Results 51 to 60 of about 58,230 (252)
Chemistry &Biodiversity, EarlyView.ABSTRACT This study investigated the flavonoid compounds and their biological activities in methanol extracts obtained from root, stem, leaf, and flower parts of Amaranthus retroflexus L. Flavonoids in the extracts were characterized for the first time by liquid chromatography–highresolution mass spectrometry (LC–HRMS), and a total of eight flavonoid ...
Bedrettin Selvi +6 more
wiley +1 more source
Journal of Dental Sciences, 2017 Background/purpose: Inadequacy to locate the second mesiobuccal canal (MB2) canal leads to the highest probability of endodontic failure in permanent maxillary first molars (PMFMs) and still remains a constant challenge for many clinicians.
Chi-Chun Su +9 more
doaj
Splitting Technique in the Neolithic Toda-1 Grotto (Southern Uzbekistan)
Археология евразийских степейThe article is devoted to the results of studying the technique of splitting the stone industry of the newly discovered Neolithic site Toda-1 in the south of Uzbekistan in 2016.
Bakhtiyor K. Sayfullaev +3 more
doaj +1 more source
Effect of Sand Particle Size on Sand–Water Flow in a Francis‐99 Distributor
Energy Science &Engineering, EarlyView.ABSTRACT To examine the sand–water flow characteristics in the distributor of the Francis‐99 hydraulic turbine, numerical simulations were conducted using the Mixture multiphase flow model, focusing on the impact of varying sand particle sizes. The findings indicate that near‐wall velocities of sand and water in the fixed and guide vanes of the ...
Ziyao Zhou +7 more
wiley +1 more source
Curvature bounds for surfaces in hyperbolic 3-manifolds
, 2010 We prove existence of thick geodesic triangulations of hyperbolic 3-manifolds and use this to prove existence of universal bounds on the principal curvatures of surfaces embedded in hyperbolic 3-manifolds.Comment: 21 pages, 9 figures, published version ...
Breslin +13 more
core +1 more source
Solid–Liquid Flow Analysis of Francis‐99 Turbine Runner: Effects of Sediment Concentration
Energy Science &Engineering, EarlyView.ABSTRACT This study examines the behavior of solid–liquid two‐phase flow within the runner of the Francis‐99 turbine. Numerical simulations were carried out by Ansys Fluent software using the Mixture multiphase flow model along with the Realizable k‐ε turbulence model to analyze the solid–liquid two‐phase flow in the turbine runner.
Kang Xu +6 more
wiley +1 more source
Amicable Heron triangles [PDF]
arXiv, 2021 A Heron triangle is a triangle whose side lengths and area are integers. Two Heron triangles are amicable if the perimeter of one is the area of the other. We show, using elementary techniques, that there is only one pair of amicable Heron triangles.
arxiv
Applying Bergmann's Rule to Species Conservation Planning 贝格曼法则在物种保护规划中的应用
Integrative Conservation, EarlyView.Although Bergman's rule has extensively been studied, its implications in species conservation have not been clear, especially in the context of climate change (global warming). Here, we discuss the potential applications of the “rule” based on IUCN's (2022) Red List and suggest species' body size to be an important ecological indicator in future long ...
Qinfeng Guo +4 more
wiley +1 more source
No perfect triangle is isosceles [PDF]
arXiv, 2020 A perfect triangle is a triangle with rational sides, medians, and area. In this article, we use a similar strategy due to Pocklington to show that if $\Delta$ is a perfect triangle, then it cannot be an isosceles triangle. It gives a partial answer to a question of Richard Guy, who asked whether any perfect triangles exist.
arxiv
Characteristics of ocean-reflected short radar pulses with application to altimetry and surface roughness determination [PDF]
, 1972 Current work related to geodetic altimetry is summarized. Special emphasis is placed on the effects of pulse length on both altimetry and sea-state estimation.
Hayne, G. S., Miller, L. S.
core +1 more source