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    Wyświetlanie 1-5 z 5
    Tytuł:
    Sequestration of organic carbon influenced by the application of straw residue and farmyard manure in two different soils
    Autorzy:
    Mahmoodabadi, M.
    Heydarpour, E.
    Tematy:
    carbon sequestration
    organic carbon
    application
    straw residue
    farmyard manure
    soil
    organic matter incorporation
    Pokaż więcej
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Powiązania:
    https://bibliotekanauki.pl/articles/25526.pdf  Link otwiera się w nowym oknie
    Opis:
    Soil organic carbon is one of the most important soil components, which acts as a sink for atmospheric CO2. This study focuses on the effect of different methods of organic matter application on the soil organic carbon sequestration in a 4-month experiment under controlled greenhouse conditions. Three rates of straw residue and farmyard manure were added to uncultivated and cropland soils. Two treatments of straw residue and farmyard manure incorporation were used into: a soil surface layer and 0-20 cm soil depth. The result showed that the application of organic matter, especially the farmyard manure incorporation led to a significant increase in the final soil organic carbon content. Higher amounts of soil organic carbon were stored in the cropland soil than in the uncultivated soil. On average, the soil surface layer treatment caused a higher sequestration of soil organic carbon compared to the whole soil depth treatment. If higher rates of organic matter were added to the soils, lower carbon sequestration was observed and vice versa. The result indicated that the carbon sequestration ranged farmyardmanure > strawresidue and cropland soil > uncultivated soil. The findings of this research revealed the necessity of paying more attention to the role of organic residue management in carbon sequestration and prevention of increasing global warming.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive robust PID sliding control of a liquid level system based on multi-objective genetic algorithm optimization
    Autorzy:
    Mahmoodabadi, M. J.
    Taherkhorsandi, M.
    Talebipour, M.
    Tematy:
    sliding mode control
    PID control
    adaptive control
    genetic algorithm
    multi-objective optimization
    liquid level system
    Pokaż więcej
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Powiązania:
    https://bibliotekanauki.pl/articles/206697.pdf  Link otwiera się w nowym oknie
    Opis:
    Adaptive robust PID sliding mode control optimized by means of multi-objective genetic algorithm is presented in this paper to control a three-tank liquid level system with external disturbances. While PID constitutes a reliable and stable controller, when compared to sliding mode control (SMC); robustness and tracking performance of SMC are higher than those of the PID control. To use the unique features of both controllers, optimal sliding mode control is executed in terms of a supervisory controller to enhance the performance of optimal adaptive PID control and to provide the necessary control inputs. After the design of the control law, control coefficients of all four involved controllers are optimized by using the multi-objective genetic algorithm so as to minimize errors and the input of the controller. Simulations illustrate that the adaptive robust PID sliding controller based on multi-objective genetic algorithm optimization provides a superior response in comparison to the results obtained separately by PID control, sliding mode control, and adaptive PID control, respectively.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation, quality control and biodistribution studies of 165Dy-chitosan for radiosynovectomy
    Autorzy:
    Shirvani-Arani, S.
    Mahmoodabadi, A.
    Bahrami-Samani, A.
    Jalilian, A. R.
    Mazidi, M.
    Afarideh, H.
    Ghannadi-Maragheh, M.
    Tematy:
    radiosynovectomy
    Dy-165
    chitosan
    biodistribution
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    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Powiązania:
    https://bibliotekanauki.pl/articles/147619.pdf  Link otwiera się w nowym oknie
    Opis:
    The preparation of 165Dy-labeled chitosan for radiosynovectomy applications is described in this paper. 165Dy (T1/2 = 2.33 h) was prepared by irradiation of natural Dy(NO3)3 at a flux of 3.4 x 1013 neutrons/cm2.s for about 6 h. The irradiation resulted in the production of 11.1 GBq (300 mCi) of 165Dy activity. Emitting gamma ray (94.7 keV) and beta particles (Emax = 1.3 MeV, 83%) 165Dy decays to 165Ho. Eight hours after bombardment, the corresponding specific activity was 703 MBq/mg (19 mCi/mg). The irradiated target was dissolved in 0.1 N HCl solution. Radionuclidic purity was ascertained by high resolution gamma spectrometry. Chitosan solution was prepared in acetic acid solution (pH 3). The chitosan solution was labeled with 165Dy to prepare 165Dy-chitosan (165Dy-Chit) complex (labeling yield, greater than 99% and specific activity small tilde 3.7 TBq/mmol). In optimized conditions (pH 3, 35 mg/4 ml chitosan acidic solution, and 370 MBq of 165Dy) Chit was stable after 48 h. Bioevaluation of the prepared 165Dy-Chit was carried out by injecting 37 MBq (1 mCi, 50.100 mi1) directly into the knee joints of wild rats. Free 165Dy cation was also injected to study the effect of complex formation on the retention of radionuclide in the administered site. To study the consequence of radioactivity leakage from the administration site, a dilute sample of the complex was injected intravenously into the rats followed by biodistribution studies. It was observed that there was no significant extra-articular leakage of the injected activity over the study period of 24 h post-injection.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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