scholarly journals COMPARISION OF CURCUMIN NANOEMULSION DROPS SIZE BETWEEN HOMINIZATION AND ULTRASONICATION SUPPORTING

2020 ◽  
Vol 39 (03) ◽  
Author(s):  
HO THI THANH THUY ◽  
PHAM THI KIM NGOC ◽  
NGUYEN THI THANH TU ◽  
HUYNH THI THANH TRUC ◽  
NGUYEN VAN HAI ◽  
...  
Keyword(s):  
Cold Storage ◽  
Ultrasonic Method ◽  
Ultrasonic Power ◽  
Optimal Conditions ◽  
Emulsion System ◽  
Nano Emulsion ◽  
Average Size ◽  
Emulsifier Concentration

In this paper, curcumin nano-emulsions were successfully prepared by combining hominization and ultra-sonication methods which have been mentioned. The optimal conditions for the hominization method have been established as follows: 3% emulsifier concentration, 20,000 rpm of capacity in 60 minutes, the average size of nano drops was 78 nm. Meanwhile, the optimal conditions of the ultrasonic method are also constructed as follows: 2% emulsifier concentration, 450 w/g of ultrasonic power, 20 kHz frequency, the average size of the droplet was 58 nm. Nano-emulsion system has been stable after 4 months of cold storage.

Stability of the PEG Fatty Acid Glycerides Based O/W Emulsions

2021 ◽  
Vol 58 (4) ◽  
pp. 271-277
Author(s):  
Zihan Wang ◽  
Liangliang Lin ◽  
Hujun Xu
Keyword(s):  
Droplet Size ◽  
Lauric Acid ◽  
Volume Ratio ◽  
Water Volume ◽  
Optimal Conditions ◽  
Rotational Rheometer ◽  
Emulsion Systems ◽  
Oil Water ◽  
The Stability ◽  
Emulsifier Concentration

Abstract In the present work, oil-in-water (O/W) emulsion systems were prepared by using the PEG-7 lauric acid glycerides as the emulsifiers and the liquid paraffin as the oil phase. The influence of processing parameters such as emulsification temperature, stirring speed, emulsifier concentration, oil-water volume ratio and polymer addition on the stability of the emulsion systems was investigated. In order to determine the optimal conditions for the preparation of the emulsion systems based on PEG-7 lauric acid glycerides, a laser drop size analyser and a rotational rheometer were used. As the stability of the O/W emulsion systems increased, the average droplet size of the O/W emulsions measured by the laser droplet size analyser became smaller and the viscosity, storage modulus and loss modulus of the O/W emulsions measured by the rotational rheometer became larger. The following optimal conditions were determined in this study: emulsification temperature 80°C, stirring speed 500 r/min, emulsifier concentration 5 wt%, oil-water volume ratio 1:1 and added amount of xanthan gum 0.2 wt%. The droplet morphology of the O/W emulsion prepared under the optimal conditions, which was characterised by a super high magnification microscope, is small. Furthermore, the long-term stability of the emulsion system prepared under the optimal conditions was investigated over a period of time (4 weeks). The O/W emulsion proves to be well stable even after 4 weeks, with a water separation rate of 0%.

scholarly journals Reduced-Pressure Boiling Extraction of Oleuropein Coupled with Ultrasonication from Olive Leaves (Olea europaeaL.)

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Pu-jun Xie ◽  
Li-xin Huang ◽  
Cai-hong Zhang ◽  
Feng You ◽  
Cheng-zhang Wang ◽  
...  
Keyword(s):  
Ethanol Concentration ◽  
Extraction Yield ◽  
Optimal Operation ◽  
Ultrasonic Power ◽  
Extraction Temperature ◽  
Optimal Conditions ◽  
Olive Leaves ◽  
Sem Images ◽  
Reduced Pressure ◽  
Operation Conditions

Oleuropein was extracted fromFrantoioolive leaves using reduced-pressure boiling extraction coupled with ultrasound-assist (URPE). Four important factors, extraction temperature, ultrasonic power, ethanol concentration, and the ratio of solid to liquid, were selected to carry out the response surface methodology (RSM) for seeking optimal conditions on high oleuropein extraction yield at different levels. Box-Behnken design was employed to investigate the effects of the four factors on it. The results showed that the ratio of solid to liquid was the most significant factor of all on oleuropein yield. The optimal operation conditions were obtained as follows: ethanol concentration 75% (v/v), extraction temperature 53°C, ultrasonic power 600 W, and the ratio of solid to liquid 1 : 31. Under these optimal conditions, oleuropein extraction yield was 7.08%, which was close to the predicted value 7.121%. The scanning electron microscope (SEM) images of olive leaves after extraction were provided as well. It was seen that, compared with the untreated leaves, URPE could effectively break cells within the olive leaves.

Synthesis and Luminescent Properties of Y2O3:Eu3+ Nanocrystal by the Ultrasonic Method

2011 ◽  
Vol 399-401 ◽  
pp. 921-925
Author(s):  
Hong Quan Yu ◽  
Hong Dan Wang ◽  
Tao Li ◽  
Bao Jiu Chen
Keyword(s):  
Ultrasonic Method ◽  
Luminescent Properties ◽  
Close Relation ◽  
Research Progress ◽  
Good Prospect ◽  
Ultrasonic Power ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray ◽  
Annealing Conditions

Rare-earth luminescence materials in lighting the tube and the field emission fields has been widely applied.In the leds, special security lights and energy-saving lighting are in the areas of infinite good prospect, this paper the research progress of preparation and a concrete discussion . The ultrasonic method for Y2O3:Eu3+ nanocrystal, annealing conditions on the Y2O3:Eu3+ nanocrystal particles size, crystal condition and the influence of the luminescence properties.The properties of the Y2O3:Eu3+ complexes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Reaction conditions, such as ultrasonic power and the temperature were found to have close relation with the morphologies of final products.

Optimization of Pectin Extraction from Sweet Potato Peels Using Citric Acid and its Emulsifying Properties

2020 ◽  
Vol 11 (3) ◽  
pp. 202-210
Author(s):  
Nurul Hazirah Hamidon ◽  
Dayang Norulfairuz Abang Zaidel ◽  
Yanti Maslina Mohd Jusoh
Keyword(s):  
Citric Acid ◽  
Sweet Potato ◽  
Emulsion Stability ◽  
Emulsifying Properties ◽  
Optimal Conditions ◽  
Emulsion System ◽  
Solution Ph ◽  
Natural Polysaccharide ◽  
Potato Peels ◽  
Extracting Solvent

Background: Pectin is a natural polysaccharide that has been used widely as a stabilizer in food emulsion system. Objective: This study aimed to optimize the yield of pectin extracted from sweet potato residue and investigate its emulsifying properties. Methods: Response surface methodology (RSM) has been utilized to investigate the pectin extracted from sweet potato peels using citric acid as the extracting solvent. Investigation of the effect of different extraction conditions namely temperature (°C), time (min) and solution pH on pectin yield (%) were conducted. A Box-Benhken design with three levels of variation was used to optimize the extraction conditions. Results: The optimal conditions determined were at temperature 76°C, time 64 min and pH 1.2 with 65.2% yield of pectin. The degree of esterification (DE) of the sweet potato pectin was determined using Fourier Transform Infrared (FTIR) Spectroscopy. The pectin is a high-methoxyl pectin with DE of 58.5%. Emulsifying properties of sweet potato pectin was investigated by measuring the zeta-potential, particle size and creaming index with addition of 0.4 and 1.0 wt % pectin to the emulsion. Conclusion: Extraction using citric acid could improve the pectin yield. Improved emulsion stability was observed with the addition of the sweet potato pectin.

Extraction of Polysaccharides from Pumpkin by Ultrasonic Method and it’s Primary Antioxidant Activities Research

2011 ◽  
Vol 183-185 ◽  
pp. 1970-1974
Author(s):  
Jie Sun ◽  
Guo You Yin ◽  
Hua Zhang ◽  
Lan Ying Chen ◽  
Chang Zheng Hu
Keyword(s):  
Antioxidant Activities ◽  
Ultrasonic Method ◽  
Dependent Manner ◽  
Ultrasonic Power ◽  
Liquid Ratio ◽  
Optimum Parameters ◽  
Ultrasonic Time ◽  
Total Antioxidant ◽  
Primary Antioxidant ◽  
Solid Liquid

In this study, effects of ultrasound processing time, ultrasound power and solid liquid ratio of ultrasonic on pumpkin polysaccharide extraction were investigated. The optimum parameters of extracting pumpkin polysaccharides are obtained by orthogonal test. Antioxidant activity were evaluated by using various established invitro systems, including 1,1-diphenyl-2-picrylhydrazylthe(DPPH•), hydroxyl(•OH) and FRAP system. Results showed that the extraction rate of polysaccharides pumpkin could up to 12.37% which the condition were water as extractant, ultrasonic time is 10min, ultrasonic power is 400w, solid to liquid ratio is 1:20. The polysaccharide raised the total antioxidant capacity in a dose-dependent manner. The results suggested that polysaccharide had direct and potent antioxidant activities.

Optimization of the NDV-N-2-HACC/CMC Microspheres Preparation

2013 ◽  
Vol 804 ◽  
pp. 85-88
Author(s):  
Qian Chen ◽  
Hong Kang ◽  
Yang Zhang ◽  
Hao Wu ◽  
Chun Xiao Dai ◽  
...  
Keyword(s):  
Particle Size ◽  
Zeta Potential ◽  
Encapsulation Efficiency ◽  
Entrapment Efficiency ◽  
Factorization Method ◽  
Optimal Conditions ◽  
Orthogonal Factorization ◽  
Main Factors ◽  
Average Size

Purpose:in this study, the conditions of the preparation of NDV-N-2-HACC/CMC microspheres are optimized. Methods:Using entrapment efficiency, particle size, Zeta potential as the evaluating indicators, 3 main factors to influence the preparation for microspheres were optimized by orthogonal factorization method. Result:The optimal conditions were 1.0 mg/ml HACC, 1.2 mg/ml CMC, 1:3 (v/v) NDV/HACC, and 1200 r/min and 30 min for stirring. The range of particle size was 192.1-595.2 nm, and average size was 304.3 nm. Zeta potential was +32.50 mV; encapsulation efficiency (EE) was (98.96±2.1) %.Conclusion:the conditions of the preparation of NDV-N-2-HACC/CMC microspheres are optimized.

scholarly journals The effect of cultivation conditions on the growing processes of grape plants in vitro

2021 ◽  
Vol 39 ◽  
pp. 03001
Author(s):  
Irina Pavlova ◽  
E. Luschay ◽  
M. Kosyuk ◽  
A. Abdurashitova ◽  
Viktor Klimenko
Keyword(s):  
Cold Storage ◽  
Genetic Material ◽  
Shoot Length ◽  
Optimal Conditions ◽  
Cultivation Conditions ◽  
Grape Varieties

One of alternative ways to maintain valuable genetic material is to develop optimal conditions for cultivation in an in vitro system. The goal was to evaluate the condition of plants based on changes in the shoot length indicator in order to explore the maintaining mode of the collection. We took the experimental samples from the “Vegetating collection of plants in vitro of promising varieties and clones of grapes”: 13 local Crimean varieties and 9 varieties of the Institute Magarach selection. Plant containing culture bottles were in the cold storage without internal lighting at 10-12°C for 6 months. The cultivation findings demonstrated that grape varieties differed in viability and intensity of morphogenesis. Moreover, after storage, they had a high regenerating ability of the buds.

scholarly journals Ultrasound-assisted preparation of calcium malate and its absorption

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0254583
Author(s):  
Wuren Ma ◽  
Yizhou Lv ◽  
Xuan Cao ◽  
Mengzhi Wang ◽  
Yunpeng Fan ◽  
...  
Keyword(s):  
Ultrasonic Method ◽  
Animal Experiments ◽  
Calcium Content ◽  
Raw Material ◽  
Tartrate Resistant Acid Phosphatase ◽  
Bovine Bone ◽  
Ultrasonic Power ◽  
Acid Ratio ◽  
Ultrasound Assisted ◽  
Calcium Malate

In this experiment, response surface methodology was used to study the preparation of malic acid calcium salt from bovine bones assisted by ultrasonication. The results showed that the optimum conditions for ultrasound-assisted preparation of calcium malate from bovine bone were as follows: solid-liquid ratio 1:15, solid-acid ratio 1:1.5, ultrasonic power 200 W, ultrasonic temperature 35°C, and ultrasonication time 17 min. The efficiency of calcium recovery was 66.16%, and the purity was 92.54%. After three ultrasonic treatments of 17 min each, the calcium malate conversion rate of bovine bone reached 95.73%. Animal experiments showed that feeding bovine bone-derived calcium malate significantly increased alkaline phosphatase (ALP) activity and bone calcium content, reduced tartrate-resistant acid phosphatase (TRAP) activity, and maintained the balance of serum calcium and phosphorus. These results indicated that the ultrasonic method effectively ionized calcium in bovine bone, which provides a reference point for the industrial production of calcium products with bovine bone as the raw material.

scholarly journals Synthesis and characterization of isoniazid immobilized polylactide-co-glycolide nanoparticles

2021 ◽  
Vol 101 (1) ◽  
pp. 61-70
Author(s):  
Ye.M. Tazhbayev ◽  
◽  
A.R. Galiyeva ◽  
T.S. Zhumagaliyeva ◽  
M.Zh. Burkeyev ◽  
...  
Keyword(s):  
Physicochemical Parameters ◽  
Surfactant Concentration ◽  
Synthesis And Characterization ◽  
Optimal Conditions ◽  
Drug Form ◽  
Synthesis Parameters ◽  
Antituberculous Drug ◽  
Average Size ◽  
Instrumental Methods

This article considers someaspects of synthesis and characterizationof polylactide-co-glycolide nanoparticles immobilized withthe antituberculous drug isoniazid. The influence of some synthesis parameters of nanoparticles (the ratio of drug substance:polymer and surfactant concentration) onproperties of the obtained nanosomal drug form of isoniazid has been studied. Optimal conditions for obtainingthenanoparticles with the best physicochemical parameters such as: particle size, polydispersity, conversion, etc. have been found. These nanoparticlescan be used asdrug carriers.The results revealed thata polymer: drug ratio of 1:1 and the use of 3% Twin 80 are necessaryto obtain stable emulsions of nanoparticles of polylactide-co-glycolide with satisfactory characteristics. Average size of the obtained particles was 196.4 nm,and the polydispersity value was 0.323. The aggregation stability of nanoparticles during 4 hours at temperatures of 4ºC and 20ºC has been evaluated. The morphology of the obtained nanoparticles has been studied.Analysis of nanoparticles was characterized by various instrumental methods includinggas chromatography and thermogravimetrytechniques. The resulting nanoparticles of polylactide-co-glycolide immobilized with isoniazid are stable in time andcanprolong the action of the drug. In vitrorelease of isoniazid from polylactide-co-glycolide nanoparticles hasbeen studied.

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