检索结果-南通市图书馆

Oxalate Accumulation as Regulated by Nitrogen Forms and Its Relationship to Photosynthesis in Rice （Oryza sativa L.）

引用

Journal of Integrative Plant Biology 2005年第7期47卷 831-838页

作者： Xiu-MeiJI xin-xiangpeng LaboratoryofMolecularPlantPhysiology CollegeofLifeSciencesSouthChinaAgriculturalUniversityGuangzhou510642China

: Four-leaf rice seedlings (Oryza sativa L.), which had been cultivated in Kimura B complete nutrient solution, were treated with two nitrogen forms by replacing the nitrogen element in the complete solution with sole nitrate or ammonium (2.86 mmol/L). Nitrate-N nutrition tended to increase oxalate content in all parts of the plant, including the leaves, stems, roots, and root exudates, whereas ammonium had the opposite effect. Consequently, marked differences in oxalate content were observed between the two treatments throughout the time tested (0-12 d), with maximal differences of approximately 12-fold at 6 d after treatment. Photosynthetic/respiratory parameters were examined over time simultaneously with changes in oxalate content. Net photosynthetic rate, chlorophyll fluorescence parameters (i.e. maximal photochemical efficiency (Fv/Fm) and photochemical quantum yields of photosystem (PS)II (φPSII)), and respiratory rate were not significantly different between plants treated with the two nitrogen forms, although ammonium-fed plants had apparently higher leaf chlorophyll content than nitrate-fed plants. Leaf glucose content was altered little, but the content of fructose, sucrose, and total soluble sugar was significantly higher in the leaves of ammonium-fed plants than nitrate-fed plants. The results indicate that nitrate/ammonium may serve as efficient regulators of oxalate accumulation owing to regulation of metabolism in rice leaves rather than oxalate downward transfer and root excretion, and that photosynthetic metabolism is not directly correlated with the regulation of oxalate accumulation in rice plants.

关键词： nitrogen form oxalate accumulation photosynthesis rice

来源：

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

Nonlocal Symmetries and Explicit Solutions of the Boussinesq Equation

引用

Chinese Annals of Mathematics,Series B 2014年第6期35卷 841-856页

作者： xiangpeng xin Junchao CHEN Yong CHEN Shanghai Key Laboratory of Trustworthy Computing East China Normal University

The nonlocal symmetry of the Boussinesq equation is obtained from the known Lax pair. The explicit analytic interaction solutions between solitary waves and cnoidal waves are obtained through the localization procedure of nonlocal symmetry. Some other types of solutions, such as rational solutions and error function solutions, are given by using the fourth Painlev~ equation with special values of the parameters. For some interesting solutions, the figures are given out to show their properties.

关键词： Nonlocal symmetry Lax pair Prolonged system Explicit solution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Darboux transformation and soliton solutions of a nonlocal Hirota equation

引用

Chinese Physics B 2022年第2期31卷 242-249页

作者： Yarong Xia Ruoxia Yao xiangpeng xin School of Computer Science Shaanxi Normal UniversityXi’an 710062China School of Information and Engineering Xi’an UniversityXi’an 710065China School of Mathematical Sciences Liaocheng UniversityLiaocheng 252029China

Starting from local coupled Hirota equations,we provide a reverse space-time nonlocal Hirota equation by the symmetry reduction method known as the Ablowitz–Kaup–Newell–Segur scattering *** Lax integrability of the nonlocal Hirota equation is also guaranteed by existence of the Lax *** Lax pair,an n-fold Darboux transformation is constructed for the nonlocal Hirota equation by which some types of exact solutions are *** solutions with specific properties are distinct from those of the local Hirota *** order to further describe the properties and the dynamic features of the solutions explicitly,several kinds of graphs are depicted.

关键词： nonlocal Hirota equation Darboux transformation Lax pair soliton soultion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Darboux Transformation and Exact Solutions for High Order Nonlocal Coupled AKNS System

引用

Journal of Applied Mathematics and Physics 2021年第11期9卷 2592-2608页

作者： xiangpeng xin Zengxin Guo Yanxin Hu Linlin Zhang School of Mathematical Sciences Liaocheng University Liaocheng China

In this paper, we investigate an integrable high order nonlocal coupled Ablowitz-Kaup-Newell-Segur (AKNS) system for the first time. With the aid of Lax pair of this nonlocal system, Darboux transformation (DT) and new soliton-like solutions are obtained. Different from local equations, Darboux transformation of nonlocal systems needs to meet certain conditions. In this article, under the condition of symmetry reduction, the components of Darboux transformation need to satisfy . In order to study the dynamic information of the solutions, the images of the solutions are given.

关键词： High Order Nonlocal Equation Darboux Transformation Exact Solution

来源：

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

Interaction solutions and localized waves to the(2+1)-dimensional Hirota-Satsuma-Ito equation with variable coefficient

引用

Chinese Physics B 2023年第7期32卷 199-205页

作者：闫鑫颖刘锦洲辛祥鹏 School of Mathematical Sciences Liaocheng UniversityLiaocheng 252059China

This article investigates the Hirota-Satsuma-Ito equation with variable coefficient using the Hirota bilinear method and the long wave limit *** equation is proved to be Painlevé integrable by Painlevé *** the basis of the bilinear form,the forms of two-soliton solutions,three-soliton solutions,and four-soliton solutions are studied *** appropriate parameter values are chosen and the corresponding figures are *** breather waves solutions,lump solutions,periodic solutions and the interaction of breather waves solutions and soliton solutions,*** *** addition,we also analyze the different effects of the parameters on the *** figures of the same set of parameters in different planes are presented to describe the dynamical behavior of *** are important for describing water waves in nature.

关键词： (2+1)-dimensional variable coefficient Hirota-Satsuma-Ito equation Hirota bilinear method long wave limit method N-soliton solutions

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Darboux transformation,infinite conservation laws,and exact solutions for the nonlocal Hirota equation with variable coefficients

引用

Chinese Physics B 2023年第12期32卷 263-269页

作者：刘锦洲闫鑫颖金梦辛祥鹏 School of Mathematical Sciences Liaocheng UniversityLiaocheng 252059China

This article presents the construction of a nonlocal Hirota equation with variable coefficients and its Darboux *** zero-seed solutions,1-soliton and 2-soliton solutions of the equation are constructed through the Darboux transformation,along with the expression for N-soliton *** of coefficients that are taken as a function of time instead of a constant,i.e.,coefficient functionδ(t),on the solutions is investigated by choosing the coefficient functionδ(t),and the dynamics of the solutions are *** article utilizes the Lax pair to construct infinite conservation laws and extends it to nonlocal *** study of infinite conservation laws for nonlocal equations holds significant implications for the integrability of nonlocal equations.

关键词： infinite conservation laws nonlocal Hirota equation with variable coefficient soliton solutions Darboux transformation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

RLW-KdV方程的对称约化、精确解和守恒律

引用

应用数学学报 2018年第4期41卷 540-549页

作者：李志强刘汉泽辛祥鹏聊城大学数学科学学院

运用经典李群方法研究了正则长波-KdV方程,得到所有的向量场.然后,将正则长波-KdV方程约化成常微分方程,进一步利用e-φ（ε））展开法和Lambert W函数法求精确解.最后,利用李点对称求正则长波-KdV方程的伴随方程和守恒律.

关键词：经典李群方法正则长波-KdV方程精确解守恒律

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

非线性麦克斯韦方程最优系统及精确解

引用

聊城大学学报（自然科学版） 2021年第4期34卷 15-22,53页

作者：郭增鑫胡彦鑫辛祥鹏聊城大学数学科学学院山东聊城252059

研究一类二阶非线性麦克斯韦方程的对称约化以及精确解问题。首先利用李群方法求出该方程的向量场,进而方程的对称也可以得到,并通过求解常微分方程初值问题得到了该方程的对称群。其次,为了研究对称的等价性,利用一维最优化方法得到该... 详细信息

研究一类二阶非线性麦克斯韦方程的对称约化以及精确解问题。首先利用李群方法求出该方程的向量场,进而方程的对称也可以得到,并通过求解常微分方程初值问题得到了该方程的对称群。其次,为了研究对称的等价性,利用一维最优化方法得到该方程的最优系统,借助最优系统对方程进行对称约化。为了方便求解约化后的常微分方程,对一些参数做了一定的约束,因此得到的解是在上述约束条件下的解析解。最后构造了这些情况下的群不变解,并求出一系列新的精确解。

关键词：非线性麦克斯韦方程李群对称精确解最优系统

来源：

维普期刊数据库

同方期刊数据库评论