Structural Characterization of Nanoparticles Loaded with Garlic Essential Oil and Their Insecticidal Activity againstTribolium castaneum(Herbst) (Coleoptera: Tenebrionidae)

2009 ◽  
Vol 57 (21) ◽  
pp. 10156-10162 ◽  
Author(s):  
Feng-Lian Yang ◽  
Xue-Gang Li ◽  
Fen Zhu ◽  
Chao-Liang Lei
Keyword(s):  
Essential Oil ◽  
Structural Characterization ◽  
Insecticidal Activity ◽  
Garlic Essential Oil ◽  
Coleoptera Tenebrionidae

scholarly journals Insecticidal activity of garlic essential oil and their constituents against the mealworm beetle, Tenebrio molitor Linnaeus (Coleoptera: Tenebrionidae)

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Angelica Plata-Rueda ◽  
Luis Carlos Martínez ◽  
Marcelo Henrique Dos Santos ◽  
Flávio Lemes Fernandes ◽  
Carlos Frederico Wilcken ◽  
...  
Keyword(s):  
Essential Oil ◽  
Insecticidal Activity ◽  
Tenebrio Molitor ◽  
Mealworm Beetle ◽  
Garlic Essential Oil ◽  
Coleoptera Tenebrionidae

Structural characterization of chitosan nanoparticle loaded with Piper nigrum essential oil for biological efficacy against the stored grain pest control

2020 ◽  
Vol 166 ◽  
pp. 104566 ◽  
Author(s):  
Vallavan Rajkumar ◽  
Chinappan Gunasekaran ◽  
Jayaraman Dharmaraj ◽  
Panneerselvam Chinnaraj ◽  
Cheruvathur Amita Paul ◽  
...  
Keyword(s):  
Essential Oil ◽  
Pest Control ◽  
Structural Characterization ◽  
Piper Nigrum ◽  
Stored Grain ◽  
Biological Efficacy ◽  
Chitosan Nanoparticle ◽  
Stored Grain Pest

scholarly journals Chemical composition and fumigant effect of essentialoil of Lippia sidoides Cham. and monoterpenes against Tenebrio molitor (L.) (coleoptera: tenebrionidae)

2011 ◽  
Vol 35 (4) ◽  
pp. 664-671 ◽  
Author(s):  
Rafaela Karin Lima ◽  
Maria das Graças Cardoso ◽  
Jair Campos Moraes ◽  
Stephan Malfitano Carvalho ◽  
Vanessa Gregório Rodrigues ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Binary Mixture ◽  
Essential Oils ◽  
Insecticidal Activity ◽  
Tenebrio Molitor ◽  
Synergic Effect ◽  
Lippia Sidoides ◽  
Coleoptera Tenebrionidae

The chemical composition of Lippia sidoides essential oils obtained by hydrodistillation was characterized and quantified by GC/MS and their insecticidal activity by fumigation test was assayed against Tenebrio molitor. Moreover, the toxicity of monoterpenes carvacrol, 1,8-cineol and thymol were also evaluated when applied alone or in binary (1:1) or tertiary (1:1:1) mixture. The essential oil of L. sidoides has as major constituents carvacrol (31.68%), ρ-cymene (19.58%), 1,8-cineole (9.26%) and ϒ-terpinene (9.21%), from a 21 compounds identified, being 92.53% of total. Both compounds have insecticidal activity against T. molitor, being the degree of toxicity of carvacrol > 1,8-cineole > L. sidoides essential oil > thymol, and its respectively LC50 at 24h were 5.53; 5.71; 8.04 and 14.71 µL/L air. When the different mixture of carvacrol, 1,8-cineole and thymol was assayed against T. molitor, the synergism among them was observed. For the mixture of carvacrol:1,8-cineole LC50 was 5.34 µL/L air; carvacrol:thymol 7.67 µL/L air; 1,8-cineole:thymol 7.51 µL/L air and carvacrol:1,8-cineole:thymol 6.34 µL/L air. Mainly, the monoterpene thymol had a synergic effect, which increased the toxicity of carvacrol and 1,8-cineole, both in binary mixture like carvacrol:thymol and 1,8-cineole:thymol.

New ultrastructural findings about Borrelia burgdorferi by cryofixation, negative staining, thin sectioning and scanning techniques

1990 ◽  
Vol 48 (3) ◽  
pp. 582-583
Author(s):  
S. F. Hayes ◽  
M. D. Corwin ◽  
T. G. Schwan ◽  
D. W. Dorward ◽  
W. Burgdorfer
Keyword(s):  
Lyme Disease ◽  
Borrelia Burgdorferi ◽  
Structural Characterization ◽  
Negative Staining ◽  
Low Speed ◽  
Thin Sectioning ◽  
Ultrastructural Findings

Characterization of Borrelia burgdorferi strains by means of negative staining EM has become an integral part of many studies related to the biology of the Lyme disease organism. However, relying solely upon negative staining to compare new isolates with prototype B31 or other borreliae is often unsatisfactory. To obtain more satisfactory results, we have relied upon a correlative approach encompassing a variety EM techniques, i.e., scanning for topographical features and cryotomy, negative staining and thin sectioning to provide a more complete structural characterization of B. burgdorferi.For characterization, isolates of B. burgdorferi were cultured in BSK II media from which they were removed by low speed centrifugation. The sedimented borrelia were carefully resuspended in stabilizing buffer so as to preserve their features for scanning and negative staining. Alternatively, others were prepared for conventional thin sectioning and for cryotomy using modified procedures. For thin sectioning, the fixative described by Ito, et al.

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