Results 81 to 90 of about 17,255 (252)

Studies on ion movements in Malpighian tubules of Locusta migratoria L., with particular reference to their endocrine control [PDF]

, 1990
Intracellular microelectrodes were used in conjunction with ion substitution, agonists and inhibitors of known transport processes and diuretic hormone (DH), to investigate the mechanisms whereby ions cross the basal and apical cell membranes of the ...
Fogg, Kay Elizabeth, Fogg, K.E
core  

Cusp/cleft auroral activity in relation to solar wind dynamic pressure, interplanetary magnetic field Bz and By

, 1994
Continuous optical observations of cusp/cleft auroral activities within ≈ 09-15 MLT and 70-76° magnetic latitude are studied in relation to changes in solar wind dynamic pressure and interplanetary magnetic field (IMF) variability.
Opsvik, D., Burlaga, L. F., Brekke, A., Moen, J., Lazarus, A. J., Hansen, T., Lybekk, B., Jacobsen, B., Lepping, R., Farrugia, Charlie J., Sandholt, P. E., Friis-Christensen, E., Egeland, A., Hotlet, J. A.   +13 more
core   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

Joint response characteristics of AE and PSC in coal rheological-impact process

Frontiers in Earth Science
A combined monitoring experiment of pressure stimulated currents (PSC) and acoustic emission (AE) signals was conducted on coal samples under the coupled action of rheology and impact load.
Dongming Wang, Dongming Wang, Xueqiu He, Enyuan Wang, Enyuan Wang, Changqing Li, Dexing Li, Dexing Li, Zihao Mao, Zihao Mao   +9 more
doaj   +1 more source

Symbolic Regression and Multi‐Objective Optimization of the Flory–Huggins Interaction Parameter for Hydrogels

Advanced Engineering Materials, EarlyView.
We develop a data‐driven method to derive the mathematical expressions of the Flory–Huggins interaction parameter χ for the swelling behavior of temperature–responsive hydrogels. Starting from initial assumptions of χ, our workflow combines Bayesian optimization, Flory–Rehner theory, and symbolic regression to generate candidate χ expressions.
Yawen Wang, Adrian Ehrenhofer, Thomas Wallmersperger   +2 more
wiley   +1 more source

Intraluminal Pressure Triggers Myogenic Response via Activation of Calcium Spark and Calcium-Activated Chloride Channel in Rat Renal Afferent Arteriole

, 2018
Myogenic contraction of renal arterioles is an important regulatory mechanism for renal blood flow autoregulation. We have previously demonstrated that integrin-mediated mechanical force increases the occurrence of Ca2+ sparks in freshly isolated renal ...
Yip, Kay-Pong, Wang, Lei, Ribeiro-Silva, Luisa, Balasubramanian, Lavanya, Kan, Chen, Liu, Ruisheng, Sham, James S. K.   +6 more
core   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source

Microdevices for extensional rheometry of low viscosity elastic liquids : a review

, 2013
Extensional flows and the underlying stability/instability mechanisms are of extreme relevance to the efficient operation of inkjet printing, coating processes and drug delivery systems, as well as for the generation of micro droplets. The development of
Alves, MA, Galindo-Rosales, Francisco J, Mónica S. N. Oliveira, Galindo Rosales, FJ, Oliveira, Monica, Alves, M.A.   +5 more
core   +1 more source

Soft Mechanical‐Electrical Logic Using Liquid Metal‐Filled 3D‐Printed Architectures

Advanced Engineering Materials, EarlyView.
We present 3D‐printed soft mechanical–electrical logic elements that use liquid metal–filled silicone tubes actuated by thermoplastic polyurethane/polylactic acid (TPU/PLA) architectures to produce Boolean operations. Complementary normally open and normally closed unit cells perform repeatable binary transitions and can be combined into more complex ...
Christoph Lehmann, Ryan Kalgreen, Laura M. Comella   +2 more
wiley   +1 more source

Effects of Transcranial Direct Current Stimulation (tDCS) on Cognition in Patients Treated for Normal Pressure Hydrocephalus

Revista Brasileira de Neurologia
This study investigated the effects of transcranial direct current stimulation (tDCS) on the cognition of patients with normal pressure hydrocephalus (NPH) who underwent cerebrospinal fluid shunt surgery. Five participants, aged between 60 and 80 years, were assessed using neuropsychological instruments at three time points: before, three days after ...
Camila Santos Cechi, Cristiano Pedroso, Fernando Campos Gomes Pinto   +2 more
openaire   +1 more source