scholarly journals Choledocystus elegans (Digenea: Plagiorchiidae) of Leptodactylus paraensis (Amphibia: Leptodactylidae) from the Brazilian Amazon

2017 ◽  
Vol 26 (4) ◽  
pp. 511-515 ◽  
Author(s):  
Tássia Fernanda Furo Gomes ◽  
Francisco Tiago de Vasconcelos Melo ◽  
Elane Guerreiro Giese ◽  
Adriano Penha Furtado ◽  
Jeannie Nascimento dos Santos
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Small Intestine ◽  
Brazilian Amazon ◽  
The Body ◽  
Pore Region ◽  
C Elegans ◽  
Morphological Aspects ◽  
First Time ◽  
Scanning Electron

Abstract The trematodes are parasites of the several vertebrates including amphibians, however the knowledge about of the taxonomy these parasites is still confuse. The trematode Choledocystus elegans was found in the small intestine of the Leptodactylus paraensis in eastern Amazon and presents the following characteristics: several pointed tegumentary spines, papillae on the outer and inner edges of the oral and ventral suckers, a round, well-developed cirrus sac, a well-developed cirrus, oblique testicles, a ovary right side, uterine loops extending between the testicles, follicular vitellaria distributed throughout the body, starting at the genital pore region and caeca close the end of the body. For the first time, this study identified C. elegans parasitizing L. paraensis and describes morphological aspects never characterized using light and scanning electron microscopy.

Scanning electron microscopy of the cuticular armature of the nematode Gnathostoma spinigerum Owen, 1836 from cats in Laos

1990 ◽  
Vol 64 (3) ◽  
pp. 255-262 ◽  
Author(s):  
Tomáš Scholz ◽  
Oleg Ditrich
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Spatial Arrangement ◽  
Felis Catus ◽  
The Body ◽  
Immature Female ◽  
Gnathostoma Spinigerum ◽  
First Time ◽  
Scanning Electron

ABSTRACTThe body surface of an immature female Gnathostoma spinigerum found for the first time in the definitive host (Felis catus f. domestica) in Laos was studied using a scanning electron microscope. All types of cuticular spines, which are one of the most important features for species identification of gnathostomid nematodes, together with their spatial arrangement, are described and figured.

scholarly journals Pterygodermatites (Multipectines) affinis (Jägerskiöl, 1904) (Nematoda: Rictulariidae), a parasite of Cerdocyon thous (Linnaeus, 1766) (Carnivora: Canidae) from the Brazilian Amazon

2020 ◽  
Vol 29 (3) ◽  
Author(s):  
Naida Paola Araújo da Silva ◽  
Ana Rita de Lima ◽  
Érika Branco ◽  
Raul Henrique da Silva Pinheiro ◽  
Elane Guerreiro Giese
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Brazilian Amazon ◽  
The Body ◽  
Bright Field ◽  
Wild Mammals ◽  
Bright Field Microscopy ◽  
Cerdocyon Thous ◽  
Morphology And Morphometry ◽  
Scanning Electron

Abstract Among the Nematodes of Cerdocyon thous, the genus Pterygodermatites is characteristic for presenting cuticular projections along the body, being mentioned in different hosts in South America, although there are no records of its occurrence in the Amazon Biome. To enable further exploration in terms of their morphology and morphometry, the nematodes collected from cadavers of C. thous were fixed and observed using bright field microscopy and scanning electron microscopy, revealing characteristics compatible with P. (Multipectines) affinis, thus contributing more information about the geographic distribution of the parasite, as well as knowledge of the helminthological fauna of wild mammals in the Brazilian Amazon.

Morphology and surface structure of eggs and first instar larvae of  Croce schmidti (Navás, 1927) (Neuroptera: Nemopteridae)

Zootaxa ◽  
2007 ◽  
Vol 1554 (1) ◽  
pp. 49-55
Author(s):  
ALİ SATAR ◽  
ZEKİYE SULUDERE ◽  
SELAMİ CANDAN ◽  
SAVAŞ CANBULAT
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Structure ◽  
The Body ◽  
First Instar ◽  
First Time ◽  
Scanning Electron ◽  
Adhesive Materials ◽  
Brown Color

The morphology of eggs and first instar larvae of Croce schmidti (Navás, 1927) is described and figured for the first time using light and scanning electron microscopy. The females were collected from Derik, Mardin Province, Turkey and maintained in the laboratory. The eggs are elongate and cylindrical with rounded ends and bear a small terminal micropylar knob. Except for the adhesive materials, the chorion surface is smooth. The newly emerged larva of C. schmidti is characterized by a slightly quadrangular head and short prothorax and has prominent pale dark brown color markings on the metatergites. The body is covered with short brown setae, which include macrotrichia and dolichasters.

SCANNING ELECTRON MICROSCOPE: POSSIBILITIES FOR STUDYING KIDNEY DISEASES

2020 ◽  
pp. 176-182
Author(s):  
Mamaeva S.N. ◽  
Vinokurov R.R. ◽  
Munkhalova Ya.A. ◽  
Dyakonova D.P. ◽  
Platonova V.A. ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Filtration Rate ◽  
Kidney Diseases ◽  
First Time ◽  
Scanning Electron

Currently, due to the intensive development of high-tech science-intensive medical and research devices, more and more attention is paid to the development of diagnostics of rare and difficult to diagnose diseases. It is known that among numerous nephropathies, hematuria may be the only symptom of kidney and urinary tract diseases, which complicates their diagnosis and treatment. In order to develop new approaches for the diagnosis of nephropathies, the authors have been studying the morphology of red blood cells in the blood and urine of children and adults using a scanning electron microscope for several years. The paper presents the results of studies of children with various kidney diseases, including IgA-nephropathy, and chronic glomerulonephritis. Scanning electron microscopy was used for the first time to detect nanoparticles on the surface of red blood cells, the size of which is comparable to the size of viruses, which became the basis for one of the authors ' assumptions, namely, the possible transport of certain types of viruses by red blood cells. Thus, some kidney diseases could be considered virus-associated. This paper presents for the first time the results of determining the glomerular filtration rate of both kidneys separately in the study of separate kidney function and of the study of urine smears obtained during catheterization of the ureters in patients with hydronephrosis of one of the kidneys by scanning electron microscopy. As in previous studies, nanoparticles were found on the surface of red blood cells, which leads to the conclusion about the possible viral nature of the disease of the considered patient. In addition, smear images obtained using a microscope showed a significant difference in the elements of the right and left kidneys urine, which did not contradict the data on the study of glomerular filtration rate. According to the authors, the capabilities of the scanning electron microscope can be applied in fundamental research of kidney diseases at the cellular and molecular levels, forming new ideas about their origin, as well as on the basis of which new methods of non-invasive diagnostics can be built.

scholarly journals Labellum and gynostemium micromorphology in Polystachya (Orchidaceae)

2020 ◽  
Vol 307 (1) ◽  
Author(s):  
Mytnik Joanna ◽  
Davies L. Kevin ◽  
Narajczyk Magdalena ◽  
Łuszczek Dorota ◽  
Kubiak Joanna ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sub Saharan Africa ◽  
Capitate Trichomes ◽  
Sub Saharan ◽  
First Time ◽  
Scanning Electron

AbstractPolystachya is a large, pantropical orchid genus of 200 species, most of which occur as epiphytes in sub-saharan Africa. The three-lobed labellum of most Polystachya species possesses a fleshy callus and various types of trichomes and papillae. In this paper, we present the results of micromorphological studies on the labellum of 20 species, representing eight of the 13 sections in the genus, using scanning electron microscopy (SEM). Our results show the scale of infrageneric diversity of trichomes and papillae relative to the sampled sections. They also demonstrate the taxonomic value of labellar micromorphology at the sectional level. The study revealed seven types of papillae and five types of trichomes (uni- and multi-cellular) in Polystachya, some of which, are described here for the first time. Clavate trichomes are the most common and are present in 60% of the species studied. Moniliform trichomes mainly occur in sect. Polystachya and are strongly characteristic of the section. Pseudopollen is formed by fragmentation of moniliform trichomes or the detachment of other trichomes as bicellular units. We provide, for the first time, evidence for the detachment of the terminal cells of capitate trichomes.

Preparation of Alcohol-Preserved Larvae of Culicidae (Diptera) for Scanning Electron Microscopy

1972 ◽  
Vol 3 (3) ◽  
pp. 181-188 ◽  
Author(s):  
Christine Dahl
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
The Body ◽  
Taxonomic Studies ◽  
Scanning Electron ◽  
Sem Studies

AbstractA method for preparation of alcohol-preserved culicid larvae for Scanning Electron Microscope (SEM) studies is described. It is based on dehydration by ethanol-xylol and fast evaporation of xylol in +8o° C. for ten minutes. For taxonomic studies such as examination of pecten teeth, comb scales and microtrichiae in magnifications up to 6oooX the method is suitable. For studies of receptor structures on hair-tufts and microstructures of the body integument alcohol preserved material is less satisfactory. The microstructure of the comb scales is figured and their function discussed. Differences in the ultrastructure of the abdominal hair-tufts are pointed out.

Scanning Electron Microscopy Coupled with Energy Dispersive Spectrometric Analysis Reveals for the First Time Weddellite and Sylvite Crystals on the Surface of Involucral Bracts and Petals of two Xeranthemum L. (Compositae) Species

2017 ◽  
Vol 23 (3) ◽  
pp. 679-686 ◽  
Author(s):  
Milan Gavrilović ◽  
Suzana Erić ◽  
Petar D. Marin ◽  
Núria Garcia-Jacas ◽  
Alfonso Susanna ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Glandular Trichomes ◽  
Energy Dispersive ◽  
Spectrometric Analysis ◽  
Eds Analysis ◽  
Taxonomic Studies ◽  
First Time ◽  
Tetragonal Bipyramid ◽  
Scanning Electron

AbstractIn this work, weddellite and sylvite crystals are identified for the first time on the involucral bracts and petals of Xeranthemum annuum and Xeranthemum cylindraceum using scanning electron microscopy coupled with energy dispersive spectrometric (SEM-EDS) analysis. Well-developed crystals of weddellite (CaC2O4·2H2O) occur in the form of a tetragonal bipyramid (hhl), rarely in combination of a bipyramid and tetragonal prism (h00). Indumentum of involucral bracts of X. cylindraceum consists of nonglandular and glandular trichomes. Sylvite (KCl) crystals are observed only on the petal surface of X. cylindraceum. The crystals of sylvite occur in the form of perfect cubes (hexahedrons), but some crystals are deformed, i.e., partially elongated. Taxonomic significance of investigated microcharacters as well as the use of SEM-EDS analysis in taxonomic studies of plants are discussed.

scholarly journals Capture and scanning electron microscopy of individual snow crystals

1994 ◽  
Vol 40 (134) ◽  
pp. 195-197
Author(s):  
E. W. Wolff ◽  
A. P. Reid
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Liquid Nitrogen Temperature ◽  
Experimental Methods ◽  
Snow Crystal ◽  
Snow Crystals ◽  
First Time ◽  
Scanning Electron

AbstractA snow crystal has been successfully collected on to a scanning electron microscope (SEM) stub in central Greenland. It was preserved at liquid-nitrogen temperature for 5 months, prior to examination in the SEM. This is believed to be the first time a snow crystal has been observed directly in the SEM and offers some new experimental methods for understanding crystals and their chemistry.

Ascospore sculpturing and generic concepts in the Testudinaceae (syn. Zopfiaceae)

1979 ◽  
Vol 57 (2) ◽  
pp. 91-99 ◽  
Author(s):  
D. L. Hawksworth
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Combination ◽  
The Family ◽  
First Time ◽  
Scanning Electron

Generic concepts in the Testudinaceae (Ascomycotina, Loculoascomycetes) are reviewed with particular emphasis on the sculpturing of the ascospores which has been examined by scanning electron microscopy (SEM) for the first time. A key to the nine genera accepted in the family is provided of which two are described as new: Ulospora for U. bilgramii comb.nov. (= Zopfia bilgramii D. Hawksw. et al.), the ascospores of which have three to six deep fissures in each cell, and Zopfiofoveola for Z. punctata comb.nov. (= Zopfia punctata D. Hawksw. & C. Booth), with distinctly and regularly foveolate ascospores. One further new combination is made: Rechingeriella boudieri comb.nov. (= Zopfia boudieri Arnaud). The positions of three additional genera referred to the family by earlier authors but which are excluded from it here are also briefly discussed.

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