scholarly journals Formulation and physical properties observations of soy lecithin liposome containing 4-n-butylresorcinol

2016 ◽  
Author(s):  
Rini Dwiastuti ◽  
Sri Noegrohati ◽  
Enade Perdana Istyastono ◽  
Marchaban
Keyword(s):  
Physical Properties ◽  
Soy Lecithin ◽  
Lecithin Liposome

Physical properties of goat milk powder with soy lecithin added before spray drying

2011 ◽  
Vol 46 (3) ◽  
pp. 608-611 ◽  
Author(s):  
Carolina R. Fonseca ◽  
Milena S. G. Bento ◽  
Ednelí S. M. Quintero ◽  
Ana Lúcia Gabas ◽  
Carlos A. F. Oliveira
Keyword(s):  
Physical Properties ◽  
Spray Drying ◽  
Milk Powder ◽  
Goat Milk ◽  
Soy Lecithin

Soy Lecithin Liposome as Potential Platform for Intravenous Delivery of Quercetin in Cancer Treatment

2019 ◽  
Author(s):  
Diem-Huong Nguyen Tran ◽  
Ngoc Thuy Trang Le ◽  
Hong Thao Truong ◽  
Van Du Cao ◽  
Cuu Khoa Nguyen ◽  
...  
Keyword(s):  
Cancer Treatment ◽  
Soy Lecithin ◽  
Lecithin Liposome

Influence of Emulsifiers on Physical Properties of Oil/Water Emulsions Containing Ostrich Oil

2018 ◽  
Vol 777 ◽  
pp. 592-596
Author(s):  
Juthaporn Ponphaiboon ◽  
Sontaya Limmatvapirat ◽  
Chutima Limmatvapirat
Keyword(s):  
Zeta Potential ◽  
Physical Properties ◽  
Droplet Size ◽  
Emulsion Stability ◽  
Tween 80 ◽  
High Viscosity ◽  
Soy Lecithin ◽  
Oil Emulsion ◽  
Oil Water ◽  
Oil Emulsions

The fabrication of oil/water (O/W) emulsions in order to prepare the spray-dried encapsulated bioactive ostrich oil emulsions can be useful for increasing stability of commercial products. In this study, O/W emulsions were stabilized with mixed emulsifiers (Span and Tween) or soy lecithin. The effects of emulsifiers on the physical properties of emulsions containing ostrich oil were investigated. Results showed that the addition of a mixture of Span and Tween emulsifiers at concentrations between 5 and 15% w/w reduced the droplet size of the emulsions but did not decrease the zeta potential in the emulsion system. The smallest droplet size of 5.01±0.43 μm was obtained from the emulsion containing 15% w/w mixture of Span 20 and Tween 80. The zeta potential values of all emulsions containing a mixture of Span and Tween emulsifiers in the concentration range of 5 to 20% w/w were between-23 and-55 mV. In addition, the viscosity of these emulsions increased with increases in the concentrations of both emulsifiers. The stable 20% w/w ostrich oil emulsion stabilized with 15% w/w Span 20/Tween 80 presented viscosity equal to 69.56±1.82 cP. For 10% w/w ostrich oil emulsions stabilized with lecithin, the droplet size and zeta potential of the emulsions tended to decrease with increasing lecithin concentrations. An emulsion containing 10% w/w lecithin exhibited the smallest droplet size (3.93±0.11 μm). The zeta potential values of all emulsions composed of 1-15% w/w lecithin were between-33 and –66 mV and the viscosity of these emulsions increased with increases in the concentrations of lecithin. The stable 10% w/w ostrich oil emulsion stabilized with 10% w/w lecithin exhibited a high viscosity of 172.50±1.01cP. In summary, 10% w/w lecithin provides better emulsion stability than 15% w/w Span 20/Tween 80. These results therefore reveal important parameters for the fabrication of stable O/W emulsions containing ostrich oil.

scholarly journals FORMULASI SEDIAAN GEL NANOPARTIKEL LIPID EKSTRAK DAUN BI-NAHONG (Anredera cordifolia (Ten.) Steenis)

2020 ◽  
Vol 3 (2) ◽  
pp. 40
Author(s):  
Rini Dwiastuti ◽  
Shinta Elvina Ardiyati
Keyword(s):  
Physical Properties ◽  
Leaf Extract ◽  
Water Solubility ◽  
Physical Stability ◽  
Lipid Nanoparticles ◽  
Stability Test ◽  
Soy Lecithin ◽  
Freeze Thaw ◽  
Lipid Nanoparticle ◽  
Gel Preparation

ABSTRACT Binahong leaf extract has low water solubility. To increase the solubility of binahong leaf extract, it is necessary to formulate lipid nanoparticle gel dosage form. Lipid nanoparticles are preparations that can deliver both hydrophilic and lipophilic drugs. This study aims to make a gel lipid nanoparticles from binahong leaf extract with the physical properties parameters of the gel preparation. This research is a  experimental study with independent variables of the concentration of binahong extract and variables depending on the size of the lipid nanoparticles and the physical properties of the gel. Gel making was done by using a variation of the amount of extract 5% and 10%. Testing the physical properties of the gel includes organoleptic, viscosity, dispersibility, pH, homogeneity, and syneresis. The physical stability test carried out is accelerated stability test using the freeze thaw cycling method for 3 cycles. Based on the results of the PSA test, of the two formulas made, one formula fulfills the range 50-100 nm. After testing the physical properties of the gel, the two formulas had a dispersion capacity within the 3-5 cm range, were homogeneous, and did not occur syneresis. The results of the viscosity test showed that the two formulas did not meet the 20-30 Pa.s. The pH test results showed that the two formulas did not meet the pH range 4.5-6.5. Key word: binahong; lipid nanoparticle; soy lecithin, gel ABSTRAKEkstrak daun binahong memiliki kelarutan dalam air yang rendah. Untuk meningkatkan kelarutan ekstrak daun binahong, perlu dilakukan formulasi sediaan dalam bentuk gel nanopartikel lipid. Nanopartikel lipid merupakan sediaan yang dapat membawa obat hidrofilik maupun lipofilik. Penelitian ini bertujuan untuk membuat gel nanopartikel lipid ekstrak daun binahong yang  memenuhi parameter sifat fisis sediaan gel. Penelitian ini merupakan eksperimental murni dengan variabel bebas konsentrasi ekstrak binahong dan variabel tergantung ukuran nanopartikel lipid dan sifat fisis gel. Pembuatan gel dilakukan dengan menggunakan variasi jumlah ekstrak 5% dan 10%. Pengujian sifat fisis gel meliputi organoleptis, viskositas, daya sebar, pH, homogenitas, dan sineresis.. Uji stabilitas fisis yang dilakukan adalah uji stabilitas dipercepat dengan metode freeze thaw cycling selama 3 siklus. Berdasarkan hasil uji PSA, dari dua formula yang dibuat, satu formula memenuhi rentang 50-100 nm. Setelah dilakukan uji sifat fisik gel, kedua formula memiliki daya sebar sesuai rentang 3-5 cm, homogen, dan tidak terjadi sineresis. Hasil uji viskositas menunjukkan kedua formula tidak memenuhi rentang 20-30 Pa.s. Hasil uji pH menunjukkan kedua formula tidak memenuhi rentang pH 4,5-6,5. Kata Kunci: binahong; nanopartikel lipid; soy lecithin, gel

The Photometric Properties of the Ap Stars

1976 ◽  
Vol 32 ◽  
pp. 365-377 ◽  
Author(s):  
B. Hauck
Keyword(s):  
Physical Properties ◽  
Ap Stars

The Ap stars are numerous - the photometric systems tool It would be very tedious to review in detail all that which is in the literature concerning the photometry of the Ap stars. In my opinion it is necessary to examine the problem of the photometric properties of the Ap stars by considering first of all the possibility of deriving some physical properties for the Ap stars, or of detecting new ones. My talk today is prepared in this spirit. The classification by means of photoelectric photometric systems is at the present time very well established for many systems, such as UBV, uvbyβ, Vilnius, Geneva and DDO systems. Details and methods of classification can be found in Golay (1974) or in the proceedings of the Albany Colloquium edited by Philip and Hayes (1975).

The Infection of Cells by Bullet-Shaped Viruses

1969 ◽  
Vol 27 ◽  
pp. 372-373
Author(s):  
Frederick A. Murphy ◽  
Alyne K. Harrison ◽  
Sylvia G. Whitfield
Keyword(s):  
Electron Microscopy ◽  
Physical Properties ◽  
Host Cell ◽  
Thin Section ◽  
Cultured Cells ◽  
Cell Infection ◽  
Thin Section Electron Microscopy ◽  
Section Electron ◽  
Section Electron Microscopy

The bullet-shaped viruses are currently classified together on the basis of similarities in virion morphology and physical properties. Biologically and ecologically the member viruses are extremely diverse. In searching for further bases for making comparisons of these agents, the nature of host cell infection, both in vivo and in cultured cells, has been explored by thin-section electron microscopy.

Transmission electron microscopy of composite materials

1988 ◽  
Vol 46 ◽  
pp. 1012-1015
Author(s):  
K.P.D. Lagerlof
Keyword(s):  
Composite Materials ◽  
Physical Properties ◽  
Structural Defects ◽  
Structural Composites ◽  
Multiphase Materials ◽  
Structural Reinforcement ◽  
Transmission Electron ◽  
Reinforced Fiber ◽  
Particulate Reinforced Composites ◽  
Definition Of

Although most materials contain more than one phase, and thus are multiphase materials, the definition of composite materials is commonly used to describe those materials containing more than one phase deliberately added to obtain certain desired physical properties. Composite materials are often classified according to their application, i.e. structural composites and electronic composites, but may also be classified according to the type of compounds making up the composite, i.e. metal/ceramic, ceramic/ceramie and metal/semiconductor composites. For structural composites it is also common to refer to the type of structural reinforcement; whisker-reinforced, fiber-reinforced, or particulate reinforced composites [1-4].For all types of composite materials, it is of fundamental importance to understand the relationship between the microstructure and the observed physical properties, and it is therefore vital to properly characterize the microstructure. The interfaces separating the different phases comprising the composite are of particular interest to understand. In structural composites the interface is often the weakest part, where fracture will nucleate, and in electronic composites structural defects at or near the interface will affect the critical electronic properties.

Physical Properties of Polymers

2004 ◽  
Author(s):  
James Mark ◽  
Kia Ngai ◽  
William Graessley ◽  
Leo Mandelkern ◽  
Edward Samulski ◽  
...  
Keyword(s):  
Physical Properties
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