scholarly journals Antennal sensilla of head of poultry shaft louse, Menopon gallinae (Phthiraptera, Insecta, Menoponidae, Amblycera)

2012 ◽  
Vol 4 (2) ◽  
pp. 196-199
Author(s):  
Surman Arya ◽  
Suneel Kumar Singh
Keyword(s):  
Anterior Part ◽  
Sense Organ ◽  
Terminal Segment ◽  
Avian Host ◽  
Antennal Sensilla ◽  
Electron Microscopic ◽  
Pit Organ ◽  
Fourth Segment ◽  
Sem Study ◽  
Poultry Shaft Louse

Phthirapteran ectoparasites (lice) are very small arthropodan creature which spend their life on different mammalian and avian host body. Many morphological features of these tiny creatures are not visible under simple microscopic study and hence scanning electron microscopic (SEM) study is required for specific details. Antennal sensillum is also one of the special features located on anterior part of the head of the louse. The present study on the sample specimen of poultry louse, Menopon gallinae (Phthiraptera : Amblycera) showed presence of a small, ovoid scape and pedicel (broad cup-like structure having narrower base) seen in antennal sensilla under SEM. In addition to sensory setae, sense organ was present on terminal segment. Tuft organ contain 6/7 small peg like structure. Pit organ was also visible at the sub-terminal area of fourth segment. Presence of any structure resembling coeloconic chaemo-receptor was not observed on any flagellar sub-segment of M. gallinae.

Transmission electron microscopic study of antennal sensilla of the female black fly, Simulium arcticum (IIL-3; IIS-10.11) (Diptera: Simuliidae)

1990 ◽  
Vol 68 (7) ◽  
pp. 1443-1453 ◽  
Author(s):  
J. F. Sutcliffe ◽  
E. G. Kokko ◽  
J. L. Shipp
Keyword(s):  
Electron Micrographs ◽  
Host Location ◽  
Scanning Electron Micrographs ◽  
Antennal Sensilla ◽  
Electron Microscopic ◽  
Olfactory Sensilla ◽  
Transmission Electron Microscopic Study ◽  
Sensilla Trichodea ◽  
Transmission Electron ◽  
Transmission Electron Microscopic

The innervation and internal ultrastructure of the antennal flagellar sensilla of female Simulium arcticum (cytotypes IIL-3 and IIS-10.11) are described from transmission electron micrographs. Two types of contact chemosensilla and at least four types of olfactory sensilla (sensilla trichodea, two or more types of sensilla basiconica, grooved pegs) were found. These correspond to sensillar types previously described from scanning electron micrographs of the antennae of these species. In addition, possible thermo- and hygro-receptive sensilla coeloconica are described from the antennal tip. The sensory complement of the simuliid antenna is compared with those of certain other dipterans, and possible roles of these sensilla in host location and other behaviours are discussed.

Craniofacial abnormalities induced by retinoic acid: a preliminary histological and scanning electron microscopic (SEM) study

2000 ◽  
Vol 52 (5) ◽  
pp. 445-453 ◽  
Author(s):  
E.-N. Emmanouil-Nikoloussp ◽  
M. Goret-Nicaise ◽  
Ch. Foroglou ◽  
E. Katsarma ◽  
A. Dhem ◽  
...  
Keyword(s):  
Retinoic Acid ◽  
Craniofacial Abnormalities ◽  
Electron Microscopic ◽  
Sem Study ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

Scanning Electron Microscopic Study of the Eggs of the Warthog Louse (Haematopinus Phacochoeri)

1997 ◽  
Vol 3 (S2) ◽  
pp. 113-114
Author(s):  
C. Baker ◽  
E.D. Green
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Environmental Changes ◽  
General Structure ◽  
Electron Microscopic ◽  
Razor Blade ◽  
Scanning Electron Microscopic Study ◽  
Sem Study ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

The large eggs of Haematopinus phacochoeri are found attached to the long dorsal mane bristles of the diurnal warthog. The eggs are generally exposed to great environmental stresses such as excessive sunlight and temperature as well as the occasional plunge under water or mud during grooming. This investigation was therefore undertaken to determine how the eggs of H. phococoeri are adapted to tolerate the various environmental changes it is constantly exposed to. To our knowledge no other SEM study on the eggs of this species has been performed.Specimens still attached to the bristles were fixed in 70% ethanol, dehydrated and ultrasonically cleaned. Some eggs were longitudinally sectioned with a razor blade to expose the chorionic layers. The eggs were critical point dried in liquid CO2, mounted and viewed by means of a Leica Stereoscan 420 scanning electron microscope.The general structure of the shell consists of two layers of chorion, i.e. the endo-and exochorion. These two layers are attached at the pre-formed line of weakness at the operculum and again near the hydropyle. Elsewhere these two layers are completely separated by the respiratory layer.

A SEM study of antennal sensilla in Maladera orientalis Motschulsky (Coleoptera: Scarabaeidae: Melolonthinae)

Micron ◽  
2019 ◽  
Vol 119 ◽  
pp. 17-23 ◽  
Author(s):  
Kai-Min Shao ◽  
Yan Sun ◽  
Wen-Kai Wang ◽  
Li Chen
Keyword(s):  
Antennal Sensilla ◽  
Sem Study

scholarly journals An Experimental, Numerical and SEM Study of Fracture in a Thin Polymer Film

2013 ◽  
Vol 592-593 ◽  
pp. 225-228
Author(s):  
Eskil Andreasson ◽  
Nasir Mehmood ◽  
Tan Mao ◽  
Sharon Kao-Walter
Keyword(s):  
Polymer Film ◽  
Element Model ◽  
Thin Polymer Film ◽  
Electron Microscopic ◽  
Sem Micrographs ◽  
Thin Polymer ◽  
Load Carrying ◽  
Sem Study ◽  
Different Shapes ◽  
Material Fracture

Observations and analysis of samples from scanning electron microscopic (SEM) micrographs has been concerned in this work. The samples originate from fractured mechanical mode I tensile testing of a thin polymer film made of polypropylene used in the packaging industry. Three different shapes of the crack; elliptical, circular and flat, were used to investigate the decrease in load carrying capacity. The fracture surfaces looked similar in all studied cases. Brittle-like material fracture process was observed both by SEM micrographs and the experimental mechanical results. A finite element model was created in Abaqus as a complementary tool to increase the understanding of the mechanical behaviour of the material. The numerical material models were calibrated and the results from the simulations were comparable to the experimental results.

scholarly journals The Effect of Salvadora Persica Extract (Miswak) and Chlorahexidine Gluconate on Human Dentin: A SEM Study

2002 ◽  
Vol 3 (3) ◽  
pp. 27-35 ◽  
Author(s):  
Khalid Almas
Keyword(s):  
Periodontal Diseases ◽  
Chlorhexidine Gluconate ◽  
Control Group ◽  
Salvadora Persica ◽  
Electron Microscopic ◽  
Mechanical Removal ◽  
Sem Study ◽  
Human Dentin ◽  
Bacterial Plaque

Abstract Bacterial plaque is solely responsible for the initiation and progression of periodontal diseases. There are different mechanical and chemical methods available for the maintenance of oral health through plaque control. Toothbrushes and miswak (chewing sticks) are widely used for the mechanical removal of plaque. Chlorhexidine gluconate (CHX) is one of the best-proven anti-plaque agents. The aim of this study was to evaluate the effects of CHX and miswak extract on healthy and periodontally involved human dentin. Sixteen human premolars recently extracted for orthodontic and periodontal reasons were used in the study. Teeth were free from caries, cervical restorations, or erosions. The dentin disc specimens were prepared and half of them were etched with 6% citric acid for 120 sec. Both etched and unetched were further treated with CHX and 50% miswak extract and prepared for Scanning Electron Microscopic (SEM) examination. It was concluded that CHX 0.2% and miswak extract 50% had a similar effect on dentin in the control group. Miswak extract removed more smear layer as compared to CHX. Further research is needed in vivo to compare the effects of CHX and miswak extract on periodontally involved teeth and teeth with dentinal hypersensitivity. Citation Almas K. The Effect of Salvadora Persica Extract (Miswak) and Chlorhexidine Gluconate on Human Dentin: A SEM Study. J Contemp Dent Pract 2002 August;(3)3: 027-035.

SEM Study on the Etiology of Pseudofolliculitis Barbae

1975 ◽  
Vol 33 ◽  
pp. 362-363
Author(s):  
E. O. Bernstein ◽  
E. Kairinen
Keyword(s):  
Black Men ◽  
White Men ◽  
Electron Microscopic ◽  
Biological Origin ◽  
Submandibular Region ◽  
Black And White ◽  
Sem Study ◽  
Differences Of Opinion ◽  
Scanning Electron Microscopic ◽  
Hair Formation

Pseudofolliculitis barbae (PF) is a dermatological disorder affecting approximately 50%. of black men who shave. The disease is characterized by ingrown hairs and attendant papules, pustules or vesicles ("razor bumps") which can occur over the entire beard area but which are most prevalent in the submandibular region. While it is generally accepted that the disease is of biological origin, PF appears to be triggered by shaving which in turn leads to the immediate cause of the disorder, ingrown hair formation. However, differences of opinion exist as to the basic etiology of PF--that is, how ingrown hair formation occurs in certain individuals and not others. Therefore a comparison of the skin, hair and post-shave beard hair regrowth patterns of "normal" and PF-prone black and white men by scanning electron microscopic (SEM) examination of polyethylene replicas was undertaken to determine the causes of ingrown hair formation.

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