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Low temperature,IBA concentrations and optimal time for adventitious rooting of Eucalyptus benthamii mini-cuttings

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Journal of Forestry Research 2012年第4期23卷 583-592页

作者： Gilvano Ebling Brondani francisco JoséBenedini Baccarin Heron Wilhelmus de Wit Ondas JoséLuiz Stape Antonio Natal Gonçalves Marcilio de Almeida Department of Forest Engineering Federal University of Mato Grosso(UFMT)Avenida Fernando Corrêa da Costa2367ZC 78060-900CuiabáMato GrossoBrazil. Department of Forest Sciences "Luiz de Queiroz"College of AgricultureUniversity of S o Paulo(ESALQ/USP)Avenida Pádua Dias11POB 9ZC 13418-900PiracicabaSo PauloBrazil. Department of Biological Sciences "Luiz de Queiroz"College of AgricultureUniversity of S o Paulo(ESALQ/USP)Avenida Pádua Dias11POB 9ZC 13418-900PiracicabaSo PauloBrazil. Department of Forest and Environmental Sciences North Carolina State UniversityNC 27695USA.

Eucalyptus benthamii is a forest species of economic interest that has difficulty with seed production and also is considered to have difficulty with adventitious rooting using propagation techniques, such as cutting or mini-cutting. We aimed to assess the adventitious rooting percentage under different storage times in low temperatures and at various IBA （indole-3-butyric acid） concentrations to determine the optimal time of permanence for rooting Eucalyptus benthamii minicuttings in a greenhouse. Shoots collected from mini-stumps cultivated in a semi-hydroponic system were used to obtain the mini-cuttings. For the first experiment, the mini-cuttings were stored at 4℃ for 0 （immediate planting）, 24, 48, 72, 96 and 120 h. The second experiment evaluated the rooting dynamic to determine the optimal time of permanence for minicuttings in a greenhouse. The basal region of the mini-cutting was treated with various IBA solutions： 0 （free of IBA）, 1,000, 2,000, 3,000 and 4,000 mg.L^-1. Every seven days （0 （immediate planting）, 7, 14, 21 and 28 days）, destructive sampling of the mini-cuttings was performed to evaluate the histology of the adventitious rooting. Eucalyptus benthamii minicuttings should be rooted immediately after the collection of the shoots. The 2,000 mg.L^-1 IBA concentration induced a greater speed and percentage of adventitious rooting, and an interval of 35 to 42 days was indicated for permanence of the mini-cuttings in the greenhouse. Expo- sure to low temperature induced adventitious root formation with diffuse vascular connections.

关键词： rhizogenesis plant cloning mini-cutting technique histological analysis indole-3-butyric acid.

Hydrolysis of Urea to Produce Ammonia Dircio francisco Xavier Fatima Ximenes

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Hydrolysis of Urea to Produce Ammonia Dircio Francisco Xavie...

作者： Dircio francisco Xavier Fatima Ximenes（弗朗西斯科）华东理工大学

学位级别：硕士

氮氧化物（NOx）引起了巨大的环境问题,是目前世界上最大的环境污染物之一,随着对NOx法规的逐步收紧,世界各国都在积极开展减少NOx污染的研究。目前已开发利用了多种技术,其中选择性催化还原（SCR）和选择性非催化还原（SNCR）具有较高... 详细信息

氮氧化物（NOx）引起了巨大的环境问题,是目前世界上最大的环境污染物之一,随着对NOx法规的逐步收紧,世界各国都在积极开展减少NOx污染的研究。目前已开发利用了多种技术,其中选择性催化还原（SCR）和选择性非催化还原（SNCR）具有较高的脱硝效率。在SCR和SNCR工艺中,还原剂被注入烟气中,将NOx还原为无害氮（N2）。目前最常用的还原剂是氨（NH3）。尿素催化水解制氨在氨基脱氮过程中起着重要作用。本论文的目标有三个。首先,对尿素水解的催化剂进行筛选,其中均相催化剂表现出了良好的性能,因此本文用选择该类催化剂来进行尿素催化水解反应,然后尿素水解的转化率采用滴定法来进行分析。第二是设计了四因素,三水平Box-Behnken实验,结合响应面法对工艺条件进行优化,研究反应温度,反应时间,反应压力和催化剂用量对尿素水解制氨的影响及其交互作用。建立了尿素水解率的相关模型。第三是采用物料平衡方程,热量平衡方程,化学平衡方程及相平衡方程组成的非线性方程组来构建开口体系内尿素水解过程的热力学模型和动力学模型,并引入修正的Lewis-Randall方程和修正的Herry方程来描述水解反应器内NH3-CO2-H2O-（NH2）2CO（ACWU）四元多自由度气液平衡关系,气液两相的非理想性则分解采用PR状态方程和扩展UNIQUAC模型进行修正。结果表明,采用催化活性较好的乙酸钠（7g）催化剂对工艺条件进行优化,响应面法最优化的合成条件为;反应温度160℃,反应时间4h,反应压力0.4MPa和催化剂用量0.034wt%,在此工艺条件下尿素水解的转化率为98.620%,同时建立了尿素水解制氨的二次数学模型,该模型对实验结果有良好的预测作用。

关键词：尿素水解制氨热力学动力学

Impact of ZnSO_(4)^(-)and ZnO Nanoparticles on Seed Germination and Seedling Growth of Lettuce

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Phyton-International Journal of Experimental Botany 2023年第6期92卷 1831-1840页

作者： Adalberto Benavides-Mendoza Rebeca Betancourt-Galindo Nazario francisco-francisco Departamento de Horticultura Universidad Autónoma Agraria Antonio NarroSaltillo25315México Departamento de Materiales Avanzados Centro de Investigación en Química AplicadaSaltillo25294México Departamento de Agricultura Sustentable y Protegida Universidad Tecnológica de TehuacánTehuacán75859México

Micronutrient nanoparticles(NPs)are currently an option for chemical fertilization and biostimulation in ***,there is little information on the phytotoxic or biostimulatory effects of NPs at low concentrations of some elements,such as *** this study,the effect of low concentrations of Zn oxide(ZnO)NPs on germination,growth variables,and nutritional attributes of lettuce(Lactuca sativa L.)was evaluated in comparison to Zn *** lettuce seeds were treated with ZnSO_(4)^(-)×7H_(2)O and ZnO NPs at Zn molar concentrations of 1×10^(−3),5×10^(−3),1×10^(−4),5×10^(−4),1×10^(−5),5×10^(−5),1×10^(−6),and 5×10^(−6).The seeds treated with ZnSO4−at 5×10^(−6)registered the highest radicle length,73%more than the control *** seeds treated with ZnSO4−at 5×10^(−3)registered the lowest values,with 50%less than the control *** NPs at 5×10^(−6)significantly increased content of chlorophyll A and B and total *** results indicate the possible existence of a mechanism related to the intrinsic nanoparticle properties,especially at low concentrations.

关键词： Micronutrients biostimulation nanotechnology nanofertilizers germination chlorophyll total phenols

The quest for selective Cs^(+) transport in plants

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Molecular Plant 2021年第4期14卷 552-554页

作者： Manuel Nieves-Cordones francisco Rubio Departamento de Nutricion Vegetal Centro de Edafologia y Biologia Aplicada del Segura-CSICCampus de Espinardo30100 MurciaSpain

Nuclear accidents have led to the release to the environment of radioactive isotopes,mainly radioactive cesium(Cs^(+)),contaminating large areas of soil for very long periods of time(Burger and Lichtscheidl,2018).These contaminated soils contain^(134)Cs^(+)and^(137)Cs^(+)radioisotopes that are readily accumulated into plants and that,through the food chain,are transferred to animals and humans,causing important health problems(Burger and Lichtscheidl,2018).

关键词： readily release transport

SPLITTING SCHEMES FOR A NAVIER-STOKES-CAHN-HILLIARD MODEL FOR TWO FLUIDS WITH DIFFERENT DENSITIES

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Journal of Computational Mathematics 2014年第6期32卷 643-664页

作者： francisco Guillen-Gonzalez Giordano Tierra Departamento de Ecuaciones Diferenciales y Andlisis Numgrico and IMUS Universidad de Sevilla 41012 Seville Spain Department of Applied and Computational Mathematics and Statistics University of Notre Dame Notre Dame IN 46556 USA

In this work, we focus on designing efficient numerical schemes to approximate a ther- modynamically consistent Navier-Stokes/Cahn-Hilliard problem given in [3] modeling the mixture of two incompressible fluids with different densities. The model is based on a diffuse-interface phase-field approach that is able to describe topological transitions like droplet coalescense or droplet break-up in a natural way. We present a splitting scheme, decoupling computations of the Navier-Stokes part from the Cahn-Hilliard one, which is unconditionally energy-stable up to the choice of the potential approximation. Some nu- merical experiments are carried out to validate the correctness and the accuracy of the scheme, and to study the sensitivity of the scheme with respect to different physical pa- rameters.

关键词： Two-phase flow Diffuse-interface phase-field Cahn-Hilliard Navier-Stokes,Energy stability Variable density Mixed finite element Splitting scheme.

Increasing Powers in a Degenerate Parabolic Logistic Equation

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Chinese Annals of Mathematics,Series B 2013年第2期34卷 277-294页

作者： Jos francisco RODRIGUES Hugo TAVARES Department of Mathematics and CMAF Universidade de LisboaAvenida Professor Gama Pinto 21649-003 LisboaPortugal

The purpose of this paper is to study the asymptotic behavior of the positive solutions of the problem tu- △u=au-b（x）up in Ω×R＋,u（0）=u0,u（t ）｜ Ω=0, as p→ ＋∞, where Ω is a bounded domain, and b（x） is a nonnegative function. The authors deduce that the limiting configuration solves a parabolic obstacle problem, and afterwards fully describe its long time behavior.

关键词： Parabolic logistic equation Obstacle problem Positive solution Increasing power Subsolution and supersolution

Shear velocity criterion for incipient motion of sediment

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Water Science and Engineering 2014年第2期7卷 183-193页

作者： francisco J.M.SIMOES U.S. Geological Survey Geomorphology and Sediment Transport LaboratoryGolden CO 80403 USA

The prediction of incipient motion has had great importance to the theory of sediment transport. The most commonly used methods are based on the concept of critical shear stress and employ an approach similar, or identical, to the Shields diagram. An alternative method that uses the movability number, defined as the ratio of the shear velocity to the particle＇s settling velocity, was employed in this study. A large amount of experimental data were used to develop an empirical incipient motion criterion based on the movability number. It is shown that this approach can provide a simple and accurate method of computing the threshold condition for sediment motion.

关键词： incipient motion sediment transport Shields diagram critical shear stress criticalshear velocity movability number

Sudden cardiac death and valvular pathology

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Forensic Sciences Research 2019年第3期4卷 280-286页

作者： Rosa H.A.M.Henriques de Gouveia francisco M.A.Corte Real Goncalves Forensic Clinical and Pathology Service Central Branch of the National Institute of Legal Medicine and Forensic SciencesCoimbraPortugal

Sudden death due to valvular heart disease is reported to range from 1% to 5% in native valves and around 0.2%-0.9%/year in *** nature of the diseases is varied,from heritable,congenital to *** may affect both genders in multiple age *** authors show and comment examples of the major nosologic aetiologies underlying unexpected exitus letalis of valvular nature.

关键词： Forensic sciences forensic pathology sudden death cardiac valvular pathology

Potential benefits of amino acid supplementation for cervid performance and nutritional ecology,with special focus on lysine and methionine:A review

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Animal Nutrition 2022年第4期11卷 391-401页

作者： Veit Ny Tersia Needham francisco Ceacero Department of Animal Science and Food Processing Faculty of Tropical AgriSciencesCzech University of Life Sciences PragueCzech Republic Department of Cattle Breeding Institute of Animal SciencePragueCzech Republic Food Research Institute Prague Czech Republic

Deer farming is a thriving industry for venison,velvet antlers,trophy hunting,and other *** and nutrition are important factors for improving production performance,especially dietary protein and amino acids(AAs),as they are the main components of all *** a few studies on AA supplementation(Lys,Met,Arg)have been performed on cervids,which show positive effects on weight gain,ADG,feed-:gain ratio,plasma AAs,carcass weight,dressing percentage,yield of high-quality muscles,storage of internal fat during winter,DM and CP digestibility,plasma protein-and fat-related metabolite concentrations,antler burr perimeter,weight,length and mineralisation,velvet antler yield,rumen volatile fatty acids,and microbiome *** these effects are relevant for supporting the production of cervids products,from venison to velvet or trophy antlers,as well as their general performance and well-being of captive-bred *** current available information suggests that AA supplementation can be especially interesting for animals fed low protein rations,and growing animals,but should be avoided in high rations and during winter,since it may promote the accumulation of internal *** effects on milk production and the concentrations of different hormones involved in the regulation of the antler cycle should be further explored.

关键词： Antler Deer Feed additive Protein Ruminant Venison