Materials Literature
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Fluid Catalytic Cracking (FCC) catalysts are used to convert heavy oil fractions (boiling points >360°C) into lighter products such as gasoline and liquefied petroleum gas [1].The diffusion rates of feedstock molecules and intermediate products in the FCC catalysts have relevance for the resulting conversion and produ…
Dissolution of liquid Pb inclusions attached to a fixed dislocation in Al 99.5 Pb 0.5 alloy at 525 o C, 542 o C and 543 o C is studied.The dissolving inclusions were observed in-situ using TEM from their initial sizes of about 30 nm until their complete disappearance, Fig. 1.The inclusion sizes as a function of time (…
Telah di lakukan penelitian Carburizing dan Nitriding pada bahan baja bohler K460, baja bohler VCN 150, baja bohler K110 KNL EXTRA, dan baja HSS. Penelitian ini bertujuan untuk mengetahui pengaruh Carburizing dan Nitriding pada kekerasan, unsur kimia dan struktur mikro. Perbaikan sifat mekanis baja karbon sedang untuk…
Telah dilakukan proses termomekanik pada bahan baja BOHLER VCN 150 untuk memperbaiki sifat mekanis bahan yang akan digunakan sebagai mata pisau pemanen sawit. Proses termomekanik dengan memvariasikan pemanasan pada temperatur 700°C, 750°C, 800°C, 850°C dan 900°C dengan dilakukan proses tempa/hammering pada penahanan w…
Perlakuan panas (heat treatment) didefenisikan sebagai kombinasi operasi pemanasan dan pendinginan yang terkontrol dalam keadaan padat untuk mendapatkan sifat-sifat tertentu pada baja/logam atau paduan. Salah satu metode perlakuan panas tersebut dengan proses quenching dan tempering. Proses ini dilakukan pada temperat…
This paper reports the fabrication of a novel SiO2/zirconium phosphate (ZrP)-B2O3-SiO2 double-layer coating on Cf/SiC composites via brushing and sol-gel routes for achieving better anti-oxidation performance. The composition of raw materials and sintering temperature were studied to explore the possibility of develop…
International audience
Reduction of toxic components in the exhaust gas of diesel engines to the level of the requirements of Euro 6 is a socially important and technically complex problem. The problem of optimal dosing of the urea solution and release free ammonia exception beyond neutralization system is very important when designing a sy…
International audience
In the present overview we analyze the literary data concerning discharges of natural radionuclides into the environment due to functioning of the enterprises of non-nuclear industries. We consider their quantitative characteristics of discharges, the peculiarities of the formation of radionuclide composition of disch…
The method of determination of displacements and stresses in the two-layer anisotropic foundation under the action of normal and tangential surface loadsis given. Orthotropic elastic characteristics of various layers. We consider the version of the full adhesion between the lay- ers. The decision is based on the equat…
Изучен видовой состав остракод в 45 водоемах и водотоках предгорьев Хибин. Определено 26 видов из пяти семейств, восьми подсемейств и 12 родов отряда Podocopa Sars. 12 видов, или 46.2% составляют Candonidae, 8, или 30.8% – Cypridopsidae, 4 – Cyprididae, 1 – Limnocytheridae, и 1 – Cytherideidae. 21 вид впервые указывае…
Rajendran JC Bose,1,2 Yoshie Arai,1 Jong Chan Ahn,1 Hansoo Park,2 Soo-Hong Lee11Department of Biomedical Science, College of Life Science, CHA University, Seongnam, 2Department of Integrative Engineering, Chung-Ang University, Seoul, South Korea Abstract: Nanoparticles have been widely used for nonviral gene delivery.…
مقدمه: کشت و تکثیر سلولهای شبه استخوانی، با هدف استفاده در مطالعات پژوهشی و درمانی همواره از اهمیت زیادی برخوردار است. در این بین، مطالعات نشان داده است که کشت سلولها در یک محیط سه بعدی با هندسهی مهندسی شده، در مقایسه با کشت در محیط دو بعدی، اثرات بهتری بر روی سلولها دارد. هدف از پژوهش حاضر، ساخت و ارزیابی دارب…
Steel is the most important alloy used in oil and gas industry from production and processing to the distribution of refined products. In this research is analyzed the production technology of steel intended for long pipeline used in conveying gas and oil in the natural gas and oil industries. Data from 14 melts were…
The composition of elemental impurities in paediatric powder for suspension (PPS) and double strength tablet (DST) commercial anti-malarial formulations of artemether-lumefantrine (AL) were determined. Six randomly selected PPS and DST products from a list of marketed products were purchased from a registered Pharmacy…
In this study, confined impinging liquid jets are used to produce nanoparticles of carbamazepine (CBZ). The effect of operating parameters, such as the kind of solvent,CBZ concentration, flow rate of solution and antisolvent on particle size, are experimentally investigated. The Scanning Electron Micrograph (SEM) phot…
Nowadays, fibre-reinforced composite materials are widely used in many fields, e.g. automotive and aerospace. Natural fibres such as flax and hemp provide good density specific mechanical properties. Additionally, the embodied production energy in natural fibres is much smaller than in synthetic ones. Within this pape…
The paper contains plane strain analysis of uniformly stretched plate working in creep condition. The plate contains initial defects in forms of central and/or edge cracks working in mode I. These cracks are modelled by attributing critical value of damage parameter to preset points and therefore resulting in stresses…
The paper presents a method for evaluating the quality of the layers in relation to the methods of manufacturing aerological systems on internal and external surfaces of a pipe applicable to production of barrels of small arms. For example, research on technologies of thermo-chemical, developed in the Institute of Pre…