The present study was carried out to investigate the effect of He–Ne laser irradiations on wheat (Triticumaestivum L.) variety PBW-373 seeds on uptake and internal distribution of zinc ion in wheat plants for different irradiation time
in soil culture. The transport of zinc from root system to shoot and grain was studied by incorporating radioactive zinc as
zinc chloride (Zn*Cl2) with the nutrient solution to the plants. The 65Zn activity absorbed by the matured plants and distributed in different parts (root, shoot and grain) was measured with a
calibrated NaI (Tl) gamma ray spectrometer. The results led the conclusion that translocation of zinc from shoot to grain
in mature plants in treated soaked seeds showed a better result in comparison to dry treated and control seeds. The utilization
of zinc from roots to shoots was higher in the plants grown from dry seeds in all given treatments and from shoot to grain
was best in soaked seeds at 2 min irradiation period.
Authors:J. Morales, M. Dinator, F. Llona, J. Saavedra, and F. Falabella
A method to prepare thin samples of archeological materials such as potteries and bones for PIXE analysis is presented. In this method fine powder of the matter under analysis is suspended and deposited on polycarbonate filters. The process takes place in a chamber where clean air and the powder are mixed and forced to pass through the filter. Thin samples with typical mass density of about 50 g cm–2 are obtained. The uniformity of the mass deposit has been optically tested with a He–Ne laser showing fluctuations of the order of one percent. Samples of clay standards from NIST were prepared with this method and analyzed by PIXE. The agreement between our results and NIST values is very good, with linear correlation factors close to unity. The method was applied to study the elemental composition of clay from different fragments of a Chilean pre-Hispanic pottery piece. These results are very consistent showing that the analysis of samples from a small fragment can represent the whole piece.
Authors:Mauro Francisco Pinheiro da Silva, Heloisa Cristina de Jesus Fraga da Costa, Eduardo Rezende Triboni, Mário José Politi, and Paulo Celso Isolani
. Raman spectra were recorded on a Renishaw mod. 3000 imaging system, equipped with an Olympus microscope, a He/Nelaser (Spectra Physics mod. 127, λ = 632.8 nm) and a CCD detector. Calculations of average crystallite sizes of CeO 2 using Raman
Authors:Lenka Stránská, Petra Šulcová, and Jitka Mouchová
. GB). It is a highly integrated laser measuring system (He–Nelaser, λ = 633 nm) for the analysis of particle size distribution. The structure of the prepared pigments was also investigated. The synthetized pigments were studied by X-ray diffraction
Authors:E. Horváth, J. Kristóf, R. Kurdi, É. Makó, and V. Khunová
Bruker Senterra spectrometer using a He–Nelaser (633 nm, 20 mW) and a liquid nitrogen-cooled CCD detector. 64 spectra (obtained from an area of 3 μm in diameter) were averaged to improve the signal to noise ratio. Band fitting was done using the Jandel
Authors:Petra Šulcová, Lucie Vitásková, and Miroslav Trojan
). It is a highly integrated laser measuring system (He–Nelaser with 633 nm) for the analysis of particle size distribution.
Results and discussion
The goal was to develop conditions for the synthesis of these compounds and
Authors:Mauro da Silva, Flávio de Souza Carvalho, Tereza da Silva Martins, Márcia de Abreu Fantini, and Paulo Isolani
through a Rietveld GSAS refining program [ 33 – 35 ]. Raman spectra of CeO 2 samples were recorded on a Renishaw mod. 3000 imaging system coupled to a He–Nelaser (Spectra Physics mod. 127, λ = 632.8 nm) equipped with an Olympus metallurgical microscope
Authors:Ekkachai Kanchanatip, Nurak Grisdanurak, Raumporn Thongruang, and Arthit Neramittagapong
-hole pair effect was examined by a Photoluminescence spectrometer (Perkin Elmer model LS55). The isoelectric point and surface charge of the catalysts were measured using a Malvern Zetasizer NanoZS with He–Nelaser source at λ of 633 nm
Authors:M. F. Pinheiro da Silva, L. S. Soeira, K. R. P. Daghastanli, T. S. Martins, I. M. Cuccovia, R. S. Freire, and P. C. Isolani
°, counting time 5 s per point, for a step size of 0.02° (2θ).
Raman spectra of CeO 2 samples were recorded on a Renishaw model 3000 imaging system coupled to a He–Nelaser (Spectra Physics model 127, λ = 632.8 nm) equipped with an Olympus