نتایج جستجو برای: nano tio2 and yeast extract

تعداد نتایج: 16887026  

Journal: :علوم باغبانی ایران 0
مهدیه خدایاری دانشجوی سابق دکتری مهندسی ژنتیک و ژنتیک مولکولی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران منصور امیدی استاد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران علی اکبر شاه نجات بوشهری دانشیار ، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران داراب یزدانی استادیار گروه فارماکوگنوزی و داروسازی، مرکز تحقیقات گیاهان دارویی، پژوهشکدة گیاهان دارویی جهاد دانشگاهی، ایران محمدرضا نقوی استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران زهره کدخدا کارشناس گروه فارماکوگنوزی و داروسازی، مرکز تحقیقات گیاهان دارویی، پژوهشکدة گیاهان دارویی جهاد دانشگاهی، ایران

to develop an optimal bioprocess for benzophenanthridin alkaloids production, various metabolite engineering are studied to increase yields, in which one of them is elicitation. elicitors are biotic or abiotic molecules that have effectively stimulated the production of plant secondary metabolites in cell and organ cultures. since this plant serves as the only commercial source of morphine and ...

2013
Yulin Tang Shuyan Li Junlian Qiao Hongtao Wang Lei Li

Anabaena sp. was used to examine the toxicity of exposure to a nano-TiO2 suspension, Zn2+ solution, and mixtures of nano-TiO2 and Zn2+ suspensions. Typical chlorophyll fluorescence parameters, including effective quantum yield, photosynthetic efficiency and maximal electron transport rate, were measured by a pulse-amplitude modulated fluorometer. Nano-TiO2 particles exhibited no significant tox...

Journal: :Pakistan journal of pharmaceutical sciences 2015
Ronghe Zhang Weiwei Zhang Xueyan Bai Xiaotong Song Chunyan Wang Xinxin Gao Xubiao Tian Fengzhen Liu

This paper aims to explore the antibacterial property of nano Ag/TiO2 coating bracket for the common bacteria in oral cavity, and discuss its biocompatibility. Micro morphology in the surface of nano Ag/TiO2 coating bracket was detected by scanning electron microscope (SEM), and surface roughness of ordinary mental bracket, nano TiO2 coating bracket and nano Ag/TiO2 coating bracket were measure...

Journal: :Chemosphere 2014
Shibin Li Xuan Pan Lindsay K Wallis Zhaoyang Fan ZuLiang Chen Stephen A Diamond

With a dramatic rise in complexity, needs of nanotoxicology research go beyond simple forms of nanomaterials. This study compared the phototoxicity of nano-TiO2 and graphene-TiO2 nanocomposite (GNP). GNP was synthesized based on a hydrothermal method, which simultaneously performed the reduction of graphene oxide and nano-TiO2 loading. A series of acute toxicity tests of nano-TiO2, graphene and...

2017
Xiaochuan Jia Shuo Wang Lei Zhou Li Sun

Nanoscale titanium dioxide (nano-TiO2) has been widely used in industry and medicine. However, the safety of nano-TiO2 exposure remains unclear. In this study, we evaluated the liver, brain, and embryo toxicity and the underlying mechanism of nano-TiO2 using mice models. The results showed that titanium was distributed to and accumulated in the heart, brain, spleen, lung, and kidney of mice aft...

Journal: :Molecules 2016
Ming Chu Yue-Long Hou Lan Xu Zheng-Yun Chu Ming-Bo Zhang Yue-Dan Wang

Nano-TiO2 is widely applied in the automobile exhaust hose reels as a catalyst to reduce oxynitride emissions, including nitric oxide (NO). In the biomedicine field, NO plays an important role in vasodilation and edema formation in human bodies. However, the deswelling activity of nano-TiO2 has not been reported. Here, we demonstrated that nano-TiO2 can significantly degrade the production of N...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1391

in this project, 4,4?-methylenebis(3-chloro-2,6-diethyl trimellitimidobenzene) as a diacid, was prepared by the reaction of trimellitic anhydride (tma) with 4,4?-methylenebis(3-chloro-2,6-diethylaniline) (mcdea). the novel poly(amide-imide) (pai) was synthesized from the reaction of 4,4?-methylenebis(3-chloro-2,6-diethyl trimellitimidobenzene) as a diacid with mcdea under green condition using ...

Journal: :journal of nanostructures 2012
b. shareghi m. salavati-niasari s. farhadian r. amooaghaei

in the present study, the interaction between nano-tio2 and lysozyme was investigated by the method of uv-vis detection and fluorescence spectroscopic techniques. the thermal denaturation of lysozyme has been investigated in the presence and absence of nano-tio2 over the temperature range (293-373) k in different buffer and ph, using temperature scanning spectroscopy. the presence of nano-tio2 ...

Journal: :Journal of applied toxicology : JAT 2014
Baoyong Sha Wei Gao Shuqi Wang Xingchun Gou Wei Li Xuan Liang Zhiguo Qu Feng Xu Tian Jian Lu

Extensive studies have shown that titanium dioxide (TiO2 ) nanomaterials (NMs) can cause toxicity in vitro and in vivo under normal conditions. However, an adverse effect induced by nano-TiO2 in many diseased conditions, typically characterized by oxidative stress (OS), remains unknown. We investigated the toxicity of nano-TiO2 in rat liver cells (BRL-3A) and Sprague-Dawley (SD) rat livers unde...

2015
Chu Thi Thanh Binh Christopher G. Peterson Tiezheng Tong Kimberly A. Gray Jean-François Gaillard John J. Kelly

Production of titanium-dioxide nanomaterials (nano-TiO2) is increasing, leading to potential risks associated with unintended release of these materials into aquatic ecosystems. We investigated the acute effects of nano-TiO2 on metabolic activity and viability of algae and cyanobacteria using high-throughput screening. The responses of three diatoms (Surirella angusta, Cocconeis placentula, Ach...

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