Results 121 to 130 of about 6,961,378 (302)

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth   +6 more
wiley   +1 more source

Pro-pectin methylesterases as zymogens for plant cell wall mediated immunity

open access: yes, 2023
Plants modulate the activity of immunity-related pectin methylesterase (IT-PME) against microbes (Del Corpo et al., 2020). This process could induce the formation of "egg box" structures, resulting in stiffening of the cell wall.
Vincenzo Lionetti   +2 more
core  

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

Analysis of Bacterial Cell Surface Chemical Composition Using Cryogenic X-Ray Photoelectron Spectroscopy

open access: yes, 2016
This chapter describes a method for measuring the average surface chemical composition with respect to lipids, polysaccharides, and peptides (protein + peptidoglycan) for the outer part of the bacterial cell wall.
Ramstedt, Madeleine,   +3 more
core   +1 more source

Flexural Behavior of 3D‐Printed Porous Bouligand‐Structured Polymers: Influence of Pitch Angle and Porosity

open access: yesAdvanced Engineering Materials, EarlyView.
This study examines how helicoidal architectures with different porosities respond to bending. Adjusting layer angle and spacing in 3D‐printed polymers reveals clear tradeoffs between stiffness, strength, and energy absorption. Experiments and simulations highlight designs that distribute stress effectively, offering pathways for optimizing lightweight
Praveenkumar Subhash Patil   +2 more
wiley   +1 more source

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev   +2 more
wiley   +1 more source

Can cell wall peroxidase activity explain the leaf growth response of Lolium temulentum L. during drought?

open access: yes, 1997
In two experiments, the effect has been investigated of a mild and a more prolonged drought on the spatial distribution of growth, epidermal cell lengths and cell wall peroxidase activities in the leaf elongation zone of the grass species Lolium ...
Thompson, D.S.   +2 more
core   +1 more source

GA20ox orchestrates distinct roles in cambium and xylem development via gibberellin and auxin signaling in poplar

open access: yesIndustrial Crops and Products
Gibberellin 20-oxidase (GA20ox) is a key enzyme of gibberellin (GA) biosynthesis. Its involvement during secondary growth in trees is incompletely understood.
Linxi Yang   +4 more
doaj   +1 more source

The Cell Wall ofStreptococcus pneumoniae

open access: yesMicrobiology Spectrum, 2019
ABSTRACT Streptococcus pneumoniae has a complex cell wall that plays key roles in cell shape maintenance, growth and cell division, and interactions with components of the human host. The peptidoglycan has a heterogeneous composition with more than 50 subunits (muropeptides)—products of several peptidoglycan-modifying
Tomasz A, Massidda O, Vollmer W.
openaire   +8 more sources

Inflammation Unchecked: Concurrent Kawasaki Disease and Stevens‐Johnson Syndrome in an 18‐Month‐Old Child

open access: yes
Arthritis Care &Research, EarlyView.
Catherine Deffendall   +6 more
wiley   +1 more source

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