Results 41 to 50 of about 216,243 (209)

From Handmills to Windmills: Technology Gatekeeping in Medieval Europe and Contemporary Ontario

open access: yesNew Proposals, 2012
A commentary on the power of propertied classes and labour aristocracies in relation to the propagation of sustainable energy.
Dennis Alan Bartels
doaj  

Molecular and Mechanistic Characterization of PddB, the First PLP-Independent 2,4-Diaminobutyric Acid Racemase Discovered in an Actinobacterial D-Amino Acid Homopolymer Biosynthesis

open access: yesFrontiers in Microbiology, 2021
We recently disclosed that the biosynthesis of antiviral γ-poly-D-2,4-diaminobutyric acid (poly-D-Dab) in Streptoalloteichus hindustanus involves an unprecedented cofactor independent stereoinversion of Dab catalyzed by PddB, which shows weak homology to
Kazuya Yamanaka   +5 more
doaj   +1 more source

Kinetic approach to evaluate the effects of 3,3'-diaminobenzidine on N mineralization in soils

open access: yesPlant, Soil and Environment, 2010
It has been demonstrated that azo dyes, the xenobiotics widely use in industries, can pose threats to public health. 3,3'-diaminobenzidine (DAB), as a benzidine analogue, is generated from reduction of azo dyes by intestinal or environmental ...
B. Jalili, F. Nourbakhsh, M. Ghiasi
doaj   +1 more source

The Invisible Behmoth: The Moral Legacy of the Cold War

open access: yesNew Proposals, 2008
A comment on the moral outcome of the cold war.
Dennis Alan Bartels
doaj  

Diskreta ljud: om DAB som radio

open access: yesMedieKultur: Journal of Media and Communication Research, 2001
Er DAB (Digital Audio Broadcast) den revolution af radiomediet som det ofte er blevet påstået? I sin analyse af DAB forholder Carin Åberg sig kritisk til den måde DAB og det europæiske forskningsprojekt i di- gital distributionsteknik EUREKA-147 har
Carin Åberg
doaj   +3 more sources

Synthesis of propenone-linked covalent organic frameworks via Claisen-Schmidt reaction for photocatalytic removal of uranium

open access: yesNature Communications, 2023
The type of reactions and the availability of monomers for the synthesis of sp 2 -c linked covalent organic frameworks (COFs) are considerably limited by the irreversibility of the C=C bond.
Cheng-Peng Niu   +4 more
doaj   +1 more source

Analytical modelling and power density optimisation of a single phase dual active bridge for aircraft application

open access: yesThe Journal of Engineering, 2019
A design procedure for the dual active bridge (DAB) converter is presented, which aims to optimised power density and computational effort. When designing a DAB, the selection of circuit design parameters such as switching frequency, leakage inductance ...
Niklas Fritz   +4 more
doaj   +1 more source

A Unified Dual Active Bridge Model Based on Improved Extended Describing Function With Dead Time Compensation for Electric Vehicles

open access: yesIEEE Access
Dual active bridge (DAB) converter is well suited for deriving a high-power density plug-in hybrid electric vehicle charger. In this case, various DAB operation modes have to be considered, but few papers have established a unified DAB model.
Deshu Zhang, Houji Li, Jie Chen
doaj   +1 more source

Frequency-domain-based complete loss model for 10 kV/1 MW solid-state transformer

open access: yesThe Journal of Engineering, 2019
This study proposes a frequency-domain-based loss model for dual active bridge (DAB) inside modular multi-level cascaded solid-state transformer (SST). Previously, the loss model is mainly derived in the time domain and requires enormous modelling effort.
Tao Liu   +6 more
doaj   +1 more source

Inhibition of glycogen phosphorylase stimulates ventromedial hypothalamic nucleus AMP‐activated protein kinase

open access: yesPhysiological Reports, 2017
The glucose polymer glycogen is a vital fuel reserve in the brain. The mediobasal hypothalamic energy sensor AMP‐activated protein kinase (AMPK) maintains glucostasis via neurotransmitter mechanisms that suppress [γ‐aminobutyric acid; GABA] or stimulate [
Hussain N. Alhamami   +2 more
doaj   +1 more source

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