scholarly journals Procamallanus spiculogubernaculus Agarwal, 1958 (Nematoda: Camallanidae) from Stinging catfish, Heteropneustes fossilis in India: morphological characterization and molecular data

2017 ◽  
Vol 54 (1) ◽  
pp. 68-76 ◽  
Author(s):  
A. Chaudhary ◽  
C. Verma ◽  
V. Tomar ◽  
H. S. Singh
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Dna Sequences ◽  
Molecular Data ◽  
Morphological Characterization ◽  
Systematic Evaluation ◽  
Cox1 Gene ◽  
Heteropneustes Fossilis ◽  
Posterior Portion ◽  
Scanning Electron

Summary The nematode, Procamallanus spiculogubernaculus Agarwal, 1958 was found from the Stinging catfish, Heteropneustes fossilis (Bloch, 1794) from Ghazipur, Delhi, India. Morphological characterization, including scanning electron microscope observation supplemented with DNA sequences is provided. Specimens recently found are characterized by the presence of an unlined buccal capsule having a small basal ring, esophagus muscular and glandular, vulva position is slightly post-equatorial, tail conical, long, and ending in three digit-like processes, phasmids present at about mid-length and cloaca located at the posterior end. In this study the species P. spiculogubernaculus is validated on the basis of molecular data after 47 years from its original description. In the scanning electron microscope examination, the topology of mouth and sensory pits in anterior portion, while the phasmids and digit like processes in posterior portion is clearly observed. Molecular data of the 18S ribosomal RNA and mitochondrial cytochrome c oxidase subunit 1 (cox1) gene were analyzed. Molecular phylogenetic analyses supported the validity of Procamallanus spiculogubernaculus and confirmed the paraphyletic status of the members of Procamallanus, Spirocamallanus, Camallanus and Paracamallanus. Taxonomic status of members of the family Camallanidae are briefly discussed along with the results of the systematic evaluation of P. spiculogubernaculus based on molecular data.

Morphological Characterization of Fabricated Aluminum Interdigitated Electrodes on Silicon Substrate

2015 ◽  
Vol 1109 ◽  
pp. 381-384
Author(s):  
M. Safwan Azmi ◽  
Sharipah Nadzirah ◽  
Uda Hashim
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Silicon Substrate ◽  
Morphological Characterization ◽  
Interdigitated Electrodes ◽  
Photolithography Process ◽  
Scanning Electron

The purpose of this paper is to study the morphological characterization of aluminum interdigitated electrodes (IDE) of different gap sizes on silicon substrate. The electrodes were fabricated using standard photolithography process and were done so with sizes of 12 μm, 10 μm and 7 μm. The electrodes were morphologically characterized using scanning electron microscope (SEM) and high-powered microscope (HPM).Keywords: morphological, interdigitated electrodes, aluminum

scholarly journals Morphological Characterization of the Polyflux 210H Hemodialysis Filter Pores

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
A. Hedayat ◽  
J. Szpunar ◽  
N. A. P. Kiran Kumar ◽  
R. Peace ◽  
H. Elmoselhi ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Morphological Characterization ◽  
Channel Structure ◽  
Maximum Diameter ◽  
Membrane Pore ◽  
Middle Molecules ◽  
Scanning Electron ◽  
Inner Pore

Background. Morphological characterization of hemodialysis membranes is necessary to improve pore design.Aim. To delineate membrane pore structure of a high flux filter, Polyflux 210H.Methods. We used a Joel JSM-6010LV scanning electron microscope (SEM) and a SU6600 Hitachi field emission scanning electron microscope (FESEM) to characterize the pore and fiber morphology. The maximal diameters of selected uremic toxins were calculated using the macromolecular modeling Crystallographic Object-Oriented Toolkit (COOT) software.Results. The mean pore densities on the outermost and innermost surfaces of the membrane were 36.81% and 5.45%, respectively. The membrane exhibited a tortuous structure with poor connection between the inner and outer pores. The aperture’s width in the inner surface ranged between 34 and 45 nm, which is 8.76–11.60 times larger than the estimated maximum diameter ofβ2-microglobulin (3.88 nm).Conclusion. The results suggest that the diameter size of inner pore apertures is not a limiting factor to middle molecules clearance, the extremely diminished density is. Increasing inner pore density and improving channel structure are strategies to improve clearance of middle molecules.

scholarly journals Morphological Characterization of Bacteria Using the Atmospheric Scanning Electron Microscope (ASEM)

2010 ◽  
Vol 16 (S2) ◽  
pp. 50-51
Author(s):  
K Teramoto ◽  
H Nishiyama ◽  
Y Maruyama ◽  
Y Konyuuba ◽  
Y Abe ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Morphological Characterization ◽  
Scanning Electron

Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.

scholarly journals Polyphyly and homoplasic structures in rhizosolenioid diatom genera: a review

2019 ◽  
Vol 152 (2) ◽  
pp. 142-149
Author(s):  
Richard W. Jordan ◽  
Matt P. Ashworth ◽  
Yuki Uezato ◽  
Schonna R. Manning
Keyword(s):  
Electron Microscope ◽  
Literature Review ◽  
Scanning Electron Microscope ◽  
Strong Support ◽  
Molecular Data ◽  
Literature Survey ◽  
Single Family ◽  
The Family ◽  
Family Level ◽  
Scanning Electron

Background and aims – Traditionally, extant rhizosolenioid diatom genera have been placed in a single family, the Rhizosoleniaceae. However, preliminary molecular data suggested that the family might be polyphyletic. Therefore, a literature review of the morphological, ultrastructural and molecular data of the rhizosolenioid genera was undertaken. Methods – In addition to the literature survey, the location of the rimoportula in a number of rhizosolenioid genera was investigated by breaking the valves and observing the fragments in the scanning electron microscope. Key results – The data provides strong support for the previous separation of Proboscia and Rhizosolenia at the family level (Probosciaceae vs. Rhizosoleniaceae), with the rimoportula being located at the tip of the proboscis in Proboscia, or with an internal labia at the base of the hollow tubular rimoportula (= spine or process) in Rhizosolenia and Pseudosolenia. Conclusions – The data suggests that a number of rhizosolenioid genera should be transferred to other families, and that gene sequences of two genera (Dactyliosolen and Neocalyptrella) are needed as their morphological features differ markedly from those of the Rhizosoleniceae s. str. (Rhizosolenia, Guinardia, Pseudosolenia).

scholarly journals Antibacterial Activity and Morphological Characterization of Synthesis Graphene Oxide Nanosheets by Simplified Hummer’s Method

2018 ◽  
Vol 15 (3) ◽  
pp. 627-633 ◽  
Author(s):  
Russel R. Ghanim ◽  
M. R. Mohammad ◽  
Adi M. Abdul Hussien
Keyword(s):  
Antibacterial Activity ◽  
Graphene Oxide ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Bacterial Species ◽  
Morphological Characterization ◽  
Diffusion Method ◽  
Gram Positive ◽  
Gram Positive Bacteria ◽  
Scanning Electron

Graphene oxide (GO) nanosheets were prepared by a novel simplified Hummer's method. The morphological and cross section images of GO have been tested with field emission-scanning electron microscope (FE-SEM). The antibacterial activity of GO nansheets against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were investigated as a model for Gram-negative bacteria and Gram-positive bacteria respectively. Bacteriological tests were performed by agar well diffusion assay with different concentrations of GO nanosheets and the bacterial morphological change of two bacterial species has been studied by scanning electron microscope (SEM) before and after treated with GO nanosheets. These sheets have been approved to be an effective bactericide. The antibacterial activity of the nanosheets dispersion was measured by agar well diffusion method. Scanning electron microscopy (SEM) was used to investigate the biocidal action of this nanoscale material. The nanosheets of GO have shown a high antibacterial activity against Gram-positive bacteria. The results of the present work offer a novel assay to prepare GO nanosheets were it could be used as novel antibacterial agent in future for different areas of biomedical and pharmaceutical sciences, like biosensing, antibiotics, imaging, and drug delivery.

scholarly journals A NOTE ON VACCINIUM BRASSII SLEUMER (ERICACEAE), RECORDING FILAMENTOUS WAX ON THE FLOWERS

2021 ◽  
Vol 78 ◽  
pp. 1-6
Author(s):  
G. Argent ◽  
F. Christie
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Molecular Data ◽  
Evolutionary Relationships ◽  
Routine Identification ◽  
Geographical Locations ◽  
Scanning Electron

Routine identification of historical Vaccinium specimens at E revealed scurfy deposits on a specimen identified as Vaccinium brassii Sleumer. On examination with a Scanning Electron Microscope (SEM), these scurfy deposits turned out to be filamentous wax remarkably similar to that observed in Vaccinium ceraceum Argent. The disparity of the geographical locations of these two species is noted, together with the lack of molecular data to give insights into the evolutionary relationships.

scholarly journals Morphological Characterization of Soot from the Atmospheric Combustion of Kerosene

2011 ◽  
Vol 8 (3) ◽  
pp. 1068-1073 ◽  
Author(s):  
Ezekiel Dixon Dikio
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Morphological Characterization ◽  
Catalyst Precursor ◽  
Carbon Nanomaterial ◽  
X Ray Diffraction ◽  
Carbon Nanospheres ◽  
X Ray ◽  
Scanning Electron

Kerosene has been used as a precursor for the production of carbon nanomaterial without a catalyst precursor. Nanomaterials formed in the process have been analysed by Raman, Scanning electron microscope (SEM), x-Ray diffraction (XRD) and by Energy dispersive spectroscopy (EDS). Carbon nanomaterial produced show the morphology of carbon nanospheres with diameters of about 0.3 µm.

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.

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