title: Studies of New Zealand Marine Organisms

authors: Till, Marisa

subjects: Natural products

abstract: The chemical study of three New Zealand marine organisms is described, along with a survey of the chemistry and biological activity of eighty-five marine organisms collected from New Zealand waters.
The study of the New Zealand marine bryozoan Pterocella vesiculosa has resulted in the isolation of three new compounds; pterocellin H, pterocellin I and 1-methyl-5-bromo-8-methoxy-β-carboline. These compounds were characterised using high resolution mass spectrometry, one- and two-dimensional nuclear magnetic resonance spectroscopy and X-ray crystallography. The biological activity of these compounds was investigated and a discussion of the results including a comparison with the activity of closely related compounds is also presented.
The crude extracts of eighty-five marine organisms were surveyed to establish their biological activity and chemical constituents. The results of this study indicated which species had interesting biological activity. The chemical survey allowed geographical and intra-species comparisons of chemical constituents between samples, as well as potentially indicating the presence of known secondary metabolites. For the Pterocella vesiculosa samples the survey methodology clearly illustrated the presence of pterocellins A and B.
Two marine organisms were chosen for further investigation based on their biological activity and chemical survey results. Bioactivity directed isolation procedures yielded no new compounds from the organisms. The sterol composition of these species is also presented.

text: Studies of New Zealand Marine Organisms The chemical study of three New Zealand marine organisms is described, along with a survey of the chemistry and biological activity of eighty-five marine organisms collected from New Zealand waters.
The study of the New Zealand marine bryozoan Pterocella vesiculosa has resulted in the isolation of three new compounds; pterocellin H, pterocellin I and 1-methyl-5-bromo-8-methoxy-β-carboline. These compounds were characterised using high resolution mass spectrometry, one- and two-dimensional nuclear magnetic resonance spectroscopy and X-ray crystallography. The biological activity of these compounds was investigated and a discussion of the results including a comparison with the activity of closely related compounds is also presented.
The crude extracts of eighty-five marine organisms were surveyed to establish their biological activity and chemical constituents. The results of this study indicated which species had interesting biological activity. The chemical survey allowed geographical and intra-species comparisons of chemical constituents between samples, as well as potentially indicating the presence of known secondary metabolites. For the Pterocella vesiculosa samples the survey methodology clearly illustrated the presence of pterocellins A and B.
Two marine organisms were chosen for further investigation based on their biological activity and chemical survey results. Bioactivity directed isolation procedures yielded no new compounds from the organisms. The sterol composition of these species is also presented.

year: 2007

title: Spatial modelling of wetness for the Antarctic Dry Valleys

authors: Stichbury, Glen

subjects: GIS

abstract: This paper describes a method used to model relative wetness for part of the Antarctic Dry Valleys using Geographic Information Systems (GIS) and remote sensing. The model produces a relative index of liquid water availability using variables that influence the volume and distribution of water. Remote sensing using Moderate Resolution Imaging Spectroradiometer (MODIS) images collected over four years is used to calculate an average index of snow cover and this is combined with other water sources such as glaciers and lakes. This water source model is then used to weight a hydrological flow accumulation model that uses slope derived from Light Detection and Ranging (LIDAR) elevation data. The resulting wetness index is validated using three-dimensional visualization and a comparison with a high-resolution Advanced Land Observing Satellite image that shows drainage channels. This research demonstrates that it is possible to produce a wetness model of Antarctica using data that are becoming widely available.

text: Spatial modelling of wetness for the Antarctic Dry Valleys This paper describes a method used to model relative wetness for part of the Antarctic Dry Valleys using Geographic Information Systems (GIS) and remote sensing. The model produces a relative index of liquid water availability using variables that influence the volume and distribution of water. Remote sensing using Moderate Resolution Imaging Spectroradiometer (MODIS) images collected over four years is used to calculate an average index of snow cover and this is combined with other water sources such as glaciers and lakes. This water source model is then used to weight a hydrological flow accumulation model that uses slope derived from Light Detection and Ranging (LIDAR) elevation data. The resulting wetness index is validated using three-dimensional visualization and a comparison with a high-resolution Advanced Land Observing Satellite image that shows drainage channels. This research demonstrates that it is possible to produce a wetness model of Antarctica using data that are becoming widely available.

year: 2011

title: Leadership: Going beyond personal will and professional skills to give life to Ka Hikitia

authors: Berryman, Mere

subjects: education policy

abstract: This paper investigates the Ka Hikitia Māori education policy and its subsequent influence in effecting system change towards Māori students’ achievement. It discusses how a Request for Proposal to the Ministry of Education’s Building on Success was conceptualised to support English-medium secondary schools across New Zealand to address this policy. The result, Kia Eke Panuku, is a professional learning and development response that works with Strategic Change Leadership Teams to create culturally responsive and relational contexts for learning, focused on Māori students enjoying and achieving educational success as Māori. It is argued that neither a political mandate for change nor a set of learned strategies by school personnel will truly bring about a changed reality for Māori students. Rather the reform must be led by transformative leaders who are driven by both the moral imperative to change and a keen sense of urgency to see this happen in our schools for Māori students and their home communities.
The major issues raised in this paper, and the solutions that have been reached thus far, can help inform others who are trying to raise the participation, inclusion and achievement of students who may currently be marginalised from formal education settings.

text: Leadership: Going beyond personal will and professional skills to give life to Ka Hikitia This paper investigates the Ka Hikitia Māori education policy and its subsequent influence in effecting system change towards Māori students’ achievement. It discusses how a Request for Proposal to the Ministry of Education’s Building on Success was conceptualised to support English-medium secondary schools across New Zealand to address this policy. The result, Kia Eke Panuku, is a professional learning and development response that works with Strategic Change Leadership Teams to create culturally responsive and relational contexts for learning, focused on Māori students enjoying and achieving educational success as Māori. It is argued that neither a political mandate for change nor a set of learned strategies by school personnel will truly bring about a changed reality for Māori students. Rather the reform must be led by transformative leaders who are driven by both the moral imperative to change and a keen sense of urgency to see this happen in our schools for Māori students and their home communities.
The major issues raised in this paper, and the solutions that have been reached thus far, can help inform others who are trying to raise the participation, inclusion and achievement of students who may currently be marginalised from formal education settings.

year: 2015