Materials Literature
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Naringenin (NAR), a natural flavonoid aglycone of naringin has been extensively investigated for its pharmacological activities, including anti-tumor effects. However, its poor bioavailability has been identified as the single most important challenge in oral drug delivery. Based in this condition, it is used nanoenca…
This article shows a study aiming to identify the influence carried out by the supporting way of the working surface in the case of plane oscillating screening device, over the behavior of a solid particle. In order to achieve this, a theoretical study has been conducted by using a simulation program, Working Model 2D…
In this study, the effects of carboxymethyl cellulose-low methyl pectin based edible coatings containing ascorbic acid antioxidant were investigated on optimum immersion time during osmotic dehydration of quince sheets. The selection of coating type was based on natural composition of fruits peel, (i.e cellulose) and…
Abstract The utility of cluster ion beams for x-ray photoelectron spectroscopy (XPS) analysis is just beginning to be explored, making a range of materials accessible that previously could not be analyzed. When combined with a monatomic source, these cluster ion beams will become an essential tool for any materials an…
Conclusions. It was found that enamel of the permanent teeth germs is not mineralized and therefore has insufficient level of caries resistance. Without the use of additional means of prevention level of caries resistance of the permanent teeth germs enamel remains insufficient even after 12 months of the experiment.…
This paper proposes an approach to the design of dispatching control system of the concrete batching plant, which is a set of hardware maintenance, information, mathematical and software for control of technological objects. The proposed system is scalable and can include a control subsystem of mobile concrete plant,…
A 2D bond-breaking model is presented that allows the extraction of the intrinsic line or edge energy, fracture toughness, and strain energy release rate of graphene from measured and calculated 2D Young’s moduli and 2D pristine strengths. The ideal fracture stress of perfect graphene is compared with the critical fra…
Thermal conductivity and performance of the natural composite materials as thermal insulators after exposure to ultraviolet radiation effect are investigated. An accelerated weathering chamber has been manufactured to investigate the ultraviolet radiation effect on composite materials. The composite materials were pre…
A novel methacrylate modified 2-(3-thienyl)ethyl methacrylate (TE-MA) was synthesized, and free radical polymerized and electrochemical polymerized to obtain the precursor polymer polymethacrylate (PMA) functionalized with thiophene (TE-PMA) and PMA modified polythiophene (PTE-PMA), respectively. Structure characteriz…
Microstructures and electrochemical characteristics of La0.7Ce0.3Ni4.2Mn0.9-xCu0.3(W0.42Fe0.58)x (x = 0-0.20) hydrogen storage alloys are systematically investigated. X-ray diffraction and backscattered electron results indicate that the pristine alloy is single LaNi5 phase, while the alloys containing W0.42Fe0.58 con…
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The objective of this research is to investigate the effect of repeated low-velocity impacts experimentally on composite materials in which two types of laminated composite beams are used (2D and 3D woven fabric/lamination (80:20) resin) under repeated impact tests. The tests were performed and exposed to repeat low-v…
نفذ البحث في مختبر زراعة الانسجة النباتية/ كلية الزراعة/ جامعة بغداد للفترة من 1/11/2012 ولغاية عام 30/4/2014. اطراف الافرع بطول 2 سم التي تم الحصول عليها من الشتلات المعقمة لنبات Digitalis Lanata والمشععة بذورها بالجرع (0, 30) كري من اشعة كاما زرعت على وسط MS مضافا اليه 2 ملغم/لتر BA لغرض تحفيز عملية التضاعف الخضري م…
Up to now, different designs have been introduced for measurement beam profile accelerators. Secondary electron emission monitors (SEM) are one of these devices which have been used for this purpose. In this work, a SEM has been constructed to measure beam profile of ES-200 accelerator, a proton electrostatic accelera…
Sang-Eun Park,1,* Jaewon Lee,2,* Taeksu Lee,2 Saet-Byeol Bae,1 Byunghoon Kang,2 Yong-Min Huh,3 Sang-Wha Lee,1 Seungjoo Haam,2 1Department of Chemical and Biochemical Engineering, Gachon University, Gyeonggi-Do, Republic of Korea; 2Department of Chemical Engineering, Yonsei University, Seoul, Republic of Korea; 3Depart…
En este trabajo se presenta un método basado en síntesis asistida por microondas, para la incorporación de nanopartículas de cobalto (Co) y moléculas de trifenilfosfina (Ph₃P), sobre el área superficial de nanotubos de carbono (NTC) para la sintesis del hibrido NTC/Ph₃P/Co. El uso de microondas a potencia constante, p…
En este trabajo se evalúan las propiedades magnéticas y la estructura cristalina de la hexaferrita de estroncio (tipo M) dopada con Gd³⁺. Siguiendo la fórmula GdₓSr₁₋ₓFe₁₂O₁₉ (donde x=0, 0.1, 0.2, 0.3 y 0.4), se sintetizó una serie de hexaferritas mediante molienda de alta energía, empleando mezclas estequiométricas d…
En el presente estudio se evalúa la cinética de difusión del boro en una fundición de hierro gris durante el proceso de borurización base polvo. Esta técnica de endurecimiento superficial produce en el material la formación de una base característica, Fe2B. El tratamiento termoquímico se realizó a las temperaturas de…
El presente trabajo estudia el crecimiento de las capas de nitruros de hierro generadas por el proceso de nitruración en polvo, sobre la superficie de un hierro puro Armco. El tratamiento termoquímico de nitruración en polvo consiste en un polvo rico en nitrógeno (CaCN2), con el que se cubren las piezas que se desean…
En este trabajo se presenta la síntesis y caracterización de la manganita de calcio y terbio (TbₓCa₁₋ ₓMnO₃) la cual fue obtenida mediante el método de síntesis de combustión. Las manganitas fueron obtenidas partiendo de sales precursoras de Ca(NO₃)₂.4H₂O [0.65 M], Mn(NO₃)₂.H₂O [1 M] y Tb(NO₃)₃.5H₂O [0.35 M], usando c…