Results 31 to 40 of about 403,277 (275)

Comparison of label‐free and label‐based approaches for surface‐enhanced Raman microscopic imaging of bacteria cells

open access: yesAnalytical Science Advances, 2020
Surface‐enhanced Raman spectroscopic (SERS) approaches are emerging for bacteria analysis whereby bacteria cells can be measured based on their biochemical composition (label‐free) or with the aid of a chemical label to enhance the SERS signal. Combining
Michael E. Hickey, Siyue Gao, Lili He
doaj   +1 more source

Hyperspectral Imaging with Stimulated Raman Scattering by Chirped Femtosecond Lasers [PDF]

open access: yes, 2013
Raman microscopy is a quantitative, label-free, and noninvasive optical imaging technique for studying inhomogeneous systems. However, the feebleness of Raman scattering significantly limits the use of Raman microscopy to low time resolutions and ...
Freudiger, Christian Wilhelm   +4 more
core   +1 more source

Remote-mode microsphere nano-imaging: new boundaries for optical microscopes

open access: yesOpto-Electronic Advances, 2018
Optical microscope is one of the most popular characterization techniques for general purposes in many fields. It is distinguished from the vacuum or tip-based imaging techniques for its flexibility, low cost, and fast speed.
Chen Lianwei   +3 more
doaj   +1 more source

Label-Free Macroscopic Fluorescence Lifetime Imaging of Brain Tumors

open access: yesFrontiers in Oncology, 2021
Advanced stage glioma is the most aggressive form of malignant brain tumors with a short survival time. Real-time pathology assisted, or image guided surgical procedures that eliminate tumors promise to improve the clinical outcome and prolong the lives ...
Maria Lukina   +14 more
doaj   +1 more source

Highly sensitive and label-free digital detection of whole cell E. coli with interferometric reflectance imaging [PDF]

open access: yes, 2019
Bacterial infectious diseases are a major threat to human health. Timely and sensitive pathogenic bacteria detection is crucial in identifying the bacterial contaminations and preventing the spread of infectious diseases.
Bhuiya, Abdul Muyeed   +8 more
core   +2 more sources

Label Free Fluorescence Lifetime FRET Imaging [PDF]

open access: yesBiophysical Journal, 2013
Multiphoton microscopy with endogenous contrasts in biological tissues have primarily focused on detecting signals from the reduced nicotinamide adenine dinucleatide (NADH), its dinucleatide phosphate (NADPH), riboflavins, and tryptophan. All these fluorophores have emission in the wavelength range of 400-600 nm.
Jyothikumar, Vinod   +2 more
openaire   +1 more source

Label-Free Prediction of Cell Painting from Brightfield Images [PDF]

open access: yesScientific Reports, 2021
ABSTRACTCell Painting is a high-content image-based assay which can reveal rich cellular morphology and is applied in drug discovery to predict bioactivity, assess toxicity and understand diverse mechanisms of action of chemical and genetic perturbations.
Jan Cross-Zamirski   +5 more
openaire   +5 more sources

Label-free detection of anticancer drug paclitaxel in living cells by confocal Raman microscopy [PDF]

open access: yes, 2013
Confocal Raman microscopy, a non-invasive, label-free, and high spatial resolution imaging technique is employed to trace the anticancer drug paclitaxel in living Michigan Cancer Foundation-7 (MCF-7) cells. The Raman images were treated by K-mean cluster
A.-G. Vegh   +9 more
core   +4 more sources

Label-Free Nanometer-Resolution Imaging of Biological Architectures through Surface Enhanced Raman Scattering [PDF]

open access: yes, 2013
Label free imaging of the chemical environment of biological specimens would readily bridge the supramolecular and the cellular scales, if a chemical fingerprint technique such as Raman scattering can be coupled with super resolution imaging.
Ayas, S   +14 more
core   +2 more sources

Three-dimensional forward-scattering imaging flow cytometry system for single-cell analysis [PDF]

open access: yesAPL Photonics
Label-free single-cell 3D imaging is essential for accurate phenotyping by minimizing perturbations to native cellular states and facilitating downstream molecular analyses.
Yu-Hwa Lo   +7 more
doaj   +1 more source

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