Results 91 to 100 of about 6,146 (283)

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

open access: yesAdvanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau   +9 more
wiley   +1 more source

Flexoelectrically Induced Polar Topology in Twisted SrTiO3 Membranes

open access: yesAdvanced Materials, EarlyView.
Twisted SrTiO3 bilayers host polar vortices of flexoelectric origin, revealed through combined experiment and theory. By reconstructing polarization from the toroidal moment of strain gradients, the work establishes a 3D chiral state with broken inversion and mirror symmetries.
Isabel Tenreiro   +13 more
wiley   +1 more source

Colorimetric assay of ethanol using alcohol dehydrogenase from dry baker's yeast

open access: yes, 2007
Alcohol dehydrogenases (ADHs) are oxidoreductases present in animal tissues, plants, and microorganisms. These enzymes attract major scientific interest for the evolutionary perspectives, afforded by their wide occurrence in nature, and for their use in ...
Zanon, Juliana P.   +3 more
core   +1 more source

On Tribonacci numbers written as a product of three Fibonacci numbers

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
The present paper examines the following Diophantine equation: Tn = Fk · Fl · Fm where Tn is the n-th Tribonacci number and likewise Fk is the k-th Fibonacci number and so on as variables.
Ozkaya Zeynep Demirkol
doaj   +1 more source

2,3-erythro-Dihydroxyhexacosanoic acid and homologs: isolation from yeast cerebrin phosphate and determination of their structures

open access: yesJournal of Lipid Research, 1973
Homologs of methyl esters of very polar fatty acids were obtained by methanolysis of cerebrin phosphate isolated from baker's yeast. The major ester component was isolated by preparative gas–liquid chromatography and was found to be 2,3 ...
Motonori Hoshi   +2 more
doaj   +1 more source

Mechanically Programmable DNA Hydrogel Microparticles for 3D Cellular Systems

open access: yesAdvanced Materials, EarlyView.
DNA hydrogel microparticles are designed to exhibit controllable viscoelasticity and stiffness across three orders of magnitude from 30Pa$30 \,\mathrm{Pa}$ to 6.5kPa$6.5 \,\mathrm{kPa}$. They are uptaken into fibroblast spheroids where they are actively remodeled by cellular forces depending on their mechanical properties.
Tobias Walther   +9 more
wiley   +1 more source

Elliptic logarithms, diophantine approximation and the Birch and Swinnerton-Dyer conjecture [PDF]

open access: yes, 2014
Most, if not all, unconditional results towards the abc-conjecture rely ultimately on classical Baker's method. In this article, we turn our attention to its elliptic analogue.Using the elliptic Baker's method, we have recently obtained anew upper bound ...
Surroca, Andrea, Bosser, Vincent
core   +1 more source

Flexible Dielectric Acoustic Resonator Patch for Tissue Regeneration

open access: yesAdvanced Materials, EarlyView.
A flexible dielectric acoustic resonator patch enables MHz‐range ultrasound generation through resonance amplification without using piezoelectric materials. Conformal integration on a curved substrate allows efficient acoustic delivery to tissue‐mimicking environments.
Donyoung Kang   +7 more
wiley   +1 more source

Evaluation of Baker's cyst with MRI

open access: yes, 2013
Baker kisti dizin posteromedialinde yer alan gastroknemius-semimembranozus bursasının distansiyonu olarak tanımlanmakta olup bu lezyonlar genellikle dizdeki kronik efüzyon sonucu meydana gelirler.
Ulusoy, Selim
core  

Endotoxin in the occupational environment of bakers: method of detection.

open access: yesInternational journal of occupational medicine and environmental health, 1995
The present study was conducted in a large mechanical city bakery. The AS-50 aspirators equipped with cellulose membrane filters were used for dust sampling. Airborne microbial content was assessed by means of sedimentation and aspiration using an Andersen sampler on Petri plates containing McConkey's medium.
A, Domańska, G, Stroszejn-Mrowca
openaire   +1 more source

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