Resorption des alten Panzers vor der Hutung bei dem FlukrebsOrconectes limosus@@@Absorption of the old exoskeleton before moult in the crayfishOrconectes limosus: Schicksal des freigesetzten N-acetyl-glucosamins@@@Metabolic pate of liberated N-acetyl-glucosamine

@article{Speck1972ResorptionDA,
  title={Resorption des alten Panzers vor der Hutung bei dem FlukrebsOrconectes limosus@@@Absorption of the old exoskeleton before moult in the crayfishOrconectes limosus: Schicksal des freigesetzten N-acetyl-glucosamins@@@Metabolic pate of liberated N-acetyl-glucosamine},
  author={U. Speck and K. Urich},
  journal={Journal of Comparative Physiology A-neuroethology Sensory Neural and Behavioral Physiology},
  year={1972},
  volume={78},
  pages={210-220}
}
  • U. Speck, K. Urich
  • Published 1972
  • Biology
  • Journal of Comparative Physiology A-neuroethology Sensory Neural and Behavioral Physiology
14 Citations
Modelling developmental changes in the carbon and nitrogen budgets of larval brachyuran crabs
  • K. Anger
  • Biology
  • Helgoländer Meeresuntersuchungen
  • 2006
TLDR
Biochemical data suggest that lipid utilization efficiency is particularly high in early moult cycle stages, whereas protein usage efficiency is higher in later stages, and cumulative C and N budgets show in subsequent larval instars conspicuously increasing figures in all of their parameters. Expand
Changes in the chemical composition of the common shore crab,Carcinus maenas, during the molting cycle
TLDR
The main organic constituents and their variations during the molt cycle were quantitatively determined and it is shown that the proportion of hemocyanin to total proteins remains constant during the molting cycle. Expand
Das Schicksal der Nährstoffe bei dem FlußkrebsOrconectes limosus
Summary1.U-14C-labelled glucose, amino acid mixture, palmitate, starch or protein were fed to the crayfish by means of a stomach catheter, 5 min to several hours after feeding determinations wereExpand
Partial characterization of chitin degrading enzymes from two euphausiids, Euphausia superba and Meganyctiphanes norvegica
TLDR
P pH and temperature optima, thermal stability and kinetic properties of the two enzymes are strikingly similar in the polar E. superba versus the boreal euphausiid M. norvegica, suggesting a functional adaptation to a low temperature range in seawater. Expand
Physiology and composition of molting fluid and midgut lumenal contents in the silkmothHyalophora cecropia
TLDR
It is proposed that cells in the epidermis actively transport potassium into the exuvial space with an accompanying passive bulk flow of water to account for the increase in molting fluid. Expand
Resorption des alten Panzers vor der Häutung bei dem FlußkrebsOrconectes limosus
TLDR
It is concluded, that the absorbed N-actyl-glucosamine is not mixed with general metabolic pools, but is accumulated in specific pools to be re-used for chitin synthesis and energy metabolism. Expand
Fine structural survey of old cuticle degradation during pre-ecdysis in two European Atlantic crabs.
TLDR
Changes due to the degradation of the old exoskeleton and related events in the sclerites, articular membranes, and gills of two decapod crustaceans (Carcinus maenas and Macropipus puber) during pre-ecdysis were monitored. Expand
The influence of starvation and copper exposure on the composition of the dorsal carapace and distribution of trace metals in the shore crab Carcinus maenas (L.)
TLDR
Starvation in combination with copper exposure resulted in alterations in both carapace composition and trace metal loads, andCarapace calcium concentrations were reduced significantly following copper exposure irrespective of the nutritional state of the crabs. Expand
Nucleic acids and growth of larval and early juvenile spider crab,Hyas araneus
TLDR
The results suggest that variation in nucleic acids may provide useful insights into mechanisms of growth on the cellular level (cell multiplication vs cell enlargement) and lack of general correlation with variation in growth rates of H. araneus larvae shows that the use ofucleic acids as a measure of growth is probably based upon too simplistic assumptions and may not yield reliable predictions, when growth is associated with developmental events. Expand
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References

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Quantitative Bedeutung der Reservestoffe für Chitinsynthese, Energiestoffwechsel und osmotische Vorgänge während der Häutung des Flußkrebses Orconectes limosus
Summary1.From 2 days before to 2 days after moulting crayfish do not feed. By means of repeated analyses of all important body constituents and metabolites a balance sheet of metabolism was made forExpand
The Biochemistry of Sugars and Polysaccharides in Insects
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This chapter presents an investigation of the biochemistry of this animal group, which has in general lagged far behind that of micro-organisms on the one hand and vertebrate animals on the other. Expand
Chitine et chitinolyse
Metabolic conversions during pupation of the cecropia silkworm. 1. Deposition and utilization of nutrient reserves.
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The earliest assertion of the conversion of fat into carbohydrate in an insect was based on the observation in silkworms that, after the cessation of food intake, glycogen increased concomitantly with decrease in lipids (Couvreur, 1895). Expand
The physiology of Crustacea
The distribution of chitinase activity in the body of the American cockroach
TLDR
The cuticle together with the hypodermis and associated musculature contains more of the total chitinase activity of the cockroach body than any other body fraction, although the saliva and digestive juices also display notable activity. Expand
THE MOLTING CYCLE OF THE SPINY LOBSTER, PANULIRUS ARGUS LATREILLE. II. PRE-ECDYSIAL HISTOLOGICAL AND HISTOCHEMICAL CHANGES IN THE HEPATOPANCREAS AND INTEGUMENTAL TISSUES
TLDR
The integumental tissues from the branchial region of an intermolt spiny lobster (late Stage C) are bordered by an outer and an inner integument, which is composed of columnar epidermal cells and a sub-epidermal connective tissue of a loose spongy type. Expand
Some Features of the Calcium Metabolism of the Shore Crab (Carcinus maenas Pennant)
One of the features of the Arthropoda is the possession of a stiff outer covering of chitin secreted by the epidermis. This outer covering is cast periodically, and it is a characteristic of theExpand