title: Cyclometalated gold(III) iminophosphoranes which incorporate carbohydrate groups

authors: Jarman, Bevan P.

subjects: gold complexes

abstract: Iminophosphoranes with organic groups derived from d-glucose, d-galactose and l-arabinose have been used to prepare gold(III) dichloride complexes via mercurated intermediates, since direct cyclometallation was unsuccessful. Structures and full spectroscopic data are reported. Replacement of one or more of the chloride ligands by PPh3, or by thiosalicylate gave new derivatives. Biological screening showed no enhanced activity relative to other alkyl or aryl analogues.

text: Cyclometalated gold(III) iminophosphoranes which incorporate carbohydrate groups Iminophosphoranes with organic groups derived from d-glucose, d-galactose and l-arabinose have been used to prepare gold(III) dichloride complexes via mercurated intermediates, since direct cyclometallation was unsuccessful. Structures and full spectroscopic data are reported. Replacement of one or more of the chloride ligands by PPh3, or by thiosalicylate gave new derivatives. Biological screening showed no enhanced activity relative to other alkyl or aryl analogues.

year: 2012

title: Bioconcrete: next generation of self-healing concrete

authors: Seifan, Mostafa

subjects: Science & Technology

abstract: Concrete is one of the most widely used construction materials and has a high tendency to form cracks. These cracks lead to significant reduction in concrete service life and high replacement costs. Although it is not possible to prevent crack formation, various types of techniques are in place to heal the cracks. It has been shown that some of the current concrete treatment methods such as the application of chemicals and polymers are a source of health and environmental risks, and more importantly, they are effective only in the short term. Thus, treatment methods that are environmentally friendly and long-lasting are in high demand. A microbial self-healing approach is distinguished by its potential for long-lasting, rapid and active crack repair, while also being environmentally friendly. Furthermore, the microbial self-healing approach prevails the other treatment techniques due to the efficient bonding capacity and compatibility with concrete compositions. This study provides an overview of the microbial approaches to produce calcium carbonate (CaCO₃). Prospective challenges in microbial crack treatment are discussed, and recommendations are also given for areas of future research.

text: Bioconcrete: next generation of self-healing concrete Concrete is one of the most widely used construction materials and has a high tendency to form cracks. These cracks lead to significant reduction in concrete service life and high replacement costs. Although it is not possible to prevent crack formation, various types of techniques are in place to heal the cracks. It has been shown that some of the current concrete treatment methods such as the application of chemicals and polymers are a source of health and environmental risks, and more importantly, they are effective only in the short term. Thus, treatment methods that are environmentally friendly and long-lasting are in high demand. A microbial self-healing approach is distinguished by its potential for long-lasting, rapid and active crack repair, while also being environmentally friendly. Furthermore, the microbial self-healing approach prevails the other treatment techniques due to the efficient bonding capacity and compatibility with concrete compositions. This study provides an overview of the microbial approaches to produce calcium carbonate (CaCO₃). Prospective challenges in microbial crack treatment are discussed, and recommendations are also given for areas of future research.

year: 2016

title: Mapping Māori knowledge from the past to inform marine management futures

authors: Paul-Burke, Kura

subjects: mātauranga Māori

abstract: This article provides an overview of research which used mātauranga moana (Māori marine knowledge systems) to inform and assist Western science field research methods and surveys. Place-based Māori marine knowledge identified the traditional distribution range and sizing of taonga (culturally important) species in traditional coastal areas which had been fished and managed by consecutive generations of Māori; kina, Evechinus chloroticus, sea urchin; koura, Jasus edwardsii, red rock lobster; kūtai, Perna canaliculus, green lipped mussel; and pāua, Haliotis iris, abalone. This knowledge was then mapped and used as the baseline for sub-tidal marine science field research surveys. Findings from the transdisciplinary marine research was used to develop management actions to assist Māori and Government entities for improving, enhancing and safeguarding marine taonga species into the future. This article critically discusses and demonstrates the relevance and complementarity of mātauranga Māori and Western science, and the importance of kaupapa Māori strategies for empowering Māori collaboration and voices in marine research co-development, implementation and communication.

text: Mapping Māori knowledge from the past to inform marine management futures This article provides an overview of research which used mātauranga moana (Māori marine knowledge systems) to inform and assist Western science field research methods and surveys. Place-based Māori marine knowledge identified the traditional distribution range and sizing of taonga (culturally important) species in traditional coastal areas which had been fished and managed by consecutive generations of Māori; kina, Evechinus chloroticus, sea urchin; koura, Jasus edwardsii, red rock lobster; kūtai, Perna canaliculus, green lipped mussel; and pāua, Haliotis iris, abalone. This knowledge was then mapped and used as the baseline for sub-tidal marine science field research surveys. Findings from the transdisciplinary marine research was used to develop management actions to assist Māori and Government entities for improving, enhancing and safeguarding marine taonga species into the future. This article critically discusses and demonstrates the relevance and complementarity of mātauranga Māori and Western science, and the importance of kaupapa Māori strategies for empowering Māori collaboration and voices in marine research co-development, implementation and communication.

year: 2020