Results 21 to 30 of about 320,689 (383)

Factors modulating 99mTc‐MAA planar lung dosimetry for 90Y radioembolization

open access: yesJournal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose To investigate the accuracy and biases of predicted lung shunt fraction (LSF) and lung dose (LD) calculations via 99mTc‐macro‐aggregated albumin (99mTc‐MAA) planar imaging for treatment planning of 90Y‐microsphere radioembolization.
Benjamin P. Lopez   +4 more
wiley   +1 more source

Plant speciation in the Quaternary

open access: yesPlant Ecology & Diversity, 2021
Background There are conflicting views between palaeobotanists and plant systematists/evolutionary biologists regarding the occurrence of plant speciation in the Quaternary.
J. Kadereit, R. Abbott
semanticscholar   +1 more source

The application of multiple metrics in deformable image registration for target volume delineation of breast tumor bed

open access: yesJournal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Background and purpose For postoperative breast cancer patients, deformable image registration (DIR) is challenged due to the large deformations and non‐correspondence caused by tumor resection and clip insertion. To deal with it, three metrics (fiducial‐, region‐, and intensity‐based) were jointly used in DIR algorithm for improved accuracy ...
Xin Xie   +6 more
wiley   +1 more source

SWISS-MODEL: modelling protein tertiary and quaternary structure using evolutionary information

open access: yesNucleic Acids Res., 2014
Protein structure homology modelling has become a routine technique to generate 3D models for proteins when experimental structures are not available. Fully automated servers such as SWISS-MODEL with user-friendly web interfaces generate reliable models ...
M. Biasini   +10 more
semanticscholar   +1 more source

Image quality improvement in low‐dose chest CT with deep learning image reconstruction

open access: yesJournal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Objectives To investigate the clinical utility of deep learning image reconstruction (DLIR) for improving image quality in low‐dose chest CT in comparison with 40% adaptive statistical iterative reconstruction‐Veo (ASiR‐V40%) algorithm. Methods This retrospective study included 86 patients who underwent low‐dose CT for lung cancer screening ...
Qian Tian   +7 more
wiley   +1 more source

Biological Activity of Quaternary Ammonium Salts and Their Derivatives

open access: yesPathogens, 2020
Besides their positive role, microorganisms are related to a number of undesirable effects, including many diseases, biodeterioration and food spoilage, so when their presence is undesired, they must be controlled.
D. Kwaśniewska   +2 more
semanticscholar   +1 more source

Genetic consequences of climatic oscillations in the Quaternary.

open access: yesPhilosophical transactions of the Royal Society of London. Series B, Biological sciences, 2004
An appreciation of the scale and frequency of climatic oscillations in the past few million years is modifying our views on how evolution proceeds. Such major events caused extinction and repeated changes in the ranges of those taxa that survived.
G. Hewitt
semanticscholar   +1 more source

40Ar/39Ar ages of Quaternary volcanic rocks from the midwest of the Leizhou Peninsula, and their geologic significance

open access: yesDizhi lixue xuebao, 2023
Quaternary volcanic rocks are widely distributed in the Leizhou Peninsula, but the age of volcanic formation remains controversial. This study used the high-precision laser stepwise heating 40Ar/39Ar method to date the age of volcanic samples from the ...
LI Xiang   +4 more
doaj   +1 more source

The configuration of Northern Hemisphere ice sheets through the Quaternary

open access: yesNature Communications, 2019
Our understanding of how global climatic changes are translated into ice-sheet fluctuations and sea-level change is currently limited by a lack of knowledge of the configuration of ice sheets prior to the Last Glacial Maximum (LGM).
C. Batchelor   +8 more
semanticscholar   +1 more source

Microstratigraphic Records as Tools for the Detection of Climatic Changes in Tana di Badalucco Cave (Liguria, NW Italy)

open access: yesGeosciences, 2019
Tana di Badalucco cave is located in Imperia (Liguria, Italy), not far from the French border. This site is scarcely known and it has never been studied accurately, even though different archaeological excavations have returned really important elements,
Eleonora Sessa   +6 more
doaj   +1 more source

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