Results 131 to 140 of about 6,146 (283)

A METHOD FOR THE SIMULTANEOUS DEMONSTRATION OF CHOLINE-CONTAINING PHOSPHOLIPIDS AND NEUTRAL LIPIDS IN TISSUE SECTIONS

open access: yes, 1965
A modification of Baker's dichromate-acid hematein test combined with an Oil Red O counterstain is presented. Chromatographic analysis of the procedure clearly demonstrates the selective staining of choline-containing phospholipids (blue-grey) and ...
BARBARA HUBBARD, CURTIS BOURGEOIS
core   +1 more source

Enhancing Small Molecule Sensing With Aptameric Functionalized Nano Devices

open access: yesAdvanced Materials Technologies, EarlyView.
Unveiling an ultra‐sensitive, non‐invasive neurotransmitter sensor. For the first time, a nanoscale sensor for detecting an important neurotransmitter was demonstrated using micro‐electromechanical systems (MEMS) technology. Our approach utilized field‐effect transistor (FET)‐based readout to enable pico‐molar detection of biomarkers in sweat.
Thi Thanh Ha Nguyen   +11 more
wiley   +1 more source

Aluminum Oxynitride‐Engineered Transparent Aluminum Nitride Resistive Memory for Low‐Leakage Multilevel Switching in Micro‐LED Pixels

open access: yesAdvanced Materials Technologies, EarlyView.
An AlON interfacial layer is engineered within an AlN switching layer to enable transparent RRAM with four stable resistance states. The device achieves low‐voltage multilevel switching and a high HRS, allowing precise grayscale modulation and preventing light leakage in micro‐LEDs operated at VDD = 2.7 V.
Sung Keun Choi   +7 more
wiley   +1 more source

Improvement of the stability of the alcohol dehydrogenase from baker's yeast using polymers and salts for alcohol determination in beverages

open access: yes, 2014
An alcohol dehydrogenase (ADH) was purified from dry baker's yeast. This is a key enzyme of the primary short-chain alcohol metabolism in many organisms.
Peres, Maristela de Freitas Sanches [UNESP]   +2 more
core  

Understanding Interfacial Photoswitching Mechanisms in Atomically‐Thin TMD‐Spiropyran Hybrids

open access: yesAdvanced Materials Technologies, EarlyView.
Photochromic molecules can effectively modulate the optoelectronic properties of atomically thin transition metal dichalcogenide semiconductors. Spiropyran that switches its chemical configuration upon alternating UV and visible irradiation enables light‐programmable optoelectronic devices.
Sewon Park   +8 more
wiley   +1 more source

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

open access: yes, 2019
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.
Surroca, Andrea, Bosser, Vincent
core  

On the resolution of index form equations in biquadratic number fields, II

open access: yes, 1991
Combining Baker's effective method with the reduction procedure of Baker and Davenport, we give an algorithm for the complete resolution of index form equations corresponding to totally real cyclic biquadratic number fields.
M. Pohst   +5 more
core   +1 more source

Spectrally Encoded Proximity‐Field Nanopatterning

open access: yesAdvanced Optical Materials, EarlyView.
Spectrally encoded proximity‐field nanopatterning (SEPN) enables continuous control of the out‐of‐plane periodicity of 3D photonic crystals by tuning the exposure wavelength while maintaining a fixed in‐plane period. This decouples near‐infrared reflectance from visible iridescence and allows fabrication of integrated multipattern devices with ...
Junhyung Park   +6 more
wiley   +1 more source

Multi‐Dielectric Metasurfaces for Ultrabright, Tunable Structural Color and Reconfigurable Optical Filtering with Extraordinarily Large Color Span

open access: yesAdvanced Optical Materials, EarlyView.
Structural color generation is an emerging field for digital display and printing applications. This report presents a novel truncated‐cone design and the first use of GaP sandwiched between two layers of TiO2, demonstrating ultra‐bright, tunable colors with a record color gamut.
Md Rumon Miah   +2 more
wiley   +1 more source

Chip‐Integrated Metasurface‐GaAsSb Nanowire Array Photodetectors for Single‐Pixel Polarimetric Imaging

open access: yesAdvanced Optical Materials, EarlyView.
A 2×2 multiplexed GaAsSb nanowire photodetector array integrated with L‐shaped metasurfaces is developed for miniaturized infrared polarimetry. Leveraging non‐radiating anapole states that facilitate near‐field enhancement, the device demonstrates strong polarization selectivity at 835 nm.
Longsibo Huang   +14 more
wiley   +1 more source

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