Quaternary Pnictides with Complex, Noncentrosymmetric Structures. Synthesis and Structural Characterization of the New Zintl Phases Na11Ca2Al3Sb8, Na4CaGaSb3, and Na15Ca3In5Sb12

2015 ◽  
Vol 54 (4) ◽  
pp. 1931-1939 ◽  
Author(s):  
Yi Wang ◽  
Stanislav Stoyko ◽  
Svilen Bobev
Keyword(s):  
Structural Characterization ◽  
Zintl Phases

scholarly journals Synthesis and structural characterization of the Zintl phases Na3Ca3TrPn4, Na3Sr3TrPn4, and Na3Eu3TrPn4 (Tr=Al, Ga, In; Pn=P, As, Sb)

2017 ◽  
Vol 249 ◽  
pp. 160-168 ◽  
Author(s):  
Yi Wang ◽  
Nian-Tzu Suen ◽  
Thabiso Kunene ◽  
Stanislav Stoyko ◽  
Svilen Bobev
Keyword(s):  
Structural Characterization ◽  
Zintl Phases

New ultrastructural findings about Borrelia burgdorferi by cryofixation, negative staining, thin sectioning and scanning techniques

1990 ◽  
Vol 48 (3) ◽  
pp. 582-583
Author(s):  
S. F. Hayes ◽  
M. D. Corwin ◽  
T. G. Schwan ◽  
D. W. Dorward ◽  
W. Burgdorfer
Keyword(s):  
Lyme Disease ◽  
Borrelia Burgdorferi ◽  
Structural Characterization ◽  
Negative Staining ◽  
Low Speed ◽  
Thin Sectioning ◽  
Ultrastructural Findings

Characterization of Borrelia burgdorferi strains by means of negative staining EM has become an integral part of many studies related to the biology of the Lyme disease organism. However, relying solely upon negative staining to compare new isolates with prototype B31 or other borreliae is often unsatisfactory. To obtain more satisfactory results, we have relied upon a correlative approach encompassing a variety EM techniques, i.e., scanning for topographical features and cryotomy, negative staining and thin sectioning to provide a more complete structural characterization of B. burgdorferi.For characterization, isolates of B. burgdorferi were cultured in BSK II media from which they were removed by low speed centrifugation. The sedimented borrelia were carefully resuspended in stabilizing buffer so as to preserve their features for scanning and negative staining. Alternatively, others were prepared for conventional thin sectioning and for cryotomy using modified procedures. For thin sectioning, the fixative described by Ito, et al.

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