Structural characterization of cold extracted fraction of soluble sulfated polysaccharide from red seaweed Gracilaria birdiae

2008 ◽  
Vol 71 (4) ◽  
pp. 559-565 ◽  
Author(s):  
J MACIEL ◽  
L CHAVES ◽  
B SOUZA ◽  
D TEIXEIRA ◽  
A FREITAS ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Sulfated Polysaccharide ◽  
Red Seaweed ◽  
Gracilaria Birdiae

Structural characterization of an anticoagulant-active sulfated polysaccharide isolated from green alga Monostroma latissimum

2011 ◽  
Vol 85 (2) ◽  
pp. 394-400 ◽  
Author(s):  
Hongyan Li ◽  
Wenjun Mao ◽  
Xiuli Zhang ◽  
Xiaohui Qi ◽  
Yin Chen ◽  
...  
Keyword(s):  
Green Alga ◽  
Structural Characterization ◽  
Sulfated Polysaccharide ◽  
Monostroma Latissimum

scholarly journals Chemical characterization and antioxidant activity of sulfated polysaccharide from the red seaweed Gracilaria birdiae

2012 ◽  
Vol 27 (2) ◽  
pp. 287-292 ◽  
Author(s):  
Bartolomeu W.S. Souza ◽  
Miguel A. Cerqueira ◽  
Ana I. Bourbon ◽  
Ana C. Pinheiro ◽  
Joana T. Martins ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chemical Characterization ◽  
Sulfated Polysaccharide ◽  
Red Seaweed ◽  
Gracilaria Birdiae

scholarly journals Structural characterization of polysaccharide obtained from red seaweed Gracilaria caudata (J Agardh)

2013 ◽  
Vol 92 (1) ◽  
pp. 598-603 ◽  
Author(s):  
Francisco C.N. Barros ◽  
Draulio C. da Silva ◽  
Venicios G. Sombra ◽  
Jeanny S. Maciel ◽  
Judith P.A. Feitosa ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Red Seaweed

scholarly journals STRUCTURAL CHARACTERIZATION OF AGAR EXTRACTED FROM SIX RED SEAWEED SPECIES GROWING IN THE COAST OF VIETNAM

2017 ◽  
Vol 25 (2) ◽  
pp. 395-403
Author(s):  
Tran Thi Thanh Van ◽  
Bui Minh Ly ◽  
Ngo Quoc Buu ◽  
Chu Dinh Kinh
Keyword(s):  
Structural Characterization ◽  
Algal Species ◽  
Gel Strength ◽  
Raw Material ◽  
Spectroscopic Methods ◽  
Red Seaweed ◽  
Seaweed Species ◽  
Coast Of Vietnam ◽  
Agar Production

Polysaccharides extracted from six red seaweed species growing in Vietnam have been studied. Characterisation of their structure by chemical and spectroscopic methods showed that all of them have a basic repeating structure of alternating 3-linked b-D-galactopyranosyl and 4-linked 3,6-anhydro a-L-galactopyranosyl units with substituted methyl ether groups.   The native agar offers only weak gelling abilities owing to the 4-linked a-L-galactopyranosyl 6-sulfate as its precursor. Conversion of this unit into the corresponding 3,6-anhydride by treating with hot alkali generally led to gel strength increasing. The agars from G. fisheri and G. firma are poorly substituted, while those from G.asiatica, G.tenustipitata and G. heteroclada are partly methylated on position 6 of the 3-linked b-D- galactose. Agar from Gelidiella acerosa is partlly methylated on both positions 6 and 2 of the 4linked 3,6-anhydro a-L-galactose.   The alkali- modified agars have been obtained in acceptable quantities with gel strength of 300932 g/cm2. The obtained results showed that all the six algal species are suitable as raw material for commercial agar production and worthy of further cultivation

The involvement of the HO-1 pathway in the anti-inflammatory action of a sulfated polysaccharide isolated from the red seaweed Gracilaria birdiae

2011 ◽  
Vol 60 (12) ◽  
pp. 1121-1130 ◽  
Author(s):  
Edfranck de Sousa Oliveira Vanderlei ◽  
Ianna Wivianne Fernandes de Araújo ◽  
Ana Luíza Gomes Quinderé ◽  
Bruno Pedrosa Fontes ◽  
Ygor Raphael Gomes Eloy ◽  
...  
Keyword(s):  
Sulfated Polysaccharide ◽  
Red Seaweed ◽  
Anti Inflammatory ◽  
Gracilaria Birdiae ◽  
Inflammatory Action

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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