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    Wyświetlanie 1-11 z 11
    Tytuł:
    ANTI-INFLAMMATORY ACTIVITY AND CYTOTOXICITY OF DIOSGENIN ON LIPOPOLYSACCHARIDES INDUCED RAW 264.7 CELLS
    Autorzy:
    ning, jing
    chang, yu
    wang, ruxia
    lan, zhiwei
    ru, qing
    liu, mingchun
    tian, chunlian
    Powiązania:
    https://bibliotekanauki.pl/articles/895615.pdf
    Data publikacji:
    2020-04-29
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    Diosgenin
    Anti-inflammatory
    lipopolysaccharides
    cytotoxicity
    phagocytosis ability  
    Opis:
    Diosgenin is a steroidal sapogenin compound, and possesses multiple biological activities including anti-inflammatory, anticancer, immunological regulation, and anti-aging. The current study focused on its anti-inflammatory activities and cytotoxicity by analysis of NO production, phagocytosis activity, secretion of TNF-α and IL-6 and cell viability in LPS-induced RAW 264.7 cells. An IC50 value of diosgenin of 2.8 μM was calculated for diosgenin by regression of cell viability from concentrations ranging from 0.01 to 25 μM; this indicated that 0.01, 0.02, 0.04 μM diosgenin could reduce phagocytic activity very significantly (p<0.01) in a dose-dependent manner with no cytotoxic effect on the LPS-induced RAW 264.7 cells. However, there was no significant effect on NO content and secretion of TNF-α and IL-6 after diosgenin treatment. The research revealed that low concentrations diosgenin can directly inhibit cells phagocytosis, with no effect on the release of inflammatory mediators and cytokines. This lays a foundation for screening for a safe dose in research and developent of derivatives and new formulation of diosgenin for its anti-inflammatory effect.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 2; 313-317
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Denseformer for single image deraining
    Autorzy:
    Wang, Tianming
    Wang, Kaige
    Li, Qing
    Powiązania:
    https://bibliotekanauki.pl/articles/24987759.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    artificial intelligence
    convolutional neural network
    image deraining
    sztuczna inteligencja
    sieć neuronowa konwolucyjna
    obraz pojedynczy
    Opis:
    Image is one of the most important forms of information expression in multimedia. It is the key factor to determine the visual effect of multimedia software. As an image restoration task, image deraining can effectively restore the original information of the image, which is conducive to the downstream task. In recent years, with the development of deep learning technology, CNN and Transformer structures have shone brightly in computer vision. In this paper, we summarize the key to success of these structures in the past, and on this basis, we introduce the concept of a layer aggregation mechanism to describe how to reuse the information of the previous layer to better extract the features of the current layer. Based on this layer aggregation mechanism, we build the rain removal network called DenseformerNet. Our network strengthens feature promotion and encourages feature reuse, allowing better information and gradient flow. Through a large number of experiments, we prove that our model is efficient and effective, and expect to bring some illumination to the future rain removal network.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2023, 33, 4; 651--661
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental analysis of interfacial properties of sphere oblique impact with initial spin
    Autorzy:
    Wang, Qing-Peng
    Wang, Zheng-Feng
    Wang, Heng
    Li, De-Feng
    Gao, Xian-Kun
    Xu, Guang-Yin
    Powiązania:
    https://bibliotekanauki.pl/articles/2086967.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    sphere
    spin
    oblique impact
    contact surface
    slip ratio
    Opis:
    Experiments of a sphere oblique impact with and without an initial spin have been carried out to obtain properties of the impact interface. The contact surface is recorded with a piece of thin carbon paper. The interfacial parameters measured are expressed as axis length, contact area and slip ratio. It is found that for the impact between steels the forward spin can make geometrical sizes of the contact surface increase compared with the case of no initial spin, however, just the reverse for the backward spin. The effect of the initial spin becomes more apparent for the impact with a rubber cushion. Whether the initial spin promotes or hinders the sphere sliding depends on the parameters of tangential velocity and force at the interface.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2022, 60, 2; 213--225
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Insight into the Catalytic Mechanism of MFe2O4 (M = Ni, Zn and Co) on the Thermal Decomposition of TKX-50
    Autorzy:
    Hou, Xiaoting
    Zhang, Ming
    Zhao, Fengqi
    Yang, Yanjing
    An, Ting
    Li, Hui
    Pan, Qing
    Wang, Xiaohong
    Zhang, Kun
    Powiązania:
    https://bibliotekanauki.pl/articles/27788010.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    bimetallic iron oxide
    thermal decomposition
    TKX-50
    catalysis
    mechanism
    Opis:
    Synthesized dihydroxylammonium 5,5’-bistetrazole-1,1’-diolate (TKX-50) owes its outstanding application prospects in the field of insensitive solid propellants not only to its high energetic performance but also to its low mechanical sensitivity. Based on the excellent catalytic activity of bimetallic iron oxides for the thermal decomposition of TKX-50, the catalytic mechanism of bimetallic iron oxides (NiFe2O4, ZnFe2O4 and CoFe2O4) for TKX-50 pyrolysis has been explored. For this study, the decomposition process of TKX-50, before and after mixing with the bimetallic iron oxides NiFe2O4, ZnFe2O4 and CoFe2O4 was monitored by in-situ FTIR and gas-phase MS-FTIR instruments. Of the different catalysts, ZnFe2O4 gave the best result for reducing the initial decomposition temperature of TKX-50. Additionally, the activation energy of functional group cleavage of TKX-50, before and after mixing with ZnFe2O4, was also calculated for mechanism analysis from the results of the in-situ FTIR measurements. The results showed that the condensate and the gas-phase decomposition products of TKX-50 remained unchanged after mixing with different catalysts, while the activation energy of tetrazole ring cleavage was significantly reduced. The results of this study will be helpful for the rational design of insensitive solid propellant formulations containing TKX-50, and for understanding the pyrolysis mechanisms of TKX-50 before and after mixing with the efficient catalyst ZnFe2O4.
    Źródło:
    Central European Journal of Energetic Materials; 2021, 18, 2; 223--244
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heuristic energy-saving virtual network embedding algorithm based on Katz centrality
    Autorzy:
    Zhu, Qiang
    Wang, Qing-Jun
    Zang, Mu-Jun
    Wang, Zhen-Dong
    Xiao, Chang
    Powiązania:
    https://bibliotekanauki.pl/articles/141679.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    energy-saving virtual network
    integer linear programming
    Katz centrality
    network virtualization embedding
    virtualization
    Opis:
    Current networks are designed for peak loads leading to low utilization of power resources. In order to solve this problem, a heuristic energy-saving virtual network embedding algorithm based on the Katz centrality (Katz-VNE) is proposed. For solving an energy-saving virtual network embedding problem, we introduce the Katz centrality to represent the node influence. In order to minimize the energy consumption of the substrate network, the energy-saving virtual network embedding problem is formulated as an integer linear program, and the Katz-VNE is used to solve this problem. The Katz-VNE tries to embed the virtual nodes onto the substrate nodes with high Katz centrality, which is effective, and uses the shortest paths offering the best factor of bandwidths to avoid the hot nodes. The simulation results demonstrate that the long-term average energy consumption of the substrate network is reduced significantly, and the long-term revenue/cost ratio, the acceptance rate of virtual network requests, and the hibernation rate of substrate nodes as well as links are improved significantly.
    Źródło:
    Archives of Electrical Engineering; 2020, 69, 3; 595-608
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase Transition, Electronic and Magnetic Properties of CsN and RbN Alloys under Pressure
    Autorzy:
    Wei, Xiao-Ping
    Zhang, Ya-Ling
    Wang, Qing
    Deng, Jian-Bo
    Powiązania:
    https://bibliotekanauki.pl/articles/1401895.pdf
    Data publikacji:
    2015-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.15.Mb
    71.55.Ak
    74.62.Fj
    Opis:
    Using full-potential local-orbital minimum-basis method within density functional theory, we study the phase transition, electronic and magnetic properties of CsN and RbN alloys under external pressure. Concerning the phase transition, we consider three possible crystal structures, including caesium chloride (CsCl), rock salt (RS) and zinc blende (ZB) ones. Calculations of enthalpy exhibit that a pressure-induced phase transition occurs between the three structures, and the phase transitions are difficult to be distinguished under ambient condition (P=0 GPa). As the further increase of pressure, they can be specified clearly. In addition, the electronic calculations indicate that both alloys are half-metallic ferromagnets with a total magnetic moment of 2.000 $μ_{B}$, which is promising for fabricating spin injection devices. Finally, we discuss the electronic and magnetic properties of CsN and RbN under external pressure. A pressure-induced delocalized electronic states and magnetic phase transition are observed in RbN and CsN alloys.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 3; 373-376
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pokolenia, relacje międzypokoleniowe, polityka relacji międzypokoleniowych. Wielojęzyczne kompendium - Edycja 2017
    Generationen, Generationenbeziehungen, Generationenpolitik. Ein mehrsprachiges Kompendium
    Generations, intergenerational relationships, generational policy: A multilingual compendium
    Générations, relations intergénérationelles, politiques de générations. Un abrégé multilingue
    Generaciones, relaciones intergeneracionales, política generacional. Un compendio multilingüe
    Generazioni, relazioni intergenerazionali, politica generazionale. Un compendio multilingue
    Gerações, relações intergeracionais, política geracional. Um compêndio multilíngue
    Nemzedékek, nemzedékek közötti kapcsolatok, nemzedéki politika. Többnyelvű kompendium
    Generații. Politici generaționale și relații intergeneraționale. Un compendiu multilingvistic
    Generationer, relationer mellan generationer, generationspolicy. Ett mångspråkigt kompendium
    Kartos, kartų santykiai, kartų politika. Daugiakalbis kompendiumas
    Kuşaklar, kuşaklararası ilişkiler, kuşak politikasi. Çok dilli bir Rehber
    Generacije, medgeneracijski odnosi, medgeneracijska politika. Kompendij v več jezikih
    Generacije, međugeneracijski odnosi, generacijska politika. Višejezični kompendium
    Покоління (генерації), міжгенераційні відносини, політика міжгенераційних відносин. Багатомовний компендіум
    Поколения, межпоколенческие отношения, межпоколенческая политика. Многоязыковой компендиум
    代，代际关系，代际政策. 多语言版本
    Autorzy:
    Klimczuk, Andrzej
    Lüscher, Kurt
    Hoff, Andreas
    Lamura, Giovanni
    Renzi, Marta
    Oliveira, Paulo de Salles
    Sánchez, Mariano
    Viry, Gil
    Widmer, Eric
    Neményi, Ágnes
    Veress, Enikő
    Bjursell, Cecilia
    Boström, Ann-Kristin
    Rapolienė, Gražina
    Mikulionienė, Sarmitė
    Oğlak, Sema
    Canatan, Ayşe
    Vujović, Ana
    Svetelšek, Ajda
    Gavranović, Nedim
    Ivashchenko, Olga
    Shipovskaya, Valentina
    Lin, Qing
    Wang, Xiying
    Powiązania:
    https://bibliotekanauki.pl/books/2036780.pdf
    Data publikacji:
    2017
    Wydawca:
    Universität Konstanz
    Opis:
    Członkowie Międzynarodowej Sieci Relacji Międzypokoleniowych (Generationes) z dumą prezentują najnowsze wydanie wspólnie opracowanego kompendium "Pokolenia, relacje międzypokoleniowe, polityka relacji międzypokoleniowych". Nowa wersja zawiera 17 języków: angielski, francuski, niemiecki, włoski, hiszpański, polski, portugalski, szwedzki, węgierski, turecki, rumuński, litewski, słoweński (nowy), bośniacki (nowy), ukraiński (nowy), rosyjski (nowy) i chiński (nowy). Układ kompendium został zaprojektowany tak, aby możliwe było stosowanie go do tłumaczenia konkretnych pojęć i terminologii z zakresu badań nad pokoleniami i relacjami międzypokoleniowymi z jednego języka na inny.
    Dostawca treści:
    Biblioteka Nauki
    Książka
    Tytuł:
    Purification and characterization of a novel laccase from the mushroom Pleurotus nebrodensis
    Autorzy:
    Tian, Guo-Ting
    Zhang, Guo-Qing
    Wang, He-Xiang
    Ng, Tzi
    Powiązania:
    https://bibliotekanauki.pl/articles/1039721.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    Pleurotus nebrodensis
    Laccase
    purification
    characterization
    Opis:
    A novel laccase with a molecular mass of 64 kDa and the N-terminal sequence AIGPDDTINF was isolated from fresh fruiting bodies of the mushroom Pleurotus nebrodensis. The purification protocol comprised ion exchange chromatography on DEAE-cellulose, CM-cellulose, and Q-Sepharose, and gel filtration on Superdex 75. The laccase was adsorbed on DEAE-cellulose and Q-Sepharose, but not on CM-cellulose. It demonstrated an optimal temperature of 70°C. The enzyme activity increased steadily over the temperature range 20°C-70°C. There was only a slight reduction in activity at 80°C. However, all activity disappeared following exposure to 100°C for 10 minutes. The enzyme activity changed only slightly over the pH range 3-5, with the optimum at pH 5, but underwent a precipitous decline when the pH was elevated to 6, and was undetectable at pH 8 and pH 9.
    Źródło:
    Acta Biochimica Polonica; 2012, 59, 3; 407-412
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reconstruction of the cranial musculature of the paraceratheriid rhinocerotoid Pappaceras meiomenus and inferences of its feeding and chewing habits
    Autorzy:
    Wang, Hai-Bing
    Bai, Bin
    Gong, Yan-Xin
    Meng, Jin
    Wang, Yuan-Qing
    Powiązania:
    https://bibliotekanauki.pl/articles/945214.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    mammalia
    perissodactyla
    paraceratheriidae
    pappaceras meiomenus
    chewing
    eocene
    china
    Opis:
    The paraceratheriid Pappaceras is the earliest unequivocal rhinocerotoid genus to date, for which the osteological morphology is relatively unique compared to other perissodactyls. Due to the poor preservation condition, paleobiological aspects of Pappaceras (or forstercooperiines), such as chewing and feeding behavior, still remain unknown. Under the Extant Phylogenetic Bracket, the cranial musculature of the newly erected Pappaceras meiomenus has been reconstructed using two-dimensional illustrations, drawings and interpretations of the position and general morphology of cranial muscles for which origins and insertions on the skull are visible. In this study, eight muscles are reconstructed, described and compared to the corresponding muscles known or inferred in other perissodactyls, including the m. levator nasolabialis, the m. levator labii superior, the m. caninus, the m. zygomaticus, the m. masseter, the m. temporalis, the m. buccinator and the m. pterygoid. The reconstruction of the masticatory muscles suggests that Pappaceras meiomenus is strictly herbivorous, probably folivorous, with a primary component of vertical biting. The relatively well-developed m. pterygoid (particularly the m. pterygoideus medialis) indicates that Pappaceras meiomenus is similar to hyracodontids, having more advantages in rotary chewing than other non hyracodontid rhinocerotoids. The configuration of basicranial features shows differentiation between non-hyracodontids and hyracodontids, demonstrating that the well-developed, specialized postglenoid process and the wide glenoid fossa, along with the postcotyloid process of the mandible, serve as a strong fulcrum during the power stroke in non-hyracodontids. Based on its rostral morphology, we suggest that Pappaceras meiomenus was a general browser. The morphology of its incisors and canines further indicate the ability to feed on hard plants, using the postulated puncture-crushing and grinding function.
    Źródło:
    Acta Palaeontologica Polonica; 2017, 62, 2; 259-271
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Small mammal fauna from Wulanhuxiu (Nei Mongol, China) implies the Irdinmanhan–Sharamurunian (Eocene) faunal turnover
    Autorzy:
    LI, QIAN
    WANG, YUAN-QING
    FOSTOWICZ-FRELIK, ŁUCJA
    Powiązania:
    https://bibliotekanauki.pl/articles/945478.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    mammalia
    rodentia
    duplicidentata
    anagalidae
    eocene
    ulan shireh formation
    china
    erlian basin
    Opis:
    Wulanhuxiu, a middle Eocene locality in the Erlian Basin, Nei Mongol (China) has been commonly regarded as belonging to the Ulan Shireh Formation, equated with the Irdin Manha Formation. We recognized two separate mammalian faunas of different age from the beds exposed at Wulanhuxiu. The lower fossiliferous horizon contains an anagalid, uncommon duplicidentate representatives (Gomphos progressus sp. nov., Mimolagus, Erenlagus, and Strenulagus), and diverse perissodactyls. This combination of taxa points to an Irdinmanhan age, but one element of the fauna (Schlosseria) may represent an Arshantan relic. Overall, the assemblage comprises “paleoplacental” mammals mixed with “neoplacentals”. The upper horizon is less species-rich and the only paleoplacentals present are scarce creodonts. However, this horizon is marked by abundant remains (including postcranial material) of the lagomorph Gobiolagus and by the presence of an advanced form of Gobiomys (Rodentia), and is most probably Sharamurunian in age. Thus, Wulanhuxiu documents replacement, albeit incomplete, of paleoplacentals by neoplacentals in the Chinese Eocene record.
    Źródło:
    Acta Palaeontologica Polonica; 2016, 61, 4; 759-776
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of a hindered amine light stabilizer on the aging behavior of moisture-curable polyurethane as a cultural relics consolidant
    Wpływ aminowego stabilizatora światła z zawadą przestrzenną na starzenie utwardzanego wilgocią poliuretanu stosowanego jako konsolidator zabytków
    Autorzy:
    Zhao, Xing
    Wang, Liqin
    Guo, Lang
    Ma, Yanni
    Wang, Ziming
    Niu, Qing
    Powiązania:
    https://bibliotekanauki.pl/articles/947112.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    moisture-curable polyurethane
    hindered amine light stabilizer HALS 770
    consolidant
    cultural relics
    aging
    light stabilizer
    poliuretan utwardzany w kontakcie z wilgocią
    aminowy stabilizator światła HALS 770
    konsolidator
    relikty kulturowe
    starzenie
    stabilizator światła
    Opis:
    This paper aims to study the effect of a hindered amine light stabilizer (HALS 770), on the aging behavior of moisture-curable polyurethane (MCPU). MCPU is specifically developed by ourselves for the reinforcement of fragile organic cultural relics in high-humidity environments, but its aging resistance is insufficient. To improve the aging resistance of MCPU, HALS 770 was used to prepare a modified MCPU (MMCPU). A colorimeter, an infrared spectrometer and a thermal analyzer were used to characterize the color and structure changes of MCPU and MMCPU during aging and to determine their aging kinetics. The results show that the activation energy for the thermal decomposition increased from 91–109 kJ/mol to 135–151 kJ/mol. When the color change is used as the indicator for aging, the lifetime of MMCPU under UV aging is 133% longer than that of MCPU, the lifetime of MMCPU under thermal aging at 293 K is 41.3 times that of MCPU. The addition of HALS 770 to MCPU significantly inhibits the aging behavior.
    Zbadano wpływ dodatku aminowego stabilizatora światła z zawadą przestrzenną (HALS 770) na starzenie się poliuretanu utwardzanego w kontakcie z wilgocią (MCPU). MCPU opracowano specjalnie do wzmacniania delikatnych organicznych zabytków kultury w środowiskach o dużej wilgotności, jednak jego odporność na starzenie jest niewystarczająca. W celu zwiększenia odporności na starzenie MCPU modyfikowano (otrzymano MMCPU) dodatkiem aminowego stabilizatora światła z zawadą przestrzenną (HALS 770). Zmiany koloru, przyjęte jako wskaźnik starzenia, i struktury MCPU oraz kinetykę procesu oceniano z wykorzystaniem kolorymetru, spektrometru podczerwieni i analizatora termicznego. Wyniki wskazują, że dodatek HALS 770 w istotnym stopniu hamuje procesy starzenia MCPU – stwierdzono zwiększenie energii aktywacji rozkładu termicznego, z 91–109 kJ/mol MCPU do 135–151 kJ/mol – MMCPU. MMCPU w procesie starzenia UV był o 133% stabilniejszy niż MCPU i 41,3 razy bardziej odporny na starzenie termiczne w 293 K.
    Źródło:
    Polimery; 2020, 65, 4; 297-303
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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