Results 51 to 60 of about 550,548 (338)

Scanning magnetic field microscope with a diamond single-spin sensor [PDF]

open access: yesAppl. Phys. Lett. 92, 243111 (2008), 2008
We describe a scanning device where a single spin is used as an ultrasensitive, nanoscale magnetic field sensor. As this "probe spin" we consider a single nitrogen-vacancy defect center in a diamond nanocrystal, attached to the tip of the scanning device.
arxiv   +1 more source

Activation of SIRT1 Reduces Renal Tubular Epithelial Cells Fibrosis in Hypoxia Through SIRT1‐FoxO1‐FoxO3‐Autophagy Pathway

open access: yesAdvanced Biology, EarlyView.
Hypoxia promotes the epithelial‐mesenchymal transition (EMT) of renal tubular epithelial cells via the SIRT1‐FoxO1‐FoxO3‐autophagy pathway, thereby resulting in the fibrosis of renal tubular epithelial cells. Activation of SIRT1 or induction of autophagy inhibits this process, alleviating hypoxia‐induced fibrosis.
Guangyu Wang   +6 more
wiley   +1 more source

Scanning electron microscope studies of Avena coleoptiles during primary leaf emergence

open access: yesActa Societatis Botanicorum Poloniae, 2014
A scanning electron microscope study of the fine structure of coleoptiles of Avena sativa L. cv. Clintford has revealed information about the relationship between aspects of coleoptilar structure and the emergence of the primary leaf. Stomata are located
Norman R. Dollahon   +3 more
doaj   +1 more source

Combined scanning force microscopy and scanning tunneling spectroscopy of an electronic nano-circuit at very low temperature [PDF]

open access: yesApplied Physics Letters 90 (22/01/2007) 043114, 2006
We demonstrate the combination of scanning force microscopy and scanning tunneling spectroscopy in a local probe microscope operating at very low temperature (60 mK). This local probe uses a quartz tuning fork ensuring high tunnel junction stability. We performed the spatially-resolved spectroscopic study of a superconducting nano-circuit patterned on ...
arxiv   +1 more source

RhoA and Rac1 as Mechanotransduction Mediators in Colorectal Cancer

open access: yesAdvanced Biology, EarlyView.
Analysing RhoA and Rac1 protein levels in Colorectal cancer (CRC) samples under mechanical strain highlights their potential as diagnostic markers. Monitoring their activity could offer valuable insights into how cancer spreads, paving the way for new approaches to better understand and diagnose colorectal cancer.
Sharda Yadav   +5 more
wiley   +1 more source

Low Temperature Nanoscale Electronic Transport on the MoS_2 surface [PDF]

open access: yes, 2013
Two-probe electronic transport measurements on a Molybdenum Disulphide (MoS_2) surface were performed at low temperature (30K) under ultra-high vacuum conditions. Two scanning tunneling microscope tips were precisely positioned in tunneling contact to measure the surface current-voltage characteristics.
arxiv   +1 more source

Novel Biologically Active Glass Fiber Functionalized Using Magnesium Phosphate Cement Promotes Bone and Vascular Regeneration

open access: yesAdvanced Biology, EarlyView.
In this study, a new type of bioactive glass fiber ‐based composite magnesium phosphate bone cement is prepared and verified that its mechanical strength and biological properties. In addition, the cement may have played a biologically active role in the Notch and HIF signaling pathways.
Yuzheng Lu   +12 more
wiley   +1 more source

Analysis of Electromagnetic Interference Effect on Semiconductor Scanning Electron Microscope Image Distortion

open access: yesApplied Sciences, 2023
Most electronic devices are susceptible to electromagnetic interference (EMI); thus, it is necessary to recognize and identify the cause and effect of EMI as it can corrupt electronic signals and degrade equipment performance.
You-Jin Park   +2 more
doaj   +1 more source

A Scanning Probe Microscope in My Scanning Electron Microscope? [PDF]

open access: yesMicroscopy Today, 1995
Abstract Scanning probe microscopes (SPMs) designed to fit into scanning elec- tron microscopes (SEMs) are now becoming commercially available and you might ask, "Why would I want to put an SPM in my SEM"? The primary reason is that the too forms of microscope are very complimentary. Each microscope extends the power of the other.
openaire   +2 more sources

Joint non-rigid image registration and reconstruction for quantitative atomic resolution scanning transmission electron microscopy [PDF]

open access: yesUltramicroscopy, 198:49-57, March 2019, 2019
Aberration corrected scanning transmission electron microscopes (STEM) enable to determine local strain fields, composition and bonding states at atomic resolution. The precision to locate atomic columns is often obstructed by scan artifacts limiting the quantitative interpretation of STEM datasets.
arxiv   +1 more source

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