Materials Literature
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Various attributes of metamaterials have led to their consideration for engineering metamaterial-inspired structures for a variety of applications. This includes the miniaturization of resonators and their use for improving the performance characteristics of electrically small antennas from the microwave region up thr…
Günümüzde, gelişmiş ve gelişmekte olan ülkelerde endüstriyel atıksulardan rengin azaltılması ve hatta atıksuların endüstriyel tesisin herhangi bir prosesinde tekrar kullanılabilmesi konusunda teşvikler yapılmakta ve bu konudaki çalışmalara ağırlık verilmektedir. Bu sebeple, fizikoimyasal, biyolojik metodlar ve bunları…
由ZrO(NO3)2水解得到的ZrO(OH)2水凝胶经碱液回流老化、焙烧后制备了改性ZrO2载体材料,直接浸渍K2RuO4溶液,经还原后用于催化氨合成反应。并运用X射线衍射(XRD)、CO2 程序升温脱附(CO2-TPD)、X射线荧光光谱 (XRF)、N2物理吸附、H2程序升温还原技术(H2-TPR)和CO化学吸附对其进行了表征,重点考察了催化剂性能与载体性能间的构效关系。结果表明,KOH和NH4OH溶液回流均可提高载体的比表面积,但是KOH回流制备的载体同时还具有较强的碱性,因此,负载钌以后表现出最佳活性。在425 ℃、5 MPa、空速为10 000 h-1条件下,出口氨浓度为5.96%,分别较催化剂K-Ru/ZrO2-NH4O…
La fabricación de envases para medicamentos debe de cumplir normas ópticas, mecánicas y químicas usualmente establecidas por la Agencia de Alimentos y Medicamentos de Estados Unidos (US Food and Drug Administration, FDA). Con el fin de fabricar envases alternativos a los existentes se elaboraron dos nanocompuestos de…
采用柠檬酸络合法,经900 ℃热处理制备了CuAl2O4、CuFe2O4和CuCr2O4三种尖晶石,并进行了甲醇重整性能评价。结合XRD、H2-TPR、SEM和BET等表征,研究了铜基尖晶石的催化特性。结果表明,三种铜基尖晶石的形貌和大小有极大差异,表现出不同的催化性能,CuAl2O4尖晶石获得最优的稳定性和最低的CO选择性,CuFe2O4尖晶石上CO选择性最高且稳定性差,CuCr2O4尖晶石上石墨碳沉积最严重。根据长时间评价结果和表征数据发现,在反应气氛中铜基尖晶石不稳定,通过释放活性铜而起催化作用;同时铜的烧结长大与积炭现象共同影响催化性能。
With the appearance of deregulation, distribution transformer predictive maintenance is becoming more important for utilities to prevent forced outages with the consequential costs. To detect and diagnose a transformer internal fault requires a transformer model to simulate these faults This Paper presents here an app…
The fruiting body of Cordyceps is derived from the pupa or larva of insects infected by the entomopathogenic fungi Cordyceps. The fruiting body has been used as an anti-cancer and anti-inflammatory ingredient in traditional Chinese medicine. The biochemical characteristics of protease isolated from Cordyceps nutans we…
Objective To investigate the effect of luxS inactivation on the oxidative stress of Streptococcus mutans and perform preliminary analysis of potential mechanism.Methods Strains were grown to mid-logarithmic phase and divided into three groups,one was used as control and inoculated into normal TPY medium,and the other…
Paduan aluminium-partikulat keramik komposit meningkatkan sifat mekanik dan fisik paduan aluminium tersebut. Namun kesulitan terbesar adalah masalah mampu membasahi (wettability) dari matriks aluminium (Al) terhadap partikel keramik dan reaksi antar muka antara maktriks dengan partikel. Oleh karena itu telah dilakukan…
Peer-reviewed journal that publishes original research and review articles by authors from different countries, the topics of which cover a wide range of topical issues of physical and mathematical disciplines
Peer-reviewed journal that publishes original research and review articles by authors from different countries, the topics of which cover a wide range of topical issues of physical and mathematical disciplines
Peer-reviewed journal that publishes original research and review articles by authors from different countries, the topics of which cover a wide range of topical issues of physical and mathematical disciplines
Peer-reviewed journal that publishes original research and review articles by authors from different countries, the topics of which cover a wide range of topical issues of physical and mathematical disciplines
Peer-reviewed journal that publishes original research and review articles by authors from different countries, the topics of which cover a wide range of topical issues of physical and mathematical disciplines
Peer-reviewed journal that publishes original research and review articles by authors from different countries, the topics of which cover a wide range of topical issues of physical and mathematical disciplines
Peer-reviewed journal that publishes original research and review articles by authors from different countries, the topics of which cover a wide range of topical issues of physical and mathematical disciplines
In the present work, all polypropylene composites were prepared by film stacking technique using terpolymer and copolymermatrixes and woven fabric reinforcement. Composite sheets were prepared by use of hot press at different processing temperatures of 5,10 and 15 °C over the melting temperature (Tm) of the matrixes i…
In this study, the rice husk flour-plastic waste composites (RPC) was produced from polypropylene (PP) and high density polyethylene (HDPE) wastes with 30 and 50% rice husk flour (RHF) contents. RPC was made by melt compounding and compression moulding processes. The electrical resistivity, thermal stability and tensi…
FIGURE 1. Germanostenolestes lutzi gen. and sp. nov., holotype 59573, photograph of habitus, photograph copyright P.Crabb (Natural History Museum, London).
This chapter contains sections titled: Introduction Paper Chromatography Thin Layer Chromatography Gas Chromatography Liquid Chromatography Ion Chromatography Capillary Electrophoresis Summary References