Results 131 to 140 of about 1,471,856 (300)

Pore structure as well as mechanical and seepage characteristics of hot-pressed coal briquettes with different coal ranks

Meitan xuebao
To address the problem that the strength and permeability of coal briquettes used in physical similarity simulation tests differ significantly from those of raw coal, this study investigates the pore structure, mechanical and seepage characteristics of ...
Jiang XU, Shoujian PENG, Xu WANG, Li JIA, Houqin HAN, Zhonghui WANG, Qingqing GAN   +6 more
doaj   +1 more source

Statistical tests and estimators of the rank of a matrix and their applications in econometric modelling [PDF]

Testing and estimating the rank of a matrix of estimated parameters is key in a large variety of econometric modelling scenarios. This paper describes general methods to test for and estimate the rank of a matrix, and provides details on a variety of ...
Camba-Méndez, Gonzalo, Kapetanios, George   +1 more
core  

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Comparison between asymptotic and re-randomisation tests under non-proportional hazards in a randomised controlled trial using the minimisation method

BMC Medical Research Methodology
Background Pocock-Simon’s minimisation method has been widely used to balance treatment assignments across prognostic factors in randomised controlled trials (RCTs).
Ryusei Kimura, Shogo Nomura, Kengo Nagashima, Yasunori Sato   +3 more
doaj   +1 more source

Experimental evidence for variation across exclusive modifiers

Glossa
This paper is an investigation of variation across the English exclusive modifiers only, just, and merely—a domain that has received ample attention in the theoretical literature but has thus far not been subjected to experimental testing.
Eszter Ronai, Lucas Fagen
doaj   +2 more sources

Cell wall target fragment discovery using a low‐cost, minimal fragment library

FEBS Letters, EarlyView.
LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan, Mathew Stanley, Olawale Raimi, Andrew T. Ferenbach, Helge C Dorfmueller, Daan M. F. van Aalten   +5 more
wiley   +1 more source

Rank Test Based On Matrix Perturbation Theory [PDF]

In this paper, we propose methods of the determination of the rank of matrix. We consider a rank test for an unobserved matrix for which an estimate exists having normal asymptotic distribution of order N1/2 where N is the sample size. The test statistic
Zaka Ratsimalahelo
core  

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Small-Sample Properties of Censored-Data Rank Tests [PDF]

, 1983
Chmelevsky, D., Kellerer, Albrecht M.
core   +1 more source