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Propriétés électriques des matériaux diélectriques
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LIFT OFF PROCESS ON FABRICATION OF CARBON MONOXIDE (CO) GAS SENSOR DEVICES
This paper discuss the design and fabrication of microdevice to be used as platform for CO (Carbon monoxide) gas sensor based on tin dioxide (SnO2). The device has been designed on silicon substrate with an active area of 3x3 mm2, and it is consist of bonding pad, heater, electrode, and temperature sensor components.…
SYNTHESIS AND DIELECTRIC PROPERTIES OF FOUR-LAYERED AURIVILLIUS SrBi4Ti4O15 DOPED Nd3+ AND Mn4+
Synthesis of four-layered Aurivillius compound doped with Nd3+ and Mn4+ cations, SrBi3.5Nd0.5Ti4-xMnxO15 (x = 0; 0.5; 1) was carried out using molten salt method with a mixture of Na2SO4/K2SO4 as a flux. The synthesized products were characterized using X-ray diffraction (XRD) and refined by Le Bail technique. The res…
COMPOSITE OF CHITOSAN VANILIN / SULFONATED POLYSTYRENE AS POLYMER ELECTROLYTE MEMBRANES : CATIONIC EXCHANGE CAPACITY, SWELLING DEGREE AND THERMAL PROPERTIES
Research on the preparation and characterization of sulfonated polystyrene (PST) /chitosan vanillin (KV) composite as electrolyte membranes has been conducted in order to investigate the effect of PST and KV composition to its chemical and physical properties. Polystyrene was modified by sulfonation reaction to produc…
HDO REACTION OF THF USING Pt/γ-AL2O3 CATALYST ENRICHED BY ALUMINA : EFFECT OF TEMPERATURE TO PRODUCT DISTRIBUTION, RATE OF REACTION AND DEACTIVATON OF CATALYST
Effect of temperature variation to product distribution, rate and deactivation of catalyst of tetrahydrifuran hydrodeoxygenation have been conducted using Pt/gAl2O3 with aluminum enrichmen. Reaction was conducted by flow system. Product of reaction were analyzed as propane (C3) and buthene derivate (C4). At 350ºC, rea…
THE EFFECT OF CHLORO ACETIC ACID CONCENTRATION AND TEMPERATURE REACTION OF CARBOXYMETHYL CHITOSAN FORMATION ON CATION EXCHANGE CAPACITY AND THERMAL STABILITY
The research on the effect of chloro acetic concentration and temperature reaction of carboxymethyl chitosan formation on cation exchange capacity and thermal stability of polymer have been done. Carboxymethyl chitosan was synthesized by reaction of chitosan and chloro acetic acid with NaOH as catalyst. Polymer was ch…
Terminology for Compounds in the Si-Al-O-N System
This document proposes a nomenclature for aluminium silicon oxide nitrides [In ceramic literature these compounds are generally called oxynitrides. According to IUPAC rules (cf. G. J. Leigh, ed. Nomenclature of Inorganic Chemistry. Blackwell Scientific Publishers, Oxford, UK (1990)) this is not allowed; the systematic…
EFFECTIVENESS OF GELATIN EXTRACTED FROM CHICKEN CLAWS AS A NATURAL PRESERVATIVES FOR BEEF AND FISH
Gelatin has been successfully extracted from chicken clawsby acid hydrolysis method through four major stages of degreasing, demineralization, extraction and drying. The yield of extracted gelatin obtained from wet chicken claws was about 6.21 % (w/w). The effectiveness of gelatin as preservative applied in beef and f…
SYNTHESIS AND CHARACTERIZATION OF COMPLEX DIAQUADIHYDANTOIN NICKEL(II) SULFAT MONOHIDRAT)
The purpose of the research is to find out the synthesis, formula and characteristic of complex of Nickel(II) with hydantoin (hyd). Complex of nickel(II) with hydantoin have been synthesized in 1 : 1 mole ratio of metal to ligan in methanol.The formula of complex which are predicted from analysis of % Ni in complex by…
REVERSE MICROEMULSION OF IGEPAL Co-720 SYSTEM AS MICROREACTOR FOR CdS SYNTHESIS
A Research on CdS synthesis in reverse microemulsion of Igepal CO-720 system has been conducted at various weight ratio of water to surfactant. Igepal CO-720 naturally forms oil in water (o/w) emulsion type due to its high HLB (Hydrophilic -Lipophilic Balance) value. Therefore, in this research the Igepal CO-720 syste…
Hydrochemical Deposition of Cu2S Films Using Thiocarbamide
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ANALYSIS OF STRESSES AROUND ELLIPTICAL CUTOUTS AND INCLUSIONS IN LAMINATED COMPOSITE CYLINDRICAL SHELLS
In thin shell structures, like pressure vessels, high pressure ducts and aircraft fuselages, openings are invariably necessary. Circular openings in structural members are generally preferred in practice due to its simple geometry; but, from a purely structural point of view, there are other configurations which offer…
Acceleration Mechanism of Reduction of Iron Ore-Carbon Composite by Increasing Pressure
Utilization of iron ore-carbon composite enables to play a significant role in reducing CO2 emission from the ironmaking process. However, its efficiency seems to be limited under the condition of the blast furnace. In this study, the effect of pressure from 0.1 to 8.0 MPa on the gasification and reduction of the comp…
Flexible MgO barrier magnetic tunnel junctions
Flexible electronic devices require the integration of multiple crucial components on soft substrates to achieve their functions. In particular, memory devices are the fundamental component for data storage and processing in flexible electronics. Here, we present flexible MgO barrier magnetic tunnel junction (MTJ) dev…
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Pengaruh Waktu dan Media Quenching Pada Metode Hot Dip Galvanizing terhadap Kualitas Produk Lapisan, Struktur Mikro, dan Sifat Kekerasan Baja Karbon Rendah
Baja karbon rendah SPCC-SD dengan standar JIS G3141 merupakan jenis baja yang digunakan untuk pembuatan struktur baja, pipa, otomotif dan fabrikasi lainnya. Baja karbon rendah ini memiliki sifat mekanik yang baik. Akan tetapi baja ini dapat mengalami korosi yang tidak dapat dicegah. Salah satu cara memproteksi baja da…
COMPARISON OF ROLL DEFORMATION IN 4HI ROLLING MILL AND 20 HI ROLLING MILL DUE TO THERMAL STRESSES, OVERLOADING, SPALLING AND DESIGN PARAMETERS
The Rolling mill roll deformation is a serious problem and directly impact on production capacity, Mill Environment, Quality and highly impacting financial viability of the production companies. In this research paper the data taken from three companies, Supreme Rolls and Shears Pvt Ltd Indore, Dee Tee Industries Indo…
The second largest eigenvalue and vertex-connectivity of regular multigraphs
Let $μ_2(G)$ be the second smallest Laplacian eigenvalue of a graph $G$. The vertex connectivity of $G$, written $κ(G)$, is the minimum size of a vertex set $S$ such that $G-S$ is disconnected. Fiedler proved that $μ_2(G) \le κ(G)$ for a non-complete simple graph $G$; for this reason $μ_2(G)$ is called the "algebraic…
Effect of Hybrid Fibers on the Strength Characteristics of Slurry Infiltrated Fibrous Ferrocement with Partial Replacement of Steel Fiber by Polypropylene Fiber and with Partial Replacement of Natural Sand by Manufactured Sand
The concept of tall structures is not new to the world, yet the trend of high-rise construction started in the nineteenth century. High-rise or multi-storey buildings are being constructed either to cater for a growing population or as a landmark to boost a country’s name and get recognition. Any structure, to be reli…