نتایج جستجو برای: au seed
تعداد نتایج: 154798 فیلتر نتایج به سال:
نانو ذرات، به خصوص نانو ذرات فلزی، خواص شگرفی از خود نشان می دهند که با خواصشان در حالت حجمی متفاوت هستند. این خواص به علت ساختار و سطح نانو مقیاس آنها ظاهر می شوند. یکی از روش های ساخت نانو ذرات فلزی ، حل کردن نمک فلزات در حلال های مختلف و سپس احیای آنها توسط عوامل احیاگر است. در این تحقیق نانو ذرات طلا از طریق احیای اسید کلروآئورات (haucl4) توسط تری سدیم سیترات ساخته شدند. همچنین به منظور جمع...
This paper presents an ultrasensitive fluorescent detection method through fabricating a silver microarray substrate. Silver nanoparticles (AgNPs) and Ag@Au core-shell nanoparticles with different sizes were first synthesized by a seed-mediated growth method and the metal-enhanced fluorescence of these nanoparticles on different fluorescent dyes was investigated. The results indicated that AgNP...
the conducting polymer films have been widely applied in the field of electrochemistry owing to their goodstability, permselectivity, unique physical and chemical properties. a novel nano-au/poly (4-aminobenzoicacid) (paba) film modified carbon paste electrode was fabricated for sensitive detection of acetaminophenin this paper. the paba film and nano-au/paba film were characterized by scanning...
Field studies were conducted in 2003 and 2004 to investigate the reaction of 10 varieties of kenaf to natural infestation of Meloidogyne incognita. Ten weeks after planting, ten randomly selected plants per variety were assessed for root galling. Plants were carefully uprooted soil adhering to roots was washed off under a gentle stream of tap water and roots then were observed using a stereo mi...
Because of the advanced work mechanism on enzyme direct electron transfer, third-generation biosensor has aroused the growing attentions in recent decade. Herein, a novel structured 3rd generation glucose biosensor was constructed by the in-situ limited electrodeposition of gold nanocubes on a thiol graphene film. On account of the restriction from –SH group, initially, a tightly distributed Au...
0167-8191/$ see front matter 2013 The Authors. Published by Elsevier B.V. All rights reserved. http://dx.doi.org/10.1016/j.parco.2013.09.001 q This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, dist and reproduction in any medium, provided the original author and source are credited. ⇑ Corresponding author. Tel...
BACKGROUND Skull-stripping is the procedure of removing non-brain tissue from anatomical MRI data. This procedure can be useful for calculating brain volume and for improving the quality of other image processing steps. Developing new skull-stripping algorithms and evaluating their performance requires gold standard data from a variety of different scanners and acquisition methods. We complemen...
Localized surface plasmon resonance (LSPR) properties of metallic nanostructures, such as gold, are very sensitive to the dielectric environment of the material, which can simply be adjusted by changing its shape and size through modification of the synthesizing process. Thus, these unique properties are very promising, particularly for the detection of various types of chemicals, for example b...
Changes in the functional connectivity (FC) of large-scale brain networks are a prominent feature of brain aging, but defining their relationship to variability along the continuum of normal and pathological cognitive outcomes has proved challenging. Here we took advantage of a well-characterized rat model that displays substantial individual differences in hippocampal memory during aging, unco...
The activities of RNA-binding proteins are perturbed in several pathological conditions, including cancer. These proteins include tristetraprolin (TTP, ZFP36) and HuR (ELAVL1), which respectively promote the decay or stability of adenylate-uridylate-rich (AU-rich) mRNAs. Here, we demonstrated that increased stabilization and subsequent over-expression of HuR mRNA were coupled to TTP deficiency....
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