نتایج جستجو برای: concentration gradient method

تعداد نتایج: 2036316  

Journal: :journal of nanostructures 0
ali hashemizadeh department of physics, payame noor university, tehran, iran vahid mohammadi siavashi department of physics, payame noor university, tehran, iran

in present work, we have calculated the electronic properties including density of states (dos) and electron density for gan, inn and in wurtzite phase for x=0.5. the study is based on density functional theory (dft) with full potential linearized augmented plane wave method (fp-lapw) by generalized gradient approximation (gga-pbesol) for calculating electronic properties. in this report we con...

Journal: :international journal of infection 0
maryam shojaee department of biology, payame noor university of mashhad, mashhad, ir iran saeid zibaei razi vaccine and serum research institute, agricultural research, education and extension organization (areeo) mashhad, ir iran; razi vaccine and serum research institute, agricultural research, education and extension organization (areeo) mashhad, ir iran. tel: +98-5138431780

results the pellet of the 146s antigen of fmd virus serotype a was developed at a concentration of sucrose 50%. absorbance rate of the foot-and-mouth disease virus serotypes a at wavelengths of 240, 259 and 280 nm was 1.238, 1.573 and 1.157, respectively. moreover, the amount of 146s antigen at the same wavelengths was 163.416, 207.636 and 152.724 μg/ml, respectively. the amount of purified pro...

2006
Yi Wang Tamal Mukherjee Qiao Lin

This paper presents a systematic modeling methodology for microfluidic concentration gradient generators. The generator is decomposed into a system of microfluidic elements with relatively simple geometries. Parameterized models for such elements are analytically developed and hold for general sample concentration profiles and arbitrary flow ratios at the element inlet; hence, they are valid fo...

Journal: :The Journal of General Physiology 2003
Annie May Hurd-Karrer

In a recent paper, Evelyn I. Fernald 1 has shown that the osmotic concentration of the sap of different portions of stems is correlated with the tendency of buds to develop on those portions. She has found by freezing point measurements on the expressed sap that in actively growing stems of privet, chestnut, Pkiladelphus, and Bryophyllum there is a concentration gradient, the highest concentrat...

2015
Takahiro Kozawa Makio Naito

Core@shell and concentration-gradient particles have attracted much attention as improved cathodes for Li-ion batteries (LIBs). However, most of their preparation routes have employed a precisely-controlled co-precipitation method. Here, we report a facile preparation route of core@shell and concentration-gradient spinel particles by dry powder processing. The core@shell particles composed of t...

Journal: :Lab on a chip 2007
Joong Yull Park Chang Mo Hwang Soon Hyuck Lee Sang-Hoon Lee

This paper describes a method to generate a concentration gradient using an osmosis-driven pump, without the need for bulky peripheral devices, such as an electric syringe pump or a pneumatic pump. By the osmosis, the flow in the microfluidic channel can be controlled even to a very slow speed (nanolitre scale), which enables its application to generate the stable and wide (width = 4 mm) concen...

Journal: :Journal of biomedical materials research. Part A 2004
Terri Adams Kapur Molly S Shoichet

Axons are guided to their targets by a combination of haptotactic and chemotactic cues. We previously demonstrated that soluble neurotrophic factor concentration gradients guide axons in a model system. In an attempt to translate this model system to a device for implantation, our goal was to immobilize a stable neurotrophic concentration gradient for axonal (or neurite) guidance. Nerve growth ...

Journal: :avicenna journal of medical biochemistry 0
rohollah setarehbadi student research committee, hamadan university of medical sciences, hamadan, iran mojgan atabakhash student research committee, hamadan university of medical sciences, hamadan, iran amir fattahi student research committee, hamadan university of medical sciences, hamadan, iran aboozar mohagheghi student research committee, hamadan university of medical sciences, hamadan, iran asad vaisi-raygani fertility and infertility center, kermanshah university of medical sciences, kermanshah, iran hossain mahjub department of epidemiology and biostatistics, faculty of public health, hamadan university of medical science, hamadan, iran

objectives lipid components of spermatozoa have an important role in its functional activity. in this study the concentration of cholesterol, phospholipid, triacylglycerol and total lipid in different subsets of human spermatozoa, isolated as three fractions by a discontinuous puresperm gradient, was determined. methods aliquots of the liquefied semen samples (n=107) were layered on top of the ...

Journal: :The Leading Edge 2018

2016
Fanyi Zhu Mark A. Hayes Timothy Strein

Over the last two decades, miniaturization, integration, and automation have made microfluidic systems popular. Core to advances in microfluidics are numerous electrophoretic separation and preconcentration strategies, some finding their origins on bench-top systems. Among them, gradient-based strategies are especially effective in addressing sensitivity challenges. This review introduces sever...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید