Some observations on the fine structure of the marine brown alga Phaeostrophion irregulare

1968 ◽  
Vol 46 (11) ◽  
pp. 1369-1375 ◽  
Author(s):  
Victor L. Bourne ◽  
Kathleen Cole
Keyword(s):  
Fine Structure ◽  
Comparative Studies ◽  
Brown Algae ◽  
Brown Alga ◽  
Structure Study ◽  
Outer Membranes ◽  
Interesting Variation ◽  
Heterogeneous Tissue ◽  
Mature Thallus ◽  
Marine Brown Alga

In a fine-structure study of Phaeostrophion irregulare (Dictyosiphonales) most characteristics of the organelles and their interrelationships were found to be similar to those previously reported for other brown algae. However, there was an interesting variation regarding the pyrenoid and the nucleus–chloroplast association in the macroscopic thallus. The pyrenoid is present in the cells of the sporeling but absent from the thallus which grows directly from it. In addition, there is no evidence of any connection between the outer membranes of the nucleus and the chloroplast in the cells of the blade. The significance of these findings is discussed in relation to the phyletic importance of the pyrenoid and the possible implications of observing a limited number of heterogeneous tissue types, such as spore, sporeling, and mature thallus, in comparative studies.

ELECTRON MICROSCOPE OBSERVATIONS ON CHLOROPLASTS OF CULTURED LEATHESIA DIFFORMIS (L.) ARESCH.

1968 ◽  
Vol 10 (1) ◽  
pp. 63-67 ◽  
Author(s):  
Kathleen Cole ◽  
Victor Bourne ◽  
Shu Chang Lin
Keyword(s):  
Electron Microscope ◽  
Brown Algae ◽  
Brown Alga ◽  
Intermediate Region ◽  
Chloroplast Structure ◽  
Ultrastructure Study ◽  
Marine Brown Alga

During an ultrastructure study of cells of both parental field material and cultured sporelings of the marine brown alga Leathesia difformis (Chordariales) it was noted that chloroplasts of the field thalli were typical of those previously reported in other brown algae. However, at least two features of chloroplast structure were unique in many cells of the cultured sporelings: constant three-thylakoid type banding without variation in the number of discs and the formation of extra bands between the regular ones in an intermediate region, resulting in a stack of as many as 40 to 60 long, loosely-associated discs.

Effect of the marine brown alga Canistrocarpus cervicornis on promastigote forms of Leishmania (L.) amazonensis

Planta Medica ◽  
2009 ◽  
Vol 75 (09) ◽  
Author(s):  
AO Santos ◽  
EA Britta ◽  
T Ueda-Nakamura ◽  
BP Dias Filho ◽  
EM Bianco ◽  
...  
Keyword(s):  
Brown Alga ◽  
Canistrocarpus Cervicornis ◽  
Marine Brown Alga

scholarly journals Movement of Fe with respect to the heme plane in the R-T transition of carp hemoglobin. An extended x-ray absorption fine structure study.

1986 ◽  
Vol 261 (13) ◽  
pp. 5689-5692 ◽  
Author(s):  
M R Chance ◽  
L J Parkhurst ◽  
L S Powers ◽  
B Chance
Keyword(s):  
Fine Structure ◽  
Structure Study ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

Structure study of the chalcogens and chalcogenides by X-ray absorption fine structure

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Hiroyuki Ikemoto ◽  
Takafumi Miyanaga
Keyword(s):  
Fine Structure ◽  
Covalent Bond ◽  
Narrow Channel ◽  
Structure Study ◽  
Chain Structure ◽  
Covalent Bonds ◽  
X Ray ◽  
Absorption Fine ◽  
Amorphous States ◽  
X Ray Absorption

AbstractIn this review, we make a survey of the structure studies for the chalcogen elements and several chalcogenides in liquid, amorphous and nanosized state by using X-ray absorption fine structure (XAFS). The chalcogen elements have hierarchic structures; the chain structure constructed with the strong covalent bond as a primary structure, and the weaker interaction between chains as a secondary one. Existence of these two kinds of interactions induces exotic behaviors in the liquid, amorphous and nanosized state of the chalcogen and chalcogenides. XAFS is a powerful structure analysis technique for multi-element systems and the disordered materials, so it is suitable for the study of such as liquid, amorphous and nanosized mixtures. In section 2, the structures for the liquid state are discussed, which show the interesting semiconductor-metal transition depending on their temperatures and components. In section 3, the structure for the amorphous states are discussed. Especially, some of chalcogens and chalcogenides present the photostructural change, which is important industrial application. In section 4, the structures of nanosized state, nanoparticles and isolated chain confined into the narrow channel, are discussed. The studies of the nanoparticle and the isolated chain reveal the alternative role between the intrachain covalent bonds and the interchain interaction.

scholarly journals Isolation of Guanosine Diphosphate d-Mannuronic Acid from the Marine Brown Alga, Fucus gardneri Silva

1964 ◽  
Vol 239 (3) ◽  
pp. PC944-PC946
Author(s):  
Tsau-Yen Lin ◽  
W.Z. Hassid
Keyword(s):  
Brown Alga ◽  
Guanosine Diphosphate ◽  
Mannuronic Acid ◽  
Marine Brown Alga

scholarly journals Pathway of Alginic Acid Synthesis in the Marine Brown Alga, Fucus gardneri Silva

1966 ◽  
Vol 241 (22) ◽  
pp. 5284-5297
Author(s):  
Tsau-Yen Lin ◽  
W.Z. Hassid
Keyword(s):  
Brown Alga ◽  
Alginic Acid ◽  
Acid Synthesis ◽  
Marine Brown Alga

Neutron induced damage in reactor pressure vessel steel: An X-ray absorption fine structure study

2009 ◽  
Vol 385 (2) ◽  
pp. 312-318 ◽  
Author(s):  
G. Kuri ◽  
S. Cammelli ◽  
C. Degueldre ◽  
J. Bertsch ◽  
D. Gavillet
Keyword(s):  
Fine Structure ◽  
Pressure Vessel ◽  
Structure Study ◽  
Reactor Pressure Vessel ◽  
Pressure Vessel Steel ◽  
Vessel Steel ◽  
X Ray ◽  
Reactor Pressure Vessel Steel ◽  
X Ray Absorption ◽  
Reactor Pressure

Extended x-ray-absorption fine-structure study of Ag particles isolated in solid argon

1984 ◽  
Vol 30 (2) ◽  
pp. 672-677 ◽  
Author(s):  
P. A. Montano ◽  
W. Schulze ◽  
B. Tesche ◽  
G. K. Shenoy ◽  
T. I. Morrison
Keyword(s):  
Fine Structure ◽  
Structure Study ◽  
X Ray ◽  
Absorption Fine ◽  
Ag Particles ◽  
Solid Argon ◽  
X Ray Absorption

Meroditerpenoids from the southern Australian marine brown alga Sargassum fallax

2009 ◽  
Vol 70 (2) ◽  
pp. 250-255 ◽  
Author(s):  
Priyanka Reddy ◽  
Sylvia Urban
Keyword(s):  
Brown Alga ◽  
Marine Brown Alga
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