Results 51 to 60 of about 856,677 (287)

Estimation of phytoplankton concentration from downwelling irradiance measurements in water [PDF]

, 2012
The downwelling irradiance spectrum is so far not used directly for the determination of water constituents, mainly due to the large and unpredictable fluctuations of the underwater light field induced by the water surface.
Gege, Peter
core   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

Simulation and Sensitivity Analysis of Remote Sensing Reflectance for Optically Shallow Water Bathymetry

Remote Sensing
Optically shallow waters (OSW) enable water depth retrieval through passive optical remote sensing, benefiting from the relatively low attenuation of the water column.
Enze Wang, Huaguo Zhang, Juan Wang, Wenting Cao, Dongling Li   +4 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source

Simple instrument for the chracterization of diffuse reflectance [PDF]

, 1999
An apparatus for the measurement ofthe radial dependence ofthe continuous-wave diffuse reflectance ofa tissue is described. It consists in a probe, which is applied on the tissue, and a detection unit.
Andrea Gelmetti, Loconte, L, Lago, P, Guizzetti, G, Guizzetti, Giovanni G., Paolo Lago, Giardini, Mario E., Gelmetti, A, Guizzetti, Giovanni Guidoi, Laura Loconte, Lago, Paolo, Giardini, Mario Ettore, Giardini, M E, Guizzetti, Giovanni, Giardini, Mario Ettore; id_orcid, Gelmetti, Andrea, Loconte, Laura, Mario E. Giardini, Giovanni G. Guizzetti   +18 more
core   +3 more sources

Ground-Independent UAV Quantitative Mapping and In Situ Experimental Validation for Coral Reef Habitats

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Optically shallow waters, which host ecosystems like coral reefs, are characterized by complex radiative transfer pathways. Surface reflectance derived from remote sensing in optically shallow waters is influenced by water depth, water quality, and ...
Enze Wang, Huaguo Zhang, Yunhan Ma, Han Tong, Juan Wang, Wenting Cao, Dongling Li   +6 more
doaj   +1 more source

In situ hyperspectral characteristics and the discriminative ability of remote sensing to coral species in the South China Sea

GIScience & Remote Sensing, 2022
Knowledge about the optical features of benthic objects is essential for quantifying spectral signatures, remote sensing-based mapping, and ecological monitoring in coral reefs.
Kai Zeng, Zhantang Xu, Yuezhong Yang, Yongming Liu, Hongwuyi Zhao, Yu Zhang, Baicheng Xie, Wen Zhou, Cai Li, Wenxi Cao   +9 more
doaj   +1 more source

Reflection of Pulses from the Ocean Bottom [PDF]

The Journal of the Acoustical Society of America, 1961
The macroscopic physical properties of the ocean bottom have received considerable attention in recent years. Two important points of view which serve as motivation for such studies are acoustical and geological in nature. Experimental records of explosion pulses were obtained before and after reflection from the relatively smooth and level Hatteras ...
openaire   +1 more source

Chiral separation of chloroalkanes with the chromatographic column onboard Martian rovers

FEBS Letters, EarlyView.
Computer image of the Rosalind Franklin Rover of ESA's ExoMars mission. ExoMars is scheduled to land on planet Mars in Oxia Planum in 2029. This area represents an interesting spot to look for biosignatures. Investigations of ExoMars include measurement on molecular chirality. We show that chiral chloroalkanes, that have been identified on Mars, can be
Asma Merzougui, Agnes Banreti, Armelle L. Ernst, Guillaume Leseigneur, Uwe J. Meierhenrich   +4 more
wiley   +1 more source

RNA‐related functions of BRCA2 in transcription, replication, and genome stability

FEBS Letters, EarlyView.
Beyond its role in homologous recombination, BRCA2 regulates R‐loop homeostasis, DNA–RNA hybrid resolution, RNA polymerase II dynamics, and transcriptional activation. Disruption of any of these functions can contribute to genome instability, inflammatory signaling, and tumorigenesis. BRCA2 is a central tumor suppressor protein best known for its roles
Lucia Alvaro‐Aranda, Sreerama Chaitanya Sridhara, Aura Carreira   +2 more
wiley   +1 more source