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Germination response of desert annuals to shrub facilitation is species specific but not ecotypic

Journal of Plant Ecology 2017年第2期10卷 364-374页

作者： Amanda R.Liczner diego a.sotomayor Alessandro Filazzola Christopher J.Lortie Department of Biology York University4700 Keele St.TorontoOntario M3J1P3Canada Department of Geography York University4700 Keele St.TorontoOntario M3J1P3Canada

Aims Positive plant interactions can promote higher species density of beneficiary species in ***,there is limited evidence examining the trait sets of seeds from beneficiary *** this study,we examined the hypothesis that shrubs(benefactors)influ-ence the germination of desert annuals(beneficiaries)and promote ecotypic differentiation by generating distinct microhabitats through abiotic stress *** following predictions were tested using growth chambers and field-collected seeds:(i)seed mass and viability will be greater and less variable for seeds collected from within shrub understory relative to seeds from open microhabitats,(ii)germination of seeds from shrub and open microhabitats will be greatest under simulated home(source)conditions,(iii)seeds from the shrub microhabitat will adaptively accelerate their germination rate when germinated in simulated home(source)microhabitats relative to their simulated away(reciprocal)*** Seeds and their associated maternal plants were collected from four annual species found within a shrub understory(Larrea triden-tata)and open microhabitats in the Mojave Desert of California(35.30ºN,117.26ºW,793 m.a.s.l.),and then reciprocally germi-nated in growth chambers simulating both microclimatic *** germination and germination rate was measured every 4-5 days for 42 *** Findings There was no significant difference in the mean or coefficient of variation for seed mass and viability between the shrub and open *** source of the seeds did not significantly impact the cumulative germination,and there was no accelerated rate of germination within potential species ecotypes thereby suggesting no ecotypic *** germination was signifi-cantly higher within the shrub-simulated microhabitat for three out of the four species *** germination and germina-tion rate were significantly different between ***,shrubs

关键词： ecotypes facilitation germination seeds viability

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Impacts of the Contributions of FDI and Remittances on the Economic Growth in Asia and Latin America: A Comparative Study

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Frontiers of Economics in China-Selected Publications from Chinese Universities 2019年第3期14卷 371-400页

作者： Leo HChan Maritza.sotomayor Donald Lien Woodbury School of Business Utah Valley UniversityOremUT 84058USA College of Business University of Texas San AntonioSan AntonioTX 78249USA

Foreign direct investment (FDI) and foreign remittance have been the main sources of external capital inflows for many developing *** has been credited as the main driver of rapid economic growth in many Asian countries/regions in recent ***,this effect of FDI on long-run economic growth has not been observed in Latin American ***,the question is whether FDI and an increase in foreign remittances in the past two decades have achieved expected positive results in terms of economic growth for emerging *** study uses a generalized method of moments (GMM) dynamic panel model to quantify the impacts of FDI and foreign remittances as sources of foreign capital for Asia and Latin *** findings suggest that FDI and remittances perform differently in different regions in terms of their impacts on GDP *** that have specific policies (i.e.,industrial policy,domestic content requirement,and export production targets) for FDI are likely to derive more significant benefits from FDI and *** countries that are emerging or lagging should learn from the countries with positive outcomes and implement similar policies.

关键词： foreign direct investment (FDI) Asia China Latin America panel data remittances

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The new Caribbean Nitrogen Index to assess nitrogen dynamics in vegetable production systems in southwestern Puerto Rico

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International Soil and Water Conservation Research 2017年第1期5卷 69-75页

作者： Miguel Oliveras-Berrocales David sotomayor-Ramirez Jorge A.Delgado Luis R.Perez-Alegriad USDA-NRCS Arkansas:2603 Federal Building100 E8th AvePine BluffAR 71601USA University of Puerto Rico Mayaguez CampusCollege of Agricultural SciencesDepartment of Agroenvironmental SciencesPO Box 9000MayagüezPR 00680USA USDA-ARS Acting Research LeaderSoil Management and Sugar Beet Research Unit2150 Centre Ave.Building DSuite 100Fort CollinsCO 80526USA University of Puerto Rico Mayaguez CampusCollege of Agricultural SciencesDepartment of Agricultural and Biosystems EngineeringUSA

Nutrient loss from agricultural fields is one of the main factors influencing surface-and ground-water *** fertilizer nitrogen(N)consumption rates in vegetable production systems and horticultural crops in Puerto Rico fluctuate between 112 and 253 kg N/*** nitrogen use efficiency of vegetable crops is low,increasing the potential for nitrogen losses and high residual soil nitrate *** of residual soil N and N losses to the environment can be a difficult *** models such as the USDA-ARS N Index can be used to identify the relative magnitude of varying N-loss pathways and to identify best management *** studies were conducted to quantify residual soil N and crop N removal,and to validate the Nitrogen Index in onion,tropical pumpkin and tomato production systems in the Lajas Valley in southwestern Puerto *** between observed and simulated values were determined to examine the capability of the model for evaluating N *** was good correlation between observed and predicted values for residual soil N(r=0.88)and crop N removal(r=0.99)(p<0.05).In the production systems evaluated,the N volatilization losses ranged from 1 to 4 kg N/ha,the denitrification losses ranged from 18 to 46 kg N/ha,the leaching losses ranged from 155 to 779 kg N/ha,and the residual soil nitrate ranged from 64 to 401 kg N/*** N use efficiency ranged from 15% to 39%.The results obtained showed that the Nitrogen Index tool can be a useful tool for evaluating N transformations in vegetable production systems of Puerto Rico's semi-arid zone.

关键词： Nitrogen index Nitrogen management Residual soil N Crop N removal

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Influence of Seven Growth Regulators on Fruit Set, Pollen Germination and Pollen Tube Growth of Almonds

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Journal of Agricultural Science and Technology(B) 2012年第9期2卷 1051-1056页

作者： Carlos sotomayor Jorge Castro Nicolas Velasco Roman Toro Pontificia Universidad Catolica de Chile Faculty of Agronomy and Forestry Engineering Santiago Chile

To improve fruit set in ＂Carmel＂ almond （Prunus dulcis） trees grown in the 6th region of Chile, seven different growth regulators （GRs） were sprayed onto flowering branches： gibberellic acid （GA3）, Promalin, naphthaleneacetic acid （NAA）, Thidiazuron, Kinetin, Point-tomatomone and Brassinolide. The percentage of fruit set was determined by comparing the initial number of flowers present on each treated branch with the total number of almonds on the branches 50 days after anthesis. In comparison to the controls, Brassinolide, Point-tomatomone and Promalin achieved increases in fruit set of 19.4%, 14.5% and 12.9%, respectively. A parallel experiment was done in vitro, on the effects of these GRs on pollen germination and pollen tube growth. The greatest pollen germination （4 hours at 20 ~C） occurred with Brassinolide and GA3, which were significantly higher than the control, while NAA and Promalin significantly reduced germination. For pollen tube growth （24 hours at 20 ~C）, the greatest lengths were observed with Point-tomatomone and Brassinolide, which were significantly longer than the control, while NAA, Thidiazuron and Promalin were significantly shorter than the control, and the least growth was observed with Kinetin.

关键词： Almond growth regulators pollination fruit set.

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Biodiversity-friendly Agricultural Practices in the Indigenous Agricultural Systems in the Biodiversity Corridor of the Alto Paraná Atlantic Forest (Paraguay)

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Research in Ecology 2021年第3期3卷 1-7页

作者： Federico Vargas Lehner Ruth Tiffer-sotomayor Alejandrino Díaz Alberto Yanosky Faculty of Agricultural Sciences Universidad Nacional de AsunciónParaguay Environment Natural Resources&Blue EconomyWorld BankWashingtonD.C.United States ItaipúBinacional AsunciónParaguay Guyra Paraguay/CONACYT Carlos BovedaViñas CueAsunciónParaguay

Agricultural systems result of the coevolution between social and natural systems,where biodiversity and natural resources play an important role,emerging interactions between crops and the natural environment that allow the development of ecological processes which interact with external *** research aims to describe the agricultural practices developed by the Guarani Indigenous people in the agricultural systems located within the biodiversity corridor of the Upper Parana Atlantic *** exploratory study is focused on multiple cases,with a qualitative approach and from data collected during 2017 and 2018 in eleven indigenous *** main practices developed for the management of biodiversity are polyculture,rotation,and embroideries;they also practice agroforestry and *** main difficulty they face is the reduction of the surrounding biodiversity,which affects the sustainability of the *** study shows ways for nature-based solutions and ecosystem-based adaptation according to current needs for greening the economy.

关键词： Indigenous agriculture Agrobiodiversity Slash-and-burn Nature based solutions Ecosystem based adaptation

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Non Local Corrections to the Electronic Structure of Non Ideal Electron Gases: The Case of Graphene and Tyrosine

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Journal of Modern Physics 2013年第4期4卷 522-527页

作者： Yamila García John Cuffe Francesc Alzina Clivia M. sotomayor-Torres Catalan Institute of Nanotechnology (CIN2-CSIC) Campus UAB Bellaterra Spain

We introduce a formal definition of a non local functional and show that the non local exchange-correlation potential functional, derived within Density-Functional Theory, is non local in the space of electronic densities. A previously developed non local exchange-correlation potential term, is introduced to approach the exact density-functional potential. With this approach, the electronic structure of the graphene surface and the tyrosine amino acid are calculated.

关键词： Nonlocality Interfaces Exchange-Correlation Potential Graphene

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Influence of Fungicides on Almond Pollen Germination and Fruit Set

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Journal of Agricultural Science and Technology(B) 2011年第3期1卷 444-447页

作者： C. sotomayor J. Castro M. J. Riera Pontifieia Universidad Catolica de Chile Faculty of Agronomy and Forestry Engineering Santiago Chile

The almond （Prunus dulcis） is a self-incompatible species that requires various orchard management techniques to encourage pollination and achieve a good fruit set. Fungicides are commonly applied to almond flowers to control fungaI infections, such as ＂blossom blight＂ and ＇brown rot＂ that damage the flowers and developing fruits. However there is evidence that the application of some of these products may adversely affect pollination and fruit set. The effects of the fungicides captan, chlorothalonyl, propiconazole, mancozeb and dichloran on fruit set were studied in an orchard using ＂Nonpareil＂ and ＂Carmel＂ almond trees. The effects on in vitro pollen germination and pollen tube elongation were studied using ＂Carmel＂ pollen. With respect to Non Pareil fruit set, all fungicidal treatments were statistically similar to the control （11.5%） but being propiconazole （13.1%） and chlorotalonil （5.6%） different between them. Fruit set for ＂Carmel＂ was significantly lower than the control （26.1%） with all fungicidal treatments. After 24 hours, in vitro ＂Carmel＂ pollen germination was significantly higher in the control （90.5%） compared with the fungicidal treatments, with the exception of chlorothalonyl （70.2%）. Pollen tube growth in the control was four times greater than in the fungicide treatments at 24 hours, none of which were significantly different from the other treatments. It can be concluded that the application of certain fungicides has a clearly detrimental effect on fruit set in ＂Nonpareil＂ and ＂Carmel＂ almond trees and on ＂Carmel＂ pollen activity.

关键词： Almonds fungicides pollen tube pollen germination fruit set.

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依布替尼通过新型途径克服弥漫大B细胞淋巴瘤细胞耐药机制的研究

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中华血液学杂志 2017年第12期38卷 1036-1042页

作者：吴凌张翼鷟夏冰李晓武袁田田晨赵海丰于泳 E.sotomayor 天津医科大学肿瘤医院国家肿瘤临床医学研究中心天津市肿瘤防治重点实验室天津市恶性肿瘤临床医学研究中心300060 George Washington Cancer Center Washington DC United States

目的探讨依布替尼克服弥漫大B细胞淋巴瘤（DLBCL）细胞耐药的机制。方法①体外实验：以DLBCL细胞系SUDHL10细胞（GCB亚型）、HBL-1（ABC亚型）以及8例DLBCL患者原代细胞为研究对象，与正常人骨髓基质细胞（MSC）共培养后，显微镜下计数... 详细信息

目的探讨依布替尼克服弥漫大B细胞淋巴瘤（DLBCL）细胞耐药的机制。方法①体外实验：以DLBCL细胞系SUDHL10细胞（GCB亚型）、HBL-1（ABC亚型）以及8例DLBCL患者原代细胞为研究对象，与正常人骨髓基质细胞（MSC）共培养后，显微镜下计数向MSC趋化迁移及与MSC黏附的DLBCL细胞数，ELISA法检测MSC的CXCL12表达水平，流式细胞术检测DLBCL细胞的CXCR4表达水平；以携带有CXCR4的慢病毒转染HBL-1细胞，米托蒽醌、依布替尼处理后与MSC共培养，流式细胞术检测细胞凋亡水平；倒置显微镜下观察HBL．1细胞集落形成情况。②体内实验：以HBL．1细胞构建的NOD／SCID肿瘤模型小鼠为研究对象，观察依布替尼治疗后肿瘤体积变化。结果①依布替尼处理后，DLBCL细胞向MSC的迁移数和与MSC的黏附比例明显降低（P值均〈0．05），并呈剂量依赖性。②与依布替尼处理前比较，处理后MSC的CXCL12表达水平降低（SUDHL10细胞：660pg／ml对1400pg／ml，P=0．004；HBL-1细胞：720pg／ml对1490pg／ml，P=0．018；DLBCL原代细胞：850pg／ml对1450pg／ml，P=0．004），DLBCL细胞的CXCR4表达水平降低（P值均〈0，05）。③共培养时，对照组、米托蒽醌组、依布替尼组、米托蒽醌组＋依布替尼组的HBL．1细胞凋亡比例分别为15．1％、17．5％、23．5％、58．7％，转染过表达CXCR4后，HBL．1细胞凋亡比例分别为14．2％、16．1％、22．5％、38．3％，共培养联合用药组HBL．1细胞凋亡比例高于单药培养组，差异均有统计学意义（P值均〈0．05）。④对照组、MSC组、依布替尼组、MSC组＋依布替尼组集落数分别为113±5、205±4、62±9、123±3（每孔2．5×10^3），模型小鼠皮下肿瘤体积分别为6500、17000、4000、10000mm^3，依布替尼处理后较处理前集落数和肿瘤体积明显减少，差异均有统计学意义）P值均〈0．05）。结论依布替尼靶向作用于CXCL12／CXCR4轴，抑制CXCR4表达从而克服MSC介导的耐药作用，并且能够在体内外抑制MSC促淋巴瘤细胞集落形成的作用。为依布替尼治疗复发耐药DLBCL提供了理论依据。

关键词：淋巴瘤大B细胞弥漫性趋化因子CXCL12 受体 CXCR4 依布替尼

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Method to Improve Airborne Pollution Forecasting by Using Ant Colony Optimization and Neuro-Fuzzy Algorithms

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International Journal of Intelligence Science 2014年第4期4卷 81-90页

作者： Elizabeth Martinez-Zeron Marco A. Aceves-Fernandez Efren Gorrostieta-Hurtado Artemio sotomayor-Olmedo Juan Manuel Ramos-Arreguín Facultad de Informática Universidad Autónoma de Querétaro Querétaro México Laboratory of Artificial Intelligence Faculty of Engineering Universidad Autónoma de Querétaro Querétaro México

This contribution shows the feasibility of improving the modeling of the non-linear behavior of airborne pollution in large cities. In previous works, models have been constructed using many machine learning algorithms. However, many of them do not work for all the pollutants, or are not consistent or robust for all cities. In this paper, an improved algorithm is proposed using Ant Colony Optimization (ACO) employing models created by a neuro-fuzzy system. This method results in a reduction of prediction error, which results in a more reliable prediction models obtained.

关键词： Neuro-Fuzzy models Ant Colony Optimization Airborne Pollution

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用数控随机试验系统作脱机数据分析和处理

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导弹与航天运载技术(中英文) 1979年第9期 84-103页

作者： C·P·Chapman B·R·sotomayor 李伟

本文讨论利用新型计算机控制的随机环境控制系统作快速和有效的大规模数据分析时所具有的优点,而不是用作试验控制时的优点。提出对硬件和软件的要求。根据傅立叶系数确定几种较熟习的频率函数。这些控制系统利用了傅立叶处理机的主要... 详细信息

本文讨论利用新型计算机控制的随机环境控制系统作快速和有效的大规模数据分析时所具有的优点,而不是用作试验控制时的优点。提出对硬件和软件的要求。根据傅立叶系数确定几种较熟习的频率函数。这些控制系统利用了傅立叶处理机的主要成果。确定了另一种函数(概率密度函数)并提出了应用建议。文中列举有分析实例和部分程序表,讨论了频率分析精度和可靠性。

关键词：函数互谱傅立叶系数方程置信区间置信度置信距置信水平数据分析数据处理处理机随机试验概率试验

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