نتایج جستجو برای: naa
تعداد نتایج: 3621 فیلتر نتایج به سال:
This study is the first realisation of true optical rugate filters (RFs) based on nanoporous anodic alumina (NAA) by sinusoidal waves. An innovative and rationally designed sinusoidal pulse anodisation (SPA) approach in galvanostatic mode is used with the aim of engineering the effective medium of NAA in a sinusoidal fashion. A precise control over the different anodisation parameters (i.e. ano...
In this study, articles in English and Chinese were selected from available electronic databases prior to September 2014. The metabolic concentrations and patterns of N-acetylaspartic acid (NAA), Choline (Cho), Creatine (Cr), NAA/Cr, NAA/Cho, and Cho/Cr ratios in radiotherapy-induced radiation encephalopathy by proton magnetic resonance spectroscopy were extracted. A meta-analysis was performed...
BACKGROUND Aloe vera L. is an important pharmaceutical plant from which several medicinal and cosmetic compounds are extracted. Aloe is naturally propagated through offset, which is a slow and expensive labor cost method with low economical income. OBJECTIVES In this study, the effect of different media on shoot proliferation of the shoot tip of Aloe vera L. was investigated. MATERIALS AND ...
کاملیای زینتی درختچهای کُند رشد و همیشه سبز است که به خاطر گلهای زیبای آن پرورش داده میشود. این گیاه برای کاشت در فضای سبز وگل بریدنی مورد استفاده قرار میگیرد. راحتترین و ارزانترین روش تکثیر این گیاه از طریق قلمه است ولی قلمههای این گیاه به راحتی ریشهدار نشده و نیاز به تیمارهای خاصی از جمله استفاده از اکسین دارند. بدین منظور این آزمایش در قالب فاکتوریل بر پایه طرح بلوکهای کامل تصادف...
Reduction of regional brain glucose metabolism (rBGM) measured by [18F]FDG-PET in the posterior cingulate cortex (PCC) has been associated with a higher conversion rate from mild cognitive impairment (MCI) to Alzheimer's disease (AD). Magnetic Resonance Spectroscopy (MRS) is a potential biomarker that has disclosed Naa/mI reductions within the PCC in both MCI and AD. Studies investigating the r...
PURPOSE Children who have brain tumors are at risk for a variety of treatment-related sequelae, including neuropsychological and cognitive impairment, neurologic deficits, and neuroendocrinologic disturbances. We sought to determine the value of proton MR spectroscopy in assessing brain tissue remote from the tumor site to ascertain the effects of chemotherapy and radiation treatment in these p...
Herein, we present a systematic study on the development, optimisation and applicability of interferometrically coloured distributed Bragg reflectors based on nanoporous anodic alumina (NAA-DBRs) in the form of films and nanoporous microparticles as visual/colorimetric analytical tools. Firstly, we synthesise a complete palette of NAA-DBRs by galvanostatic pulse anodisation approach, in which t...
We present herein the use of nanoporous anodic alumina (NAA) as a suitable support to implement "molecular gates" for sensing applications. In our design, a NAA support is loaded with a fluorescent reporter (rhodamine B) and functionalized with a short single-stranded DNA. Then pores are blocked by the subsequent hybridisation of a specific cocaine aptamer. The response of the gated material wa...
A simple micropropagation protocol has been achieved using nodal region and apical leaf of Clerodendrum indicum,(L) kuntze; an important medicinal plant of Verbenaceae. The explants were cultured in MS medium supplemented with NAA, BA, 2,4-D,Kn, IBA in various combination and concentrations (0.110.0 μM). Response to callogenesis were diverse, ranging from white vigorous compact callus (1.0μM NA...
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