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1
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Variation over Time of the Perez Calibration Algorithm for Ground-Based Spectrometer

100%
Chin S., Boyou N., Yusoff R., Hamid A., Dayou F.
Acta Physica Polonica A
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2016
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vol. 130
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issue 1
160-162
EN
A spectrometer is likely to perform as expected over a period of time if calibrated with suitable method. This paper aims to study the variation of the Perez calibration algorithm over time for a spectrometer. The study was carried out for six months from July to August 2012 and January-April 2013. The measurements were recorded for every minute interval from 8.30 a.m. to 4.30 p.m. in three locations in Kota Kinabalu, Sabah, Malaysia. Monthly calibration constants for eight wavelengths were determined for the Perez model using improved Langley method. When only wavelengths which are close to 500 nm (460, 500, 540, 580, and 620 nm) were engaged, the variations over time of the Perez calibration constants were consistent over time (F=1.381, p= 0.273). This is similar to the previous finding on the Du Mortier algorithm.
2
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Investigation of Physical Climate Inside the Lake Wessel Chamber

100%
Damijan Z., Kasprzak C.
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issue 1
31-34
EN
This study summarizes the research results and environmental measurement data collected in the Lake Wessel Chamber in the salt mine Wieliczka. This chamber is a place where patients who suffer from upper airways diseases are treated during 14-days' therapeutic periods. Therapeutic properties of certain caverns and chambers have been well known since the 1950s while the therapeutic values of underground space, particularly the atmosphere, were discovered in the 1960s and the term "subterranotherapy' was subsequently coined up. The treatment is applied there whereby patients, mostly those suffering from respiratory diseases, are subjected to specific physical, chemical and biological stimuli which are available only underground, those stimuli featuring a complex natural structure and synergic biodynamics. Major features of the underground atmosphere determining its therapeutic properties include the presence of natural aerosols, electroaerosols, temperature, humidity, air circulation, ions, light radiation, electromagnetics, gravitation forces and pH of the atmosphere. This study summarises the radiation measurement data (concentrations of potential energy alpha Cα) and air composition measurements (SO_2, H_2S, CO, CO_2, NO contents). the measurement procedures were in line with the relevant standards and regulations.
3
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Assessing the Indoor Pollutants Effect on Ornamental Plants Leaves by FT-IR Spectroscopy

80%
Husti A., Cantor M., Stefan R., Miclean M., Roman M., Neacsu I., Contiu I., Magyari K., Baia M.
Acta Physica Polonica A
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2016
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vol. 129
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issue 1
142-149
EN
Air pollution has become a mass phenomenon, a major and global problem of modern society, affecting billions of people and environment. People are exposed to various levels of pollutants not just in the outdoor environment, but also in indoors. The quality of life and well-being of employees can be increased by incorporating ornamental plants in the work environment. Among the great variety of plants species able to remove/reduce indoor air pollutants Dracaena deremensis, Sansevieria trifasciata and Ficus elastica were hereby investigated. Their ability to remove chemical pollutants was evaluated in real-life conditions and the changes induced by the environmental stress on the structure and biochemical composition of the plants leaves were evidenced by the Fourier transform infrared spectroscopy. The most pronounced concentration decrease was noticed for the CO₂ (58.33% removed concentration), whereas the mean value of the removed concentration of other chemical pollutants was of ≈ 25%. The Fourier transform infrared spectra analysis revealed that, although the plants are subjected to the chemical pollutants action, they maintain the structure by adjusting their metabolism. A decrease in the overall protein contribution in the amide bands and an increase of the bands assigned to polysaccharide vibrations, illustrate the consequences of the pollution action. Moreover, the chlorophyll presence is evidenced in the IR spectra of all samples by the bands around 1040, 1445, 1620, and 1735 cm^{-1}. The results show that the Fourier transform infrared spectra are an important source of information for the rapid characterization of the chemical structure of the biological systems under environmental stress.
4
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Mass Spectrometric Study of Positive Ion-Molecule Reactions in the C_{3}H_{6} and Ar Mixtures Inside the High Pressure Ion Source

80%
Markowski A., Szot E., Wójcik L.
Acta Physica Polonica A
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2013
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vol. 123
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issue 5
911-915
EN
Ion-molecule reactions have been measured for the propene-argon mixtures of different compositions using a quadrupole mass spectrometer with a high-pressure ion source. The concentration of propane in these mixtures ranged from 10% to 90% (at 10% increment). The following primary and secondary ions: CH_{5}^{+} (m/q=17), C_{2}H_{2}^{+} (m/q=26), C_{2}H_{3}^{+} (m/q=27), C_{2}H_{4}^{+} (m/q=28), C_{2}H_{5}^{+} (m/q=29), C_{3}H_{3}^{+}/^{39}Ar^{+} (m/q=39), C_{3}H_{4}^{+}/^{40}Ar^{+} (m/q=40), C_{3}H_{5}^{+} (m/q=41), C_{3}H_{6}^{+}/^{42}Ar^{+} (m/q=42), C_{3}H_{7}^{+} (m/q=43), C_{3}H_{8}^{+} (m/q=44), C_{4}H_{5}^{+} (m/q=53), C_{4}H_{6}^{+} (m/q=54), C_{4}H_{7}^{+} (m/q=55), C_{4}H_{8}^{+} (m/q=56), C_{4}H_{9}^{+} (m/q=57), C_{5}H_{5}^{+} (m/q=65), C_{5}H_{6}^{+} (m/q=66), C_{5}H_{7}^{+} (m/q=67), C_{5}H_{8}^{+} (m/q=68), C_{5}H_{9}^{+} (m/q=69), C_{5}H_{10}^{+} (m/q=70) were observed. Relative ion current intensities for primary and secondary ions are presented as a function of both total mixtures pressure and concentration of propene in the mixture. Primary ions were produced by electrons with the energy of 300 eV. The potential of repeller electrode V_{R} inside the ion source collision chamber was fixed at 5 V for all measurements. The total mixture pressure was changed from 0.7 to 26.6 Pa. Schemes of ion-molecule reactions were proposed.
5
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Radionuclides in deposition in the Ignalina NPP region in 2005

51%
Jasiulionis R., Rožkov A.
Open Physics
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2006
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vol. 4
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issue 4
417-428
EN
Results of radionuclide activity concentration measurements in deposition and ground-level air conducted at the station of the Institute of Physics situated 3.5 km from the Ignalina Nuclear Power Plant (Ignalina NPP) in 2005 are analyzed. Atmospheric depositional fluxes of 7Be, 60Co and 137Cs are estimated. Radionuclide particle deposition rates are calculated. The Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model of the global dispersion and deposition is used to explain variations in the 137Cs activity concentration in the ground-level air in the Ignalina NPP region in 2005. An increase in the 137Cs activity concentration of up to 17.4 µBq m−3 on 30 October-5 November is studied. Modelling results show that the Chernobyl NPP Unit 4 Sarcophagus and the radiocaesium resuspension from the Chernobyl NPP accident polluted regions are sources of 137Cs to the environment of the Ignalina NPP. Results on solubility in water of aerosols - carriers of 137Cs - are discussed.
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