Occurrence of Heteropolaria lwoffi (Fauré-Fremiet, 1943) and Apiosoma piscicola Blanchard, 1885 (Ciliata) on Salvelinus fontinalis (Mitchill) in Nova Scotia, Canada

1987 ◽  
Vol 65 (10) ◽  
pp. 2426-2429 ◽  
Author(s):  
D. K. Cone ◽  
P. H. Odense
Keyword(s):  
Electron Microscope ◽  
Nova Scotia ◽  
North America ◽  
Scanning Electron Microscope ◽  
Salvelinus Fontinalis ◽  
Fish Farm ◽  
Mucous Cells ◽  
First Report ◽  
Scanning Electron

Heteropolaria lwoffi (Fauré-Fremiet, 1943) and Apiosoma piscicola Blanchard, 1885 (Ciliata) are reported from fry of Salvelinus fontinalis (Mitchill) at a fish farm in Nova Scotia. The specimens were examined with a scanning electron microscope. Heteropolaria lwoffi attached to pore walls of mucous cells. Apiosoma piscicola had an affinity for the attached scopula of H. lwoffi. Bacterial microcolonies were associated with the adhesive substance secreted by the scopulas but there was no evidence of colony expansion into the underlying skin. The study represents the first specific identifications of stalked peritrichs from salmonids in North America and the first report of A. piscicola on the continent.

SYNOPSIS OF THE GENUS MESTOCHARIS FÖRSTER IN AMERICA NORTH OF MEXICO (CHALCIDOIDEA: EULOPHIDAE)

1976 ◽  
Vol 108 (7) ◽  
pp. 755-758 ◽  
Author(s):  
Carl M. Yoshimoto
Keyword(s):  
Electron Microscope ◽  
New Species ◽  
North America ◽  
Scanning Electron Microscope ◽  
Key To Species ◽  
First Report ◽  
Two New Species ◽  
Scanning Electron

AbstractTwo new species, Mestocharis nearctica and M. tropicalis (Chalcidoidea: Eulophidae), are described from North America with a key to species and scanning electron microscope photographs. This is the first report of the genus Mestocharis from North America.

Scanning Electron Microscope Study of Root Canal Filling (First Report)

1987 ◽  
Vol 41 (6) ◽  
pp. 1238-1243
Author(s):  
Yohichiroh Soh ◽  
Junroh Tahara ◽  
Takashi Hayashikawa ◽  
Masatoshi Hitaka ◽  
Kohzoh Kubota ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Root Canal ◽  
Microscope Study ◽  
Electron Microscope Study ◽  
Root Canal Filling ◽  
Scanning Electron Microscope Study ◽  
First Report ◽  
Scanning Electron

Glugea hertwigi. [Descriptions of Fungi and Bacteria].

2019 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
Electron Microscope ◽  
North America ◽  
Scanning Electron Microscope ◽  
Freshwater Fish ◽  
Rough Surface ◽  
Geographical Distribution ◽  
Fish Parasite ◽  
Brackish Waters ◽  
The Family ◽  
Scanning Electron

Abstract This article describes the morphology, morphometrics, and geographical distribution of the freshwater fish parasite Glugea hertwigi infecting fish of the family Osmeridae (smelts) in freshwater of north temperate to boreal Europe and North America and nearby seas and brackish waters. Using a scanning electron microscope, spores of this species have a rough surface with loose folds and longitudinal wrinkles. This distinguishes them from spores of G. anomala. This parasite can be found in Canada, USA, Finland, Germany, and Russia.

scholarly journals Gills scanning images of the seawater fish Eugerres brasilianus (Gerreidae)

2000 ◽  
Vol 43 (4) ◽  
pp. 421-423 ◽  
Author(s):  
Daura Regina Eiras-Stofella ◽  
Patricia Charvet-Almeida
Keyword(s):  
Content Analysis ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Stomach Content Analysis ◽  
Branchial Arch ◽  
Feeding Habit ◽  
Mucous Cells ◽  
Adult Fish ◽  
Pharyngeal Region ◽  
Scanning Electron

The gills of the adult fish, Eugerres brasilianus (Gerreidae) were analyzed in a scanning electron microscope. The stratified epithelium was uniform on all parts of the branchial arch. Concentric microridges were present on cells that form this epithelium and were mainly observed in the primary lamellae and pharyngeal region where mucous cells were also abundant. The ultrastructural features of E. brasilianus gills indicated that this was not a filtering species, and that the feeding habit included mainly the intake of small organisms. The results presently obtained agreed with other literature data which determined the feeding habit of this species by means of stomach content analysis and other aspects.

Autoecious species of Puccinia on Cichorieae in North America

1981 ◽  
Vol 59 (6) ◽  
pp. 1078-1101 ◽  
Author(s):  
J. A. Parmelee ◽  
D. B. O. Savile
Keyword(s):  
Electron Microscope ◽  
North America ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Microscope Examination ◽  
Electron Microscope Examination ◽  
Morphological Differences ◽  
Scanning Electron

Seventeen autoecious species of Puccinia occurring on Cichorieae (Asteraceae) in North America were studied. The taxa removed from those usually treated synonymously with P. hieracii include: P. troximontis Pk. and P. hypochaeridis Oud., which are segregated because of their completely echinulate urediniospores. Puccinia agoseridis sp.nov. is also segregated from the same complex because of difference in teliospore wall sculpturing. Both varieties of P. harknessii stand apart from P. hieracii by their more conspicuous teliospore warting. Puccinia harknessii var. harknessii attacks Lygodesmia while P. harknessii var. stephanomeriae comb.nov. occurs on Stephanomeria. Puccinia chondrillina is separated from P. hieracii by its smaller urediniospore tonsures and P. lapsanae possesses tonsures which are absent in P. variabilis. Such morphological differences become more evident with the use of scanning electron microscope examination to support observations with the light microscope.

Endosymbiotic Ciliated Protozoan Biota of Dromedary Camels and Domestic Cattle in Tunisia

Zootaxa ◽  
2020 ◽  
Vol 4859 (3) ◽  
pp. 409-418
Author(s):  
GÖZDE GÜRELLİ ◽  
ALI FOUZE OTHMAN ELHADI DAW
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Bos Taurus ◽  
Camelus Dromedarius ◽  
Ciliated Protozoan ◽  
Dromedary Camels ◽  
Species Concentration ◽  
First Report ◽  
The Mean ◽  
Scanning Electron

Species concentration and composition of endosymbiotic ciliates were investigated in the forestomach contents of 12 dromedary camels (Camelus dromedarius) and the ruminal contents of 16 domestic cattle (Bos taurus taurus) living in Ben Gardane, Tunisia. Sixteen species and 8 morphotypes, belonging to 8 genera, were identified from dromedary camels, and 18 species and 13 morphotypes, belonging to 8 genera, were identified from domestic cattle. This is the first report on the endosymbiotic ciliated protozoan biota of dromedary camels and cattle living in Tunisia. The mean density (± SD) of ciliates in the forestomach samples of dromedary camels and the ruminal samples of domestic cattle was 65.4 ± 69.4 × 104 cells mL–1 and 54.2 ± 55.8 × 104 cells mL–1, respectively. Diplodinium cameli and Blepharoconus krugerensis were detected for the first and second time, respectively, from the ruminal contents of cattle. Caloscolex camelinus and B. krugerensis were studied in detail with a scanning electron microscope. 

PROPERTIES OF TWO FRAGIPAN SOILS IN NOVA SCOTIA INCLUDING SCANNING ELECTRON MICROGRAPHS

1974 ◽  
Vol 54 (2) ◽  
pp. 159-170 ◽  
Author(s):  
CHANG WANG ◽  
J. L. NOWLAND ◽  
H. KODAMA
Keyword(s):  
Electron Microscope ◽  
Nova Scotia ◽  
Hydraulic Conductivity ◽  
Scanning Electron Microscope ◽  
Clay Fraction ◽  
Fine Sand ◽  
Scanning Electron Micrographs ◽  
Moderate Amount ◽  
High Bulk ◽  
Scanning Electron

About 250,000 acres of soil with fragipan have been mapped in Nova Scotia. The fragipan horizons of two soils (Tormentine and Debert) reported in this paper are typical for the province. They have high bulk densities and low saturated hydraulic conductivity. They are also low in organic carbon and free oxides. They are high in fine sand and silt but low in clay, and the fragments of fragipan are readily slaked in water. Mica, chlorite, vermiculite, and kaolinite were found in the clay fractions of both soils throughout the two profiles. A moderate amount of smectite was found in the clay fractions of the Ae horizon of Debert but not in the Tormentine profile. A significant amount of clay increase in both fine and total clay fraction was found in the Bf horizon of the Tormentine soil and the Bmgj and Btx horizons of the Debert soil, and results from translocation or lessivage. The brittleness and other associated properties of the fragipans were attributed to clay bridges linking coarser particles, which were shown in the scanning electron microscope pictures.

The Alteration of the Pore Spaces in Sandstones

1973 ◽  
Vol 31 ◽  
pp. 210-211
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
The Other ◽  
Coarse Grained ◽  
Depositional Fabric ◽  
Soluble Components ◽  
Scanning Electron ◽  
Shape And Size

The pore spaces in sandstones are the result of the original depositional fabric and the degree of post-depositional alteration that the rock has experienced. The largest pore volumes are present in coarse-grained, well-sorted materials with high sphericity. The chief mechanisms which alter the shape and size of the pores are precipitation of cementing agents and the dissolution of soluble components. Each process may operate alone or in combination with the other, or there may be several generations of cementation and solution.The scanning electron microscope has ‘been used in this study to reveal the morphology of the pore spaces in a variety of moderate porosity, orthoquartzites.

The Broad Applications of the Scanning Electron Microscope

1969 ◽  
Vol 27 ◽  
pp. 20-21
Author(s):  
C. T. Nightingale ◽  
S. E. Summers ◽  
T. P. Turnbull
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscopy ◽  
Surface Topography ◽  
Great Depth ◽  
Resolving Power ◽  
Depth Of Field ◽  
Pictorial Representations ◽  
Scanning Electron

The ease of operation of the scanning electron microscope has insured its wide application in medicine and industry. The micrographs are pictorial representations of surface topography obtained directly from the specimen. The need to replicate is eliminated. The great depth of field and the high resolving power provide far more information than light microscopy.

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