Morphological characterization of bioerodible polymers. 3. Characterization of the erosion and intact zones in polyanhydrides using scanning electron microscopy

1993 ◽  
Vol 26 (25) ◽  
pp. 6756-6765 ◽  
Author(s):  
Edith Mathiowitz ◽  
Jules Jacob ◽  
Kathleen Pekarek ◽  
Donald Chickering
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Morphological Characterization ◽  
Scanning Electron

scholarly journals Morphological characterization of domatium development in Callicarpa saccata

2019 ◽  
Vol 125 (3) ◽  
pp. 521-532
Author(s):  
Emma Sarath ◽  
Kazune Ezaki ◽  
Takenori Sasaki ◽  
Yu Maekawa ◽  
Yuji Sawada ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cell Proliferation ◽  
Morphological Characterization ◽  
Leaf Primordia ◽  
Normal Functioning ◽  
Simple Leaf ◽  
Mesophyll Tissue ◽  
Scanning Electron

Abstract Background and aims Domatia are plant structures within which organisms reside. Callicarpa saccata (Lamiaceae) is the sole myrmecophyte, or ‘ant plant’, that develops foliar (leaf-borne) myrmeco-domatia in this genus. In this work we examined domatium development in C. saccata to understand the developmental processes behind pouch-like domatia. Methods Scanning electron microscopy, sectioning and microcomputed tomography were carried out to compare the leaves of C. saccata with those of the closely related but domatia-less myrmecophyte Callicarpa subaequalis, both under cultivation without ants. Key results Callicarpa saccata domatia are formed as a result of excess cell proliferation at the blade/petiole junctions of leaf primordia. Blade/petiole junctions are important meristematic sites in simple leaf organogenesis. We also found that the mesophyll tissue of domatia does not clearly differentiate into palisade and spongy layers. Conclusions Rather than curling of the leaf margins, a perturbation of the normal functioning of the blade/petiole junction results in the formation of domatium tissue. Excess cell proliferation warps the shape of the blade and disturbs the development of the proximal–distal axis. This process leads to the generation of distinct structures that facilitate interaction between C. saccata and ants.

scholarly journals Morphological Characterization of Ordered Meso-Pores on a Mesoporous Silica by using High-Resolution Scanning Electron Microscopy

2011 ◽  
Vol 17 (S2) ◽  
pp. 1912-1913
Author(s):  
Y Ohrai ◽  
T Sunaoshi ◽  
H Ito ◽  
T Ogashiwa ◽  
N Ikawa ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
High Resolution ◽  
Mesoporous Silica ◽  
Morphological Characterization ◽  
Scanning Electron

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.

scholarly journals Chemical and morphological characterization of PM2.5 collected during MILAGRO campaign using scanning electron microscopy

2012 ◽  
Vol 3 (3) ◽  
pp. 289-300 ◽  
Author(s):  
Gladis Labrada-Delgado ◽  
Antonio Aragon-Pina ◽  
Arturo Campos-Ramos ◽  
Telma Castro-Romero ◽  
Omar Amador-Munoz ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Morphological Characterization ◽  
Scanning Electron

Low-Voltage Scanning Electron Microscopy Investigation of Polymers

1988 ◽  
Vol 46 ◽  
pp. 220-221
Author(s):  
V. K. Berry
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Low Voltage ◽  
Morphological Characterization ◽  
Transmission Electron ◽  
Conducting Materials ◽  
Voltage Scanning ◽  
Scanning Electron

The morphological characterization of any polymer blend plays an important part in the development of a new blend system because the properties of blends are dictated by phase morphology which is dependent upon the chemistry and the processing conditions. Light microscopy, scanning electron microscopy and transmission electron microscopy are the most commonly used microscopical techniques for morphological characterization. Transmission electron microscopy techniques provide the best resolution (≈ 0.3 nm) but are limited in the size of sample area and require elaborate sample preparation procedures. Surface charging and beam damage problems have been some of the drawbacks of conventional scanning electron microscopy with non-conducting materials like polymers.The use of low accelerating voltage scanning electron microscopy (LVSEM) in the characterization of polymers and other non-conducting materials is beginning to be recognized.

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