Results 71 to 80 of about 1,051,029 (290)

The Optimal Linear Quadratic Feedback State Regulator Problem for Index One Descriptor Systems [PDF]

In this note we present both necessary and sufficient conditions for the existence of a linear static state feedback controller if the system is described by an index one descriptor system. A priori no definiteness restrictions are made w.r.t.
Salmah, Y., Wijayanti, I.E., Engwerda, J.C.   +2 more
core  

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

FEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell, Thomas Walther, Egbert Hoiczyk   +2 more
wiley   +1 more source

Local Descriptor Revision

, 2017
In this chapter the properties of descriptor revision, as defined in Chapter 4, are further explored. Several alternative selection mechanisms are presented, and the properties of the resulting operations are investigated.
Sven Ove Hansson, Hansson, Sven Ove,
core   +1 more source

On computing least order fault detectors using rational nullspace bases [PDF]

, 2003
We propose a numerically reliable computational approach to design least order fault detectors using descriptor system techniques. This approach is based on a new numerically stable algorithm to compute least order rational nullspace bases of rational ...
A. Varga, Varga, Andras
core   +1 more source

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

Machine learning driven rational design of dual atom catalysts on graphene for carbon dioxide electroreduction

Nano Research
The development of high-performance atomic catalysts for the carbon dioxide reduction reaction (CO2RR) is a time-consuming process due to the complexity of the reaction mechanism and the uncertainty of the active site.
Dongxu Jiao, Xinyi Li, Mingzi Sun, Lin Liu, Jinchang Fan, Jingxiang Zhao, Bolong Huang, Xiaoqiang Cui   +7 more
doaj   +1 more source

Combining Statistical Features and Local Pattern Features for Texture Image Retrieval

IEEE Access, 2020
The complementary fusion of global and local features can effectively improve the performance of image retrieval. This article proposes a new local texture descriptor, combined with statistical modeling in transform domain for texture image retrieval ...
Hengbin Wang, Huaijing Qu, Jia Xu, Jiwei Wang, Yanan Wei, Zhisheng Zhang   +5 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source

Chemometrics for flavor science: Mapping structure–perception relationships using PCA and Fuzzy C-Means

Digital Chemical Engineering
This work investigates the proposition that flavor descriptors are systematically rooted in reproducible chemical features and that combinations of functional groups explain the overlap and multiplicity of sensory perceptions.
L.P. Queiroz, P. Lima, R.W.S. Pessoa, H. Martens, I.B.R. Nogueira, A.M. Ribeiro   +5 more
doaj   +1 more source

Why local hyper-softness is a more appropriate local reactivity descriptor than dual descriptor and Fukui function?

, 2023
Abstract In this paper, the reason why local hyper-softness (LHS) allows to make comparisons of local reactivities among molecular systems of similar or different sizes as scientific literature has evidenced in the last ten years is analyzed. This lies on the fact that LHS is an intensive property.
openaire   +1 more source