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Regulation of the SQUAmOSA PROmOTER-BINDING PROTEIN-LIKE genes/microRNA 156 module by the Homeodomain Proteins PENNYWISE and POUND-FOOLISH in Arabidopsis

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molecular Plant 2011年第6期4卷 1123-1132页

作者： Shruti Lal Leo Bryan Pacis Harley m.S. smith Genetics Genomics and Bioinformatics Graduate Program University of California Riverside CA 92521 USA Center for Plant Cell Biology Institute of Integrative Genome Biology Department of Botany and Plant Sciences University of California Riverside CA 92521 USA

The morphology of inflorescences is regulated in part by the temporal and spatial events that regulate flower specification. In Arabidopsis, an endogenous flowering time pathway mediated by a subset of SQUAmOSA PROmOTER- BINDING PROTEIN-LIKE （SPL） transcription factors, including SPL3, SPL4, and SPL5, function to specify flowers by activating floral meristem identity genes. During shoot development, SPL3, SPL4, and SPL5 are post-transcriptionally regulated by microRNA156 （miR156）. The photoperiod regulated florigenic signal, FLOWERING LOCUS T （FT）, promotes floral induction, in part by activating SPL3, SPL4, and SPL5. In turn, these SPLs function in parallel with FT to specify flower meristems. Two related BELLl-like homeobox genes PENNYWISE （PNY） and POUND-FOOLISH （PNF） expressed in the shoot apical meristem are absolutely required for the specification of floral meristems. Genetic studies show that the floral specification function of FT depends upon PNYand PNF; however, the interplay between these homeodomain proteins and SPLs is not known. In this manuscript, we show that the photoperiodic floral induction of SPL3, SPL4, and SPL5 is dependent upon PNY and PNE Further, PNY and PNF also control SPL3, SPL4, and SPL5 expression by negatively regulating miR156. Lastly, ectopic expres- sion of SPL4 partially rescues the pny pnf non-flower-producing phenotype, while overexpression of SPL3 or SPL5 in pny pnf plants was unable to restore flower specification. These results suggest that：（1） SPL3, SPL4, and SPL5 function is dependent upon PNY and PNF, or （2） expression of multiple SPLs is required for floral specification in pny pnf plants.

关键词： Development meristem homeodomain flowering microRNA.

Landsat 8 and Alos DEm geological mapping reveals the architecture of the giant mesoproterozoic Kunene Complex anorthosite suite(Angola/Namibia)

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Geoscience Frontiers 2023年第5期14卷 308-328页

作者： Jeremie Lehmann Alan m.Brower Trishya m.Owen-smith Grant m.Bybee Ben Hayes Department of Geology University of JohannesburgSouth Africa Jurumani Solutions Midrand 1685South Africa School of Geosciences University of the Witwatersrand2050 JohannesburgSouth Africa

The quasi-monomineralic composition and huge spatial extent of massif-type anorthosites make detecting lithological regions and boundaries *** use processed Landsat 8 OLI multispectral images and ALOS digital elevation models integrated with field and petrographic observations to characterize the architecture of the≥17,000 km2 mesoproterozoic Kunene Complex(KC)anorthosite suite in Angola and *** of false colour composite bands 6,4 and 1 and band ratios 4/2(ferric minerals),6/5(ferrous minerals)and 6/7(OH-bearing minerals),as well as assessment of the PCA and mNF matrices of eigenvectors and eigenvalues from Landsat 8 data using available spectral libraries,have substantially improved the interpretation of the Kunene Complex rock types and *** dataset shows that the reflectance signature of KC anorthositic rocks is primarily a function of the degree of metasomatism,which is most significant in olivine-poor rock *** weathering intensity of the olivine-bearing anorthosite substrate is another control on the remote sensing *** remote sensing and field-based approach has enabled us to divide the KC anorthosite suite into six distinct spectral and architecture domains and at least four distinct magmatic plutons when considering available high-precision geochronological *** northernmost pluton(ca.1380 ma)of massive,olivine-bearing anorthosite shows distinct remote sensing signatures in the band ratio and mNF images marked by the dominance of OH-bearing and subordinate ferric *** central pluton(1412–1400 ma)is composed of NNE-to N-striking steeply dipping interlayered olivine-bearing and olivinepoor anorthosite,which correspond to ridges of dark-coloured,low albedo rocks with subordinate slightly oxidised ferrous mineral spectral signatures,and valleys of low albedo and OH-bearing mineral spectral signatures.A NNE-striking tectonic zone along a linear belt of KC granite gneiss separates the northern and central plu

关键词： Remote sensing Structural geology LANDSAT 8 Alos DEm Lineaments Proterozoic massif-type anorthosite

Evolution of Strigolactone Perception by Seeds of Parasitic Plants： Reinventing the Wheel

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molecular Plant 2016年第4期9卷 493-495页

作者： Xiong, Guosheng Li, Jiayang smith, Steven m. Chinese Acad Agr Sci Agr Genom Inst Shenzhen Shenzhen 518124 Peoples R China Chinese Acad Sci State Key Lab Plant Genom Inst Genet & Dev Biol Beijing 100101 Peoples R China Chinese Acad Sci Natl Ctr Plant Gene Res Beijing Inst Genet & Dev Biol Beijing 100101 Peoples R China Univ Tasmania Sch Biol Sci Hobart Tas 7001 Australia

A BEWITCHING PROCESS The root-parasitic plants of the witchweed family （Orobanchan- ceae） produce seeds that are adapted to germinate in response to strigolactones （SLs） exuded from the roots of their host plants. The resulting colonization of crops such as maize and sorghum by these parasites can cause massive losses in production and to the livelihoods of farmers （Westwood et al., 2010）.

关键词： root-parasitic plants witchweed

Effect of Pressure on Intermediate Valence States in Cerium Kondo Compounds

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Journal of Rare Earths 2004年第1期22卷 7-12页

作者： Oomi G Kagayama T smith J L Lacerda A H Kaji S Ohashi m Department of Physics Kyushu University Ropponmatsu Fukuoka 810-8560 Japan Department of mechanical Engineering and materials Sciences Kumamoto University Kumamoto 860-8555 Japan materials Science and Technology Los Alamos National Laboratory Los Alamos NM 87545 USA

Electrical resistance, thermal expansion, lattice constants of the intermediate valence materials, α-Ce and CeBe 13, were measured at high pressure. It is found that the Grüneisen parameters of Kondo temperature T K are 13 and 42 for α-Ce and CeBe 13, respectively, and it decreases with increasing pressure. The magnetoresistance of α-Ce shows H2 dependence and its coefficient increases with pressure below 1 GPa, but becomes nearly constant above 1 GPa. The results indicate that the intermediate valence states are enhanced at high pressure indicating the enhancement of hybridization between the 4f electron and conduction band.

关键词： condensel physics intermediate valence materials cerium rare earths

Role of granulocyte macrophage colony stimulating factor in regeneration of the central nervous system

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Neural Regeneration Research 2016年第6期11卷 902-903页

作者： Ushananthini Shanmugalingam Nafisa m.Jadavji Patrice D.smith Department of Neuroscience Carleton University

Traditionally,it has been thought that the mammalian central nervous system（CNS）does not *** due to the inhibitory extracellular environment post-injury as well as the limited intrinsic characteristics of adult post... 详细信息

关键词： granulocyte macrophage colony regeneration stimulating intrinsic Figure neuronal subunit glial

Antimicrobial susceptibility testing for Helicobacter pylori in times of increasing antibiotic resistance

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World Journal of Gastroenterology 2014年第29期20卷 9912-9921页

作者： Sinéad m.smith Colm O’morain Deirdre mcNamara Department of Clinical medicine Trinity College DublinTrinity CentreAdelaide and Meath Hospital School of Pharmacy and Pharmaceutical Sciences Trinity College Dublin Department of Gastroenterology Adelaide and Meath Hospital

The gram-negative bacterium Helicobacter pylori(***)causes chronic gastritis,gastric and duodenal ulcers,gastric cancer and mucosa-associated lymphoid tissue *** is recommended in all symptomatic *** current treatment options for *** infection are outlined in this review in light of the recent challenges in eradication success,largely due to the rapid emergence of antibiotic resistant strains of *** resistance is a constantly evolving process and numerous studies have shown that the prevalence of *** antibiotic resistance varies significantly from country to country,and even between regions within the same *** addition,recent data has shown that previous antibiotic use is associated with harbouring antibiotic resistant *** surveillance of antibiotic resistance is warranted to guide clinicians in their choice of *** resistance is assessed by *** culture and antimicrobial susceptibility *** developed molecular tests offer an attractive alternative to culture and allow for the rapid molecular genetic identification of *** and resistance-associated mutations directly from biopsy samples or bacterial culture *** evidence indicates that surveillance of antimicrobial resistance by susceptibility testing is feasible and necessary to inform clinicians in their choice of therapy for management of *** infection.

关键词： Helicobacter pylori Antibiotic resistance Antimicrobial susceptibility testing Polymerase chain reaction molecular test

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美国CSUS混合式教学实践经验的浅析

电气电子教学学报 2018年第2期40卷 92-96页

作者：周静 Lorenzo m.smith Perry Heedley Dennis Dahlquist 侯世英重庆大学电气工程学院重庆400044 Department of Electrical and Electronic Engineering California State University

本文在了解美国混合式教学法的实践及研究现状的基础,提出工程技术类课程开展混合式教学的难点,并重点介绍了美国加州州立大学萨克拉门托分校(CSUS)两门课程开展混合式教学的成功经验。以重庆大学"电工电子学"课程的混合式教学实践为案... 详细信息

本文在了解美国混合式教学法的实践及研究现状的基础,提出工程技术类课程开展混合式教学的难点,并重点介绍了美国加州州立大学萨克拉门托分校(CSUS)两门课程开展混合式教学的成功经验。以重庆大学"电工电子学"课程的混合式教学实践为案例,反思教学过程中存在的问题。通过对比发现,合理的课程构建是影响混合式教学效果的重要因素。

关键词：混合式教学工程技术课程教学方法

利用聚合物多齿配体紧密包覆量子点的高效生物偶联

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利用聚合物多齿配体紧密包覆量子点的高效生物偶联

Effects of single-tree selection harvesting on hymenopteran and saproxylic insect assemblages in the canopy and understory of northern temperate forests

中国化学会第30届学术年会-第三十一分会：胶体与界面化学

作者：屠春来马亮 Andrew m.smith 上海科技大学物质科学与技术学院美国伊利诺伊大学厄巴纳-香槟分校

通过合理设计的配位单体和亲水链单体的活性无规共聚合成的线性聚合物多齿配体,能够利用OH离子剥除量子点表面烷基链配体,再进行配体交换的方法,紧密包覆在具有核壳结构的CdSe/CdZnS量子点表面,制备得到单分散的均相水溶液体系,并且能... 详细信息

通过合理设计的配位单体和亲水链单体的活性无规共聚合成的线性聚合物多齿配体,能够利用OH离子剥除量子点表面烷基链配体,再进行配体交换的方法,紧密包覆在具有核壳结构的CdSe/CdZnS量子点表面,制备得到单分散的均相水溶液体系,并且能够减小量子点的水动力学尺寸,增强量子点的胶体稳定性和提高量子效率。表面功能改性的量子点能够进一步与生物大分子进行高效偶联,可用于生物靶向成像和单分子动态成像。

关键词：聚合物多齿配体粒子表面改性单分散生物偶联生物成像

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Journal of Forestry Research 2012年第2期23卷 275-284页

作者： Sandy m. smith Nurul Islam m. Isabel Bellocq Faculty of Forestry University of Toronto 33 Willcocks St. Toronto Ontario M5S 3B3 Canada Departamento de Ecología Genética y Evolución FCEN Universidad de Buenos Aires CONICET. Ciudad Universitaria Pab 2 Piso 4 Buenos Aires 1426 Argentina

Insects respond to changes in microhabitat caused by canopy disturbance, and thus can be used to examine the ecological impacts of harvesting. Single-tree selection harvesting is the most common silvicultural system used to emulate local small-scale natural disturbance and maintain uneven-aged forest structure in temperate forests. Here, we test for differences in richness, abundance, and composition of hymenopteran and saproxylic insect assemblages at four different taxon levels （selected insect orders; and all hymenopteran families, and braconid subfamilies and morphospecies） between the canopy and understory of unharvested and single-tree selection harvested sites in a northern temperate forest from central Canada. Harvesting had no effect on insect assemblage richness, composition or abundance at the three highest taxon levels （order, family and subfamily）. Similarly, richness and abundance at the lowest-taxon level （braconid morphospecies） were similar, although composition differed slightly between unharvested and harvested stands. Insect assemblages were vertically stratified, with generally higher abundance （for Diptera, Hymenoptera, some hymenopteran families and braconid subfamilies） and richness （for braconid morphospecies） in the understory than the canopy. In particular, composition of the braconid morphospecies assemblage showed relatively low similarity between the understory and canopy. Single-tree selection harvesting appears to influence wood-associated insect taxa only subtly through small changes in community composition at the lowest taxon level, and thus is recommended as a conservative approach for managing these northern temperate forests.

关键词： selection harvesting insect communities canopy insects Jack pine forests forest management high-taxon level insect conserva-tion