Optimizing the use of complex fluids in foams : a route to outstanding stability
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Materials Literature
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Changes of quantum yield of different quantum dots prepared by different synthetic processes with different surface coatings were measured by secondary method and compared. It was found out that quantum yield of quantum dots strongly depends on pH of reaction mixture, surface coating and purification process.
Adsorption and desorption of methanol on TiO2 was studied extensively theoretically and experimentally because of its potential application in photo-catalysis. However, the structures at wide range of the coverage from submonolayer to saturate adsorption as well as its stability at different temperatures and pressures…
This article reviews the recent advances in UV Raman spectroscopic characterization of catalytic materials. One of the advances is the successful identification of highly isolated transition metal ions incorporated in the framework of microporous and mesoporous materials base on the UV resonance Raman effect. Moreover…
The investigation on dense oxygen permeable ceramic membranes is focused on the single-phase perovskite-type materials in\nthe past decades. Dual-phase ceramic membranes with adjustable oxygen permeability and stability are receiving increasing\nattentions recently. Here, a brief review of dual-phase membrane is prese…
The solubilization of a monoazo disperse dye based on naphthalimide containing an ester group in the presence of DTAB and two gemini cationic surfactants was investigated. The results showed that the solubilization power of gemini surfactants micelles was greater than that of conventional surfactant micelles (DTAB) fo…
سی زوج تخمدان چپ و راست شتر بالغ از کشتارگاه های اصفهان جمع آوری گردید. با استفاده از کولیس ابعاد هر تخمدان شامل طول، عرض و ضخامت آن اندازه گیری و ثبت گردید. جهت مطالعات میکروسکوپی مقاطعی از تخمدان های چپ و راست شتر تهیه و بعد ازشستشو و ثابت کردن در فرمالین، مراحل آماده سازی بافت و رنگ آمیزی با هماتوکسیلین – ائوزین ان…
В статье рассмотрены проблемы рынка ипотечных ценных бумаг. Предложены мероприятия, способствующие его формированию и развитию.
O domínio subterrâneo, composto por uma vasta rede de cavidades e fissuras, alberga um ecossistema peculiar, rico em microendemismos e espécies que exibem adaptações morfofisiológicas à vida em profundidade.Os ecossistemas subterrâneos estão sujeitos a variadas pressões ambientais decorrentes da utilização do solo à s…
The modeling of sound radiation is of fundamental importance for understanding the propagation of acoustic waves and, consequently, develop mechanisms for reducing acoustic noise. The propagation of acoustic waves, are involved in various phenomena such as radiation, absorption, transmission and reflection. The radiat…
The development of an optical fiber corrosion sensor based on the principle of light reflection is presented in this paper. The sensor consists of an optical fiber reflection sensor and a tube/film subassembly, formed by welding a sacrificial metallic film to a steel tube. One side of the sacrificial metallic film is…
The objective of this study was to investigate of possibility of MDF production from successful Eucalyptus Species. Eucalyptus camaldulensis fibers were produced using different levels of steaming time ( 7.5 and 15 minutes), press temprature (170, 180 and 190 ºC ) and press time (3 and 4 minutes) and used for panel ma…
A macromolecular prodrug of didanosine (ddI) for oral administration was synthesized and evaluated for in-vitro drug release profile. Didanosine was first coupled to 2-hydroxy ethyl methacrylate (HEMA) through a succinic spacer to form HEMA-Suc-ddI monomeric conjugate which was subsequently polymerized to yield Poly(H…
به دلیل محدودیت تکنیکهای کاریولوژی و همچنین وجود تعداد زیاد کروموزومهای دارای اندازه نسبتا کوچک در میگوهای خانواده Penaeidae، مطالعه تعداد، ساختار و فرمول کروموزومی آنها کار دشواری است. مطالعه سیتوژنتیکی حاضر با هدف بررسی کروموزومهای میگوی موزی خلیج فارس Penaeus (Fenneropenaeus) merguiensis با استفاده از گسترشها…
In this study, a hyperbranched dendritic additive was used to improve the dyeability of a fibre grade PET. Various samples were prepared in an internal mixer at different concentrations of this additive. DSC was used to study the thermal behavior of the resultant compounded samples. It was shown that Tg of samples dec…
Em estudos realizados anteriormente, verificou-se que o cimento Portland, que e um cimento utilizado em constru ca o civil, tem propriedades semelhantes a s do cimento MTA, de uso odontol o gico, com o diferencial deste apresentar bismuto em sua composi ca o, o que lhe confere radiopacidade. No presente estudo buscous…
Abstract The role of the incident angle of incoming light on the excited modes in rectangular grating at the interface of air and fused silica in Littrow mounting is investigated by the modal analysis.The analysis points out that the optimum effective refractive index difference for two propagating modes varies with t…
Perfect de-NOx over a wide temperature range above 170 C was achieved using a new Pt-catalyst supported on mesoporous silica (Pt/MPS) and a stoichiometric amounts of long-chain hydrocarbons as reducing agents for NOxpurification. Kinetic investigation of the HC-SCR of lean NOx over Pt/MPS, Pt/alumina and Pt/zirconia s…
The paper introduces a three dimensional multidomainboundary element model of a pregnant woman and foetus for the analysis of exposure to high voltage extremely low frequency electric fields. The definition of the differentphysical and geometrical properties of the relevant tissues is established according to medical…
The Molecular beam synthesis and characterization are reported for Y2O3 thin films grown on Al2O3 (0001) substrate. The Y2O3 layer was highly oriented in the [111] direction with predominant orientation relations (111) Y2O3 ‖ (0001) Al2O3 and [110] Y2O3 ‖ [2110] Al2O3, corresponding to a lattice mismatch of ∼20% at th…