Morphology of the elongate sensillum placodeum on the antennae of Aphidius smithi (Hymenoptera: Aphidiidae)

1978 ◽  
Vol 56 (4) ◽  
pp. 519-525 ◽  
Author(s):  
J. H. Borden ◽  
A. Rose ◽  
R. J. Chorney
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Host Finding ◽  
Dendritic Branch ◽  
Tormogen Cell ◽  
Dendritic Branches ◽  
Relationship Of ◽  
The Relationship ◽  
Cuticular Surface ◽  
Scanning Electron

Elongate placoid sensilla were present on all 20 flagellar segments in five male Aphidius smithi and all but the basal 1 of 17 segments in five females. They are oriented longitudinally, approximately equidistant around the circumference of a segment. Scanning electron microscopy of the internal cuticular surface disclosed lamellae which divide the sensillum into lateral and median channels. Many transverse ridges are present in the ceiling of the median channel. Unlike other species, there is no cuticular floor of the sensillum. Numerous nerve cell bodies in the subcuticular tissue give rise to dendritic processes, a ciliary region, and a region of dendritic branches which lie parallel to each other within the 1-μm-wide median channel underneath the 0.1- to 0.25-μm-thick dome. Each dendritic branch is composed of a neurotubule surrounded by a plasma membrane. The ascending dendrites are flanked by the microvilli of the trichogen cell. A tormogen cell encloses the trichogen cell and extends into the lateral channels of the sensillum. The relationship of minute pores in the dome with the underlying dendritic branches is unclear. The hypothesis is advanced that the sensilla may be involved in host finding through perception of infrared radiation.

scholarly journals Contribución al estudio morfológico y anatómico en miculas de Mentha L. y Preslia Opiz (Latniacecte) de lo Península Ibérica.

2003 ◽  
Vol 28 ◽  
pp. 59-71 ◽  
Author(s):  
Mª Ángeles Martín Mosquero ◽  
Julio Pastor ◽  
Rocío Juan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Anatomical Study ◽  
Point Of View ◽  
Anatomical Studies ◽  
Pericarp Thickness ◽  
Relationship Of ◽  
The Relationship ◽  
Península Ibérica ◽  
Scanning Electron

RESUMEN. Contribución al estudio morfológico y anatómico en miculas de Mentha L. y Preslia Opiz (Latniacecte) de lo Península Ibérica. Se estudia la micromorfología y anatomía de núculas de tres especies de Mentha (M. aquatica L, M. suaveolens Ehrh., M. pulegium L.) y de Preslia cervina (L.) Fresen, tanto al microscopio óptico (M.O.) como al microscopio electrónico de barrido (M.E.B.). Desde un punto de vista morfológico, la diferencia principal entre ambos géneros ha sido la ornamentación de las núculas, siendo más o menos reticulada en Mentha y rugosa en Preslia. Anatómicamente, hay que destacar cl grosor del pericarpo, que es bastante menor en Preslia. No obstante, el conjunto de caracteres estudiados pone de manifiesto la afinidad de estos géneros. Por último, se comenta brevemente los sistemas de dispersión más frecuentes en estos géneros.Palabras clave. Núcula, morfología, anatomía, mucílago, Mentha, Preslia, Lamiaceae, Península Ibérica.ABSTRACT. Contribution to morphological and anatomical studies on nut/es of Mentha L. and Preslia Opiz (Lamiaceae) from the Iberia'? Peninsula. A morphological and anatomical study on nutlets of three species of Mentha (M. aquatica L, M. suaveolens Ehrh., M. pulegium L.) and Preslia cervina (L.) Fresen, was carried out using light and scanning electron microscopy. From a morphological point of view the main difference between both genera has been the nutlets' ornamentation, being more or less reticulate in Mentha and rugose in Preslia. Anatomically, the pericarp thickness stands out, which is fairly thinner in Preslia. However, whole characters studied point out the relationship of these genera. Lastly, the usual dispersal systems between these genera are discussed briefly.Key words. Nutlet, morphology, anatomy, mucilage, Mentha, Preslia, Lamiaceae, Iberian Peninsula.

X-RAY Microanalysis of Selected Coelenterate Statoliths

1985 ◽  
Vol 65 (3) ◽  
pp. 617-627 ◽  
Author(s):  
David M. Chapman
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Atomic Number ◽  
Elemental Analysis ◽  
Energy Dispersive Spectrometer ◽  
X Ray ◽  
Relationship Of ◽  
Micro Analysis ◽  
The Relationship ◽  
Scanning Electron

When scanning electron microscopy became integrated with X-ray micro-analysis, it became an easy matter to localize an object and perform a semi-quantitative elemental analysis of atoms of atomic number 11 or higher using an energy dispersive spectrometer. This technique is used in the present study to determine the chemistry of the statoliths of eight hydromedusae, two scyphomedusae, one cubozoan and a ctenophore with respect to their comparative biomineralization and the relationship of the mineral to their taxonomy.

Eocronartium muscicola: a basidiomycetous moss parasite exploiting gametophytic transfer cells

1988 ◽  
Vol 66 (4) ◽  
pp. 762-770 ◽  
Author(s):  
E. W. A. Boehm ◽  
D. J. McLaughlin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Transfer Cells ◽  
Transmission Electron ◽  
Host Parasite ◽  
Relationship Of ◽  
The Relationship ◽  
Gain Access ◽  
Scanning Electron

The host–parasite interface in Eocronartium muscicola, Auriculariales sensu lato, was examined histologically for 6 of the 21 reported moss hosts, using light microscopy, scanning electron microscopy, and transmission electron microscopy. A unique mode of fungal biotrophy was encountered in 5 of the 6 mosses analyzed, in which E. muscicola exploits gametophytic host transfer cells concomitant with varying degrees of supplantation of the moss sporophyte. Basidiocarps are restricted in these mosses to postfertilized archegonia, in which they are seen to associate with the sporophyte foot region, where they gain access to the host transfer cell nutritional interface. Basidiocarp ontogeny is presented as it relates to the development of the host–parasite interface. The relationship of E. muscicola to other simple-septate auricularioid taxa and the the Uredinales is discussed.

scholarly journals Three-dimensional relationships between tumor cells and microcirculation with double cyanine immunolabeling, laser scanning confocal microscopy, and computer-assisted reconstruction: an alternative to cast corrosion preparations.

1994 ◽  
Vol 42 (5) ◽  
pp. 681-686 ◽  
Author(s):  
V Rummelt ◽  
L M Gardner ◽  
R Folberg ◽  
S Beck ◽  
B Knosp ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Blood Vessels ◽  
Tumor Cells ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Melanoma Cells ◽  
Tumor Blood Vessels ◽  
The Relationship ◽  
Scanning Electron

The morphology of the microcirculation of uveal melanomas is a reliable market of tumor progression. Scanning electron microscopy of cast corrosion preparations can generate three-dimensional views of these vascular patterns, but this technique sacrifices the tumor parenchyma. Formalin-fixed wet tissue sections 100-150 microns thick from uveal melanomas were stained with the lectin Ulex europaeus agglutinin I (UEAI) and proliferating cell nuclear antigen (PCNA) to demonstrate simultaneously the tumor blood vessels and proliferating tumor cells. Indocarbocyanine (Cy3) was used as a fluorophore for UEAI and indodicarbocyanine (Cy5) was used for PCNA. Double labeled sections were examined with a laser scanning confocal microscope. Images of both stains were digitized at the same 5-microns intervals and each of the two images per interval was combined digitally to form one image. These combined images were visualized through voxel processing to study the relationship between melanoma cells expressing PCNA and various microcirculatory patterns. This technique produces images comparable to scanning electron microscopy of cast corrosion preparations while permitting simultaneous localization of melanoma cells expressing PCNA. The microcirculatory tree can be viewed from any perspective and the relationship between tumor cells and the tumor blood vessels can be studied concurrently in three dimensions. This technique is an alternative to cast corrosion preparations.

scholarly journals Microstructure–Property Relationship of Polyurethane Foams Modified with Baltic Sea Biomass: Microcomputed Tomography vs. Scanning Electron Microscopy

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5734
Author(s):  
Paulina Kosmela ◽  
Jan Suchorzewski ◽  
Krzysztof Formela ◽  
Paweł Kazimierski ◽  
Józef Tadeusz Haponiuk ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Baltic Sea ◽  
Thermal Insulation ◽  
Reference Sample ◽  
Microcomputed Tomography ◽  
Polyurethane Foams ◽  
Relationship Of ◽  
The Impact ◽  
Scanning Electron

In this paper, novel rigid polyurethane foams modified with Baltic Sea biomass were compared with traditional petro-based polyurethane foam as reference sample. A special attention was focused on complex studies of microstructure, which was visualized and measured in 3D with high-resolution microcomputed tomography (microCT) and, as commonly applied for this purpose, scanning electron microscopy (SEM). The impact of pore volume, area, shape and orientation on appearance density and thermal insulation properties of polyurethane foams was determined. The results presented in the paper confirm that microcomputed tomography is a useful tool for relatively quick estimation of polyurethane foams’ microstructure, what is crucial especially in the case of thermal insulation materials.

Research Based on Scanning Electron Microscopy to Determine Original Water-Cement Ratio of Hardened Concrete

2014 ◽  
Vol 936 ◽  
pp. 1485-1489 ◽  
Author(s):  
Yue Li ◽  
Huan Tong ◽  
Jin Bo Yang ◽  
Wan Guo Dong
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Experimental Results ◽  
Hardened Concrete ◽  
Capillary Porosity ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
The Relationship ◽  
Original Water ◽  
Scanning Electron

In order to detect the influence of age on the experiment that use scanning electron microscopy (SEM) to determinate the original water-cement ratio (w/c) of hardened concrete, a series of concrete mixes are tested. Experimental results show that early ages do have an effect on the water-cement ratio of hardened concrete that determined from scanning electron microscopy, this effect will decrease while age increases. The relationship between capillary porosity, w/c and age is analyzed and a calculation equation is given.

Elemental Analysis of Alkalis and Dental Deposits Associated with Coca Chewing in Ecuador

2006 ◽  
Vol 17 (1) ◽  
pp. 77-89 ◽  
Author(s):  
Douglas H. Ubelaker ◽  
Karen E. Stothert
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Spectral Analysis ◽  
North America ◽  
Elemental Analysis ◽  
X Ray ◽  
Tooth Structure ◽  
Elemental Analyses ◽  
The Relationship ◽  
Scanning Electron

AbstractThe relationship between Andean coca use and dental deposits is explored through the use of scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS). Elemental analyses of samples of large dental deposits from archeologically recovered skeletons from Ecuador dating between 500 B.C. and A.D. 1532 are compared with those of normal calculus deposits of individuals from North America (modern and precontact), of normal tooth structure and of samples of alkali recovered from Ecuadorian artifacts thought to have been employed in coca use. Spectral analysis revealed homogeneity among all dental samples (deposits and structure) and that they are distinct from the elemental pattern revealed in the analysis of the artifact alkalis.

Polarization of Ti6Al4V alloy in NaBr electrolyte and surface fractal analysis

2016 ◽  
Vol 232 (7) ◽  
pp. 602-609
Author(s):  
Yafeng He ◽  
Wenzhuang Lu ◽  
Weiming Gan ◽  
Jianshe Zhao ◽  
Dunwen Zuo
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Titanium Alloy ◽  
Electrochemical Machining ◽  
Test System ◽  
Surface Topology ◽  
Electrochemical Test ◽  
Polarization Characteristics ◽  
The Relationship ◽  
Scanning Electron

Electrochemical machining is a promising method for titanium alloy processing. The polarization characteristics of Ti6Al4V were studied in detail in order to provide a deeper understanding of this method. The polarization curve of the alloy, which shows the relationship between current density and potential under an external electric field, was obtained in NaBr electrolyte at three different concentrations in a three-electrode electrochemical test system. The surface topography of the polarization zone and pits was examined by scanning electron microscopy, and their fractal features were calculated by the picture point cover method. The results show that Ti6Al4V in the more concentrated electrolyte has higher dissolution rate, lower decomposition potential, and more uniform surface topology in the polarization areas.

Scanning electron microscopy of adult Echinoparyphium recurvatum (Von Linstow, 1873) (Digenea: Echinostomatidae) from Britain

2011 ◽  
Vol 85 (4) ◽  
pp. 453-457 ◽  
Author(s):  
A.M. McCarthy
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sensu Stricto ◽  
The Body ◽  
Korean Isolate ◽  
Asian Origin ◽  
Spine Shape ◽  
Old Adult ◽  
The Relationship ◽  
Scanning Electron

AbstractThe surface topography of 15-day-old adult Echinoparyphium recurvatum (Von Linstow, 1873) sensu stricto, from an isolate of the parasite utilizing Lymnaea peregra as first intermediate host in southern England, is described and illustrated using scanning electron microscopy, and is compared to those of other Echinoparyphium species from Europe, and with those of E. recurvatum of East Asian origin. The general morphology of tegumental features was found to be very similar to that of worms of the same age observed in a previous study on a Korean isolate of E. recurvatum. Comparison of collar and body spination of E. recurvatum with other 45-collar-spined members of the genus in Europe revealed some significant differences in morphology. Collar spines of E. recurvatum were found to be shorter and more pointed than those of Echinoparyphium mordwilkoi. The body spines of E. recurvatum are rounded and scale-like, extending just beyond the ventral sucker, contrasting with the pointed, thorn-shaped body spines of E. mordwilkoi, extending posteriorly to the level of the second testis. Body spine shape and distribution in E. recurvatum were found to be more similar to those of Echinoparyphium pseudorecurvatum. The value of SEM studies in elucidating the relationship between members of the genus Echinoparyphium in Britain/Europe and those in Africa, Asia and North America is suggested.

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