نتایج جستجو برای: porous zno nanoparticles stability reusability

تعداد نتایج: 466037  

2014
Yan Wang Haixin Cui Changjiao Sun Xiang Zhao Bo Cui

Photolysis and poor solubility in water of Abamectin are key issues to be addressed, which causes low bioavailability and residual pollution. In this study, a novel hydrophilic delivery system through loading Abamectin with porous silica nanoparticles (Abam-PSNs) was developed in order to improve the chemical stability, dispersity, and the controlled release of Abamectin. These results suggest ...

2013
Sio-Le Lin Kai-Chih Hsu Chih-Hsiung Hsu Dong-Hwang Chen

ZnO nanorod arrays were synthesized by chemical bath deposition. After heat treatment in hydrogen or air, Ag nanoparticles were deposited on ZnO nanorod arrays by photo-reduction method. The size of Ag nanoparticles as well as the surface morphology, structure, composition, and optical property of ZnO nanorod arrays before and after the deposition of Ag nanoparticles were characterized by SEM, ...

Journal: :زیست شناسی جانوری تجربی 0
محبوبه میر حسینی مقایسة اثر ضد میکروبی نانوذره zno در آبمیوه سیب در دمای 25 و 4 درجه سلسیوس مولود کیانی هرچگانی مقایسة اثر ضد میکروبی نانوذره zno در آبمیوه سیب در دمای 25 و 4 درجه سلسیوس شیرین مامایی دهکردی مقایسة اثر ضد میکروبی نانوذره zno در آبمیوه سیب در دمای 25 و 4 درجه سلسیوس فاطمه برزگری فیروز آبادی مقایسة اثر ضد میکروبی نانوذره zno در آبمیوه سیب در دمای 25 و 4 درجه سلسیوس

abstract nanoparticles (nps) are increasingly recognized as their usage in biological applications including nanomedicine and food safety. purpose of this study was study on comparison of antibacterial effect of zno nanoparticles in apple juice at 25 and 4 ° c. the present study investigated the antibacterial activity of zno was tested against listeria monocytogenes, escherichia coli, staphyloc...

2017
Chenhui Wang Haobo Han Wei Jiang Xiaobo Ding Quanshun Li Yanbo Wang David D. Boehr

Here, core-shell structured polydopamine-coated Fe3O4 nanoparticles were constructed to immobilize thermostable lipase QLM from Alcaligenes sp. Systematical characterization indicated that lipase QLM was successfully immobilized on the surface of nanoparticles with an enzyme loading of 21.4 ± 1.47 mg/g immobilized enzyme. Then, the immobilized enzyme was demonstrated to possess favorable cataly...

2018
Hajer Rokbani France Daigle Abdellah Ajji

This study investigates the antibacterial activity (ABA) of suspensions of pure ZnO nanoparticles (ZnO-NPs) and mesoporous silica doped with ZnO (ZnO-UVM7), as well as electrospun nanofibers containing those nanoparticles. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of these two materials were also determined under the same conditions. The results sho...

2016

Nano is an advanced technology which in recent years has had numerous applications in different fields such as industry, biotechnology, energy, environment and etc. In this paper, ZnO nanoparticles were synthesized by simple method of precipitation sounds more plausible. ZnSO4 and NH4OH were used as precursors to yield ZnO powders. The synthesized ZnO nanoparticles were characterized by X-ray d...

2014
Jinzhang Liu Marco Notarianni Llew Rintoul Nunzio Motta

One-dimensional single crystal incorporating functional nanoparticles of other materials could be an interesting platform for various applications. We studied the encapsulation of nanoparticles into single-crystal ZnO nanorods by exploiting the crystal growth of ZnO in aqueous solution. Two types of nanodiamonds with mean diameters of 10 nm and 40 nm, respectively, and polymer nanobeads with si...

Journal: :journal of nanostructures 2015
h. khojasteh v. mirkhani m. moghadam s. tangestaninejad i. mohammadpoor-baltork

palladium is the best metal catalyst for suzuki cross coupling reaction for synthesize of unsymmetrical biaryl compounds. but its high cost limits its application in wide scale. using of nanoscale particles as active catalytic cites is a good approach for reducing needed noble metal. by loading precious nanoparticles on magnetic nanocores as a support, recycling and reusing of catalyst will be ...

2016
Gunjan Bisht Sagar Rayamajhi Biplab KC Siddhi Nath Paudel Deepak Karna Bhupal G. Shrestha

Novel magnetic composite nanoparticles (MCPs) were successfully synthesized by ex situ conjugation of synthesized ZnO nanoparticles (ZnO NPs) and Fe3O4 NPs using trisodium citrate as linker with an aim to retain key properties of both NPs viz. inherent selectivity towards cancerous cell and superparamagnetic nature, respectively, on a single system. Successful characterization of synthesized na...

L. Taghavi N. Jaafarzadeh, P. Farshchi R. Khoshnood Sh. Jamili

The brine shrimp, Artemia spp., is widely used in ecotoxicological research as a biological index. In the present study, aquatic stability and acute toxic effects of TiO2, CuO and ZnO nanoparticles (NPs) on Artemia franciscana were investigated. Acute exposure was conducted in sea water with different concentrations of selected nanoparticles at 24h, 48h, 72h and 96h. The mortality rate of A. fr...

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