Results 41 to 50 of about 2,581,576 (219)

Structure Revision of (22)-24-Methylcholesta-8(14),22-diene-3β,5α,6β,7α-tetraol from the Marine-Derived Fungus sp

open access: yesNatural Product Communications, 2016
Careful reexamination of the published 1 H- and 13 C-NMR spectral data of (22 E )-24-methylcholesta-8(14),22-diene-3β,5α,6β,7α-tetraol ( 1 ), isolated from the marine-derived fungus Penicillium sp., indicates that, in reality, the compound is 5α,6α-epoxy-
Yasunori Yaoita, Koichi Machida
doaj   +1 more source

Sound resonances in supercritical and superfluid helium

open access: yesVìsnik Harkìvsʹkogo nacìonalʹnogo unìversitetu ìmenì V.N. Karazìna. Serìâ: fìzika., 2021
For twenty years of research, the processes of radiation and dissipation occurring during oscillations of quartz tuning forks in superfluid helium and its mixtures have turned from an object of research into a tool for studying the properties of helium ...
N.O. Herashchenko   +3 more
doaj   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

open access: yesFEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure   +3 more
wiley   +1 more source

Structure Revision of 5β,6β-Epoxy-(22)-ergosta-8,22-diene-3β,7β-diol from the Gorgonian sp

open access: yesNatural Product Communications, 2017
Careful reexamination of the published 1 H- and 13 C-NMR spectral data of 5β,6β-epoxy-(22 E )-ergosta-8,22-diene-3β,7β-diol ( 1 ), isolated from the gorgonian Pinnigorgia sp., indicates that, in reality, the compound is 5α,6α-epoxy-(22 E )-ergosta-8,22 ...
Yasunori Yaoita, Koichi Machida
doaj   +1 more source

What is a disappearing intra-abdominal mass?

open access: yesThe Turkish Journal of Gastroenterology, 2019
Cite this article as: Kumar Sahoo A, Goneppanavar M, Rajan S, Raj R, Prasad V. What is a disappearing intra-abdominal mass? Turk J Gastroenterol 2019; 30(9): 843-5.
Ashok Kumar Sahoo   +4 more
doaj   +1 more source

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

open access: yesFEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto   +3 more
wiley   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

open access: yesFEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa   +2 more
wiley   +1 more source

Determining the Minimal Number of Passive Hip and Knee Joint Movement Repetitions Recommended for the Stiff Rectus Femoris Muscle Due to Osgood–Schlatter Disease

open access: yesChildren
Background/Objectives: Osgood–Schlatter disease (OSD) is a common overuse condition in adolescents characterized by increased stiffness of the rectus femoris muscle, which contributes to pain and functional limitations around the knee.
Naoki Ikeda   +5 more
doaj   +1 more source

Modelling stem cell differentiation related processes—A practical overview for biologists

open access: yesFEBS Letters, EarlyView.
Stem cell differentiation is complex and difficult to control experimentally. This review introduces suitable computational modelling approaches that can support stem cell research, from mechanistic ODE and abstract models to multiscale and deep learning methods.
Ricco Zeegelaar   +4 more
wiley   +1 more source

Measuring pre-service chemistry teachers’ graph and table interpretation skills: when performance meets confidence

open access: yesChemistry Teacher International
This study investigates pre-service chemistry teachers’ ability to interpret data in graphs and tables, justify their responses, and reflect on their performance using a multi-tier diagnostic Graphs and Tables Engagement (GATE) test.
Hamerská Lucie   +2 more
doaj   +1 more source

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