Results 51 to 60 of about 296,793 (263)

Early evolutionary history of the seed

Biological Reviews, EarlyView.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman, Alan R. T. Spencer, Jason Hilton   +2 more
wiley   +1 more source

Polarization vision and the physiological basis for trichromatic vision in Philaenus spumarius: Understanding host‐seeking behaviour in insect vectors for Xylella fastidiosa control

Annals of Applied Biology, EarlyView.
We investigated the role of vision in host‐seeking behaviour by Philaenus spumarius, the main European vector of Xylella fastidiosa, through an integrated anatomical, optical, physiological, and behavioural study. Our data highlight that the spittlebug uses visual cues, including polarized light, which may aid in detecting the polarized reflections ...
Domen Lazar, Elizabeth Clark, Andrej Meglič, Daniele Cornara, Gregor Belušič   +4 more
wiley   +1 more source

Investigation of Improved Labyrinth Seal Stability Accounting for Radial Deformation

Aerospace
This study examines the labyrinth seal disc of an aero-engine, specifically analysing the radial deformation caused by centrifugal force and heat stress during operation.
Guozhe Ren, Hongyuan Tang, Dan Sun, Wenfeng Xu, Yu Li   +4 more
doaj   +1 more source

Numerical investigation on fluid force acting on shaft seals in turbo-machines (Effect of seal length and gap)

Nihon Kikai Gakkai ronbunshu, 2014
Labyrinth seals have the potential to cause rotordynamic instability induced by the fluid force of seal flows. We conducted a computational fluid dynamics (CFD) study to investigate the rotordynamic characteristics of the shaft labyrinth seal of a steam ...
Noriyo NISHIJIMA, Akira ENDO, Kazuyuki YAMAGUCHI   +2 more
doaj   +1 more source

TRP canonical 4 and/or 5 channel inhibition reduces aversion‐ and increases reward‐responding in chronically stressed mice

British Journal of Pharmacology, EarlyView.
Abstract Background and Purpose Pharmacological inhibition of TRPC4 and/or TRPC5 channels reduces Pavlovian aversion memory in stressed mice and reduces amygdala reactivity to aversion in humans with depression. The aims of this mouse study were to improve understanding of these anxiolytic processes, determine whether there are corrective effects on ...
Giulia Poggi, Deniz Queisser, Alena Senn, Hannes Sigrist, Diana Kúkeľová, Lorraine Madur, Nagiua Cuomo‐Haymour, Mélisse Robert, Sophie Schmid, Adrián Portalés, Sophie Simard, Naguib Mechawar, Bastian Hengerer, Stefan Just, Christopher R. Pryce   +14 more
wiley   +1 more source

Comparative Study on the Leakage Characteristics and Parameter Influence of Bio-Inspired Fishway Staggered Labyrinth Seals

Lubricants
Innovating seal structures and optimizing size parameters are effective ways to enhance the leakage characteristics of labyrinth seals (LSs). Inspired by the ecological fishways with high flow resistance on dam sides, a novel bio-inspired staggered ...
Zhentao Yu, Jinbo Jiang, Xuan Zhang, Mengli Zhang, Canlong Li   +4 more
doaj   +1 more source

Numerical Simulation of Labyrinth Seal of High Speed EMU Gearbox based on Fluent

Jixie chuandong, 2017
Taking designed labyrinth seal of a high speed EMU gearbox as the research object. The numerical simulation of the internal flow field of labyrinth seal is carried out by using the Fluent software,the pressure,speed,velocity vector and turbulence ...
Tian Huajun, Fan Naize, Pei Bang, Zhao Jiadong, Miao Weiwei, Ning Ke, Liu Zhongming, Wu Anwei, Li Baokui   +8 more
doaj  

Placental mitochondrial metabolic adaptation maintains cellular energy balance in pregnancy complicated by gestational hypoxia

The Journal of Physiology, EarlyView.
Abstract figure legend Placental mitochondrial adaptation to gestational hypoxia. Hypoxic pregnancy in sheep increases placental insulin like growth factor 2 (IGF2) signalling (1), which is associated with a shift in capacity away from β‐oxidation (2) and complex I‐mediated respiration (3), while maintaining total oxidative phosphorylation capacity (4).
Wen Tong, Beth J. Allison, Kirsty L. Brain, Olga V. Patey, Youguo Niu, Kimberley J. Botting, Sage G. Ford, Tess A. Garrud, Peter F. B. Wooding, Qiang Lyu, Lin Zhang, Jin Ma, Alice P. Sowton, Katie A. O'Brien, Tereza Cindrova‐Davies, Hong Wa Yung, Graham J. Burton, Andrew J. Murray, Dino A. Giussani   +18 more
wiley   +1 more source

Sex‐Specific Control and Incomplete Matings: Sperm Removal Behavior in a Bush Cricket Species

Ethology, Volume 132, Issue 3, Page 194-203, March 2026.
In this study, we investigated which sex influences the duration of sperm removal behaviour (SRB) in the ornate bush cricket, Metaplastes ornatus. Female traits showed a weak effect on SRB duration, and lighter females mated more frequently. Frequent unsuccessful mating terminations shortened SRB indicating high level of sexual conflict.
Chiara Flaskamp, Klaus Reinhold, Tuba Rizvi   +2 more
wiley   +1 more source

Ansys CFX numerical study of stages centrifugal compressor with low-flow rate coefficient

MATEC Web of Conferences, 2018
The article presents results of applying the methods of computational fluid dynamics for model low-flow rate stages of centrifugal compressors with flow rate coefficient F = 0.028.
Yablokov Aleksey, Yanin Ivan, Danilishin Aleksey, Zuev Anatoliy   +3 more
doaj   +1 more source