Results 71 to 80 of about 2,736 (189)

Low-cost luminescence lifetime system for medical diagnostics

JPhys Photonics
Luminescence lifetimes provide insights into the local microenvironment of luminescent molecules, enabling precise measurements that can be leveraged for biomedical imaging and sensing applications.
Lakhvir Singh, Melody Yeh, Linghao Hu, Brian Ko, Michael J McShane, Alex J Walsh   +5 more
doaj   +1 more source

Inhibition of Oxidative Phosphorylation Reverses Bone Marrow Hypoxia Visualized in Imageable Syngeneic B-ALL Mouse Model

Frontiers in Oncology, 2020
Abnormally low level of interstitial oxygen, or hypoxia, is a hallmark of tumor microenvironment and a known promoter of cancer chemoresistance. Inside a solid tumor mass, the hypoxia stems largely from inadequate supply of oxygenated blood through ...
Mateusz Rytelewski, Karine Harutyunyan, Natalia Baran, Saradhi Mallampati, M. Anna Zal, M. Anna Zal, Antonio Cavazos, Jason M. Butler, Sergej Konoplev, Mirna El Khatib, Shane Plunkett, Joseph R. Marszalek, Michael Andreeff, Tomasz Zal, Tomasz Zal, Marina Konopleva   +15 more
doaj   +1 more source

Lifetime imaging of singlet oxygen NIR phosphorescence

Abstract 1O2 is the first excited state of molecular oxygen and the key intermediate in photosensitized oxidation reactions. It is sensed by its near-infrared (NIR) phosphorescence emission that peaks at 1270 nm. However, several intrinsic properties of the 1O2 emission, such as the very low yield of photon emission, the comparable rates for ...
Mauricio Baptista, Isabel Bacellar, Carlos Marques, André Schroder, Carolina Santacruz-Perez, Helena Junqueira, Paolo Di Mascio   +6 more
openaire   +1 more source

A Method for Optical Quantification of Local Oxygen Limitations in Multiphase Bioreactors

Biotechnology and Bioengineering, EarlyView.
ABSTRACT Spatial oxygen limitation is a major source of physiological stress and metabolic, scale‐dependent heterogeneity in aerobic bioprocesses. In gas‐liquid stirred tank reactors, oxygen availability is governed by hydrodynamics and mass transfer and is therefore inherently non‐uniform.
Ryan Rautenbach, Katharina Zörner, Jonas Barczyk, Marko Hoffmann, Ralf Takors, Michael Schlüter   +5 more
wiley   +1 more source

Asymmetric Diphosphane Dioxides With A–π–A–π’–D Scaffolds for High‐Purity Deep‐Blue Luminescence

Chemistry – A European Journal, EarlyView.
Diphosphane dioxide‐based luminophores with donor–π–acceptor– π’–acceptor scaffold enable efficient deep‐blue emission from tunable charge‐transfer states affording high photoluminescence up to 95%. OLEDs reach EQE 4.9%, aided by triplet–triplet annihilation, highlighting a practical route to high‐performance blue emitters.
Eetu Hakkarainen, Zong‐Ying Liu, Jhon Sebastian Oviedo Ortiz, Nicolas Vanthuyne, Jeanne Crassous, Ondřej Mrózek, Fabien B. L. Cougnon, Wen‐Yi Hung, Pi‐Tai Chou, Igor O. Koshevoy, Andrey Belyaev   +10 more
wiley   +1 more source

Three-dimensional oxygen concentration monitoring in hydrogels using low-cost phosphorescence lifetime imaging for tissue engineering. [PDF]

Biomed Opt Express, 2023
Mei X, Fang Q, Selvaganapathy PR.
europepmc   +1 more source

Lanthanide Centered and Circular Polarized Luminescence (CPL) From Tb(III) Complexes Made From Structurally Simple Methoxy‐Phenyl and Phenol‐Derived Pyridyldiamide (pda) Ligands

Chemistry – A European Journal, EarlyView.
The development of chiral pda derived methoxy ligands L1a [1(R,R)] and L1b [1(S,S)], along with their phenol derivatives L2a [2(R,R)] and L2b [2(S,S)], and their respective Tb(III) complexes is described. These Tb‐complexes exhibited Tb(III)‐centered emission upon and their chiroptical properties were probed by using both CD and CPL spectroscopy ...
Jennifer E. Jones, Jonathan A. Kitchen, Robert D. Peacock, Thorfinnur Gunnlaugsson   +3 more
wiley   +1 more source

Monitoring the Intracellular pH and Metabolic State of Cancer Cells in Response to Chemotherapy Using a Combination of Phosphorescence Lifetime Imaging Microscopy and Fluorescence Lifetime Imaging Microscopy. [PDF]

Int J Mol Sci, 2023
Druzhkova I, Komarova A, Nikonova E, Baigildin V, Mozherov A, Shakirova Y, Lisitsa U, Shcheslavskiy V, Ignatova N, Shirshin E, Shirmanova M, Tunik S.   +11 more
europepmc   +1 more source

Gas–Solid Interface‐Assisted Growth of Organic Semiconductor Single Crystals: Dimensions, Structures, Mechanisms, and Applications

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Gas–solid interface‐assisted growth strategies have unlocked precise control over crystal structure, morphology, dimension, and molecular packing. The obtained organic semiconductor single crystals represent the ideal candidates for high‐performance organic optoelectronic devices.
Tingyi Yan, Qing Tian, Jinwen Wang, Ke Jiang, Yage Han, Yuanzhuang Ren, Lingyun Li, Xiujuan Zhang, Jiansheng Jie   +8 more
wiley   +1 more source

Flexible white thermally activated delayed fluorescence polymer with alkyl spacer and side‐chain encapsulation for efficient solution‐processed white organic light‐emitting diodes

FlexMat, EarlyView.
A “gemstone‐necklace” FASCE strategy synthesizes single‐component white polymers (PTF‐Qx) by alternating rigid TADF units with flexible alkyl chains. The non‐doped rigid device achieves a high EQE of 15.66% with stable white emission (CIE: 0.36, 0.46).
Wenhao Zhang, Hongyu Zhuang, Xinxin Ban, Shilong Feng, Tao Xu, Youqiang Qian, Shun Hu, Aiyun Zhu   +7 more
wiley   +1 more source