نتایج جستجو برای: روش ctab
تعداد نتایج: 370994 فیلتر نتایج به سال:
A quick, simple and improved DNA extraction method from polysaccharide rich leaves of Boswellia serrata Roxb. has been developed. Different methods involving use of CTAB and SDS with or without modification were used. A CTAB based extraction method which uses diatomite to remove polysaccharides, such as, gums and resin, proved to be the best. This method allowed recovery of good quality DNA in ...
استخراج dna از گونه های ماکرو جلبکی حاوی میزان بالای ترکیبات پلی ساکاریدی و فنولی جهت مطالعات ژنتیکی
استخراج dna خالص و کافی از ماکرو جلبک ها به علت دارا بودن رنج وسیعی از متابولیتهای ثانویه، نحوه اشتباه نمونهبرداری و خصوصیات مرفولوژی کی آن ها، معمولاً مشکل است. ازآنجاکه استخراج dna خالص جهت مطالعات مولکولی از اهمیت ویژهای برخوردار است این مطالعه باهدف استخراج آسان و ارزان dna ژنومی باکیفیت و کمیت بالا از نمونههای ماکرو جلبکی انجام شد. استخراج dna توسط روشهای فنول-کلروفرم، ctab و ctab تغی...
The tributylphenyltin (TBPT)-encapsulated resorcinol (R)-formaldehyde (F) sol was prepared inside the micelles of cetyltrimethylammonium bromide (CTAB). This core-shell-type sol was polymerized and further carbonized to obtain nanosized Sn-encapsulated spherical hollow carbon. The size of spherical hollow carbon and Sn metal particles was controllable by changing the R/CTAB or TBPT/CTAB mole ra...
استخراج DNA اولین مرحله در انجام آزمایشات ژنتیکی است، لذا کیفیت و کمیت مناسب DNA استخراج شده در مطالعات مولکولی امری بسیار ضروری می باشد. از این رو دستیابی به روش یا روش هایی که به سهولت استخراج DNA از زنبورعسل کوچک Apis florea Fabricius که یکی از دو گونه زنبورعسل موجود در ایران است کمک کند، می تواند حائز اهمیت باشد. این گونه زنبورعسل به دلیل پراکندگی گسترده و همچنین ایفای نقش مستقیم در گرده...
We provide a microscopic view of the role of halides in controlling the anisotropic growth of gold nanorods through a combined computational and experimental study. Atomistic molecular dynamics simulations unveil that Br(-) adsorption is not only responsible for surface passivation, but also acts as the driving force for CTAB micelle adsorption and stabilization on the gold surface in a facet-d...
Catanionic micelles as a model to mimic biological membranes in the presence of anesthetic alcohols.
We show here the influence of n-alcohols (C(2)OH-C(8)OH) on the solubility behavior of cationic-anionic surfactant mixtures, so-called "catanionics". We studied catanionics of different compositions composed of sodium dodecyl sulfate (SDS)/cetyltrimethylammonium bromide (CTAB) and sodium dodecanoate (SDod)/CTAB mixtures. Interestingly, with a molar excess of SDS, long chain n-alcohols (C(4)OH-C...
Adsorption and desorption of sulfamethoxazole (SMX) at water-sediment interfaces from Taihu Lake, China, were investigated in this study. The effects of a cationic surfactant, cetyltrimethylammonium bromide (CTAB), and an anionic surfactant, sodium dodecylbenzene sulfonate (SDBS), on the adsorption/desorption processes were also studied. Results show that adsorption and desorption could be well...
Btana is traditional preservation method that can sustain date’s supply during many years in comparaison to the commercial storage methods. However no scientific informations are available about biological factors that contribute to the successful of this method. Bacterial communities are a major key in preservation of many foods. Culture independent techniques are the most powerful tools to en...
Kinetic studies on the reduction of dithizone by stannous chloride was carried out in acidic medium (HCl) at room temperature. The study was made in the presence of cationic surfactant, Cetyl Trimethyl ammonium Bromide (CTAB) and anionic surfactant, Sodium Dodecyl Sulphate (SDS). The reduction of dithizone in the presence of CTAB is much faster than in the absence of surfactant in acidic medium...
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