Results 81 to 90 of about 2,732,119 (301)

Development and deployment of an in situ sensor for seawater pH based on the spectrophotometric method

open access: yes, 2013
The uptake of anthropogenic CO2 by the oceans since the onset of the industrial revolution is considered to be a serious challenge to marine ecosystems due to ensuing carbonate chemistry changes (ocean acidification).
Rerolle, Victoire
core   +1 more source

Structural and biochemical analysis of a B12 superbinder

open access: yesFEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices   +3 more
wiley   +1 more source

New planar trace humidity sensor [PDF]

open access: yes, 2012
A new planar sensor element for continuous coulometric trace humidity measurements in industrial gases has been developed. In order to ensure precise measurements a calibration facility including a precision dew point hygrometer as a reference device ...
Andreas Lorek   +9 more
core   +1 more source

Monitoring food quality using sensor technology from harvest to home [PDF]

open access: yes, 2005
A food quality sensor is a device that responds to some property associated with food quality and transforms the response into a signal (1). This signal may provide direct information about the quality factor to be measured or may have a known ...
Frisby, June
core   +2 more sources

Battery-Less NFC Sensor for pH Monitoring

open access: yesIEEE Access, 2019
In this paper, we present a low-cost battery-less color sensor based on Near Field Communication (NFC). This system consists of a color sensor connected to a low-power microcontroller connected to an NFC chip. The energy needed to power up the chipset is
Marti Boada   +3 more
doaj   +1 more source

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

open access: yesFEBS 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   +2 more
wiley   +1 more source

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

open access: yesFEBS 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   +6 more
wiley   +1 more source

pH-Regulated Terbium(III) Infinite Coordination Polymer Sensor Array for Pattern Discrimination of Quinolone Antibiotics

open access: yes, 2022
In this study, dual-ligand lanthanide metal–organic infinite coordination polymer (BDC-NH2-Tb-AMP ICPs) with dual fluorescence emission was constructed.
Ruixuan Hu (13906348)   +4 more
core   +1 more source

Design of IoT-Based Smart Hydroponic Farming with Solar Energy for Sustainable and Precision Crop Production

open access: yesJournal of Electrical Engineering and Computer Sciences
Conventional hydroponic farming systems frequently encounter limitations related to unstable environmental control, suboptimal nutrient management, and strong dependence on grid-based electricity, which collectively hinder their sustainability and ...
Monika Faswia Fahmi   +2 more
doaj   +1 more source

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

open access: yesFEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil   +3 more
wiley   +1 more source

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