Metallic iron for the removal of metals and metalloids from aqueous solutions: An old timer view

2021 ◽  
pp. 100256
Author(s):  
Chicgoua Noubactep
Keyword(s):  
Aqueous Solutions ◽  
Metallic Iron ◽  
Metals And Metalloids

BIOMATERIALS AS ADSORBENTS FOR METAL(LOID) WATER POLLUTANTS

2017 ◽  
Author(s):  
Lucia Kořenková ◽  
Martin Urík
Keyword(s):  
Aqueous Solutions ◽  
Case Studies ◽  
Removal Efficiency ◽  
Toxic Metals ◽  
Toxic Metal ◽  
Theoretical Knowledge ◽  
Metals And Metalloids ◽  
Water Pollutants ◽  
Original Idea

The original idea of this scientific monograph was to provide information on current theoretical knowledge on biosorption, including evaluation of toxic metal(loid)s’ removal efficiency from aqueous solutions by various biosorbents which were employed in recent studies. However, our publication is going a step further in order to help the reader to comprehend the extent and complexity of biosorption research. Here, we also provide five experimental case studies which evaluate the biosorption of toxic metals and metalloids from different perspectives applying various types of biomass.

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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