Results 101 to 110 of about 642,509 (288)

Fault diagnosis method for transformers based on feature selection of dissolved gas in oil

电力工程技术
Dissolved gas analysis is important for the early warning and diagnosis of transformer faults. Aiming at the problems of numerous types of features for dissolved gas in oil and the insufficient analysis of fault associated features, a new fault diagnosis
LIAO Caibo, YANG Jinxin, HU Xiong, QIU Zhibin, LIU Xiaotian, ZHU Wenqing   +5 more
doaj   +1 more source

On-Line Analysis of Oil-Dissolved Gas in Power Transformers Using Fourier Transform Infrared Spectrometry

Energies, 2018
To address the problem of on-line dissolved gas analysis (DGA) of a power transformer, a Fourier transform infrared (FT-IR) spectrometer was used to develop an analysis instrument. Carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), ethane (C2H6),
Xiaojun Tang, Wenjing Wang, Xuliang Zhang, Erzhen Wang, Xuanjiannan Li   +4 more
doaj   +1 more source

The C23A system, an exmaple of quantitative control of plant growth associated with a data base [PDF]

The architecture of the C23A (Chambers de Culture Automatique en Atmosphere Artificielles) system for the controlled study of plant physiology is described. A modular plant growth chambers and associated instruments (I.R.
Andre, M., Daguenet, A., Gerbaud, A., Massimino, D.   +3 more
core   +1 more source

Factors affecting the activity of baker's compressed and active dry yeast : a thesis presented in partial fulfilment of the requirements for the degree of Master of Technology in Biotechnology at Massey University [PDF]

, 1980
Factors affecting the Activity of Baker's Compressed and Active Dry Yeast. Parameters important in the production of Baker's Yeast were correlated with the product's final activity.
Espie, Stephen Angus
core  

Copper‐based Materials for Photo and Electrocatalytic Process: Advancing Renewable Energy and Environmental Applications

Advanced Functional Materials, EarlyView.
Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida, Yanjie Wang, Thais A. Rodrigues, Paulo H. H. Nunes, Vagner R. de Mendonça, Paulo H. E. Falsetti, Leticia V. Savazi, Tao He, Alexandra V. Bardakova, Aida V. Rudakova, Jie Tian, Alexei V. Emeline, Osmando F. Lopes, Antonio Otavio T. Patrocínio, Jia Hong Pan, Caue Ribeiro, Detlef W. Bahnemann   +16 more
wiley   +1 more source

Where to perform the dissolved gas analysis?

Transformers Magazine, 2022
All the readers of Transformers Magazine and attendees of Transformer Academy already realize that DGA is one of the most comprehensive tests for oil-filled electrical devices. Also, readers well understand the complexity of these tests. This aspect is emphasized by all DGA standards, guides, and ample literature and research on DGA methodology.
openaire   +2 more sources

MnI‐Functionalized Covalent Organic Framework as Efficient Electrocatalyst for CO2 Reduction in a Catholyte‐Free Zero‐Gap Electrolyzer

Advanced Functional Materials, EarlyView.
This work demonstrates the successful integration of a phenanthroline‐based 2D COF with MnI catalytic sites into a catholyte‐free membrane‐electrode‐assembly cell for CO2 electroreduction. The crystalline COF actively suppresses Mn⁰–Mn⁰ dimerization, achieving a turnover frequency of 617 h⁻¹ at 2.8 V (full‐cell potential), and enabling stable operation.
Laura Spies, Marcos Eduardo G. Carmo, Gonçalves J. Marrenjo, Stephan Reuther, Patrick Ganswindt, Antonio Otavio T. Patrocinio, Thomas Bein, Osmando F. Lopes, Jenny Schneider   +8 more
wiley   +1 more source

A century of dissolved gas analysis - Part II

Transformers Magazine, 2019
Future brings some changes to DGA. It is expected that offline DGA in standard laboratories will gradually disappear as a routine test and transformers without online DGA will be tested by using simple portable devices. The online sensors will be monitored from a central control room with a sophisticated artificial intelligence in an effort to predict ...
openaire   +4 more sources

Quantifying precision and accuracy of measurements of dissolved inorganic carbon stable isotopic composition using continuous-flow isotope-ratio mass spectrometry [PDF]

, 2014
RATIONALE: We describe an analytical procedure that allows sample collection and measurement of carbon isotopic composition (δ13CV-PDB value) and dissolved inorganic carbon concentration, [DIC], in aqueous samples without further manipulation post field
Altman, AMCTB, Analytical Methods Committee, AMCTB, Analytical Methods Committee, Assayag, Atekwana, Barth, Bass, Bass, Bouillon, Brandes, Capasso, Cole, Finlay, Finlay, Geldern, Jones, Klein Gebbinck, Maberly, McCrea, Neter, Polsenaere, Salata, Soulsby, Spötl, St-Jean, Taipale, Torn, Torres, Waldron, Yang   +29 more
core   +1 more source

Copper Doping Enhances the Activity and Selectivity of Atomically Precise Ag44 Nanoclusters for Photocatalytic CO2 Reduction

Advanced Functional Materials, EarlyView.
By a simple anti‐Galvanic reaction, up to six copper atoms could be preferably doped into the Ag2(SR)5 staple motifs and Ag20 dodecahedral shell of an atomically precise Ag44(SR)30 nanocluster. When anatase TiO2 is used as substrate, the (AgCu)44/TiO2 photocatalyst exhibited much improved activity in photocatalytic CO2 reduction compared to Ag44/TiO2 ...
Ye Liu, Xi Zheng, Xiufan Liu, Tengyuan Gao, Nicola Pinna, Yu Wang   +5 more
wiley   +1 more source