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    Tytuł:
    Separation of Ho3+ in Static Magnetic Field
    Autorzy:
    Kołczyk, K.
    Wojnicki, M.
    Kutyła, D.
    Kowalik, R.
    Żabiński, P.
    Cristofolini, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/355096.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rare earth metals
    REE
    recycling
    separation
    magnetic field
    Opis:
    The rare earths elements (REE) belong to the group of critical metals and they are achieving more and more interest due to their special properties. However, there occur some problems connected with their production. The most difficult phase is separation of REE. It includes a necessity to intensify currently applied processes and looking for new solutions. The present work introduces an idea to use differences in physical properties of the REE ions to get them separated. In the experimental part of the work some efforts were undertaken to analyse results presenting changes of holmium ions concentration under an influence of the magnetic field gradient. There was determined the gradient of magnetic field and concentration of Ho3+ ions depending on initial concentration of the solution and time. A simulation of changing the concentration of holmium ions in the solution under an influence of the magnetic field gradient was performed to compare the mathematical model with the obtained results.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 4; 1919-1924
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Ho3+ ions for quantitation of iron (Fe) in 0.1 M HCl solution using microwave plasma-atomic emission spectrometry (MP-AES)
    Wpływ jonów Ho3+ na jakościowe oznaczanie żelaza w roztworze 0.1 M HCI metodą atomowej spektroskopii emisyjnej z plazmą mikrofalową (MP-AES)
    Autorzy:
    Stępień, M.
    Bukowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/264243.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    MP-AES
    ANOVA
    Fe
    Ho3+
    Opis:
    During research work in the Non-Ferrous Metals Department on AGH University of Science and Technology concerning new corrosion inhibitors for iron alloys in magnetic fields, Ho3+ ions were proposed as one of the new inhibitors. One of the methods for determining the rate of the corrosion process is determining the concentration of Fe ions in a solution. Due to the required high precision of determining the concentration of Fe ions in a solution contains Ho3+ ions with a wide range of concentrations, the influence of the matrix effect and interferences of Ho3+ ions must be known. The present work investigates the impact of Ho ions within a range of 0 to 100 mg/L for the quantitation of Fe ions in a 0.1 M HCl solution using the MP-AES method. The obtained results were analyzed using the single-factor ANOVA method. In a range of up to 40 mg/L, Ho3+ ions are not a significant factor to determining the Fe concentration by MP-AES.
    W trakcie prac badawczych prowadzonych na Katedrze Fizykochemii i Metalurgii Metali Nieżelaznych na Akademii Górniczo-Hutniczej w Krakowie dotyczących nowych inhibitorów korozji stopów żelaza w polu magnetycznym, jako jeden z nowych inhibitorów zaproponowano jony Ho. Jedną z metod określenia postępów procesu korozji było oznaczenie stężenia jonów Fe w roztworze metodą atomowej spektroskopii emisyjnej w plazmie mikrofalowej (MP-AES). Z uwagi na wymaganą wysoką precyzję określenia niewielkiej zawartości jonów Fe w roztworach o różnej zawartości jonów Ho konieczne stało się zbadanie, czy obecność jonów Ho wpływa istotnie na ocenę ilościową jonów Fe metodą MP-AES. W niniejszej pracy zbadano wpływ stężenia jonów Ho w zakresie stężeń od 0 do 100 mg/l na oznaczenie zawartości Fe w 0,1 M kwasie solnym. Uzyskane wyniki poddano analizie statystycznej z wykorzystaniem metody ANOVA. W zakresie stężeń jonów Ho w analicie do 40 mg/L nie wykazano istotnego wpływu na oznaczenie żelaza na poziomie ufności 95%.
    Źródło:
    Metallurgy and Foundry Engineering; 2018, 44, 3; 109-117
    1230-2325
    2300-8377
    Pojawia się w:
    Metallurgy and Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    $Tm^{3+}//Ho^{3+}$-Doped ASE Fibre Source for Mid-Infrared Sensor Applications
    Autorzy:
    Dorosz, D.
    Żmojda, J.
    Kochanowicz, M.
    Miluski, P.
    Dorosz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418068.pdf
    Data publikacji:
    2012-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.81.-i
    42.79.Ag
    33.20.Kf
    Opis:
    The infrared emission of $Tm^{3+}//Ho^{3+}$-doped antimony-silicate optical fiber has been presented. Luminescence at 2.1 μm corresponding to ⁵I₇ → ⁵I₈ transition in holmium was obtained by energy transfer between $Tm^{3+}$ and $Ho^{3+}$ ions. According to the Förster-Dexter theory, the efficiency of energy transfer of the $\text{}^3 F_4 (Tm^{3+}) \rightarrow \text{}^5 text{|}_7 (Ho^{3+})$ transition was calculated. The optimization of the activator content and the donor $(Tm^{3+})$/acceptor $(Ho^{3+})$ ions concentration ratio were conducted with the purpose of maximizing the efficiency of energy transfer. It made possible to select best-suited glass which was used to manufacture double-clad optical fiber. Strong and narrow bands of amplified spontaneous emission which formed as a result of energy transfer between thulium and holmium ions were observed in the fiber under exciting with radiation at 795 nm wavelength.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 5; 927-932
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    White Upconversion in $Yb^{3+}//Tm^{3+}//Ho^{3+}$ Co-Doped Antimony-Germanate Glasses
    Autorzy:
    Żmojda, J.
    Dorosz, D.
    Kochanowicz, M.
    Miluski, P.
    Dorosz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399412.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.81.-i
    42.79.Ag
    33.20.Kf
    42.25.Bs
    Opis:
    In the paper the spectroscopic properties of antimony-germanate glass co-doped with $Yb^{3+}//Ho^{3+}$ has been investigated. Fabricated $Yb^{3+}//Tm^{3+}/Ho^{3+}$ co-doped glass is characterised by the emission of simultaneous multicolour upconversion luminescence. Strong blue $\text{}^{1}G_{4} \rightarrow \text{}^{3}H_{6}(Tm^{3+})$, green $\text{}^{5}F_{4} \rightarrow \text{}^{5}I_{8}(Ho^{3+})$ and red $\text{}^{5}F_{5} \rightarrow \text{}^{5}I_{8}(Ho^{3+})$ upconversion emission bands have been measured under 976 nm excitation at room temperature. Influence of molar ratio of active ions and excitation power on the colour coordinates (CIE-1931) have been investigated.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 598-601
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    2.1 žm emission of Tm3+/Ho3+ - doped antimony-silicate glasses for active optical fibre
    Autorzy:
    Żmojda, J.
    Dorosz, D.
    Dorosz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/200143.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    antimony-silicate glasses
    Tm3+/Ho3+ glasses
    active optical fibre
    Opis:
    Tm3+/Ho3+ – doped antimony-silicate optical fibre with 2.1 ěm emission has been presented. Luminescence corresponding to 5I7 --> 5I8 transition in holmium was obtained by energy transfer between Tm3+ and Ho3+ ions. The analysis of the luminescence mechanism showed a significant influence of the glass composition (low phonon content) on the emission intensity. Optimization of the active elements content, presented in the paper, allowed to indicate that a strong emission intensity at 2 ěm in the fabricated glasses was obtained for the molar composition of 1% Tm2O3 : 0.75% Ho2O3. According to the F¨orster-Dexter theory, the efficiency of energy transfer of the 3F4 (Tm3+) --> 5I7 (Ho3+) transition was calculated. Moreover, it was found that the full width at half maximum (FWHM) of luminescence in the range of 1.6 – 2.2 ěm strongly depends on the Tm3+/Ho3+ ratio. The optimization of Tm3+/Ho3+ transfer in antimony-silicate glasses allowed to fabricate optical fibre with narrowing and red-shifting of emission at 2.1 ěm.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 381-387
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Complex Magnetic Behaviour of $Ho_3Cu_4X_4$ Compounds (X = Si and Sn)
    Autorzy:
    Gondek, Ł.
    Szytuła, A.
    Prokhnenko, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813174.pdf
    Data publikacji:
    2008-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.25.+z
    75.50.Ee
    75.40.Cx
    Opis:
    Ternary $Ho_3Cu_4X_4$ compounds exhibit very complex magnetic phase diagrams. The rare earth ions occupy two non-equivalent crystal positions. Within both magnetic sublattices, magnetic moments exhibit different magnetic ordering temperatures. Moreover, in light of our results, it seems that both sublattices are weakly coupled between each other. This may be observed as independent changes of propagation vectors etc. The major difference of ordering temperatures between both compounds is likely related to substantial change of interatomic distances. Consequently, completely different crystalline electric field effects are observed.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 4; 1179-1184
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Ho Doping Contents on the Structural, Microstructure and Dielectric Properties of Bi5Ti3FeO15 Aurivillius Ceramics
    Autorzy:
    Tomaszewska, M.
    Dzik, J.
    Wodecka-Duś, B.
    Pikula, T.
    Adamczyk-Habrajska, M.
    Szalbot, D.
    Chocyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049646.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ceramics
    Bi5Ti3FeO15
    Ho3+ doping
    microstructure
    structure
    dielectric properties
    Opis:
    Aurivillius Bi5-xHoxTi3FeO15 (BHTFO) multiferroic ceramics with different holmium doping contents were synthesized by conventional solid state reaction. The effect of holmium doping on the microstructure, structural and dielectric behaviors of BHTFO ceramics were investigated in details. Microstructure and crystalline structure studies of ceramics were carried out at room temperature while dielectric properties were investigated in a wide range of temperature (T = 25ºC-550ºC) and frequency (20Hz-1MHz).
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 91-96
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy Transfer Mechanisms and Excited State Dynamics of Yb$\text{}^{3+}$, Tm$\text{}^{3+}$ and Ho$\text{}^{3+}$ Doped Gd$\text{}_{3}$Ga$\text{}_{5}$O$\text{}_{12}$ Single Crystals
    Autorzy:
    Brenier, A.
    Courrol, L. C.
    Pédrini, C.
    Madej, C.
    Boulon, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929795.pdf
    Data publikacji:
    1993-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.55.Nw
    78.55.Hx
    Opis:
    The transfer mechanisms occurring in ytterbium, thulium and holmium doped gadolinium gallium garnet crystals are presented. Various models are used to modelize the up- and down-conversion processes. They lead to a good description of the excited state dynamics and provide information about the efficiencies of the transfers.
    Źródło:
    Acta Physica Polonica A; 1993, 84, 5; 931-939
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Local Structure of Mn in $(La_{1-x}Ho_{x})_{2//3}Ca_{1//3}MnO_{3}$ Studied by X-ray Absorption Fine Structure
    Autorzy:
    Pietnoczka, A.
    Pękała, M.
    Bacewicz, R.
    Drozd, V.
    Fagnard, J.
    Vanderbemden, P.
    Antonowicz, J.
    Zalewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538864.pdf
    Data publikacji:
    2010-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cj
    75.47.Lx
    87.64.kd
    Opis:
    Results of X-ray absorption fine structure measurements in manganites $(La_{1-x}Ho_{x})_{2//3}Ca_{1//3}MnO_{3}$ with 0.15 < x < 0.50 are presented. When $LaMnO_{3}$ is doped with a divalent element such as $Ca^{2+}$, substituting for $La^{3+}$, holes are induced in the filled Mn d orbitals. This leads to a strong ferromagnetic coupling between Mn sites. Ca ions in $La_{1-x}Ca_{x}MnO_{3}$ introduce a distortion of the crystal lattice and mixed valence Mn ions ($Mn^{3+}$ and $Mn^{4+}$). On the other hand, in manganites $(La_{1-x}Ho_{x})_{2//3}Ca_{1//3}MnO_{3}$ the substitution of La for Ho causes a lattice distortion and induces a disorder, which reduces a magnetic interaction. The ferromagnetic transition temperature and conductivity decrease very quickly with increasing x. The magnetic and transport properties of compounds depend on the local atomic structure around Mn ions. The information on the bond lengths and Debye-Waller factor are obtained from the extended X-ray absorption fine structure (EXAFS) data analysis. The charge state of Mn is determined from the position of the absorption edge in X-ray absorption near edge structure (XANES) data. XAFS results are in good agreement with magnetic characteristics of the studied materials.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 2; 281-285
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gomer – antyideał żony czy wzorcowa metafora relacji oblubieńczej na podstawie Hieronimowego Komentarza do Oz 1-3?
    Gomer – the anti-ideal of wife or the model metaphor of bride’s relation on the basis of st. Jerome’s Comment on Ho 1-3?
    Autorzy:
    Jóźwiak, Magdalena
    Powiązania:
    https://bibliotekanauki.pl/articles/612149.pdf
    Data publikacji:
    2016
    Wydawca:
    Katolicki Uniwersytet Lubelski Jana Pawła II
    Tematy:
    Św. Hieronim
    Komentarz do Ozeasza
    Gomer
    St. Jerome
    A Commentary on the Book of Hosea
    Opis:
    In this article we included St. Jerome’s standpoint on Gomer - the prostitute and wife of Hosea. This topic was presented in two stages. First, we analysed an issue of ideal woman according to St. Jerome. Then we presented a picture of Gomer in St. Jerome’s comment on the Book of Hosea 1–3. The main point of this article was an attempt to answer a question how St. Jerome deals with conveying the biblical meaning, according to which the prophet on God’s command marries an adulterous woman. This issue is very interesting, because the author of Vulgate had rather unfavourable attitude towards the institution of marriage and Gomer was not only married, but also a prostitute.
    Źródło:
    Vox Patrum; 2016, 66; 169-178
    0860-9411
    2719-3586
    Pojawia się w:
    Vox Patrum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A proof of the crossing number of $K_{3,n}$ in a surface
    Autorzy:
    Ho, Pak
    Powiązania:
    https://bibliotekanauki.pl/articles/743447.pdf
    Data publikacji:
    2007
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    crossing number
    bipartite graph
    surface
    Opis:
    In this note we give a simple proof of a result of Richter and Siran by basic counting method, which says that the crossing number of $K_{3,n}$ in a surface with Euler genus ε is
    ⎣n/(2ε+2)⎦ {n - (ε+1)(1+⎣n/(2ε+2)⎦)}.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2007, 27, 3; 549-551
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comments on “3-aminopropyltriethoxysilane functionalized nanoscale zero-valent iron for the removal of dyes from aqueous solution”
    Autorzy:
    Ho, Y. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/779896.pdf
    Data publikacji:
    2011
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Źródło:
    Polish Journal of Chemical Technology; 2011, 13, 4; 89-89
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The projective plane crossing number of the circulant graph C(3k;{1,k})
    Autorzy:
    Ho, Pak
    Powiązania:
    https://bibliotekanauki.pl/articles/743680.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    crossing number
    circulant graph
    projective plane
    Opis:
    In this paper we prove that the projective plane crossing number of the circulant graph C(3k;{1,k}) is k-1 for k ≥ 4, and is 1 for k = 3.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2012, 32, 1; 91-108
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Ga$\text{}_{2}$O$\text{}_{3}$ Nanobelts Synthesized by the Thermal Annealing of GaN Powders
    Autorzy:
    Kim, Hyoun Woo
    Kim, Nam Ho
    Powiązania:
    https://bibliotekanauki.pl/articles/2041772.pdf
    Data publikacji:
    2005-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.07.-b
    81.05.Hd
    Opis:
    We synthesized the uniform monoclinic gallium oxide (Ga$\text{}_{2}$O$\text{}_{3}$) nanobelts by a simple thermal annealing of GaN powders. The as-syn-thesized nanobelts were rectangular in cross-sectional shape with width ranging from 100 to 700 nm. The length direction of the nanobelt was along [010]. Photoluminescence measurement under excitation at 325 nm showed that the Ga$\text{}_{ }$2O$\text{}_{3}$ nanobelts had a blue emission at around 454 nm.
    Źródło:
    Acta Physica Polonica A; 2005, 107, 2; 346-350
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Milling Duration on the Thermoelectric Properties of n-Type Bi2Te2.7Se0.3
    Autorzy:
    Park, Min-Soo
    Koo, Hye-Young
    Park, Yonh-Ho
    Ha, Gook-Hyun
    Powiązania:
    https://bibliotekanauki.pl/articles/354698.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermoelectric
    bismuth telluride
    powder
    milling
    Opis:
    In this study, an oxide reduction process and a reduction-sintering process were employed to synthesize a thermoelectric alloy from three thermoelectric composite oxide powders, and the thermoelectric properties were investigated as a function of the milling duration. Fine grain sizes were analyzed by via X-ray diffraction and scanning electron microscopy, to investigate the influence of the milling duration on the synthesized samples. It was found that microstructural changes, the Seebeck coefficient, and the electrical resistivity of the compounds were highly dependent on the sample milling duration. Additionally, the carrier concentration considerably increased in the samples milled for 6 h; this was attributed to the formation of antisite defects introduced by the accumulated thermal energy. Moreover, the highest value of ZT (=1.05) was achieved at 373K by the 6-h milled samples. The temperature at which the ZT value maximized varied according to the milling duration, which implies that the milling duration of the three thermoelectric composite oxide powders should be carefully optimized for their effective application.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 2; 591-595
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on Recovery of Valuable Metals in Spent Lithium-Ion Batteries by Al2O3-SiO2-CaO-Fe2O3 Slag System
    Autorzy:
    Moon, Tae Boong
    Han, Chulwoong
    Hyun, Soong-Keun
    Park, Sung Cheol
    Son, Seong Ho
    Lee, Man Seung
    Kim, Yong Hwan
    Powiązania:
    https://bibliotekanauki.pl/articles/2049176.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    spent lithium-ion battery
    smelting
    Al2O3-SiO2-CaO-Fe2O3
    recovery
    slag
    Opis:
    This study investigated the recovery behavior of valuable metals (Co, Ni, Cu and Mn) in spent lithium ion-batteries based on Al2O3-SiO2-CaO-Fe2O3 slag system via DC submerged arc smelting process. The valuable metals were recovered by 93.9% at the 1250°C for 30 min on the 20 Al2O3-40SiO2-20Cao-20Fe2O3 (mass%) slag system. From the analysis of the slag by Fourier-transform infrared spectroscopy, it was considered that Fe2O2 and Al2O3 acted as basic oxides to depolymerize SiO4 and AlO4 under the addition of critical 20 mass% Fe2O3 in 20 Al2O3-40SiO2-Cao-Fe2O3 (Cao + Fe2O3 = 40 mass%). in addition, it was observed that the addition of Fe2O3 ranging between 20 and 30 mass% lowers the melting point of the slag system.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 4; 983-986
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ganoderma lucidum extract stimulates glucose uptake in L6 rat skeletal muscle cells
    Autorzy:
    Jung, Kyung
    Ha, Eunyoung
    Kim, Mi-Ja
    Uhm, Yoon
    Kim, Hye
    Hong, Seung-Jae
    Chung, Joo-Ho
    Yim, Sung-Vin
    Powiązania:
    https://bibliotekanauki.pl/articles/1041224.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    Ganoderma lucidum extract
    skeletal muscle
    phosphatidylinositol 3-kinase
    AMP-activated protein kinase
    glucose uptake
    Opis:
    The effect of Ganoderma lucidum extract on glucose uptake was studied in L6 rat skeletal muscle cells. G. lucidum extract increased glucose uptake about 2-fold compared to control. The extract stimulated the activity of phosphatidylinositol (PI) 3-kinase which is a major regulatory molecule in the glucose uptake pathway. About 7-fold increased activity of a PI 3-kinase was observed after treatment with G. lucidum extract, whereas PI 3-kinase inhibitor, LY294002, blocked the G. lucidum extract-stimulated PI 3-kinase activity in L6 skeletal muscle cells. Protein kinase B, a downstream mediator of PI 3-kinase, was also activated by G. lucidum extract. We then assessed the activity of AMP-activated protein kinase (AMPK), another regulatory molecule in the glucose uptake pathway. G. lucidum extract increased the phosphorylation level of both AMPK α1 and α2. Activity of p38 MAPK, a downstream mediator of AMPK, was also increased by G. lucidum extract. Taken together, these results suggest that G. lucidum extract may stimulate glucose uptake, through both PI 3-kinase and AMPK in L6 skeletal muscle cells thereby contributing to glucose homeostasis.
    Źródło:
    Acta Biochimica Polonica; 2006, 53, 3; 597-601
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study on the Recovery of Lithium and Ni/Co oxide from Cathode Active Powder of End-of-Life NCA(LiNiCoAlO2) Battery
    Autorzy:
    Shin, Shun-Myung
    Shin, Dong-Ju
    Joo, Sung-Ho
    Wang, Jei-Pil
    Powiązania:
    https://bibliotekanauki.pl/articles/352178.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cathode active powder
    NCA(LiNiCoAlO2)
    Li2CO3
    nickel oxide
    cobalt oxide
    Opis:
    This study was attempted to study for recovery of Li as Li2CO3 from cathode active material, especially NCA (LiNiCoAlO2), recovered from spent lithium ion batteries. This consists of two major processes, carbonation using CO2 and water leaching. Carbonation using CO2 was performed at 600ºC, 700ºC and 800ºC, and NCA (LiNiCoAlO2) was phase-separated into Li2CO3, NiO and CoO. The water leaching process using the differences in solubility was performed to obtain the optimum conditions by using the washing time and the ratio of the sample to the distilled water as variables. As a result, NCA (LiNiCoAlO2) was phase-separated into Li2CO3 and NiO, CoO at 700ºC, and Li2CO3 in water was recovered through vacuum filtration after 1 hour at a 1:30 weight ratio of the powder and distilled water. Finally, Li2CO3 containing Li of more than 98 wt.% was recovered.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 2; 481-485
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Transport Properties of La$\text{}_{0.75-x}$RE$\text{}_{x}$Ca$\text{}_{0.25}$MnO$\text{}_{3}$ (RE = Gd, Dy, Ho; 0≤ x≤0.75) Manganites
    Autorzy:
    Drozd, V.
    Pękała, M.
    Kovac, J.
    Skorvanek, I.
    Szymański, M.
    Nedilko, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2041482.pdf
    Data publikacji:
    2004-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.47.Lx
    71.38.-k
    72.20.Ee
    75.50.Dd
    Opis:
    Structure and transport properties have been studied for a series of La$\text{}_{0.75-x}$RE$\text{}_{x}$Ca$\text{}_{0.25}$MnO$\text{}_{3}$ manganites with heavy rare earth ions of Gd, Dy, Ho substituting La with x=0, 0.10, 0.25, 0.50, and 0.75. Polycrystalline samples were prepared by the carbonate precipitation route. The oxygen content was determined by the iodometric titration. The X-ray investigations carried out by the powder method show that the unit cell volume gradually decreases and orthorhombic distortion of the lattice increases with rising RE content. Below the room temperature the electrical resistivity is of the semiconducting type for all the samples studied. Electrical resistivity vs. temperature dependences were analyzed within different models: simple thermal activation, Mott's variable range hopping, adiabatic, nonadiabatic, and bipolaron. The Curie temperatures of Gd, Dy, and Ho substituted manganites determined from magnetization measurements show that at 280 K all the samples are in the paramagnetic phase. The increasing RE fraction reduces magnetization at 4 K as compared to La$\text{}_{0.75}$Ca$\text{}_{0.25}$MnO$\text{}_{3}$.
    Źródło:
    Acta Physica Polonica A; 2004, 106, 5; 751-758
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Taxonomical reinvestigation of the colepid species Pinacocoleps pulcher (Spiegel, 1926) Foissner et al., 2008 (Ciliophora: Prorodontida: Colepidae)
    Autorzy:
    Moon, Ji Hye
    Kim, Ji Hye
    Jung, Jae-Ho
    Powiązania:
    https://bibliotekanauki.pl/articles/52394357.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    ciliate
    redescription
    taxonomy
    SSU rDNA sequences
    brackish water
    Korea
    Opis:
    Brackish water populations of Pinacocoleps pulcher were collected from a lagoon in Korea. This species has never been described using silver impregnation and nuclear small subunit ribosomal RNA (SSU rRNA) gene. In the present study, we investigated the morphological and molecular attributes of P. pulcher using standard methods. The morphology was studied based on observations of live materials, silver-impregnated preparations, and scanning electron microscopy. The morphological characteristics are as follows: body size 80–90 × 40–50 µm in vivo, shape broadly ellipsoidal, body cross-section ellipsoidal, about seven anterior spines and about seven posterior spines, approximately 21 somatic ciliary rows, one macronucleus and one micronucleus, and a single caudal cilium. The SSU rRNA gene tree supports a sister relationship of P. pulcher to the genus Apocoleps, not P. tesselatus.
    Źródło:
    Acta Protozoologica; 2017, 56, 3; 161-169
    0065-1583
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determine the Scope of Influence and Impact Due to Noise from Wind Turbines During the Operation of Wind Power Plant Project No. 3 – Soc Trang Province
    Określenie zakresu oddziaływania turbin i oddziaływania hałasu z turbin wiatrowych podczas eksploatacji elektrowni wiatrowej projekt nr 3 – prowincja Soc Trang
    Autorzy:
    Nguyen, Hieu Minh
    Thanh, Huong Nguyen Thi
    Powiązania:
    https://bibliotekanauki.pl/articles/2172074.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    wind power
    noise
    environmental impact
    wind power plant project No. 3 - Soc Trang province
    energetyka wiatrowa
    hałas
    oddziaływanie na środowisko
    wind power plant project No. 3 - Soc Trang province Vietnam- (miasto Ho Chi Minh, Wietnam)
    Opis:
    Facing climate change, global warming and the depletion of fossil resources such as coal, oil, etc., the development of clean energy sources has become a global trend. Clean energy sources are being exploited and strongly developed globally today, including: solar energy, wind energy, geothermal energy, ocean wave energy, geothermal energy, biomass energy . Vietnam is located in the tropical monsoon climate, with a coastline stretching over 3,000 km, so the potential for wind energy development in Vietnam is extremely large, attracting a lot of investment in wind power projects in Vietnam. current and future, including wind power plant project No. 3 – Soc Trang province. So far, we have only mentioned the benefits and clean, renewable aspects of wind power, but few have mentioned the environmental and human health impacts of wind power plants, especially noise during operation. The paper uses WindPro software 3.1.597 to determine the extent of influence caused by noise emitted by wind turbines during the operation of wind power plants, thereby assessing its impacts on people's health. local people living around the project area and propose remedial measures
    W obliczu zmian klimatu, globalnego ocieplenia i wyczerpywania się zasobów kopalnych, takich jak węgiel, ropa naftowa itp., rozwój czystych źródeł energii stał się światowym trendem. Czyste źródła energii są obecnie eksploatowane i silnie rozwijane na całym świecie, w tym: energia słoneczna, energia wiatru, energia geotermalna, energia fal oceanicznych, energia geotermalna, energia biomasy. Wietnam położony jest w tropikalnym klimacie monsunowym, z linią brzegową rozciągającą się na ponad 3000 km, więc potencjał rozwoju energetyki wiatrowej w Wietnamie jest niezwykle duży, co przyciąga wiele inwestycji w projekty wiatrowe w kraju. Przykładem omawianym a artykule jest elektrownia wiatrowa nr 3 – prowincja Soc Trang. Jak dotąd wspomnieliśmy tylko o korzyściach i czystych, odnawialnych aspektach energii wiatrowej, ale niewielu wspomniało o wpływie elektrowni wiatrowych na środowisko i zdrowie ludzi, a zwłaszcza emisji hałasu podczas pracy. W artykule wykorzystano oprogramowanie WindPro 3.1.597 do określenia stopnia oddziaływania hałasu emitowanego przez turbiny wiatrowe podczas pracy elektrowni wiatrowych, oceniając tym samym jego wpływ na zdrowie ludzi, lokalnych mieszkańców mieszkających w pobliżu obszaru objętego projektem i zaproponować środki zaradcze.
    Źródło:
    Inżynieria Mineralna; 2022, 2; 141--144
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Scattering Processes of Normal and Fluctuating Carriers in ReBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$ (Re = Y, Ho) Single Crystals with Unidirectional Twin Boundaries
    Autorzy:
    Vovk, R. V.
    Obolenskii, M. A.
    Bondarenko, A. V.
    Goulatis, I. I.
    Levy, M. R.
    Chroneos, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047234.pdf
    Data publikacji:
    2007-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.Eh
    72.10.-d
    74.40.+k
    74.72.-h
    Opis:
    The effect of twin boundaries on the normal and fluctuating conductivity of ReBaCuO (Re = Y, Ho) single crystals was investigated. The results indicate that the Lawrence-Doniach theoretical model describes adequately the temperature dependence of the excess conductivity. The twin boundaries are efficient scattering centers for normal and fluctuating carriers. The derived values of the coherence length perpendicular to the ab-planeξ$\text{}_{c}$(0) are in good agreement with those obtained from magnetic measurements for stoichiometric YBaCuO crystals.
    Źródło:
    Acta Physica Polonica A; 2007, 111, 1; 123-128
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustic Attenuation Performance Analysis and Optimisation of Expansion Chamber Coupled Micro-perforated Cylindrical Panel Using Response Surface Method
    Autorzy:
    Alisah, Mohamad Izudin
    Ooi, Lu Ean
    Ripin, Zaidi Mohd
    Yahaya, Ahmad Fadzli
    Ho, Kelvin
    Powiązania:
    https://bibliotekanauki.pl/articles/1945638.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    micro-perforated cylindrical panel
    transmission loss
    boundary element method
    response surface method
    Opis:
    This paper describes the boundary element method (BEM) and the experimental and optimisation studies conducted to understand the potential of expansion chamber coupled micro-perforated cylindrical panel (MPCP) in enhancing the acoustic attenuation for in-duct noise control issues. Owing to the complex structure of the MPCP and to achieve the correct prediction of acoustic attenuation, BEM is adopted on the basis of the Simcenter 3D software to compute the sound transmission loss (TL), As the MPCP is cylindrical in shape with numbers of sub-milimeter holes, additive manufacturing-based 3D printing is utilised for the model prototyping to reduce current design limitation and enable fast fabrication. The TL measurement-based two-load method is adopted for model validation. Subsequently, parametric studies of the MPCP concerning the perforation hole diameter, perforation ratio and depth of air space are carried out to investigate the acoustic performance. Optimisation via response surface method is used as it allows for evaluating the effects of multiple parameters as required in this study. The model validation result shows that the error between the BEM and the measured values is relatively small and shows good agreement. The R-square value is 0.89. The finding from the parametric studies shows that a wider peak attenuation can be achieved by reducing the perforation hole diameter, and one way to increase the TL amplitude is by increasing the air cavity depth. Finally, the optimised MPCP model is adopted to the commercial vacuum cleaner for verification. The sound pressure level of the vacuum cleaner is significantly attenuated within the objective frequency of 1.7 kHz.
    Źródło:
    Archives of Acoustics; 2021, 46, 3; 507-517
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Curcumin Prevents Free Fatty Acid-Induced Lipid Accumulation via Targeting the miR-22-3p/CRLS1 Pathway in HepG2 Cells
    Autorzy:
    Mei, Yuanyuan
    Sun, Xiaoting
    Huang, Shi-Ying
    Wu, Xiaowen
    Ho, Kuo-Ting
    Lu, Liming
    Chen, Chaoxiang
    Li, Jian
    Liu, Jingwen
    Li, Guiling
    Powiązania:
    https://bibliotekanauki.pl/articles/28408450.pdf
    Data publikacji:
    2024-02-13
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    polyphenol
    epigenetics
    liver
    steatosis
    mitochondria
    Opis:
    Dysregulated lipid metabolism in liver is an important hallmark of non-alcoholic fatty liver disease (NAFLD), which may be modulated by dietary polyphenols or microRNAs (miRNAs). However, the underlying epigenetic regulatory mechanism of polyphenols remain unclear. The current study aimed to address how miRNA mediates hepatic lipid metabolic control of curcumin, a polyphenolic food supplement. The results showed that 24 h treatment with 5 - 20 μM curcumin prevented free fatty acid-induced lipid accumulation by around 10 ~ 50% in HepG2 cells, which was attenuated by pre-transfection with 40 nM miR-22-3p mimic for 48 h. In consequence, transfection with 40 nM miR-22-3p inhibitor for 48 h significantly reduced lipid accumulation by around 10%. And 48 h overexpression of miR-22-3p targeting cardiolipin synthase 1 (CRLS1) gene, which encodes a mitochondrial phospholipid synthase, showed a similar regulatory effect. Thus, miR-22-3p and CRLS1 showed opposite effects in modulating lipid metabolism, which probably involved mitochondrial control. In summary, this study demonstrated that curcumin improved hepatic lipid metabolism via targeting the miR-22-3p/CRLS1 pathway. Identification of the epigenetic regulatory mechanism underlying lipid metabolism may thereby facilitate alleviation of metabolic disorders by natural polyphenols.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2024, 74, 1; 59-68
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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