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"Entomology Juvenile literature."
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mevalonate pathway and the synthesis of juvenile hormone in insects
▪ Abstract The mevalonate pathway in insects has two important peculiarities, the absence of the sterol branch and the synthesis of juvenile hormone (JH), that may have influenced the mechanisms of regulation. The data available on these mechanisms indicate that cholesterol does not play a regulatory role and that JH modulates transcript levels of a number of genes of the mevalonate pathway or can influence the translatability and/or stability of the transcripts themselves. These data suggest that the mevalonate pathway in insects can best be interpreted in terms of coordinated regulation, in which regulators act in parallel to a number of enzymes, as occurs in the cholesterol-driven pathway in vertebrates.
Journal Article
Bug science : 20 projects and experiments about arthropods : insects, arachnids, algae, worms, and other small creatures
It might be creepy, but entomology is one cool branch of science for kids! Bug Science is a funny, educational book filled with cool workshops that are ideal for science fairs. Sometimes it's all about the bugs, like an experiment to reroute ants. Sometimes it's about how we interact with bugs, like the workshop on spider phobias. You can even turn your friends into bug bait to see who has the sweetest skin. Bug Science is peppered with sidebars from entomologists and is sure to inspire a new appreciation for the buggy world we live in.
Book
INSECT P450 ENZYMES
The P450 enzymes (mixed function oxidases, cytochrome P450 monooxygenases),
a diverse class of enzymes found in virtually all insect tissues, fulfill many
important tasks, from the synthesis and degradation of ecdysteroids and
juvenile hormones to the metabolism of foreign chemicals of natural or
synthetic origin. This diversity in function is achieved by a diversity in
structure, as insect genomes probably carry about 100 P450 genes, sometimes
arranged in clusters, and each coding for a different P450 enzyme. Both
microsomal and mitochondrial P450s are present in insects and are best studied
by heterologous expression of their cDNA and reconstitution of purified
enzymes. P450 genes are under complex regulation, with induction playing a
central role in the adaptation to plant chemicals and regulatory mutations
playing a central role in insecticide resistance. Polymorphisms in induction or
constitutive expression allow insects to scan their P450 gene repertoire for
the appropriate response to chemical insults, and these evolutionary pressures
in turn maintain P450 diversity.
Journal Article
Buzzing with questions : the inquisitive mind of Charles Henry Turner
\"Questions buzzed endlessly in Charles Henry Turner's mind. Fascinated by bugs and other animals, he wondered: Can spiders learn? How do ants find their way home? Can bugs see color?\"--dust jacket.
Book
Contemporary Insect Diagnostics
Contemporary Insect Diagnostics aids entomologists as they negotiate the expectations and potential dangers of the practice.It provides the reader with methods for networking with regulatory agencies, expert laboratories, first detectors, survey specialists, legal and health professionals, landscape managers, crop scouts, farmers and the lay.
eBook
The girl who drew butterflies : how Maria Merian's art changed science
\"Newbery-Honor winning author Joyce Sidman explores the extraordinary life and scientific discoveries of Maria Merian, who discovered the truth about metamorphosis and documented the science behind the mystery in this visual biography that features many original paintings by Maria herself.\"-- Provided by publisher.
Book
DENSITY-DEPENDENT PHYSIOLOGICAL PHASE IN INSECTS
Insects respond to crowding in a variety of ways that are usually
exemplified by rapid changes in behavior and culminate in enduring long-term
morphological and/or chromatic responses. A common feature of both short-term
and long-term effects is that they are graded, dependent not only on density
but also on the duration and on phase history of the maternal generation.
Because of their exoskeletons, which are persistent for the duration of each
instar and endure throughout adult life, overt changes in morphology or
coloration are restricted to the molting period and shortly afterward, when
cuticular hardening and pigmentation are expressed. Changes in internal organs
or metabolism elicited by population density, being independent of integumental
constraints, are not restricted to the molting period, but the temporal
difference between internal and external responses is not of fundamental
significance. Intraspecific responses to the presence of sibling insects are of
apparent ecological significance and often involve directional movement and/or
migration. They are mediated via the sensory system, involve signal
transduction, and elicit downstream biochemical and physiological changes.
Journal Article