scholarly journals Theoretical Study of Affecting Parameters on Drying Process of Organic Materials. (Dept. M.)

2020 ◽  
Vol 38 (3) ◽  
pp. 24-39
Author(s):  
M. Mousa ◽  
A. Fouda ◽  
M. Jehad
Keyword(s):  
Organic Materials ◽  
Theoretical Study ◽  
Drying Process

Experimental and theoretical study of the structure of N,N-dimethyl-4-nitroaniline derivatives as model compounds for non-linear optical organic materials

2002 ◽  
Vol 604 (1) ◽  
pp. 73-86 ◽  
Author(s):  
Oleg Ya Borbulevych ◽  
Ronald D Clark ◽  
Angela Romero ◽  
Li Tan ◽  
Mikhail Yu Antipin ◽  
...  
Keyword(s):  
Organic Materials ◽  
Theoretical Study ◽  
Model Compounds ◽  
Non Linear ◽  
Linear Optical

Theoretical study on self-assembly in organic materials

2009 ◽  
Vol 5 (1) ◽  
pp. 2-10
Author(s):  
Jianming Chen ◽  
Qikai Li ◽  
Lingyi Meng ◽  
Zhigang Shuai
Keyword(s):  
Self Assembly ◽  
Organic Materials ◽  
Theoretical Study

scholarly journals The consumption of exergy for lignite drying with different technologies: a comparative theoretical study

2018 ◽  
Author(s):  
Junjie Yan ◽  
Ming Liu ◽  
Shan Wang ◽  
Rongtang Liu ◽  
Xiaoqu Han
Keyword(s):  
Consumption Rate ◽  
Exergy Analysis ◽  
Theoretical Study ◽  
Drying Process ◽  
Drying Temperature ◽  
Fluid Bed ◽  
Consumption Rates ◽  
Exergy Consumption ◽  
Exergetic Analysis ◽  
Analysis Models

Pre-drying is an effective method to upgrade lignite and broaden its utilization areas. Various drying technologies could be applied to pre-dry lignite. The drying temperature in these drying technologies are different, which means that energy at different grades is used in these dryers. To analyze the irreversibilities of drying process, the exergetic analysis models are developed in this study. The exergy feeding and consumption rates are defined as the indicators. Various lignite drying technologies are calculated and quantitatively compared. Results show that exergy consumption rate for steam fluid-bed dryer is the smallest, which is 432.6 kJ (kg H2O)-1. Keywords: lignite; drying technologies; exergy analysis; thermodynamics  

Application of Improved Voltage Compensation in the SEM to Imaging of Organic Materials

1973 ◽  
Vol 31 ◽  
pp. 444-445
Author(s):  
P.J. Killingworth ◽  
M. Warren
Keyword(s):  
Electron Beam ◽  
Organic Materials ◽  
Operating Parameters ◽  
Low Density ◽  
Beam Diameter ◽  
Incident Electron Beam ◽  
Specimen Material ◽  
Voltage Compensation ◽  
Selection Of ◽  
Scanning Electron

Ultimate resolution in the scanning electron microscope is determined not only by the diameter of the incident electron beam, but by interaction of that beam with the specimen material. Generally, while minimum beam diameter diminishes with increasing voltage, due to the reduced effect of aberration component and magnetic interference, the excited volume within the sample increases with electron energy. Thus, for any given material and imaging signal, there is an optimum volt age to achieve best resolution.In the case of organic materials, which are in general of low density and electric ally non-conducting; and may in addition be susceptible to radiation and heat damage, the selection of correct operating parameters is extremely critical and is achiev ed by interative adjustment.

Video real-time imaging of artificial membranes during freeze-drying by cryo-electron microscopy

1988 ◽  
Vol 46 ◽  
pp. 16-17
Author(s):  
Alan S. Rudolph ◽  
Ronald R. Price
Keyword(s):  
Real Time ◽  
Self Assembly ◽  
Freeze Drying ◽  
Video Capture ◽  
Drying Process ◽  
Artificial Membranes ◽  
The Past ◽  
Cryo Electron Microscopy ◽  
Spherical Structures ◽  
Capture Techniques

We have employed cryoelectron microscopy to visualize events that occur during the freeze-drying of artificial membranes by employing real time video capture techniques. Artificial membranes or liposomes which are spherical structures within internal aqueous space are stabilized by water which provides the driving force for spontaneous self-assembly of these structures. Previous assays of damage to these structures which are induced by freeze drying reveal that the two principal deleterious events that occur are 1) fusion of liposomes and 2) leakage of contents trapped within the liposome [1]. In the past the only way to access these events was to examine the liposomes following the dehydration event. This technique allows the event to be monitored in real time as the liposomes destabilize and as water is sublimed at cryo temperatures in the vacuum of the microscope. The method by which liposomes are compromised by freeze-drying are largely unknown. This technique has shown that cryo-protectants such as glycerol and carbohydrates are able to maintain liposomal structure throughout the drying process.

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