检索结果-南通市图书馆

The complete plastome sequences of five Aponogeton species(Aponogetonaceae):Insights into the structural organization and mutational hotspots

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2020年第5期42卷 334-342页

作者： Virginia M.Mwanzia Ding-XuanHe andrew W.Gichira yan Li Boniface k.Ngarega Mwihaki J.karichu Peris W.kamau Zhi-Zhong Li CAS key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan430074China University of Chinese Academy of Sciences Beijing100049China Sino-Africa Joint Research Center Chinese Academy of SciencesWuhan430074China School of Biological and Pharmaceutical Engineering Xinyang Agriculture and Forestry UniversityXinyang464000China The National Museums of kenya NairobiKenya

Members of the aquatic plant genus Aponogeton are widely used commercially in aquariums because of their variable leaf shape and unique ***,due to extensive similarity between species in this genus,morphological characters are generally inadequate for taxonomic ***,molecular makers available for taxonomic and phylogenetic studies of Aponogeton are *** approach to clarifying relationships between species in these complex groups is to use divergence hotspot regions within the ***,we sequenced and analyzed the plastomes of five Aponogeton species collected from China,Zambia,and kenya,and subsequently screened these plastomes for divergent DNA *** five plastomes are circular structures with sizes ranging from 154,167 bp to 154,860 *** Large and the Small Single Copies are separated by two Inverted *** hundred and thirteen unique genes were identified including 79 protein-coding,30 tRNA,and four rRNA *** found that the most abundant repeats in all but one species were mononucleotide repeats(A/T)and that there were 23 potential RNA ending ***,a^3 kb inversion,which includes the accD gene,was detected within the Asian species of *** inversion may be related to more frequent exchanges between this region and the nuclear ***,we detected mutational hotspot sites among the five Aponogeton *** of these hotspots are intergenic spacer regions(accD-psaI,rbcL-accD and trnH-GUG-psbA)that might be suitable for use as barcodes to resolve intra-generic *** also identified four highly variable protein-coding genes(ccsA,rpl22,rps16 and ycf1)may be used as barcodes to resolve the higher-level *** study will provide valuable molecular resources for the taxonomic and phylogenomic study of the complex genus Aponogeton.

关键词： Aponogetonaceae Chloroplast genome Phylogenetic analysis Mutational hotspots

Controversies on Cornell Realism

在线全文

学校读者我要写书评

暂无评论

Fudan Journal of the Humanities and Social Sciences 2023年第2期16卷 191-212页

作者： andrew Tsz Wan Hung Division of Social Sciences Humanities and DesignCollege of Professional and Continuing EducationThe Hong Kong Polytechnic University8 Hung Lok RoadHung HomKowloonHong KongChina

This article examines the criticisms and debates about Cornell *** critics,like Shafer-Landau,Tropman,Oliveira and Perrine,reject the claim by Cornell realism that moral knowledge can be empirically investigated the same as natural science is,I argue that some of their arguments are not sufficient to refute Cornell *** is crucial in assessing Cornell realism is distinguishing normative ethics from empirical *** ethics is normative in nature,that of empirical science is descriptive and predictive.I also show that the debate between Tropman and Long is at cross purposes in their discussion about the nature of moral *** clarifying different meanings of moral knowledge,I argue that while arguments by Cornell realism can be applied to moral psychology,the study of normative ethics through empirical investigation still faces the problem of an is-ought ***,many of Cornell realist arguments are begging many questions.I have also examined recent debates on normativity objection by Parfit and Copp.I argue that Copp’s naturalism is very similar to Huemer’s ***’s argument of non-analytical naturalism seems to support rather than refute moral intuitionism.

关键词： Cornell realism Moral explanation Moral knowledge Metaethics Is-ought problem Normativity objection

A Study on Uptake and Localization of Merocyanine 540 (MC540) in Murine Myeloid Leukemia Cells by Confocal Laser Scanning Microscopy (CLSM)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Lasers 2000年第3期9卷 35-41页

作者： J. y. Chen-1 N. H. Cheung-2 S. C. Chen-2, M. C. fung-3 W. N. Leung-4 N. k. Mak- 4+ ( -1Department of Physics, Fudan University, Shanghai 200433, China -2Department of Physics, Hong kong Baptist University, Hong kong, China -3Department of Bi 复旦大学上海香港浸会大学香港香港大学香港

The intracellular localization of merocyanine 540 (MC540), a photosensitizer commonly used in the photo-inactivation of leukemia cells, was studied using confocal laser scanning microscopy. It was found for the first time that MC540 not only localized in the plasma membrane but also in the cytoplasm and the nuclear membrane of the murine myeloid leukemia M1 and WEHI 3B (JCS) cells. Exposure of MC540 treated leukemia cells to light under conditions that could cause photobleaching did not cause the redistribution of cell-bound MC540. Rapid localization of MC540 in the cytoplasm was observed 5 minutes after exposure of leukemia cell to MC540, indicating that MC540 could promptly be internalized by these two leukemia cell lines. In contrast, localization of MC540 was limited only to the plasma membrane of erythrocytes. These results suggest that the binding pattern of MC540 is cell type dependent and may be related to the efficacy of photosenitization in photodynamic therapy.

关键词： merocyanine 540 Confocal Laser Scanning Microscopy Myeloid Leukemia cell

Timetable Synchronization for Rail Mass Transit

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Timetable Synchronization for Rail Mass Transit

Chlorine‑Rich Substitution Enabled 2D3D Hybrid Perovskites for High Efficiency and Stability in Sn‑Based Fiber‑Shaped Perovskite Solar Cells

中国运筹学会成立三十周年庆祝大会暨2010年全国学术交流年会

作者： Rachel C.W.Wong Janny M.y.Leung Tony W.y.yuen kwok Wah fung Systems Engineering and Engineering Management Department The Chinese University of Hong kong

In public transit systems,passengers would like to interchange between different lines with minimal *** propose a mixed-integer-programming optimisation model for this schedule-synchronisation problem for non-periodic *** model minimises the interchange waiting-times for all passengers by adjusting the trains?run-times,dwell-times,despatch times and headways.A novelty in our formulation is the use of binary variables which enable the correct representation of the waiting-times to the搉ext available?train at the interchange *** also discuss an optimisation-based heuristic for the *** have tested our algorithm for the Mass Transit Railway(MTR) system in Hong kong,which runs six railway lines with many cross-platform interchange *** numerical results indicate that our approach improves the synchronization significantly compared to the current practice of using fixed headways and trip *** explore the trade-offs among different operational parameters and flexibility and their impact on overall passenger *** transit railways are important and growing transportation systems in this world,especially for large metropolitan *** is a need to develop systems to synchronize the schedule of *** quality timetables can conserve time for passengers,generate goodwill,and have other operational ***-support systems that generate good-quality candidate schedules for the consideration of planning engineers substantially reduce the complexity and effort of timetable design and synchronization.

关键词： public transit timetable interchange transportation scheduling

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Advanced Fiber Materials 2023年第1期5卷 296-311页

作者： andrew Balilonda Ziqi Li Chuanyao Luo Xiaoming Tao Wei Chen Research Centre for Smart Wearable Technology School of Fashion and TextilesThe Hong Kong Polytechnic UniversityHung HomHong Kong 999077People’s Republic of China Research Institute for Intelligent Wearable Systems The Hong Kong Polytechnic UniversityHung HomHong Kong 999077People’s Republic of China The Hong kong Polytechnic University Shenzhen Research Institute Shenzhen 518057People’s Republic of China

Despite the impressive power conversion efficiency(PCE)beyond 25.5%,perovskite solar cells,especially the Sn-based variants,are poorly stable under normal operating conditions compared with the market-dominant silicon solar cells that can last for over 25 years.2D3D hybrid perovskite materials are one of the best options to overcome the instability chal-lenge without compromising ***,a record performance of 1 year was reported in Pb-based 2D3D planar per-ovskite ***,the reaction between 2 and 3D perovskite molecules requires high temperatures(-300°C)and increased reaction time(-24 h)to achieve high-quality 2D3D hybrid ***,we base on the ability of chlorine to displace iodine from its ionic compounds in solutions to utilize chloride ions as catalysts for speeding up the reaction between iodine-based 2D and 3D perovskite *** approach reduces the reaction time to-20 min and the reaction temperature to-100°C with the formation of high-quality 2D3D hybrid perovskites,free from pure 2D *** the synthesized 2D3D hybrid perovskite material with 50%chlorine doping in a fiber-shaped solar cell architecture yielded the highest reported PCE of 11.96%in Sn-based fiber-shaped perovskite solar *** unencapsulated and encapsulated fiber-shaped solar cells could maintain 75%and 95.5%of their original PCE,respectively,after 3 months under room light and relative humidity of 35–40%,revealing the champion stability in Sn-based perovskite solar *** solar yarn also demonstrated constant energy output under changing light incident angles(0–180°).

关键词： Fiber-shaped perovskite solar cells 2D3D hybrid perovskites Chlorine doping Tin-based perovskites

A Generalised Score Definition of the Partial Least Squares Algorithm for the Monitoring of Industrial Processes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Generalised Score Definition of the Partial Least Squares ...

第十九届中国控制会议

作者： Uwe kruger andrew y．T．Leung Control Engineering Research Group University of Manchester United kingdom Department of Building and Construction City University of Hong kong

＜正＞In this paper, a new score definition for the partial least squares （PLS） algorithm is introduced. The new scores, termed as generalised scores, provide more effective condition monitoring for applications in ... 详细信息

关键词： Generalised Scores Partial Least Squares Multivariate Statistical Process Control

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

2π干涉学中的多π关联

高能物理与核物理 1993年第1期17卷 49-56页

作者：张卫宁蒋玉桢王山刘亦铭 D. keane J. Jiang y. Shao S. y. fung S. y. Chu 哈尔滨工业大学理论物理教研室哈尔滨150006 Department of Physics Kent State Universitykentohio44242 Department of Physics University of California

多π事件中多π关联对2π干涉学的影响可以用相关π对取样中的多π关联因子和背景中剩余关联因子的比值来表示。在数据分析中这两种关联因子部分抵消,在π源半径较小,事件π多重数较大时,它们在小相对动量区域的差别变大,多π关联对2π... 详细信息

多π事件中多π关联对2π干涉学的影响可以用相关π对取样中的多π关联因子和背景中剩余关联因子的比值来表示。在数据分析中这两种关联因子部分抵消,在π源半径较小,事件π多重数较大时,它们在小相对动量区域的差别变大,多π关联对2π干涉学结果的影响将变得重要。多π关联因子的分布C_(n-2)(q)能够敏感地反映事件中的多π关联效果。对Bevalac流光室2.1AGeVNe+Pb和1.8AGeVAr+Pb实验数据进行的多π关联因子分析表明,前者事件中的多π关联效果大于后者。

关键词：重离子碰撞 π介子多π关联

一种基于SMR主动隔振模型的功率流控制方法

在线全文

学校读者我要写书评

暂无评论

应用力学学报 2002年第3期19卷 153-156页

作者：牛军川宋孔杰 andrew y T Leung 山东大学济南250061 香港城市大学

用功率流指标描述主动隔振系统中能量的传输 ,以传输到接受体的功率流最小为最优化控制目标 ,推导主动隔振系统中功率流传递的最优控制表达式 ,提出了一种基于SMR主动隔振模型的主动功率流的最优化控制策略 ,对比分析了被动和主动模型... 详细信息

用功率流指标描述主动隔振系统中能量的传输 ,以传输到接受体的功率流最小为最优化控制目标 ,推导主动隔振系统中功率流传递的最优控制表达式 ,提出了一种基于SMR主动隔振模型的主动功率流的最优化控制策略 ,对比分析了被动和主动模型下总功率流的传递特性以及主动控制时传递到基础的各功率流分量的分布特性。针对工程实际中的柔性安装问题。

关键词： SMR 主动隔振模型功率流控制方法柔性安装振动噪声控制

Evaluating the physicochemical effects of conjugating peptides into thermogelling hydrogels for regenerative biomaterials applications

在线全文

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2021年第6期8卷 260-272页

作者： Hannah A.Pearce Emily y.Jiang Joseph W.R.Swain Adam M.Navara Jason L.Guo yu Seon kim andrew Woehr Jeffrey D.Hartgerink Antonios G.Mikos Department of Bioengineering Rice University6500 Main StreetHoustonTX 77030USA Depatment of Chemistry Rice University6500 Main StreetHoustonTX 77030USA

Thermogelling hydrogels,such as poly(N-isopropylacrylamide)[P(NiPAAm)],provide tunable constructs leveraged in many regenerative biomaterial ***,our lab developed the crosslinker poly(glycolic acid)-poly(ethylene glycol)-poly(glycolic acid)-di(but-2-yne-1,4-dithiol),which crosslinks P(NiPAAm-co-glycidyl methacrylate)via thiol-epoxy reaction and can be functionalized with azide-terminated peptides via alkyne-azide click *** study’s aim was to evaluate the impact of peptides on the physicochemical properties of the *** physicochemical properties of the hydrogels including the lower critical solution temperature,crosslinking times,swelling,degradation,peptide release and cytocompatibility were *** gels bearing peptides increased equilibrium swelling indicating hydrophilicity of the hydrogel *** sol fractions were found for all groups,indicating that inclusion of peptides does not impact ***,the inclusion of a matrix metalloproteinase-sensitive peptide allowed elucidation of whether release of peptides from the network was driven by hydrolysis or enzymatic *** hydrophilicity of the network determined by the swelling behavior was demonstrated to be the most important factor in dictating hydrogel behavior over *** study demonstrates the importance of characterizing the impact of additives on the physicochemical properties of *** characteristics are key in determining design considerations for future in vitro and in vivo studies for tissue regeneration.

关键词： thermogelling click chemistry hydrogels peptides poly(N-isopropylacrylamide)