Results 131 to 140 of about 11,595,150 (357)

Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function

FEBS Open Bio, EarlyView.
We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke, Michal Banasik, Rokas Juodeikis, Martin J. Warren, Richard W. Pickersgill   +4 more
wiley   +1 more source

Usefulness of optical enhancement endoscopy combined with magnification to improve detection of intestinal metaplasia in the stomach. [PDF]

Endosc Int Open, 2022
Sobrino-Cossío S, Teramoto-Matsubara O, Emura F, Araya R, Arantes V, Galvis-García ES, Meza-Caballero M, García-Aguilar BS, Reding-Bernal A, Uedo N.   +9 more
europepmc   +1 more source

Optomechanical nonlinearity enhanced optical sensors

Optics Express, 2015
We propose and investigate an ultra-sensitive optical sensor system based on optomechanically induced nonlinear effects in high-Q optical resonators. In both dispersive and dissipative optomechanical systems, a positive feedback is formed between the optical resonance frequency and the mechanical displacement, which results in nonlinear transmission ...
Jiahua, Fan, Chenguang, Huang, Lin, Zhu
openaire   +2 more sources

Derivation and characterization of retinal pigment epithelium from urine‐derived iPSCs

FEBS Open Bio, EarlyView.
Age‐related macular degeneration causes vision loss via RPE dysfunction and loss. Traditional iPSC therapies rely on invasive biopsies, limiting scalability. Here, we utilize urine‐derived stem cells as an accessible source to generate u‐iPSCs, successfully differentiated into pigmented RPE. This “Urine‐to‐Retina” platform provides a promising path for
Daniella Beiner, Hainan Zhu, Carol Christine Bosholm, Heuy‐Ching Wang, Tracy Criswell, Anthony Atala, Jian‐Xing Ma, Yuanyuan Zhang   +7 more
wiley   +1 more source

External cavity mode structure of a two-mode VCSEL subject to optical feedback

, 2007
We consider a multi-transverse-mode vertical-cavity surface-emitting laser (VCSEL) subject to optical feedback. The system is modeled by a partial differential equation for the spatial carrier population, which is coupled to delay differential equations ...
Green, K, Krauskopf, B., Lenstra, D., Green, K., Lenstra, D, Krauskopf, B   +5 more
core   +1 more source

Enhancing photovoltaic performance of organic solar cells by embedding plasmonic Ag nanocuboid array in the active layer

AIP Advances
This paper presents a method to enhance the light absorption and power conversion efficiency of organic solar cells (OSCs) by embedding a plasmonic Ag nanocuboid array into the active layer.
Jinxin Zhou, Fuhao Gao, Haitao Xu, Yongbing Long   +3 more
doaj   +1 more source

A surface-enhanced Raman scattering (SERS)-active optical fiber sensor based on a three-dimensional sensing layer

Sensing and Bio-Sensing Research, 2014
To fabricate a new surface-enhanced Raman scattering (SERS)-active optical fiber sensor, the design and preparation of SERS-active sensing layer is one of important topics.
Chunyu Liu, Shaoyan Wang, Gang Chen, Shuping Xu, Qiong Jia, Ji Zhou, Weiqing Xu   +6 more
doaj   +1 more source

Application of deep learning in the real-time diagnosis of gastric lesion based on magnifying optical enhancement videos. [PDF]

Front Oncol, 2022
Ma M, Li Z, Yu T, Liu G, Ji R, Li G, Guo Z, Wang L, Qi Q, Yang X, Qu J, Wang X, Zuo X, Ren H, Li Y.   +14 more
europepmc   +1 more source

Sudden anaerobization in Amphibacillus xylanus increases intracellular labile ferrous iron and inhibits cell growth

FEBS Open Bio, EarlyView.
Abruptly changing from aerobic to anaerobic conditions (sudden anaerobization) induced growth inhibition and a significant increase in intracellular labile ferrous iron in the aerotolerant anaerobe Amphibacillus xylanus. We found that free flavins mediate efficient electron transfer from NADH to ferric iron under anaerobic conditions, suggesting that ...
Shinya Kimata, Yoichi Sakai, Keisuke Tanaka, Etsuro Yoshimura, Ken Kitano, Morio Ishikawa, Tadahiro Nakamoto, Tsutomu Takayama, Hirofumi Inoue, Kaho Nomura, Tomonori Suzuki, Masataka Uchino, Akira Abe, Youichi Niimura   +13 more
wiley   +1 more source

Noise suppression of incoherent light using a gain-saturated SOA: implications for spectrum-sliced WDM systems [PDF]

, 2005
In this paper, we present an experimental and numerical study of semiconductor optical amplifier (SOA)-based noise suppression and its relevance to high-channel-density spectrum sliced wavelength-division-multiplexed systems. We show that the improvement
Ibsen, M, Thomsen, Benn C., David J. Richardson, Horak, Peter, Ibsen, Morten, Richardson, David J., Thomsen, BC, Richardson, DJ, Anoma D. Mccoy, Morten Ibsen, McCoy, Anoma D., Benn C. Thomsen, Peter Horak, McCoy, AD, Horak, P   +14 more
core   +1 more source