Results 71 to 80 of about 855,886 (285)
Pediatric Blood &Cancer, EarlyView.Abstract Background A routine baseline echocardiogram is often obtained prior to anthracycline administration in children with cancer. The utility of baseline echocardiogram is unclear in patients with standard risk B‐cell acute lymphoblastic leukemia (SR B‐ALL) as their anthracycline cumulative dose is low.
Ziyad Alrajhi +4 more
wiley +1 more source
Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM
FEBS Letters, EarlyView.Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley +1 more source
Essential norms of some singular integral operators [PDF]
Archiv der Mathematik, 1999 Let \(S\) be a singular integral operator on the unit circle \(T\). The author calculates the essential norm \(\|S_{a,b}\|_e\) in \(L^2(T)\) of the singular integral operator \(S_{a,b}=aP+bQ\), where \(P=\frac 12 (I+S), Q=\frac 12 (I-S)\) are projections in \(L^2(T)\) and \(a,b \in L^\infty(T)\). Theorem. Let \(a,b \in L^\infty (T)\). Then \[ \|S_{a,b}\
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Essential Norm of Composition Operators on Banach Spaces of Hölder Functions
Abstract and Applied Analysis, 2011 Let (X,d) be a pointed compact metric space, let ...
A. Jiménez-Vargas +2 more
doaj +1 more source
The essential norm of multiplication operators on $L_p(��)$
, 2022 We show that the formula for the essential norm of a multiplication operator on $L_p$, for ...
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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 +11 more
wiley +1 more source
The essential norm of bounded diagonal infinite matrices acting on Banach sequence spaces
Demonstratio MathematicaWe calculate the essential norm of bounded diagonal infinite matrices acting on Köthe sequence spaces. As a consequence of our result, we obtain a recent criteria for the compactness of multiplication operator acting on Köthe sequence spaces.
Fernández Julio C. Ramos +2 more
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A Linear Composition Operator on the Bloch Space
MathematicsLet n∈N0, ψ be an analytic self-map on D and u be an analytic function on D. The single operator Du,ψn acting on various spaces of analytic functions has been a subject of investigation for many years.
Xiangling Zhu, Qinghua Hu
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Essential Norm of Operators into Weighted-Type Spaces on the Unit Ball
Abstract and Applied Analysis, 2011 The essential norm of any operator from a general Banach space of holomorphic functions on the unit ball in ℂn into the little weighted-type space is calculated. Some applications of the formula are given.
Pablo Galindo +2 more
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Weighted Composition Operators from Besov Zygmund-Type Spaces into Zygmund-Type Spaces
Journal of Function Spaces, 2020 The boundedness, compactness, and essential norm of weighted composition operators from Besov Zygmund-type spaces into Zygmund-type spaces are investigated in this paper.
Xiangling Zhu, Nanhui Hu
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