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Tytuł:
Visualization of Atmosphere Information for Distance Education System Based on Fuzzy Inference Using Customized Knowledge
Autorzy:
Ohnishi, K.
Garcia-Sanchez, J. A.
Tang, Y.
Dong, F.
Hirota, K.
Powiązania:
https://bibliotekanauki.pl/articles/385123.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
distance education
visualization
fuzzy inference
atmosphere
POMS
Opis:
A distance education system is designed based on fuzzy inference, where visualized atmosphere information is shared by all learners in a virtual classroom. It provides high aspirations, low isolated feeling, low stress, and high affinity to learners, and offers learner’s psychological information, individual difference information, and hints of system improvement to the system manager. The effect of visualized atmosphere information in the learner’s psychological states is confirmed by T score of POMS test for 15 graduate students using CAI contents, and comparison experiment with traditional distance education. The proposal of atmosphere information presentation of virtual classroom provides a first step in establishing Education Academy beyond Space Time (EAST).
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2015, 9, 3; 18-24
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The expression profile of miR-222b-5p/MAPK10 in spleens of SPF chickens infected with REV-SNV at 28-42 dpi
Autorzy:
Jiang, H.
Gao, S.
Mao, M.
Diao, Y.
Tang, Y.
Hu, J.
Powiązania:
https://bibliotekanauki.pl/articles/2087117.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
reticuloendotheliosis virus strain SNV
RLRs signaling pathway
gga-miR-222b-5p
mitogen-activated protein kinase 10
a dual-luciferase reporter gene experiment
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 3; 439-443
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of polyacrylic acid on the surface properties of calcite and fluorite aiming at their selective flotation
Autorzy:
Zhang, C.
Gao, Z.
Hu, Y.
Sun, W.
Tang, H.
Yin, Z.
He, J.
Guan, Q.
Zhu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/110577.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
calcite
fluorite
selective flotation
polyacrylic acid
Opis:
In this study, the polyacrylic acid (PAA) was studied as a selective depressant for calcite in the selective flotation of fluorite and calcite, and the implications of this process for the separation of fluorite ore were studied using micro-flotation tests, and the results were analyzed with Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) analyses. The flotation tests indicated that the preferential adsorption of PAA onto calcite rather than sodium oleate (NaOl) could selectively depress the flotation of calcite, allowing its separation from fluorite at pH 7. The zeta potential of calcite became more negative with the addition of PAA rather than with NaOl. However, the characteristic features of PAA adsorption were not observed for fluorite, suggesting that NaOl preferentially adsorbed on the surface of fluorite, or that PAA could be replaced by NaOl on the fluorite surface. FT-IR and XPS analysis were utilized to obtain a better understanding of the mechanism by which PAA was more strongly adsorbed on the calcite surface than NaOl. This was revealed to occur through chemical bonding between the carboxyl group of PAA and the hydroxyl groups of the Ca species on the calcite surface, modifying the structure of the adsorbed layer. A possible adsorption mechanism, along with a postulated adsorption mode for the surface interaction between PAA and calcite, is proposed.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 3; 868-877
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protective effect of lithium chloride on pulmonary injury caused by Actinobacillus pleuropneumoniae via inhibition of GSK-3β-NF-κB-dependent pathway
Autorzy:
Zhang, Y.
Xu, W.
Tang, Y.
Huang, F.
Powiązania:
https://bibliotekanauki.pl/articles/16539075.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
porcine contagious pleuropneumonia
mouse model
lithium chloride
toll-likereceptor 4
GSK-3β-NF-κB-dependent pathways
Opis:
Porcine contagious pleuropneumonia (PCP) is a very serious respiratory disease which is difficult to prevent and treat. In this study, the therapeutic effects of lithium chloride (LiCl) on PCP were examined using a mouse model. A mouse model of PCP was established by intranasal infections with Actinobacillus pleuropneumoniae (App). Histopathological analysis was performed by routine paraffin sections and an H-E staining method. The inflammatory factors, TLR4 and CCL2 were analyzed by qPCR. The expression levels of p-p65 and pGSK-3ß were detected using the Western Blot Method. The death rates, clinical symptoms, lung injuries, and levels of TLR-4, IL-1ß, IL-6, TNF-α, and CCL2 were observed to decrease in the App-infected mice treated with LiCl. It was determined that the LiCl treatments had significantly reduced the mortality of the App-infected cells, as well as the expressions of p-p65 and pGSK-3ß. The results of this study indicated that LiCl could improve the pulmonary injuries of mice caused by App via the inhibition of the GSK-3β-NF-κB-dependent pathways, and may potentially become an effective drug for improving pulmonary injuries caused by PCP.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 1; 35-44
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation, characterization of a ceria loaded carbon nanotubes nanocomposites photocatalyst and degradation of azo dye Acid Orange 7
Autorzy:
Wen, T.
Tang, Y.-B.
Mo, B.-Y.
Powiązania:
https://bibliotekanauki.pl/articles/204686.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Carbon nanotubes
ceria
nanocomposites photocatalyst
preparation
acid orange 7
Opis:
A ceria loaded carbon nanotubes (CeO2/CNTs) nanocomposites photocatalyst was prepared by chemical precipitation, and the preparation conditions were optimized using an orthogonal experiment method. HR-TEM, XRD, UV-Vis/DRS, TGA and XPS were used to characterize the photocatalyst. Nitrogen adsorption-desorption was employed to determine the BET specifi c surface area. The results indicated that the photocatalyst has no obvious impurities. CeO2 was dispersed on the carbon nanotubes with a good loading effect and high loading effi ciency without agglomeration. The catalyst exhibits a strong ability to absorb light in the ultraviolet region and some ability to absorb light in the visible light region. The CeO2/CNTs nanocomposites photocatalyst was used to degrade azo dye Acid Orange 7 (40 mg/L). The optical decolorization rate was 66.58% after xenon lamp irradiation for 4 h, which is better than that of commercial CeO2 (43.13%). The results suggested that CeO2 loading on CNTs not only enhanced the optical decolorization rate but also accelerated the separation of CeO2/CNTs and water.
Źródło:
Archives of Environmental Protection; 2016, 42, 2; 12-19
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pre-concentration of vanadium-bearing mica from stone coal by roasting-flotation
Autorzy:
Tang, J.
Zhang, Y.
Bao, S.
Liu, C.
Powiązania:
https://bibliotekanauki.pl/articles/109373.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
roasting
flotation
vanadium bearing mica
stone coal
Opis:
In China, stone coal is an important source of vanadium. The use of roasting–floatation for the pre-concentration of vanadium bearing mica from vanadium bearing stone coal was investigated based on its mineralogical characteristics. The results showed that the vanadium occurred in mica minerals and the main gangue minerals were coal, calcite, and quartz. The pre-concentration process comprises three key steps: roasting, desliming, and flotation. The coal was completely removed by roasting at 700 °C for an hour. Slime was concentrated and the subsequent flotation pulp was improved by desliming. Calcite was removed by reverse flotation and mica was concentrated by positive floatation. During the process, the grade of V2O5 was increased from 0.71% to 1.14%, and 46.18% of the tailings were rejected. The leaching rate of vanadium was increased from 30.49% of raw ore to 69.15% of the concentrate which was an increase of about 40% at the same leaching process. This technique may promote the efficient utilization of stone coal resources.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 1; 402-412
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Interaction of Resonance And Bragg Scattering Effects for the Locally Resonant Phononic Crystal with Alternating Elastic and Fluid Matrices
Autorzy:
Yuan, B.
Chen, Y.
Jiang, M.
Tang, S.
He, M.
Tu, M.
Powiązania:
https://bibliotekanauki.pl/articles/177103.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
locally resonant phononic crystals
effective speed of sound
coupling band gaps
underwater acoustic materials
Opis:
Three-dimensional (3D) locally resonant phononic crystals (LRPCs) are studied with the aim of optimising the sub-wavelength band gaps of such composites. By analysing their effective acoustic properties, it has been found that the effective acoustic speed of the composite will drop to zero when local resonance arise, and will increase monotonically when Bragg scattering effects occur. Moreover, if the matrix is a low-shear-speed medium, local resonators can significantly reduce the effective acoustic speed of the composite and, therefore, lower the frequency where Bragg scattering effects occur. Hence, a specific LRPC with alternating elastic and fluid matrices is proposed, whose resonance and Bragg gaps are already close in frequency. The fluid matrix behaves as a wave filter, which prevents the shear waves from propagating in the composite. By using the layer-multiple-scattering theory, the coupling behaviour of local resonance and Bragg scattering band gaps has been investigated. Both gaps are enhanced when they move closer to each other. Finally, a gap-coupled case is obtained that displays a broad sub-wavelength band gap. Such proposal excels at the application of underwater acoustic materials since the arrangement of structure can be handily adjusted for tuning the frequency of coupled gap.
Źródło:
Archives of Acoustics; 2017, 42, 4; 725-733
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation of stress-relief effects of protective layer extraction
Symulacja numeryczna skutków odprężenia warstwy zabezpieczającej w trakcie jej wybierania
Autorzy:
Jia, T.
Zhang, Z.
Tang, C.
Zhang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/219293.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
warstwa ochronna
odprężanie
symulacje numeryczne
strefa wycieku
protective layer
stress relief
numerical simulation
leakage zones
Opis:
Field test and laboratory analog model test on the stress-relief effects of protective layer extraction are time-consuming and laborious. In this paper, on the basis of full consideration of rock heterogeinity and in combination with gas geology at Pingdingshan Mine 5, a numerical model was estalished with the gas-solid coupling rock failure process analysis system RFPA-Gas to simulate the stress variation law, roof and floor deformation, fracture evolution law, displacement in the protected seam, change in gas permeability and gas migration law during protective layer extraction. The simulation results repoduced stress variations in coal and rock strata, roof and floor deformation and fracture evolution process during protective layer extraction. The movement of rock strata were characterized by upper three zones and lower two zones: caving zone, fracture zone and bending subsidence zone in the vertical direction in the overlying strata; floor deformation and failure zone and elasto-plastic deformation zone in the vertical direction in the underlying strata. It showed that stress relief occurred in the protected seam, which led to vertical and horizontal displacements, significant increase in gas permeability, gas desorption and migration. Hence, the outburst threat in the protected seam was eliminated. Meanwhile, with comprehensive analysis of variaition of stress state, deformation characteristics and fracture distribution in coal seam and with consideration of changes in gas leakage rate, gas pressure and permeability, according to gas leakage rate, the floor strata of the protecive layer were divided into four leakage zones. They corresponded to four zones with different stress states and fracture development: original leakage zone - slow reducing leakage zone - dramatic increasing leakage zone- steady increasing leakage zone. This classification provides a clear direction for gas control in the protective layer. The simulation results are in good agreement with the stress-relief effects in field.
Badania terenowe oraz modelowanie w warunkach laboratoryjnych skutków odprężenia warstwy zabezpieczającej w trakcie wydobycia są niezwykle czasochłonne i skomplikowane. Uwzględniając niejednorodność skał i wykorzystując dane geologiczne i o obecności gazów w kopalni Pindingshan 5, opracowano model numeryczny pękania skał w układzie gaz-ciało stałe w oparciu o analizę układu RFPA-Gaz. Model wykorzystano do symulacji zmian naprężeń, odkształceń stropu i spągu, propagacji pęknięć, przemieszczeń w pokładach zabezpieczonych, zmian w przepuszczalności gazów oraz migracji gazów w trakcie wybierania warstwy zabezpieczającej. Wyniki symulacji odwzorowują zmiany naprężeń, odkształceń stropu i spągu, propagacji pęknięć w trakcie wybierania warstwy ochronnej. Ruchy warstw górotworu scharakteryzowano poprzez analizę trzech stref nadkładu i dwóch stref lezących poniżej: w warstwach nadkładu: strefy zawału, strefy spękań oraz strefy osiadania (przemieszczenia w kierunku pionowym), w warstwach leżących poniżej: strefy odkształcenia i pękania spągu, oraz strefy odkształceń elastyczno- plastycznych w kierunku pionowym. Wykazano, że odprężanie miało miejsce w pokładzie zabezpieczającym, co prowadziło do powstania przemieszczeń pionowych oraz poziomych, zanotowano także znaczny wzrost przepuszczalności gazów, desorpcji gazów oraz ich transportu. Z tych względów zagrożenie wybuchem w pokładzie ochronnym zostało wyeliminowane. Całościowa analiza zmian stanu naprężenia, charakterystyki odkształceń i rozkładu pęknięć w pokładzie węgla przeprowadzona została dla czterech stref przecieku gazów, wydzielonych w oparciu zmiany natężenia wypływu gazów, ciśnienia gazów oraz przepuszczalności w odniesieniu do natężenia przepływu gazu w spągu w warstwie ochronnej. Te cztery strefy odpowiadały czterem strefom w których zanotowano odmienne stany naprężeń i rozkładu spękań: pierwotna strefa wycieku, powoli zmniejszająca się strefa wycieku, gramatycznie powiększająca się strefa wycieku i stopniowo powiększająca się strefa wycieku. Powyższa klasyfikacja dostarcza wyraźnych wytycznych dla prowadzenia kontroli wycieku gazu w warstwach ochronnych. Wyniki symulacji skutków odprężania wykazują dużą zgodność z wynikami badań terenowych.
Źródło:
Archives of Mining Sciences; 2013, 58, 2; 521-540
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Knitted silk mesh-like scaffold incorporated with sponge-like regenerated silk fibroin/collagen I and seeded with mesenchymal stem cells for repairing Achilles tendon in rabbits
Autorzy:
Tang, L.
Yang, Y.
Li, Y.
Yang, G.
Luo, T.
Xue, Y.
Zhang, W.
Powiązania:
https://bibliotekanauki.pl/articles/306523.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ścięgno Achillesa
kolagen
komórki macierzyste
szpik kostny
Bombyx mori silk
regenerated silk fibroin
collagen I
bone marrow-derived mesenchymal stem cells
weft-knit
Achilles tendon action
Opis:
A scaffold knit with natural sericin-free silk fibroin fiber possesses desirable mechanical properties, biocompatibility, ease of fabrication, and slow degradability. However, regenerated silk fibroin degrades faster than natural silk. In this study, natural silk fibroin fiber mesh-like scaffolds were prepared by a weft-knitting method and the pores were filled with sponge-like regenerated silk fibroin-collagen I. The microporous sponge and mesh-like scaffolds were fused to achieve gradient degradation of the scaffolds, and rabbit bone marrow mesenchymal stem cells (BMSCs) were seeded onto the scaffolds to form scaffold–BMSCs composites. The composites were implanted into gap defects made in the rabbit Achilles tendon. Twenty weeks after implantation, histological observation showed that tendon-like tissue had formed, collagen I mRNA was expressed, abundant collagen was generated, and that there was no obvious degradation of silk. The maximum load of the neo-Achilles tendon was 62.14% that of the natural Achilles tendon. These outcomes were superior to those obtained in the group implanted with a scaffold without BMSCs. These findings suggest the feasibility of constructing tissue-engineered tendons using weft-knitted silk scaffolds incorporated with sponge-like regenerated silk fibroin/collagen I and seeded with BMSCs, and show potential of the scaffold–BMSCs composites to repair Achilles tendon defects.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 3; 77-87
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Josephson Voltage Metrology for Watt Balance Experiments at NIST
Autorzy:
Tang, Y.-H.
Powiązania:
https://bibliotekanauki.pl/articles/114716.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
Josephson voltage standard
Planck constant
programmable Josephson voltage standard
International System of Units (SI)
watt balance
uncertainty
Opis:
The Planck constant, h, is one of the seven fundamental constants proposed to redefine the SI. It has been measured by the watt balance experiments since the 1980s. In its early days, the watt balance experiment played a vital role in determining the Josephson constant KJ-90 which was adopted internationally on January 1, 1990. The development of Josephson technology, especially the implementation of the Programmable Josephson Voltage Standard (PJVS) in voltage metrology has improved the uncertainty of voltage measurement in the watt balance experiment by more than two orders of magnitude. The Josephson voltage measurement in the watt balance experiment plays an important role in the proposed SI redefinition based on a set of fundamental constants. This paper will describe a brief history from the original NIST-1 watt balance in 1980s up to the most recent development of the NIST-4 watt balance. We will also discuss the role of voltage metrology in the watt balance experiments and the impact of the SI redefinition to the voltage metrology in the future.
Źródło:
Measurement Automation Monitoring; 2016, 62, 2; 42-45
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Hexaamidocyclotriphosphazene on the Flame Retardancy of Paper
Wpływ hexaamidocyklotrifosfazenu na zmniejszenie palności papieru
Autorzy:
Tang, L.
Bi, W.
Ke, Y.
Song, H.
He, W.
Liu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/232082.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
hexaamidocyclotriphosphazene
flame retardancy
paper
flame retarded paper
hexaamidocyklotrifosfazen
ognioodporność
palność papieru
Opis:
In this paper, the flame retardancy of hexaamidocyclotriphosphazene (HACTP) in paper was studied by limiting oxygen index measurement, the vertical burning test and cone calorimetry test. Meanwhile the mechanism was discussed by the analysis of residues obtained in the cone calorimeter test. The experimental results revealed that HACTP had excellent flame retardancy in paper.
Badano zmniejszenie palności papieru stosując hexaamidocyklotrifosfazen (HACTP) poprzez indeks tlenowy, test pionowego palenia, i test kalorymetru stożkowego. Badano również mechanizm ograniczenia palności poprzez analizę resztek uzyskanych z testu kalorymetru stożkowego. Eksperymenty wykazały, że HACTP ma wybitny wpływ na zmniejszenie palności papieru.
Źródło:
Fibres & Textiles in Eastern Europe; 2016, 4 (118); 148-152
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental study on fracturing coal seams using CaO demolition materials to improve permeability
Autorzy:
Tang, Y.
Yuan, L.
Xue, J
Duan, C.
Powiązania:
https://bibliotekanauki.pl/articles/92132.pdf
Data publikacji:
2017
Wydawca:
Główny Instytut Górnictwa
Tematy:
soundless chemical demolition
coal seam
gas drainage
CaO
pokład węgla
odmetanowanie
Opis:
Currently, methane gas disasters in underground coal mines are a major problem which seriously threatens safe mining. This study employed soundless chemical demolition for fracturing coal seams with low permeability. Additionally, the fracturing theory and failure mechanisms of soundless chemical demolition agents were investigated. Materials such as CaO, naphthalene-based water reducer, sodium gluconate and silicate cement were used to prepare the novel soundless chemical demolition agent, whose optimum proportion was discovered to be 90:3:5:7 by carrying out orthogonal experiments. The innovative demolition agent cracked briquettes and the maximum width of cracks reached 16.33 mm, showing significant potential for improving the permeability of coal seams.
Źródło:
Journal of Sustainable Mining; 2017, 16, 2; 47-54
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Evidence for Jahn-Teller Transition in a Fe(II)Fe(III) Bimetallic Oxalate
Autorzy:
Tang, G.
He, Y.
Xu, F.
Zhang, Q.
Powiązania:
https://bibliotekanauki.pl/articles/1400401.pdf
Data publikacji:
2013-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Xx
76.80.+y
Opis:
Bimetallic oxalate ${[N-(n-C_4H_9)_4][FeFe(C_2O_4)_3]}_{n}$ has been investigated by the Mössbauer spectroscopy. The Mössbauer studies confirm that high-spin Fe(III) (S=5/2) and Fe(II) (S=2) ions are present in the compound. These spectra above 60 K consist of three quadrupole doublets, indicating that there are three different Fe sites in the material. The Mössbauer results reveal that spontaneous magnetization of Fe(II) sublattices increases more steeply than that of Fe(III) sublattices as the temperature decreases from $T_{C}$. Great increase of quadrupole splitting at 50 K provides compelling evidence for the predicted Jahn-Teller transition.
Źródło:
Acta Physica Polonica A; 2013, 123, 1; 118-120
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation on Curing Properties and Kinetics of Isophthalonitrile Oxide
Autorzy:
Fan, Y.
Tang, C.
Hu, Q.
Lei, Y.
Huo, J.
Powiązania:
https://bibliotekanauki.pl/articles/780045.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
N,N-dihydroxybenzene-1,3-dicarboximidoyl dichloride
kinetics
elastomer
synthesis
1,3-dipolar cycloaddition
Opis:
N,N-dihydroxybenzene-1,3-dicarboximidoyl dichloride was synthesized from benzene-1,3-dicarboxaldehyde and characterized by fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance  1H and 13C NMR). The elastomer was prepared through the 1,3-dipolar cycloaddition of reaction between liquid polybutadiene (LPB) and isophthalonitrile oxide in this work. The tensile strength of different elastomer was enhanced from 0.14 MPa to 0.33 MPa as the elongation at break decreased from 145% to 73%, and the modulus increased from 0.09 kPa to 0.47 kPa. The parameters of kinetic indicated that the curing reaction was first order reaction and the apparent activation energy of each curing system was less than 10.10 kJ/mol when the content of N,N-dihydroxybenzene-1,3- dicarboximidoyl dichloride was increased from 7% to 12%. These results suggested that nitrile oxides achieved curing of polymer binders at room temperature and this work had definite guiding significance for the application of nitrile oxides in polymer binders.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 3; 37-46
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of thermal treatment on colour and texture of Typha latifolia L.
Autorzy:
Zang, M.
Zhou, Y-H.
Wang, S.
Tang, J.
Powiązania:
https://bibliotekanauki.pl/articles/25390.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
Through the analysis of the residual activity of peroxidase (POD), chromatic aberration, shear intensity and shear power, the effects of different thermal treatment times at 100°C on the POD, surface colour and texture of Typha latifolia L. were evaluated. The results showed that the activity of POD decreased with the increasing thermal treatment time at 100°C. The regeneration amount of POD increased first for some time and then started to decrease with the treatment time. Thermal treatment times 1.0 and 1.5 min at 100°C exhibited maximum regeneration of POD for the samples stored at 20 and 37°C, respectively. The sample had acceptable texture and surface colour when they were treated at 100°C for 4 min because the POD in the sample was inactivated to an acceptable level.
Źródło:
International Agrophysics; 2012, 26, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
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