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The effect of external electric fields on the photoluminescence of quantum-sized nanocrystals of cadmium selenide excited
by photons of various energies is studied. Photoluminescence quenching by external electric fields is found to be different
for nanoparticles with different shapes (quantum dots and nanorods) and does not depend on the exciting photon energy. The
relationship between the strength of the external electric field and the degree of quenching is determined empirically for
both types of nanoparticles. A possible mechanism for the effect of an external electric field on the excitation and quenching
of photoluminescence in quantumsized nanoparticles is discussed.

Content Type Journal ArticlePages 95-103DOI 10.1007/s10812-012-9569-3Authors
L. I. Gurinovich, B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Ave., Minsk, 220072 BelarusM. V. Artemyev, Scientific-research Institute of Physical and Chemical Problems, Belarusian State University, Minsk, BelarusA. P. Stupak, B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Ave., Minsk, 220072 BelarusS. Ya. Prislopskii, B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Ave., Minsk, 220072 BelarusS. V. Zhukovsky, B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Ave., Minsk, 220072 BelarusS. V. Gaponenko, B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Ave., Minsk, 220072 Belarus

Journal Journal of Applied SpectroscopyOnline ISSN 1573-8647Print ISSN 0021-9037

Journal Volume Volume 79

Journal Issue Volume 79, Number 1

We have theoretically studied the nature of strong optical losses in the red region of the spectrum that occur in sodium vapor.
We take into account the effect of the Ar buffer gas and Na₂ dimers on the resulting absorption of light by the system. Based on the proposed approach, we determine the interatomic distance
in the dimers and achieve good agreement with quantum calculations and direct measurements. We show that intrinsic transitions
in atomic argon may be the reason for the appearance of a broad absorption peak in the range 700–1000

Porous aluminum oxide is prepared in a 0.4

The effect of anionic substitution of halogen atoms on the spectral position and shape of the optical absorption edge and
the dispersion of the refractive index of crystals of Cu₆PS₅I_1–xCl_x solid solutions are studied. The concentration dependences of the width of the optical pseudogap, refractive index, and lattice
parameters are shown to be interrelated in these solid solution crystals.

Content Type Journal ArticlePages 83-86DOI 10.1007/s10812-012-9567-5Authors
I. P. Studenyak, Uzhhorod National University, 48 Pidhirna Str., Uzhhorod, 88000 UkraineV. E. Ponomaryov, Uzhhorod National University, 48 Pidhirna Str., Uzhhorod, 88000 UkraineM. Kranjčec, University of Zagreb, Varazhdin, CroatiaYu. V. Minets, Uzhhorod National University, 48 Pidhirna Str., Uzhhorod, 88000 UkraineL. M. Suslikov, Uzhhorod National University, 48 Pidhirna Str., Uzhhorod, 88000 Ukraine

Journal Journal of Applied SpectroscopyOnline ISSN 1573-8647Print ISSN 0021-9037

Journal Volume Volume 79

Journal Issue Volume 79, Number 1

We have studied fluorescence spectra of the human lens in vivo for healthy eyes and in different stages of senile cataract
development. We propose a spectral criterion, the lens opacity index, allowing us to differentiate between stages of cataract
development. We show a high correlation between the stage of cataract development and the opacity index. We propose an empirical
expression for determining the stage of senile cataract development from the value of the lens opacity index. The technique
has been clinically tested.

Content Type Journal ArticlePages 126-130DOI 10.1007/s10812-012-9573-7Authors
E. S. Vladimirova, Institute of Engineering Physics and Radioelectronics, Siberian Federal University, 28 Kirenskogo Str., Krasnoyarsk, 660074 RussiaV. V. Salmin, Institute of Engineering Physics and Radioelectronics, Siberian Federal University, 28 Kirenskogo Str., Krasnoyarsk, 660074 RussiaA. B. Salmina, V. F. Voino-Yasenetsky Krasnoyarsk State Medical University, Krasnoyarsk, RussiaS. A. Oskirko, V. F. Voino-Yasenetsky Krasnoyarsk State Medical University, Krasnoyarsk, RussiaV. I. Lazarenko, V. F. Voino-Yasenetsky Krasnoyarsk State Medical University, Krasnoyarsk, RussiaA. S. Provorov, Institute of Engineering Physics and Radioelectronics, Siberian Federal University, 28 Kirenskogo Str., Krasnoyarsk, 660074 Russia

Journal Journal of Applied SpectroscopyOnline ISSN 1573-8647Print ISSN 0021-9037

Journal Volume Volume 79

Journal Issue Volume 79, Number 1

Bladder cancer is one of the most common cancers in Africa. It takes several days to reach a diagnosis using histological
examinations of specimens obtained by endoscope, which increases the medical expense. Recently, spectroscopic analysis of
bladder cancer tissues has received considerable attention as a diagnosis technique due to its sensitivity to biochemical
variations in the samples. This study investigated the use of Fourier transform infrared (FTIR) spectroscopy to analyze a
number of bladder cancer tissues. Twenty-two samples were collected from 11 patients diagnosed with bladder cancer from different
hospitals without any pretreatment. From each patient two samples were collected, one normal and another cancerous. FTIR spectrometer
was used to differentiate between normal and cancerous bladder tissues via changes in spectra of these samples. The investigations
detected obvious changes in the bands of proteins (1650, 1550

IR absorption spectra of indolinospironaphthooxazine (ISNO) are presented. The geometric structure and normal coordinates
of the ISNO molecule have been calculated using a quantum mechanical DFT method. The IR spectrum of ISNO in its original spiro
form has been interpreted for the first time. Four normal modes in the range 800–1200

We consider and experimentally study two reflection refractometry methods involving reflection of light from the optical surface
of a material for nearly normal incidence and for incidence at the Brewster angle. We analyze the sources of error in the
methods, and show that it is possible to use laser radiation to measure the refractive index of materials to four decimal
places. We note the advantages of the methods in preparing samples for measurements in the case of solid, liquid, film, and
weakly absorbing materials.

Content Type Journal ArticlePages 148-156DOI 10.1007/s10812-012-9577-3Authors
E. A. Tikhonov, Institute of Physics, National Academy of Sciences of Ukraine, 46 prosp. Nauki, Kiev, 03680 UkraineV. A. Ivashkin, Institute of Physics, National Academy of Sciences of Ukraine, 46 prosp. Nauki, Kiev, 03680 UkraineA. K. Ljamec, Institute of Physics, National Academy of Sciences of Ukraine, 46 prosp. Nauki, Kiev, 03680 Ukraine

Journal Journal of Applied SpectroscopyOnline ISSN 1573-8647Print ISSN 0021-9037

Journal Volume Volume 79

Journal Issue Volume 79, Number 1

A sensitive, precise, and cost-effective UV-spectrophotometric method is described for the determination of pheniramine maleate
(PAM) in bulk drug and tablets. The method is based on the measurement of absorbance of a PAM solution in 0.1

Charge-transfer interactions of perhydroisoquinoline (PHIQ) with 2,3-dichloro-5,6-dicyano-1,4- benzoquinone (DDQ), p-chloranil
(CHL), and 7,7′,8,8′-tetracyanoquinodimethane (TCNQ) in chloroform as a solvent have resulted in stable complexes with a general
formula [(PHIQ)(acceptor)] with a molar ratio of 1:1 (donor:acceptor). Elemental (C, H, N) and thermogravimetric (TGA/DTG)
analyses, photometric titration, and electronic, infrared, and ¹H NMR spectra were used to give an idea of the charge-transfer interaction between donating and accepting sites. The Benesi–Hildebrand
method and its modification were used to determine an association constant (K) and a molar extinction coefficient (ε).

Content Type Journal ArticlePages 11-21DOI 10.1007/s10812-012-9558-6Authors
Moamen S. Refat, Chemistry Department, Faculty of Science, Port Said University, Port Said, EgyptSraa Abou-Melha, Faculty of Science of girls, King Khaled University, Abha, Kingdom of Saudi Arabia

Journal Journal of Applied SpectroscopyOnline ISSN 1573-8647Print ISSN 0021-9037

Journal Volume Volume 79

Journal Issue Volume 79, Number 1