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A SURVEY OF SIZES AND WEIGHTS OF BEMISIA TABACI（HOMOPTERA： ALEYRODIDAE）B BIOTYPE LIFE STAGES FROM FIELD GROWN COTTON AND CANTALOUPES

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Entomologia Sinica 2003年第2期10卷 121-130页

作者： Chang-chiChu jamess.buckner KamilKarut ThomasP.Freeman DennisR.Nelson ThomasJ.Henneberryl USDA ARSWestern Cotton Research Laboratory4135E.Broadway RoadPhoenixAZ85040 USA USDA ARSBiosciences Research LaboratoryFargoND58105 USA Cukurova University Agricultural FacultyDepartnrent of Plant Protection01330AdanaTurkey Electron Microscopy Center North Dakota State UniversityND58105 USA

Size and weight measurements were made for all the life stages of Bemisia tabaci (Gennadius) B biotype from field grown cotton ( Gossypium hirsutum L. ) and cantaloupe ( Cucumis melo L., var. cantalupensis )in Phoenix, AZ and Fargo, ND, USA in 2000 and 2001. Nymphal volumes were derived from the *** average nymphal volume increase for settled 1 st to the late 4th instar was exponential. The greatest increase in body volume occurred during development from the 3rd to early 4th instar. Nymphs on cotton leaves were wider,but not longer compared with those on cantaloupe. Ventral and dorsal depth ratios of nymphal bodies from 1st tolate 4th instars from cantaloupe leaves were significantly greater compared with those from cotton leaves. During nymphal development from 1st to 4th instar, the average (from the two host species) ventral body half volume in-creased by nearly 51 times compared with an increase of 28 times for the dorsal body half volume. Adult female and male average lengths, from heads to wing tips, were 1 126 μm and 953 μm, respectively. Average adult fe-male and male weights were 39 and 17 μg, respectively. Average widths, lengths, and weights of eggs from cottonand cantaloupe were, 99 μm, 197 μm, and 0.8 μg, respectively. Average widths, lengths, and weights for exu-viae of non-parasitized nymphs from both cotton and cantaloupe were 492 μm, 673 μm, and 1.20 μg, respective-ly; and widths, lengths, and weights of parasitized nymph exuviae were 452 μm, 665 μm, and 3.62 μg, respec-tively. Both exuviae from non-parasitized and parasitized nymphs from cotton leaves were wider, longer, and heavier than those from cantaloupe leaves.

关键词： Bemisia tabaci B biotype Bemisia argentifolii body size body weight body volume parasitized exuviae

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Camouflage Patterning in Maize Leaves Results from a Defect in Porphobilinogen Deaminase

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Molecular Plant 2009年第4期2卷 773-789页

作者： Mingshu Huanga Thomas L. Slewinski R. Frank Baker , Diane Janick-buckner Brent buckner Gurmukh S. Johal David M. Braun Department of Biology Pennsylvania State University University Park PA 16802 Division of Science Truman State University Kirksville MO 63501 Department of Botany and Plant Pathology Purdue University West Lafayette IN 47907

Maize leaves are produced from polarized cell divisions that result in clonal cell lineages arrayed along the long axis of the leaf. We utilized this stereotypical division pattern to identify a collection of mutants that form chloroplast pigmentation sectors that violate the clonal cell lineages. Here, we describe the camouflage1 （cfl） mutant, which develops nonclonal, yellow-green sectors in its leaves. We cloned the cfl gene by transposon tagging and determined that it encodes porphobilinogen deaminase （PBGD）, an enzyme that functions early in chlorophyll and heme biosynthesis. While PBGD has been characterized biochemically, no viable mutations in this gene have been reported in plants. To investigate the in vivo function of PBGD, we characterized the cfl mutant. Histological analyses revealed that cfl yellow sectors display the novel phenotype of bundle sheath cell-specific death. Light-shift experiments determined that constant light suppressed cfl sector formation, a dark/light transition is required to induce yellow sectors, and that sectors form only during a limited time of leaf development. Biochemical experiments determined that of 1 mutant leaves have decreased PBGD activity and increased levels of the enzyme substrate in both green and yellow regions. Furthermore, the cfl yellow regions displayed a reduction in catalase activity. A threshold model is hypothesized to explain the cfl variegation and incorporates photosynthetic cell differentiation, reactive oxygen species scavenging, and PBGD function.

关键词： camouflage1 maize porphobilinogen deaminase tetrapyrrole biosynthesis variegated leaf.

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Bemisia tabaci （Hemiptera： Aleyrodidae） nymphal feeding in cotton （Gossypium hirsutum） leaves

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Insect Science 2007年第5期14卷 375-381页

作者： CHANG-CHI CHU DENNIS A. MARGOSAN JAMES S. buckner THOMAS P. FREEMAN THOMAS J. HENNEBERRY USDA ARS US Arid Land Agricultural Research Center Maricopa Arizona USDA ARS San Joaquin Valley Agricultural Science Center Parlier California Biosciences Research Laboratory Fargo North Dakota Electron Microscopy Center North Dakota State University Fargo North Dakota USA

We used brightfield electron microscopy （BEM）, differential interference contrast microscopy （DICM）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, and confocal laser scanning microscopy （CLSM） to investigate the stylet pathways of Bemisia tabaci during nymphal feeding behavior in cotton leaves beginning with penetration of the abaxial leaf surface and ending with stylets in sieve tubes in phloem tissues. Most nymphal stylets within salivary sheaths penetrating leaf tissues made complex turns and developed more than one salivary sheath branch before ending in sieve tubes. The external morphology of the salivary sheaths and their routes between and through leaf cells are described during the present study. Results showed the presence of the stylet within the sieve tubes. B. tabaci nymphs may remove stylets and feed in different sieve tubes. Ten short movies showing the progression of the stylet penetrations from adaxial surface to the sieve tubes are attached to Figures 8-15. The report and movies can be viewed from the internet. Download the movies to a local drive in your computer first for fast upload. The movies are posted on the website http：//***/Services/***？docid=14629. The movies can be used as a teaching aid in biology classes.

关键词： Bemisia tabaci microscopy nymphs feeding stylet sheath stylet

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Keratoconus in a patient with Alport syndrome: A case report

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World Journal of Clinical Cases 2019年第19期7卷 3012-3017页

作者： Majid Moshirfar David F Skanchy Aaron T Gomez Yasmyne C Ronquillo Benjamin buckner Phillip C Hoopes John A.Moran Eye Center Department of Ophthalmology and Visual SciencesUniversity of Utah School of MedicineSalt Lake CityUT 84101United States Utah Lions Eye Bank Salt Lake CityUT 84101United States Hoopes Durrie Rivera Research Center Hoopes VisionDraperUT 84020United States Kellogg Eye Center Department of OphthalmologyUniversity of Michigan Medical SchoolAnn ArborMI 48103United States The University of Texas Rio Grande Valley School of Medicine EdinburgTX 78542United States

BACKGROUND Known ocular manifestations of Alport syndrome include features such as anterior lenticonus and fleck retinopathy. Reports of keratoconus in such patients are limited. We report tomographic findings consistent with keratoconus in a patient with Alport *** SUMMARY A 52-year-old female was referred to our ophthalmology clinic with decreased vision and increased tearing. She was diagnosed with stage Ⅲ Alport syndrome two years prior. Upon examination she was found to have average keratometries of 48D bilaterally with tomographic evidence of *** Although a rare presentation, concurrent Alport syndrome and keratoconus should be considered when reviewing the ocular health of Alport syndrome patients and appropriate management steps should be taken upon the diagnosis.

关键词： Alport syndrome,Keratoconus Type Ⅳ collagen COL4A genes Corneal ectasia Case report

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Time Travel in the Brain

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科技英语学习 2007年第5期 11-12页

作者： Daniel Gilbert Randy buckner 刘杰

当你什么都不做时你究竟在做什么?如果回答是“什么也没做”,从逻辑上看似乎是对的;但如果是一个涉及神经科学的题,那答案是错的。科学家经过大量的大脑扫描实验发现:当人在进行脑力活动时,大脑中主宰该活动的区域(相对较亮的区域)会变... 详细信息

当你什么都不做时你究竟在做什么?如果回答是“什么也没做”,从逻辑上看似乎是对的;但如果是一个涉及神经科学的题,那答案是错的。科学家经过大量的大脑扫描实验发现:当人在进行脑力活动时,大脑中主宰该活动的区域(相对较亮的区域)会变大。最新的研究表明,当大脑的一些区域变亮时其他的区域则变暗。当我们好像在做什么事的时候,这些变暗的区域处于休眠状态,而当我们好像什么也没做时,这些区域则相当活跃。那么,我们究竟在做什么呢?答案是“时间旅行”。

关键词： Time Travel in the Brain

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CIS-Based Mapping and Zonation of Landslide Hazards in Xiaojiang Valley of Southwestern China

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Wuhan University Journal of Natural Sciences 2003年第3B期8卷 1021-1028页

作者： MaZe-zhong HeYi-ping XieHong CuiPeng ZhongDun-lun jamess.Gardner InstituteofMountainHazardsandEnwronment ChineseAcademyofSciencesChengdu610041SichuanChina DepartmentofGeographyandNaturalResourcesInstitute UniversityofManitobaWinnipegMb.Canada

Through the field survey, previous researches and interpretation of aerial photos, a landslide information database of Xiaojiang Valley, Yunnan Province was set up based on the remote sensing (RS) and geographic information system (GIS) technologies. In the paper, a quantitative model for the landslide hazard assessment and zoning was presented, in which the potential energy could be obtained on basis of thorough analysis of the potential sliding volume, distance and direction of the landslide body. Taking landslide potential energy as the index of the hazard severity zonation, the study area was divided into severe, heavy, medium and light hazard zones.

关键词： landslide hazard mapping zonation Xiao- jiang Valley southwestern China

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Synthesis of NaX (X = F, Cl, Br, I) Nanoparticles

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Soft Nanoscience Letters 2013年第1期3卷 22-27页

作者： Elseddik Abdelkader Steven W. buckner Department of Chemistry Saint Louis University St. Louis USA

We report here on the synthesis of nanoparticles (NPs) of sodium halide (NaX;X = F, Cl, Br, I) salts using reverse micelles (water/dioctylsodiumsulfosuccinate/toluene) with the resulting NPs having diameters of 1.5 to 2.5 nm. The initial core of reverse micelle contains a water-soluble salt. After evaporation of the volatile compounds under vacuum (water and toluene), NaX NPs are produced with an AOT surfactant cap. The NaX NPs redisperse in toluene. In contrast to previous syntheses of soluble salt NPs, Na+ ions from the surfactant are found to completely exchange with the salt in the initial core of the reverse micelles. The resulting NPs were analyzed with dynamic light scattering (DLS), transmission electron microscopy (TEM), and selected area electron diffraction (SAED) which confirmed the exchange mechanism. Experimental results are compared and found to be in agreement with the recently published model by Bandopadhyaya and coworkers.

关键词： Alkali Halides Nanoparticles Reverse Micelles Modeling Synthesis

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营养观念的变迁

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中华医学杂志 1935年第1期21卷 75-78页

作者： jamess.McLester 涛声

曩苦医生调养病人,常禁其用某种饮食,晚近医生则劝病人必需多取某种饮食。这营养观念的改变在临床医学方面获益颇深;其促进临床医学的发展,实有划分时代的功绩。

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Exposure and Metabolism of Heterocyclic Amine Food Mutagens/Carcinogens in Humans

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癌变．畸变．突变 2001年第4期13卷 215-216页

作者： jamess.Felton KristenS.Kulp CynthiaP.Salmon MichaelA.Malfatti MarkG.Knize MolecularandStructuralBiologyDivision L-452LawrenceLivermoreNationalLaboratoryLivermore

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ASCI——一个重大的科学计算工程

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国外核武器研究 2004年第3期 116-125页

作者： jamess．Peeru 袁国兴王双虎

可以设想，在常规检查时，我们打开一个武器系统，发现一个重要的变化，而这种变化并不是我们希望的；或设想有许多原因可能导致武器置身火中。这些情况的确可能发生。武器还能按预想的那样工作吗?武器在几乎反常的条件下安全吗?洛斯·... 详细信息

可以设想，在常规检查时，我们打开一个武器系统，发现一个重要的变化，而这种变化并不是我们希望的；或设想有许多原因可能导致武器置身火中。这些情况的确可能发生。武器还能按预想的那样工作吗?武器在几乎反常的条件下安全吗?洛斯·阿拉莫斯的先进模拟和计算计划给武器设计者提供世界上最强大计算机上的高逼真模拟能力将有助于回答这些问题。

关键词：核武器系统科学计算工程加速战略计算计划核武器库维护

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