Jürgen Heinze - Academia.edu (original) (raw)
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University of Medicine and Pharmacy "Iuliu Hatieganu" Cluj-Napoca
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Papers by Jürgen Heinze
We present a new optical polymer thin film sensor for high sensitivity and rapid response gas det... more We present a new optical polymer thin film sensor for high sensitivity and rapid response gas detection. Amphiphilic polymer co-networks (APCN) are used as sensor matrices for fast nitrogen dioxide detection. The sensor consists of an APCN in which the indicator has been embedded. The APCNs were synthesized by free radical induced photo polymerization and result in poly(2-(dimethylamino)ethyl acrylate)-1-polydimethylsiloxane(PDMAEA-l-PDMS). Thin
Kin selection theory predicts not only cooperation, but also conflict within social insect societ... more Kin selection theory predicts not only cooperation, but also conflict within social insect societies. Under kin selection theory, individuals should favor close relatives other non relatives, a behavior known as nepotism. Such nepotistic behavior is expected to occur in policing, where workers prevent each other from laying eggs dependent on the relatedness towards the offspring. The ponerine ant Platythyrea punctata reproduces by thelytokous parthenogenesis, and offspring of one reproductive are genetic identical clones. Nevertheless, policing behavior has been documented in this species. When colonies not only exist of one clone lineage, but several, question arises if policing behavior is any different between single clone and mixed colonies, and if individuals show nepotistic behavior towards members of their own clone lineage. To test predictions from relatedness theory, we performed a behavioral assay using artificial colonies of different clone lineage composition. We found t...
Kin selection theory predicts not only cooperation, but also conflict within social insect societ... more Kin selection theory predicts not only cooperation, but also conflict within social insect societies. Under kin selection theory, individuals should favor close relatives other non relatives, a behavior known as nepotism. Such nepotistic behavior is expected to occur in policing, where workers prevent each other from laying eggs dependent on the relatedness towards the offspring. The ponerine ant Platythyrea punctata reproduces by thelytokous parthenogenesis, and offspring of one reproductive are genetic identical clones. Nevertheless, policing behavior has been documented in this species. When colonies not only exist of one clone lineage, but several, question arises if policing behavior is any different between single clone and mixed colonies, and if individuals show nepotistic behavior towards members of their own clone lineage. To test predictions from relatedness theory, we performed a behavioral assay using artificial colonies of different clone lineage composition. We found t...
Kin selection theory predicts not only cooperation, but also conflict within social insect societ... more Kin selection theory predicts not only cooperation, but also conflict within social insect societies. Under kin selection theory, individuals should favor close relatives other non relatives, a behavior known as nepotism. Such nepotistic behavior is expected to occur in policing, where workers prevent each other from laying eggs dependent on the relatedness towards the offspring. The ponerine ant Platythyrea punctata reproduces by thelytokous parthenogenesis, and offspring of one reproductive are genetic identical clones. Nevertheless, policing behavior has been documented in this species. When colonies not only exist of one clone lineage, but several, question arises if policing behavior is any different between single clone and mixed colonies, and if individuals show nepotistic behavior towards members of their own clone lineage. To test predictions from relatedness theory, we performed a behavioral assay using artificial colonies of different clone lineage composition. We found t...
In the ponerine ant Platythyrea punctata colonies are queenless and the predominant mode of repro... more In the ponerine ant Platythyrea punctata colonies are queenless and the predominant mode of reproduction is thelytoky (females can emerge from unfertilized parthenogenetic laid eggs). Therefore female workers are totipotent and theoretically each young worker can become reproductive. However, reproduction is monopolized by a single female. Because mating is not required to lay diploid female eggs, all females are potential reproductives. Preliminary observations indicated that a replacement reproductive can develop her ovaries within a few days, and monopolize reproduction without out breaking aggressions. This suggested a reproductive rank order among young workers already in the presence of a reproductive that determines who will become the next reproductive. To investigate this, we used a behavioral approach with analysis of social network structures within colonies.
We present a new optical polymer thin film sensor for high sensitivity and rapid response gas det... more We present a new optical polymer thin film sensor for high sensitivity and rapid response gas detection. Amphiphilic polymer co-networks (APCN) are used as sensor matrices for fast nitrogen dioxide detection. The sensor consists of an APCN in which the indicator has been embedded. The APCNs were synthesized by free radical induced photo polymerization and result in poly(2-(dimethylamino)ethyl acrylate)-1-polydimethylsiloxane(PDMAEA-l-PDMS). Thin
Kin selection theory predicts not only cooperation, but also conflict within social insect societ... more Kin selection theory predicts not only cooperation, but also conflict within social insect societies. Under kin selection theory, individuals should favor close relatives other non relatives, a behavior known as nepotism. Such nepotistic behavior is expected to occur in policing, where workers prevent each other from laying eggs dependent on the relatedness towards the offspring. The ponerine ant Platythyrea punctata reproduces by thelytokous parthenogenesis, and offspring of one reproductive are genetic identical clones. Nevertheless, policing behavior has been documented in this species. When colonies not only exist of one clone lineage, but several, question arises if policing behavior is any different between single clone and mixed colonies, and if individuals show nepotistic behavior towards members of their own clone lineage. To test predictions from relatedness theory, we performed a behavioral assay using artificial colonies of different clone lineage composition. We found t...
Kin selection theory predicts not only cooperation, but also conflict within social insect societ... more Kin selection theory predicts not only cooperation, but also conflict within social insect societies. Under kin selection theory, individuals should favor close relatives other non relatives, a behavior known as nepotism. Such nepotistic behavior is expected to occur in policing, where workers prevent each other from laying eggs dependent on the relatedness towards the offspring. The ponerine ant Platythyrea punctata reproduces by thelytokous parthenogenesis, and offspring of one reproductive are genetic identical clones. Nevertheless, policing behavior has been documented in this species. When colonies not only exist of one clone lineage, but several, question arises if policing behavior is any different between single clone and mixed colonies, and if individuals show nepotistic behavior towards members of their own clone lineage. To test predictions from relatedness theory, we performed a behavioral assay using artificial colonies of different clone lineage composition. We found t...
Kin selection theory predicts not only cooperation, but also conflict within social insect societ... more Kin selection theory predicts not only cooperation, but also conflict within social insect societies. Under kin selection theory, individuals should favor close relatives other non relatives, a behavior known as nepotism. Such nepotistic behavior is expected to occur in policing, where workers prevent each other from laying eggs dependent on the relatedness towards the offspring. The ponerine ant Platythyrea punctata reproduces by thelytokous parthenogenesis, and offspring of one reproductive are genetic identical clones. Nevertheless, policing behavior has been documented in this species. When colonies not only exist of one clone lineage, but several, question arises if policing behavior is any different between single clone and mixed colonies, and if individuals show nepotistic behavior towards members of their own clone lineage. To test predictions from relatedness theory, we performed a behavioral assay using artificial colonies of different clone lineage composition. We found t...
In the ponerine ant Platythyrea punctata colonies are queenless and the predominant mode of repro... more In the ponerine ant Platythyrea punctata colonies are queenless and the predominant mode of reproduction is thelytoky (females can emerge from unfertilized parthenogenetic laid eggs). Therefore female workers are totipotent and theoretically each young worker can become reproductive. However, reproduction is monopolized by a single female. Because mating is not required to lay diploid female eggs, all females are potential reproductives. Preliminary observations indicated that a replacement reproductive can develop her ovaries within a few days, and monopolize reproduction without out breaking aggressions. This suggested a reproductive rank order among young workers already in the presence of a reproductive that determines who will become the next reproductive. To investigate this, we used a behavioral approach with analysis of social network structures within colonies.