Nanopoudres de ferrites de cobalt ; propriétés catalytiques électriques et magnétiques
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Study and development of an integrated quartz crystal oscillator
Le besoin croissant de réduction du volume, de la masse et de la consommation des dispositifs électroniques sans pertes deperformances concerne aussi les oscillateurs à quartz utilisés dans les applications métrologiques (bases de temps, capteurs),la téléphonie, la navigation... Dans le cadre de cette problématique, n…
Effect of Dipolar Interaction in Molecular Crystals
We investigate in this paper the ground state and the nature of the transition from an orientational ordered phase at low temperature to the disordered state at high temperature in a molecular crystal. Our model is a Potts model which takes into account the exchange interaction $J$ between nearest-neighbor molecules a…
Regional variation of cotton linter fibers
This work presents the effect of regional variation (Varamin-Tehran, Klibar-Azarbayjan & Nishabor-Khorasan) on the biometry properties of cotton linter fibers in Iran. Results of analysis of variance (ANOVA) indicated that the region had significant effect on the biometry properties of cotton linter fibers. The highes…
Silicon Nanowire Arrays and other Silicon Nanostructures and Their Clinical Applications to Cancer
Point-of-care testing solutions are always desired as a viable option for the rapid and sensitive detection and analysis of disease. Cancer persists to be the most discussed global disease in which prostate, lung, breast and colon cancer are listed to be the high cause for the mortality around the world. New and alter…
Industrial Prospects of the Cosmeceuticals Derived from Marine Mucin
It is well known that every country applies extensive and rigid regulations over cosmetics and drugs, imposed by correspondent government agencies. In contrast, despite the strong controversy caused since this new concept was proposed, there is still no ofcial recognition or legal regulation. A legal framework is man…
Iron and Ethylcellulose Nanoplatforms for Cancer Targeting
In this way, the combined use of inorganic substances (e.g., iron) and/or organic materials (e.g., ethylcellulose) could offer important possibilities in the formulation of drug delivery systems. In this way, the development of inorganic/organic (core/ shell) nanocomposites (i.e., iron/ethylcellulose nanoparticles) ha…
Nanobubbles and Their Putative Application to Cancer Medicine
Current chemotherapy against cancer frequently fails due to the little or almost null specificity of antitumor drugs for malignant cells. Even more advanced anticancer molecules can exhibit a very low accumulation into tumor mass, and an extensive biodistribution into healthy tissues. As a consequence, long-term chemo…
Modication of Hydroxyl and Carboxyl Functional Groups in Proteins
This chapter includes the modication of hydroxyl and carboxyl functions in proteins. The commonality between these functional groups is that they represent different oxidation states of carbon.1 Serine and threonine contain hydroxyl groups, while tyrosine contains a phenolic group (dened as a hydroxyl group bound to…
Silver Nanomedicine and Cancer
Silver salts have been in use for thousands of years in jewellery, cooking utensils, photography and medicine. Colloidal silver in particular is well known for its anti-microbial potential. In 1000 BC, the ancient Greeks used silver vessels for cooking and storage to prevent bacterial overgrowth. In the eighth century…
硅/天然石墨/沥青炭复合材料的合成及其电化学性能
以纳米硅（Si）、天然石墨（NG）和高软化点沥青为前驱体,通过球磨和裂解制备了具有壳核结构的硅/天然石墨/沥青炭（Si-NG/PC）复合材料。考察了球磨时间、球磨速率和物料比等因素对制备材料的组成、结构及其作为锂离子电池阳极电化学性能的影响。结果表明：最佳球磨速率为300 r/min,最适宜的球磨时间为21 h。所制Si-NG/PC复合材料的循环性能随PC含量的增加而提高,但其比容量却随PC含量的增加迅速降低,PC的最佳质量分数为30%。同时,Si-NG/PC复合材料的比容量随Si含量的增加而增大,为获得好的循环性能,纳米Si质量分数应低于35%。在优化条件下制备的Si-NG/PC复合材料在50个循环中表现出高的比容量和优异的循环…
Production of Medium-Chain-Length Poly(3-Hydroxyalkanoates) Using Pseudomonas Citronellolis DSM50332 and P. Putida KT2440 in Continuous Reactor Systems
Thesis (Master, Chemical Engineering) -- Queen's University, 2011-12-19 15:48:21.808
SYNTHESIS AND CHARACTERIZATION OF Mn(II), Ni(II), Fe(III), Co(III), Cu(II), Zn(II) AND Cd(II) COMPLEXES OF o-HYDROXYBENZOIC ACID HYDRAZIDE
A series of complexes of o-Hydroxybenzoic acid hydrazide (HBH) with Mn(II), Ni(II), Fe(III), Co(III), Cu(II), Zn(II), and Cd(II) was synthesized The stoichiometry and structures for the complexes have been established by elemental analysis, electrical conductivity measurements, magnetic moment measurements, and spectr…
离子束溅射制备“日盲”紫外诱导透射滤光片
对＂日盲＂紫外诱导透射滤光片进行了理论设计与分析,并分别优化了离子束溅射法沉积ZrO2、SiO2和Al薄膜的工艺。利用反射与透射光谱反演获得了ZrO2和SiO2薄膜的光学常数,并由JGS1/SiO2/Al/SiO2/air（SAS）样品的变角度椭偏光谱反演精确获得了Al薄膜的光学常数。在此基础上,采用离子束溅射沉积方法并利用上述3种薄膜材料优化制备了＂日盲＂紫外诱导透射滤光片,测量了滤光片的光谱性能。光谱性能分析表明,滤光片的峰值波长位于264nm,峰值透过率大于60.0%,透过峰带宽（FWHM）约为13nm,在300～350nm波段的截止度达到了2.6OD。研究认为制约离子束溅射制备＂日盲＂紫外诱导透射滤光片性能的主要因素是Al…
CeO 2 修饰的透明TiO 2 纳米管电极的电致变色器件
采用电化学沉积法在阳极氧化制备的TiO 2 纳米管阵列管壁上沉积一层CeO 2 纳米颗粒, 再将CeO 2 修饰的透明TiO 2 纳米管阵列薄膜对电极与聚三甲基噻吩变色电极组装成透过型电致变色器件. 实验结果表明: CeO 2 修饰的TiO 2 纳米管阵列薄膜仍保持良好的光透过性, 其电荷存储能力比纯TiO 2 纳米管电极提高了30%. 经CeO 2 修饰的TiO 2 纳米管改善了器件的性能, 与对电极为单一TiO 2 纳米管阵列的器件相比, 其对比度仍保持在38%左右, 其褪色时间由1.3 s缩短为0.8 s. 电致变色器件快速响应得益于纳米管与纳米颗粒组成的复合结构的高比表面积和快速的电荷传输过程.
Functional Groups in Biopolymers and Factors Inuencing Reactivity
The goal of this chapter is to introduce some basic concepts of organic chemistry, which provide the basis for the reactivity of the several functional groups on biological polymers. While the polymers are diverse, the various functional groups are similar and common in organic chemistry, and, thus, there are some gen…
ICCM―18 III．Durability of Polymer Matrix Composites, Fatigue and Life Prediction of Composites
HAZrO Ti-Nb-(Zr, Si) -HA
Chapter 14Records Compliance and Risk Management
The concepts of compliance and risk management have been applied to various methods and strategies of business operations in a wide variety of industries over the past several decades.[1] This entry identifies banking, investment firms, and insurance companies as being particularly sensitive to managing risk and maint…
Um estudo de nano-partículas magnéticas via simulação computacional
Neste trabalho apresentamos um estudo computacional de magnetismo em nano-escala. Modelamos as propriedades magneticas de nano-particulas usando um modelo de spins classicos na rede. Em nosso modelo consideramos interacoes de troca e dipolar. Enquanto o termo de troca age somente entre primeiros vizinhos o segundo e d…
Estudo da compatibilização de compósitos de polipropileno e farinha de madeira com polipropileno enxertado com ácido acrílico e anidrido maleico
A utilização de misturas poliméricas tem sido muito estudada e apresenta grande destaque por conta da obtenção de um material com propriedades modificadas a partir de outros pré-existentes. Os compósitos de matriz polimérica e carga de madeira ou outras fibras naturais constituem um grande atrativo por apresentar uma…