Comparative foregut functional morphology of three co-occurring mysids (Crustacea: Mysidacea) from south-eastern Tasmania

1994 ◽  
Vol 74 (2) ◽  
pp. 323-336 ◽  
Author(s):  
Ephrime B. Metillo ◽  
David A. Ritz
Keyword(s):  
Functional Morphology ◽  
Feeding Habits ◽  
Three Dimensional ◽  
Strong Relationship ◽  
Feeding Habit ◽  
Gut Contents ◽  
Depth Of Field ◽  
Internal Arrangement ◽  
Scanning Electron

Studies of mysid diets by gut contents analysis have generally revealed a broadly omnivorous feeding habit, but there are also tendencies towards carnivory, herbivory and/or detritivory (e.g. Nath & Pillai, 1973; Siegfried & Kopache, 1980; Mauchline, 1980; Zagursky & Feller, 1985; Wooldridge & Bailey, 1982; Webb & Wooldridge, 1989). Examination of feeding structures is also necessary to support inferences about feeding ecology (e.g. Webb & Wooldridge, 1989). However, there have been few studies relating to the functional morphology of mysid foreguts (Gelderd, 1909; Haffer, 1965; Nath & Pillai, 1973; Mauchline, 1980; Friesen et al., 1986; Webb & Wooldridge, 1989; Storch, 1989). With the exception of the latter two studies, qualitative descriptions and characterization of the different internal foregut structures have been primarily based on light microscopy. These studies may misinterpret the internal arrangement, topography, and three-dimensional orientation of the internal armature of the foregut, mainly due to problems with depth of field (Grice & Lawson, 1971). Oshel & Steele (1988), from SEM observations, briefly described some foregut features of Gnathophausia ingens. In a comparative study, Storch (1989), using the techniques of transmission and scanning electron microscopy, described in detail the different food chambers and channels, cuticular ridges, and ultrastructure of the epithelial and cuticular linings of the mysid foregut. Webb & Wooldridge (1989) noted the strong relationship between mouthparts, foregut morphology, and the feeding habits of two co-occurring mysids.

scholarly journals FIB-SEM Three-Dimensional Tomography for Characterization of Carbon-Based Materials

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Nan Nan ◽  
Jingxin Wang
Keyword(s):  
Focused Ion Beam ◽  
Ion Beam ◽  
Three Dimensional ◽  
3D Tomography ◽  
Tomography System ◽  
Internal Structures ◽  
Potential Applications ◽  
Scanning Electron ◽  
Carbon Based

A review on the recent advances of the three-dimensional (3D) characterization of carbon-based materials was conducted by focused ion beam-scanning electron microscope (FIB-SEM) tomography. Current studies and further potential applications of the FIB-SEM 3D tomography technique for carbon-based materials were discussed. The goal of this paper is to highlight the advances of FIB-SEM 3D reconstruction to reveal the high and accurate resolution of internal structures of carbon-based materials and provide suggestions for the adoption and improvement of the FIB-SEM tomography system for a broad carbon-based research to achieve the best examination performances and enhance the development of innovative carbon-based materials.

The study of proventricular micromorphological characterization of ten Grylloidea species (Orthoptera: Grylloidea) from China

Zootaxa ◽  
2011 ◽  
Vol 2906 (1) ◽  
pp. 52
Author(s):  
XIAOQIANG LI ◽  
BINGZHONG REN ◽  
YUTING ZOU ◽  
JIAN ZHANG ◽  
YINLIANG WANG
Keyword(s):  
Electron Microscopy ◽  
Clustering Analysis ◽  
Feeding Habits ◽  
Critical Value ◽  
Morphological Characterization ◽  
Species Relationships ◽  
Future Studies ◽  
Selection Of ◽  
Scanning Electron

The present study compares the proventricular morphology, analyzed under optic microscope and scanning electron microscopy (SEM), among ten Grylloidea species. The result showed that the size of proventriculus was of critical value. Internally, the main differences were the number of sclerotized appendix (sa), middle denticles (md) and lateral denticles (ld), and the structure of lateral teeth (lt). In addition, we analyzed the crickets’ feeding habits and note that the the proventriculus possesses highly sclerotized projections which act in the selection of victuals. The morphology of proventriculus is closely related to feeding habits. A clustering analysis of seven features of the proventriculus was constructed. It revealed that the proventriculus had significance for taxonomy and species relationships. Observations on morphological characterization of proventricular morphology will be useful in future studies of the feeding habits and phylogeny of crickets.

Whither Scanning Electron Microscopy

1969 ◽  
Vol 27 ◽  
pp. 4-5
Author(s):  
T. E. Everhart
Keyword(s):  
Three Dimensional ◽  
Great Depth ◽  
Depth Of Field ◽  
Minimal Sample ◽  
Transmission Electron ◽  
Electron Microscopes ◽  
Dimensional Object ◽  
Scanning Electron Microscopes ◽  
Short Time ◽  
Scanning Electron

Although scanning electron microscopes have been available commercially for a relatively short time, their use is increasing rapidly. Countless persons have marvelled at their great depth of field, which produces an easily interpreted image of a three-dimensional object. Trained electron-microscopists have been impressed by the minimal sample preparation required for scanning microscope observation of inorganic objects, and of some organic objects. Non-specialists find the instrument easy to use, because many of the controls are related to familiar controls on television sets, on cathode-ray oscilloscopes, etc., and because the image on the cathode-ray tube screen is easy to interpret. Now seems the opportune moment to re-emphasize how the scanning electron microscope (SEM) differs fundamentally from the transmission electron (TEM), in order to insure that constraints imposed by the physics of image formation in the TEM will not be taken subconsciously as constraints in the SEM too.

Three Dimensional Characterization of Interfaces in Semiconductors by Scanning Electron Microscopy

1986 ◽  
Vol 69 ◽  
Author(s):  
David C. Joy ◽  
D. M. Maher ◽  
R C Farrow
Keyword(s):  
Electron Microscopy ◽  
Three Dimensional ◽  
Preparation Time ◽  
Cross Sectional ◽  
Transmission Electron ◽  
Alternative Approach ◽  
Imaging Mode ◽  
Structural Characterizations ◽  
Scanning Electron

AbstractIn many semiconductor materials problems, structural characterizations must be achieved in both the lateral and vertical dimensions. Although a combination of cross-sectional and planar transmission electron microscopy can provide this information, the sample preparation time is demanding and only relatively small volumes of material are examined. We describe here an alternative approach in which the charge collection (‘CCM’) imaging mode of the scanning electron microscope (SEM) is used. It is shown that, by varying the incident electron beam energy, electricallly active defects at different positions beneath the entrance surface of the material can be imaged and their depth estimated.

Preparation and Characterization of Three Dimensional Sn-Co Alloy Based on Porous Ni for Lithium-Ion Batteries

2011 ◽  
Vol 399-401 ◽  
pp. 1457-1460
Author(s):  
Li Xia Xu ◽  
Shi Chao Zhang ◽  
Wen Bo Liu
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Pulse Current ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Ni Substrate ◽  
Pulse Current Electrodeposition ◽  
Scanning Electron

A three-dimensional dendritic Sn-Co anode was prepared on the porous Ni substrate via pulse current electrodeposition methond, and characterized by means of scanning electron microscope (SEM), energy dispersive (EDX) analyzer. Then its electrochemical property were studied by means of charging-discharging (C-D) test. The influences of the current density and eletrochemical technique has been studied. Besides this, the importance of annealing for the cycling performance of the as-prepared electrode had been dicussed.

Three-Dimensional Characterization of Pigment Dispersion in Dried Paint Films Using Focused Ion Beam–Scanning Electron Microscopy

2012 ◽  
Vol 18 (2) ◽  
pp. 266-271 ◽  
Author(s):  
Jui-Ching Lin ◽  
William Heeschen ◽  
John Reffner ◽  
John Hook
Keyword(s):  
Image Analysis ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Three Dimensional ◽  
Pigment Dispersion ◽  
Beam Scanning ◽  
Quantitative Characterization ◽  
Paint Films ◽  
Scanning Electron

AbstractThe combination of integrated focused ion beam–scanning electron microscope (FIB-SEM) serial sectioning and imaging techniques with image analysis provided quantitative characterization of three-dimensional (3D) pigment dispersion in dried paint films. The focused ion beam in a FIB-SEM dual beam system enables great control in slicing paints, and the sectioning process can be synchronized with SEM imaging providing high quality serial cross-section images for 3D reconstruction. Application of Euclidean distance map and ultimate eroded points image analysis methods can provide quantitative characterization of 3D particle distribution. It is concluded that 3D measurement of binder distribution in paints is effective to characterize the order of pigment dispersion in dried paint films.

scholarly journals Three-Dimensional Characterization of Hardened Paste of Hydrated Tricalcium Silicate by Serial Block-Face Scanning Electron Microscopy

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1882 ◽  
Author(s):  
Yongjuan Zhao ◽  
Xianping Liu ◽  
Bo Chen ◽  
Fei Yang ◽  
Yongming Zhang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Three Dimensional ◽  
Tricalcium Silicate ◽  
Product Model ◽  
Outer Product ◽  
Face Scanning ◽  
Block Face ◽  
Scanning Electron

With the application of a three-dimensional (3D) characterization technique, serial block-face scanning electron microscopy (SBFSEM), the 3D microstructure of a hydrated cement monomineral, tricalcium silicate (C3S), was measured with nanoscale resolution. The 3D morphologies of anhydrous particles, hydrated products, and capillary pores were visualized. Closed and open pores were discovered inside an anhydrous particle. The size and distribution of both the anhydrous C3S particles and their capillary pores were analyzed quantitatively and the porosity was determined to be 9%. The distribution of pores was found to be in a good agreement with the inner and outer product model of Hu et. al., with an inner shell distance of 860 nm. Considering the spatial resolution of the instrument and the volume of sample measured, most pores in this experiment could be characterized as capillary pores.

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