نتایج جستجو برای: antisolvent precipitation ultrasonication method

تعداد نتایج: 1680517  

R. Marandi S. R. Shirazinia Y. Bayat

Size reduction of high energy materials such as 1, 3, 5, 7-tetranitro- 1, 3, 5, 7-tetraaza cyclooctane (HMX) has considerable influences on improving their explosive characteristics. In this study, nanosized HMX par‌ticles were produced using ultrasonically reprecipitation method by applying water as a safe and accessible antisolvent instead of unsafe conventional methods. SEM photographs revea...

2015
Lin Li

Evaporative precipitation of nanosuspension (EPN) was used to prepare nanoparticles of poorly water soluble drugs, namely silymarin (SLM), hesperetin (HSP) and glibenclamide (GLB), with the aim of improving their rate of dissolution. The original drugs and EPN prepared drug nanoparticles were characterized by scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and dissol...

Journal: :Molecules 2018
Stefan Beisl Petra Loidolt Angela Miltner Michael Harasek Anton Friedl

Micro- and nanosize lignin has recently gained interest due to its improved properties compared to standard lignin available today. As the second most abundant biopolymer after cellulose, lignin is readily available but used for rather low-value applications. Applications for lignin in micro- to nanoscale however, ranging from improvement of mechanical properties of polymer nanocomposites, have...

2014
Yavuz Gokce Burcu Cengiz Nuray Yildiz Ayla Calimli Zeki Aktas

Chitosan nanoparticles have been prepared using an ionic gelation method. The effects of freezedrying, cryoprotectant (D-trehalose) utilisation and ultrasonication time on the mean particle size, size distribution and stability of nanoparticles were investigated. The size distribution results indicated that freeze-drying caused the particles to agglomerate. Addition of the cryoprotectant and ul...

Journal: :Chemical Engineering & Technology 2021

Abstract Microfluidic processes are of great interest for the production nanoparticles with reproducible properties. However, in real systems, it is difficult to completely exclude incidental larger particles, which can contaminate product or clog downstream process modules. A class microfluidic filters was devised eliminating particulate contamination multistage continuous‐flow processes. To a...

Journal: :Separations 2022

Apigenin (API) has many biological activities, but its poor solubility limits clinical application. In this research, API nanoparticles were prepared by the liquid antisolvent precipitation (LAP) technique, which effectively improved and bioavailability of API. Through design a single-factor test, effects type dosage surfactants, concentration, to solvent volume ratio, speed time stirring, temp...

2013
Yong-Qiang Kang Chen Zhao Ai-Zheng Chen Shi-Bin Wang Yuan-Gang Liu Wen-Guo Wu Xiao-Qian Su

Lysozyme (LSZ)-loaded poly-L-lactide (PLLA) porous microparticles (PMs) were successfully prepared by a compressed CO₂ antisolvent process in combination with a water-in-oil emulsion process using LSZ as a drug model and ammonium bicarbonate as a porogen. The effects of different drug loads (5.0%, 7.5% and 10.0%) on the surface morphology, particle size, porosity, tapped density and drug releas...

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