scholarly journals Micromorphology of Glandular hairs, Biological Activity and Composition of the Essential Oil of Tanacetum fisherae (Asteraceae-Anthemideae) from Iran

2011 ◽  
Vol 6 (2) ◽  
pp. 1934578X1100600 ◽  
Author(s):  
Peyman Rajaei ◽  
Taher Nejadsattari ◽  
Ali Asghar Maassoumi ◽  
Valiollah Mozaffarian ◽  
Ali Sonboli
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Biological Activity ◽  
Essential Oil ◽  
New Record ◽  
Antimicrobial Property ◽  
Microbial Strains ◽  
Total Oil ◽  
Main Component ◽  
Scanning Electron

The essential oil was obtained from the aerial flowering parts of Tanacetum fisherae, a new record from Iran, by hydrodistillation and analyzed by GC and GC-MS. Eleven components representing 99.9% of the total oil were identified. 1,8-Cineole (79.9%) was characterized as the principal compound. The essential oil and its main component were tested against nine microbial strains. The result of the bioassays revealed that the oil possess potent antimicrobial property. This may be associated due to the presence of 1,8-cineole in the oil which tested individually and its high activity was observed. Micromorphological studies of hairs by scanning electron microscopy (SEM) exhibited the presence of abundant sessile capitate glandular and medifixed T-shaped eglandular trichomes on the leaves, flowers and achene, giving useful diagnostic characters for identification of this medicinal plant.

Development of Alginate Based Active Films Containing Turmeric Essential Oil

2020 ◽  
Vol 861 ◽  
pp. 378-382
Author(s):  
Sophoan Phal ◽  
Muhammad Rafiullah Khan ◽  
Pattarin Leelaphiwat ◽  
Vanee Chonhenchob
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Water Vapor ◽  
Essential Oil ◽  
Sem Analysis ◽  
Film Properties ◽  
Elongation At Break ◽  
Control Film ◽  
Scanning Electron

Sodium alginate based films containing turmeric oil (TEO) at different concentrations (1, 2 and 3%) were developed. The film with no TEO was used as control. Incorporation of TEO had the effects on the film properties. With increasing TEO concentrations, thickness, elongation at break, permeability of oxygen and water vapor of the films significantly (p ≤ 0.05) increased. Whereas moisture content, tensile strength and modulus of elasticity significantly (p ≤ 0.05) decreased. Scanning electron microscopy (SEM) analysis showed more numerous pores and rougher surface of the antifungal films than the control film.

scholarly journals On cestode and digenean parasites of Clarias gariepinus (Burchell, 1822) from the Rietvlei Dam, South Africa

2006 ◽  
Vol 73 (2) ◽  
Author(s):  
M. Barson ◽  
A. Avenant-Oldewage
Keyword(s):  
Electron Microscopy ◽  
South Africa ◽  
Scanning Electron Microscopy ◽  
New Record ◽  
Histological Analysis ◽  
Clarias Gariepinus ◽  
Host Fish ◽  
Mean Intensity ◽  
Anterior Intestine ◽  
Scanning Electron

Sharptooth catfish, Clarias gariepinus, from the Rietvlei Dam near Pretoria, South Africa were examined for internal platyhelminth parasites. Two adult cestodes, Polyonchobothrium clarias (stomach) (prev alence 71 %, mean intensity = 5, n = 7) and Proteocephalus glanduliger (anterior intestine) (prevalence 14 %, mean intensity = 2, n = 7), were found in the gut while metacercariae of one larval digenean, Ornithodiplostomum sp. (prevalence 14 %, mean intensity = 140, n = 7), were found encysted in the muscles. The morphology of these species, based on light and scanning electron microscopy as well as histological analysis, and how they differ from previously described specimens, are discussed. Ornithodiplostomum is a new record in southern Africa. Infection levels of the host fish were mild compared to records from previous surveys.

scholarly journals Micromorphology of Rosa rugosa Thunb. petal epidermis secreting fragrant substances

2012 ◽  
Vol 65 (4) ◽  
pp. 21-28 ◽  
Author(s):  
Aneta Sulborska ◽  
Elżbieta Weryszko-Chmielewska ◽  
Mirosława Chwil
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Essential Oil ◽  
Epidermal Cells ◽  
Rosa Rugosa ◽  
Abaxial Epidermis ◽  
Scanning Electron

The intensely fragrant flowers of the <em>Rosa rugosa </em>Thunb. have been applied in medicine, and food and cosmetic industries. The species is cultivated for production of rose essential oil (<em>Oleum Rosae</em>) from its flowers. <em>R. rugosa </em>petals secrete the largest quantities of essential oil. <br />The aim of the study was to identify the characteristics of the epidermis of both sides of the petal and to observe whether adaxial and abaxial epidermal cells can secrete essential oil. The investigations were conducted using light and scanning electron microscopy. The analyses were focused on petal thickness and characteristics of the mesophyll. The study has demon- strated that only adaxial epidermal cells form conical papillae covered by massive cuticular striae. The surface of the papillae displayed remnants of a secretory substance. In turn, the inner walls of the abaxial epidermal cells were flat and covered by a striated cuticle, which exhibited various striation patterns. Frarant substances stored under the cuticle caused local stretching thereof and disappearance of striation. The results of our observations allow a statement that the cells of the adaxial and abaxial epidermis of <em>R. rugosa </em>petals differ in terms of the structure and they secrete fragrant substances.

scholarly journals THE ULTRASTRUCTURE OF BIODEGRADABLE IMPLANTS: CHANGES DURING THE TIME

2015 ◽  
Vol 6 (1) ◽  
pp. 17-24
Author(s):  
A A Akhpashev ◽  
E A Dzhambinova ◽  
A S Kanaev ◽  
D S Agzamov
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Biological Activity ◽  
Human Body ◽  
Biodegradable Implants ◽  
Biochemical Processes ◽  
Objective Evidence ◽  
Over Time ◽  
Scanning Electron

The authors describe in detail the biochemical processes that occur over time and with the collapse of the polymer in the bone. Originally used scanning electron microscopy to assess the condition of clamps, which spent several years in the bone. The data obtained is objective evidence that the biological activity of the implant in the bone and again emphasize the importance of the choice of materials to be implanted in the human body.

scholarly journals The first record of the genus Odiellus (Opiliones, Phalangiidae) in Turkey with some SEM studies on its morphology

2011 ◽  
Vol 63 (4) ◽  
pp. 1265-1271
Author(s):  
K. Kurt ◽  
Köksal Erman
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Record ◽  
First Record ◽  
Characteristic Features ◽  
Scanning Electron ◽  
Sem Studies

The harvestmen species Odiellus lendli (Soerensen, 1894), with its genus Odiellus Roewer, 1923, was found in Anatolia. It represents a new record of Turkish harvestmen fauna. The characteristic features of this species are described and illustrated. Scanning electron microscopy (SEM) studies on the dorsal integument, ventral habitus, chelicerae, pedipalpus, trident, the ocularium and legs of female specimens are also presented. Localities of the collecting sites are photographed and plotted on a map.

scholarly journals Fungicides Films of Low-Density Polyethylene (LDPE)/Inclusion Complexes (Carvacrol and Cinnamaldehyde) Against Botrytis Cinerea

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 795 ◽  
Author(s):  
Daniel Canales ◽  
Lissette Montoille ◽  
Lina M. Rivas ◽  
J. Andrés Ortiz ◽  
Mauricio Yañez-S ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Essential Oil ◽  
Inclusion Complexes ◽  
Polymer Matrix ◽  
Active Agent ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Active Compounds ◽  
Scanning Electron

Low density polyethylene (LDPE) films were prepared with the incorporation of natural agents (carvacrol and trans-cinnamaldehyde) by the melting process. The co-precipitation method was used successfully to complex the carvacrol or trans-cinnamaldehyde with β-cyclodextrin (β-CD). The active compounds encapsulated in β-CD achieved ca. 90% encapsulation efficiency (E.E.). The inclusion complex studied by scanning electron microscopy (SEM) found particles of different sizes, ca. 4 μm. The active compounds were added directly (1 and 5 wt %) into the polymer matrix, yielding LDPE + carvacrol and LDPE + cinnamaldehyde films. The active compounds encapsulated in β-cyclodextrin (β-CD) were added to LDPE, yielding LDPE + β-CD-carvacrol and LDPE + β-CD-cinnamaldehyde films. The incorporation of carvacrol and trans-cinnamaldehyde, and their corresponding inclusion complexes with β-cyclodextrin, did not affect the thermal properties of LDPE. The microcapsules distributed in all polymer matrices had sizes of 5–20 μm as shown by scanning electron microscopy (SEM). In terms of mechanical properties, the polymers showed a slight decrease of Young’s modulus (12%) and yield stress compared (14%) to neat LDPE. This could be due to the essential oil acting as a plasticizer in the polymer matrix. The LDPE + carvacrol and LDPE + cinnamaldehyde films had the capacity to inhibit fungi by 99% compared to neat LDPE. The effectiveness against fungi of LDPE+β-CD + active agent was slower than by the direct incorporation of the essential oil in the LDPE in the same amount of active agent. The biocidal properties were related to the gradual release of active compound from the polymer. The results confirm the applicability of carvacrol, trans-cinnamaldehyde, and their corresponding inclusion complexes in active packaging, as well as their use in the food delivery industry.

scholarly journals Behningiidae and Potamanthidae (Insecta, Ephemeroptera) in Thailand

ZooKeys ◽  
2021 ◽  
Vol 1067 ◽  
pp. 57-82
Author(s):  
Sedtawut Kwanboon ◽  
Michel Sartori ◽  
Boonsatien Boonsoong
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Record ◽  
Morphological Evidence ◽  
Chiang Mai ◽  
Diagnostic Characters ◽  
The Family ◽  
Chiang Mai Province ◽  
First Time ◽  
Scanning Electron

The aim of this study is to review the family Behningiidae and Potamanthidae in Thailand. Two genera and three species of Behningiidae are recognised: Protobehningia merga Peters &amp; Gillies, 1991, Behningia baei McCafferty &amp; Jacobus, 2006, and Behningia nujiangensis Zhou &amp; Bisset, 2019, which is newly reported from Thailand. The egg structure of B. nujiangensis is described for the first time using scanning electron microscopy. The larva of P. merga is redescribed and its distribution is expended northward with a new record from Chiang Mai province. Two genera and five species of Potamanthidae are identified: Potamanthus formosus Eaton, 1892, Rhoenanthus magnificus Ulmer, 1920 (new record for Thailand), Rhoenanthus obscurus Navás, 1922, Rhoenanthus distafurcus Bae &amp; McCafferty, 1991, and Rhoenanthus speciosus Eaton, 1881. Our morphological evidence is supported by COI data for the family Potamanthidae. Diagnostic characters, distributions, and keys are presented for the larvae of all known species of Thai behningiid and potamanthid mayflies.

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