نتایج جستجو برای: سورفکتانت ctab

تعداد نتایج: 2577  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهرکرد - دانشکده علوم پایه 1390

چکیده: پروتئین های کوچک اغلب به منظور ایجاد کمپلکس و مطالعه بر هم کنش با سورفکتانتها مورد استفاده قرار می گیرند. لیزوزیم آنزیمی کروی کوچک و فشرده با 129 اسید آمینه می باشد، که دارای 4 پیوند دی سولفید و 6 اسید آمینه تریپتوفان است ا ز این رو برای مطالعات طیف سنجی و طیف سنجی فلورسانس مناسب میباشد. در این تحقیق دگرگون سازی لیزوزیم توسط ترکیبات مختلف شامل سدیم دودسیل سولفات، سدیم اکتیل سولفات، ستی...

Journal: :Journal of oleo science 2008
Toshio Sakai Hanae Yano Mitsuru Ohno Hirobumi Shibata Kanjiro Torigoe Shigenori Utsumi Kazutami Sakamoto Naokiyo Koshikawa Satoshi Adachi Hideki Sakai Masahiko Abe

Hexagonal-structured self-assemblies of nanocrystalline (anatase) titania templated by cetyltrimethylammonium bromide (C(16)H(33)N(CH(3))(3)Br; CTAB) (Hex-ncTiO(2)/CTAB Nanoskeleton) were formed after mixing of aqueous solutions containing CTAB spherical micelles and titanium oxysulfate acid hydrate (TiOSO(4).xH(2)SO(4).xH(2)O) as a titania precursor in the absence of any other additives. Forma...

Journal: :Sakarya University Journal of Science 2021

The aim of this study to determine the usability CTAB-RGO composites in removal MB from aqueous solutions and investigate stability dispersions. And also, we compared effects three different CTAB concentrations on decolorization MB. performed increasing activity, decreasing average particle size resulting individual graphene layers with concentration. CTAB-RG0 40 80 mg/L were unstable, RGO 120 ...

Journal: :Physical chemistry chemical physics : PCCP 2015
Blake J Plowman Kristina Tschulik Neil P Young Richard G Compton

Capping agents, key for nanoparticle stability, may hugely influence chemical behaviour. We show that differently capped gold nanoparticles, with either citrate or cetyl trimethylammonium bromide (CTAB) capping agents, show qualitatively different electron transfer properties. Specifically through cyclic voltammetry and nanoimpact studies the CTAB promoted dissolution of gold nanoparticles is s...

Journal: :European journal of biochemistry 1987
K Vos C Laane S R Weijers A Van Hoek C Veeger A J Visser

Interactions between fluorescent horse heart cytochrome c derivatives (e. g. porphyrin cytochrome c and Zn-porphyrin cytochrome c) with surfactant interfaces in reversed micellar solutions have been studied, using different spectroscopic techniques. Anionic [sodium bis(2-ethylhexyl)sulfosuccinate, AOT] and cationic (cetyltrime-thylammonium bromide, CTAB) surfactant solutions have been used in o...

2014
Xinwei Cheng Xiaohua Chen Xiaoquan Su Huanxin Zhao Maozhen Han Cunpei Bo Jian Xu Hong Bai Kang Ning

Traditional Chinese medicine (TCM) preparations are widely used for healthcare and clinical practice. So far, the methods commonly used for quality evaluation of TCM preparations mainly focused on chemical ingredients. The biological ingredient analysis of TCM preparations is also important because TCM preparations usually contain both plant and animal ingredients, which often include some mis-...

Journal: :Indian journal of experimental biology 2001
P C Bindu P Babu

Exposure to anionic (sodium dodecyl sulfate, SDS), cationic (cetyl trimethyl ammonium bromide CTAB) and non ionic (Triton X-100) surfactants at a sub lethal concentration of 1 ppm resulted in severe oxidative stress in the hepatic, renal and cardiac tissues of fresh water adapted Oreochromis mossambicus. Hepatic catalase showed significant increase (P<0.001) in all the surfactant exposed fish, ...

Journal: :Molecular pharmacology 2009
Emma Ito Kenneth W Yip David Katz Sonali B Fonseca David W Hedley Sue Chow G Wei Xu Tabitha E Wood Carlo Bastianutto Aaron D Schimmer Shana O Kelley Fei-Fei Liu

A potential therapeutic agent for human head and neck cancer (HNC), cetrimonium bromide (CTAB), was identified through a cell-based phenotype-driven high-throughput screen (HTS) of 2000 biologically active or clinically used compounds, followed by in vitro and in vivo characterization of its antitumor efficacy. The preliminary and secondary screens were performed on FaDu (hypopharyngeal squamou...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2010
Hongmin Chen Tao Hu Xinmeng Zhang Kaifu Huo Paul K Chu Junhui He

Monodisperse, uniform, and hierarchically mesostructured silica particles with a thin shell have been fabricated via one-step synthesis using dodecanethiol (C(12)-SH) and CTAB as dual templates. A series of hierarchically mesostructured silica particles with a morphology similar to that of pomegranate can be obtained by simply adjusting the mass ratio of C(12)-SH to CTAB. When the mass ratio is...

Journal: :Nanoscale 2018
J H Hu H Mi N Wang H Y Zhu W Y Guo S R Zhang F Shi Z B Lei Z-H Liu R B Jiang

The catalytic activity of metal nanocrystals is mainly tuned through the control of their shapes and sizes. However, the shapes and sizes of many metal nanocrystals are difficult to control and therefore their catalytic activity is hard to tune. Here, we demonstrate another approach, using differently charged surfactants, for tuning the catalytic activity of metal nanocrystals. Au and Pd nanocr...

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