Implications of epidermal studies in identification of two medicinally important species of Rauvolfia L.

2018 ◽  
Vol 25 (4) ◽  
pp. 235-241
Author(s):  
Vineet Singh ◽  
◽  
Nitisha Srivastava ◽  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Seed Morphology ◽  
Correct Identification ◽  
Plant Systematics ◽  
Important Species ◽  
Crude Drugs ◽  
Scanning Electron ◽  
Sem Studies

Leaf epidermal studies, pollen and seed morphology of two species of Rauvolfia i.e. R. serpentina and R. tetraphylla were studied using compound and SEM (Scanning Electron Microscope) to facilitate the correct identification and authentication of these significant crude drugs and also as an aid to plant systematics. The microscopic and SEM studies of these species showed significant differences in the morphology of the analyzed parts.

Preparation of Alcohol-Preserved Larvae of Culicidae (Diptera) for Scanning Electron Microscopy

1972 ◽  
Vol 3 (3) ◽  
pp. 181-188 ◽  
Author(s):  
Christine Dahl
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
The Body ◽  
Taxonomic Studies ◽  
Scanning Electron ◽  
Sem Studies

AbstractA method for preparation of alcohol-preserved culicid larvae for Scanning Electron Microscope (SEM) studies is described. It is based on dehydration by ethanol-xylol and fast evaporation of xylol in +8o° C. for ten minutes. For taxonomic studies such as examination of pecten teeth, comb scales and microtrichiae in magnifications up to 6oooX the method is suitable. For studies of receptor structures on hair-tufts and microstructures of the body integument alcohol preserved material is less satisfactory. The microstructure of the comb scales is figured and their function discussed. Differences in the ultrastructure of the abdominal hair-tufts are pointed out.

scholarly journals Seed micromorphological study on endemic and subendemic species of Veronica L. (Plantaginaceae Juss.) in Iran

2019 ◽  
Vol 26 (2) ◽  
pp. 315-324
Author(s):  
Soghra Ramzi ◽  
Shahryar Saedi-Mehrvarz
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Seed Coat ◽  
Seed Morphology ◽  
Seed Shape ◽  
Sem Micrographs ◽  
Qualitative And Quantitative ◽  
Quantitative Characters ◽  
Micromorphological Characters ◽  
Scanning Electron

Seed morphology of 12 Iranian endemic and subendemic species of Veronica was studied using scanning electron microscope (SEM). Seven qualitative and quantitative characters were measured using SEM micrographs and stereomicroscopy. The seed shape of most species is ovate and plano-convex. The size of seeds ranges from 1.25 x 0.75 mm in V. khorassanica to 2.5 x 1.75 mm in V. viscosa Boiss. The ornamentation of seed coat is reticulate-verrucate in V. khorassanica, V. czerniakowskiana, V. mazanderanae and V. rubrifolia, reticulate-rugate in V. acrotheca, V. aucheri, V. viscosa and V. intercedens, rugose in V. microcarpa, V. chionantha and V. rechingeri, and reticulate-porate in V. gaubae. The testa cells are polygonal in ten species and irregular in two species. Micromorphological characters of seeds are useful in specific and subspecific delimitations of Iranian Veronica.

SEM and stereoscope microscope observations on the seeds of some Ornithogalum (Hyacinthaceae) species

Biologia ◽  
2008 ◽  
Vol 63 (5) ◽  
Author(s):  
Leszek Bednorz ◽  
Aneta Czarna
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Morphological Characters ◽  
Seed Morphology ◽  
Similar Species ◽  
Specific Level ◽  
Seed Surface ◽  
Taxonomic Criterion ◽  
Micromorphological Characters ◽  
Scanning Electron

AbstractThe paper presents the results of the study on seed morphology of four following Ornithogalum species: O. boucheanum Asch., O. nutans L., O. pyrenaicum L., and O. umbellatum L. Several macro-and micro-morphological characters were observed using stereoscope and scanning electron microscope. Differences were found especially in micromorphological characters of the seed surface, the shape of raphe and micropylar pole. These characters can be used as an additional taxonomic criterion at specific level for this genus. Only the seeds of O. boucheanum and O. nutans — two closely related and morphologically very similar species are practically undistinguished.

The occurrence and morphology of Caudospora spp. (Protozoa: Microsporida) in Newfoundland and Labrador blackfly larvae (Diptera: Simuliidae)

1972 ◽  
Vol 50 (11) ◽  
pp. 1363-1366 ◽  
Author(s):  
Stanley Frost ◽  
Richard A. Nolan
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Newfoundland And Labrador ◽  
Light Microscope ◽  
Spore Form ◽  
Blackfly Larvae ◽  
First Time ◽  
Scanning Electron ◽  
Sem Studies

Caudospora simulii is widespread in the Province of Newfoundland and Labrador and occurs in two species of Prosimulium. Caudospora brevicauda is recorded from the Island of Newfoundland and from Canada for the first time. The occurrence of a new spore form from Cnephia mutata is recorded from Labrador. Scanning electron microscope (SEM) studies were carried out with all three spore forms. The usefulness of SEM observations as a supplement to light microscope studies with microsporida is discussed.

Scanning electron microscope (SEM) studies on the epiblast of young chick embryos

1974 ◽  
Vol 143 (2) ◽  
pp. 205-214 ◽  
Author(s):  
H. J. Jacob ◽  
B. Christ ◽  
M. Jacob ◽  
G. J. Bijvank
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Chick Embryos ◽  
Young Chick ◽  
Scanning Electron ◽  
Sem Studies

Polyethylene Oxide Nanofibers as Ultraviolet Sensors

2006 ◽  
Vol 948 ◽  
Author(s):  
Saima Naz Khan ◽  
Jeffrey J. Rack ◽  
Aaron R. Rachford ◽  
Martin E. Kordesch
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Ultraviolet Light ◽  
Polyethylene Oxide ◽  
Light Wavelength ◽  
Electrospinning Technique ◽  
Pale Yellow ◽  
Cast Films ◽  
Scanning Electron ◽  
Sem Studies

ABSTRACTUsing the electrospinning technique, we have prepared [Ru (pic) 2 (dmso) 2] doped-polyethylene oxide nanofibers for ultraviolet sensing. The diameter of the as-prepared fibers is in the range of 1μm-100nm. These fibers change color from pale yellow to orange when exposed to ultraviolet light (wavelength∼350nm) and return to their original color after approximately 2-3 days. The intensity of the color increases with an increased time of exposure to UV. The color changing behavior in the nanofibrous mat is almost the same as that in cast films prepared from the same solutions. The scanning electron microscope (SEM) studies of the fibers show that the morphology of the fibers remains unchanged after exposure to UV.

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.

The Broad Applications of the Scanning Electron Microscope

1969 ◽  
Vol 27 ◽  
pp. 20-21
Author(s):  
C. T. Nightingale ◽  
S. E. Summers ◽  
T. P. Turnbull
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscopy ◽  
Surface Topography ◽  
Great Depth ◽  
Resolving Power ◽  
Depth Of Field ◽  
Pictorial Representations ◽  
Scanning Electron

The ease of operation of the scanning electron microscope has insured its wide application in medicine and industry. The micrographs are pictorial representations of surface topography obtained directly from the specimen. The need to replicate is eliminated. The great depth of field and the high resolving power provide far more information than light microscopy.

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