Biosorption of Cr(VI) from aqueous solutions by nonliving green algae Cladophora albida

2009 ◽  
Vol 22 (4) ◽  
pp. 372-377 ◽  
Author(s):  
Liping Deng ◽  
Yang Zhang ◽  
Jie Qin ◽  
Xinting Wang ◽  
Xiaobin Zhu
2015 ◽  
Vol 57 (39) ◽  
pp. 18438-18445 ◽  
Author(s):  
Hossein Sayyaf ◽  
Gholam Reza Mostafaii ◽  
Leila Iranshahi ◽  
Gholam Abbas Mosavi ◽  
Elham Aseman

2018 ◽  
Vol 25 (8) ◽  
pp. 1733-1738 ◽  
Author(s):  
Ali A. Al-Homaidan ◽  
Hussein S. Al-Qahtani ◽  
Abdullah A. Al-Ghanayem ◽  
Fuad Ameen ◽  
Ibraheem B.M. Ibraheem

2001 ◽  
Vol 35 (17) ◽  
pp. 4079-4085 ◽  
Author(s):  
V.K. Gupta ◽  
A.K. Shrivastava ◽  
Neeraj Jain

Author(s):  
K. J. Böhm ◽  
a. E. Unger

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:


Author(s):  
L. V. Leak

Electron microscopic observations of freeze-fracture replicas of Anabaena cells obtained by the procedures described by Bullivant and Ames (J. Cell Biol., 1966) indicate that the frozen cells are fractured in many different planes. This fracturing or cleaving along various planes allows one to gain a three dimensional relation of the cellular components as a result of such a manipulation. When replicas that are obtained by the freeze-fracture method are observed in the electron microscope, cross fractures of the cell wall and membranes that comprise the photosynthetic lamellae are apparent as demonstrated in Figures 1 & 2.A large portion of the Anabaena cell is composed of undulating layers of cytoplasm that are bounded by unit membranes that comprise the photosynthetic membranes. The adjoining layers of cytoplasm are closely apposed to each other to form the photosynthetic lamellae. Occassionally the adjacent layers of cytoplasm are separated by an interspace that may vary in widths of up to several 100 mu to form intralamellar vesicles.


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