Highly selective colorimetric and fluorescent detection for Hg2+ in aqueous solutions using a dipeptide-based chemosensor

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 56356-56361 ◽  
Author(s):  
Jooyoung Park ◽  
Byunggyu In ◽  
Keun-Hyeung Lee
Keyword(s):  
Aqueous Solutions ◽  
Fluorescent Detection

A dipeptide-based chemosensor selectively and sensitively detected HgII in aqueous solutions by colorimetric change and fluorescent change.

Sensitive and selective ratiometric fluorescent detection of monosaccharides in aqueous solutions at physiological pH using self-assembled peptides with different aromatic side chains

2017 ◽  
Vol 41 (7) ◽  
pp. 2593-2603 ◽  
Author(s):  
Lok Nath Neupane ◽  
Pramod Kumar Mehta ◽  
Keun-Hyeung Lee
Keyword(s):  
Aqueous Solutions ◽  
The Self ◽  
Fluorescent Detection ◽  
Side Chains ◽  
Self Assembled ◽  
Aromatic Side Chains

The control of disassembly of supramolecular nanostructures of the self-assembled peptides by monosaccharides was investigated for the fluorescent detection of monosaccharides in aqueous solutions.

Selective ratiometric red-emission detection of In3+ in aqueous solutions and in live cells using a fluorescent peptidyl probe and metal chelating agent

The Analyst ◽  
2020 ◽  
Vol 145 (11) ◽  
pp. 4031-4040
Author(s):  
Joohee Park ◽  
Hyeongseok Yu ◽  
See-Hyoung Park ◽  
Keun-Hyeung Lee
Keyword(s):  
Aqueous Solutions ◽  
Ground Water ◽  
Detection Method ◽  
Chelating Agent ◽  
Fluorescent Detection ◽  
Live Cells ◽  
Red Emission ◽  
Metal Chelating ◽  
Emission Detection

A ratiometric fluorescent detection method for In3+ in aqueous buffered solution, ground water, and live cells was developed.

Ultrathin frozen sections of yeast without aldehyde prefixation

1978 ◽  
Vol 36 (2) ◽  
pp. 58-59
Author(s):  
K. J. Böhm ◽  
a. E. Unger
Keyword(s):  
Aqueous Solutions ◽  
Biological Material ◽  
Yeast Cells ◽  
Frozen Sections ◽  
Good Preservation ◽  
Ultrathin Frozen Sections

During the last years it was shown that also by means of cryo-ultra-microtomy a good preservation of substructural details of biological material was possible. However the specimen generally was prefixed in these cases with aldehydes.Preparing ultrathin frozen sections of chemically non-prefixed material commonly was linked up to considerable technical and manual expense and the results were not always satisfying. Furthermore, it seems to be impossible to carry out cytochemical investigations by means of treating sections of unfixed biological material with aqueous solutions.We therefore tried to overcome these difficulties by preparing yeast cells (S. cerevisiae) in the following manner:

Imaging polymers, proteins and dna in aqueous solutions with the atomic force microscope

1989 ◽  
Vol 47 ◽  
pp. 32-33
Author(s):  
S.A.C. Gould ◽  
B. Drake ◽  
C.B. Prater ◽  
A.L. Weisenhorn ◽  
S.M. Lindsay ◽  
...  
Keyword(s):  
Amino Acids ◽  
Dna Sequencing ◽  
Aqueous Solutions ◽  
Atomic Force Microscope ◽  
Piezoelectric Crystal ◽  
Atomic Force ◽  
Structure Of Molecules ◽  
Optical Lever

The atomic force microscope (AFM) is an instrument that can be used to image many samples of interest in biology and medicine. Images of polymerized amino acids, polyalanine and polyphenylalanine demonstrate the potential of the AFM for revealing the structure of molecules. Images of the protein fibrinogen which agree with TEM images demonstrate that the AFM can provide topographical data on larger molecules. Finally, images of DNA suggest the AFM may soon provide an easier and faster technique for DNA sequencing.The AFM consists of a microfabricated SiO2 triangular shaped cantilever with a diamond tip affixed at the elbow to act as a probe. The sample is mounted on a electronically driven piezoelectric crystal. It is then placed in contact with the tip and scanned. The topography of the surface causes minute deflections in the 100 μm long cantilever which are detected using an optical lever.

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