scholarly journals Understanding DNA Organization in the Nucleus By Fluorescence Microscopy and Energy Filtered Transmission Electron Microscopy

2002 ◽  
Vol 8 (S02) ◽  
pp. 74-75
Author(s):  
D.P. Bazett-Jones
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fluorescence Microscopy ◽  
Transmission Electron ◽  
Dna Organization

scholarly journals Correlating Fluorescence Microscopy with Electron Microscopy

2004 ◽  
Vol 12 (1) ◽  
pp. 3-7
Author(s):  
Stephen W. Carmichael ◽  
Jon Charlesworth
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fluorescence Microscopy ◽  
Fluorescent Probes ◽  
Cell Biology ◽  
Microscopic Image ◽  
Electron Microscopic ◽  
Transmission Electron ◽  
Electron Microscopic Image ◽  
Auto Fluorescence

The use of fluorescent probes is becoming more and more common in cell biology. It would be useful if we were able to correlate a fluorescent structure with an electron microscopic image. The ability to definitively identify a fluorescent organelle would be very valuable. Recently, Ying Ren, Michael Kruhlak, and David Bazett-Jones devised a clever technique to correlate a structure visualized in the light microscope, even a fluorescing cell, with transmission electron microscopy (TEM).Two keys to the technique of Ren et al are the use of grids (as used in the TEM) with widely spaced grid bars and the use of Quetol as the embedding resin. The grids allow for cells to be identified between the grid bars, and in turn the bars are used to keep the cell of interest in register throughout the processing for TEM. Quetol resin was used for embedding because of its low auto fluorescence and sectioning properties. The resin also becomes soft and can be cut and easily peeled from glass coverslips when heated to 70°C.

scholarly journals Invasion of Spores of the Arbuscular Mycorrhizal Fungus Gigaspora decipiens by Burkholderia spp

2003 ◽  
Vol 69 (10) ◽  
pp. 6250-6256 ◽  
Author(s):  
Avram Levy ◽  
Barbara J. Chang ◽  
Lynette K. Abbott ◽  
John Kuo ◽  
Gerry Harnett ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fluorescence Microscopy ◽  
Dna Sequences ◽  
Arbuscular Mycorrhizal Fungus ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Transmission Electron ◽  
Electron And Fluorescence Microscopy ◽  
Scanning Electron

ABSTRACT Burkholderia species are bacterial soil inhabitants that are capable of interacting with a variety of eukaryotes, in some cases occupying intracellular habitats. Pathogenic and nonpathogenic Burkholderia spp., including B. vietnamiensis, B. cepacia, and B. pseudomallei, were grown on germinating spores of the arbuscular mycorrhizal fungus Gigaspora decipiens. Spore lysis assays revealed that all Burkholderia spp. tested were able to colonize the interior of G. decipiens spores. Amplification of specific DNA sequences and transmission electron microscopy confirmed the intracellular presence of B. vietnamiensis. Twelve percent of all spores were invaded by B. vietnamiensis, with an average of 1.5 × 106 CFU recovered from individual infected spores. Of those spores inoculated with B. pseudomallei, 7% were invaded, with an average of 5.5 × 105 CFU recovered from individual infected spores. Scanning electron and fluorescence microscopy provided insights into the morphology of surfaces of spores and hyphae of G. decipiens and the attachment of bacteria. Burkholderia spp. colonized both hyphae and spores, attaching to surfaces in either an end-on or side-on fashion. Adherence of Burkholderia spp. to eukaryotic surfaces also involved the formation of numerous fibrillar structures.

scholarly journals Fertility potential in a man with ankylosing spondylitis as revealed by semen analysis by light, electron and fluorescence microscopy

2018 ◽  
Vol 6 ◽  
pp. 2050313X1875989 ◽  
Author(s):  
Katerina Chatzimeletiou ◽  
Nikiforos Galanis ◽  
Alexandros Karagiannidis ◽  
Antonia Sioga ◽  
George Pados ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ankylosing Spondylitis ◽  
Fluorescence Microscopy ◽  
Dna Fragmentation ◽  
Sperm Quality ◽  
In Situ Hybridisation ◽  
Terminal Deoxynucleotidyl Transferase ◽  
Fluorescence In Situ Hybridisation ◽  
Transmission Electron

Ankylosing spondylitis affects 0.1%–0.5% of the adult population. The aim was to investigate the possible effects of both the disease and its treatment on semen quality by performing a highly detailed analysis in a man with ankylosing spondylitis, presenting for infertility. Sperm characteristics were evaluated by light microscopy, morphology by electron microscopy (transmission electron microscopy), DNA fragmentation by terminal deoxynucleotidyl transferase dUTP nick end labeling using fluorescence microscopy and chromosomal abnormalities by fluorescence in situ hybridisation using probes for chromosomes 13,15,16,18,21,22,X and Y. There was no evidence for an effect of either ankylosing spondylitis or its treatment with celecoxib and sulphasalazine on sperm quality as all parameters including concentration, motility, DNA fragmentation and aneuploidy incidence were within normal limits. Transmission electron microscopy, however, revealed a high incidence of head, neck and tail abnormalities, as well as the presence of immature sperm and phagocytes. Hysteroscopic removal of an endometrial polyp enabled the achievement of a spontaneous pregnancy and the delivery of a healthy boy.

Conidium development in the Hyalorhinocladiella anamorphs of Ceratocystiopsis minuta-bicolor and Ophiostoma minus

1996 ◽  
Vol 74 (6) ◽  
pp. 891-897 ◽  
Author(s):  
E. Benade ◽  
M. J. Wingfield ◽  
P. S. Van Wyk
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fluorescence Microscopy ◽  
Type Species ◽  
Conidiogenous Cell ◽  
Transmission Electron

The genus Hyalorhinocladiella was characterized by its simple conidiophores with conidiogenous cells that proliferate sympodially. However, recent studies revealed that the Hyalorhinocladiella anamorph of Ophiostoma ips has annellidic conidium development. The aim of this study was to determine whether other species in the genus share this characteristic. Conidium development was examined in the type species, Hyalorhinocladiella minuta-bicolor, and in the Hyalorhinocladiella anamorph of Ophiostoma minus. Light and fluorescence microscopy indicated that conidia developed by sympodial proliferation. In contrast, scanning and transmission electron microscopy revealed distinct annellations on the conidiogenous cells. Conidium development in Hyalorhinocladiella is therefore annellidic, and the appearance of sympodial development results from displacement of the long axis of the conidiogenous cell through percurrent proliferation. The circumscription of the genus Hyalorhinocladiella is therefore revised to include annellidic conidium development. Keywords: Hyalorhinocladiella, Ophiostoma, sympodial, annellidic, conidium development.

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