Results 81 to 90 of about 84,851 (322)

Sol–Gel Thin Films for the Protection of Ancient Glass Artifacts: A Performance Comparison Between Inorganic and Hybrid Silica Compositions

open access: yesAdvanced Materials Interfaces, EarlyView.
This study explores the development of sol–gel coatings for archaeological glass conservation. By formulating silica‐based solutions with low acid concentrations and applying them via dip coating, protective films are prepared at room temperature. Analysis reveals that hybrid coatings with methyl and octyl groups provide superior protection against ...
Stefano Centenaro   +5 more
wiley   +1 more source

Luminescence of Speleothems in Italian Gypsum Caves: Preliminary Report [PDF]

open access: yesarXiv, 2009
The luminescence of 3 speleothem samples from the Acquafredda karst system and 1 from the Novella Cave (Gessi Bolognesi Natural Park, Italy) has been recorded using excitation by impulse Xe- lamp. All these carbonate speleothems are believed to be formed only from active CO2 from the air, because the bedrock of the cave consist of gypsum and does not ...
arxiv  

Pickett's Cave [PDF]

open access: yesScientific American, 1881
n ...
openaire   +2 more sources

Biological and Mechanical Limitations for Chronic Fast‐Scan Cyclic Voltammetry Sensor Design

open access: yesAdvanced Materials Technologies, EarlyView.
Real‐time detection of neurochemicals has demonstrated value in the field of neuroscience. However, current methods have limitations for use in the chronic setting, which is often the ideal environment for research. This article discusses these limitations, as well as technologies that have been developed to overcome them, and provides recommendations ...
Mason L. Perillo   +6 more
wiley   +1 more source

A Conceptual Atomic Force Microscope using LEGO for Nanoscience Education

open access: yesInternational Journal of Automation and Smart Technology, 2014
A lack of effective educational materials is limited general public awareness of, and interest in, nanoscience. This paper presents a conceptual atomic force microscope (AFM) model built by using the LEGO® MINDSTORMS series.
Tsung-Han Hsieh   +4 more
doaj   +1 more source

Keloids: Current and emerging therapies

open access: yesScars, Burns & Healing, 2020
Keloids are pathological scars that grow over time and extend beyond the initial site of injury after impaired wound healing. These scars frequently recur and rarely regress. They are aesthetically disfiguring, can cause pain, itching, discomfort as well
Nkemcho Ojeh   +3 more
doaj   +1 more source

Large Bidirectional Refractive Index Change in Silicon‐rich Nitride via Visible Light Trimming

open access: yesAdvanced Optical Materials, EarlyView.
Continuous‐wave visible light trimming of PECVD silicon‐rich nitride micro‐ring resonators enables precise, large bidirectional refractive index tuning. Resonance shifts as fine as 10 pm are achieved with a cost‐effective setup, demonstrating large red shifts of 49.1 nm and blue shifts of 10.6 nm.
Dmitrii Belogolovskii   +8 more
wiley   +1 more source

The silent barrier: exploring data availability in Small Island Developing States

open access: yesRevista Panamericana de Salud Pública
Objective. To quantify three aspects of data-related developmental progress across 57 Small Island Developing States (SIDS) recognized by the United Nations: statistical capacity measured using the Statistical Performance Indicators (SPI), data ...
Ian Richard Hambleton, Selvi Jeyaseelan
doaj   +1 more source

Diabetes self-management and social support during the COVID-19 pandemic: Perspectives of older adults living in Barbados

open access: yesDialogues in Health, 2023
Purpose: Diabetes mellitus (diabetes) is a major health concern in Barbados. In 2013, the reported prevalence (18.7%) was double global levels, with diabetes accounting for 10.4% of total deaths in 2016.
Jamie Hinds   +2 more
doaj  

A Versatile Method for Nano‐Fabrication on Diamond Film: Flexible Diamond Metasurfaces as a Demonstration

open access: yesAdvanced Optical Materials, EarlyView.
A versatile, high‐precision, non‐contaminating sugar‐transferring method is developed for nanofabrication on newly developed ultrathin and flexible diamond films. It enables the flexible all‐diamond metasurfaces, for the first time, come into the public eyes.
Yicheng Wang   +10 more
wiley   +1 more source

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