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Showing 1 to 13 of 13 for “"Insect cuticle"”.
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Biochemical studies of enzymes in insect cuticle hardening
In insects, the cuticle provides protection against physical injury and water loss, rigidness for muscle attachment and mechanical support, and flexibility in inter-segmental and joint areas for mobility. As most insects undergo metamorphosis, they need to shred off old cuticle and synthesize new …
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Micro- and nanoscale features of insect cuticle and their impacts on wetting, friction, and optical properties
The surface of insect cuticle is often modified to form various unique structures such as setae, microtrichia, nanopillars, sculpticells, or gratings. The adaptive roles of these cuticular architectures have become a recent area of interest, notably to serve as inspiration for the creation of novel …
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Molecular biology of the entomopathogenic fungus Beauveria bassiana : insect-cuticle degrading enzymes and development of a new selection marker for fungal transformation
… as potential biological control agent against insect pests. The research of this thesis focused on a B. bassiana strain, ARSEF 252 that is highly pathogenic for the Colorado potato beetle, Leptinotarsa decemlineata. Because of both the strong evidence supporting the role of cuticle-degrading …
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The analysis of gene transcripts associated with conidiation in the insect pathogenic fungus, Metarhizium anisopliae /
Conidia of the insect pathogenic fungus, Metarhizium anisopliae play an important role in pathogenicity because they are the infective propagules that adhere to the surface of the insect, then germinate and give rise to hyphal penetration of the insect cuticle. Conidia are produced in the final …
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Laccase-1 in the pea aphid, Acyrthosiphon pisum (Harris)
… laccase-2 has been found to play a role in the insect cuticle sclerotization and tanning. In addition, it has been hypothesized that laccase-1 may be involved in the oxidation of toxic phenolic compounds ingested by insects during feeding. A laccase-type phenoloxidase has been identified in the …
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ΑΠΟΜΟΝΩΣΗ ΚΑΙ ΚΑΘΑΡΙΣΜΟΣ ΤΟΥ ΕΝΖΥΜΟΥ L-DOPA ΑΠΟΚΑΡΒΟΞΥΛΑΣΗ ΑΠΟ ΤΙΣ ΛΕΥΚΕΣ ΝΥΜΦΕΣ ΤΟΥ ΕΝΤΟΜΟΥ CERATITIS CAPITATA ΚΑΙ ΑΠΟ ΑΝΘΡΩΠΙΝΟ ΝΕΦΡΙΚΟ ΙΣΤΟ. ΣΥΓΚΡ...
… ARE INVOLVED IN SCLEROTIZATION OF INSECT CUTICLE, WE HAVE FOCUSED OUR ATTENTION ON THE PURIFICATION AND THE COMPARISON OF L-DOPA- DECARBOXYLASE FROM HUMAN AND INSECT TISSUES. USING STANDARD BIOCHEMICAL METHODOLOGY THE ENZYME HAS BEEN PURIFIED TO HOMOGENEITY FROM THE WHITE PREPUPAE …
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Taphonomy of pigmentary colours in fossil insects
Extant insects are renowned for the striking colouration displayed in their cuticles. Although fossil insects are abundant and the patternings in their cuticles highly resemble those found in extant insects, these are commonly monotonal, especially in those insects preserved across deep geological …
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Mass Spectrometric Analysis of Tyrosine Metabolic Enzymes
… catecholamine synthesis, melanogenesis and insect cuticle sclerotization. These pathways are highly regulated in both insects and mammals by many well-characterized enzymes including dopa decarboxylase and tyrosine hydroxylase. On the other hand, there are still many enzymes involved in …
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Biological adhesion in wet environments: adaptations and mechanisms
… In Chapters 2 and 3, I explore an aquatic insect (Diptera: Blephariceridae) that uses suction organs to attach to rocks in raging alpine torrents. Suction-based attachment is driven by physical processes requiring a pressure difference and a seal to maintain it. Through my investigations, I …
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Improvement in mechanical properties through structural hierarchies in bio-inspired materials
… biological materials such as bone, nacre, insect cuticle, and sea sponge exoskeleton showcase the use of inferior building blocks like proteins and minerals to create structures that afford load-bearing and armor capabilities. Many of these are composite structures that possess the best of …
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Identification of up-regulated genes of the hyphomycete, Beauveria bassiana, during infection of Leptinotarsa decemlineata
… over-expressed or specifically expressed by the insect pathogenic fungus, B. bassiana during infection of the Colorado potato beetle, L. decemlineata. Two different approaches for the study of B. bassiana gene expression were used: (1) gene expression in an aritficial context of infection, with …
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Ant cuticle microsculpture: diversity, classification, evolution, and function
… chapters. The first chapter is a review of ant cuticle and microsculpture diversity as well as including analyses examining the evolution and lability of microsculpture traits. I then review the literature for functional hypotheses related to ant microsculpture. The second chapter explores the …
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Cuticular surface structures of insects: a source of bioinspiration for novel hydrophobic designs and materials
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01