Results 41 to 50 of about 10,849,141 (303)

Mapping of Membrane Lipid Order in Root Apex Zones of Arabidopsis thaliana

open access: yesFrontiers in Plant Science, 2015
In this study, we used the fluorescence probe, Di-4-ANEPPDHQ, to map the distribution of membrane lipid order in the apical region of Arabidopsis roots.
Xiaoyu eZhao   +5 more
doaj   +1 more source

Reconstructing enzyme evolution by protein engineering

open access: yesFEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler   +2 more
wiley   +1 more source

Bootstrap Unit Root Tests [PDF]

open access: yes
We consider the bootstrap unit root tests based on autoregressive integrated models, with or without deterministic time trends. A general methodology is developed to approximate asymptotic distributions for the models driven by integrated time series ...
Joon Y. Park
core   +2 more sources

About the geometrical properties of the root condition for the third order polynomials

open access: yesLietuvos Matematikos Rinkinys, 1999
This paper deals with a root condition for polynomial of the second and third order. We prove the root criterion for such polynomial with complex coefficients and find regions for the root condition in the special coefficients' phase space.
Artūras Štikonas
doaj   +3 more sources

A range unit root test [PDF]

open access: yes, 2004
Since the seminal paper by Dickey and Fuller in 1979, unit-root tests have conditioned the standard approaches to analyse time series with strong serial dependence, the focus being placed in the detection of eventual unit roots in an autorregresive model
García, Ana   +2 more
core   +1 more source

Generating Root-Finder Iterative Methods of Second Order: Convergence and Stability

open access: yesAxioms, 2019
In this paper, a simple family of one-point iterative schemes for approximating the solutions of nonlinear equations, by using the procedure of weight functions, is derived. The convergence analysis is presented, showing the sufficient conditions for the
Francisco I. Chicharro   +3 more
doaj   +1 more source

Differential Variation in Non-structural Carbohydrates in Root Branch Orders of Fraxinus mandshurica Rupr. Seedlings Across Different Drought Intensities and Soil Substrates

open access: yesFrontiers in Plant Science, 2021
Non-structural carbohydrates (NSCs) facilitate plant adaptation to drought stress, characterize tree growth and survival ability, and buffer against external disturbances.
Li Ji   +7 more
doaj   +1 more source

Order quasisymmetric functions distinguish rooted trees [PDF]

open access: yesJournal of Algebraic Combinatorics, 2017
Richard P. Stanley conjectured that finite trees can be distinguished by their chromatic symmetric functions. In this paper, we prove an analogous statement for posets: Finite rooted trees can be distinguished by their order quasisymmetric functions.
Takahiro Hasebe, Shuhei Tsujie
openaire   +5 more sources

Conserved binding mode but diverse interfaces of MreC‐PBP2 interactions

open access: yesFEBS Letters, EarlyView.
The crystal structure of abMreC reveals a conserved two β‐barrel architecture and provides structural insights into its role within the bacterial elongasome. The abMreC–abPBP2 complex model identifies the molecular basis of MreC‐mediated PBP2 recognition, contributing to the regulation of peptidoglycan synthesis.
Hyunseok Jang   +4 more
wiley   +1 more source

Basic Properties of Primitive Root and Order Function

open access: yesFormalized Mathematics, 2012
Summary In this paper we defined the reduced residue system and proved its fundamental properties. Then we proved the basic properties of the order function. Finally, we defined the primitive root and proved its fundamental properties. Our work is based on [12], [8], and [11].
Ma, Na, Liang, Xiquan
openaire   +3 more sources

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