, C.L. , Atta , M. , Bukhari , A. , Taisir , M. , Yusuf , A.M. & Idris , A. ( 2014 ): Enhancing growth and lipid production of marine microalgae for biodiesel production via the use of different LED wavelengths
In the photomicrocalorimetric module designed by Johansson and Wadsö for a commercial Thermometric TAM heat conduction batch
microcalorimeter, the incident light from an external xenon lamp was divided by a beam splitter and directed to the two vessels
of the differential system by light guides ideally to give zero heat flow. In practice this proved difficult and so to improve
the balance between the vessels in terms of the incident light heat output as well as potentially to give more versatility
regarding the choice of wavelengths, the xenon lamp-based system was replaced in the first stage by a pair of cold white LEDs
embedded directly in the test and reference vessels. The LEDs had independent electrical circuits to achieve the balance by
manual adjustment. As a second stage, the test vessel was equipped with PTFE tubing for changing the liquid phase in it while
it was in the middle thermal equilibrium position. This improved the reproducibility of the results.
Authors:S. X. S. Costa, M. R. Galvão, D. P. Jacomassi, M. I. B. Bernardi, A. C. Hernandes, A. N. de Souza Rastelli and M. F. Andrade
polymerization, causing material hardening [ 7 – 9 ]. This light can be emitted by light-curing units (LCUs), such as conventional quartz tungsten halogen (QTH), xenon plasma arc (PAC), argon laser and light-emitting-diodes (LEDs) [ 10 ].
LED LCUs were
rate? The photodegradation of phenol under the irradiation of the GaN LED clusters using various PFB-modified TiO 2 as catalyst was investigated in this study.
Authors:Zine Eddine Hamami, Laurent Vanoye, Pascal Fongarland, Claude de Bellefon and Alain Favre-Reguillon
An efficient and metal-free method for the oxidation of aldehydes to the corresponding carboxylic acids has been developed. In a simple continuous-flow photochemical reactor, the use of camphorquinone (CQ) irradiated with a white light-emitting diode (LED) source enhanced the autoxidation of aldehydes. Under 5 bar of oxygen, visible light, and 0.3 mol% of CQ, the rate of oxidation was increased from 6 times with 2-ethylhexanal to 30 times for n-nonanal. The large interfacial area generated by a segmented flow apparatus associated with radicals formed by photooxidation of CQ ensures metal-free high throughput of carboxylic acids under safe conditions.
Authors:Katalin Sebők, Attila Kreiter and Orsolya Viktorik
the Middle Neolithic in Western-Hungary (Transdanubia). In: Draşovean, F. (ed.): The Late Neolithic of the Middle Danube Region. Timişoara, 163–174.
Sebők K. 2010 556. Tiszabura-Ledence. RégKut 2009, 367
. He led RIKEN to success.
RIKEN adopted a principal researcher system, introduced by Director Ohkohchi. Principal researchers organized independent research units and managed their research units freely. Some of these research directors
The main religious layleader of the Hungarian Calvinists living in Carpathian Ukraine was the peasant-prophetess, Mrs.Mariska Borku (1910 –1978). Her higly important work, the socalled „Third Testament ” is a manuscript, written under the influence of the Holy Spirit. It was considered by Mrs. Mariska Borku and her followers as a holy text, a part of the Bible.
Authors:S. Rojas, G. Frigo, M. Bernardi, A. de S. Rastelli, A. Hernandes and V. Bagnato
We have investigated the thermal and structural properties of different commercial dental resins: FiltekTM Z-350, Grandio®, Tetric Ceram®, and TPH Spectrum®. The purpose of the present study was to evaluate quantitatively the photo-polymerization behavior and the effect of filler
contents on the kinetic cures of the dental resins by using Differential Scanning Calorimetry (DSC) and Fourier Transform
Infrared Spectroscopy (FT-IR) techniques. We have successfully obtained the low and high glass transition Tg values of the dental composite resins from DSC curves. It was also observed a good agreement between the both Tg values, activation energies from thermal degradation, and the degree of conversion obtained for all samples. The results
have shown that Tetric Ceram® dental resin presented the higher Tg values, activation energy of 215 ± 6 KJ mol−1, and the higher degree of conversion (63%) when compared to the other resins studied herein.