Materials Literature
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Took the heavy cylinder rolling mill as subject investigated, which is used to produce the nuclear power cylinder, the large hydrogenation reactor cylinder and the coal liquefaction reactor cylinder. And the cylinder rolling mill has two drive rolls which is different from conventional ring rolling mill. The rolling t…
The use of nanocarriers to deliver drugs to tumor tissue is one of the most important strategies in cancer therapeutics. Recently, gold nanorods (GNRs) have begun to be used in cancer therapy because of their unique properties. The purpose of this study was to show the potential that GNRs have against human nasopharyn…
Transverse flux switched reluctance motors enable the application of a large MMF per pole to a machine with a large number of poles. This paper will investigate the difficulties of building these machines and their advantages and shortcomings. Electrical, magnetic and mechanical difficulties are investigated and ways…
Nanoscale manipulation of properties of drug delivery systems (DDSs) provides improved control over the pharmacokinetics and pharmacodynamics of encapsulated drugs relative to free drugs. This article summarizes the preparation and therapeutic applications of paclitaxel–gelatin nanoparticles (PGNs) (Type B, 75 Bloom)…
Owing to the volatilization of isopropanol (IPA), instability in the alkaline texturization of monocrystalline silicon has been a big problem for a long time. Many additives were adapted to replace IPA, such as high boiling point alcohols. In this experiment, as a new attempt, sodium lauryl sulfate (SDS), a type of an…
Abstract In order to obtain nanopatterned surfaces, natural allophane particles originating from Japanese soils were immobilized as single particles on Si wafer substrates.When derived from aqueous suspensions, only a few nanoparticles were deposited and detected on the surface due to the weak adsorption of allophanes…
Multi-walled carbon nanotubes were obtained by catalytic chemical vapor deposition. Ethylene was applied as the carbon source and nanocrystalline iron without support was used as the catalyst. In order to remove amorphous carbon, the samples were reduced under hydrogen atmosphere. As a result of this process cementite…
Abstract. This paper presents an analysis allowing for the determination of the differential equation describing the circuit of the active filter inverter output current control with an additional measurement of input voltage. The resulting equation allows to determine the conditions that ensure stable operation of th…
Ingeniería Investigación y Tecnología es una publicación trimestral, arbitrada, de investigación científica y tecnológica editada e impresa por la Facultad de Ingeniería de la UNAM. Su propósito es difundir información y conocimientos originales e inéditos relacionados con la ingeniería. Es un espacio para profesores,…
The effect of cerium and/or gold addition to a manganese oxide which was greatly active in CO oxidation was studied. The catalysts obtained by this way were characterized by N2 adsorption, XRF, XRD and TPR, and their catalytic activity was measured in the CO oxidation reaction. The pure MnOx catalyst was active in the…
A description of a novel rolling contact fatigue test for evaluation of bearing steel characteristics is presented. Unlike traditional approaches where bearings are tested until failure, the proposed testing method is based on monitoring the material response during testing. The measurement principles are based on cha…
Current understanding of rolling contact fatigue is reviewed. The stress developed in the subsurface as a function of loading conditions, along with the resulting microstructural changes are described. Focusing on the dissolution of hardening phases and the occurrence of recovery and recrystallization, the relationshi…
The study of the transmission of electromagnetic waves through periodically perforated opaque screens, even though being a very classical topic, has received a renewed attention along the last fifteen years because of the discovery of the exciting phenomenon so-called extraordinary optical transmission [1]. The transm…
Frequency scanning antenna array based on composite right/left handed (CRLH) phased-array feed network is presented. The proposed array design method enables continuous beam scanning obtained through the feeding network design, which is different from the widely researched CRLH based leaky-wave antennas. It allows an…
In this paper thermal behavior of a 600kW 4200r/min interior permanent magnet synchronous motor (PMSM) with forced ventilation in the stator was analyzed using Fluent. Due to its high power density and compact structure, accurate thermal analysis of PMSM traction machine is of great importance in designing and optimiz…
Heterogeneous photocatalysis using nanostructured semiconductors constitutes one of the emerging advanced oxidation processes (AOP) for destructive oxidation of organic contaminants in water or air. Herein we report the kinetics of potocatalytic degradation of nitrophenols (NPs), namely, o-nitrophenol (ONP), m-nitroph…
Sebagian besar para pengrajin kapal kayu tradisional dalam pembangunan konstruksi kapal tanpa melalui proses rancang bangun atau perencanaan kapal yang sesuai dengan prosedur yang benar, karena pengerjaan bangunan fisik kapal hanya berdasarkan dari keterampilan atau kepandaian dan pengalaman pengrajin kapal yang diper…
In the paper we present adiabatic calorimetry and dielectric spectroscopy results for 2,3-dimethylbutan-2-ol (2,3-DM-2-B), one of the isomers of neohexanol. For 2,3-DM-2-B we have detected the following phase transitions: C2 (249.8 K) C1 (262 K) Is. No glass phase was found. In both crystalline phases C2 and C1 three…
A great disadvantage of switched reluctance machines is the heavy noise emitation, caused by the radial forces in the airgap, which excite the structure to vibrate. Especially the stator vibrations produce heavy noise, when the frequencies of the excited forces correspond to the eigenfrequencies of the stator. Every s…
The use of highly-enriched fuels is an effective method for reducing the number of spent fuel assemblies and improving fuel cycle economics, e.g., with >5 wt% 235U. However, from a criticality safety point of view, such high enrichment levels require a significant investment for the considerable modification of most f…