Jürgen Heinze - Academia.edu (original) (raw)

Papers by Jürgen Heinze

Research paper thumbnail of Rapid and sensitive optochemical nitrogen dioxide detection: Silicone-containing amphiphilic co-networks as well suited immobilization matrices for gas sensing

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

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Research paper thumbnail of Mechanism of thelytokous parthenogenesis and colony structure in Platythyrea punctata

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Research paper thumbnail of Mechanism of thelytokous parthenogenesis and colony structure in Platythyrea punctata

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Research paper thumbnail of Mechanism of thelytokous parthenogenesis and colony structure in Platythyrea punctata

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Research paper thumbnail of Mechanism of thelytokous parthenogenesis and colony structure in Platythyrea punctata

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Research paper thumbnail of Sociogenetics of two sister species in the ponerine ant genus Pachycondyla

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Research paper thumbnail of Sociogenetics of two sister species in the ponerine ant genus Pachycondyla

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Research paper thumbnail of Sociogenetics of two sister species in the ponerine ant genus Pachycondyla

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Research paper thumbnail of Sociogenetics of two sister species in the ponerine ant genus Pachycondyla

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Research paper thumbnail of We are one but not the same – population - and colony structure of the thelytokous ant Platythyrea punctata in Puerto Rico

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Research paper thumbnail of We are one but not the same – population - and colony structure of the thelytokous ant Platythyrea punctata in Puerto Rico

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Research paper thumbnail of We are one but not the same – population - and colony structure of the thelytokous ant Platythyrea punctata in Puerto Rico

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Research paper thumbnail of The metamorphosis of the queen’s chemical signature in the ant Pachycondyla villosa

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Research paper thumbnail of The metamorphosis of the queen’s chemical signature in the ant Pachycondyla villosa

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Research paper thumbnail of The metamorphosis of the queen’s chemical signature in the ant Pachycondyla villosa

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Research paper thumbnail of The metamorphosis of the queen’s chemical signature in the ant Pachycondyla villosa

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Research paper thumbnail of It’s every ant for herself – selfish and non-nepotistic behavior among and within clone lineages in a thelytokous ant

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...

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Research paper thumbnail of It’s every ant for herself – selfish and non-nepotistic behavior among and within clone lineages in a thelytokous ant

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...

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Research paper thumbnail of It’s every ant for herself – selfish and non-nepotistic behavior among and within clone lineages in a thelytokous ant

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...

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Research paper thumbnail of Reproductive succession in a thelytokous ant revealed by social network analysis

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.

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Research paper thumbnail of Rapid and sensitive optochemical nitrogen dioxide detection: Silicone-containing amphiphilic co-networks as well suited immobilization matrices for gas sensing

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

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Research paper thumbnail of Mechanism of thelytokous parthenogenesis and colony structure in Platythyrea punctata

ABSTRACT

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Research paper thumbnail of Mechanism of thelytokous parthenogenesis and colony structure in Platythyrea punctata

ABSTRACT

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Research paper thumbnail of Mechanism of thelytokous parthenogenesis and colony structure in Platythyrea punctata

ABSTRACT

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Research paper thumbnail of Mechanism of thelytokous parthenogenesis and colony structure in Platythyrea punctata

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Research paper thumbnail of Sociogenetics of two sister species in the ponerine ant genus Pachycondyla

ABSTRACT

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Research paper thumbnail of Sociogenetics of two sister species in the ponerine ant genus Pachycondyla

ABSTRACT

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Research paper thumbnail of Sociogenetics of two sister species in the ponerine ant genus Pachycondyla

ABSTRACT

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Research paper thumbnail of Sociogenetics of two sister species in the ponerine ant genus Pachycondyla

ABSTRACT

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Research paper thumbnail of We are one but not the same – population - and colony structure of the thelytokous ant Platythyrea punctata in Puerto Rico

ABSTRACT

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Research paper thumbnail of We are one but not the same – population - and colony structure of the thelytokous ant Platythyrea punctata in Puerto Rico

ABSTRACT

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Research paper thumbnail of We are one but not the same – population - and colony structure of the thelytokous ant Platythyrea punctata in Puerto Rico

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Research paper thumbnail of The metamorphosis of the queen’s chemical signature in the ant Pachycondyla villosa

ABSTRACT

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Research paper thumbnail of The metamorphosis of the queen’s chemical signature in the ant Pachycondyla villosa

ABSTRACT

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Research paper thumbnail of The metamorphosis of the queen’s chemical signature in the ant Pachycondyla villosa

ABSTRACT

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Research paper thumbnail of The metamorphosis of the queen’s chemical signature in the ant Pachycondyla villosa

ABSTRACT

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Research paper thumbnail of It’s every ant for herself – selfish and non-nepotistic behavior among and within clone lineages in a thelytokous ant

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...

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Research paper thumbnail of It’s every ant for herself – selfish and non-nepotistic behavior among and within clone lineages in a thelytokous ant

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...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of It’s every ant for herself – selfish and non-nepotistic behavior among and within clone lineages in a thelytokous ant

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...

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Research paper thumbnail of Reproductive succession in a thelytokous ant revealed by social network analysis

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.

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