نتایج جستجو برای: alginate microsphere

تعداد نتایج: 11728  

2015
Peifen Zhu Nelson Tansu

The finite-difference time-domain method was employed to calculate light extraction efficiency of thin-film flip-chip InGaN/GaN quantum well light-emitting diodes (LEDs) with TiO2 microsphere arrays. The extraction efficiency for LEDs with microsphere arrays was investigated by focusing on the effect of the packing density, packing configuration, and diameter-to-period ratio. The comparison stu...

Journal: :Advanced quantum technologies 2021

Owing to their ability generate non-classical light states, quantum dots (QDs) are very promising candidates for the large-scale implementation of information technologies. However, high photon collection efficiency demanded by these technologies may be impossible reach “standalone” semiconductor QDs, embedded in a high-refractive index medium. In this work novel laser writing technique is pres...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2016
Alexander S Pasciak Austin C Bourgeois Yong C Bradley

UNLABELLED Differences in maximum tolerable absorbed dose to normal liver between (90)Y radioembolization and external-beam radiation therapy have been explained by citing differences in absorbed-dose heterogeneity at the microscopic level. We investigated microscopic absorbed-dose heterogeneity in radioembolization as a function of the number of microspheres per unit volume in tumor. The goal ...

Journal: :Journal of diabetes science and technology 2012
Yan Wang Santhisagar Vaddiraju Liangliang Qiang Xiaoming Xu Fotios Papadimitrakopoulos Diane J Burgess

BACKGROUND Hydrogels alone and in combination with microsphere drug delivery systems are being considered as biocompatible coatings for implantable glucose biosensors to prevent/minimize the foreign body response. Previously, our group has demonstrated that continuous release of dexamethasone from poly(lactic-co-glycolic acid) (PLGA) microsphere/poly(vinyl alcohol) (PVA) hydrogel composites can...

2016
Mengxue Wu Rui Chen Jiahao Soh Yue Shen Lishi Jiao Jianfeng Wu Xudong Chen Rong Ji Minghui Hong

Engineered microsphere possesses the advantage of strong light manipulation at sub-wavelength scale and emerges as a promising candidate to shrink the focal spot size. Here we demonstrated a center-covered engineered microsphere which can adjust the transverse component of the incident beam and achieve a sharp photonic nanojet. Modification of the beam width and working distance of the photonic...

2014
Jacinta R. Wiens Adriana I. Vasil Michael J. Schurr Michael L. Vasil

UNLABELLED Pseudomonas aeruginosa strains of non-cystic fibrosis (non-CF) origin do not produce significant amounts of extracellular alginate and are nonmucoid. In CF, such isolates can become mucoid through mutation of one of the genes (mucA, mucB, mucC, or mucD) that produce regulatory factors that sequester AlgU, required for increased expression of alginate genes. Mutation of the muc genes ...

Journal: :American journal of physiology. Gastrointestinal and liver physiology 2015
P Woodland F Batista-Lima C Lee S L Preston P Dettmar D Sifrim

Patients with nonerosive reflux disease exhibit impaired esophageal mucosal integrity, which may underlie enhanced reflux perception. In vitro topical application of an alginate solution can protect mucosal biopsies against acid-induced changes in transepithelial electrical resistance (TER). We aimed to confirm this finding in a second model using 3D cell cultures and to assess prolonged protec...

Journal: :International Journal of Nanomedicine 2006
V Manojlovic J Djonlagic B Obradovic V Nedovic B Bugarski

The process of electrostatic extrusion as a method for cell immobilization was investigated that could be used for potential applications in medicine. An attempt was made to assess the effects of cell addition and polymer concentration on the overall entrapment procedure, ie, on each stage of immobilization: polymer-cell suspension rheological characteristics, electrostatic extrusion process, a...

2010
A. B. Jindal M. N. Wasnik Hema A. Nair

Modification of polymers by covalent attachment of thiol bearing pendant groups is reported to impart many beneficial properties to them. Hence in the present study, sodium alginate-cysteine conjugate was synthesized by carbodiimide mediated coupling under varying reaction conditions and the derivatives characterized for thiol content. The thiolated alginate species synthesized had bound thiol ...

2014
Alvaro Díaz-Barrera Fabiola Martínez Felipe Guevara Pezoa Fernando Acevedo

Alginates are polysaccharides used as food additives and encapsulation agents in biotechnology, and their functional properties depend on its molecular weight. In this study, different steady-states in continuous cultures of A. vinelandii were established to determine the effect of the dilution rate (D) and the agitation rate on alginate production and expression of genes involved in alginate p...

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