scholarly journals Effects of a Muscarinic Agonist on Octopamine-stimulated Cyclic AMP Production in American Cockroach(Periplaneta americana)Nerve Cords.

1991 ◽  
Vol 55 (10) ◽  
pp. 2547-2552 ◽  
Author(s):  
Akinori HIRASHIMA ◽  
Kazuhiko OYAMA ◽  
Morifusa ETO
Keyword(s):  
Cyclic Amp ◽  
Periplaneta Americana ◽  
American Cockroach ◽  
Muscarinic Agonist ◽  
Nerve Cords

Octopamine-mediated elevation of cyclic AMP in haemocytes of the American cockroach, Periplaneta americana L.

1987 ◽  
Vol 65 (6) ◽  
pp. 1509-1514 ◽  
Author(s):  
J. W. D. Gole ◽  
G. L. Orr ◽  
R. G. H. Downer
Keyword(s):  
Cyclic Amp ◽  
Adenylate Cyclase ◽  
Adult Male ◽  
Periplaneta Americana ◽  
American Cockroach ◽  
Time Dependent ◽  
Blocking Agents ◽  
Adrenergic Blocking ◽  
Camp Levels ◽  
Dose Dependent

The injection of 10 μL of 5 × 10−3 M octopamine into the haemocoel of adult male Periplaneta americana results in a 20 × increase in haemolymph cyclic AMP (cAMP) levels within 3 min. Synephrine also causes a marked increase in haemolymph cAMP, and less pronounced elevations were obtained following the injection of tyramine, dopamine, norepinephrine, 5-hydroxytryptamine, phenylethanolamine, β-phenylethylamine, and L-phenylephrine. The octopamine effect is time dependent for at least 10 min and dose dependent with the EC50 for the injected dose calculated to be about 2.5 × 10−3 M. These results indicate that the octopamine response is receptor mediated and studies on isolated haemocytes suggest that the octopamine-sensitive receptors are located on haemocytes. Incubation of whole haemocytes in medium containing octopamine results in a dose-dependent elevation of cAMP with the EC50 calculated at about 7.5 × 10−6 M. Synephrine, tyramine, and dopamine also elevate cAMP levels in incubated haemocytes, and the activator of adenylate cyclase, forskolin, causes a marked increase in cAMP. The octopamine-mediated response is blocked by mianserin, phentolamine, and cyproheptadine but not by the β-adrenergic blocking agents propranolol and dichloroisoproterenol.

The Location of Penetration Barriers in the Ganglia of the American Cockroach, Periplaneta Americana (L.)

1968 ◽  
Vol 48 (2) ◽  
pp. 325-338
Author(s):  
M. E. ELDEFRAWI ◽  
A. TOPPOZADA ◽  
M. M. SALPETER ◽  
R. D. O'BRIEN
Keyword(s):  
Methylene Blue ◽  
Nervous System ◽  
Nerve Cord ◽  
Periplaneta Americana ◽  
Slow Component ◽  
Fast Component ◽  
American Cockroach ◽  
Fat Tissue ◽  
Special Protection ◽  
Nerve Cords

1. The nature and location of the barrier system which partially protects the nervous system in insects has been investigated in the American cockroach by studying the fluxes of 14C-butanol, 14C-butyrate, 14C-butylamine and 3H-butyltrimethylammonium. 2. Disruption of the sheath covering the ganglia has little effect on the influx of butanol and butyrate, but increased that of butylamine and butyltrimethylammonium. 3. 2,4-Dinitrophenol slowed the influx of only those compounds whose metabolism it blocks. 4. Effluxes show a fast and a slow component. Disruption of the sheath increases the amount but not the rate of the fast component; it raises the rate of the slow component for butanol, butyrate and butyltrimethylammonium, but not always. 5. Nerve cords stained with methylene blue and freeze-sectioned show dye concentrated in the fat tissue surrounding the nerve cord, then in the neural lamella; a little penetrated the cell bodies of glia and neurones, but the neuropile was unstained. 6. These findings suggest that the external sheath plays some part in restricting cation influx; apart from this the barrier system is a function of the whole ganglion, except that the neuropile may enjoy special protection.

scholarly journals Histological and electrophysiological Studies On The Giant Axons Of The Cockroach Periplaneta Americana

1969 ◽  
Vol 50 (3) ◽  
pp. 629-634
Author(s):  
M. E. SPIRA ◽  
I. PARNAS ◽  
F. BERGMANN
Keyword(s):  
Nerve Cord ◽  
Periplaneta Americana ◽  
American Cockroach ◽  
Giant Axons ◽  
Electrophysiological Studies ◽  
Nerve Cords

1. Nerve cords of the American cockroach were cut between the 5th and 6th abdominal ganglia. 2. All giant axons degenerated in the abdominal regions and were present but collapsed in the thoracic connectives. 3. Unilateral lesions permitted identification of ventral giant axons all along the nerve cord.

scholarly journals Orthoptera and allies in the Maritime provinces, Canada: new records and updated provincial checklists

2019 ◽  
Vol 132 (4) ◽  
pp. 319-329 ◽  
Author(s):  
John Klymko ◽  
Paul Catling ◽  
Jeffrey B. Ogden ◽  
Robert W. Harding ◽  
Donald F. McAlpine ◽  
...  
Keyword(s):  
Prince Edward Island ◽  
Native Species ◽  
Periplaneta Americana ◽  
New Records ◽  
American Cockroach ◽  
Maritime Provinces ◽  
Praying Mantis ◽  
Mole Cricket ◽  
Oecanthus Nigricornis ◽  
Periplaneta Australasiae

We provide an updated checklist of Orthoptera and their allies for each Maritime province of Canada with details for 21 new species records. Drumming Katydid (Meconema thalassinum), recorded from Nova Scotia (NS) and Prince Edward Island (PEI), and Sprinkled Grasshopper (Chloealtis conspersa), recorded from New Brunswick (NB) are reported for the first time from the Maritimes as a whole. We report range extensions in the Maritime region for Australian Cockroach (Periplaneta australasiae; NB), Treetop Bush Katydid (Scudderia fasciata; NS), Short-legged Camel Cricket (Ceuthophilus brevipes; PEI), Spotted Camel Cricket (Ceuthophilus maculatus; PEI), Roesel’s Shield-backed Katydid (Roeseliana roesellii; NS), and Black-horned Tree Cricket (Oecanthus nigricornis; PEI). Short-winged Mole Cricket (Neoscapteriscus abbreviatus; NB) and European Mole Cricket (Gryllotalpa gryllotalpa; NS) are reported as adventives (non-native species that are believed to be not yet established), new to Canada from the Maritimes. Other new records for species not known to be established are Lined Earwig (Doru taeniatum; NS), Australian Cockroach (Periplaneta australasiae; PEI), American Cockroach (Periplaneta americana; NB), Brown Cockroach (Periplaneta brunnea; PEI), Smooth Cockroach (Nyctibora laevigata; NB), West Indian Leaf Cockroach (Blaberus discoidalis; NB), an unidentified Parcoblatta species (NB), Brown-banded Cockroach (Supella longipalpa; PEI), Praying Mantis (Mantis religiosa; NB), and American Bird Grasshopper (Schistocerca americana; NS).

scholarly journals Cholesterol turnover in the American cockroach, Periplaneta americana (L.)

1964 ◽  
Vol 5 (3) ◽  
pp. 418-421
Author(s):  
Hugh E. Vroman ◽  
J.N. Kaplanis ◽  
W.E. Robbins
Keyword(s):  
Periplaneta Americana ◽  
American Cockroach

scholarly journals Preparation of Antioxidant and Antibacterial Chitosan Film from Periplaneta americana

Insects ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 53
Author(s):  
Sicong Chen ◽  
Xunfan Wei ◽  
Zhuoxiao Sui ◽  
Mengyuan Guo ◽  
Jin Geng ◽  
...  
Keyword(s):  
Food Packaging ◽  
Periplaneta Americana ◽  
Uv Light ◽  
Radical Scavenging ◽  
Chitosan Film ◽  
American Cockroach ◽  
Raw Material ◽  
Potential Resource ◽  
Radical Scavenging Ability ◽  
Dpph Radical Scavenging

Among different insects, the American cockroach (Periplaneta americana) has been bred in industrial scale successfully as a potential resource of protein, lipid, and antibacterial peptide. However, the application of its chitosan has not been studied widely, which has hindered the sufficient utilization of P. americana. In this paper, the chitosan from P. americana was separated, characterized, and processed into film (PaCSF) to examine its potential of being applied in food packaging. As the results of different characterizations showed, PaCSF was similar to shrimp chitosan film (SCSF). However, concerning the performances relating to food packaging, the two chitosan films were different. PaCSF contained more water (42.82%) than SCSF did, resulting in its larger thickness (0.08 mm). PaCSF could resist UV light more effectively than SCSF did. Concerning antioxidant activity, the DPPH radical scavenging ability of PaCSF increased linearly with time passing, reaching 72.46% after 8 h, which was better than that of SCSF. The antibacterial activity assay exhibited that PaCSF resisted the growth of Serratia marcescens and Escherichia coli more effectively than SCSF did. The results implied that P. americana chitosan could be a potential raw material for food packaging, providing a new way to develop P. americana.

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