Nafion®117 modified by low dose EB irradiation: surface structure and physical properties

2002 ◽  
Vol 12 (6) ◽  
pp. 1650-1656 ◽  
Author(s):  
Lois J. Hobson ◽  
Hideyuki Ozu ◽  
Masanori Yamaguchi ◽  
Miho Muramatsu ◽  
Shuji Hayase
Keyword(s):  
Physical Properties ◽  
Surface Structure ◽  
Low Dose

Visualizing {110} Surface Structure of Equilibrium-form ZIF-8 Crystals by Low-dose Cs-corrected TEM

Nanoscale ◽  
2021 ◽  
Author(s):  
Xiaocang Han ◽  
Wenqian Chen ◽  
Rui Su ◽  
Yuan Tian ◽  
Pan Liu ◽  
...  
Keyword(s):  
Surface Structure ◽  
Low Dose ◽  
Low Energy ◽  
Zeolitic Imidazolate Frameworks ◽  
Equilibrium Form ◽  
Energy Surfaces

The properties of Zeolitic imidazolate frameworks (ZIFs) crystals highly depend on the structures of the low-energy surfaces, such as {110} of ZIF-8. However, the atomic/molecular configurations of the ZIF-8 {110}...

scholarly journals Characterization of Ion Exchange Membranes with Special Surface Structure

2017 ◽  
Author(s):  
Eliška Stránská ◽  
Kristýna Weinertová ◽  
David Neděla ◽  
Jan Křivčík
Keyword(s):  
Ion Exchange ◽  
Physical Properties ◽  
Surface Structure ◽  
Flat Surface ◽  
Ion Exchange Membrane ◽  
Membrane Properties ◽  
Ion Exchange Membranes ◽  
Geometrical Structures ◽  
Special Surface ◽  
Exchange Membrane

This article focuses on the preparation of the heterogeneous ion exchange membrane with a special surface structure made with three types of knitted fabric. The special surface structure of ion exchange membranes can be useful for the intensification of mass transfer processes in electrodialysis.Three types of structured ion exchange membranes were prepared together with a membrane with a flat surface to compare the influence of geometrical structures on the behaviour of ion exchange membrane properties. Electrochemical, mechanical and physical properties were determined. Structured membranes exhibited comparable electrochemical and physical properties to the flat ion exchange membrane. Some transport parameters were measured in an electrodialysis stack with two concentrations of solution. Two electrodialysis stacks with different sizes of active area were used for comparison. Improving efficiency and mass flux was not confirmed. It was not demonstrated that structured IEMs were not better than IEMs with the flat surface.

scholarly journals The Effect of Irradiation to Sensoric Characteristic, Physic and Microbe in Sie Balu, Acehnese Dried Meat

2017 ◽  
Vol 2 (1) ◽  
pp. 12-17
Author(s):  
Wiqayatun Khazanah ◽  
Nurliana Nurliana ◽  
Rini Safitri
Keyword(s):  
Physical Properties ◽  
Irradiation Dose ◽  
Storage Time ◽  
Low Dose ◽  
Traditional Food ◽  
Pathogenic Microorganisms ◽  
Nutritional Content ◽  
Dose Irradiation ◽  
Preservation Method ◽  
And Storage

One of the Acehnese traditional food  preserved by the addition of salt, acid and dried was sie balu. The preservation method may lead to changes in the structure and nutritional content. Sie balu with the addition of vinegar, garlic and ginger can reduce the value of water activity (aW), pH and bacterial counts. This condition affects the physical properties and sensory of sie balu. Irradiation can control pathogenic microorganisms in meat without affecting the physical condition. Low-dose irradiation is able to maintain the desired sensory attributes nutritious food products. This study aims to determine the characteristics of the sensory and physic sie baluthat irradiated with increasing doses and the shelf life of 3-6 weeks. Sie balu was made of 10 kg fresh beef, dried in the sun to dry, vacuum and irradiated at doses of 5, 7 and 9 kGy. Sensory test conducted by taste sie balu by trained panelists and fill out the hedonicform. The physical properties based on pH and aW. The microbe total calculated used Total Plate Count.The results showed that the irradiation dose significantly (P <0.05) affected on microbe total, aroma, color, texture and taste of sie balu. Storage time does not affect the sensory properties. Irradiation dose and storage time significantly (P <0.05) on pH and aWsiebalu. The study concluded that irradiation can improve the physical properties, sensory and microorganisme reductionof sie balu.

Electrical resistivity of fluorinated carbon black

1988 ◽  
Vol 3 (5) ◽  
pp. 890-897 ◽  
Author(s):  
Matthew H. Luly
Keyword(s):  
High Pressure ◽  
Electrical Resistivity ◽  
Carbon Black ◽  
Physical Properties ◽  
Surface Structure ◽  
Pressure Dependence ◽  
Rapid Change ◽  
Fluorine Content ◽  
Aggregate Structure ◽  
Fluorinated Carbon

The electrical resistivity of fluorinated carbon black particles, CFx, is reported as a function of fluorine content, pressure, and temperature. Fluorination does not destroy the aggregate structure of carbon black, but does change its physical properties. The resistivity changes from 10−2 to 10+12 Ω cm as x increases from 0 to 1.2, with a very rapid change occurring in the range 0.08≤x≤0.27. Samples with x = 0 and x = 0.07 exhibit a pressure dependence described by p∝ P−s with s>0. Fully fluorinated samples (x = 1.2) have s≃0. Intermediate compositions have low-pressure regimes where the resistivity is independent of pressure, and high-pressure regimes with s>0. For all samples exhibiting pressure-dependent resistivity, s increases as x increases. For samples with low-fluorine content, the resisitivity increases with decreasing temperature. These observations are interpreted in terms of structure, especially surface structure.

Airglow discharge plasma treatment affects the surface structure and physical properties of zein films

2020 ◽  
Vol 273 ◽  
pp. 109813 ◽  
Author(s):  
Yuan Li ◽  
Yan Bai ◽  
Jiayin Huang ◽  
Chunhong Yuan ◽  
Tian Ding ◽  
...  
Keyword(s):  
Physical Properties ◽  
Plasma Treatment ◽  
Surface Structure ◽  
Discharge Plasma

scholarly journals Inverse problems of NEO photometry: Imaging the NEO population

2006 ◽  
Vol 2 (S236) ◽  
pp. 151-166 ◽  
Author(s):  
Mikko Kaasalainen1 ◽  
Josef Ďurech
Keyword(s):  
Inverse Problems ◽  
Physical Properties ◽  
Surface Structure ◽  
Mathematical Analysis ◽  
Large Scale ◽  
Spin States ◽  
The Earth

AbstractThe physical properties of NEOs and other asteroids are mostly obtained with photometry. The resulting models describe the shapes, spin states, scattering properties and surface structure of the targets, and are the solutions of inverse problems involving comprehensive mathematical analysis. We review what can and cannot be obtained from photometric (and complementary) data, and how all this is done in practice. The role of photometry will become completely dominating with the advent of large-scale surveys capable of producing calibrated brightness data. Due to their quickly changing geometries with respect to the Earth, NEOs are the population that can be mapped the fastest.

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).

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