation of carbon fibers or flakes on KCl surface. 展开更多
关键词 potassium chloride phenolic resin car-bon fibers catalyzer
暂未订购 下载PDF
RTSE DRUGDGON MONASTERY ATYPICAL BON RELIGION MONASTERY 认领 引用
10
作者 CHENG DAN 《China's Tibet》 2007年第6期26-39,共14页
My First Visit to Rtse Drugdgon Monastery I first heard about Bon religion through a friend ten years ago.Having heard from him how people refer to Bon religion as an"evil religion"and sometimes a"black... My First Visit to Rtse Drugdgon Monastery I first heard about Bon religion through a friend ten years ago.Having heard from him how people refer to Bon religion as an"evil religion"and sometimes a"black religion",I became quite terrified.In fact,Bon religion was actually the original Tibetan religion. Piously I prayed:"If one day I visit Tibet,please do not let me encounter Bon religion!" 展开更多
关键词 PI In RTSE DRUGDGON MONASTERY ATYPICAL BON RELIGION MONASTERY BON
暂未订购 下载PDF
THE BON RELIGION 认领 引用
11
《China's Tibet》 1997年第2期44-44,共1页
关键词 BON THE BON RELIGION
暂未订购 下载PDF
A BON RELIGION VILLAGE 认领 引用
12
《China's Tibet》 2002年第6期30-33,共4页
Editor’s Note: This writer went to Tibet in the summer of 1994, and visited Wenbu in Nyima County, a village dating back to ancient times.
关键词 BON A BON RELIGION VILLAGE
暂未订购 下载PDF
PreMACE/CytaBON方案治疗难治性复发性非霍奇金氏淋巴瘤 认领 引用
13
作者 郭丽蓉 刘广金 《临床医药实践》 2005年第3期229-229,共1页
关键词 PreMACE/Cyta BON 治疗方案 化学治疗 复发 非霍奇金氏淋巴瘤
暂未订购 下载PDF
Detection and Delineating of Hydrocarbon Contaminants by Using Time and Frequency Analysis of Ground Penetrating Radar 认领 引用
14
作者 José Vicente Fuente 《Journal of Geoscience and Environment Protection》 2021年第12期35-56,共22页
This paper provides the results of using ground penetrating radar (GPR) method to detect hydrocarbon products (diesel and gasoline) in a controlled lab test. The work addresses the environmental problem generated by t... This paper provides the results of using ground penetrating radar (GPR) method to detect hydrocarbon products (diesel and gasoline) in a controlled lab test. The work addresses the environmental problem generated by the uncontrolled leakage of hydrocarbon products and the subsequent contamination of plumes in the subsoil. Most of the research proposes the geophysical techniques to evaluate the plumes but some controversial were discussed on how it affected the electrical and dielectric response depending on the excitation of the non-invasive method. The present work focuses on a comparative analysis of some signal attributes of the GPR traces to determine under what premises the detection is properly done. These signal attributes were from the time and frequency domain as attenuation coefficient, instantaneous amplitude and frequency have been considered to analyze three different soil samples. The laboratory tests consist of buried liquid (total hydrocarbon of petroleum, so called TPH) bags in the soil sample boxes reveal the range of target detection and consistency of data on the controlled test regarding the dielectric soil characterization and the delimiting position and depth. Instantaneous amplitude and time-frequency shift are revealed as promising signal attributes to accurate detection of the TPH presence. Numerical simulation data were also carried out to interpret the signal reflections on radargrams and to confirm experimental trends and the benefits of using the above signal attributes in time-frequency domain. 展开更多
关键词 Time-Frequency Analysis Instantaneous Amplitude GPR Survey Hydrocar-bon Products
暂未订购 下载PDF
Divination Practices Unique to the Bon Religion and Related Rituals 认领 引用
15
《China's Tibet》 2001年第2期25-26,共2页
关键词 Divination Practices Unique to the Bon Religion and Related Rituals
暂未订购 下载PDF
Isolation and Identification of Burkholderia gladioli pathovar cocovenenans from Black Fungus and Characteristics of the Bon Gene Cluster-Shanghai Municipality,China,2023 认领 引用
16
作者 Quan Xiao Chengbing Dai +9 位作者 Xinyu Hong Zhixin Fang Jiawei Zhao Haijian Zhou Xin Liu Libei Xiong Qingli Dong Min Chen Huanyu Wu Hongzhi Zhang 《China CDC weekly》 SCIE CSCD 2025年第25期869-873,共5页
Objective:Burkholderiagladioli(B.gladioli)pathovar cocovenenans(BG),a foodborne pathogen,can cause lethal poisoning.Most cases have been reported_in China,primarily originating from fermented cereal products.In this s... Objective:Burkholderiagladioli(B.gladioli)pathovar cocovenenans(BG),a foodborne pathogen,can cause lethal poisoning.Most cases have been reported_in China,primarily originating from fermented cereal products.In this study,we investigated the prevalence of BGC contamination in commercially available fungi and analyzed the environmental conditions for bongkrekic acid(BA)production in Shanghai.BA testing and animal experiments were conducted to confirm the relationship between bon genes and BA biosynthesis,and to clarify the causes of poisoning.Methods:The association between the bon gene cluster and BA synthesis was analyzed through whole-genome sequencing and animal testing to identify the gene cluster responsible for BA synthesis.Results:The overall detection rate of B.gladioli in the 85 samples was 44.7%(38/85).The highest detection rate was in dried black fungus(94.4%;34/36),followed by fresh Tremella fuciformnis(T.fuciformis)(16.6%;2/12),fresh black fungus(9.1%;1/11),and dried T.fuciformis(3.8%;1/26).BGC was detected only in dried black fungus,with a detection rate of 39%(14/36).In the crude extract solutions obtained from the 14 BGC cultures,BA concentrations ranged from 0.33 μg/mL to 714.83 μg/mL.Both the crude extract solution and the ten.-fold concentrated solution caused death in mice.Conclusion:The results of this study demonstrate that all BGC strains carry the bon gene cluster encoding BA,indicating that bonABCDFGHIJKLM plays an essential role in the biosynthesis of BA. 展开更多
关键词 fermented cereal productsin commercially available fungi pathovar cocovenenans bon genes animal experiments Burkholderia gladioli bongkrekic acid ba production foodborne pathogencan
云南省市售木耳、银耳中唐菖蒲伯克霍尔德氏菌污染调查及毒力基因分析 认领 引用 被引量：2
17
作者 何玉凤 杨祖顺 +4 位作者 杨菁 罗荣爱 马妮 陈敏 汤晓召 《食品安全质量检测学报》 CAS 2026年第1期146-154,共9页
目的调查云南省2022—2024年食用菌中唐菖蒲伯克霍尔德氏菌(Burkholderia gladioli)污染状况,对分离菌株进行全基因组测序,分析产毒菌株基因特征。方法从云南省采集样品724份,对分离鉴定得到的菌株进行二代全基因组测序,分析其遗传特性... 目的调查云南省2022—2024年食用菌中唐菖蒲伯克霍尔德氏菌(Burkholderia gladioli)污染状况,对分离菌株进行全基因组测序,分析产毒菌株基因特征。方法从云南省采集样品724份,对分离鉴定得到的菌株进行二代全基因组测序,分析其遗传特性、米酵菌酸生物合成相关bon基因簇携带情况。结果724份样品唐菖蒲伯克霍尔德氏菌检出率为12.85%(93/724),其中木耳、银耳检出率分别为13.20%(61/462)、12.87%(26/202),无统计学差异(P>0.05)。该菌的污染有明显的地域差异性(P0.05)。17份样品中检出携带完整bon基因簇的唐菖蒲伯克霍尔德氏菌椰毒致病变种,但产毒能力有差异,发现2株高产毒椰毒致病变种。系统发育分析表明97株分离株分在多支进化树上,部分木耳和银耳中的分离株有明显的聚类倾向,bon基因簇与核心基因组进化树高度一致。结论云南省市售木耳、银耳中的唐菖蒲伯克霍尔德氏菌污染有明显地域差异性,应对高风险地州实施专项食品监测。 展开更多
关键词 木耳 银耳 唐菖蒲伯克霍尔德氏菌 bon基因簇 米酵菌酸 系统发育
暂未订购 下载PDF
基于铁系活性炭的电厂烟气催化脱氧防灭火动力学行为与机制 认领 引用
18
作者 何文浩 邓存宝 郝朝瑜 《煤炭学报》 EI CAS CSCD 北大核心 2026年第5期2900-2909,共10页
将电厂烟气注入煤矿采空区可实现煤矿灾害防治与烟气减排的统一,契合国家新型绿色技术发展主题。然而现场实测大量的烟气氧含量较高,易引发采空区遗煤自燃,亟需研发适合电厂烟气环境的高效经济脱氧理论、技术与装备。通过硝酸铁对煤制... 将电厂烟气注入煤矿采空区可实现煤矿灾害防治与烟气减排的统一,契合国家新型绿色技术发展主题。然而现场实测大量的烟气氧含量较高,易引发采空区遗煤自燃,亟需研发适合电厂烟气环境的高效经济脱氧理论、技术与装备。通过硝酸铁对煤制活性炭进行改性以提高其在烟气氛围下的脱氧性能,利用扫描电镜-能量色散X射线光谱联用(SEM-EDS)、X射线衍射分析(XRD)、氢气程序升温还原(H2-TPR)、傅里叶红外光谱(FTIR)表征了铁系活性炭的结构。在此基础上,采用同步热分析(STA)结合非等温动力学理论,揭示了铁系活性炭在烟气环境中的氧化动力学行为与机制。最终在固定床色谱联用平台验证了铁系活性炭在烟气环境中的催化脱氧性能。结果表明:硝酸铁改性可在活性炭表面形成以Fe3O4为代表的直径约1μm的Fe氧化物团簇,并提高活性炭表面的含氧官能团占比,且含氧官能团占比随着Fe元素质量分数的增加而升高。Fe氧化物负载可降低活性炭的燃点,并提高综合燃烧特性指数。其中,当Fe元素质量分数为9%时,活性炭燃点下降可达21℃,综合燃烧特性指数增加10.6%。此外,Fe系氧化物负载量与活性炭在烟气环境的最大失重速率温度、最大放热温度和燃尽温度均存在线性相关,所有特征温度均随着负载量的提高而下降。动力学分析指出,Fe系氧化物的引入显著降低了活性炭在烟气环境的氧化活化能,最大减少了52.75 kJ/mol,降低幅度接近50%。此外,热力学分析指出,Fe系氧化物的催化作用为降低活性炭氧化过程熵值,进而加速反应中气体的吸附过程。固定床脱氧测试验证了Fe系活性炭的性能优势,在实现尾气中更低O2浓度和更高CO2浓度的同时,不仅降低了活性炭的脱氧反应温度,还使CO释放量最高减少了81.5%。研究可为烟气防灭火技术提供理论指导。 展开更多
关键词 煤自燃 电厂烟气 动力学 催化燃烧 热力学 碳减排
暂未订购 下载PDF
Bone status assessment in Japanese subjects using speed of sound along the tibia 认领 引用 被引量：9
19
作者 Nobuyuki Miyatake Hiroko Muta +2 位作者 Chigusa Murota Mari Haga Masafumi Fujii 《Chinese Medical Journal》 SCIE CAS 2002年第2期94-97,共4页
Abstract Objectives To explore the potential use of ultrasound measurement (SoundScan 2000 Compact, Myriad Ultrasound Systems Ltd., Rehovot, Israel), and to assess both quantitative and qualitative properties of bone.... Abstract Objectives To explore the potential use of ultrasound measurement (SoundScan 2000 Compact, Myriad Ultrasound Systems Ltd., Rehovot, Israel), and to assess both quantitative and qualitative properties of bone. Methods The speed of sound waves (SOS; m/s) propagating along the cortical bone was determined at the tibial shaft. The performance, reliability, validity, and clinical application of this system were evaluated in Japanese subjects. Results In phantom experiments, validity of this system was 0.04(%), coefficient variation (CV: %) in same-day tests was 0.12, in five-separate-day tests was 0.13, and in independent operators was 0.11, respectively. In experiments with Japanese subjects, CV in same-day tests was 0.38, in five-separate-day tests was 0.99, and in independent operators was 0.90, respectively. In addition, cortical bone status of 1176 Japanese subjects (372 males, 804 females) was clinically evaluated by SoundScan 2000 Compact. SOS was negatively correlated with body fat percentage (%), body fat (kg) and waist hip ratio in females and subjects with higher weight bearing index (leg strength/body weight; WBI) have higher SOS in females under the age of forty. Conclusions These findings indicate that the SoundScan 2000 Compact is a highly reliable and valid method for determining cortical bone status and body composition and WBI are closely related to cortical bone status in Japanese females. 展开更多
关键词 Bon status tibia sound Japanese
全文增补中
青藏高原与中亚古文明关系考——以吐火罗故地本土宗教与藏地苯教间的文化交流为切入点 认领 引用
20
作者 加央平措 《西藏大学学报（藏文版）》 CSSCI 2026年第1期33-49,185,186,共17页
文章以藏文苯教文献与佛教教法史文献为经纬,对苯教史料中关于吐火罗地区穆辛血脉世族裔迁居西藏,并弘扬雍仲苯教的相关记述进行了梳理。在此基础上,通过解读敦煌古藏文文献“P.T.1285”中关于小邦时期“辛波”与“苯波”比试医术的苯... 文章以藏文苯教文献与佛教教法史文献为经纬,对苯教史料中关于吐火罗地区穆辛血脉世族裔迁居西藏,并弘扬雍仲苯教的相关记述进行了梳理。在此基础上,通过解读敦煌古藏文文献“P.T.1285”中关于小邦时期“辛波”与“苯波”比试医术的苯教史料,勾勒出吐火罗地区一种“中亚古老宗教”与西藏上古历史时期(包括象雄等诸小邦、悉补野以及吐蕃早期)盛行的苯教文化之间的交流脉络。文章在进一步比对中文相关史料后提出,藏文苯教教法史所载部分苯教大师自吐火罗入藏弘扬雍仲苯教的传说,应是晚期苯教文献对一段历史的回溯性建构,即在多元宗教影响下,于吐火罗、粟特等地形成的中亚古老本土宗教,与西藏苯教之间曾存在深远的文化交流。尽管相关记载的真实性尚待进一步考证,但其内容仍为探究古代吐火罗等中亚地区与西藏早期宗教文化交流提供了珍贵线索。深入挖掘古代吐火罗地区古老宗教与西藏苯教文化的内在联系,不仅有助于还原“苯教”早期历史原貌与宗教本源,也能从学术层面为阐释青藏高原藏族文化在上古人类文明演进中,与周边多民族、多语言、多元文化体系持续交流互动的历史脉络,提供坚实的资料支撑。 展开更多
关键词 吐火罗故地 西藏 中亚本土宗教 辛波 苯教
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 18 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈