Results 31 to 40 of about 90,088 (87)

Nano-Polyoxotungstate [Cu20P8W48] Immobilized on Magnetic Nanoparticles as an Excellent Heterogeneous Catalyst Nanoreactors for Green Reduction of Nitrophenol Compounds

open access: yesJournal of Spectroscopy, 2022
In this study, Cu20-polyoxotungstate [Cu20Cl(OH)24(H2O)12(P8W48O184)]25− supported on a magnetic substrate was used as a high-performance green method for the reduction of nitrophenol compounds such as 4-nitrophenol (4-NP) and 2,4,6-trinitrophenol (2,4,6-
Reza Haddad, Ali Roostaie
doaj   +1 more source

Numerical Investigation on the Performance Enhancement of InGaN/GaN Light-Emitting Diodes with a Novel p-i-n Electron-Blocking Layer

open access: yesInternational Journal of Optics
In this study, we propose a novel p-i-n AlGaN electron-blocking layer for GaN-based LEDs. The aim is to enhance the confinement of electrons and improve the efficiency of hole injection, ultimately resulting in a significant enhancement in LED ...
Jun Wang, Tian Wang
doaj   +1 more source

Heat-Activated Persulfate Oxidation of Chlorinated Solvents in Sandy Soil

open access: yesJournal of Spectroscopy, 2014
Heat-activated persulfate oxidative treatment of chlorinated organic solvents containing chlorinated ethenes and ethanes in soil was investigated with different persulfate dosages (20 g/L, 40 g/L, and 60 g/L) and different temperatures (30°C, 40°C, and ...
Jialu Liu   +4 more
doaj   +1 more source

(Table 1) Species abundance at DSDP Hole 63-467

open access: yes, 1981
Neogene palynofloras of southern California have been all too infrequently studied. Previous investigations of Pacific Coast sediments have been largely restricted to Pacific Northwest locales.
Robert A Ballog (6886724)   +3 more
core   +1 more source

Anthracene Fluorescence Quenching by a Tetrakis (Ketocarboxamide) Cavitand

open access: yesJournal of Spectroscopy, 2014
Quenching of both fluorescence lifetime and fluorescence intensity of anthracene was investigated in the presence of a newly derived tetrakis (ketocarboxamide) cavitand at various concentrations.
Tibor Zoltan Janosi   +5 more
doaj   +1 more source

Fluorescence Enhancement Factors on Optical Antennas: Enlarging the Experimental Values without Changing the Antenna Design

open access: yesInternational Journal of Optics, 2012
Plasmonic antennas offer promising opportunities to control the emission of quantum objects. As a consequence, the fluorescence enhancement factor is widely used as a figure of merit for a practical antenna realization.
Jérôme Wenger
doaj   +1 more source

Performance Comparison of Wavefront-Sensorless Adaptive Optics Systems by Using of the Focal Plane

open access: yesInternational Journal of Optics, 2015
The correction capability and the convergence speed of the wavefront-sensorless adaptive optics (AO) system are compared based on two different system control algorithms, which both use the information of focal plane.
Huizhen Yang, Zhen Zhang, Jian Wu
doaj   +1 more source

A Folha, Ano 9, Número 467

open access: yes, 1981
Folheto publicado pela Cúria Diocesana de Nova Iguaçu de 1977 a 1984 com foco nas questões políticas e sociais que afetavam a vida dos habitantes da Baixada Fluminense, a partir da perspectiva da doutrina Cristã. | Manchete do n.467 "Reino, mundo, igreja?
Hipólyto, Dom Adriano Mandarino
core  

Spectrophotometric Determination of Iron(II) after Solid Phase Extraction of Its 2,2′ Bipyridine Complex on Silica Gel-Polyethylene Glycol

open access: yesJournal of Spectroscopy, 2013
A new solid phase extraction procedure was developed for preconcentration of iron(II) using silica gel-polyethylene glycol (silica-PEG) as an adsorbent. The method is based on retention of iron(II) as 2,2′ bipyridine complex on silica-PEG.
Nahid Pourreza   +3 more
doaj   +1 more source

The Clinical Application of Raman Spectroscopy for Breast Cancer Detection

open access: yesJournal of Spectroscopy, 2017
Raman spectroscopy has been widely used as an important clinical tool for real-time in vivo cancer diagnosis. Raman information can be obtained from whole organisms and tissues, at the cellular level and at the biomolecular level.
Pin Gao   +7 more
doaj   +1 more source

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