Electrochemical Observation of Individual Collision-Blocking Events of TX-100 Nanomicelles: An Accurate and Universal Approach for the Critical Micelle Concentration Determination of Surfactants

2021 ◽  
pp. 339179
Author(s):  
Yao Meng ◽  
Minshu Du ◽  
Yiqing Yang ◽  
Qianni Cheng ◽  
Fahe Cao
Keyword(s):  
Critical Micelle Concentration ◽  
Concentration Determination ◽  
Universal Approach

Concentration determination of chromatin in unstained resin-embedded sections by means of Z-contrast in STEM

1990 ◽  
Vol 48 (2) ◽  
pp. 186-187
Author(s):  
M. Haider ◽  
B. Bohrmann
Keyword(s):  
Energy Loss ◽  
Freeze Substitution ◽  
Biological Macromolecules ◽  
Local Concentration ◽  
E Coli ◽  
Concentration Determination ◽  
Phosphorous Content ◽  
Z Contrast ◽  
Electron Energy Loss

The technique of Z-contrast in STEM offers the possibility to determine the local concentration of macromolecules like lipids, proteins or DNA. Contrast formation depends on the atomic composition of the particular structure. In the case of DNA, its phosphorous content discriminates it from other biological macromolecules. In our studies, sections of E. coli, the dinoflagellate Amphidinium carterae and Euglena spec. cells were used which were obtained by cryofixation followed by freeze-substitution into acetone with 3% glutaraldehyde. The samples were then embedded either in Lowicryl HM20 at low temperature or in Epon at high temperature. Sections were coated on both sides with 30Å carbon.The DF- and the inelastic image have been recorded simultaneously with a Cryo-STEM. This Cryo-STEM is equipped with a highly dispersive Electron Energy Loss Spectrometer. With this instrument pure Z-contrast can be achieved either with a Filtered DF-image divided by the inelastic image or, as is used in this paper, by dividing the conventional DF-image by an inelastic image which has been recorded with an inelastic detector whose response is dependent on the total energy loss of the inelastically scattered electrons.

Concentration determination of oxygen nanobubbles in electrolyzed water

2009 ◽  
Vol 329 (2) ◽  
pp. 306-309 ◽  
Author(s):  
Kenji Kikuchi ◽  
Aoi Ioka ◽  
Takeo Oku ◽  
Yoshinori Tanaka ◽  
Yasuhiro Saihara ◽  
...  
Keyword(s):  
Electrolyzed Water ◽  
Concentration Determination

Single step method for the accurate concentration determination of polysorbate 80

1997 ◽  
Vol 786 (1) ◽  
pp. 99-106 ◽  
Author(s):  
Travis H. Tani ◽  
Jamie M. Moore ◽  
Thomas W. Patapoff
Keyword(s):  
Single Step ◽  
Polysorbate 80 ◽  
Step Method ◽  
Concentration Determination
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